computer_glamour
/
snac2-glamour-mirror
kopia lustrzana https://codeberg.org/grunfink/snac2


			
							1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315131613171318131913201321132213231324132513261327132813291330133113321333133413351336133713381339134013411342134313441345134613471348134913501351135213531354135513561357135813591360136113621363136413651366136713681369137013711372137313741375137613771378137913801381138213831384138513861387138813891390139113921393139413951396139713981399140014011402140314041405140614071408140914101411141214131414141514161417141814191420142114221423142414251426142714281429143014311432143314341435143614371438143914401441144214431444144514461447144814491450145114521453145414551456145714581459146014611462146314641465146614671468146914701471147214731474147514761477147814791480148114821483148414851486148714881489149014911492149314941495149614971498149915001501150215031504150515061507150815091510151115121513151415151516151715181519152015211522152315241525152615271528152915301531153215331534153515361537153815391540154115421543154415451546154715481549155015511552155315541555155615571558155915601561156215631564156515661567156815691570157115721573157415751576157715781579158015811582158315841585158615871588158915901591159215931594159515961597159815991600160116021603160416051606160716081609161016111612161316141615161616171618161916201621162216231624162516261627162816291630163116321633163416351636163716381639164016411642164316441645164616471648164916501651165216531654165516561657165816591660166116621663166416651666166716681669167016711672167316741675167616771678167916801681168216831684168516861687168816891690169116921693169416951696169716981699170017011702170317041705170617071708170917101711171217131714171517161717171817191720172117221723172417251726172717281729173017311732173317341735173617371738173917401741174217431744174517461747174817491750175117521753175417551756175717581759176017611762176317641765176617671768176917701771177217731774177517761777177817791780178117821783178417851786178717881789179017911792179317941795179617971798179918001801180218031804180518061807180818091810181118121813181418151816181718181819182018211822182318241825182618271828182918301831183218331834183518361837183818391840184118421843184418451846184718481849185018511852185318541855185618571858185918601861186218631864186518661867186818691870187118721873187418751876187718781879188018811882188318841885188618871888188918901891189218931894189518961897189818991900190119021903190419051906190719081909191019111912191319141915191619171918191919201921192219231924192519261927192819291930193119321933193419351936193719381939194019411942194319441945194619471948194919501951195219531954195519561957195819591960196119621963196419651966196719681969197019711972197319741975197619771978197919801981198219831984198519861987198819891990199119921993199419951996199719981999200020012002200320042005200620072008200920102011201220132014201520162017201820192020202120222023202420252026202720282029203020312032203320342035203620372038203920402041204220432044204520462047204820492050205120522053205420552056205720582059206020612062206320642065206620672068206920702071207220732074207520762077207820792080208120822083208420852086208720882089209020912092209320942095209620972098209921002101210221032104210521062107210821092110211121122113211421152116211721182119212021212122212321242125212621272128212921302131213221332134213521362137213821392140214121422143214421452146214721482149215021512152215321542155215621572158215921602161216221632164216521662167216821692170217121722173217421752176217721782179218021812182218321842185218621872188218921902191219221932194219521962197219821992200220122022203220422052206220722082209221022112212221322142215221622172218221922202221222222232224222522262227222822292230223122322233223422352236223722382239224022412242224322442245224622472248224922502251225222532254225522562257225822592260226122622263226422652266226722682269227022712272227322742275227622772278227922802281228222832284228522862287228822892290229122922293229422952296229722982299230023012302230323042305230623072308230923102311231223132314231523162317231823192320232123222323232423252326232723282329233023312332233323342335233623372338233923402341234223432344234523462347234823492350235123522353235423552356235723582359236023612362236323642365236623672368236923702371237223732374237523762377237823792380238123822383238423852386238723882389239023912392239323942395239623972398239924002401240224032404240524062407240824092410241124122413241424152416241724182419242024212422242324242425242624272428242924302431243224332434243524362437243824392440244124422443244424452446244724482449245024512452245324542455245624572458245924602461246224632464246524662467246824692470247124722473247424752476247724782479248024812482248324842485248624872488248924902491249224932494249524962497249824992500250125022503250425052506250725082509251025112512251325142515251625172518251925202521252225232524252525262527252825292530253125322533253425352536253725382539254025412542254325442545254625472548254925502551255225532554255525562557255825592560256125622563256425652566256725682569257025712572257325742575257625772578257925802581258225832584258525862587258825892590259125922593259425952596259725982599260026012602260326042605260626072608260926102611261226132614261526162617261826192620262126222623262426252626262726282629263026312632263326342635263626372638263926402641264226432644264526462647264826492650265126522653265426552656265726582659266026612662266326642665266626672668266926702671267226732674267526762677267826792680268126822683268426852686268726882689269026912692269326942695269626972698269927002701270227032704270527062707270827092710271127122713271427152716271727182719272027212722272327242725272627272728272927302731273227332734273527362737273827392740274127422743274427452746274727482749275027512752275327542755275627572758275927602761276227632764276527662767276827692770277127722773277427752776277727782779278027812782278327842785278627872788278927902791279227932794279527962797279827992800280128022803280428052806280728082809281028112812281328142815281628172818281928202821282228232824282528262827282828292830283128322833283428352836283728382839284028412842284328442845284628472848284928502851285228532854285528562857285828592860286128622863286428652866286728682869287028712872287328742875287628772878287928802881288228832884288528862887288828892890289128922893289428952896289728982899290029012902290329042905290629072908290929102911291229132914291529162917291829192920292129222923292429252926292729282929293029312932293329342935293629372938293929402941294229432944294529462947294829492950295129522953295429552956295729582959296029612962296329642965296629672968296929702971297229732974297529762977297829792980298129822983298429852986298729882989299029912992299329942995299629972998299930003001300230033004300530063007300830093010301130123013301430153016301730183019302030213022302330243025302630273028302930303031303230333034303530363037303830393040304130423043304430453046304730483049305030513052305330543055305630573058305930603061306230633064306530663067306830693070307130723073307430753076307730783079308030813082308330843085308630873088308930903091309230933094309530963097309830993100310131023103310431053106310731083109311031113112311331143115311631173118311931203121312231233124312531263127312831293130313131323133313431353136313731383139314031413142314331443145314631473148314931503151315231533154315531563157315831593160316131623163316431653166316731683169317031713172317331743175317631773178317931803181318231833184318531863187318831893190319131923193319431953196319731983199320032013202320332043205320632073208320932103211321232133214321532163217321832193220322132223223322432253226322732283229323032313232323332343235323632373238323932403241324232433244324532463247324832493250325132523253325432553256325732583259326032613262326332643265326632673268326932703271327232733274327532763277327832793280328132823283328432853286328732883289329032913292329332943295329632973298329933003301330233033304330533063307330833093310331133123313331433153316331733183319332033213322332333243325332633273328332933303331333233333334333533363337333833393340334133423343334433453346334733483349335033513352335333543355335633573358335933603361336233633364336533663367336833693370337133723373337433753376337733783379338033813382338333843385338633873388338933903391339233933394339533963397339833993400340134023403340434053406340734083409341034113412341334143415341634173418341934203421342234233424342534263427342834293430343134323433343434353436343734383439344034413442344334443445344634473448344934503451345234533454345534563457345834593460346134623463346434653466346734683469347034713472347334743475347634773478347934803481348234833484348534863487348834893490349134923493349434953496349734983499350035013502350335043505350635073508350935103511351235133514351535163517351835193520352135223523352435253526352735283529353035313532353335343535353635373538353935403541354235433544354535463547354835493550355135523553355435553556355735583559356035613562356335643565356635673568356935703571357235733574357535763577357835793580358135823583358435853586358735883589359035913592359335943595359635973598359936003601360236033604360536063607360836093610361136123613361436153616361736183619362036213622362336243625362636273628362936303631363236333634363536363637363836393640364136423643364436453646364736483649365036513652365336543655365636573658365936603661366236633664366536663667366836693670367136723673367436753676367736783679368036813682368336843685368636873688368936903691369236933694369536963697369836993700370137023703370437053706370737083709371037113712371337143715371637173718371937203721372237233724372537263727372837293730373137323733373437353736373737383739374037413742374337443745374637473748374937503751375237533754375537563757375837593760376137623763376437653766376737683769377037713772377337743775377637773778377937803781378237833784378537863787378837893790379137923793379437953796379737983799380038013802380338043805380638073808380938103811381238133814381538163817381838193820382138223823382438253826382738283829383038313832383338343835383638373838383938403841384238433844384538463847384838493850385138523853385438553856385738583859386038613862386338643865386638673868386938703871387238733874387538763877387838793880388138823883388438853886388738883889389038913892389338943895389638973898389939003901390239033904390539063907390839093910391139123913391439153916391739183919392039213922392339243925392639273928392939303931393239333934393539363937393839393940394139423943394439453946394739483949395039513952395339543955395639573958395939603961396239633964396539663967396839693970397139723973397439753976397739783979398039813982398339843985398639873988398939903991399239933994399539963997399839994000400140024003400440054006400740084009401040114012401340144015401640174018401940204021402240234024402540264027402840294030403140324033403440354036403740384039404040414042404340444045404640474048404940504051405240534054405540564057405840594060406140624063406440654066406740684069407040714072407340744075407640774078407940804081408240834084408540864087408840894090409140924093409440954096409740984099410041014102410341044105410641074108410941104111411241134114411541164117411841194120412141224123412441254126412741284129413041314132413341344135413641374138413941404141414241434144414541464147414841494150415141524153415441554156415741584159416041614162416341644165416641674168416941704171417241734174417541764177417841794180418141824183418441854186418741884189419041914192419341944195419641974198419942004201420242034204420542064207420842094210421142124213421442154216421742184219422042214222422342244225422642274228422942304231423242334234423542364237423842394240424142424243424442454246424742484249425042514252425342544255425642574258425942604261426242634264426542664267426842694270427142724273427442754276427742784279428042814282428342844285428642874288428942904291429242934294429542964297429842994300430143024303430443054306430743084309431043114312431343144315431643174318431943204321432243234324432543264327432843294330433143324333433443354336433743384339434043414342434343444345434643474348434943504351435243534354435543564357435843594360436143624363436443654366436743684369437043714372437343744375437643774378437943804381438243834384438543864387438843894390439143924393439443954396439743984399440044014402440344044405440644074408440944104411441244134414441544164417441844194420442144224423442444254426442744284429443044314432443344344435443644374438443944404441444244434444444544464447444844494450445144524453445444554456445744584459446044614462446344644465446644674468446944704471447244734474447544764477447844794480448144824483448444854486448744884489449044914492449344944495449644974498449945004501450245034504450545064507450845094510451145124513451445154516451745184519452045214522452345244525452645274528452945304531453245334534453545364537453845394540454145424543454445454546454745484549455045514552455345544555455645574558455945604561456245634564456545664567456845694570457145724573457445754576457745784579
							/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2026 grunfink et al. / MIT license */

#ifndef NO_MASTODON_API

#include "xs.h"
#include "xs_hex.h"
#include "xs_openssl.h"
#include "xs_json.h"
#include "xs_io.h"
#include "xs_time.h"
#include "xs_glob.h"
#include "xs_set.h"
#include "xs_random.h"
#include "xs_url.h"
#include "xs_mime.h"
#include "xs_match.h"
#include "xs_unicode.h"
#include "xs_http.h"

#include "snac.h"

#include <sys/time.h>

static xs_str *random_str(void)
/* just what is says in the tin */
{
    unsigned int data[4] = {0};

    xs_rnd_buf(data, sizeof(data));
    return xs_hex_enc((char *)data, sizeof(data));
}


int app_add(const char *id, const xs_dict *app)
/* stores an app */
{
    if (!xs_is_hex(id))
        return HTTP_STATUS_INTERNAL_SERVER_ERROR;

    int status = HTTP_STATUS_CREATED;
    xs *fn     = xs_fmt("%s/app/", srv_basedir);
    FILE *f;

    mkdirx(fn);
    fn = xs_str_cat(fn, id);
    fn = xs_str_cat(fn, ".json");

    if ((f = fopen(fn, "w")) != NULL) {
        xs_json_dump(app, 4, f);
        fclose(f);
    }
    else
        status = HTTP_STATUS_INTERNAL_SERVER_ERROR;

    return status;
}


xs_str *_app_fn(const char *id)
{
    return xs_fmt("%s/app/%s.json", srv_basedir, id);
}


xs_dict *app_get(const char *id)
/* gets an app */
{
    if (!xs_is_hex(id))
        return NULL;

    xs *fn       = _app_fn(id);
    xs_dict *app = NULL;
    FILE *f;

    if ((f = fopen(fn, "r")) != NULL) {
        app = xs_json_load(f);
        fclose(f);

    }

    return app;
}


int app_del(const char *id)
/* deletes an app */
{
    if (!xs_is_hex(id))
        return -1;

    xs *fn = _app_fn(id);

    return unlink(fn);
}


int token_add(const char *id, const xs_dict *token)
/* stores a token */
{
    if (!xs_is_hex(id))
        return HTTP_STATUS_INTERNAL_SERVER_ERROR;

    int status = HTTP_STATUS_CREATED;
    xs *fn     = xs_fmt("%s/token/", srv_basedir);
    FILE *f;

    mkdirx(fn);
    fn = xs_str_cat(fn, id);
    fn = xs_str_cat(fn, ".json");

    if ((f = fopen(fn, "w")) != NULL) {
        xs_json_dump(token, 4, f);
        fclose(f);
    }
    else
        status = HTTP_STATUS_INTERNAL_SERVER_ERROR;

    return status;
}


xs_dict *token_get(const char *id)
/* gets a token */
{
    if (!xs_is_hex(id))
        return NULL;

    xs *fn         = xs_fmt("%s/token/%s.json", srv_basedir, id);
    xs_dict *token = NULL;
    FILE *f;

    if ((f = fopen(fn, "r")) != NULL) {
        token = xs_json_load(f);
        fclose(f);

        /* 'touch' the file */
        utimes(fn, NULL);

        /* also 'touch' the app */
        const char *app_id = xs_dict_get(token, "client_id");

        if (app_id) {
            xs *afn = xs_fmt("%s/app/%s.json", srv_basedir, app_id);
            utimes(afn, NULL);
        }
    }

    return token;
}


int token_del(const char *id)
/* deletes a token */
{
    if (!xs_is_hex(id))
        return -1;

    xs *fn = xs_fmt("%s/token/%s.json", srv_basedir, id);

    return unlink(fn);
}


const char * const login_page = ""
"<!DOCTYPE html>\n"
"<html>\n"
"<head>\n"
"<title>%s OAuth - Snac2</title>\n"
"<meta content=\"width=device-width, initial-scale=1, minimum-scale=1, user-scalable=no\" name=\"viewport\">"
"<style>:root {color-scheme: light dark}</style>\n"
"</head>\n"
"<body><h1>%s OAuth identify</h1>\n"
"<div style=\"background-color: red; color: white\">%s</div>\n"
"<form method=\"post\" action=\"%s:/" "/%s/%s\">\n"
"<p>Login: <input type=\"text\" name=\"login\" autocapitalize=\"off\"></p>\n"
"<p>Password: <input type=\"password\" name=\"passwd\"></p>\n"
"<input type=\"hidden\" name=\"redir\" value=\"%s\">\n"
"<input type=\"hidden\" name=\"cid\" value=\"%s\">\n"
"<input type=\"hidden\" name=\"state\" value=\"%s\">\n"
"<input type=\"submit\" value=\"OK\">\n"
"</form><p>%s</p></body></html>\n"
"";

int oauth_get_handler(const xs_dict *req, const char *q_path,
                      char **body, int *b_size, char **ctype)
{
    (void)b_size;

    if (!xs_startswith(q_path, "/oauth/"))
        return 0;

    int status   = HTTP_STATUS_NOT_FOUND;
    const xs_dict *msg = xs_dict_get(req, "q_vars");
    xs *cmd      = xs_replace_n(q_path, "/oauth", "", 1);

    srv_debug(1, xs_fmt("oauth_get_handler %s", q_path));

    if (strcmp(cmd, "/authorize") == 0) { /** **/
        const char *cid   = xs_dict_get(msg, "client_id");
        const char *ruri  = xs_dict_get(msg, "redirect_uri");
        const char *rtype = xs_dict_get(msg, "response_type");
        const char *state = xs_dict_get(msg, "state");

        status = HTTP_STATUS_BAD_REQUEST;

        if (cid && ruri && rtype && strcmp(rtype, "code") == 0) {
            xs *app = app_get(cid);

            if (app != NULL) {
                const char *host = xs_dict_get(srv_config, "host");
                const char *proto = xs_dict_get_def(srv_config, "protocol", "https");

                if (xs_is_null(state))
                    state = "";

                *body  = xs_fmt(login_page, host, host, "", proto, host, "oauth/x-snac-login",
                                ruri, cid, state, USER_AGENT);
                *ctype = "text/html";
                status = HTTP_STATUS_OK;

                srv_debug(1, xs_fmt("oauth authorize: generating login page"));
            }
            else
                srv_debug(1, xs_fmt("oauth authorize: bad client_id %s", cid));
        }
        else
            srv_debug(1, xs_fmt("oauth authorize: invalid or unset arguments"));
    }
    else
    if (strcmp(cmd, "/x-snac-get-token") == 0) { /** **/
        const char *host = xs_dict_get(srv_config, "host");
        const char *proto = xs_dict_get_def(srv_config, "protocol", "https");

        *body  = xs_fmt(login_page, host, host, "", proto, host, "oauth/x-snac-get-token",
                        "", "", "", USER_AGENT);
        *ctype = "text/html";
        status = HTTP_STATUS_OK;

    }

    return status;
}


int oauth_post_handler(const xs_dict *req, const char *q_path,
                       const char *payload, int p_size,
                       char **body, int *b_size, char **ctype)
{
    (void)p_size;
    (void)b_size;

    if (!xs_startswith(q_path, "/oauth/"))
        return 0;

    int status   = HTTP_STATUS_NOT_FOUND;

    const char *i_ctype = xs_dict_get(req, "content-type");
    xs *args      = NULL;

    if (i_ctype && xs_startswith(i_ctype, "application/json")) {
        if (!xs_is_null(payload))
            args = xs_json_loads(payload);
    }
    else
    if (i_ctype && xs_startswith(i_ctype, "application/x-www-form-urlencoded") && payload) {
        args    = xs_url_vars(payload);
    }
    else
        args = xs_dup(xs_dict_get(req, "p_vars"));

    if (args == NULL)
        return HTTP_STATUS_BAD_REQUEST;

    xs *cmd = xs_replace_n(q_path, "/oauth", "", 1);

    srv_debug(1, xs_fmt("oauth_post_handler %s", q_path));

    if (strcmp(cmd, "/x-snac-login") == 0) { /** **/
        const char *login  = xs_dict_get(args, "login");
        const char *passwd = xs_dict_get(args, "passwd");
        const char *redir  = xs_dict_get(args, "redir");
        const char *cid    = xs_dict_get(args, "cid");
        const char *state  = xs_dict_get(args, "state");
        const char *host   = xs_dict_get(srv_config, "host");
        const char *proto = xs_dict_get_def(srv_config, "protocol", "https");

        /* by default, generate another login form with an error */
        *body  = xs_fmt(login_page, host, host, "LOGIN INCORRECT", proto, host, "oauth/x-snac-login",
                        redir, cid, state, USER_AGENT);
        *ctype = "text/html";
        status = HTTP_STATUS_OK;

        if (login && passwd && redir && cid) {
            snac snac;

            if (user_open(&snac, login)) {
                const char *addr = xs_or(xs_dict_get(req, "remote-addr"),
                                         xs_dict_get(req, "x-forwarded-for"));

                if (badlogin_check(login, addr)) {
                    /* check the login + password */
                    if (check_password(login, passwd, xs_dict_get(snac.config, "passwd"))) {
                        /* success! redirect to the desired uri */
                        xs *code = random_str();

                        xs_free(*body);

                        if (strcmp(redir, "urn:ietf:wg:oauth:2.0:oob") == 0) {
                            *body = xs_dup(code);
                        }
                        else {
                            if (xs_str_in(redir, "?") != -1)
                                *body = xs_fmt("%s&code=%s", redir, code);
                            else
                                *body = xs_fmt("%s?code=%s", redir, code);

                            status = HTTP_STATUS_SEE_OTHER;
                        }

                        /* if there is a state, add it */
                        if (!xs_is_null(state) && *state) {
                            *body = xs_str_cat(*body, "&state=");
                            *body = xs_str_cat(*body, state);
                        }

                        srv_log(xs_fmt("oauth x-snac-login: '%s' success, redirect to %s",
                                   login, *body));

                        /* assign the login to the app */
                        xs *app = app_get(cid);

                        if (app != NULL) {
                            app = xs_dict_set(app, "uid",  login);
                            app = xs_dict_set(app, "code", code);
                            app_add(cid, app);
                        }
                        else
                            srv_log(xs_fmt("oauth x-snac-login: error getting app %s", cid));
                    }
                    else {
                        srv_debug(1, xs_fmt("oauth x-snac-login: login '%s' incorrect", login));
                        badlogin_inc(login, addr);
                    }
                }

                user_free(&snac);
            }
            else
                srv_debug(1, xs_fmt("oauth x-snac-login: bad user '%s'", login));
        }
        else
            srv_debug(1, xs_fmt("oauth x-snac-login: invalid or unset arguments"));
    }
    else
    if (strcmp(cmd, "/token") == 0) { /** **/
        xs *wrk = NULL;
        xs *codewrk = NULL;
        const char *gtype = xs_dict_get(args, "grant_type");
        const char *code  = xs_dict_get(args, "code");
        const char *cid   = xs_dict_get(args, "client_id");
        const char *csec  = xs_dict_get(args, "client_secret");
        const char *ruri  = xs_dict_get(args, "redirect_uri");
        const char *scope = xs_dict_get(args, "scope");

        /* no client_secret? check if it's inside an authorization header
           (AndStatus does it this way) */
        if (xs_is_null(csec)) {
            const char *auhdr = xs_dict_get(req, "authorization");

            if (!xs_is_null(auhdr) && xs_startswith(auhdr, "Basic ")) {
                xs *s1 = xs_replace_n(auhdr, "Basic ", "", 1);
                int size;
                xs *s2 = xs_base64_dec(s1, &size);

                if (!xs_is_null(s2)) {
                    xs *l1 = xs_split(s2, ":");

                    if (xs_list_len(l1) == 2) {
                        wrk = xs_dup(xs_list_get(l1, 1));
                        csec = wrk;
                    }
                }
            }
        }

        /* no code?
           I'm not sure of the impacts of this right now, but Subway Tooter does not
           provide a code so one must be generated */
        if (xs_is_null(code)){
            code = codewrk = random_str();
        }
        if (gtype && code && cid && csec && ruri) {
            xs *app = app_get(cid);

            if (app == NULL) {
                status = HTTP_STATUS_UNAUTHORIZED;
                srv_log(xs_fmt("oauth token: invalid app %s", cid));
            }
            else
            if (strcmp(csec, xs_dict_get(app, "client_secret")) != 0) {
                status = HTTP_STATUS_UNAUTHORIZED;
                srv_log(xs_fmt("oauth token: invalid client_secret for app %s", cid));
            }
            else {
                xs *rsp   = xs_dict_new();
                xs *cat   = xs_number_new(time(NULL));
                xs *tokid = random_str();

                rsp = xs_dict_append(rsp, "access_token", tokid);
                rsp = xs_dict_append(rsp, "token_type",   "Bearer");
                rsp = xs_dict_append(rsp, "created_at",   cat);

                if (!xs_is_null(scope))
                    rsp = xs_dict_append(rsp, "scope", scope);
                else
                    rsp = xs_dict_append(rsp, "scope", "");

                *body  = xs_json_dumps(rsp, 4);
                *ctype = "application/json";
                status = HTTP_STATUS_OK;

                const char *uid = xs_dict_get(app, "uid");

                srv_debug(1, xs_fmt("oauth token: "
                                "successful login for %s, new token %s", uid, tokid));

                xs *token = xs_dict_new();
                token = xs_dict_append(token, "token",         tokid);
                token = xs_dict_append(token, "client_id",     cid);
                token = xs_dict_append(token, "client_secret", csec);
                token = xs_dict_append(token, "uid",           uid);
                token = xs_dict_append(token, "code",          code);

                token_add(tokid, token);
            }
        }
        else {
            srv_debug(1, xs_fmt("oauth token: invalid or unset arguments"));
            status = HTTP_STATUS_BAD_REQUEST;
        }
    }
    else
    if (strcmp(cmd, "/revoke") == 0) { /** **/
        const char *cid   = xs_dict_get(args, "client_id");
        const char *csec  = xs_dict_get(args, "client_secret");
        const char *tokid = xs_dict_get(args, "token");

        if (cid && csec && tokid) {
            xs *token = token_get(tokid);

            *body  = xs_str_new("{}");
            *ctype = "application/json";

            if (token == NULL || strcmp(csec, xs_dict_get(token, "client_secret")) != 0) {
                srv_debug(1, xs_fmt("oauth revoke: bad secret for token %s", tokid));
                status = HTTP_STATUS_FORBIDDEN;
            }
            else {
                token_del(tokid);
                srv_debug(1, xs_fmt("oauth revoke: revoked token %s", tokid));
                status = HTTP_STATUS_OK;

                /* also delete the app, as it serves no purpose from now on */
                app_del(cid);
            }
        }
        else {
            srv_debug(1, xs_fmt("oauth revoke: invalid or unset arguments"));
            status = HTTP_STATUS_FORBIDDEN;
        }
    }
    if (strcmp(cmd, "/x-snac-get-token") == 0) { /** **/
        const char *login  = xs_dict_get(args, "login");
        const char *passwd = xs_dict_get(args, "passwd");
        const char *host   = xs_dict_get(srv_config, "host");
        const char *proto  = xs_dict_get_def(srv_config, "protocol", "https");

        /* by default, generate another login form with an error */
        *body  = xs_fmt(login_page, host, host, "LOGIN INCORRECT", proto, host, "oauth/x-snac-get-token",
                        "", "", "", USER_AGENT);
        *ctype = "text/html";
        status = HTTP_STATUS_OK;

        if (login && passwd) {
            snac user;

            if (user_open(&user, login)) {
                const char *addr = xs_or(xs_dict_get(req, "remote-addr"),
                                         xs_dict_get(req, "x-forwarded-for"));

                if (badlogin_check(login, addr)) {
                    /* check the login + password */
                    if (check_password(login, passwd, xs_dict_get(user.config, "passwd"))) {
                        /* success! create a new token */
                        xs *tokid = random_str();

                        srv_debug(1, xs_fmt("x-snac-new-token: "
                                    "successful login for %s, new token %s", login, tokid));

                        xs *token = xs_dict_new();
                        token = xs_dict_append(token, "token",         tokid);
                        token = xs_dict_append(token, "client_id",     "snac-client");
                        token = xs_dict_append(token, "client_secret", "");
                        token = xs_dict_append(token, "uid",           login);
                        token = xs_dict_append(token, "code",          "");

                        token_add(tokid, token);

                        *ctype = "text/plain";
                        xs_free(*body);
                        *body = xs_dup(tokid);
                    }
                    else
                        badlogin_inc(login, addr);

                    user_free(&user);
                }
            }
        }
    }

    return status;
}


xs_str *mastoapi_id(const xs_dict *msg)
/* returns a somewhat Mastodon-compatible status id */
{
    const char *id = xs_dict_get(msg, "id");
    xs *md5        = xs_md5_hex(id, strlen(id));

    return xs_fmt("%10.0f%s", object_ctime_by_md5(md5), md5);
}

#define MID_TO_MD5(id) (id + 10)


static xs_val *get_count_from_actor(const xs_dict *actor, const char *field_names[], const char *collection_url_field)
/* helper to extract count from actor dict using various field name variations or from cached collection */
{
    xs_val *count = NULL;

    /* try direct field name variations first */
    for (int i = 0; field_names[i] && xs_type(count) != XSTYPE_NUMBER; i++) {
        const xs_number *val = xs_dict_get(actor, field_names[i]);
        if (xs_type(val) == XSTYPE_NUMBER)
            count = xs_dup(val);
    }

    /* if not found directly, try to get from cached collection object */
    if (xs_type(count) != XSTYPE_NUMBER) {
        const char *url = xs_dict_get(actor, collection_url_field);
        if (!xs_is_null(url)) {
            xs *coll = NULL;
            if (valid_status(object_get(url, &coll))) {
                const xs_number *total = xs_dict_get(coll, "totalItems");
                if (xs_type(total) == XSTYPE_NUMBER)
                    count = xs_dup(total);
            }
        }
    }

    return count;
}


static const xs_list *get_collection_items(snac *snac, const char *collection_url,
                                           xs_dict **out_collection, xs_dict **out_page)
/* fetches items from an ActivityPub collection (outbox, etc) with minimal HTTP requests */
{
    const xs_list *items = NULL;
    xs_dict *collection = NULL;

    if (valid_status(activitypub_request(snac, collection_url, &collection))) {
        /* check if items are directly embedded */
        items = xs_dict_get(collection, "orderedItems");
        if (xs_is_null(items))
            items = xs_dict_get(collection, "items");

        if (!xs_is_null(items)) {
            /* items found in main collection - transfer ownership to keep items valid */
            if (out_collection)
                *out_collection = collection;
            return items;
        }

        /* if no items, try fetching first page (only 1 extra request) */
        const char *first_url = xs_dict_get(collection, "first");
        if (!xs_is_null(first_url)) {
            xs_dict *first_page = NULL;
            if (valid_status(activitypub_request(snac, first_url, &first_page))) {
                items = xs_dict_get(first_page, "orderedItems");
                if (xs_is_null(items))
                    items = xs_dict_get(first_page, "items");

                if (!xs_is_null(items)) {
                    /* items found in first page - transfer ownership to keep items valid */
                    if (out_page)
                        *out_page = first_page;
                    xs_free(collection);
                    return items;
                }
                xs_free(first_page);
            }
        }
        xs_free(collection);
    }

    return NULL;
}


static const xs_dict *extract_post_from_item(const xs_val *item)
/* extracts the post object from an outbox item, handling Create/Announce wrappers */
{
    if (xs_type(item) != XSTYPE_DICT)
        return NULL;

    const char *item_type = xs_dict_get(item, "type");
    const xs_dict *post = item;

    /* if it's an activity, try to get embedded object */
    if (!xs_is_null(item_type) &&
        (strcmp(item_type, "Create") == 0 || strcmp(item_type, "Announce") == 0)) {
        const xs_val *obj = xs_dict_get(item, "object");

        /* only use embedded objects, skip URL references (would need HTTP fetch) */
        if (!xs_is_null(obj) && xs_type(obj) == XSTYPE_DICT)
            post = obj;
        else
            return NULL;
    }

    return post;
}


static int is_valid_post_type(const char *post_type)
/* checks if a type is a valid post type for timeline display */
{
    return !xs_is_null(post_type) &&
           (strcmp(post_type, "Note") == 0 ||
            strcmp(post_type, "Article") == 0 ||
            strcmp(post_type, "Question") == 0 ||
            strcmp(post_type, "Page") == 0);
}


xs_dict *mastoapi_account(snac *logged, const xs_dict *actor)
/* converts an ActivityPub actor to a Mastodon account */
{
    const char *id  = xs_dict_get(actor, "id");
    const char *pub = xs_dict_get(actor, "published");
    const char *proxy = NULL;

    if (xs_type(id) != XSTYPE_STRING)
        return NULL;

    if (logged && xs_is_true(xs_dict_get(srv_config, "proxy_media")))
        proxy = logged->actor;

    const char *prefu = xs_dict_get(actor, "preferredUsername");

    const char *display_name = xs_dict_get(actor, "name");
    if (xs_is_null(display_name) || *display_name == '\0')
        display_name = prefu;

    xs_dict *acct = xs_dict_new();
    xs *acct_md5  = xs_md5_hex(id, strlen(id));
    acct = xs_dict_append(acct, "id",           acct_md5);
    acct = xs_dict_append(acct, "username",     prefu);
    acct = xs_dict_append(acct, "display_name", display_name);
    acct = xs_dict_append(acct, "discoverable", xs_stock(XSTYPE_TRUE));
    acct = xs_dict_append(acct, "group",        xs_stock(XSTYPE_FALSE));
    acct = xs_dict_append(acct, "hide_collections", xs_stock(XSTYPE_FALSE));
    acct = xs_dict_append(acct, "indexable",    xs_stock(XSTYPE_TRUE));
    acct = xs_dict_append(acct, "noindex",      xs_stock(XSTYPE_FALSE));
    acct = xs_dict_append(acct, "roles",        xs_stock(XSTYPE_LIST));

    {
        /* create the acct field as user@host */
        xs *l     = xs_split(id, "/");
        xs *fquid = xs_fmt("%s@%s", prefu, xs_list_get(l, 2));
        acct      = xs_dict_append(acct, "acct", fquid);
    }

    if (pub)
        acct = xs_dict_append(acct, "created_at", pub);
    else {
        /* unset created_at crashes Tusky, so lie like a mf */
        xs *date = xs_str_utctime(0, ISO_DATE_SPEC);
        acct = xs_dict_append(acct, "created_at", date);
    }

    xs *last_status_at = xs_str_utctime(0, "%Y-%m-%d");
    acct = xs_dict_append(acct, "last_status_at", last_status_at);

    const char *note = xs_dict_get(actor, "summary");
    if (xs_is_null(note))
        note = "";

    if (strcmp(xs_dict_get(actor, "type"), "Service") == 0)
        acct = xs_dict_append(acct, "bot", xs_stock(XSTYPE_TRUE));
    else
        acct = xs_dict_append(acct, "bot", xs_stock(XSTYPE_FALSE));

    acct = xs_dict_append(acct, "note", note);

    acct = xs_dict_append(acct, "url", id);
    acct = xs_dict_append(acct, "uri", id);

    xs *avatar  = NULL;
    const xs_dict *av = xs_dict_get(actor, "icon");

    if (xs_type(av) == XSTYPE_DICT) {
        const char *url = xs_dict_get(av, "url");

        if (url != NULL)
            avatar = make_url(url, proxy, 1);
    }

    if (avatar == NULL)
        avatar = xs_fmt("%s/susie.png", srv_baseurl);

    acct = xs_dict_append(acct, "avatar", avatar);
    acct = xs_dict_append(acct, "avatar_static", avatar);

    xs *header  = NULL;
    const xs_dict *hd = xs_dict_get(actor, "image");

    if (xs_type(hd) == XSTYPE_DICT)
        header = make_url(xs_dict_get(hd, "url"), proxy, 1);

    if (xs_is_null(header))
        header = xs_str_new(NULL);

    acct = xs_dict_append(acct, "header", header);
    acct = xs_dict_append(acct, "header_static", header);

    /* emojis */
    const xs_list *p;
    if (!xs_is_null(p = xs_dict_get(actor, "tag"))) {
        xs *eml = xs_list_new();
        const xs_dict *v;
        int c = 0;

        while (xs_list_next(p, &v, &c)) {
            const char *type = xs_dict_get(v, "type");

            if (!xs_is_null(type) && strcmp(type, "Emoji") == 0) {
                const char *name    = xs_dict_get(v, "name");
                const xs_dict *icon = xs_dict_get(v, "icon");

                if (!xs_is_null(name) && !xs_is_null(icon)) {
                    const char *o_url = xs_dict_get(icon, "url");

                    if (!xs_is_null(o_url)) {
                        xs *url = make_url(o_url, proxy, 1);
                        xs *nm = xs_strip_chars_i(xs_dup(name), ":");
                        xs *d1 = xs_dict_new();

                        d1 = xs_dict_append(d1, "shortcode",         nm);
                        d1 = xs_dict_append(d1, "url",               url);
                        d1 = xs_dict_append(d1, "static_url",        url);
                        d1 = xs_dict_append(d1, "visible_in_picker", xs_stock(XSTYPE_TRUE));

                        eml = xs_list_append(eml, d1);
                    }
                }
            }
        }

        acct = xs_dict_append(acct, "emojis", eml);
    }

    acct = xs_dict_append(acct, "locked", xs_stock(XSTYPE_FALSE));

    /* try to get counts from actor object if available (some servers include these) */
    const char *fcount_fields[] = { "followersCount", "followers_count", NULL };
    const char *gcount_fields[] = { "followingCount", "following_count", NULL };
    const char *scount_fields[] = { "statusesCount", "statuses_count", "totalItems", NULL };

    xs *followers_count = get_count_from_actor(actor, fcount_fields, "followers");
    xs *following_count = get_count_from_actor(actor, gcount_fields, "following");
    xs *statuses_count = get_count_from_actor(actor, scount_fields, "outbox");

    acct = xs_dict_append(acct, "followers_count",
        xs_type(followers_count) == XSTYPE_NUMBER ? followers_count : xs_stock(0));
    acct = xs_dict_append(acct, "following_count",
        xs_type(following_count) == XSTYPE_NUMBER ? following_count : xs_stock(0));
    acct = xs_dict_append(acct, "statuses_count",
        xs_type(statuses_count) == XSTYPE_NUMBER ? statuses_count : xs_stock(0));

    xs *fields = xs_list_new();
    p = xs_dict_get(actor, "attachment");
    const xs_dict *v;

    /* dict of validated links */
    xs_dict *val_links = NULL;
    const xs_dict *metadata  = xs_stock(XSTYPE_DICT);
    snac user = {0};

    if (xs_startswith(id, srv_baseurl)) {
        /* if it's a local user, open it and pick its validated links */
        if (user_open(&user, prefu)) {
            val_links = user.links;
            metadata  = xs_dict_get_def(user.config, "metadata", xs_stock(XSTYPE_DICT));

            /* does this user want to publish their contact metrics? */
            if (xs_is_true(xs_dict_get(user.config, "show_contact_metrics"))) {
                int fwing = following_list_len(&user);
                int fwers = follower_list_len(&user);
                xs *ni = xs_number_new(fwing);
                xs *ne = xs_number_new(fwers);

                acct = xs_dict_append(acct, "followers_count", ne);
                acct = xs_dict_append(acct, "following_count", ni);
            }
        }
    }

    if (xs_is_null(val_links))
        val_links = xs_stock(XSTYPE_DICT);

    int c = 0;
    while (xs_list_next(p, &v, &c)) {
        const char *type  = xs_dict_get(v, "type");
        const char *name  = xs_dict_get(v, "name");
        const char *value = xs_dict_get(v, "value");

        if (!xs_is_null(type) && !xs_is_null(name) &&
            !xs_is_null(value) && strcmp(type, "PropertyValue") == 0) {
            xs *val_date = NULL;

            const char *url = xs_dict_get(metadata, name);

            if (!xs_is_null(url) && xs_startswith(url, "https:/" "/")) {
                const xs_number *verified_time = xs_dict_get(val_links, url);
                if (xs_type(verified_time) == XSTYPE_NUMBER) {
                    time_t t = xs_number_get(verified_time);

                    if (t > 0)
                        val_date = xs_str_utctime(t, ISO_DATE_SPEC);
                }
            }

            xs *d = xs_dict_new();

            d = xs_dict_append(d, "name", name);
            d = xs_dict_append(d, "value", value);
            d = xs_dict_append(d, "verified_at",
                xs_type(val_date) == XSTYPE_STRING && *val_date ?
                    val_date : xs_stock(XSTYPE_NULL));

            fields = xs_list_append(fields, d);
        }
    }

    user_free(&user);

    acct = xs_dict_append(acct, "fields", fields);

    return acct;
}


xs_str *mastoapi_date(const char *date)
/* converts an ISO 8601 date to whatever format Mastodon uses */
{
    xs_str *s = xs_crop_i(xs_dup(date), 0, 19);
    s = xs_str_cat(s, ".000Z");

    return s;
}


xs_dict *mastoapi_poll(snac *snac, const xs_dict *msg)
/* creates a mastoapi Poll object */
{
    xs_dict *poll = xs_dict_new();
    xs *mid       = mastoapi_id(msg);
    const xs_list *opts = NULL;
    const xs_val *v;
    int num_votes = 0;
    xs *options = xs_list_new();

    poll = xs_dict_append(poll, "id", mid);
    const char *date = xs_dict_get(msg, "endTime");
    if (date == NULL)
        date = xs_dict_get(msg, "closed");
    if (date == NULL)
        return NULL;

    xs *fd = mastoapi_date(date);
    poll = xs_dict_append(poll, "expires_at", fd);

    date = xs_dict_get(msg, "closed");
    time_t t = 0;

    if (date != NULL)
        t = xs_parse_iso_date(date, 0);

    poll = xs_dict_append(poll, "expired",
            t < time(NULL) ? xs_stock(XSTYPE_FALSE) : xs_stock(XSTYPE_TRUE));

    if ((opts = xs_dict_get(msg, "oneOf")) != NULL)
        poll = xs_dict_append(poll, "multiple", xs_stock(XSTYPE_FALSE));
    else {
        opts = xs_dict_get(msg, "anyOf");
        poll = xs_dict_append(poll, "multiple", xs_stock(XSTYPE_TRUE));
    }

    int c = 0;
    while (xs_list_next(opts, &v, &c)) {
        const char *title   = xs_dict_get(v, "name");
        const char *replies = xs_dict_get(v, "replies");

        if (title && replies) {
            const char *votes_count = xs_dict_get(replies, "totalItems");

            if (xs_type(votes_count) == XSTYPE_NUMBER) {
                xs *d = xs_dict_new();
                d = xs_dict_append(d, "title",  title);
                d = xs_dict_append(d, "votes_count", votes_count);

                options = xs_list_append(options, d);
                num_votes += xs_number_get(votes_count);
            }
        }
    }

    poll = xs_dict_append(poll, "options", options);
    xs *vc = xs_number_new(num_votes);
    poll = xs_dict_append(poll, "votes_count", vc);

    poll = xs_dict_append(poll, "emojis", xs_stock(XSTYPE_LIST));

    poll = xs_dict_append(poll, "voted",
            (snac && was_question_voted(snac, xs_dict_get(msg, "id"))) ?
                xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    return poll;
}


xs_dict *mastoapi_status(snac *snac, const xs_dict *msg)
/* converts an ActivityPub note to a Mastodon status */
{
    xs *actor = NULL;
    actor_get_refresh(snac, get_atto(msg), &actor);
    const char *proxy = NULL;

    /* if the author is not here, discard */
    if (actor == NULL)
        return NULL;

    if (snac && xs_is_true(xs_dict_get(srv_config, "proxy_media")))
        proxy = snac->actor;

    const char *type = xs_dict_get(msg, "type");
    const char *id   = xs_dict_get(msg, "id");

    /* fail if it's not a valid actor */
    if (xs_is_null(type) || xs_is_null(id))
        return NULL;

    xs *acct = mastoapi_account(snac, actor);
    if (acct == NULL)
        return NULL;

    xs *idx = NULL;
    xs *ixc = NULL;
    const char *tmp;
    xs *mid  = mastoapi_id(msg);

    xs_dict *st = xs_dict_new();

    st = xs_dict_append(st, "id",           mid);
    st = xs_dict_append(st, "uri",          id);
    st = xs_dict_append(st, "url",          id);
    st = xs_dict_append(st, "account",      acct);

    const char *published = xs_dict_get(msg, "published");
    xs *fd = NULL;

    if (published)
        fd = mastoapi_date(published);
    else {
        xs *p = xs_str_iso_date(0);
        fd = mastoapi_date(p);
    }

    st = xs_dict_append(st, "created_at", fd);

    {
        const char *content = xs_dict_get(msg, "content");
        const char *name    = xs_dict_get(msg, "name");
        xs *s1 = NULL;

        if (name && content)
            s1 = xs_fmt("%s<br><br>%s", name, content);
        else
        if (name)
            s1 = xs_dup(name);
        else
        if (content)
            s1 = xs_dup(content);
        else
            s1 = xs_str_new(NULL);

        st = xs_dict_append(st, "content", s1);
    }

    /* determine visibility: https://docs.joinmastodon.org/entities/Status/#visibility */
    const int scope = get_msg_visibility(msg);
    if (scope == SCOPE_PUBLIC)
        st = xs_dict_append(st, "visibility", "public");
    else if (scope == SCOPE_FOLLOWERS)
        st = xs_dict_append(st, "visibility", "private");
    else if (scope == SCOPE_MENTIONED)
        st = xs_dict_append(st, "visibility", "direct");
    else if (scope == SCOPE_UNLISTED)
        st = xs_dict_append(st, "visibility", "unlisted");

    tmp = xs_dict_get(msg, "sensitive");
    if (xs_is_null(tmp))
        tmp = xs_stock(XSTYPE_FALSE);

    st = xs_dict_append(st, "sensitive",    tmp);

    tmp = xs_dict_get(msg, "summary");
    if (xs_is_null(tmp))
        tmp = "";

    st = xs_dict_append(st, "spoiler_text", tmp);

    /* create the list of attachments */
    xs *attach = get_attachments(msg);

    {
        xs_list *p = attach;
        const xs_dict *v;

        xs *matt = xs_list_new();

        while (xs_list_iter(&p, &v)) {
            const char *type = xs_dict_get(v, "type");
            const char *o_href = xs_dict_get(v, "href");
            const char *name = xs_dict_get(v, "name");

            if (xs_match(type, "image/*|video/*|audio/*|Image|Video")) { /* */
                xs *matteid = xs_fmt("%s_%d", id, xs_list_len(matt));
                xs *href = make_url(o_href, proxy, 1);

                xs *d = xs_dict_new();

                d = xs_dict_append(d, "id",          matteid);
                d = xs_dict_append(d, "url",         href);
                d = xs_dict_append(d, "preview_url", href);
                d = xs_dict_append(d, "remote_url",  href);
                d = xs_dict_append(d, "description", name);

                d = xs_dict_append(d, "type", (*type == 'v' || *type == 'V') ? "video" :
                                              (*type == 'a' || *type == 'A') ? "audio" : "image");

                matt = xs_list_append(matt, d);
            }
        }

        st = xs_dict_append(st, "media_attachments", matt);
    }

    {
        xs *ml  = xs_list_new();
        xs *htl = xs_list_new();
        xs *eml = xs_list_new();
        const xs_list *tag = xs_dict_get(msg, "tag");
        int n = 0;

        xs *tag_list = NULL;

        if (xs_type(tag) == XSTYPE_DICT) {
            tag_list = xs_list_new();
            tag_list = xs_list_append(tag_list, tag);
        }
        else
        if (xs_type(tag) == XSTYPE_LIST)
            tag_list = xs_dup(tag);
        else
            tag_list = xs_list_new();

        tag = tag_list;
        const xs_dict *v;

        int c = 0;
        while (xs_list_next(tag, &v, &c)) {
            const char *type = xs_dict_get(v, "type");

            if (xs_is_null(type))
                continue;

            xs *d1 = xs_dict_new();

            if (strcmp(type, "Mention") == 0) {
                const char *name = xs_dict_get(v, "name");
                const char *href = xs_dict_get(v, "href");

                if (!xs_is_null(name) && !xs_is_null(href) &&
                    (snac == NULL || strcmp(href, snac->actor) != 0)) {
                    xs *nm = xs_strip_chars_i(xs_dup(name), "@");

                    xs *id = xs_fmt("%d", n++);
                    d1 = xs_dict_append(d1, "id", id);
                    d1 = xs_dict_append(d1, "username", nm);
                    d1 = xs_dict_append(d1, "acct", nm);
                    d1 = xs_dict_append(d1, "url", href);

                    ml = xs_list_append(ml, d1);
                }
            }
            else
            if (strcmp(type, "Hashtag") == 0) {
                const char *name = xs_dict_get(v, "name");
                const char *href = xs_dict_get(v, "href");

                if (!xs_is_null(name) && !xs_is_null(href)) {
                    xs *nm = xs_strip_chars_i(xs_dup(name), "#");

                    d1 = xs_dict_append(d1, "name", nm);
                    d1 = xs_dict_append(d1, "url", href);

                    htl = xs_list_append(htl, d1);
                }
            }
            else
            if (strcmp(type, "Emoji") == 0) {
                const char *name    = xs_dict_get(v, "name");
                const xs_dict *icon = xs_dict_get(v, "icon");

                if (!xs_is_null(name) && !xs_is_null(icon)) {
                    const char *o_url = xs_dict_get(icon, "url");

                    if (!xs_is_null(o_url)) {
                        xs *url = make_url(o_url, snac ? snac->actor : NULL, 1);
                        xs *nm = xs_strip_chars_i(xs_dup(name), ":");

                        d1 = xs_dict_append(d1, "shortcode", nm);
                        d1 = xs_dict_append(d1, "url", url);
                        d1 = xs_dict_append(d1, "static_url", url);
                        d1 = xs_dict_append(d1, "visible_in_picker", xs_stock(XSTYPE_TRUE));
                        d1 = xs_dict_append(d1, "category", "Emojis");

                        eml = xs_list_append(eml, d1);
                    }
                }
            }
        }

        st = xs_dict_append(st, "mentions", ml);
        st = xs_dict_append(st, "tags",     htl);
        st = xs_dict_append(st, "emojis",   eml);
    }
    {
        xs *rl   = object_get_emoji_reacts(id);
        xs *frl  = xs_list_new(); /* final */
        xs *sfrl = xs_dict_new(); /* seen */
        int c = 0;
        const char *v;

        while (xs_list_next(rl, &v, &c)) {
            xs *msg = NULL;
            if (valid_status(object_get_by_md5(v, &msg))) {
                const char *content = xs_dict_get(msg, "content");
                const char *actor = xs_dict_get(msg, "actor");
                const xs_list *contentl = xs_dict_get(sfrl, content);

                if ((snac && is_muted(snac, actor)) || is_instance_blocked(actor))
                    continue;

                /* NOTE: idk when there are no actor, but i encountered that bug.
                 * Probably because of one of my previous attempts.
                 * Keeping this just in case, can remove later */
                const char *me = actor && snac && strcmp(actor, snac->actor) == 0 ?
                    xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE);
                int count = 1;

                if (contentl) {
                    count = xs_number_get(xs_list_get(contentl, 0)) + 1;
                    if (strncmp(xs_list_get(contentl, 1), xs_stock(XSTYPE_TRUE), 1) == 0)
                        me = xs_stock(XSTYPE_TRUE);
                }

                xs *fl = xs_list_new();
                xs *c1 = xs_number_new(count);
                fl = xs_list_append(fl, c1, me);
                sfrl = xs_dict_append(sfrl, content, fl);
            }
        }

        c = 0;

        while (xs_list_next(rl, &v, &c)) {
            xs *msg = NULL;
            if (valid_status(object_get_by_md5(v, &msg))) {
                xs *d1 = xs_dict_new();

                const xs_dict *icon = xs_dict_get(xs_list_get(xs_dict_get(msg, "tag"), 0), "icon");
                const char *o_url = xs_dict_get(icon, "url");
                const char *name = xs_dict_get(msg, "content");
                const char *actor = xs_dict_get(msg, "actor");

                xs *nm = xs_dup(name);
                xs *url = NULL;

                if (!xs_is_null(o_url)) {
                    if (actor && snac && !strcmp(actor, snac->actor))
                        url = make_url(o_url, NULL, 1);
                    else
                        url = xs_dup(o_url);
                }

                xs *accounts = xs_list_new();
                if (actor) {
                    xs *d2 = NULL;
                    if (valid_status(object_get(actor, &d2))) {
                        xs *e_acct = mastoapi_account(snac, d2);
                        accounts = xs_list_append(accounts, e_acct);
                    }
                }

                const xs_list *item = xs_dict_get(sfrl, nm);
                const xs_str *nb = xs_list_get(item, 0);
                const xs_val *me = xs_list_get(item, 1);
                if (item == NULL)
                    continue;

                if (nm && strcmp(nm, "")) {
                    if (url && strcmp(url, "")) {
                        d1 = xs_dict_append(d1, "name",              nm);
                        d1 = xs_dict_append(d1, "shortcode",         nm);
                        d1 = xs_dict_append(d1, "accounts",          accounts);
                        d1 = xs_dict_append(d1, "me",                me);
                        d1 = xs_dict_append(d1, "url",               url);
                        d1 = xs_dict_append(d1, "static_url",        url);
                        d1 = xs_dict_append(d1, "visible_in_picker", xs_stock(XSTYPE_TRUE));
                        d1 = xs_dict_append(d1, "count", nb);
                    } else {
                        d1 = xs_dict_append(d1, "name",              nm);
                        d1 = xs_dict_append(d1, "count",             nb);
                        d1 = xs_dict_append(d1, "me",                me);
                        d1 = xs_dict_append(d1, "visible_in_picker", xs_stock(XSTYPE_TRUE));
                    }
                    sfrl = xs_dict_del(sfrl, nm);
                    frl = xs_list_append(frl, d1);
                }
            }
        }

        st = xs_dict_append(st, "reactions", frl);
    }

    xs_free(idx);
    xs_free(ixc);
    idx = object_likes(id);
    ixc = xs_number_new(xs_list_len(idx));

    st = xs_dict_append(st, "favourites_count", ixc);
    st = xs_dict_append(st, "favourited",
        (snac && xs_list_in(idx, snac->md5) != -1) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    xs_free(idx);
    xs_free(ixc);
    idx = object_announces(id);
    ixc = xs_number_new(xs_list_len(idx));

    st = xs_dict_append(st, "reblogs_count", ixc);
    st = xs_dict_append(st, "reblogged",
        (snac && xs_list_in(idx, snac->md5) != -1) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    /* get the last person who boosted this */
    xs *boosted_by_md5 = NULL;
    if (xs_list_len(idx))
        boosted_by_md5 = xs_dup(xs_list_get(idx, -1));

    xs_free(idx);
    xs_free(ixc);
    idx = object_children(id);
    ixc = xs_number_new(xs_list_len(idx));

    st = xs_dict_append(st, "replies_count", ixc);

    /* default in_reply_to values */
    st = xs_dict_append(st, "in_reply_to_id",         xs_stock(XSTYPE_NULL));
    st = xs_dict_append(st, "in_reply_to_account_id", xs_stock(XSTYPE_NULL));

    tmp = get_in_reply_to(msg);
    if (!xs_is_null(tmp)) {
        xs *irto = NULL;

        if (valid_status(object_get(tmp, &irto))) {
            xs *irt_mid = mastoapi_id(irto);
            st = xs_dict_set(st, "in_reply_to_id", irt_mid);

            const char *at = NULL;
            if (!xs_is_null(at = get_atto(irto))) {
                xs *at_md5 = xs_md5_hex(at, strlen(at));
                st = xs_dict_set(st, "in_reply_to_account_id", at_md5);
            }
        }
    }

    st = xs_dict_append(st, "reblog",   xs_stock(XSTYPE_NULL));
    st = xs_dict_append(st, "card",     xs_stock(XSTYPE_NULL));
    st = xs_dict_append(st, "language", "en");

    st = xs_dict_append(st, "filtered", xs_stock(XSTYPE_LIST));
    st = xs_dict_append(st, "muted",    xs_stock(XSTYPE_FALSE));

    tmp = xs_dict_get(msg, "sourceContent");
    if (xs_is_null(tmp))
        tmp = "";

    st = xs_dict_append(st, "text", tmp);

    tmp = xs_dict_get(msg, "updated");
    xs *fd2 = NULL;
    if (xs_is_null(tmp))
        tmp = xs_stock(XSTYPE_NULL);
    else {
        fd2 = mastoapi_date(tmp);
        tmp = fd2;
    }

    st = xs_dict_append(st, "edited_at", tmp);

    if (strcmp(type, "Question") == 0) {
        xs *poll = mastoapi_poll(snac, msg);
        st = xs_dict_append(st, "poll", poll);
    }
    else
        st = xs_dict_append(st, "poll", xs_stock(XSTYPE_NULL));

    st = xs_dict_append(st, "bookmarked",
        (snac && is_bookmarked(snac, id)) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    st = xs_dict_append(st, "pinned",
        (snac && is_pinned(snac, id)) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    /* is it a boost? */
    if (!xs_is_null(boosted_by_md5)) {
        /* create a new dummy status, using st as the 'reblog' field */
        xs_dict *bst = xs_dup(st);
        xs *b_actor = NULL;

        if (valid_status(object_get_by_md5(boosted_by_md5, &b_actor))) {
            xs *b_acct   = mastoapi_account(snac, b_actor);
            xs *fake_uri = NULL;

            if (snac)
                fake_uri = xs_fmt("%s/d/%s/Announce", snac->actor, mid);
            else
                fake_uri = xs_fmt("%s#%s", srv_baseurl, mid);

            bst = xs_dict_set(bst, "uri", fake_uri);
            bst = xs_dict_set(bst, "url", fake_uri);
            bst = xs_dict_set(bst, "account", b_acct);
            bst = xs_dict_set(bst, "content", "");
            bst = xs_dict_set(bst, "reblog", st);

            xs *b_id = xs_toupper_i(xs_dup(xs_dict_get(st, "id")));
            bst = xs_dict_set(bst, "id", b_id);

            xs_free(st);
            st = bst;
        }
        else
            xs_free(bst);
    }

    return st;
}


xs_dict *mastoapi_relationship(snac *snac, const char *md5)
{
    xs_dict *rel = NULL;
    xs *actor_o  = NULL;

    if (valid_status(object_get_by_md5(md5, &actor_o))) {
        rel = xs_dict_new();

        const char *actor = xs_dict_get(actor_o, "id");

        rel = xs_dict_append(rel, "id",                   md5);
        rel = xs_dict_append(rel, "following",
            following_check(snac, actor) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

        rel = xs_dict_append(rel, "showing_reblogs",      xs_stock(XSTYPE_TRUE));
        rel = xs_dict_append(rel, "notifying",            xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "followed_by",
            follower_check(snac, actor) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

        rel = xs_dict_append(rel, "blocking",
            is_muted(snac, actor) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

        rel = xs_dict_append(rel, "muting",               xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "muting_notifications", xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "requested",            xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "domain_blocking",      xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "endorsed",             xs_stock(XSTYPE_FALSE));
        rel = xs_dict_append(rel, "note",                 "");
    }

    return rel;
}


int process_auth_token(snac *snac, const xs_dict *req)
/* processes an authorization token, if there is one */
{
    int logged_in = 0;
    const char *v;

    /* if there is an authorization field, try to validate it */
    if (!xs_is_null(v = xs_dict_get(req, "authorization")) && xs_startswith(v, "Bearer ")) {
        xs *tokid = xs_replace_n(v, "Bearer ", "", 1);
        xs *token = token_get(tokid);

        if (token != NULL) {
            const char *uid = xs_dict_get(token, "uid");

            if (!xs_is_null(uid) && user_open(snac, uid)) {
                logged_in = 1;

                /* this counts as a 'login' */
                lastlog_write(snac, "mastoapi");

                srv_debug(2, xs_fmt("mastoapi auth: valid token for user '%s'", uid));
            }
            else
                srv_log(xs_fmt("mastoapi auth: corrupted token '%s'", tokid));
        }
        else
            srv_log(xs_fmt("mastoapi auth: invalid token '%s'", tokid));
    }

    return logged_in;
}


void credentials_get(char **body, char **ctype, int *status, snac snac)
{
    xs *acct = xs_dict_new();

    const xs_val *bot = xs_dict_get(snac.config, "bot");

    acct = xs_dict_append(acct, "id", snac.md5);
    acct = xs_dict_append(acct, "username", xs_dict_get(snac.config, "uid"));
    acct = xs_dict_append(acct, "acct", xs_dict_get(snac.config, "uid"));
    acct = xs_dict_append(acct, "display_name", xs_dict_get(snac.config, "name"));
    acct = xs_dict_append(acct, "created_at", xs_dict_get(snac.config, "published"));
    acct = xs_dict_append(acct, "last_status_at", xs_dict_get(snac.config, "published"));
    acct = xs_dict_append(acct, "note", xs_dict_get(snac.config, "bio"));
    acct = xs_dict_append(acct, "url", snac.actor);
    acct = xs_dict_append(acct, "uri", snac.actor);

    acct = xs_dict_append(acct, "locked",
        xs_stock(xs_is_true(xs_dict_get(snac.config, "approve_followers")) ? XSTYPE_TRUE : XSTYPE_FALSE));

    acct = xs_dict_append(acct, "bot", xs_stock(xs_is_true(bot) ? XSTYPE_TRUE : XSTYPE_FALSE));
    acct = xs_dict_append(acct, "emojis", xs_stock(XSTYPE_LIST));

    xs *src = xs_json_loads("{\"privacy\":\"public\", \"language\":\"en\","
        "\"follow_requests_count\": 0,"
        "\"sensitive\":false,\"fields\":[],\"note\":\"\"}");
    /* some apps take the note from the source object */
    src = xs_dict_set(src, "note", xs_dict_get(snac.config, "bio"));
    src = xs_dict_set(src, "privacy", xs_type(xs_dict_get(snac.config, "private")) == XSTYPE_TRUE ? "private" : "public");

    const xs_str *cw = xs_dict_get(snac.config, "cw");
    src = xs_dict_set(src, "sensitive",
        strcmp(cw, "open") == 0 ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));

    src = xs_dict_set(src, "bot", xs_stock(xs_is_true(bot) ? XSTYPE_TRUE : XSTYPE_FALSE));

    xs *avatar = NULL;
    const char *av = xs_dict_get(snac.config, "avatar");

    if (xs_is_null(av) || *av == '\0')
        avatar = xs_fmt("%s/susie.png", srv_baseurl);
    else
        avatar = xs_dup(av);

    acct = xs_dict_append(acct, "avatar", avatar);
    acct = xs_dict_append(acct, "avatar_static", avatar);

    xs *header = NULL;
    const char *hd = xs_dict_get(snac.config, "header");

    if (!xs_is_null(hd))
        header = xs_dup(hd);
    else
        header = xs_str_new(NULL);

    acct = xs_dict_append(acct, "header", header);
    acct = xs_dict_append(acct, "header_static", header);

    xs *metadata = NULL;
    const xs_dict *md = xs_dict_get(snac.config, "metadata");

    if (xs_is_dict(md))
        metadata = xs_dup(md);
    else
    if (xs_is_string(md)) {
        metadata = xs_dict_new();
        xs *l = xs_split(md, "\n");
        const char *ll;

        xs_list_foreach(l, ll) {
            xs *kv = xs_split_n(ll, "=", 1);
            const char *k = xs_list_get(kv, 0);
            const char *v = xs_list_get(kv, 1);

            if (k && v) {
                xs *kk = xs_strip_i(xs_dup(k));
                xs *vv = xs_strip_i(xs_dup(v));
                metadata = xs_dict_set(metadata, kk, vv);
            }
        }
    }

    if (xs_is_dict(metadata)) {
        xs *fields = xs_list_new();
        const xs_str *k;
        const xs_str *v;

        xs_dict *val_links = snac.links;
        if (xs_is_null(val_links))
            val_links = xs_stock(XSTYPE_DICT);

        int c = 0;
        while (xs_dict_next(metadata, &k, &v, &c)) {
            xs *val_date = NULL;

            const xs_number *verified_time = xs_dict_get(val_links, v);
            if (xs_type(verified_time) == XSTYPE_NUMBER) {
                time_t t = xs_number_get(verified_time);

                if (t > 0)
                    val_date = xs_str_utctime(t, ISO_DATE_SPEC);
            }

            xs *d = xs_dict_new();

            d = xs_dict_append(d, "name", k);
            d = xs_dict_append(d, "value", v);
            d = xs_dict_append(d, "verified_at",
                               xs_type(val_date) == XSTYPE_STRING && *val_date ? val_date : xs_stock(XSTYPE_NULL));

            fields = xs_list_append(fields, d);
        }

        acct = xs_dict_set(acct, "fields", fields);
        /* some apps take the fields from the source object */
        src = xs_dict_set(src, "fields", fields);
    }

    acct = xs_dict_append(acct, "source", src);
    acct = xs_dict_append(acct, "followers_count", xs_stock(0));
    acct = xs_dict_append(acct, "following_count", xs_stock(0));
    acct = xs_dict_append(acct, "statuses_count", xs_stock(0));

    /* does this user want to publish their contact metrics? */
    if (xs_is_true(xs_dict_get(snac.config, "show_contact_metrics"))) {
        int fwing = following_list_len(&snac);
        int fwers = follower_list_len(&snac);
        xs *ni = xs_number_new(fwing);
        xs *ne = xs_number_new(fwers);

        acct = xs_dict_append(acct, "followers_count", ne);
        acct = xs_dict_append(acct, "following_count", ni);
    }

    *body = xs_json_dumps(acct, 4);
    *ctype = "application/json";
    *status = HTTP_STATUS_OK;
}


xs_list *mastoapi_timeline(snac *user, const xs_dict *args, const char *index_fn)
{
    xs_list *out = xs_list_new();
    FILE *f;
    char md5[MD5_HEX_SIZE];

    if (dbglevel) {
        xs *js = xs_json_dumps(args, 0);
        srv_debug(1, xs_fmt("mastoapi_timeline args %s", js));
    }

    if ((f = fopen(index_fn, "r")) == NULL)
        return out;

    const char *o_max_id   = xs_dict_get(args, "max_id");
    const char *o_since_id = xs_dict_get(args, "since_id");
    const char *o_min_id   = xs_dict_get(args, "min_id"); /* unsupported old-to-new navigation */
    const char *limit_s  = xs_dict_get(args, "limit");
    int (*iterator)(FILE *, char *);
    int initial_status = 0;
    int ascending = 0;
    int limit = 0;
    int cnt   = 0;

    xs *max_id   = o_max_id ? xs_tolower_i(xs_dup(o_max_id)) : NULL;
    xs *since_id = o_since_id ? xs_tolower_i(xs_dup(o_since_id)) : NULL;
    xs *min_id   = o_min_id ? xs_tolower_i(xs_dup(o_min_id)) : NULL;

    if (!xs_is_null(limit_s))
        limit = atoi(limit_s);

    if (limit == 0)
        limit = 20;

    if (min_id) {
        iterator = &index_asc_next;
        initial_status = index_asc_first(f, md5, MID_TO_MD5(min_id));
        ascending = 1;
    }
    else {
        iterator = &index_desc_next;
        initial_status = index_desc_first(f, md5, 0);
    }

    xs_set entries;
    xs_set_init(&entries);

    if (initial_status) {
        do {
            xs *msg = NULL;

            /* only return entries older that max_id */
            if (max_id) {
                if (strcmp(md5, MID_TO_MD5(max_id)) == 0) {
                    max_id = xs_free(max_id);
                    if (ascending)
                        break;
                }
                if (!ascending)
                    continue;
            }

            /* only returns entries newer than since_id */
            if (since_id) {
                if (strcmp(md5, MID_TO_MD5(since_id)) == 0) {
                    if (!ascending)
                        break;
                    since_id = xs_free(since_id);
                }
                if (ascending)
                    continue;
            }

            /* get the entry */
            if (user) {
                if (!valid_status(timeline_get_by_md5(user, md5, &msg)))
                    continue;
            }
            else {
                if (!valid_status(object_get_by_md5(md5, &msg)))
                    continue;
            }

            /* discard non-Notes */
            const char *id   = xs_dict_get(msg, "id");
            const char *type = xs_dict_get(msg, "type");
            if (!xs_match(type, POSTLIKE_OBJECT_TYPE))
                continue;

            if (id && is_instance_blocked(id))
                continue;

            const char *from = NULL;
            if (strcmp(type, "Page") == 0)
                from = xs_dict_get(msg, "audience");

            if (from == NULL)
                from = get_atto(msg);

            if (from == NULL)
                continue;

            if (user) {
                /* is this message from a person we don't follow? */
                if (strcmp(from, user->actor) && !following_check(user, from)) {
                    /* discard if it was not boosted */
                    xs *idx = object_announces(id);

                    if (xs_list_len(idx) == 0)
                        continue;
                }

                /* discard notes from muted morons */
                if (is_muted(user, from))
                    continue;

                /* discard hidden notes */
                if (is_hidden(user, id))
                    continue;

                /* muted words? */
                if (words_in_content(xs_dict_get(user->config, "muted_words"),
                                     xs_dict_get(msg, "content")))
                    continue;

                if (blocked_hashtag_check(user, msg))
                    continue;
            }
            else {
                /* skip non-public messages */
                if (!is_msg_public(msg))
                    continue;

                /* discard messages from private users */
                if (is_msg_from_private_user(msg))
                    continue;
            }

            /* if it has a name and it's not an object that may have one,
               it's a poll vote, so discard it */
            if (!xs_is_null(xs_dict_get(msg, "name")) && !xs_match(type, "Page|Video|Audio|Event"))
                continue;

            /* convert the Note into a Mastodon status */
            xs *st = mastoapi_status(user, msg);

            if (st != NULL && xs_set_add(&entries, md5) == 1) {
                if (ascending)
                    out = xs_list_insert(out, 0, st);
                else
                    out = xs_list_append(out, st);
                cnt++;
            }

        } while ((cnt < limit) && (*iterator)(f, md5));
    }

    xs_set_free(&entries);

    int more = index_desc_next(f, md5);

    fclose(f);

    srv_debug(1, xs_fmt("mastoapi_timeline ret %d%s", cnt, more ? " (+)" : ""));

    return out;
}


xs_str *timeline_link_header(const char *endpoint, xs_list *timeline)
/* returns a Link header with paging information */
{
    xs_str *s = NULL;

    if (xs_list_len(timeline) == 0)
        return NULL;

    const xs_dict *first_st = xs_list_get(timeline, 0);
    const xs_dict *last_st  = xs_list_get(timeline, -1);
    const char *first_id    = xs_dict_get(first_st, "id");
    const char *last_id     = xs_dict_get(last_st, "id");
    const char *host        = xs_dict_get(srv_config, "host");
    const char *protocol    = xs_dict_get_def(srv_config, "protocol", "https");

    s = xs_fmt(
        "<%s:/" "/%s%s?max_id=%s>; rel=\"next\", "
        "<%s:/" "/%s%s?since_id=%s>; rel=\"prev\"",
        protocol, host, endpoint, last_id,
        protocol, host, endpoint, first_id);

    srv_debug(1, xs_fmt("timeline_link_header %s", s));

    return s;
}


xs_list *mastoapi_account_lists(snac *user, const char *uid)
/* returns the list of list an user is in */
{
    xs_list *out  = xs_list_new();
    xs *actor_md5 = NULL;
    xs *lol       = list_maint(user, NULL, OP_LIST);

    if (uid) {
        if (!xs_is_hex(uid))
            actor_md5 = xs_md5_hex(uid, strlen(uid));
        else
            actor_md5 = xs_dup(uid);
    }

    const xs_list *li;
    xs_list_foreach(lol, li) {
        const char *list_id    = xs_list_get(li, 0);
        const char *list_title = xs_list_get(li, 1);
        if (uid) {
            xs *users = list_members(user, list_id, NULL, OP_LIST);
            if (xs_list_in(users, actor_md5) == -1)
                continue;
        }

        xs *d = xs_dict_new();

        d = xs_dict_append(d, "id", list_id);
        d = xs_dict_append(d, "title", list_title);
        d = xs_dict_append(d, "replies_policy", "list");
        d = xs_dict_append(d, "exclusive", xs_stock(XSTYPE_FALSE));

        out = xs_list_append(out, d);
    }

    return out;
}


xs_list *build_childrens(const xs_dict *msg, snac *snac1) {
    xs_list *ret = xs_list_new();
    xs *children = object_children(xs_dict_get(msg, "id"));
    char *p = children;
    const xs_str *v;

    while (xs_list_iter(&p, &v)) {
        xs *m2 = NULL;

        if (valid_status(timeline_get_by_md5(snac1, v, &m2))) {
            if (xs_is_null(xs_dict_get(m2, "name"))) {
                xs *st = mastoapi_status(snac1, m2);

                if (st) {
                    /* childrens children */
                    xs *childs = build_childrens(m2, snac1);
                    ret = xs_list_append(ret, st);
                    if (xs_list_len(childs)) {
                        char *p2 = childs;
                        while (xs_list_iter(&p2, &v))
                            ret = xs_list_append(ret, v);

                    }
                }
            }
        }
    }
    return ret;
}


int mastoapi_get_handler(const xs_dict *req, const char *q_path,
                         char **body, int *b_size, char **ctype, xs_str **link)
{
    (void)b_size;

    if (!xs_startswith(q_path, "/api/v1/") && !xs_startswith(q_path, "/api/v2/"))
        return 0;

    int status    = HTTP_STATUS_NOT_FOUND;
    const xs_dict *args = xs_dict_get(req, "q_vars");
    xs *cmd       = xs_replace_n(q_path, "/api", "", 1);

    snac snac1 = {0};
    int logged_in = process_auth_token(&snac1, req);

    if (strcmp(cmd, "/v1/accounts/verify_credentials") == 0) { /** **/
        if (logged_in) {
            credentials_get(body, ctype, &status, snac1);
        }
        else {
            status = HTTP_STATUS_UNPROCESSABLE_CONTENT; // (no login)
        }
    }
    else
    if (strcmp(cmd, "/v1/accounts/relationships") == 0) { /** **/
        /* find if an account is followed, blocked, etc. */
        /* the account to get relationships about is in args "id[]" */

        if (logged_in) {
            xs *res         = xs_list_new();
            const char *md5 = xs_dict_get(args, "id[]");

            if (xs_is_null(md5))
                md5 = xs_dict_get(args, "id");

            if (!xs_is_null(md5)) {
                if (xs_type(md5) == XSTYPE_LIST)
                    md5 = xs_list_get(md5, 0);

                xs *rel = mastoapi_relationship(&snac1, md5);

                if (rel != NULL)
                    res = xs_list_append(res, rel);
            }

            *body  = xs_json_dumps(res, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
    }
    else
    if (strcmp(cmd, "/v1/accounts/lookup") == 0) { /** **/
        /* lookup an account */
        const char *acct = xs_dict_get(args, "acct");

        if (!xs_is_null(acct)) {
            xs *s = xs_strip_chars_i(xs_dup(acct), "@");
            xs *l = xs_split_n(s, "@", 1);
            const char *uid = xs_list_get(l, 0);
            const char *host = xs_list_get(l, 1);

            if (uid && (!host || strcmp(host, xs_dict_get(srv_config, "host")) == 0)) {
                snac user;

                if (user_open(&user, uid)) {
                    xs *actor = msg_actor(&user);
                    xs *macct = mastoapi_account(NULL, actor);

                    *body  = xs_json_dumps(macct, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;

                    user_free(&user);
                }
            }
        }
    }
    else
    if (xs_startswith(cmd, "/v1/accounts/")) { /** **/
        /* account-related information */
        xs *l = xs_split(cmd, "/");
        const char *uid = xs_list_get(l, 3);
        const char *opt = xs_list_get(l, 4);

        if (uid != NULL) {
            snac snac2;
            xs *out   = NULL;
            xs *actor = NULL;

            if (logged_in && strcmp(uid, "familiar_followers") == 0) { /** **/
                /* familiar followers endpoint - return empty array */
                out = xs_list_new();
            }
            else
            if (logged_in && strcmp(uid, "search") == 0) { /** **/
                /* search for accounts starting with q */
                const char *aq = xs_dict_get(args, "q");

                if (!xs_is_null(aq)) {
                    xs *q    = xs_utf8_to_lower(aq);
                    out      = xs_list_new();
                    xs *wing = following_list(&snac1);
                    xs *wers = follower_list(&snac1);
                    xs *ulst = user_list();
                    xs_list *p;
                    const xs_str *v;
                    xs_set seen;

                    xs_set_init(&seen);

                    /* user relations */
                    xs_list *lsts[] = { wing, wers, NULL };
                    int n;
                    for (n = 0; (p = lsts[n]) != NULL; n++) {

                        while (xs_list_iter(&p, &v)) {
                            /* already seen? skip */
                            if (xs_set_add(&seen, v) == 0)
                                continue;

                            xs *actor = NULL;

                            if (valid_status(object_get(v, &actor))) {
                                const char *uname = xs_dict_get(actor, "preferredUsername");

                                if (!xs_is_null(uname)) {
                                    xs *luname = xs_tolower_i(xs_dup(uname));

                                    if (xs_startswith(luname, q)) {
                                        xs *acct = mastoapi_account(&snac1, actor);

                                        out = xs_list_append(out, acct);
                                    }
                                }
                            }
                        }
                    }

                    /* local users */
                    p = ulst;
                    while (xs_list_iter(&p, &v)) {
                        snac user;

                        /* skip this same user */
                        if (strcmp(v, xs_dict_get(snac1.config, "uid")) == 0)
                            continue;

                        /* skip if the uid does not start with the query */
                        xs *v2 = xs_tolower_i(xs_dup(v));
                        if (!xs_startswith(v2, q))
                            continue;

                        if (user_open(&user, v)) {
                            /* if it's not already seen, add it */
                            if (xs_set_add(&seen, user.actor) == 1) {
                                xs *actor = msg_actor(&user);
                                xs *acct  = mastoapi_account(&snac1, actor);

                                out = xs_list_append(out, acct);
                            }

                            user_free(&user);
                        }
                    }

                    xs_set_free(&seen);
                }
            }
            else
            /* is it a local user? */
            if (user_open(&snac2, uid) || user_open_by_md5(&snac2, uid)) {
                if (opt == NULL) {
                    /* account information */
                    actor = msg_actor(&snac2);
                    out   = mastoapi_account(NULL, actor);
                }
                else
                if (strcmp(opt, "statuses") == 0) { /** **/
                    if (logged_in || xs_type(xs_dict_get(snac2.config, "private")) == XSTYPE_FALSE) {
                        /* the public list of posts of a user */
                        const char *limit_s  = xs_dict_get(args, "limit");
                        const char *o_max_id = xs_dict_get(args, "max_id");
                        int limit = limit_s ? atoi(limit_s) : 20;
                        xs *max_id = o_max_id ? xs_tolower_i(xs_dup(o_max_id)) : NULL;

                        srv_debug(1, xs_fmt("account statuses: max_id=%s limit=%d", max_id ? max_id : "(null)", limit));

                        xs *timeline = timeline_simple_list(&snac2, "public", 0, 256, NULL);
                        xs_list *p   = timeline;
                        const xs_str *v;
                        xs_set seen;
                        int cnt = 0;
                        int skip_until_max = max_id != NULL;

                        out = xs_list_new();
                        xs_set_init(&seen);

                        while (xs_list_iter(&p, &v) && cnt < limit) {
                            xs *msg = NULL;

                            if (valid_status(timeline_get_by_md5(&snac2, v, &msg))) {
                                const char *msg_id = xs_dict_get(msg, "id");

                                /* add only posts by the author */
                                if (!xs_is_null(msg_id) &&
                                    strcmp(xs_dict_get(msg, "type"), "Note") == 0 &&
                                    is_msg_mine(&snac2, xs_dict_get(msg, "id")) && is_msg_public(msg)) {

                                    /* if max_id is set, skip entries until we find it */
                                    if (skip_until_max) {
                                        xs *mid = mastoapi_id(msg);
                                        if (strcmp(mid, max_id) == 0) {
                                            skip_until_max = 0;
                                            srv_debug(2, xs_fmt("account statuses: found max_id, starting from next post"));
                                        }
                                        continue;
                                    }

                                    /* deduplicate by message id */
                                    if (xs_set_add(&seen, msg_id) == 1) {
                                        xs *st = mastoapi_status(&snac2, msg);

                                        if (st) {
                                            out = xs_list_append(out, st);
                                            cnt++;
                                        }
                                    }
                                }
                            }
                        }

                        srv_debug(1, xs_fmt("account statuses: returning %d posts (requested %d)", cnt, limit));
                        xs_set_free(&seen);
                    }
                    else
                        status = HTTP_STATUS_UNAUTHORIZED;
                }
                else
                if (strcmp(opt, "featured_tags") == 0) {
                    /* snac doesn't have features tags, yet? */
                    /* implement empty response so apps like Tokodon don't show an error */
                    out = xs_list_new();
                }
                else
                if (strcmp(opt, "following") == 0) {
                    xs *wing = following_list(&snac1);
                    out = xs_list_new();
                    int c = 0;
                    const char *v;

                    while (xs_list_next(wing, &v, &c)) {
                        xs *actor = NULL;

                        if (valid_status(object_get(v, &actor))) {
                            xs *acct = mastoapi_account(NULL, actor);
                            out = xs_list_append(out, acct);
                        }
                    }
                }
                else
                if (strcmp(opt, "followers") == 0) {
                    out = xs_list_new();
                }
                else
                if (strcmp(opt, "lists") == 0) {
                    out = mastoapi_account_lists(&snac1, uid);
                }
                else
                if (strcmp(opt, "familiar_followers") == 0) {
                    /* familiar followers - not implemented, return empty array */
                    out = xs_list_new();
                }

                user_free(&snac2);
            }
            else {
                /* try the uid as the md5 of a possibly loaded actor */
                if (logged_in && valid_status(object_get_by_md5(uid, &actor))) {
                    if (opt == NULL) {
                        /* account information */
                        out = mastoapi_account(&snac1, actor);
                    }
                    else
                    if (strcmp(opt, "statuses") == 0) {
                        /* fetch statuses from remote outbox */
                        out = xs_list_new();
                        const char *outbox_url = xs_dict_get(actor, "outbox");

                        if (!xs_is_null(outbox_url)) {
                            /* extract query parameters */
                            const char *limit_s = xs_dict_get(args, "limit");
                            const char *exclude_replies_s = xs_dict_get(args, "exclude_replies");
                            const char *o_max_id = xs_dict_get(args, "max_id");

                            int limit = 20;
                            if (!xs_is_null(limit_s))
                                limit = atoi(limit_s);
                            if (limit == 0 || limit > 40)
                                limit = 20;

                            int exclude_replies = !xs_is_null(exclude_replies_s) &&
                                                 strcmp(exclude_replies_s, "true") == 0;

                            xs *max_id = o_max_id ? xs_tolower_i(xs_dup(o_max_id)) : NULL;
                            int skip_until_max = max_id != NULL;

                            srv_debug(1, xs_fmt("remote account statuses: fetching from %s (max_id=%s limit=%d)",
                                               outbox_url, max_id ? max_id : "(null)", limit));

                            /* fetch first page only - safer for memory on large instances */
                            xs *outbox_collection = NULL;
                            xs *first_page = NULL;
                            const xs_list *items = get_collection_items(&snac1, outbox_url,
                                                                        &outbox_collection, &first_page);

                            int count = 0;
                            int processed = 0;

                            if (!xs_is_null(items) && xs_type(items) == XSTYPE_LIST) {
                                int total_items = xs_list_len(items);
                                srv_debug(1, xs_fmt("remote account statuses: got %d items from outbox", total_items));

                                const xs_val *item;

                                xs_list_foreach(items, item) {
                                    processed++;

                                    if (count >= limit)
                                        break;

                                    const xs_dict *post = extract_post_from_item(item);
                                    if (!post)
                                        continue;

                                    const char *post_type = xs_dict_get(post, "type");
                                    const char *in_reply_to = xs_dict_get(post, "inReplyTo");

                                    /* apply filters */
                                    if (exclude_replies && !xs_is_null(in_reply_to))
                                        continue;

                                    if (is_valid_post_type(post_type)) {
                                        /* store object locally so mastoapi_id() can generate valid IDs */
                                        const char *post_id = xs_dict_get(post, "id");
                                        if (!xs_is_null(post_id))
                                            object_add(post_id, post);

                                        /* handle pagination with max_id */
                                        if (skip_until_max) {
                                            xs *mid = mastoapi_id(post);
                                            if (!xs_is_null(mid) && strcmp(mid, max_id) == 0) {
                                                skip_until_max = 0;
                                                srv_debug(2, xs_fmt("remote account statuses: found max_id at position %d", processed));
                                            }
                                            continue;
                                        }

                                        /* pass logged-in user context to enable media proxying if configured */
                                        xs *st = mastoapi_status(&snac1, post);
                                        if (st) {
                                            out = xs_list_append(out, st);
                                            count++;
                                        }
                                    }
                                }
                            }
                            else {
                                srv_debug(1, xs_fmt("remote account statuses: no items found in outbox"));
                            }

                            srv_debug(1, xs_fmt("remote account statuses: processed %d items, returning %d posts (requested %d)",
                                               processed, count, limit));
                        }
                    }
                    else
                    if (strcmp(opt, "featured_tags") == 0) {
                        /* snac doesn't have features tags, yet? */
                        /* implement empty response so apps like Tokodon don't show an error */
                        out = xs_list_new();
                    }
                    else
                    if (strcmp(opt, "lists") == 0) {
                        out = mastoapi_account_lists(&snac1, uid);
                    }
                    else
                    if (strcmp(opt, "familiar_followers") == 0) {
                        /* familiar followers - not implemented, return empty array */
                        out = xs_list_new();
                    }
                }
            }

            if (out != NULL) {
                *body  = xs_json_dumps(out, 4);
                *ctype = "application/json";
                status = HTTP_STATUS_OK;
            }
        }
    }
    else
    if (strcmp(cmd, "/v1/timelines/home") == 0) { /** **/
        /* the private timeline */
        if (logged_in) {
            xs *ifn = user_index_fn(&snac1, "private");
            xs *out = mastoapi_timeline(&snac1, args, ifn);

            *link = timeline_link_header("/api/v1/timelines/home", out);

            *body  = xs_json_dumps(out, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;

            srv_debug(2, xs_fmt("mastoapi timeline: returned %d entries", xs_list_len(out)));
        }
        else {
            status = HTTP_STATUS_UNAUTHORIZED;
        }
    }
    else
    if (strcmp(cmd, "/v1/timelines/public") == 0) { /** **/
        /* the instance public timeline (public timelines for all users) */
        xs *ifn = instance_index_fn();
        xs *out = mastoapi_timeline(NULL, args, ifn);

        *body  = xs_json_dumps(out, 4);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (xs_startswith(cmd, "/v1/timelines/tag/")) { /** **/
        /* get the tag */
        xs *l = xs_split(cmd, "/");
        const char *tag = xs_list_get(l, -1);

        xs *ifn = tag_fn(tag);
        xs *out = mastoapi_timeline(NULL, args, ifn);

        *body  = xs_json_dumps(out, 4);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (xs_startswith(cmd, "/v1/timelines/list/")) { /** **/
        /* get the list id */
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *list = xs_list_get(l, -1);

            xs *ifn = list_timeline_fn(&snac1, list);
            xs *out = mastoapi_timeline(NULL, args, ifn);

            *body  = xs_json_dumps(out, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_MISDIRECTED_REQUEST;
    }
    else
    if (strcmp(cmd, "/v1/conversations") == 0) { /** **/
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/notifications") == 0) { /** **/
        if (logged_in) {
            xs *l      = notify_list(&snac1, 0, 64);
            xs *out    = xs_list_new();
            const char *v;
            const xs_list *excl = xs_dict_get(args, "exclude_types[]");
            const xs_list *incl = xs_dict_get(args, "types[]");
            const char *min_id = xs_dict_get(args, "min_id");
            const char *max_id = xs_dict_get(args, "max_id");
            const char *limit = xs_dict_get(args, "limit");
            int limit_count = 0;
            if (xs_is_string(limit)) {
                limit_count = atoi(limit);
            }

            if (dbglevel) {
                xs *js = xs_json_dumps(args, 0);
                srv_debug(1, xs_fmt("mastoapi_notifications args %s", js));
            }

            xs_list_foreach(l, v) {
                xs *noti = notify_get(&snac1, v);

                if (noti == NULL)
                    continue;

                const xs_dict *tag = xs_list_get(xs_dict_get_path(noti, "msg.tag"), 0);

                const char *type  = xs_dict_get(noti, "type");
                const char *utype = xs_dict_get(noti, "utype");
                const char *objid = xs_dict_get(noti, "objid");
                const char *id    = xs_dict_get(noti, "id");
                const char *actid = xs_dict_get(noti, "actor");

                int isEmoji = 0;

                xs *fid = xs_replace(id, ".", "");
                xs *actor = NULL;
                xs *entry = NULL;

                if (tag) {
                    isEmoji = strcmp(xs_dict_get(tag, "type"), "Emoji") ? 0 : 1;
                }

                if (!valid_status(actor_get(actid, &actor)))
                    continue;

                if (objid != NULL && !valid_status(object_get(objid, &entry)))
                    continue;

                if (is_hidden(&snac1, objid))
                    continue;

                if (max_id) {
                    if (strcmp(fid, max_id) == 0)
                        max_id = NULL;

                    continue;
                }

                if (min_id) {
                    if (strcmp(fid, min_id) <= 0) {
                        continue;
                    }
                }

                /* convert the type */
                if (strcmp(type, "Like") == 0 && !isEmoji)
                    type = "favourite";
                else
                if (isEmoji || strcmp(type, "EmojiReact") == 0)
                    type = "reaction";
                else
                if (strcmp(type, "Announce") == 0)
                    type = "reblog";
                else
                if (strcmp(type, "Follow") == 0)
                    type = "follow";
                else
                if (strcmp(type, "Create") == 0) {
                    const xs_dict *obj = xs_dict_get_path(noti, "msg.object");
                    if (xs_is_dict(obj) && was_mentioned(&snac1, obj))
                        type = "mention";
                    else
                        type = "status";
                }
                else
                if (strcmp(type, "Update") == 0 && strcmp(utype, "Question") == 0)
                    type = "poll";
                else
                    continue;

                /* excluded type? */
                if (xs_is_list(excl) && xs_list_in(excl, type) != -1)
                    continue;

                /* included type? */
                if (xs_is_list(incl) && xs_list_in(incl, type) == -1)
                    continue;

                xs *mn = xs_dict_new();

                mn = xs_dict_append(mn, "type", type);

                mn = xs_dict_append(mn, "id", fid);

                mn = xs_dict_append(mn, "created_at", xs_dict_get(noti, "date"));

                xs *acct = mastoapi_account(&snac1, actor);

                if (acct == NULL)
                    continue;

                mn = xs_dict_append(mn, "account", acct);

                if (strcmp(type, "follow") != 0 && !xs_is_null(objid)) {
                    xs *st = mastoapi_status(&snac1, entry);

                    if (st) {
                        mn = xs_dict_append(mn, "status", st);

                        if (strcmp(type, "reaction") == 0 && !xs_is_null(objid)) {
                            const char *eid = NULL;
                            const char *url = NULL;
                            int utf = 0;

                            const xs_dict *tag = xs_list_get(xs_dict_get_path(noti, "msg.tag"), 0);
                            const char *content = xs_dict_get_path(noti, "msg.content");

                            url = xs_dict_get(xs_dict_get(tag, "icon"), "url");
                            eid = xs_dict_get(tag, "name");

                            if (eid && url) {
                                mn = xs_dict_append(mn, "emoji", eid);
                                mn = xs_dict_append(mn, "emoji_url", url);
                            }

                            if (xs_is_emoji((utf = xs_utf8_dec(&content)))) {
                                xs *s1 = xs_fmt("&#%d;", utf);
                                mn = xs_dict_append(mn, "name", s1);
                            }
                        }
                    }
                }

                out = xs_list_append(out, mn);

                if (--limit_count <= 0)
                    break;
            }

            srv_debug(1, xs_fmt("mastoapi_notifications count %d", xs_list_len(out)));

            *body  = xs_json_dumps(out, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/filters") == 0) { /** **/
        /* snac will never have filters */
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v2/filters") == 0) { /** **/
        /* snac will never have filters
         * but still, without a v2 endpoint a short delay is introduced
         * in some apps */
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/favourites") == 0) { /** **/
        /* snac will never support a list of favourites */
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/bookmarks") == 0) { /** **/
        if (logged_in) {
            xs *ifn = bookmark_index_fn(&snac1);
            xs *out = mastoapi_timeline(&snac1, args, ifn);

            *body  = xs_json_dumps(out, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/lists") == 0) { /** list of lists **/
        if (logged_in) {
            xs *l  = mastoapi_account_lists(&snac1, NULL);

            *body  = xs_json_dumps(l, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/lists/")) { /** list information **/
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *p = xs_list_get(l, -1);

            if (p) {
                if (strcmp(p, "accounts") == 0) {
                    p = xs_list_get(l, -2);

                    if (p && xs_is_hex(p)) {
                        xs *actors = list_members(&snac1, p, NULL, OP_LIST);
                        xs *out = xs_list_new();
                        int c = 0;
                        const char *v;

                        while (xs_list_next(actors, &v, &c)) {
                            xs *actor = NULL;

                            if (valid_status(object_get_by_md5(v, &actor))) {
                                xs *acct = mastoapi_account(&snac1, actor);
                                out = xs_list_append(out, acct);
                            }
                        }

                        *body  = xs_json_dumps(out, 4);
                        *ctype = "application/json";
                        status = HTTP_STATUS_OK;
                    }
                }
                else
                if (xs_is_hex(p)) {
                    xs *out = xs_list_new();
                    xs *lol = list_maint(&snac1, NULL, OP_LIST);
                    int c = 0;
                    const xs_list *v;

                    while (xs_list_next(lol, &v, &c)) {
                        const char *id = xs_list_get(v, 0);

                        if (id && strcmp(id, p) == 0) {
                            xs *d = xs_dict_new();

                            d = xs_dict_append(d, "id", p);
                            d = xs_dict_append(d, "title", xs_list_get(v, 1));
                            d = xs_dict_append(d, "replies_policy", "list");
                            d = xs_dict_append(d, "exclusive", xs_stock(XSTYPE_FALSE));

                            out = xs_dup(d);
                            break;
                        }
                    }

                    *body  = xs_json_dumps(out, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/scheduled_statuses") == 0) { /** **/
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/follow_requests") == 0) { /** **/
        if (logged_in) {
            xs *pend = pending_list(&snac1);
            xs *resp = xs_list_new();
            const char *id;

            xs_list_foreach(pend, id) {
                xs *actor = NULL;

                if (valid_status(object_get(id, &actor))) {
                    xs *acct = mastoapi_account(&snac1, actor);

                    if (acct)
                        resp = xs_list_append(resp, acct);
                }
            }

            *body  = xs_json_dumps(resp, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
    }
    else
    if (strcmp(cmd, "/v1/announcements") == 0) { /** **/
        if (logged_in) {
            xs *resp = xs_list_new();
            double la = 0.0;
            xs *user_la = xs_dup(xs_dict_get(snac1.config, "last_announcement"));
            if (user_la != NULL)
                la = xs_number_get(user_la);
            xs *val_date = xs_str_utctime(la, ISO_DATE_SPEC);

            /* contrary to html, we always send the announcement and set the read flag instead */

            const t_announcement *annce = announcement(la);
            if (annce != NULL && annce->text != NULL) {
                xs *an = xs_dict_new();
                xs *id = xs_fmt("%d", annce->timestamp);
                xs *ct = xs_fmt("<p>%s</p>", annce->text);

                an = xs_dict_set(an, "id",           id);
                an = xs_dict_set(an, "content",      ct);
                an = xs_dict_set(an, "starts_at",    xs_stock(XSTYPE_NULL));
                an = xs_dict_set(an, "ends_at",      xs_stock(XSTYPE_NULL));
                an = xs_dict_set(an, "all_day",      xs_stock(XSTYPE_TRUE));
                an = xs_dict_set(an, "published_at", val_date);
                an = xs_dict_set(an, "updated_at",   val_date);
                an = xs_dict_set(an, "read",         (annce->timestamp >= la)
                    ? xs_stock(XSTYPE_FALSE) : xs_stock(XSTYPE_TRUE));
                an = xs_dict_set(an, "mentions",     xs_stock(XSTYPE_LIST));
                an = xs_dict_set(an, "statuses",     xs_stock(XSTYPE_LIST));
                an = xs_dict_set(an, "tags",         xs_stock(XSTYPE_LIST));
                an = xs_dict_set(an, "emojis",       xs_stock(XSTYPE_LIST));
                an = xs_dict_set(an, "reactions",    xs_stock(XSTYPE_LIST));
                resp = xs_list_append(resp, an);
            }

            *body  = xs_json_dumps(resp, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
    }
    else
    if (strcmp(cmd, "/v1/custom_emojis") == 0) { /** **/
        xs *emo = emojis();
        xs *list = xs_list_new();
        const xs_str *k;
        const xs_val *v;
        xs_dict_foreach(emo, k, v) {
            xs *current = xs_dict_new();
            if ((xs_startswith(v, "https://") && xs_startswith((xs_mime_by_ext(v)), "image/")) || xs_type(v) == XSTYPE_DICT) {
                /* remove first and last colon */
                if (xs_type(v) == XSTYPE_DICT) {
                    const char *v2;
                    const char *cat = k;
                    xs_dict_foreach(v, k, v2) {
                        xs *shortcode = xs_replace(k, ":", "");
                        current = xs_dict_append(current, "shortcode", shortcode);
                        current = xs_dict_append(current, "url", v2);
                        current = xs_dict_append(current, "static_url", v2);
                        current = xs_dict_append(current, "visible_in_picker", xs_stock(XSTYPE_TRUE));
                        current = xs_dict_append(current, "category", cat);
                        list = xs_list_append(list, current);
                    }
                }
                else {
                    xs *shortcode = xs_replace(k, ":", "");
                    current = xs_dict_append(current, "shortcode", shortcode);
                    current = xs_dict_append(current, "url", v);
                    current = xs_dict_append(current, "static_url", v);
                    current = xs_dict_append(current, "visible_in_picker", xs_stock(XSTYPE_TRUE));
                    list = xs_list_append(list, current);
                }
            }
        }
        *body  = xs_json_dumps(list, 0);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (strcmp(cmd, "/v1/instance") == 0) { /** **/
        /* returns an instance object */
        xs *ins = xs_dict_new();
        const char *host  = xs_dict_get(srv_config, "host");
        const char *title = xs_dict_get(srv_config, "title");
        const char *sdesc = xs_dict_get(srv_config, "short_description");

        ins = xs_dict_append(ins, "uri",         host);
        ins = xs_dict_append(ins, "domain",      host);
        ins = xs_dict_append(ins, "title",       title && *title ? title : host);
        ins = xs_dict_append(ins, "version",     "4.0.0 (not true; really " USER_AGENT ")");
        ins = xs_dict_append(ins, "source_url",  WHAT_IS_SNAC_URL);
        ins = xs_dict_append(ins, "description", host);

        ins = xs_dict_append(ins, "short_description", sdesc && *sdesc ? sdesc : host);

        xs *susie = xs_fmt("%s/susie.png", srv_baseurl);
        ins = xs_dict_append(ins, "thumbnail", susie);

        const char *v = xs_dict_get(srv_config, "admin_email");
        if (xs_is_null(v) || *v == '\0')
            v = "admin@localhost";

        ins = xs_dict_append(ins, "email", v);

        ins = xs_dict_append(ins, "rules", xs_stock(XSTYPE_LIST));

        xs *l1 = xs_list_append(xs_list_new(), "en");
        ins = xs_dict_append(ins, "languages", l1);

        xs *wss = xs_fmt("wss:/" "/%s", xs_dict_get(srv_config, "host"));
        xs *urls = xs_dict_new();
        urls = xs_dict_append(urls, "streaming_api", wss);

        ins = xs_dict_append(ins, "urls", urls);

        xs *d2 = xs_dict_append(xs_dict_new(), "user_count", xs_stock(0));
        d2 = xs_dict_append(d2, "status_count", xs_stock(0));
        d2 = xs_dict_append(d2, "domain_count", xs_stock(0));
        ins = xs_dict_append(ins, "stats", d2);

        ins = xs_dict_append(ins, "registrations",     xs_stock(XSTYPE_FALSE));
        ins = xs_dict_append(ins, "approval_required", xs_stock(XSTYPE_FALSE));
        ins = xs_dict_append(ins, "invites_enabled",   xs_stock(XSTYPE_FALSE));

        xs *cfg = xs_dict_new();

        {
            xs *d11 = xs_json_loads("{\"characters_reserved_per_url\":32,"
                "\"max_characters\":100000,\"max_media_attachments\":4}");

            const xs_number *max_attachments = xs_dict_get(srv_config, "max_attachments");
            if (xs_type(max_attachments) == XSTYPE_NUMBER)
                d11 = xs_dict_set(d11, "max_media_attachments", max_attachments);

            cfg = xs_dict_append(cfg, "statuses", d11);

            xs *d12 = xs_json_loads("{\"max_featured_tags\":0}");
            cfg = xs_dict_append(cfg, "accounts", d12);

            xs *d13 = xs_json_loads("{\"image_matrix_limit\":33177600,"
                        "\"image_size_limit\":16777216,"
                        "\"video_frame_rate_limit\":120,"
                        "\"video_matrix_limit\":8294400,"
                        "\"video_size_limit\":103809024}"
            );

            {
                /* get the supported mime types from the internal list */
                const char **p = xs_mime_types;
                xs_set mtypes;
                xs_set_init(&mtypes);

                while (*p) {
                    const char *type = p[1];

                    if (xs_startswith(type, "image/") ||
                        xs_startswith(type, "video/") ||
                        xs_startswith(type, "audio/"))
                        xs_set_add(&mtypes, type);

                    p += 2;
                }

                xs *l = xs_set_result(&mtypes);
                d13 = xs_dict_append(d13, "supported_mime_types", l);
            }

            cfg = xs_dict_append(cfg, "media_attachments", d13);

            xs *d14 = xs_json_loads("{\"max_characters_per_option\":50,"
                "\"max_expiration\":2629746,"
                "\"max_options\":8,\"min_expiration\":300}");
            cfg = xs_dict_append(cfg, "polls", d14);


            xs *d15 = xs_json_loads("{\"max_reactions\":50}");
                cfg = xs_dict_append(cfg, "reactions", d15);

        }

        ins = xs_dict_append(ins, "configuration", cfg);

        const char *admin_account = xs_dict_get(srv_config, "admin_account");

        if (!xs_is_null(admin_account) && *admin_account) {
            snac admin;

            if (user_open(&admin, admin_account)) {
                xs *actor = msg_actor(&admin);
                xs *acct  = mastoapi_account(NULL, actor);

                ins = xs_dict_append(ins, "contact_account", acct);

                user_free(&admin);
            }
        }

        *body  = xs_json_dumps(ins, 4);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (strcmp(cmd, "/v1/instance/peers") == 0) { /** **/
        /* get the collected inbox list as the instances "this domain is aware of" */
        xs *list = inbox_list();
        xs *peers = xs_list_new();
        const char *inbox;

        xs_list_foreach(list, inbox) {
            xs *l = xs_split(inbox, "/");
            const char *domain = xs_list_get(l, 2);

            if (xs_is_string(domain))
                peers = xs_list_append(peers, domain);
        }

        *body  = xs_json_dumps(peers, 4);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (strcmp(cmd, "/v1/instance/extended_description") == 0) { /** **/
        xs *d = xs_dict_new();
        xs *greeting = xs_fmt("%s/greeting.html", srv_basedir);
        time_t t = mtime(greeting);
        xs *updated_at = xs_str_iso_date(t);
        xs *content = xs_replace(snac_blurb, "%host%", xs_dict_get(srv_config, "host"));

        d = xs_dict_set(d, "updated_at", updated_at);
        d = xs_dict_set(d, "content", content);

        *body  = xs_json_dumps(d, 4);
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (xs_startswith(cmd, "/v1/statuses/")) { /** **/
        /* information about a status */
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *oid = xs_list_get(l, 3);
            const char *op = xs_list_get(l, 4);

            if (!xs_is_null(oid)) {
                xs *msg = NULL;
                xs *out = NULL;

                /* skip the 'fake' part of the id */
                oid = MID_TO_MD5(oid);

                xs *id = xs_tolower_i(xs_dup(oid));

                if (valid_status(object_get_by_md5(id, &msg))) {
                    if (op == NULL) {
                        if (!is_muted(&snac1, get_atto(msg))) {
                            /* return the status itself */
                            out = mastoapi_status(&snac1, msg);
                        }
                    }
                    else
                    if (strcmp(op, "context") == 0) { /** **/
                        /* return ancestors and children */
                        xs *anc = xs_list_new();
                        xs *des = xs_list_new();
                        char pid[MD5_HEX_SIZE];

                        /* build the [grand]parent list, moving up */
                        strncpy(pid, id, sizeof(pid));

                        while (object_parent(pid, pid)) {
                            xs *m2 = NULL;

                            if (valid_status(timeline_get_by_md5(&snac1, pid, &m2))) {
                                xs *st = mastoapi_status(&snac1, m2);

                                if (st)
                                    anc = xs_list_insert(anc, 0, st);
                            }
                            else
                                break;
                        }

                        /* build the children list */
                        xs *childs = build_childrens(msg, &snac1);
                        if (xs_list_len(childs) > 0)
                            des = xs_list_cat(des, childs);

                        out = xs_dict_new();
                        out = xs_dict_append(out, "ancestors",   anc);
                        out = xs_dict_append(out, "descendants", des);
                    }
                    else
                    if (strcmp(op, "reblogged_by") == 0 || /** **/
                        strcmp(op, "favourited_by") == 0) { /** **/
                        /* return the list of people who liked or boosted this */
                        out = xs_list_new();

                        xs *l = NULL;

                        if (op[0] == 'r')
                            l = object_announces(xs_dict_get(msg, "id"));
                        else
                            l = object_likes(xs_dict_get(msg, "id"));

                        xs_list *p = l;
                        const xs_str *v;

                        while (xs_list_iter(&p, &v)) {
                            xs *actor2 = NULL;

                            if (valid_status(object_get_by_md5(v, &actor2))) {
                                xs *acct2 = mastoapi_account(&snac1, actor2);

                                out = xs_list_append(out, acct2);
                            }
                        }
                    }
                    else
                    if (strcmp(op, "source") == 0) { /** **/
                        out = xs_dict_new();

                        /* get the mastoapi status id */
                        out = xs_dict_append(out, "id", xs_list_get(l, 3));

                        out = xs_dict_append(out, "text", xs_dict_get(msg, "sourceContent"));
                        out = xs_dict_append(out, "spoiler_text", xs_dict_get(msg, "summary"));
                    }
                }
                else
                    srv_debug(1, xs_fmt("mastoapi status: bad id %s", id));

                if (out != NULL) {
                    *body  = xs_json_dumps(out, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/preferences") == 0) { /** **/
        /* TBD */
        if (logged_in) {
            *body  = xs_dup("{}");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/markers") == 0) { /** **/
        if (logged_in) {
            const xs_list *timeline = xs_dict_get(args, "timeline[]");
            xs_str *json = NULL;
            if (!xs_is_null(timeline))
                json = xs_json_dumps(markers_get(&snac1, timeline), 4);

            if (!xs_is_null(json))
                *body = json;
            else
                *body = xs_dup("{}");

            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/followed_tags") == 0) { /** **/
        if (logged_in) {
            xs *r = xs_list_new();
            const xs_list *followed_hashtags = xs_dict_get_def(snac1.config,
                        "followed_hashtags", xs_stock(XSTYPE_LIST));
            const char *hashtag;

            xs_list_foreach(followed_hashtags, hashtag) {
                if (*hashtag == '#') {
                    xs *d = xs_dict_new();
                    xs *s = xs_fmt("%s?t=%s", srv_baseurl, hashtag + 1);

                    d = xs_dict_set(d, "name", hashtag + 1);
                    d = xs_dict_set(d, "url", s);
                    d = xs_dict_set(d, "history", xs_stock(XSTYPE_LIST));

                    r = xs_list_append(r, d);
                }
            }

            *body  = xs_json_dumps(r, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/blocks") == 0) { /** **/
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/mutes") == 0) { /** **/
        if (logged_in) {
            *body  = xs_dup("[]");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/trends/tags") == 0) { /** **/
        *body  = xs_dup("[]");
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (strcmp(cmd, "/v1/trends/statuses") == 0) { /** **/
        *body  = xs_dup("[]");
        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (strcmp(cmd, "/v2/search") == 0) { /** **/
        if (logged_in) {
            const char *q      = xs_dict_get(args, "q");
            const char *type   = xs_dict_get(args, "type");
            const char *offset = xs_dict_get(args, "offset");

            xs *acl = xs_list_new();
            xs *stl = xs_list_new();
            xs *htl = xs_list_new();
            xs *res = xs_dict_new();

            if (xs_is_null(offset) || strcmp(offset, "0") == 0) {
                /* reply something only for offset 0; otherwise,
                   apps like Tusky keep asking again and again */
                if (xs_startswith(q, "https://")) {
                    if (!timeline_here(&snac1, q)) {
                        xs *object = NULL;
                        int status;

                        status = activitypub_request(&snac1, q, &object);
                        snac_debug(&snac1, 1, xs_fmt("Request searched URL %s %d", q, status));

                        if (valid_status(status)) {
                            /* got it; also request the actor */
                            const char *attr_to = get_atto(object);
                            xs *actor_obj = NULL;

                            if (!xs_is_null(attr_to)) {
                                status = actor_request(&snac1, attr_to, &actor_obj);

                                snac_debug(&snac1, 1, xs_fmt("Request author %s of %s %d", attr_to, q, status));

                                if (valid_status(status)) {
                                    /* add the actor */
                                    actor_add(attr_to, actor_obj);

                                    /* add the post to the timeline */
                                    timeline_add(&snac1, q, object);
                                }
                            }
                        }
                    }
                }

                if (!xs_is_null(q)) {
                    if (xs_is_null(type) || strcmp(type, "accounts") == 0) {
                        /* do a webfinger query */
                        char *actor = NULL;
                        char *user  = NULL;

                        if (valid_status(webfinger_request(q, &actor, &user)) && actor) {
                            xs *actor_o = NULL;

                            if (valid_status(actor_request(&snac1, actor, &actor_o))) {
                                xs *acct = mastoapi_account(NULL, actor_o);

                                acl = xs_list_append(acl, acct);

                                if (!object_here(actor))
                                    object_add(actor, actor_o);
                            }
                        }
                    }

                    if (xs_is_null(type) || strcmp(type, "hashtags") == 0) {
                        /* search this tag */
                        xs *tl = tag_search((char *)q, 0, 1);

                        if (xs_list_len(tl)) {
                            xs *d = xs_dict_new();

                            d = xs_dict_append(d, "name", q);
                            xs *url = xs_fmt("%s?t=%s", srv_baseurl, q);
                            d = xs_dict_append(d, "url", url);
                            d = xs_dict_append(d, "history", xs_stock(XSTYPE_LIST));

                            htl = xs_list_append(htl, d);
                        }
                    }

                    if (xs_is_null(type) || strcmp(type, "statuses") == 0) {
                        int to = 0;
                        int cnt = 40;
                        xs *tl = content_search(&snac1, q, 1, 0, cnt, 0, &to);
                        int c = 0;
                        const char *v;

                        while (xs_list_next(tl, &v, &c) && --cnt) {
                            xs *post = NULL;

                            if (!valid_status(timeline_get_by_md5(&snac1, v, &post)))
                                continue;

                            xs *s = mastoapi_status(&snac1, post);

                            if (!xs_is_null(s))
                                stl = xs_list_append(stl, s);
                        }
                    }
                }
            }

            res = xs_dict_append(res, "accounts", acl);
            res = xs_dict_append(res, "statuses", stl);
            res = xs_dict_append(res, "hashtags", htl);

            *body  = xs_json_dumps(res, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/media/") || xs_startswith(cmd, "/v2/media/")) { /** **/
        if (logged_in) {
            xs *p = xs_split(cmd, "/");
            const char *id = xs_list_get(p, -1);

            if (xs_is_string(id)) {
                xs *filename = xs_fmt("%s/static/%s", snac1.basedir, id);

                if (mtime(filename)) {
                    /* file exists */
                    xs *alt  = static_get_meta(&snac1, id);
                    xs *url  = xs_fmt("%s/s/%s", snac1.actor, id);
                    xs *mime = xs_split(xs_mime_by_ext(filename), "/");
                    const char *type = xs_list_get(mime, 0);

                    if (!xs_match(type, "image|video|audio"))
                        type = "unknown";

                    xs *d = xs_dict_new();

                    d = xs_dict_set(d, "id", id);
                    d = xs_dict_set(d, "url", url);
                    d = xs_dict_set(d, "preview_url", url);
                    d = xs_dict_set(d, "remote_url", url);
                    d = xs_dict_set(d, "type", type);
                    d = xs_dict_set(d, "description", xs_or(alt, ""));

                    *body = xs_json_dumps(d, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }

    /* user cleanup */
    if (logged_in)
        user_free(&snac1);

    srv_debug(1, xs_fmt("mastoapi_get_handler %s %d", q_path, status));

    return status;
}


int mastoapi_post_handler(const xs_dict *req, const char *q_path,
                          const char *payload, int p_size,
                          char **body, int *b_size, char **ctype)
{
    (void)p_size;
    (void)b_size;

    if (!xs_startswith(q_path, "/api/v1/") && !xs_startswith(q_path, "/api/v2/"))
        return 0;

    int status    = HTTP_STATUS_NOT_FOUND;
    xs *args      = NULL;
    const char *i_ctype = xs_dict_get(req, "content-type");

    if (i_ctype && xs_startswith(i_ctype, "application/json")) {
        if (!xs_is_null(payload)) {
            args = xs_json_loads(payload);
        }
    }
    else if (i_ctype && xs_startswith(i_ctype, "application/x-www-form-urlencoded"))
    {
        // Some apps send form data instead of json so we should cater for those
        if (!xs_is_null(payload)) {
            args    = xs_url_vars(payload);
        }
    }
    else if (i_ctype && xs_startswith(i_ctype, "multipart/form-data"))
    {
        // Handle multipart/form-data by using p_vars (already parsed by httpd)
        args = xs_dup(xs_dict_get(req, "p_vars"));
    }

    /* if args still NULL, try falling back to p_vars or q_vars */
    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "p_vars"));

    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "q_vars"));

    if (args == NULL) {
        srv_debug(1, xs_fmt("mastoapi_post_handler: failed to parse args for %s, content-type: %s",
                           q_path, i_ctype ? i_ctype : "(null)"));
        return HTTP_STATUS_BAD_REQUEST;
    }

    xs *cmd = xs_replace_n(q_path, "/api", "", 1);

    snac snac = {0};
    int logged_in = process_auth_token(&snac, req);

    if (strcmp(cmd, "/v1/apps") == 0) { /** **/
        const char *name  = xs_dict_get(args, "client_name");
        const char *ruri  = xs_dict_get(args, "redirect_uris");
        const char *scope = xs_dict_get(args, "scope");

        /* Ice Cubes sends these values as query parameters, so try these */
        if (name == NULL && ruri == NULL && scope == NULL) {
            xs_free(args);
            args = xs_dup(xs_dict_get(req, "q_vars"));
            name  = xs_dict_get(args, "client_name");
            ruri  = xs_dict_get(args, "redirect_uris");
            scope = xs_dict_get(args, "scope");
        }

        if (xs_type(ruri) == XSTYPE_LIST)
            ruri = xs_dict_get(ruri, 0);

        if (name && ruri) {
            xs *app  = xs_dict_new();
            xs *id   = xs_replace_i(tid(0), ".", "");
            xs *csec = random_str();
            xs *vkey = xs_dup(xs_dict_get(srv_config, "vkey"));
            if (vkey == NULL)
                vkey = random_str();

            xs *cid  = NULL;

            /* pick a non-existent random cid */
            for (;;) {
                cid = random_str();
                xs *p_app = app_get(cid);

                if (p_app == NULL)
                    break;

                xs_free(cid);
            }

            app = xs_dict_append(app, "name",          name);
            app = xs_dict_append(app, "redirect_uri",  ruri);
            app = xs_dict_append(app, "client_id",     cid);
            app = xs_dict_append(app, "client_secret", csec);
            app = xs_dict_append(app, "vapid_key",     vkey);
            app = xs_dict_append(app, "id",            id);
            app = xs_dict_append(app, "client_secret_expires_at", xs_stock(0));

            *body  = xs_json_dumps(app, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;

            app = xs_dict_append(app, "code", "");

            if (scope)
                app = xs_dict_append(app, "scope", scope);

            app_add(cid, app);

            srv_debug(1, xs_fmt("mastoapi apps: new app %s", cid));
        }
    }
    else
    if (strcmp(cmd, "/v1/statuses") == 0) { /** **/
        if (logged_in) {
            /* post a new Note */
            const char *content          = xs_dict_get(args, "status");
            const char *mid              = xs_dict_get(args, "in_reply_to_id");
            const char *visibility       = xs_dict_get(args, "visibility");
            const char *summary          = xs_dict_get(args, "spoiler_text");
            const char *poll_opts        = xs_dict_get(args, "poll[options][]");
            const char *poll_end_secs    = xs_dict_get(args, "poll[expires_in]");
            const char *poll_multiple    = xs_dict_get(args, "poll[multiple]");
            // const char *poll_hide_totals = xs_dict_get(args, "poll[hide_totals]");
            const char *media_ids        = xs_dict_get(args, "media_ids");
            const char *language         = xs_dict_get(args, "language");

            if (xs_is_null(media_ids))
                media_ids = xs_dict_get(args, "media_ids[]");

            if (xs_is_null(media_ids))
                media_ids = xs_dict_get(args, "media_ids");

            if (xs_is_null(visibility))
                visibility = "public";

            xs *attach_list = xs_list_new();
            xs *irt         = NULL;

            /* is it a reply? */
            if (mid != NULL) {
                xs *r_msg = NULL;
                const char *md5 = MID_TO_MD5(mid);

                if (valid_status(object_get_by_md5(md5, &r_msg)))
                    irt = xs_dup(xs_dict_get(r_msg, "id"));
            }

            /* does it have attachments (and no poll)? */
            if (!xs_is_null(media_ids) && xs_is_null(poll_end_secs) && xs_is_null(poll_opts)) {
                xs *mi = NULL;

                if (xs_type(media_ids) == XSTYPE_LIST)
                    mi = xs_dup(media_ids);
                else {
                    mi = xs_list_new();
                    mi = xs_list_append(mi, media_ids);
                }

                xs_list *p = mi;
                const xs_str *v;

                while (xs_list_iter(&p, &v)) {
                    xs *l    = xs_list_new();
                    xs *url  = xs_fmt("%s/s/%s", snac.actor, v);
                    xs *desc = static_get_meta(&snac, v);

                    l = xs_list_append(l, url);
                    l = xs_list_append(l, desc);

                    attach_list = xs_list_append(attach_list, l);
                }
            }

            /* prepare the message */
            xs *msg = NULL;

            int scope = SCOPE_MENTIONED;
            if (strcmp(visibility, "unlisted") == 0)
                scope = SCOPE_UNLISTED;
            else
            if (strcmp(visibility, "public") == 0)
                scope = SCOPE_PUBLIC;
            else
            if (strcmp(visibility, "private") == 0)
                scope = SCOPE_FOLLOWERS;

            /* does it have a poll? */
            if (!xs_is_null(poll_opts) && !xs_is_null(poll_end_secs)) {
                xs *po = NULL;
                int end_secs = atoi(poll_end_secs);
                int multiple = 0;

                if (xs_type(poll_opts) == XSTYPE_LIST)
                    po = xs_dup(poll_opts);
                else {
                    po = xs_list_new();
                    po = xs_list_append(po, poll_opts);
                }

                if (!xs_is_null(poll_multiple) && strcmp(poll_multiple, "true") == 0)
                    multiple = 1;

                msg = msg_question(&snac, content, attach_list,
                                   poll_opts, multiple, end_secs);

                enqueue_close_question(&snac, xs_dict_get(msg, "id"), end_secs);
            }
            else
                msg = msg_note(&snac, content, NULL, irt, attach_list, scope, language, NULL);

            if (!xs_is_null(summary) && *summary) {
                msg = xs_dict_set(msg, "sensitive", xs_stock(XSTYPE_TRUE));
                msg = xs_dict_set(msg, "summary",   summary);
            }

            /* scheduled? */
            const char *scheduled_at = xs_dict_get(args, "scheduled_at");

            if (xs_is_string(scheduled_at) && *scheduled_at) {
                msg = xs_dict_set(msg, "published", scheduled_at);

                schedule_add(&snac, xs_dict_get(msg, "id"), msg);
            }
            else {
                /* store */
                timeline_add(&snac, xs_dict_get(msg, "id"), msg);

                /* 'Create' message */
                xs *c_msg = msg_create(&snac, msg);
                enqueue_message(&snac, c_msg);

                timeline_touch(&snac);
            }

            /* convert to a mastodon status as a response code */
            xs *st = mastoapi_status(&snac, msg);

            *body  = xs_json_dumps(st, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/statuses")) { /** **/
        if (logged_in) {
            /* operations on a status */
            xs *l = xs_split(cmd, "/");
            const char *mid = xs_list_get(l, 3);
            const char *op  = xs_list_get(l, 4);

            if (!xs_is_null(mid)) {
                xs *msg = NULL;
                xs *out = NULL;

                /* skip the 'fake' part of the id */
                mid = MID_TO_MD5(mid);

                /* try timeline first, then global object store for remote posts */
                int found = valid_status(timeline_get_by_md5(&snac, mid, &msg));
                if (!found)
                    found = valid_status(object_get_by_md5(mid, &msg));

                if (found) {
                    const char *id = xs_dict_get(msg, "id");

                    if (op == NULL) {
                        /* no operation (?) */
                    }
                    else
                    if (strcmp(op, "favourite") == 0) { /** **/
                        xs *n_msg = msg_admiration(&snac, id, "Like");

                        if (n_msg != NULL) {
                            enqueue_message(&snac, n_msg);
                            timeline_admire(&snac, xs_dict_get(n_msg, "object"), snac.actor, 1, msg);

                            out = mastoapi_status(&snac, msg);
                        }
                    }
                    else
                    if (strcmp(op, "unfavourite") == 0) { /** **/
                        xs *n_msg = msg_repulsion(&snac, id, "Like");

                        if (n_msg != NULL) {
                            object_user_cache_del(&snac, id, "admire");
                            enqueue_message(&snac, n_msg);

                            out = mastoapi_status(&snac, msg);
                        }
                    }
                    else
                    if (strcmp(op, "react") == 0) { /** **/
                        const char *eid = xs_list_get(l, 5);
                        xs *n_msg = msg_emoji_init(&snac, id, eid);
                        if (n_msg)
                            out = mastoapi_status(&snac, n_msg);
                    }
                    else
                    if (strcmp(op, "unreact") == 0) { /** **/
                        const char *eid = xs_list_get(l, 5);
                        xs *content = xs_fmt("%s", eid);

                        if (eid) {
                            xs *n_msg = msg_emoji_unreact(&snac, id, content);

                            if (n_msg != NULL) {
                                object_user_cache_del(&snac, id, "admire");
                                enqueue_message(&snac, n_msg);

                                out = mastoapi_status(&snac, msg);
                            }
                        }
                    }

                    else
                    if (strcmp(op, "reblog") == 0) { /** **/
                        xs *n_msg = msg_admiration(&snac, id, "Announce");

                        if (n_msg != NULL) {
                            enqueue_message(&snac, n_msg);
                            timeline_admire(&snac, xs_dict_get(n_msg, "object"), snac.actor, 0, msg);

                            out = mastoapi_status(&snac, msg);
                        }
                    }
                    else
                    if (strcmp(op, "unreblog") == 0) { /** **/
                        xs *n_msg = msg_repulsion(&snac, id, "Announce");

                        if (n_msg != NULL) {
                            enqueue_message(&snac, n_msg);

                            out = mastoapi_status(&snac, msg);
                        }
                    }
                    else
                    if (strcmp(op, "bookmark") == 0) { /** **/
                        /* bookmark this message */
                        if (bookmark(&snac, id) == 0)
                            out = mastoapi_status(&snac, msg);
                        else
                            status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
                    }
                    else
                    if (strcmp(op, "unbookmark") == 0) { /** **/
                        /* unbookmark this message */
                        unbookmark(&snac, id);
                        out = mastoapi_status(&snac, msg);
                    }
                    else
                    if (strcmp(op, "pin") == 0) { /** **/
                        /* pin this message */
                        if (pin(&snac, id) == 0)
                            out = mastoapi_status(&snac, msg);
                        else
                            status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
                    }
                    else
                    if (strcmp(op, "unpin") == 0) { /** **/
                        /* unpin this message */
                        unpin(&snac, id);
                        out = mastoapi_status(&snac, msg);
                    }
                    else
                    if (strcmp(op, "mute") == 0) { /** **/
                        /* Mastodon's mute is snac's hide */
                    }
                    else
                    if (strcmp(op, "unmute") == 0) { /** **/
                        /* Mastodon's unmute is snac's unhide */
                    }
                }

                if (out != NULL) {
                    *body  = xs_json_dumps(out, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/notifications/clear") == 0) { /** **/
        if (logged_in) {
            notify_clear(&snac);
            timeline_touch(&snac);

            *body  = xs_dup("{}");
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/push/subscription") == 0) { /** **/
        /* I don't know what I'm doing */
        if (logged_in) {
            const char *v;

            xs *wpush = xs_dict_new();

            wpush = xs_dict_append(wpush, "id", "1");

            v = xs_dict_get(args, "data");
            v = xs_dict_get(v, "alerts");
            wpush = xs_dict_append(wpush, "alerts", v);

            v = xs_dict_get(args, "subscription");
            v = xs_dict_get(v, "endpoint");
            wpush = xs_dict_append(wpush, "endpoint", v);

            xs *server_key = random_str();
            wpush = xs_dict_append(wpush, "server_key", server_key);

            *body  = xs_json_dumps(wpush, 4);
            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/media") == 0 || strcmp(cmd, "/v2/media") == 0) { /** **/
        if (logged_in) {
            const xs_list *file = xs_dict_get(args, "file");
            const char *desc    = xs_dict_get(args, "description");

            if (xs_is_null(desc))
                desc = "";

            status = HTTP_STATUS_BAD_REQUEST;

            if (xs_type(file) == XSTYPE_LIST) {
                const char *fn = xs_list_get(file, 0);

                if (*fn != '\0') {
                    char *ext = strrchr(fn, '.');
                    char rnd[32];
                    xs_rnd_buf(rnd, sizeof(rnd));
                    xs *hash  = xs_md5_hex(rnd, sizeof(rnd));
                    xs *id    = xs_fmt("post-%s%s", hash, ext ? ext : "");
                    xs *url   = xs_fmt("%s/s/%s", snac.actor, id);
                    int fo    = xs_number_get(xs_list_get(file, 1));
                    int fs    = xs_number_get(xs_list_get(file, 2));

                    /* store */
                    static_put(&snac, id, payload + fo, fs);
                    static_put_meta(&snac, id, desc);

                    /* prepare a response */
                    xs *rsp = xs_dict_new();

                    rsp = xs_dict_append(rsp, "id",          id);
                    rsp = xs_dict_append(rsp, "type",        "image");
                    rsp = xs_dict_append(rsp, "url",         url);
                    rsp = xs_dict_append(rsp, "preview_url", url);
                    rsp = xs_dict_append(rsp, "remote_url",  url);
                    rsp = xs_dict_append(rsp, "description", desc);

                    *body  = xs_json_dumps(rsp, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/accounts")) { /** **/
        if (logged_in) {
            /* account-related information */
            xs *l = xs_split(cmd, "/");
            const char *md5 = xs_list_get(l, 3);
            const char *opt = xs_list_get(l, 4);
            xs *rsp = NULL;

            if (!xs_is_null(md5) && *md5) {
                xs *actor_o = NULL;

                if (xs_is_null(opt)) {
                    /* ? */
                }
                else
                if (strcmp(opt, "follow") == 0) { /** **/
                    if (valid_status(object_get_by_md5(md5, &actor_o))) {
                        const char *actor = xs_dict_get(actor_o, "id");

                        xs *msg = msg_follow(&snac, actor);

                        if (msg != NULL) {
                            /* reload the actor from the message, in may be different */
                            actor = xs_dict_get(msg, "object");

                            following_add(&snac, actor, msg);

                            enqueue_output_by_actor(&snac, msg, actor, 0);

                            rsp = mastoapi_relationship(&snac, md5);
                        }
                    }
                }
                else
                if (strcmp(opt, "unfollow") == 0) { /** **/
                    if (valid_status(object_get_by_md5(md5, &actor_o))) {
                        const char *actor = xs_dict_get(actor_o, "id");

                        /* get the following object */
                        xs *object = NULL;

                        if (valid_status(following_get(&snac, actor, &object))) {
                            xs *msg = msg_undo(&snac, xs_dict_get(object, "object"));

                            following_del(&snac, actor);

                            enqueue_output_by_actor(&snac, msg, actor, 0);

                            rsp = mastoapi_relationship(&snac, md5);
                        }
                    }
                }
                else
                if (strcmp(opt, "block") == 0) { /** **/
                    if (valid_status(object_get_by_md5(md5, &actor_o))) {
                        const char *actor = xs_dict_get(actor_o, "id");

                        mute(&snac, actor);

                        rsp = mastoapi_relationship(&snac, md5);
                    }
                }
                else
                if (strcmp(opt, "unblock") == 0) { /** **/
                    if (valid_status(object_get_by_md5(md5, &actor_o))) {
                        const char *actor = xs_dict_get(actor_o, "id");

                        unmute(&snac, actor);

                        rsp = mastoapi_relationship(&snac, md5);
                    }
                }
            }

            if (rsp != NULL) {
                *body  = xs_json_dumps(rsp, 4);
                *ctype = "application/json";
                status = HTTP_STATUS_OK;
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/polls")) { /** **/
        if (logged_in) {
            /* operations on a status */
            xs *l = xs_split(cmd, "/");
            const char *mid = xs_list_get(l, 3);
            const char *op  = xs_list_get(l, 4);

            if (!xs_is_null(mid)) {
                xs *msg = NULL;
                xs *out = NULL;

                /* skip the 'fake' part of the id */
                mid = MID_TO_MD5(mid);

                /* try timeline first, then global object store for remote posts */
                int found = valid_status(timeline_get_by_md5(&snac, mid, &msg));
                if (!found)
                    found = valid_status(object_get_by_md5(mid, &msg));

                if (found) {
                    const char *id   = xs_dict_get(msg, "id");
                    const char *atto = get_atto(msg);
                    int closed = 0;
                    const char *f_closed = NULL;

                    if ((f_closed = xs_dict_get(msg, "closed")) != NULL) {
                        /* it has a closed date... but is it in the past? */
                        time_t t0 = time(NULL);
                        time_t t1 = xs_parse_iso_date(f_closed, 0);

                        if (t1 < t0)
                            closed = 1;
                    }

                    if (closed || was_question_voted(&snac, id))
                        status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
                    else {
                        const xs_list *opts = xs_dict_get(msg, "oneOf");
                        if (opts == NULL)
                            opts = xs_dict_get(msg, "anyOf");

                        if (op == NULL) {
                        }
                        else {
                            if (strcmp(op, "votes") == 0) {
                                const xs_list *choices = xs_dict_get(args, "choices[]");

                                if (xs_is_null(choices))
                                    choices = xs_dict_get(args, "choices");

                                if (xs_type(choices) == XSTYPE_LIST) {
                                    const xs_str *v;

                                    int c = 0;
                                    while (xs_list_next(choices, &v, &c)) {
                                        int io           = atoi(v);
                                        const xs_dict *o = xs_list_get(opts, io);

                                        if (o) {
                                            const char *name = xs_dict_get(o, "name");

                                            xs *msg = msg_note(&snac, "", atto, (char *)id, NULL, 1, NULL, NULL);
                                            msg = xs_dict_append(msg, "name", name);

                                            xs *c_msg = msg_create(&snac, msg);
                                            enqueue_message(&snac, c_msg);
                                            timeline_add(&snac, xs_dict_get(msg, "id"), msg);
                                        }
                                    }

                                    out = mastoapi_poll(&snac, msg);
                                }
                            }
                        }
                    }
                }

                if (out != NULL) {
                    *body  = xs_json_dumps(out, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (strcmp(cmd, "/v1/lists") == 0) {
        if (logged_in) {
            const char *title = xs_dict_get(args, "title");

            if (xs_type(title) == XSTYPE_STRING) {
                /* add the list */
                xs *out = xs_dict_new();
                xs *lid = list_maint(&snac, title, OP_ADD);

                if (!xs_is_null(lid)) {
                    out = xs_dict_append(out, "id", lid);
                    out = xs_dict_append(out, "title", title);
                    out = xs_dict_append(out, "replies_policy", xs_dict_get_def(args, "replies_policy", "list"));
                    out = xs_dict_append(out, "exclusive", xs_stock(XSTYPE_FALSE));

                    status = HTTP_STATUS_OK;
                }
                else {
                    out = xs_dict_append(out, "error", "cannot create list");
                    status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
                }

                *body  = xs_json_dumps(out, 4);
                *ctype = "application/json";
            }
            else
                status = HTTP_STATUS_UNPROCESSABLE_CONTENT;
        }
    }
    else
    if (xs_startswith(cmd, "/v1/lists/")) { /** list maintenance **/
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *op = xs_list_get(l, -1);
            const char *id = xs_list_get(l, -2);

            if (op && id && xs_is_hex(id)) {
                if (strcmp(op, "accounts") == 0) {
                    const xs_list *accts = xs_dict_get(args, "account_ids[]");

                    if (xs_is_null(accts))
                        accts = xs_dict_get(args, "account_ids");

                    int c = 0;
                    const char *v;

                    while (xs_list_next(accts, &v, &c)) {
                        list_members(&snac, id, v, OP_ADD);
                    }

                    xs *out = xs_dict_new();
                    *body   = xs_json_dumps(out, 4);
                    *ctype  = "application/json";
                    status  = HTTP_STATUS_OK;
                }
            }
        }
    }
    else if (strcmp(cmd, "/v1/markers") == 0) { /** **/
        xs_str *json = NULL;
        if (logged_in) {
            const xs_str *home_marker = xs_dict_get(args, "home[last_read_id]");
            if (xs_is_null(home_marker)) {
                const xs_dict *home = xs_dict_get(args, "home");
                if (!xs_is_null(home))
                    home_marker = xs_dict_get(home, "last_read_id");
            }

            const xs_str *notify_marker = xs_dict_get(args, "notifications[last_read_id]");
            if (xs_is_null(notify_marker)) {
                const xs_dict *notify = xs_dict_get(args, "notifications");
                if (!xs_is_null(notify))
                    notify_marker = xs_dict_get(notify, "last_read_id");
            }
            json = xs_json_dumps(markers_set(&snac, home_marker, notify_marker), 4);
        }
        if (!xs_is_null(json))
            *body = json;
        else
            *body = xs_dup("{}");

        *ctype = "application/json";
        status = HTTP_STATUS_OK;
    }
    else
    if (xs_startswith(cmd, "/v1/follow_requests")) { /** **/
        if (logged_in) {
            /* "authorize" or "reject" */
            xs *rel = NULL;
            xs *l = xs_split(cmd, "/");
            const char *md5 = xs_list_get(l, -2);
            const char *s_cmd = xs_list_get(l, -1);

            if (xs_is_string(md5) && xs_is_string(s_cmd)) {
                xs *actor = NULL;

                if (valid_status(object_get_by_md5(md5, &actor))) {
                    const char *actor_id = xs_dict_get(actor, "id");

                    if (strcmp(s_cmd, "authorize") == 0) {
                        xs *fwreq = pending_get(&snac, actor_id);

                        if (fwreq != NULL) {
                            xs *reply = msg_accept(&snac, fwreq, actor_id);

                            enqueue_message(&snac, reply);

                            if (xs_is_null(xs_dict_get(fwreq, "published"))) {
                                xs *date = xs_str_utctime(0, ISO_DATE_SPEC);
                                fwreq = xs_dict_set(fwreq, "published", date);
                            }

                            timeline_add(&snac, xs_dict_get(fwreq, "id"), fwreq);

                            follower_add(&snac, actor_id);

                            pending_del(&snac, actor_id);
                            rel = mastoapi_relationship(&snac, md5);
                        }
                    }
                    else
                    if (strcmp(s_cmd, "reject") == 0) {
                        pending_del(&snac, actor_id);
                        rel = mastoapi_relationship(&snac, md5);
                    }
                }
            }

            if (rel != NULL) {
                *body = xs_json_dumps(rel, 4);
                *ctype = "application/json";
                status = HTTP_STATUS_OK;
            }
        }
    }
    else
    if (xs_startswith(cmd, "/v1/tags/")) { /** **/
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *i_tag = xs_list_get(l, 3);
            const char *cmd = xs_list_get(l, 4);

            status = HTTP_STATUS_UNPROCESSABLE_CONTENT;

            if (xs_is_string(i_tag) && xs_is_string(cmd)) {
                int ok = 0;

                xs *tag = xs_fmt("#%s", i_tag);
                xs *followed_hashtags = xs_dup(xs_dict_get_def(snac.config,
                                "followed_hashtags", xs_stock(XSTYPE_LIST)));

                if (strcmp(cmd, "follow") == 0) {
                    followed_hashtags = xs_list_append(followed_hashtags, tag);
                    ok = 1;
                }
                else
                if (strcmp(cmd, "unfollow") == 0) {
                    int off = xs_list_in(followed_hashtags, tag);

                    if (off != -1)
                        followed_hashtags = xs_list_del(followed_hashtags, off);

                    ok = 1;
                }

                if (ok) {
                    /* update */
                    xs_dict_set(snac.config, "followed_hashtags", followed_hashtags);
                    user_persist(&snac, 0);

                    xs *d = xs_dict_new();
                    xs *s = xs_fmt("%s?t=%s", srv_baseurl, i_tag);
                    d = xs_dict_set(d, "name", i_tag);
                    d = xs_dict_set(d, "url", s);
                    d = xs_dict_set(d, "history", xs_stock(XSTYPE_LIST));

                    *body = xs_json_dumps(d, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
    }
    else
        status = HTTP_STATUS_UNPROCESSABLE_CONTENT;

    /* user cleanup */
    if (logged_in)
        user_free(&snac);

    srv_debug(1, xs_fmt("mastoapi_post_handler %s %d", q_path, status));

    return status;
}


int mastoapi_delete_handler(const xs_dict *req, const char *q_path,
                          const char *payload, int p_size,
                          char **body, int *b_size, char **ctype)
{
    (void)p_size;
    (void)b_size;
    (void)ctype;

    if (!xs_startswith(q_path, "/api/v1/") && !xs_startswith(q_path, "/api/v2/"))
        return 0;

    int status    = HTTP_STATUS_NOT_FOUND;
    xs *args      = NULL;
    const char *i_ctype = xs_dict_get(req, "content-type");

    if (i_ctype && xs_startswith(i_ctype, "application/json")) {
        if (!xs_is_null(payload))
            args = xs_json_loads(payload);
    }
    else if (i_ctype && xs_startswith(i_ctype, "application/x-www-form-urlencoded"))
    {
        // Some apps send form data instead of json so we should cater for those
        if (!xs_is_null(payload)) {
            args = xs_url_vars(payload);
        }
    }
    else
        args = xs_dup(xs_dict_get(req, "p_vars"));

    if (args == NULL)
        return HTTP_STATUS_BAD_REQUEST;

    snac snac = {0};
    int logged_in = process_auth_token(&snac, req);

    xs *cmd = xs_replace_n(q_path, "/api", "", 1);

    if (xs_startswith(cmd, "/v1/push/subscription") || xs_startswith(cmd, "/v2/push/subscription")) { /** **/
        // pretend we deleted it, since it doesn't exist anyway
        status = HTTP_STATUS_OK;
    }
    else
    if (xs_startswith(cmd, "/v1/lists/")) {
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *p = xs_list_get(l, -1);

            if (p) {
                if (strcmp(p, "accounts") == 0) {
                    /* delete account from list */
                    p = xs_list_get(l, -2);
                    const xs_list *accts = xs_dict_get(args, "account_ids[]");

                    if (xs_is_null(accts))
                        accts = xs_dict_get(args, "account_ids");

                    int c = 0;
                    const char *v;

                    while (xs_list_next(accts, &v, &c)) {
                        list_members(&snac, p, v, OP_DEL);
                    }
                }
                else {
                    /* delete list */
                    if (xs_is_hex(p)) {
                        list_maint(&snac, p, OP_DEL);
                    }
                }
            }

            *ctype = "application/json";
            status = HTTP_STATUS_OK;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/statuses/")) {
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *p = xs_list_get(l, -1);
            p = MID_TO_MD5(p);

            xs *obj = NULL;
            if (valid_status(object_get_by_md5(p, &obj))) {
                const char *id = xs_dict_get(obj, "id");

                if (xs_is_string(id) && is_msg_mine(&snac, id)) {
                    xs *out = mastoapi_status(&snac, obj);

                    xs *msg = msg_delete(&snac, id);

                    enqueue_message(&snac, msg);

                    timeline_del(&snac, id);

                    draft_del(&snac, id);

                    schedule_del(&snac, id);

                    snac_log(&snac, xs_fmt("deleted entry %s", id));

                    *body = xs_json_dumps(out, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/profile/")) {
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *p = xs_list_get(l, -1);

            if (strcmp(p, "avatar") == 0 || strcmp(p, "header") == 0) {
                snac.config = xs_dict_set(snac.config, p, "");

                if (user_persist(&snac, 1) == 0)
                    credentials_get(body, ctype, &status, snac);
                else
                    status = HTTP_STATUS_INTERNAL_SERVER_ERROR;
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }

    /* user cleanup */
    if (logged_in)
        user_free(&snac);

    srv_debug(1, xs_fmt("mastoapi_delete_handler %s %d", q_path, status));

    return status;
}


int mastoapi_put_handler(const xs_dict *req, const char *q_path,
                          const char *payload, int p_size,
                          char **body, int *b_size, char **ctype)
{
    (void)p_size;
    (void)b_size;

    if (!xs_startswith(q_path, "/api/v1/") && !xs_startswith(q_path, "/api/v2/"))
        return 0;

    int status    = HTTP_STATUS_NOT_FOUND;
    xs *args      = NULL;
    const char *i_ctype = xs_dict_get(req, "content-type");

    if (i_ctype && xs_startswith(i_ctype, "application/json")) {
        if (!xs_is_null(payload))
            args = xs_json_loads(payload);
    }
    else if (i_ctype && xs_startswith(i_ctype, "application/x-www-form-urlencoded"))
    {
        // Some apps send form data instead of json so we should cater for those
        if (!xs_is_null(payload)) {
            args    = xs_url_vars(payload);
        }
    }
    else if (i_ctype && xs_startswith(i_ctype, "multipart/form-data"))
    {
        // Handle multipart/form-data by using p_vars (already parsed by httpd)
        args = xs_dup(xs_dict_get(req, "p_vars"));
    }

    /* if args still NULL, try falling back to p_vars or q_vars */
    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "p_vars"));

    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "q_vars"));

    if (args == NULL) {
        srv_debug(1, xs_fmt("mastoapi_put_handler: failed to parse args for %s, content-type: %s",
                           q_path, i_ctype ? i_ctype : "(null)"));
        return HTTP_STATUS_BAD_REQUEST;
    }

    xs *cmd = xs_replace_n(q_path, "/api", "", 1);

    snac snac = {0};
    int logged_in = process_auth_token(&snac, req);

    if (xs_startswith(cmd, "/v1/media") || xs_startswith(cmd, "/v2/media")) { /** **/
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *stid = xs_list_get(l, 3);

            if (!xs_is_null(stid)) {
                const char *desc = xs_dict_get(args, "description");

                /* set the image metadata */
                static_put_meta(&snac, stid, desc);

                /* prepare a response */
                xs *rsp = xs_dict_new();
                xs *url = xs_fmt("%s/s/%s", snac.actor, stid);

                rsp = xs_dict_append(rsp, "id",          stid);
                rsp = xs_dict_append(rsp, "type",        "image");
                rsp = xs_dict_append(rsp, "url",         url);
                rsp = xs_dict_append(rsp, "preview_url", url);
                rsp = xs_dict_append(rsp, "remote_url",  url);
                rsp = xs_dict_append(rsp, "description", desc);

                *body  = xs_json_dumps(rsp, 4);
                *ctype = "application/json";
                status = HTTP_STATUS_OK;
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }
    else
    if (xs_startswith(cmd, "/v1/statuses")) {
        if (logged_in) {
            xs *l = xs_split(cmd, "/");
            const char *mid = xs_list_get(l, 3);

            if (!xs_is_null(mid)) {
                const char *md5 = MID_TO_MD5(mid);
                xs *rsp = NULL;
                xs *msg = NULL;

                if (valid_status(timeline_get_by_md5(&snac, md5, &msg))) {
                    const char *content = xs_dict_get(args, "status");
                    xs *atls = xs_list_new();
                    xs *tag = xs_list_new();
                    xs *f_content0 = not_really_markdown(content, &atls, &tag);
                    xs *f_content = process_tags(&snac, f_content0, &tag);

                    /* replace fields with new content */
                    msg = xs_dict_set(msg, "sourceContent", content);
                    msg = xs_dict_set(msg, "content", f_content);

                    xs *content_map = xs_dup(xs_dict_get(msg, "contentMap"));
                    if (xs_is_dict(content_map)) {
                        /* get the first pair */
                        const char *k, *v;
                        int c = 0;

                        if (xs_dict_next(content_map, &k, &v, &c)) {
                            content_map = xs_dict_set(content_map, k, f_content);
                            msg = xs_dict_set(msg, "contentMap", content_map);
                        }
                    }

                    xs *updated = xs_str_utctime(0, ISO_DATE_SPEC);
                    msg = xs_dict_set(msg, "updated", updated);

                    msg = xs_dict_set(msg, "tag", tag);

                    if (xs_is_true(xs_dict_get(args, "sensitive"))) {
                        const char *spoiler_text = xs_dict_get(args, "spoiler_text");
                        msg = xs_dict_set(msg, "summary", spoiler_text);
                        msg = xs_dict_set(msg, "sensitive", xs_stock(XSTYPE_TRUE));
                    }
                    else {
                        msg = xs_dict_set(msg, "summary", "");
                        msg = xs_dict_set(msg, "sensitive", xs_stock(XSTYPE_FALSE));
                    }

                    /* overwrite object, not updating the indexes */
                    const char *id = xs_dict_get(msg, "id");

                    object_add_ow(id, msg);

                    tag_index(id, msg);

                    /* update message */
                    xs *c_msg = msg_update(&snac, msg);

                    enqueue_message(&snac, c_msg);

                    rsp = mastoapi_status(&snac, msg);
                }

                if (rsp != NULL) {
                    *body  = xs_json_dumps(rsp, 4);
                    *ctype = "application/json";
                    status = HTTP_STATUS_OK;
                }
            }
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }

    /* user cleanup */
    if (logged_in)
        user_free(&snac);

    srv_debug(1, xs_fmt("mastoapi_put_handler %s %d", q_path, status));

    return status;
}

void persist_image(const char *key, const xs_val *data, const char *payload, snac *snac)
/* Store header or avatar */
{
    if (data != NULL) {
        if (xs_type(data) == XSTYPE_LIST) {
            const char *fn = xs_list_get(data, 0);

            if (fn && *fn) {
                const char *ext = strrchr(fn, '.');

                /* Mona iOS sends always jpg as application/octet-stream with no filename */
                if (ext == NULL || strcmp(fn, key) == 0) {
                    ext = ".jpg";
                }

                /* Make sure we have a unique file name, otherwise updated images will not be
                 * re-loaded by clients. */
                xs *rnd         = random_str();
                xs *hash        = xs_md5_hex(rnd, strlen(rnd));
                xs *id          = xs_fmt("%s%s", hash, ext);
                xs *url         = xs_fmt("%s/s/%s", snac->actor, id);
                int fo          = xs_number_get(xs_list_get(data, 1));
                int fs          = xs_number_get(xs_list_get(data, 2));

                /* store */
                static_put(snac, id, payload + fo, fs);

                snac->config = xs_dict_set(snac->config, key, url);
            }
        }
    }
}

int mastoapi_patch_handler(const xs_dict *req, const char *q_path,
                          const char *payload, int p_size,
                          char **body, int *b_size, char **ctype)
/* Handle profile updates */
{
    (void)p_size;
    (void)b_size;

    if (!xs_startswith(q_path, "/api/v1/"))
        return 0;

    int status    = HTTP_STATUS_NOT_FOUND;
    xs *args      = NULL;
    const char *i_ctype = xs_dict_get(req, "content-type");

    if (i_ctype && xs_startswith(i_ctype, "application/json")) {
        if (!xs_is_null(payload))
            args = xs_json_loads(payload);
    }
    else if (i_ctype && xs_startswith(i_ctype, "application/x-www-form-urlencoded"))
    {
        // Some apps send form data instead of json so we should cater for those
        if (!xs_is_null(payload)) {
            args    = xs_url_vars(payload);
        }
    }
    else if (i_ctype && xs_startswith(i_ctype, "multipart/form-data"))
    {
        // Handle multipart/form-data by using p_vars (already parsed by httpd)
        args = xs_dup(xs_dict_get(req, "p_vars"));
    }

    /* if args still NULL, try falling back to p_vars or q_vars */
    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "p_vars"));

    if (args == NULL)
        args = xs_dup(xs_dict_get(req, "q_vars"));

    if (args == NULL) {
        srv_debug(1, xs_fmt("mastoapi_patch_handler: failed to parse args for %s, content-type: %s",
                           q_path, i_ctype ? i_ctype : "(null)"));
        return HTTP_STATUS_BAD_REQUEST;
    }

    xs *cmd = xs_replace_n(q_path, "/api", "", 1);

    snac snac = {0};
    int logged_in = process_auth_token(&snac, req);

    if (xs_startswith(cmd, "/v1/accounts/update_credentials")) { /** **/
        /* Update user profile fields */
        if (logged_in) {
            int c = 0;
            const xs_str *k;
            const xs_val *v;
            const xs_str *field_name = NULL;
            xs *new_fields = xs_dict_new();
            while (xs_dict_next(args, &k, &v, &c)) {
                if (strcmp(k, "display_name") == 0) {
                    if (v != NULL)
                        snac.config = xs_dict_set(snac.config, "name", v);
                }
                else
                if (strcmp(k, "note") == 0) {
                    if (v != NULL)
                        snac.config = xs_dict_set(snac.config, "bio", v);
                }
                else
                if (strcmp(k, "bot") == 0) {
                    if (v != NULL)
                        snac.config = xs_dict_set(snac.config, "bot",
                            (strcmp(v, "true") == 0 ||
                                strcmp(v, "1") == 0) ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));
                }
                else
                if (strcmp(k, "source[sensitive]") == 0) {
                    if (v != NULL)
                        snac.config = xs_dict_set(snac.config, "cw",
                            strcmp(v, "true") == 0 ? "open" : "");
                }
                else
                if (strcmp(k, "source[privacy]") == 0) {
                    if (v != NULL)
                        snac.config = xs_dict_set(snac.config, "private",
                            strcmp(v, "private") == 0 ? xs_stock(XSTYPE_TRUE) : xs_stock(XSTYPE_FALSE));
                }
                else
                if (strcmp(k, "header") == 0) {
                    persist_image("header", v, payload, &snac);
                }
                else
                if (strcmp(k, "avatar") == 0) {
                    persist_image("avatar", v, payload, &snac);
                }
                else
                if (xs_between("fields_attributes", k, "[name]")) {
                    field_name = strcmp(v, "") != 0 ? v : NULL;
                }
                else
                if (xs_between("fields_attributes", k, "[value]")) {
                    if (field_name != NULL) {
                        new_fields = xs_dict_set(new_fields, field_name, v);
                        snac.config = xs_dict_set(snac.config, "metadata", new_fields);
                    }
                }
                else
                if (strcmp(k, "locked") == 0) {
                    snac.config = xs_dict_set(snac.config, "approve_followers",
                        xs_stock(strcmp(v, "true") == 0 ? XSTYPE_TRUE : XSTYPE_FALSE));
                }
                /* we don't have support for the following options, yet
                   - discoverable (0/1)
                 */
            }

            /* Persist profile */
            if (user_persist(&snac, 1) == 0)
                credentials_get(body, ctype, &status, snac);
            else
                status = HTTP_STATUS_INTERNAL_SERVER_ERROR;
        }
        else
            status = HTTP_STATUS_UNAUTHORIZED;
    }

    /* user cleanup */
    if (logged_in)
        user_free(&snac);

    srv_debug(1, xs_fmt("mastoapi_patch_handler %s %d", q_path, status));

    return status;
}


void mastoapi_purge(void)
{
    xs *spec   = xs_fmt("%s/app/" "*.json", srv_basedir);
    xs *files  = xs_glob(spec, 1, 0);
    xs_list *p = files;
    const xs_str *v;

    time_t mt = time(NULL) - 3600;

    while (xs_list_iter(&p, &v)) {
        xs *cid = xs_replace(v, ".json", "");
        xs *fn  = _app_fn(cid);

        if (mtime(fn) < mt) {
            /* get the app */
            xs *app = app_get(cid);

            if (app) {
                /* old apps with no uid are incomplete cruft */
                const char *uid = xs_dict_get(app, "uid");

                if (xs_is_null(uid) || *uid == '\0') {
                    unlink(fn);
                    srv_debug(2, xs_fmt("purged %s", fn));
                }
            }
        }
    }
}


#endif /* #ifndef NO_MASTODON_API */