Use static_get_meta() when preparing the attachment.

data.c

@@ -1366,7 +1366,7 @@ void static_put(snac *snac, const char *id, const char *data, int size)
 }
 
 
-void status_put_meta(snac *snac, const char *id, const char *str)
+void static_put_meta(snac *snac, const char *id, const char *str)
 /* puts metadata (i.e. a media description string) to id */
 {
     xs *fn = _static_fn(snac, id);
@@ -1380,7 +1380,7 @@ void status_put_meta(snac *snac, const char *id, const char *str)
 }
 
 
-xs_str *status_get_meta(snac *snac, const char *id)
+xs_str *static_get_meta(snac *snac, const char *id)
 /* gets metadata from a media */
 {
     xs *fn    = _static_fn(snac, id);

mastoapi.c

@@ -1303,11 +1303,12 @@ int mastoapi_post_handler(const xs_dict *req, const char *q_path,
                 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 *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, "");
+                    l = xs_list_append(l, desc);
 
                     attach_list = xs_list_append(attach_list, l);
                 }
@@ -1498,6 +1499,7 @@ int mastoapi_post_handler(const xs_dict *req, const char *q_path,
 
                     /* store */
                     static_put(&snac, id, payload + fo, fs);
+                    static_put_meta(&snac, id, desc);
 
                     /* prepare a response */
                     xs *rsp = xs_dict_new();

snac.h

@@ -130,8 +130,8 @@ int actor_get(snac *snac, const char *actor, d_char **data);
 
 int static_get(snac *snac, const char *id, d_char **data, int *size);
 void static_put(snac *snac, const char *id, const char *data, int size);
-void status_put_meta(snac *snac, const char *id, const char *str);
-xs_str *status_get_meta(snac *snac, const char *id);
+void static_put_meta(snac *snac, const char *id, const char *str);
+xs_str *static_get_meta(snac *snac, const char *id);
 
 double history_mtime(snac *snac, char *id);
 void history_add(snac *snac, char *id, char *content, int size);