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snac2/activitypub.c
default 085caa7747 New function get_in_reply_to().
2024-11-19 06:46:14 +01:00

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/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2024 grunfink et al. / MIT license */
#include "xs.h"
#include "xs_json.h"
#include "xs_curl.h"
#include "xs_mime.h"
#include "xs_openssl.h"
#include "xs_regex.h"
#include "xs_time.h"
#include "xs_set.h"
#include "xs_match.h"
#include "snac.h"
#include <sys/wait.h>
const char *public_address = "https:/" "/www.w3.org/ns/activitystreams#Public";
/* susie.png */
const char *susie =
"iVBORw0KGgoAAAANSUhEUgAAAEAAAABAAQAAAAC"
"CEkxzAAAAUUlEQVQoz43R0QkAMQwCUDdw/y3dwE"
"vsvzlL4X1IoQkAisKmwfAFT3RgJHbQezpSRoXEq"
"eqCL9BJBf7h3QbOCCxV5EVWMEMwG7K1/WODtlvx"
"AYTtEsDU9F34AAAAAElFTkSuQmCC";
const char *susie_cool =
"iVBORw0KGgoAAAANSUhEUgAAAEAAAABAAQAAAAC"
"CEkxzAAAAV0lEQVQoz43RwQ3AMAwCQDZg/y3ZgN"
"qo3+JaedwDOUQBQFHYaTB8wTM6sGl2cMPu+DFzn"
"+ZcgN7wF7ZVihXkfSlWIVzIA6dbQzaygllpNuTX"
"ZmmFNlvxADX1+o0cUPMbAAAAAElFTkSuQmCC";
const char *susie_muertos =
"iVBORw0KGgoAAAANSUhEUgAAAEAAAABAAQAAAAC"
"CEkxzAAAAV0lEQVQoz4XQsQ0AMQxCUW/A/lv+DT"
"ic6zGRolekIMyMELNp8PiCEw6Q4w4NoAt53IH5m"
"xXksrZYgZwJrIox+Z8vJAfe2lCxG6AK7eKkWcEb"
"QHbF617xAQatAAD7jJHUAAAAAElFTkSuQmCC";
const char *default_avatar_base64(void)
/* returns the default avatar in base64 */
{
time_t t = time(NULL);
struct tm tm;
const char *p = susie;
gmtime_r(&t, &tm);
if (tm.tm_mon == 10 && tm.tm_mday == 2)
p = susie_muertos;
else
if (tm.tm_wday == 0 || tm.tm_wday == 6)
p = susie_cool;
return p;
}
int activitypub_request(snac *user, const char *url, xs_dict **data)
/* request an object */
{
int status = 0;
xs *response = NULL;
xs *payload = NULL;
int p_size;
const char *ctype;
*data = NULL;
if (user != NULL) {
/* get from the net */
response = http_signed_request(user, "GET", url,
NULL, NULL, 0, &status, &payload, &p_size, 0);
}
if (status == 0 || (status >= 500 && status <= 599)) {
/* I found an instance running Misskey that returned
500 on signed messages but returned the object
perfectly without signing (?), so why not try */
xs_free(response);
xs *hdrs = xs_dict_new();
hdrs = xs_dict_append(hdrs, "accept", "application/activity+json");
hdrs = xs_dict_append(hdrs, "user-agent", USER_AGENT);
response = xs_http_request("GET", url, hdrs,
NULL, 0, &status, &payload, &p_size, 0);
}
if (valid_status(status)) {
/* ensure it's ActivityPub data */
ctype = xs_dict_get(response, "content-type");
if (xs_is_null(ctype))
status = HTTP_STATUS_BAD_REQUEST;
else
if (xs_str_in(ctype, "application/activity+json") != -1 ||
xs_str_in(ctype, "application/ld+json") != -1) {
/* if there is no payload, fail */
if (xs_is_null(payload))
status = HTTP_STATUS_BAD_REQUEST;
else
*data = xs_json_loads(payload);
}
else
status = HTTP_STATUS_INTERNAL_SERVER_ERROR;
}
return status;
}
int actor_request(snac *user, const char *actor, xs_dict **data)
/* request an actor */
{
int status;
xs *payload = NULL;
if (data)
*data = NULL;
/* get from disk first */
status = actor_get_refresh(user, actor, data);
if (!valid_status(status)) {
/* actor data non-existent: get from the net */
status = activitypub_request(user, actor, &payload);
if (valid_status(status)) {
/* renew data */
status = actor_add(actor, payload);
if (data != NULL) {
*data = payload;
payload = NULL;
}
}
else
srv_debug(1, xs_fmt("actor_request error %s %d", actor, status));
}
/* collect the (presumed) shared inbox in this actor */
if (xs_type(xs_dict_get(srv_config, "disable_inbox_collection")) != XSTYPE_TRUE) {
if (valid_status(status) && data && *data)
inbox_add_by_actor(*data);
}
return status;
}
const char *get_atto(const xs_dict *msg)
/* gets the attributedTo field (an actor) */
{
const xs_val *actor = xs_dict_get(msg, "attributedTo");
/* if the actor is a list of objects (like on Peertube videos), pick the Person */
if (xs_type(actor) == XSTYPE_LIST) {
const xs_list *p = actor;
int c = 0;
const xs_dict *v;
actor = NULL;
while (actor == NULL && xs_list_next(p, &v, &c)) {
if (xs_type(v) == XSTYPE_DICT) {
const char *type = xs_dict_get(v, "type");
if (xs_type(type) == XSTYPE_STRING && strcmp(type, "Person") == 0) {
actor = xs_dict_get(v, "id");
if (xs_type(actor) != XSTYPE_STRING)
actor = NULL;
}
}
}
}
return actor;
}
const char *get_in_reply_to(const xs_dict *msg)
/* gets the inReplyTo id */
{
const xs_val *in_reply_to = xs_dict_get(msg, "inReplyTo");
if (xs_type(in_reply_to) == XSTYPE_DICT)
in_reply_to = xs_dict_get(in_reply_to, "id");
return in_reply_to;
}
xs_list *get_attachments(const xs_dict *msg)
/* unify the garbage fire that are the attachments */
{
xs_list *l = xs_list_new();
const xs_list *p;
/* try first the attachments list */
if (!xs_is_null(p = xs_dict_get(msg, "attachment"))) {
xs *attach = NULL;
const xs_val *v;
/* ensure it's a list */
if (xs_type(p) == XSTYPE_DICT) {
attach = xs_list_new();
attach = xs_list_append(attach, p);
}
else
attach = xs_dup(p);
if (xs_type(attach) == XSTYPE_LIST && xs_list_len(attach) == 0) {
/* does the message have an image? */
const xs_dict *d = xs_dict_get(msg, "image");
if (xs_type(d) == XSTYPE_DICT) {
/* add it to the attachment list */
attach = xs_list_append(attach, d);
}
}
/* now iterate the list */
int c = 0;
while (xs_list_next(attach, &v, &c)) {
const char *type = xs_dict_get(v, "mediaType");
if (xs_is_null(type))
type = xs_dict_get(v, "type");
if (xs_is_null(type))
continue;
const char *href = xs_dict_get(v, "url");
if (xs_is_null(href))
href = xs_dict_get(v, "href");
if (xs_is_null(href))
continue;
/* infer MIME type from non-specific attachments */
if (xs_list_len(attach) < 2 && xs_match(type, "Link|Document")) {
char *mt = (char *)xs_mime_by_ext(href);
if (xs_match(mt, "image/*|audio/*|video/*")) /* */
type = mt;
}
const char *name = xs_dict_get(v, "name");
if (xs_is_null(name))
name = xs_dict_get(msg, "name");
if (xs_is_null(name))
name = "";
xs *d = xs_dict_new();
d = xs_dict_append(d, "type", type);
d = xs_dict_append(d, "href", href);
d = xs_dict_append(d, "name", name);
l = xs_list_append(l, d);
}
}
/** urls (attachments from Peertube) **/
p = xs_dict_get(msg, "url");
if (xs_type(p) == XSTYPE_LIST) {
const char *href = NULL;
const char *type = NULL;
int c = 0;
const xs_val *v;
while (href == NULL && xs_list_next(p, &v, &c)) {
if (xs_type(v) == XSTYPE_DICT) {
const char *mtype = xs_dict_get(v, "type");
if (xs_type(mtype) == XSTYPE_STRING && strcmp(mtype, "Link") == 0) {
mtype = xs_dict_get(v, "mediaType");
const xs_list *tag = xs_dict_get(v, "tag");
if (xs_type(mtype) == XSTYPE_STRING &&
strcmp(mtype, "application/x-mpegURL") == 0 &&
xs_type(tag) == XSTYPE_LIST) {
/* now iterate the tag list, looking for a video URL */
const xs_dict *d;
int c = 0;
while (href == NULL && xs_list_next(tag, &d, &c)) {
if (xs_type(d) == XSTYPE_DICT) {
if (xs_type(mtype = xs_dict_get(d, "mediaType")) == XSTYPE_STRING &&
xs_startswith(mtype, "video/")) {
const char *h = xs_dict_get(d, "href");
/* this is probably it */
if (xs_type(h) == XSTYPE_STRING) {
href = h;
type = mtype;
}
}
}
}
}
}
}
}
if (href && type) {
xs *d = xs_dict_new();
d = xs_dict_append(d, "href", href);
d = xs_dict_append(d, "type", type);
d = xs_dict_append(d, "name", "---");
l = xs_list_append(l, d);
}
}
return l;
}
int timeline_request(snac *snac, const char **id, xs_str **wrk, int level)
/* ensures that an entry and its ancestors are in the timeline */
{
int status = 0;
if (level < MAX_CONVERSATION_LEVELS && !xs_is_null(*id)) {
xs *msg = NULL;
/* from a blocked instance? discard and break */
if (is_instance_blocked(*id)) {
snac_debug(snac, 1, xs_fmt("timeline_request blocked instance %s", *id));
return status;
}
/* is the object already there? */
if (!valid_status(object_get(*id, &msg))) {
/* no; download it */
status = activitypub_request(snac, *id, &msg);
if (valid_status(status)) {
const xs_dict *object = msg;
const char *type = xs_dict_get(object, "type");
/* get the id again from the object, as it may be different */
const char *nid = xs_dict_get(object, "id");
if (xs_type(nid) != XSTYPE_STRING)
return 0;
if (wrk && strcmp(nid, *id) != 0) {
snac_debug(snac, 1,
xs_fmt("timeline_request canonical id for %s is %s", *id, nid));
*wrk = xs_dup(nid);
*id = *wrk;
}
if (xs_is_null(type))
type = "(null)";
srv_debug(2, xs_fmt("timeline_request type %s '%s'", nid, type));
if (strcmp(type, "Create") == 0) {
/* some software like lemmy nest Announce + Create + Note */
if (!xs_is_null(object = xs_dict_get(object, "object"))) {
type = xs_dict_get(object, "type");
nid = xs_dict_get(object, "id");
}
else
type = "(null)";
}
if (xs_match(type, POSTLIKE_OBJECT_TYPE)) {
if (content_match("filter_reject.txt", object))
snac_log(snac, xs_fmt("timeline_request rejected by content %s", nid));
else {
const char *actor = get_atto(object);
if (!xs_is_null(actor)) {
/* request (and drop) the actor for this entry */
if (!valid_status(actor_request(snac, actor, NULL))) {
/* failed? retry later */
enqueue_actor_refresh(snac, actor, 60);
}
/* does it have an ancestor? */
const char *in_reply_to = get_in_reply_to(object);
/* store */
timeline_add(snac, nid, object);
/* redistribute to lists for this user */
list_distribute(snac, actor, object);
/* recurse! */
timeline_request(snac, &in_reply_to, NULL, level + 1);
}
}
}
}
}
}
return status;
}
int send_to_inbox_raw(const char *keyid, const char *seckey,
const xs_str *inbox, const xs_dict *msg,
xs_val **payload, int *p_size, int timeout)
/* sends a message to an Inbox */
{
int status;
xs_dict *response;
xs *j_msg = xs_json_dumps((xs_dict *)msg, 4);
response = http_signed_request_raw(keyid, seckey, "POST", inbox,
NULL, j_msg, strlen(j_msg), &status, payload, p_size, timeout);
xs_free(response);
return status;
}
int send_to_inbox(snac *snac, const xs_str *inbox, const xs_dict *msg,
xs_val **payload, int *p_size, int timeout)
/* sends a message to an Inbox */
{
const char *seckey = xs_dict_get(snac->key, "secret");
return send_to_inbox_raw(snac->actor, seckey, inbox, msg, payload, p_size, timeout);
}
xs_str *get_actor_inbox(const char *actor, int shared)
/* gets an actor's inbox */
{
xs *data = NULL;
const char *v = NULL;
if (valid_status(actor_request(NULL, actor, &data))) {
/* try first endpoints/sharedInbox */
if (shared && (v = xs_dict_get(data, "endpoints")))
v = xs_dict_get(v, "sharedInbox");
/* try then the regular inbox */
if (xs_is_null(v))
v = xs_dict_get(data, "inbox");
}
return xs_is_null(v) ? NULL : xs_dup(v);
}
int send_to_actor(snac *snac, const char *actor, const xs_dict *msg,
xs_val **payload, int *p_size, int timeout)
/* sends a message to an actor */
{
int status = HTTP_STATUS_BAD_REQUEST;
xs *inbox = get_actor_inbox(actor, 1);
if (!xs_is_null(inbox))
status = send_to_inbox(snac, inbox, msg, payload, p_size, timeout);
return status;
}
void post_message(snac *snac, const char *actor, const xs_dict *msg)
/* posts a message immediately (bypassing the output queues) */
{
xs *payload = NULL;
int p_size;
int status = send_to_actor(snac, actor, msg, &payload, &p_size, 3);
srv_log(xs_fmt("post_message to actor %s %d", actor, status));
if (!valid_status(status))
/* cannot send right now, enqueue */
enqueue_message(snac, msg);
}
xs_list *recipient_list(snac *snac, const xs_dict *msg, int expand_public)
/* returns the list of recipients for a message */
{
const xs_val *to = xs_dict_get(msg, "to");
const xs_val *cc = xs_dict_get(msg, "cc");
xs_set rcpts;
int n;
xs_set_init(&rcpts);
const xs_list *lists[] = { to, cc, NULL };
for (n = 0; lists[n]; n++) {
xs_list *l = (xs_list *)lists[n];
const char *v;
xs *tl = NULL;
/* if it's a string, create a list with only one element */
if (xs_type(l) == XSTYPE_STRING) {
tl = xs_list_new();
tl = xs_list_append(tl, l);
l = tl;
}
while (xs_list_iter(&l, &v)) {
if (expand_public && strcmp(v, public_address) == 0) {
/* iterate the followers and add them */
xs *fwers = follower_list(snac);
const char *actor;
char *p = fwers;
while (xs_list_iter(&p, &actor))
xs_set_add(&rcpts, actor);
}
else
xs_set_add(&rcpts, v);
}
}
return xs_set_result(&rcpts);
}
int is_msg_public(const xs_dict *msg)
/* checks if a message is public */
{
const char *to = xs_dict_get(msg, "to");
const char *cc = xs_dict_get(msg, "cc");
int n;
const char *lists[] = { to, cc, NULL };
for (n = 0; lists[n]; n++) {
const xs_val *l = lists[n];
if (xs_type(l) == XSTYPE_STRING) {
if (strcmp(l, public_address) == 0)
return 1;
}
else
if (xs_type(l) == XSTYPE_LIST) {
if (xs_list_in(l, public_address) != -1)
return 1;
}
}
return 0;
}
int is_msg_from_private_user(const xs_dict *msg)
/* checks if a message is from a local, private user */
{
int ret = 0;
/* is this message from a local user? */
if (xs_startswith(xs_dict_get(msg, "id"), srv_baseurl)) {
const char *atto = get_atto(msg);
xs *l = xs_split(atto, "/");
const char *uid = xs_list_get(l, -1);
snac user;
if (uid && user_open(&user, uid)) {
if (xs_type(xs_dict_get(user.config, "private")) == XSTYPE_TRUE)
ret = 1;
user_free(&user);
}
}
return ret;
}
int is_msg_for_me(snac *snac, const xs_dict *c_msg)
/* checks if this message is for me */
{
const char *type = xs_dict_get(c_msg, "type");
const char *actor = xs_dict_get(c_msg, "actor");
if (strcmp(actor, snac->actor) == 0) {
/* message by myself? (most probably via the shared-inbox) reject */
snac_debug(snac, 1, xs_fmt("ignoring message by myself"));
return 0;
}
if (xs_match(type, "Like|Announce|EmojiReact")) {
const char *object = xs_dict_get(c_msg, "object");
if (xs_type(object) == XSTYPE_DICT)
object = xs_dict_get(object, "id");
/* bad object id? reject */
if (xs_type(object) != XSTYPE_STRING)
return 0;
/* if it's about one of our posts, accept it */
if (xs_startswith(object, snac->actor))
return 2;
/* if it's by someone we don't follow, reject */
return following_check(snac, actor);
}
/* if it's an Undo, it must be from someone related to us */
if (xs_match(type, "Undo")) {
return follower_check(snac, actor) || following_check(snac, actor);
}
/* if it's an Accept + Follow, it must be for a Follow we created */
if (xs_match(type, "Accept")) {
return following_check(snac, actor);
}
/* if it's a Follow, it must be explicitly for us */
if (xs_match(type, "Follow")) {
const char *object = xs_dict_get(c_msg, "object");
return !xs_is_null(object) && strcmp(snac->actor, object) == 0;
}
/* only accept Ping directed to us */
if (xs_match(type, "Ping")) {
const char *dest = xs_dict_get(c_msg, "to");
return !xs_is_null(dest) && strcmp(snac->actor, dest) == 0;
}
/* if it's not a Create or Update, allow as is */
if (!xs_match(type, "Create|Update")) {
return 1;
}
int pub_msg = is_msg_public(c_msg);
/* if this message is public and we follow the actor of this post, allow */
if (pub_msg && following_check(snac, actor))
return 1;
const xs_dict *msg = xs_dict_get(c_msg, "object");
xs *rcpts = recipient_list(snac, msg, 0);
xs_list *p = rcpts;
const xs_str *v;
xs *actor_followers = NULL;
if (!pub_msg) {
/* not a public message; get the actor and its followers list */
xs *actor_obj = NULL;
if (valid_status(object_get(actor, &actor_obj))) {
const xs_val *fw = xs_dict_get(actor_obj, "followers");
if (fw)
actor_followers = xs_dup(fw);
}
}
while(xs_list_iter(&p, &v)) {
/* explicitly for me? accept */
if (strcmp(v, snac->actor) == 0)
return 2;
if (pub_msg) {
/* a public message for someone we follow? (probably cc'ed) accept */
if (following_check(snac, v))
return 5;
}
else
if (actor_followers && strcmp(v, actor_followers) == 0) {
/* if this message is for this actor's followers, are we one of them? */
if (following_check(snac, actor))
return 6;
}
}
/* accept if it's by someone we follow */
const char *atto = get_atto(msg);
if (pub_msg && !xs_is_null(atto) && following_check(snac, atto))
return 3;
/* is this message a reply to another? */
const char *irt = get_in_reply_to(msg);
if (!xs_is_null(irt)) {
xs *r_msg = NULL;
/* try to get the replied message */
if (valid_status(object_get(irt, &r_msg))) {
atto = get_atto(r_msg);
/* accept if the replied message is from someone we follow */
if (pub_msg && !xs_is_null(atto) && following_check(snac, atto))
return 4;
}
}
return 0;
}
xs_str *process_tags(snac *snac, const char *content, xs_list **tag)
/* parses mentions and tags from content */
{
xs_str *nc = xs_str_new(NULL);
xs_list *tl = *tag;
xs *split;
xs_list *p;
const xs_val *v;
int n = 0;
/* create a default server for incomplete mentions */
xs *def_srv = NULL;
if (xs_list_len(tl)) {
/* if there are any mentions, get the server from
the first one, which is the inReplyTo author */
p = tl;
while (xs_list_iter(&p, &v)) {
const char *type = xs_dict_get(v, "type");
const char *name = xs_dict_get(v, "name");
if (type && name && strcmp(type, "Mention") == 0) {
xs *l = xs_split(name, "@");
def_srv = xs_dup(xs_list_get(l, -1));
break;
}
}
}
if (xs_is_null(def_srv))
/* use this same server */
def_srv = xs_dup(xs_dict_get(srv_config, "host"));
split = xs_regex_split(content, "(@[A-Za-z0-9_]+(@[A-Za-z0-9\\.-]+)?|&#[0-9]+;|#(_|[^[:punct:][:space:]])+)");
p = split;
while (xs_list_iter(&p, &v)) {
if ((n & 0x1)) {
if (*v == '@') {
xs *link = NULL;
xs *wuid = NULL;
if (strchr(v + 1, '@') == NULL) {
/* only one @? it's a dumb Mastodon-like mention
without server; add the default one */
wuid = xs_fmt("%s@%s", v, def_srv);
snac_debug(snac, 2, xs_fmt("mention without server '%s' '%s'", v, wuid));
}
else
wuid = xs_dup(v);
/* query the webfinger about this fellow */
xs *actor = NULL;
xs *uid = NULL;
int status;
status = webfinger_request(wuid, &actor, &uid);
if (valid_status(status) && actor && uid) {
xs *d = xs_dict_new();
xs *n = xs_fmt("@%s", uid);
d = xs_dict_append(d, "type", "Mention");
d = xs_dict_append(d, "href", actor);
d = xs_dict_append(d, "name", n);
tl = xs_list_append(tl, d);
link = xs_fmt("<span class=\"h-card\"><a href=\"%s\" class=\"u-url mention\">%s</a></span>", actor, n);
}
if (!xs_is_null(link))
nc = xs_str_cat(nc, link);
else
nc = xs_str_cat(nc, v);
}
else
if (*v == '#') {
/* hashtag */
xs *d = xs_dict_new();
xs *n = xs_tolower_i(xs_dup(v));
xs *h = xs_fmt("%s?t=%s", srv_baseurl, n + 1);
xs *l = xs_fmt("<a href=\"%s\" class=\"mention hashtag\" rel=\"tag\">%s</a>", h, v);
d = xs_dict_append(d, "type", "Hashtag");
d = xs_dict_append(d, "href", h);
d = xs_dict_append(d, "name", n);
tl = xs_list_append(tl, d);
/* add the code */
nc = xs_str_cat(nc, l);
}
else
if (*v == '&') {
/* HTML Unicode entity, probably part of an emoji */
/* write as is */
nc = xs_str_cat(nc, v);
}
}
else
nc = xs_str_cat(nc, v);
n++;
}
*tag = tl;
return nc;
}
void notify(snac *snac, const char *type, const char *utype, const char *actor, const xs_dict *msg)
/* notifies the user of relevant events */
{
/* skip our own notifications */
if (strcmp(snac->actor, actor) == 0)
return;
const char *id = xs_dict_get(msg, "id");
if (strcmp(type, "Create") == 0) {
/* only notify of notes specifically for us */
xs *rcpts = recipient_list(snac, msg, 0);
if (xs_list_in(rcpts, snac->actor) == -1)
return;
/* discard votes */
const xs_dict *note = xs_dict_get(msg, "object");
if (note && !xs_is_null(xs_dict_get(note, "name")))
return;
}
if (strcmp(type, "Undo") == 0 && strcmp(utype, "Follow") != 0)
return;
/* get the object id */
const char *objid = xs_dict_get(msg, "object");
if (xs_type(objid) == XSTYPE_DICT)
objid = xs_dict_get(objid, "id");
if (xs_match(type, "Like|Announce|EmojiReact")) {
/* if it's not an admiration about something by us, done */
if (xs_is_null(objid) || !xs_startswith(objid, snac->actor))
return;
}
/* updated poll? */
if (strcmp(type, "Update") == 0 && strcmp(utype, "Question") == 0) {
const xs_dict *poll;
const char *poll_id;
if ((poll = xs_dict_get(msg, "object")) == NULL)
return;
/* if it's not closed, discard */
if (xs_is_null(xs_dict_get(poll, "closed")))
return;
if ((poll_id = xs_dict_get(poll, "id")) == NULL)
return;
/* if it's not ours and we didn't vote, discard */
if (!xs_startswith(poll_id, snac->actor) && !was_question_voted(snac, poll_id))
return;
}
/* user will love to know about this! */
/* prepare message body */
xs *body = xs_fmt("User : @%s@%s\n",
xs_dict_get(snac->config, "uid"),
xs_dict_get(srv_config, "host")
);
if (strcmp(utype, "(null)") != 0) {
xs *s1 = xs_fmt("Type : %s + %s\n", type, utype);
body = xs_str_cat(body, s1);
}
else {
xs *s1 = xs_fmt("Type : %s\n", type);
body = xs_str_cat(body, s1);
}
{
xs *s1 = xs_fmt("Actor : %s\n", actor);
body = xs_str_cat(body, s1);
}
if (objid != NULL) {
xs *s1 = xs_fmt("Object: %s\n", objid);
body = xs_str_cat(body, s1);
}
/* email */
const char *email = "[disabled by admin]";
if (xs_type(xs_dict_get(srv_config, "disable_email_notifications")) != XSTYPE_TRUE) {
email = xs_dict_get(snac->config_o, "email");
if (xs_is_null(email)) {
email = xs_dict_get(snac->config, "email");
if (xs_is_null(email))
email = "[empty]";
}
}
if (*email != '\0' && *email != '[') {
snac_debug(snac, 1, xs_fmt("email notify %s %s %s", type, utype, actor));
xs *subject = xs_fmt("snac notify for @%s@%s",
xs_dict_get(snac->config, "uid"), xs_dict_get(srv_config, "host"));
xs *from = xs_fmt("snac-daemon <snac-daemon@%s>", xs_dict_get(srv_config, "host"));
xs *header = xs_fmt(
"From: %s\n"
"To: %s\n"
"Subject: %s\n"
"\n",
from, email, subject);
xs *email_body = xs_fmt("%s%s", header, body);
enqueue_email(email_body, 0);
}
/* telegram */
const char *bot = xs_dict_get(snac->config, "telegram_bot");
const char *chat_id = xs_dict_get(snac->config, "telegram_chat_id");
if (!xs_is_null(bot) && !xs_is_null(chat_id) && *bot && *chat_id)
enqueue_telegram(body, bot, chat_id);
/* ntfy */
const char *ntfy_server = xs_dict_get(snac->config, "ntfy_server");
const char *ntfy_token = xs_dict_get(snac->config, "ntfy_token");
if (!xs_is_null(ntfy_server) && *ntfy_server)
enqueue_ntfy(body, ntfy_server, ntfy_token);
/* auto boost */
if (xs_match(type, "Create") && xs_is_true(xs_dict_get(snac->config, "auto_boost"))) {
xs *msg = msg_admiration(snac, objid, "Announce");
enqueue_message(snac, msg);
snac_debug(snac, 1, xs_fmt("auto boosted %s", objid));
}
/* finally, store it in the notification folder */
if (strcmp(type, "Follow") == 0)
objid = id;
else
if (strcmp(utype, "Follow") == 0)
objid = actor;
notify_add(snac, type, utype, actor, objid != NULL ? objid : id, msg);
}
/** messages **/
xs_dict *msg_base(snac *snac, const char *type, const char *id,
const char *actor, const char *date, const char *object)
/* creates a base ActivityPub message */
{
xs *did = NULL;
xs *published = NULL;
xs *ntid = tid(0);
const char *obj_id;
if (xs_type(object) == XSTYPE_DICT)
obj_id = xs_dict_get(object, "id");
else
obj_id = object;
/* generated values */
if (date && strcmp(date, "@now") == 0) {
published = xs_str_utctime(0, ISO_DATE_SPEC);
date = published;
}
if (id != NULL) {
if (strcmp(id, "@dummy") == 0) {
did = xs_fmt("%s/d/%s/%s", snac->actor, ntid, type);
id = did;
}
else
if (strcmp(id, "@object") == 0) {
if (obj_id != NULL) {
did = xs_fmt("%s/%s_%s", obj_id, type, ntid);
id = did;
}
else
id = NULL;
}
else
if (strcmp(id, "@wrapper") == 0) {
/* like @object, but always generate the same id */
if (object != NULL) {
date = xs_dict_get(object, "published");
did = xs_fmt("%s/%s", obj_id, type);
id = did;
}
else
id = NULL;
}
}
xs_dict *msg = xs_dict_new();
msg = xs_dict_append(msg, "@context", "https:/" "/www.w3.org/ns/activitystreams");
msg = xs_dict_append(msg, "type", type);
if (id != NULL)
msg = xs_dict_append(msg, "id", id);
if (actor != NULL)
msg = xs_dict_append(msg, "actor", actor);
if (date != NULL)
msg = xs_dict_append(msg, "published", date);
if (object != NULL)
msg = xs_dict_append(msg, "object", object);
return msg;
}
xs_dict *msg_collection(snac *snac, const char *id)
/* creates an empty OrderedCollection message */
{
xs_dict *msg = msg_base(snac, "OrderedCollection", id, NULL, NULL, NULL);
xs *ol = xs_list_new();
msg = xs_dict_append(msg, "attributedTo", snac->actor);
msg = xs_dict_append(msg, "orderedItems", ol);
msg = xs_dict_append(msg, "totalItems", xs_stock(0));
return msg;
}
xs_dict *msg_accept(snac *snac, const xs_val *object, const char *to)
/* creates an Accept message (as a response to a Follow) */
{
xs_dict *msg = msg_base(snac, "Accept", "@dummy", snac->actor, NULL, object);
msg = xs_dict_append(msg, "to", to);
return msg;
}
xs_dict *msg_update(snac *snac, const xs_dict *object)
/* creates an Update message */
{
xs_dict *msg = msg_base(snac, "Update", "@object", snac->actor, "@now", object);
const char *type = xs_dict_get(object, "type");
if (strcmp(type, "Note") == 0) {
msg = xs_dict_append(msg, "to", xs_dict_get(object, "to"));
msg = xs_dict_append(msg, "cc", xs_dict_get(object, "cc"));
}
else
if (strcmp(type, "Person") == 0) {
msg = xs_dict_append(msg, "to", public_address);
/* also spam the people being followed, so that
they have the newest information about who we are */
xs *cc = following_list(snac);
msg = xs_dict_append(msg, "cc", cc);
}
else
msg = xs_dict_append(msg, "to", public_address);
return msg;
}
xs_dict *msg_admiration(snac *snac, const char *object, const char *type)
/* creates a Like or Announce message */
{
xs *a_msg = NULL;
xs_dict *msg = NULL;
xs *wrk = NULL;
/* call the object */
timeline_request(snac, &object, &wrk, 0);
if (valid_status(object_get(object, &a_msg))) {
xs *rcpts = xs_list_new();
xs *o_md5 = xs_md5_hex(object, strlen(object));
xs *id = xs_fmt("%s/%s/%s", snac->actor, *type == 'L' ? "l" : "a", o_md5);
msg = msg_base(snac, type, id, snac->actor, "@now", object);
if (is_msg_public(a_msg))
rcpts = xs_list_append(rcpts, public_address);
rcpts = xs_list_append(rcpts, get_atto(a_msg));
msg = xs_dict_append(msg, "to", rcpts);
}
else
snac_log(snac, xs_fmt("msg_admiration cannot retrieve object %s", object));
return msg;
}
xs_dict *msg_repulsion(snac *user, const char *id, const char *type)
/* creates an Undo + admiration message */
{
xs *a_msg = NULL;
xs_dict *msg = NULL;
if (valid_status(object_get(id, &a_msg))) {
/* create a clone of the original admiration message */
xs *object = msg_admiration(user, id, type);
/* delete the published date */
object = xs_dict_del(object, "published");
/* create an undo message for this object */
msg = msg_undo(user, object);
/* copy the 'to' field */
msg = xs_dict_set(msg, "to", xs_dict_get(object, "to"));
}
/* now we despise this */
object_unadmire(id, user->actor, *type == 'L' ? 1 : 0);
return msg;
}
xs_dict *msg_actor(snac *snac)
/* create a Person message for this actor */
{
xs *ctxt = xs_list_new();
xs *icon = xs_dict_new();
xs *keys = xs_dict_new();
xs *tags = xs_list_new();
xs *avtr = NULL;
xs *kid = NULL;
xs *f_bio = NULL;
xs_dict *msg = msg_base(snac, "Person", snac->actor, NULL, NULL, NULL);
const char *p;
int n;
/* change the @context (is this really necessary?) */
ctxt = xs_list_append(ctxt, "https:/" "/www.w3.org/ns/activitystreams");
ctxt = xs_list_append(ctxt, "https:/" "/w3id.org/security/v1");
msg = xs_dict_set(msg, "@context", ctxt);
msg = xs_dict_set(msg, "url", snac->actor);
msg = xs_dict_set(msg, "name", xs_dict_get(snac->config, "name"));
msg = xs_dict_set(msg, "preferredUsername", snac->uid);
msg = xs_dict_set(msg, "published", xs_dict_get(snac->config, "published"));
xs *f_bio_2 = not_really_markdown(xs_dict_get(snac->config, "bio"), NULL, &tags);
f_bio = process_tags(snac, f_bio_2, &tags);
msg = xs_dict_set(msg, "summary", f_bio);
msg = xs_dict_set(msg, "tag", tags);
char *folders[] = { "inbox", "outbox", "followers", "following", "featured", NULL };
for (n = 0; folders[n]; n++) {
xs *f = xs_fmt("%s/%s", snac->actor, folders[n]);
msg = xs_dict_set(msg, folders[n], f);
}
p = xs_dict_get(snac->config, "avatar");
if (*p == '\0')
avtr = xs_fmt("%s/susie.png", srv_baseurl);
else
avtr = xs_dup(p);
icon = xs_dict_append(icon, "type", "Image");
icon = xs_dict_append(icon, "mediaType", xs_mime_by_ext(avtr));
icon = xs_dict_append(icon, "url", avtr);
msg = xs_dict_set(msg, "icon", icon);
kid = xs_fmt("%s#main-key", snac->actor);
keys = xs_dict_append(keys, "id", kid);
keys = xs_dict_append(keys, "owner", snac->actor);
keys = xs_dict_append(keys, "publicKeyPem", xs_dict_get(snac->key, "public"));
msg = xs_dict_set(msg, "publicKey", keys);
/* if the "bot" config field is set to true, change type to "Service" */
if (xs_type(xs_dict_get(snac->config, "bot")) == XSTYPE_TRUE)
msg = xs_dict_set(msg, "type", "Service");
/* add the header image, if there is one defined */
const char *header = xs_dict_get(snac->config, "header");
if (!xs_is_null(header)) {
xs *d = xs_dict_new();
d = xs_dict_append(d, "type", "Image");
d = xs_dict_append(d, "mediaType", xs_mime_by_ext(header));
d = xs_dict_append(d, "url", header);
msg = xs_dict_set(msg, "image", d);
}
/* add the metadata as attachments of PropertyValue */
const xs_dict *metadata = xs_dict_get(snac->config, "metadata");
if (xs_type(metadata) == XSTYPE_DICT) {
xs *attach = xs_list_new();
const xs_str *k;
const xs_str *v;
int c = 0;
while (xs_dict_next(metadata, &k, &v, &c)) {
xs *d = xs_dict_new();
xs *k2 = encode_html(k);
xs *v2 = NULL;
if (xs_startswith(v, "https:/") || xs_startswith(v, "http:/")) {
xs *t = encode_html(v);
v2 = xs_fmt("<a href=\"%s\" rel=\"me\">%s</a>", t, t);
}
else
v2 = encode_html(v);
d = xs_dict_append(d, "type", "PropertyValue");
d = xs_dict_append(d, "name", k2);
d = xs_dict_append(d, "value", v2);
attach = xs_list_append(attach, d);
}
msg = xs_dict_set(msg, "attachment", attach);
}
/* use shared inboxes? */
if (xs_type(xs_dict_get(srv_config, "shared_inboxes")) == XSTYPE_TRUE) {
xs *d = xs_dict_new();
xs *si = xs_fmt("%s/shared-inbox", srv_baseurl);
d = xs_dict_append(d, "sharedInbox", si);
msg = xs_dict_set(msg, "endpoints", d);
}
/* does this user have an aka? */
const char *aka = xs_dict_get(snac->config, "alias");
if (xs_type(aka) == XSTYPE_STRING && *aka) {
xs *loaka = xs_list_append(xs_list_new(), aka);
msg = xs_dict_set(msg, "alsoKnownAs", loaka);
}
return msg;
}
xs_dict *msg_create(snac *snac, const xs_dict *object)
/* creates a 'Create' message */
{
xs_dict *msg = msg_base(snac, "Create", "@wrapper", snac->actor, NULL, object);
const xs_val *v;
if ((v = get_atto(object)))
msg = xs_dict_append(msg, "attributedTo", v);
if ((v = xs_dict_get(object, "cc")))
msg = xs_dict_append(msg, "cc", v);
if ((v = xs_dict_get(object, "to")))
msg = xs_dict_append(msg, "to", v);
else
msg = xs_dict_append(msg, "to", public_address);
return msg;
}
xs_dict *msg_undo(snac *snac, const xs_val *object)
/* creates an 'Undo' message */
{
xs_dict *msg = msg_base(snac, "Undo", "@object", snac->actor, "@now", object);
const char *to;
if (xs_type(object) == XSTYPE_DICT && (to = xs_dict_get(object, "object")))
msg = xs_dict_append(msg, "to", to);
return msg;
}
xs_dict *msg_delete(snac *snac, const char *id)
/* creates a 'Delete' + 'Tombstone' for a local entry */
{
xs *tomb = xs_dict_new();
xs_dict *msg = NULL;
/* sculpt the tombstone */
tomb = xs_dict_append(tomb, "type", "Tombstone");
tomb = xs_dict_append(tomb, "id", id);
/* now create the Delete */
msg = msg_base(snac, "Delete", "@object", snac->actor, "@now", tomb);
msg = xs_dict_append(msg, "to", public_address);
return msg;
}
xs_dict *msg_follow(snac *snac, const char *q)
/* creates a 'Follow' message */
{
xs *actor_o = NULL;
xs *actor = NULL;
xs_dict *msg = NULL;
int status;
xs *url_or_uid = xs_strip_i(xs_str_new(q));
if (xs_startswith(url_or_uid, "https:/") || xs_startswith(url_or_uid, "http:/"))
actor = xs_dup(url_or_uid);
else
if (!valid_status(webfinger_request(url_or_uid, &actor, NULL)) || actor == NULL) {
snac_log(snac, xs_fmt("cannot resolve user %s to follow", url_or_uid));
return NULL;
}
/* request the actor */
status = actor_request(snac, actor, &actor_o);
if (valid_status(status)) {
/* check if the actor is an alias */
const char *r_actor = xs_dict_get(actor_o, "id");
if (r_actor && strcmp(actor, r_actor) != 0) {
snac_log(snac, xs_fmt("actor to follow is an alias %s -> %s", actor, r_actor));
}
msg = msg_base(snac, "Follow", "@dummy", snac->actor, NULL, r_actor);
}
else
snac_log(snac, xs_fmt("cannot get actor to follow %s %d", actor, status));
return msg;
}
xs_dict *msg_note(snac *snac, const xs_str *content, const xs_val *rcpts,
const xs_str *in_reply_to, const xs_list *attach, int priv)
/* creates a 'Note' message */
{
xs *ntid = tid(0);
xs *id = xs_fmt("%s/p/%s", snac->actor, ntid);
xs *ctxt = NULL;
xs *fc2 = NULL;
xs *fc1 = NULL;
xs *to = NULL;
xs *cc = xs_list_new();
xs *irt = NULL;
xs *tag = xs_list_new();
xs *atls = xs_list_new();
xs_dict *msg = msg_base(snac, "Note", id, NULL, "@now", NULL);
xs_list *p;
const xs_val *v;
if (rcpts == NULL)
to = xs_list_new();
else {
if (xs_type(rcpts) == XSTYPE_STRING) {
to = xs_list_new();
to = xs_list_append(to, rcpts);
}
else
to = xs_dup(rcpts);
}
/* format the content */
fc2 = not_really_markdown(content, &atls, &tag);
if (in_reply_to != NULL && *in_reply_to) {
xs *p_msg = NULL;
xs *wrk = NULL;
/* demand this thing */
timeline_request(snac, &in_reply_to, &wrk, 0);
if (valid_status(object_get(in_reply_to, &p_msg))) {
/* add this author as recipient */
const char *a, *v;
if ((a = get_atto(p_msg)) && xs_list_in(to, a) == -1)
to = xs_list_append(to, a);
/* add this author to the tag list as a mention */
if (!xs_is_null(a)) {
xs *l = xs_split(a, "/");
xs *actor_o = NULL;
if (xs_list_len(l) > 3 && valid_status(object_get(a, &actor_o))) {
const char *uname = xs_dict_get(actor_o, "preferredUsername");
if (!xs_is_null(uname) && *uname) {
xs *handle = xs_fmt("@%s@%s", uname, xs_list_get(l, 2));
xs *t = xs_dict_new();
t = xs_dict_append(t, "type", "Mention");
t = xs_dict_append(t, "href", a);
t = xs_dict_append(t, "name", handle);
tag = xs_list_append(tag, t);
}
}
}
/* get the context, if there is one */
if ((v = xs_dict_get(p_msg, "context")))
ctxt = xs_dup(v);
/* propagate the conversation field, if there is one */
if ((v = xs_dict_get(p_msg, "conversation")))
msg = xs_dict_append(msg, "conversation", v);
/* if this message is public, ours will also be */
if (!priv && is_msg_public(p_msg) && xs_list_in(to, public_address) == -1)
to = xs_list_append(to, public_address);
}
irt = xs_dup(in_reply_to);
}
else
irt = xs_val_new(XSTYPE_NULL);
/* extract the mentions and hashtags and convert the content */
fc1 = process_tags(snac, fc2, &tag);
/* create the attachment list, if there are any */
if (!xs_is_null(attach)) {
int c = 0;
while (xs_list_next(attach, &v, &c)) {
xs *d = xs_dict_new();
const char *url = xs_list_get(v, 0);
const char *alt = xs_list_get(v, 1);
const char *mime = xs_mime_by_ext(url);
d = xs_dict_append(d, "mediaType", mime);
d = xs_dict_append(d, "url", url);
d = xs_dict_append(d, "name", alt);
d = xs_dict_append(d, "type",
xs_startswith(mime, "image/") ? "Image" : "Document");
atls = xs_list_append(atls, d);
}
}
if (ctxt == NULL)
ctxt = xs_fmt("%s#ctxt", id);
/* add all mentions to the cc */
p = tag;
while (xs_list_iter(&p, &v)) {
if (xs_type(v) == XSTYPE_DICT) {
const char *t;
if (!xs_is_null(t = xs_dict_get(v, "type")) && strcmp(t, "Mention") == 0) {
if (!xs_is_null(t = xs_dict_get(v, "href")))
cc = xs_list_append(cc, t);
}
}
}
/* no recipients? must be for everybody */
if (!priv && xs_list_len(to) == 0)
to = xs_list_append(to, public_address);
/* delete all cc recipients that also are in the to */
p = to;
while (xs_list_iter(&p, &v)) {
int i;
if ((i = xs_list_in(cc, v)) != -1)
cc = xs_list_del(cc, i);
}
msg = xs_dict_append(msg, "attributedTo", snac->actor);
msg = xs_dict_append(msg, "summary", "");
msg = xs_dict_append(msg, "content", fc1);
msg = xs_dict_append(msg, "context", ctxt);
msg = xs_dict_append(msg, "url", id);
msg = xs_dict_append(msg, "to", to);
msg = xs_dict_append(msg, "cc", cc);
msg = xs_dict_append(msg, "inReplyTo", irt);
msg = xs_dict_append(msg, "tag", tag);
msg = xs_dict_append(msg, "sourceContent", content);
if (xs_list_len(atls))
msg = xs_dict_append(msg, "attachment", atls);
return msg;
}
xs_dict *msg_ping(snac *user, const char *rcpt)
/* creates a Ping message (https://humungus.tedunangst.com/r/honk/v/tip/f/docs/ping.txt) */
{
xs_dict *msg = msg_base(user, "Ping", "@dummy", user->actor, NULL, NULL);
msg = xs_dict_append(msg, "to", rcpt);
return msg;
}
xs_dict *msg_pong(snac *user, const char *rcpt, const char *object)
/* creates a Pong message (https://humungus.tedunangst.com/r/honk/v/tip/f/docs/ping.txt) */
{
xs_dict *msg = msg_base(user, "Pong", "@dummy", user->actor, NULL, object);
msg = xs_dict_append(msg, "to", rcpt);
return msg;
}
xs_dict *msg_move(snac *user, const char *new_account)
/* creates a Move message (to move the user to new_account) */
{
xs_dict *msg = msg_base(user, "Move", "@dummy", user->actor, NULL, user->actor);
msg = xs_dict_append(msg, "target", new_account);
return msg;
}
xs_dict *msg_question(snac *user, const char *content, xs_list *attach,
const xs_list *opts, int multiple, int end_secs)
/* creates a Question message */
{
xs_dict *msg = msg_note(user, content, NULL, NULL, attach, 0);
int max = 8;
xs_set seen;
msg = xs_dict_set(msg, "type", "Question");
/* make it non-editable */
msg = xs_dict_del(msg, "sourceContent");
xs *o = xs_list_new();
xs_list *p = (xs_list *)opts;
const xs_str *v;
xs *replies = xs_json_loads("{\"type\":\"Collection\",\"totalItems\":0}");
xs_set_init(&seen);
while (max && xs_list_iter(&p, &v)) {
if (*v) {
xs *v2 = xs_dup(v);
xs *d = xs_dict_new();
if (strlen(v2) > 60) {
v2[60] = '\0';
v2 = xs_str_cat(v2, "...");
}
if (xs_set_add(&seen, v2) == 1) {
d = xs_dict_append(d, "type", "Note");
d = xs_dict_append(d, "name", v2);
d = xs_dict_append(d, "replies", replies);
o = xs_list_append(o, d);
max--;
}
}
}
xs_set_free(&seen);
msg = xs_dict_append(msg, multiple ? "anyOf" : "oneOf", o);
/* set the end time */
time_t t = time(NULL) + end_secs;
xs *et = xs_str_utctime(t, ISO_DATE_SPEC);
msg = xs_dict_append(msg, "endTime", et);
return msg;
}
int update_question(snac *user, const char *id)
/* updates the poll counts */
{
xs *msg = NULL;
xs *rcnt = xs_dict_new();
xs *lopts = xs_list_new();
const xs_list *opts;
xs_list *p;
const xs_val *v;
/* get the object */
if (!valid_status(object_get(id, &msg)))
return -1;
/* closed? do nothing more */
if (xs_dict_get(msg, "closed"))
return -2;
/* get the options */
if ((opts = xs_dict_get(msg, "oneOf")) == NULL &&
(opts = xs_dict_get(msg, "anyOf")) == NULL)
return -3;
/* fill the initial count */
int c = 0;
while (xs_list_next(opts, &v, &c)) {
const char *name = xs_dict_get(v, "name");
if (name) {
lopts = xs_list_append(lopts, name);
rcnt = xs_dict_set(rcnt, name, xs_stock(0));
}
}
xs_set s;
xs_set_init(&s);
/* iterate now the children (the votes) */
xs *chld = object_children(id);
p = chld;
while (xs_list_iter(&p, &v)) {
xs *obj = NULL;
if (!valid_status(object_get_by_md5(v, &obj)))
continue;
const char *name = xs_dict_get(obj, "name");
const char *atto = get_atto(obj);
if (name && atto) {
/* get the current count */
const xs_number *cnt = xs_dict_get(rcnt, name);
if (xs_type(cnt) == XSTYPE_NUMBER) {
/* if it exists, increment */
xs *ucnt = xs_number_new(xs_number_get(cnt) + 1);
rcnt = xs_dict_set(rcnt, name, ucnt);
xs_set_add(&s, atto);
}
}
}
xs *rcpts = xs_set_result(&s);
/* create a new list of options with their new counts */
xs *nopts = xs_list_new();
p = lopts;
while (xs_list_iter(&p, &v)) {
const xs_number *cnt = xs_dict_get(rcnt, v);
if (xs_type(cnt) == XSTYPE_NUMBER) {
xs *d1 = xs_dict_new();
xs *d2 = xs_dict_new();
d2 = xs_dict_append(d2, "type", "Collection");
d2 = xs_dict_append(d2, "totalItems", cnt);
d1 = xs_dict_append(d1, "type", "Note");
d1 = xs_dict_append(d1, "name", v);
d1 = xs_dict_append(d1, "replies", d2);
nopts = xs_list_append(nopts, d1);
}
}
/* update the list */
msg = xs_dict_set(msg, xs_dict_get(msg, "oneOf") != NULL ? "oneOf" : "anyOf", nopts);
/* due date? */
int closed = 0;
const char *end_time = xs_dict_get(msg, "endTime");
if (!xs_is_null(end_time)) {
xs *now = xs_str_utctime(0, ISO_DATE_SPEC);
/* is now greater than the endTime? */
if (strcmp(now, end_time) >= 0) {
xs *et = xs_dup(end_time);
msg = xs_dict_set(msg, "closed", et);
closed = 1;
}
}
/* update the count of voters */
xs *vcnt = xs_number_new(xs_list_len(rcpts));
msg = xs_dict_set(msg, "votersCount", vcnt);
msg = xs_dict_set(msg, "cc", rcpts);
/* store */
object_add_ow(id, msg);
snac_debug(user, 1, xs_fmt("recounted poll %s", id));
timeline_touch(user);
/* send an update message to all voters */
xs *u_msg = msg_update(user, msg);
u_msg = xs_dict_set(u_msg, "cc", rcpts);
enqueue_message(user, u_msg);
if (closed) {
xs *c_msg = msg_update(user, msg);
notify(user, "Update", "Question", user->actor, c_msg);
}
return 0;
}
/** queues **/
int process_input_message(snac *snac, const xs_dict *msg, const xs_dict *req)
/* processes an ActivityPub message from the input queue */
/* return values: -1, fatal error; 0, transient error, retry;
1, processed and done; 2, propagate to users (only when no user is set) */
{
const char *actor = xs_dict_get(msg, "actor");
const char *type = xs_dict_get(msg, "type");
xs *actor_o = NULL;
int a_status;
int do_notify = 0;
if (xs_is_null(actor) || *actor == '\0') {
srv_debug(0, xs_fmt("malformed message (bad actor)"));
return -1;
}
/* question votes may not have a type */
if (xs_is_null(type))
type = "Note";
/* reject uninteresting messages right now */
if (xs_match(type, "Add|View|Reject|Read|Remove")) {
srv_debug(0, xs_fmt("Ignored message of type '%s'", type));
return -1;
}
const char *object, *utype;
object = xs_dict_get(msg, "object");
if (object != NULL && xs_type(object) == XSTYPE_DICT)
utype = xs_dict_get(object, "type");
else
utype = "(null)";
/* special case for Delete messages */
if (strcmp(type, "Delete") == 0) {
/* if the actor is not here, do not even try */
if (!object_here(actor)) {
srv_debug(1, xs_fmt("dropped 'Delete' message from unknown actor '%s'", actor));
return -1;
}
/* discard crap */
if (xs_is_null(object)) {
srv_log(xs_fmt("dropped 'Delete' message with invalid object from actor '%s'", actor));
return -1;
}
/* also discard if the object to be deleted is not here */
const char *obj_id = object;
if (xs_type(obj_id) == XSTYPE_DICT)
obj_id = xs_dict_get(obj_id, "id");
if (xs_is_null(obj_id) || !object_here(obj_id)) {
srv_debug(1, xs_fmt("dropped 'Delete' message from unknown object '%s'", obj_id));
return -1;
}
}
/* bring the actor */
a_status = actor_request(snac, actor, &actor_o);
/* do not retry permanent failures */
if (a_status == HTTP_STATUS_NOT_FOUND
|| a_status == HTTP_STATUS_GONE
|| a_status < 0) {
srv_debug(1, xs_fmt("dropping message due to actor error %s %d", actor, a_status));
return -1;
}
if (!valid_status(a_status)) {
/* do not retry 'Delete' messages */
if (strcmp(type, "Delete") == 0) {
srv_debug(1, xs_fmt("dropping 'Delete' message due to actor error %s %d", actor, a_status));
return -1;
}
/* other actor download errors */
/* the actor may require a signed request; propagate if no user is set */
if (snac == NULL)
return 2;
/* may need a retry */
srv_debug(0, xs_fmt("error requesting actor %s %d -- retry later", actor, a_status));
return 0;
}
/* check the signature */
xs *sig_err = NULL;
if (!check_signature(req, &sig_err)) {
srv_log(xs_fmt("bad signature %s (%s)", actor, sig_err));
srv_archive_error("check_signature", sig_err, req, msg);
return -1;
}
/* if no user is set, no further checks can be done; propagate */
if (snac == NULL)
return 2;
/* reject messages that are not for this user */
if (!is_msg_for_me(snac, msg)) {
snac_debug(snac, 1, xs_fmt("message from %s of type '%s' not for us", actor, type));
return 1;
}
/* if it's a DM from someone we don't follow, reject the message */
if (xs_type(xs_dict_get(snac->config, "drop_dm_from_unknown")) == XSTYPE_TRUE) {
if (strcmp(utype, "Note") == 0 && !is_msg_public(msg) &&
!following_check(snac, actor)) {
snac_log(snac, xs_fmt("DM rejected from unknown actor %s", actor));
return 1;
}
}
/* check the minimum acceptable account age */
int min_account_age = xs_number_get(xs_dict_get(srv_config, "min_account_age"));
if (min_account_age > 0) {
const char *actor_date = xs_dict_get(actor_o, "published");
if (!xs_is_null(actor_date)) {
time_t actor_t = xs_parse_iso_date(actor_date, 0);
if (actor_t < 950000000) {
snac_log(snac, xs_fmt("rejected activity from %s (suspicious date, %s)",
actor, actor_date));
return 1;
}
if (actor_t > 0) {
int td = (int)(time(NULL) - actor_t);
snac_debug(snac, 2, xs_fmt("actor %s age: %d seconds", actor, td));
if (td < min_account_age) {
snac_log(snac, xs_fmt("rejected activity from %s (too new, %d seconds)",
actor, td));
return 1;
}
}
}
else
snac_debug(snac, 1, xs_fmt("warning: empty or null creation date for %s", actor));
}
if (strcmp(type, "Follow") == 0) { /** **/
const char *id = xs_dict_get(msg, "id");
if (xs_is_null(id)) {
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
}
else
if (!follower_check(snac, actor)) {
/* ensure the actor object is here */
if (!object_here(actor)) {
xs *actor_obj = NULL;
actor_request(snac, actor, &actor_obj);
object_add(actor, actor_obj);
}
xs *f_msg = xs_dup(msg);
xs *reply = msg_accept(snac, f_msg, actor);
post_message(snac, actor, reply);
if (xs_is_null(xs_dict_get(f_msg, "published"))) {
/* add a date if it doesn't include one (Mastodon) */
xs *date = xs_str_utctime(0, ISO_DATE_SPEC);
f_msg = xs_dict_set(f_msg, "published", date);
}
timeline_add(snac, id, f_msg);
follower_add(snac, actor);
snac_log(snac, xs_fmt("new follower %s", actor));
do_notify = 1;
}
else
snac_log(snac, xs_fmt("repeated 'Follow' from %s", actor));
}
else
if (strcmp(type, "Undo") == 0) { /** **/
const char *id = xs_dict_get(object, "object");
if (xs_type(object) != XSTYPE_DICT)
utype = "Follow";
if (strcmp(utype, "Follow") == 0) { /** **/
if (id && strcmp(id, snac->actor) != 0)
snac_debug(snac, 1, xs_fmt("Undo + Follow from %s not for us (%s)", actor, id));
else {
if (valid_status(follower_del(snac, actor))) {
snac_log(snac, xs_fmt("no longer following us %s", actor));
do_notify = 1;
}
else
snac_log(snac, xs_fmt("error deleting follower %s", actor));
}
}
else
if (strcmp(utype, "Like") == 0 || strcmp(utype, "EmojiReact") == 0) { /** **/
int status = object_unadmire(id, actor, 1);
snac_log(snac, xs_fmt("Undo '%s' for %s %d", utype, id, status));
}
else
if (strcmp(utype, "Announce") == 0) { /** **/
int status = HTTP_STATUS_OK;
/* commented out: if a followed user boosts something that
is requested and then unboosts, the post remains here,
but with no apparent reason, and that is confusing */
//status = object_unadmire(id, actor, 0);
snac_log(snac, xs_fmt("Unboost for %s %d", id, status));
}
else
snac_debug(snac, 1, xs_fmt("ignored 'Undo' for object type '%s'", utype));
}
else
if (strcmp(type, "Create") == 0) { /** **/
if (is_muted(snac, actor)) {
snac_log(snac, xs_fmt("ignored 'Create' + '%s' from muted actor %s", utype, actor));
return 1;
}
if (xs_match(utype, "Note|Article")) { /** **/
const char *id = xs_dict_get(object, "id");
const char *in_reply_to = get_in_reply_to(object);
const char *atto = get_atto(object);
xs *wrk = NULL;
if (xs_is_null(id))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (xs_is_null(atto))
snac_log(snac, xs_fmt("malformed message: no 'attributedTo' field"));
else
if (!xs_is_null(in_reply_to) && is_hidden(snac, in_reply_to)) {
snac_debug(snac, 0, xs_fmt("dropped reply %s to hidden post %s", id, in_reply_to));
}
else {
if (content_match("filter_reject.txt", object)) {
snac_log(snac, xs_fmt("rejected by content %s", id));
return 1;
}
if (strcmp(actor, atto) != 0)
snac_log(snac, xs_fmt("SUSPICIOUS: actor != atto (%s != %s)", actor, atto));
timeline_request(snac, &in_reply_to, &wrk, 0);
if (timeline_add(snac, id, object)) {
snac_log(snac, xs_fmt("new '%s' %s %s", utype, actor, id));
do_notify = 1;
}
/* if it has a "name" field, it may be a vote for a question */
const char *name = xs_dict_get(object, "name");
if (!xs_is_null(name) && *name && !xs_is_null(in_reply_to) && *in_reply_to)
update_question(snac, in_reply_to);
}
}
else
if (strcmp(utype, "Question") == 0) { /** **/
const char *id = xs_dict_get(object, "id");
if (xs_is_null(id))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (timeline_add(snac, id, object))
snac_log(snac, xs_fmt("new 'Question' %s %s", actor, id));
}
else
if (strcmp(utype, "Video") == 0) { /** **/
const char *id = xs_dict_get(object, "id");
if (xs_is_null(id))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (timeline_add(snac, id, object))
snac_log(snac, xs_fmt("new 'Video' %s %s", actor, id));
}
else
snac_debug(snac, 1, xs_fmt("ignored 'Create' for object type '%s'", utype));
}
else
if (strcmp(type, "Accept") == 0) { /** **/
if (strcmp(utype, "(null)") == 0) {
const char *obj_id = xs_dict_get(msg, "object");
/* if the accepted object id is a string that may
be created by us, it's a follow */
if (xs_type(obj_id) == XSTYPE_STRING &&
xs_startswith(obj_id, srv_baseurl) &&
xs_endswith(obj_id, "/Follow"))
utype = "Follow";
}
if (strcmp(utype, "Follow") == 0) { /** **/
if (following_check(snac, actor)) {
following_add(snac, actor, msg);
snac_log(snac, xs_fmt("confirmed follow from %s", actor));
}
else
snac_log(snac, xs_fmt("spurious follow accept from %s", actor));
}
else
if (strcmp(utype, "Create") == 0) {
/* some implementations send Create confirmations, go figure */
snac_debug(snac, 1, xs_dup("ignored 'Accept' + 'Create'"));
}
else {
srv_archive_error("accept", "ignored Accept", req, msg);
snac_debug(snac, 1, xs_fmt("ignored 'Accept' for object type '%s'", utype));
}
}
else
if (strcmp(type, "Like") == 0 || strcmp(type, "EmojiReact") == 0) { /** **/
if (xs_type(object) == XSTYPE_DICT)
object = xs_dict_get(object, "id");
if (xs_is_null(object))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (timeline_admire(snac, object, actor, 1) == HTTP_STATUS_CREATED)
snac_log(snac, xs_fmt("new '%s' %s %s", type, actor, object));
else
snac_log(snac, xs_fmt("repeated '%s' from %s to %s", type, actor, object));
do_notify = 1;
}
else
if (strcmp(type, "Announce") == 0) { /** **/
if (xs_type(object) == XSTYPE_DICT)
object = xs_dict_get(object, "id");
if (xs_is_null(object))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (is_muted(snac, actor) && !xs_startswith(object, snac->actor))
snac_log(snac, xs_fmt("dropped 'Announce' from muted actor %s", actor));
else
if (is_limited(snac, actor) && !xs_startswith(object, snac->actor))
snac_log(snac, xs_fmt("dropped 'Announce' from limited actor %s", actor));
else {
xs *a_msg = NULL;
xs *wrk = NULL;
timeline_request(snac, &object, &wrk, 0);
if (valid_status(object_get(object, &a_msg))) {
const char *who = get_atto(a_msg);
if (who && !is_muted(snac, who)) {
/* bring the actor */
xs *who_o = NULL;
if (valid_status(actor_request(snac, who, &who_o))) {
if (timeline_admire(snac, object, actor, 0) == HTTP_STATUS_CREATED)
snac_log(snac, xs_fmt("new 'Announce' %s %s", actor, object));
else
snac_log(snac, xs_fmt("repeated 'Announce' from %s to %s",
actor, object));
/* distribute the post with the actor as 'proxy' */
list_distribute(snac, actor, a_msg);
do_notify = 1;
}
else
snac_debug(snac, 1, xs_fmt("dropped 'Announce' on actor request error %s", who));
}
else
snac_log(snac, xs_fmt("ignored 'Announce' about muted actor %s", who));
}
else
snac_debug(snac, 2, xs_fmt("error requesting 'Announce' object %s", object));
}
}
else
if (strcmp(type, "Update") == 0) { /** **/
if (xs_match(utype, "Person|Service")) { /** **/
actor_add(actor, xs_dict_get(msg, "object"));
timeline_touch(snac);
snac_log(snac, xs_fmt("updated actor %s", actor));
}
else
if (xs_match(utype, "Note|Page|Article|Video")) { /** **/
const char *id = xs_dict_get(object, "id");
if (xs_is_null(id))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (object_here(id)) {
object_add_ow(id, object);
timeline_touch(snac);
snac_log(snac, xs_fmt("updated '%s' %s", utype, id));
}
else
snac_log(snac, xs_fmt("dropped update for unknown '%s' %s", utype, id));
}
else
if (strcmp(utype, "Question") == 0) { /** **/
const char *id = xs_dict_get(object, "id");
const char *closed = xs_dict_get(object, "closed");
if (xs_is_null(id))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else {
object_add_ow(id, object);
timeline_touch(snac);
snac_log(snac, xs_fmt("%s poll %s", closed == NULL ? "updated" : "closed", id));
if (closed != NULL)
do_notify = 1;
}
}
else {
srv_archive_error("unsupported_update", "unsupported_update", req, msg);
snac_log(snac, xs_fmt("ignored 'Update' for object type '%s'", utype));
}
}
else
if (strcmp(type, "Delete") == 0) { /** **/
if (xs_type(object) == XSTYPE_DICT)
object = xs_dict_get(object, "id");
if (xs_is_null(object))
snac_log(snac, xs_fmt("malformed message: no 'id' field"));
else
if (object_here(object)) {
timeline_del(snac, object);
snac_debug(snac, 1, xs_fmt("new 'Delete' %s %s", actor, object));
}
else
snac_debug(snac, 1, xs_fmt("ignored 'Delete' for unknown object %s", object));
}
else
if (strcmp(type, "Pong") == 0) { /** **/
snac_log(snac, xs_fmt("'Pong' received from %s", actor));
}
else
if (strcmp(type, "Ping") == 0) { /** **/
const char *id = xs_dict_get(msg, "id");
snac_log(snac, xs_fmt("'Ping' requested from %s", actor));
if (!xs_is_null(id)) {
xs *rsp = msg_pong(snac, actor, id);
enqueue_output_by_actor(snac, rsp, actor, 0);
}
}
else
if (strcmp(type, "Block") == 0) { /** **/
snac_debug(snac, 1, xs_fmt("'Block' received from %s", actor));
/* should we MUTE the actor back? */
/* mute(snac, actor); */
if (!xs_is_true(xs_dict_get(srv_config, "disable_block_notifications")))
do_notify = 1;
}
else
if (strcmp(type, "Move") == 0) { /** **/
do_notify = 1;
const char *old_account = xs_dict_get(msg, "object");
const char *new_account = xs_dict_get(msg, "target");
if (!xs_is_null(old_account) && !xs_is_null(new_account)) {
if (following_check(snac, old_account)) {
xs *n_actor = NULL;
if (valid_status(object_get(new_account, &n_actor))) {
const xs_list *aka = xs_dict_get(n_actor, "alsoKnownAs");
if (xs_type(aka) == XSTYPE_LIST) {
if (xs_list_in(aka, old_account) != -1) {
/* all conditions met! */
/* follow new account */
xs *f_msg = msg_follow(snac, new_account);
if (f_msg != NULL) {
const char *new_actor = xs_dict_get(f_msg, "object");
following_add(snac, new_actor, f_msg);
enqueue_output_by_actor(snac, f_msg, new_actor, 0);
snac_log(snac, xs_fmt("'Move': following %s", new_account));
}
/* unfollow old account */
xs *of_msg = NULL;
if (valid_status(following_get(snac, old_account, &of_msg))) {
xs *uf_msg = msg_undo(snac, xs_dict_get(of_msg, "object"));
following_del(snac, old_account);
enqueue_output_by_actor(snac, uf_msg, old_account, 0);
snac_log(snac, xs_fmt("'Move': unfollowing %s", old_account));
}
}
else
snac_log(snac, xs_fmt("'Move' error: old actor %s not found in %s 'alsoKnownAs'",
old_account, new_account));
}
else
snac_log(snac, xs_fmt("'Move' error: cannot get %s 'alsoKnownAs'", new_account));
}
else {
snac_log(snac, xs_fmt("'Move' error: cannot get new actor %s", new_account));
/* may be a server hiccup, retry later */
return 0;
}
}
else
snac_log(snac, xs_fmt("'Move' error: actor %s is not being followed", old_account));
}
else {
snac_log(snac, xs_fmt("'Move' error: malformed message from %s", actor));
srv_archive_error("move", "move", req, msg);
}
}
else {
srv_archive_error("unsupported_type", "unsupported_type", req, msg);
snac_debug(snac, 1, xs_fmt("process_input_message type '%s' ignored", type));
}
if (do_notify) {
notify(snac, type, utype, actor, msg);
timeline_touch(snac);
}
return 1;
}
int send_email(const char *msg)
/* invoke sendmail with email headers and body in msg */
{
FILE *f;
int status;
int fds[2];
pid_t pid;
if (pipe(fds) == -1) return -1;
pid = vfork();
if (pid == -1) return -1;
else if (pid == 0) {
dup2(fds[0], 0);
close(fds[0]);
close(fds[1]);
execl("/usr/sbin/sendmail", "sendmail", "-t", (char *) NULL);
_exit(1);
}
close(fds[0]);
if ((f = fdopen(fds[1], "w")) == NULL) {
close(fds[1]);
return -1;
}
fprintf(f, "%s\n", msg);
fclose(f);
if (waitpid(pid, &status, 0) == -1) return -1;
return status;
}
void process_user_queue_item(snac *snac, xs_dict *q_item)
/* processes an item from the user queue */
{
const char *type;
int queue_retry_max = xs_number_get(xs_dict_get(srv_config, "queue_retry_max"));
if ((type = xs_dict_get(q_item, "type")) == NULL)
type = "output";
if (strcmp(type, "message") == 0) {
const xs_dict *msg = xs_dict_get(q_item, "message");
xs *rcpts = recipient_list(snac, msg, 1);
xs_set inboxes;
const xs_str *actor;
int c;
xs_set_init(&inboxes);
/* iterate the recipients */
c = 0;
while (xs_list_next(rcpts, &actor, &c)) {
xs *inbox = get_actor_inbox(actor, 1);
if (inbox != NULL) {
/* add to the set and, if it's not there, send message */
if (xs_set_add(&inboxes, inbox) == 1)
enqueue_output(snac, msg, inbox, 0, 0);
}
else
snac_log(snac, xs_fmt("cannot find inbox for %s", actor));
}
/* if it's a public note or question, send to the collected inboxes */
if (xs_match(xs_dict_get_def(msg, "type", ""), "Create|Update") && is_msg_public(msg)) {
if (xs_type(xs_dict_get(srv_config, "disable_inbox_collection")) != XSTYPE_TRUE) {
xs *shibx = inbox_list();
const xs_str *inbox;
c = 0;
while (xs_list_next(shibx, &inbox, &c)) {
if (xs_set_add(&inboxes, inbox) == 1)
enqueue_output(snac, msg, inbox, 0, 0);
}
}
}
xs_set_free(&inboxes);
}
else
if (strcmp(type, "input") == 0) {
/* process the message */
const xs_dict *msg = xs_dict_get(q_item, "message");
const xs_dict *req = xs_dict_get(q_item, "req");
int retries = xs_number_get(xs_dict_get(q_item, "retries"));
if (xs_is_null(msg))
return;
if (!process_input_message(snac, msg, req)) {
if (retries > queue_retry_max)
snac_log(snac, xs_fmt("input giving up"));
else {
/* reenqueue */
enqueue_input(snac, msg, req, retries + 1);
snac_log(snac, xs_fmt("input requeue #%d", retries + 1));
}
}
}
else
if (strcmp(type, "close_question") == 0) {
/* the time for this question has ended */
const char *id = xs_dict_get(q_item, "message");
if (!xs_is_null(id))
update_question(snac, id);
}
else
if (strcmp(type, "object_request") == 0) {
const char *id = xs_dict_get(q_item, "message");
if (!xs_is_null(id)) {
int status;
xs *data = NULL;
status = activitypub_request(snac, id, &data);
if (valid_status(status))
object_add_ow(id, data);
snac_debug(snac, 1, xs_fmt("object_request %s %d", id, status));
}
}
else
if (strcmp(type, "verify_links") == 0) {
verify_links(snac);
}
else
if (strcmp(type, "actor_refresh") == 0) {
const char *actor = xs_dict_get(q_item, "actor");
double mtime = object_mtime(actor);
/* only refresh if it was refreshed more than an hour ago */
if (mtime + 3600.0 < (double) time(NULL)) {
xs *actor_o = NULL;
int status;
if (valid_status((status = activitypub_request(snac, actor, &actor_o))))
actor_add(actor, actor_o);
else
object_touch(actor);
snac_log(snac, xs_fmt("actor_refresh %s %d", actor, status));
}
}
else
snac_log(snac, xs_fmt("unexpected user q_item type '%s'", type));
}
int process_user_queue(snac *snac)
/* processes a user's queue */
{
int cnt = 0;
xs *list = user_queue(snac);
xs_list *p = list;
const xs_str *fn;
while (xs_list_iter(&p, &fn)) {
xs *q_item = dequeue(fn);
if (q_item == NULL)
continue;
process_user_queue_item(snac, q_item);
cnt++;
}
return cnt;
}
void process_queue_item(xs_dict *q_item)
/* processes an item from the global queue */
{
const char *type = xs_dict_get(q_item, "type");
int queue_retry_max = xs_number_get(xs_dict_get(srv_config, "queue_retry_max"));
if (strcmp(type, "output") == 0) {
int status;
const xs_str *inbox = xs_dict_get(q_item, "inbox");
const xs_str *keyid = xs_dict_get(q_item, "keyid");
const xs_str *seckey = xs_dict_get(q_item, "seckey");
const xs_dict *msg = xs_dict_get(q_item, "message");
int retries = xs_number_get(xs_dict_get(q_item, "retries"));
int p_status = xs_number_get(xs_dict_get(q_item, "p_status"));
xs *payload = NULL;
int p_size = 0;
int timeout = 0;
if (xs_is_null(inbox) || xs_is_null(msg) || xs_is_null(keyid) || xs_is_null(seckey)) {
srv_log(xs_fmt("output message error: missing fields"));
return;
}
if (is_instance_blocked(inbox)) {
srv_debug(0, xs_fmt("discarded output message to blocked instance %s", inbox));
return;
}
/* deliver (if previous error status was a timeout, try now longer) */
if (p_status == 599)
timeout = xs_number_get(xs_dict_get_def(srv_config, "queue_timeout_2", "8"));
else
timeout = xs_number_get(xs_dict_get_def(srv_config, "queue_timeout", "6"));
if (timeout == 0)
timeout = 6;
status = send_to_inbox_raw(keyid, seckey, inbox, msg, &payload, &p_size, timeout);
if (payload) {
if (p_size > 64) {
/* trim the message */
payload[64] = '\0';
payload = xs_str_cat(payload, "...");
}
/* strip ugly control characters */
payload = xs_replace_i(payload, "\n", "");
payload = xs_replace_i(payload, "\r", "");
if (*payload)
payload = xs_str_wrap_i(" [", payload, "]");
}
else
payload = xs_str_new(NULL);
srv_log(xs_fmt("output message: sent to inbox %s %d%s", inbox, status, payload));
if (!valid_status(status)) {
retries++;
/* if it's not the first time it fails with a timeout,
penalize the server by skipping one retry */
if (p_status == status && status == HTTP_STATUS_CLIENT_CLOSED_REQUEST)
retries++;
/* error sending; requeue? */
if (status == HTTP_STATUS_BAD_REQUEST
|| status == HTTP_STATUS_NOT_FOUND
|| status == HTTP_STATUS_METHOD_NOT_ALLOWED
|| status == HTTP_STATUS_GONE
|| status == HTTP_STATUS_UNPROCESSABLE_CONTENT
|| status < 0)
/* explicit error: discard */
srv_log(xs_fmt("output message: fatal error %s %d", inbox, status));
else
if (retries > queue_retry_max)
srv_log(xs_fmt("output message: giving up %s %d", inbox, status));
else {
/* requeue */
enqueue_output_raw(keyid, seckey, msg, inbox, retries, status);
srv_log(xs_fmt("output message: requeue %s #%d", inbox, retries));
}
}
}
else
if (strcmp(type, "email") == 0) {
/* send this email */
const xs_str *msg = xs_dict_get(q_item, "message");
int retries = xs_number_get(xs_dict_get(q_item, "retries"));
if (!send_email(msg))
srv_debug(1, xs_fmt("email message sent"));
else {
retries++;
if (retries > queue_retry_max)
srv_log(xs_fmt("email giving up (errno: %d)", errno));
else {
/* requeue */
srv_log(xs_fmt(
"email requeue #%d (errno: %d)", retries, errno));
enqueue_email(msg, retries);
}
}
}
else
if (strcmp(type, "telegram") == 0) {
/* send this via telegram */
const char *bot = xs_dict_get(q_item, "bot");
const char *msg = xs_dict_get(q_item, "message");
xs *chat_id = xs_dup(xs_dict_get(q_item, "chat_id"));
int status = 0;
/* chat_id must start with a - */
if (!xs_startswith(chat_id, "-"))
chat_id = xs_str_wrap_i("-", chat_id, NULL);
xs *url = xs_fmt("https:/" "/api.telegram.org/bot%s/sendMessage", bot);
xs *body = xs_fmt("{\"chat_id\":%s,\"text\":\"%s\"}", chat_id, msg);
xs *headers = xs_dict_new();
headers = xs_dict_append(headers, "content-type", "application/json");
xs *rsp = xs_http_request("POST", url, headers,
body, strlen(body), &status, NULL, NULL, 0);
rsp = xs_free(rsp);
srv_debug(0, xs_fmt("telegram post %d", status));
}
else
if (strcmp(type, "ntfy") == 0) {
/* send this via ntfy */
const char *ntfy_server = xs_dict_get(q_item, "ntfy_server");
const char *msg = xs_dict_get(q_item, "message");
const char *ntfy_token = xs_dict_get(q_item, "ntfy_token");
int status = 0;
xs *url = xs_fmt("%s", ntfy_server);
xs *body = xs_fmt("%s", msg);
xs *headers = xs_dict_new();
headers = xs_dict_append(headers, "content-type", "text/plain");
// Append the Authorization header only if ntfy_token is not NULL
if (ntfy_token != NULL) {
headers = xs_dict_append(headers, "Authorization", xs_fmt("Bearer %s", ntfy_token));
}
xs *rsp = xs_http_request("POST", url, headers,
body, strlen(body), &status, NULL, NULL, 0);
rsp = xs_free(rsp);
srv_debug(0, xs_fmt("ntfy post %d", status));
}
else
if (strcmp(type, "purge") == 0) {
srv_log(xs_dup("purge start"));
purge_all();
srv_log(xs_dup("purge end"));
}
else
if (strcmp(type, "input") == 0) {
const xs_dict *msg = xs_dict_get(q_item, "message");
const xs_dict *req = xs_dict_get(q_item, "req");
int retries = xs_number_get(xs_dict_get(q_item, "retries"));
/* do some instance-level checks */
int r = process_input_message(NULL, msg, req);
if (r == 0) {
/* transient error? retry */
if (retries > queue_retry_max)
srv_log(xs_fmt("shared input giving up"));
else {
/* reenqueue */
enqueue_shared_input(msg, req, retries + 1);
srv_log(xs_fmt("shared input requeue #%d", retries + 1));
}
}
else
if (r == 2) {
/* redistribute the input message to all users */
const char *ntid = xs_dict_get(q_item, "ntid");
xs *tmpfn = xs_fmt("%s/tmp/%s.json", srv_basedir, ntid);
FILE *f;
if ((f = fopen(tmpfn, "w")) != NULL) {
xs_json_dump(q_item, 4, f);
fclose(f);
}
xs *users = user_list();
xs_list *p = users;
const char *v;
int cnt = 0;
while (xs_list_iter(&p, &v)) {
snac user;
if (user_open(&user, v)) {
if (is_msg_for_me(&user, msg)) {
xs *fn = xs_fmt("%s/queue/%s.json", user.basedir, ntid);
snac_debug(&user, 1,
xs_fmt("enqueue_input (from shared inbox) %s", xs_dict_get(msg, "id")));
if (link(tmpfn, fn) < 0)
srv_log(xs_fmt("link(%s, %s) error", tmpfn, fn));
cnt++;
}
user_free(&user);
}
}
unlink(tmpfn);
if (cnt == 0) {
srv_debug(1, xs_fmt("no valid recipients for %s", xs_dict_get(msg, "id")));
}
}
}
else
srv_log(xs_fmt("unexpected q_item type '%s'", type));
}
int process_queue(void)
/* processes the global queue */
{
int cnt = 0;
xs *list = queue();
xs_list *p = list;
const xs_str *fn;
while (xs_list_iter(&p, &fn)) {
xs *q_item = dequeue(fn);
if (q_item != NULL) {
job_post(q_item, 0);
cnt++;
}
}
return cnt;
}
/** account migration **/
int migrate_account(snac *user)
/* migrates this account to a new one (stored in the 'alias' user field) */
{
const char *new_account = xs_dict_get(user->config, "alias");
if (xs_type(new_account) != XSTYPE_STRING) {
snac_log(user, xs_fmt("Cannot migrate: alias (destination account) not set"));
return 1;
}
xs *new_actor = NULL;
int status;
if (!valid_status(status = activitypub_request(user, new_account, &new_actor))) {
snac_log(user, xs_fmt("Cannot migrate: error requesting actor %s %d", new_account, status));
return 1;
}
actor_add(new_account, new_actor);
const char *loaka = xs_dict_get(new_actor, "alsoKnownAs");
if (xs_type(loaka) != XSTYPE_LIST) {
snac_log(user, xs_fmt("Cannot migrate: destination account doesn't have any aliases"));
return 1;
}
if (xs_list_in(loaka, user->actor) == -1) {
snac_log(user, xs_fmt("Cannot migrate: destination account doesn't have this one as an alias"));
return 1;
}
xs *move = msg_move(user, new_account);
xs *fwers = follower_list(user);
const char *actor;
xs_list_foreach(fwers, actor) {
/* get the actor inbox, excluding the shared one */
xs *inbox = get_actor_inbox(actor, 0);
if (xs_is_null(inbox))
snac_log(user, xs_fmt("migrate_account: cannot get inbox for actor %s", actor));
else
enqueue_output(user, move, inbox, 0, 0);
}
return 0;
}
/** HTTP handlers */
int activitypub_get_handler(const xs_dict *req, const char *q_path,
char **body, int *b_size, char **ctype)
{
int status = HTTP_STATUS_OK;
const char *accept = xs_dict_get(req, "accept");
snac snac;
xs *msg = NULL;
if (accept == NULL)
return 0;
if (xs_str_in(accept, "application/activity+json") == -1 &&
xs_str_in(accept, "application/ld+json") == -1)
return 0;
xs *l = xs_split_n(q_path, "/", 2);
const char *uid;
const char *p_path;
uid = xs_list_get(l, 1);
if (!user_open(&snac, uid)) {
/* invalid user */
srv_debug(1, xs_fmt("activitypub_get_handler bad user %s", uid));
return HTTP_STATUS_NOT_FOUND;
}
p_path = xs_list_get(l, 2);
*ctype = "application/activity+json";
if (p_path == NULL) {
/* if there was no component after the user, it's an actor request */
msg = msg_actor(&snac);
*ctype = "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"";
const char *ua = xs_dict_get(req, "user-agent");
snac_debug(&snac, 0, xs_fmt("serving actor [%s]", ua ? ua : "No UA"));
}
else
if (strcmp(p_path, "outbox") == 0 || strcmp(p_path, "featured") == 0) {
xs *id = xs_fmt("%s/%s", snac.actor, p_path);
xs *list = xs_list_new();
msg = msg_collection(&snac, id);
const char *v;
int tc = 0;
/* get the public outbox or the pinned list */
xs *elems = *p_path == 'o' ? timeline_simple_list(&snac, "public", 0, 20) : pinned_list(&snac);
while (xs_list_next(elems, &v, &tc)) {
xs *i = NULL;
if (valid_status(object_get_by_md5(v, &i))) {
const char *type = xs_dict_get(i, "type");
const char *id = xs_dict_get(i, "id");
if (type && id && strcmp(type, "Note") == 0 && xs_startswith(id, snac.actor)) {
xs *c_msg = msg_create(&snac, i);
list = xs_list_append(list, c_msg);
}
}
}
/* replace the 'orderedItems' with the latest posts */
xs *items = xs_number_new(xs_list_len(list));
msg = xs_dict_set(msg, "orderedItems", list);
msg = xs_dict_set(msg, "totalItems", items);
}
else
if (strcmp(p_path, "followers") == 0 || strcmp(p_path, "following") == 0) {
xs *id = xs_fmt("%s/%s", snac.actor, p_path);
msg = msg_collection(&snac, id);
}
else
if (xs_startswith(p_path, "p/")) {
xs *id = xs_fmt("%s/%s", snac.actor, p_path);
status = object_get(id, &msg);
/* don't return non-public objects */
if (valid_status(status) && !is_msg_public(msg))
status = HTTP_STATUS_NOT_FOUND;
}
else
status = HTTP_STATUS_NOT_FOUND;
if (status == HTTP_STATUS_OK && msg != NULL) {
*body = xs_json_dumps(msg, 4);
*b_size = strlen(*body);
}
snac_debug(&snac, 1, xs_fmt("activitypub_get_handler serving %s %d", q_path, status));
user_free(&snac);
return status;
}
int activitypub_post_handler(const xs_dict *req, const char *q_path,
char *payload, int p_size,
char **body, int *b_size, char **ctype)
/* processes an input message */
{
(void)b_size;
int status = HTTP_STATUS_ACCEPTED;
const char *i_ctype = xs_dict_get(req, "content-type");
snac snac;
const char *v;
if (i_ctype == NULL) {
*body = xs_str_new("no content-type");
*ctype = "text/plain";
return HTTP_STATUS_BAD_REQUEST;
}
if (xs_is_null(payload)) {
*body = xs_str_new("no payload");
*ctype = "text/plain";
return HTTP_STATUS_BAD_REQUEST;
}
if (xs_str_in(i_ctype, "application/activity+json") == -1 &&
xs_str_in(i_ctype, "application/ld+json") == -1)
return 0;
/* decode the message */
xs *msg = xs_json_loads(payload);
const char *id = xs_dict_get(msg, "id");
if (msg == NULL) {
srv_log(xs_fmt("activitypub_post_handler JSON error %s", q_path));
srv_archive_error("activitypub_post_handler", "JSON error", req, payload);
*body = xs_str_new("JSON error");
*ctype = "text/plain";
return HTTP_STATUS_BAD_REQUEST;
}
if (id && is_instance_blocked(id)) {
srv_debug(1, xs_fmt("full instance block for %s", id));
*body = xs_str_new("blocked");
*ctype = "text/plain";
return HTTP_STATUS_FORBIDDEN;
}
/* get the user and path */
xs *l = xs_split_n(q_path, "/", 2);
if (xs_list_len(l) == 2 && strcmp(xs_list_get(l, 1), "shared-inbox") == 0) {
enqueue_shared_input(msg, req, 0);
return HTTP_STATUS_ACCEPTED;
}
if (xs_list_len(l) != 3 || strcmp(xs_list_get(l, 2), "inbox") != 0) {
/* strange q_path */
srv_debug(1, xs_fmt("activitypub_post_handler unsupported path %s", q_path));
return HTTP_STATUS_NOT_FOUND;
}
const char *uid = xs_list_get(l, 1);
if (!user_open(&snac, uid)) {
/* invalid user */
srv_debug(1, xs_fmt("activitypub_post_handler bad user %s", uid));
return HTTP_STATUS_NOT_FOUND;
}
/* if it has a digest, check it now, because
later the payload won't be exactly the same */
if ((v = xs_dict_get(req, "digest")) != NULL) {
xs *s1 = xs_sha256_base64(payload, p_size);
xs *s2 = xs_fmt("SHA-256=%s", s1);
if (strcmp(s2, v) != 0) {
srv_log(xs_fmt("digest check FAILED"));
*body = xs_str_new("bad digest");
*ctype = "text/plain";
status = HTTP_STATUS_BAD_REQUEST;
}
}
/* if the message is from a muted actor, reject it right now */
if (!xs_is_null(v = xs_dict_get(msg, "actor")) && *v) {
if (is_muted(&snac, v)) {
snac_log(&snac, xs_fmt("rejected message from MUTEd actor %s", v));
*body = xs_str_new("rejected");
*ctype = "text/plain";
status = HTTP_STATUS_FORBIDDEN;
}
}
if (valid_status(status)) {
enqueue_input(&snac, msg, req, 0);
*ctype = "application/activity+json";
}
user_free(&snac);
return status;
}
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