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/* snac - A simple, minimalistic ActivityPub instance */
/* copyright (c) 2022 - 2024 grunfink et al. / MIT license */
#include "xs.h"
#include "xs_io.h"
#include "xs_json.h"
#include "xs_time.h"
#include "xs_openssl.h"
#include "snac.h"
#include <sys/stat.h>
int usage(void)
{
printf("snac " VERSION " - A simple, minimalistic ActivityPub instance\n");
printf("Copyright (c) 2022 - 2024 grunfink et al. / MIT license\n");
printf("\n");
printf("Commands:\n");
printf("\n");
printf("init [{basedir}] Initializes the data storage\n");
printf("upgrade {basedir} Upgrade to a new version\n");
printf("adduser {basedir} [{uid}] Adds a new user\n");
printf("deluser {basedir} {uid} Deletes a user\n");
printf("httpd {basedir} Starts the HTTPD daemon\n");
printf("purge {basedir} Purges old data\n");
printf("state {basedir} Prints server state\n");
printf("webfinger {basedir} {actor} Queries about an actor (@user@host or actor url)\n");
printf("queue {basedir} {uid} Processes a user queue\n");
printf("follow {basedir} {uid} {actor} Follows an actor\n");
printf("unfollow {basedir} {uid} {actor} Unfollows an actor\n");
printf("request {basedir} {uid} {url} Requests an object\n");
printf("actor {basedir} [{uid}] {url} Requests an actor\n");
printf("note {basedir} {uid} {text} [files...] Sends a note with optional attachments\n");
printf("boost|announce {basedir} {uid} {url} Boosts (announces) a post\n");
printf("unboost {basedir} {uid} {url} Unboosts a post\n");
printf("resetpwd {basedir} {uid} Resets the password of a user\n");
printf("ping {basedir} {uid} {actor} Pings an actor\n");
printf("webfinger_s {basedir} {uid} {actor} Queries about an actor (@user@host or actor url)\n");
printf("pin {basedir} {uid} {msg_url} Pins a message\n");
printf("unpin {basedir} {uid} {msg_url} Unpins a message\n");
printf("block {basedir} {instance_url} Blocks a full instance\n");
printf("unblock {basedir} {instance_url} Unblocks a full instance\n");
printf("limit {basedir} {uid} {actor} Limits an actor (drops their announces)\n");
printf("unlimit {basedir} {uid} {actor} Unlimits an actor\n");
printf("verify_links {basedir} {uid} Verifies a user's links (in the metadata)\n");
printf("search {basedir} {uid} {regex} Searches posts by content\n");
return 1;
}
char *get_argv(int *argi, int argc, char *argv[])
{
if (*argi < argc)
return argv[(*argi)++];
else
return NULL;
}
#define GET_ARGV() get_argv(&argi, argc, argv)
int main(int argc, char *argv[])
{
char *cmd;
char *basedir;
char *user;
char *url;
int argi = 1;
snac snac;
/* ensure group has write access */
umask(0007);
if ((cmd = GET_ARGV()) == NULL)
return usage();
if (strcmp(cmd, "init") == 0) { /** **/
/* initialize the data storage */
/* ... */
basedir = GET_ARGV();
return snac_init(basedir);
}
if (strcmp(cmd, "upgrade") == 0) { /** **/
int ret;
/* upgrade */
if ((basedir = GET_ARGV()) == NULL)
return usage();
if ((ret = srv_open(basedir, 1)) == 1)
srv_log(xs_dup("OK"));
return ret;
}
if (strcmp(cmd, "markdown") == 0) { /** **/
/* undocumented, for testing only */
xs *c = xs_readall(stdin);
xs *fc = not_really_markdown(c, NULL, NULL);
printf("<html>\n%s\n</html>\n", fc);
return 0;
}
if ((basedir = GET_ARGV()) == NULL)
return usage();
if (!srv_open(basedir, 0)) {
srv_log(xs_fmt("error opening data storage at %s", basedir));
return 1;
}
if (strcmp(cmd, "adduser") == 0) { /** **/
user = GET_ARGV();
return adduser(user);
return 0;
}
if (strcmp(cmd, "httpd") == 0) { /** **/
httpd();
srv_free();
return 0;
}
if (strcmp(cmd, "purge") == 0) { /** **/
purge_all();
return 0;
}
if (strcmp(cmd, "state") == 0) { /** **/
xs *shm_name = NULL;
srv_state *p_state = srv_state_op(&shm_name, 1);
if (p_state == NULL)
return 1;
srv_state ss = *p_state;
int n;
printf("server: %s (%s)\n", xs_dict_get(srv_config, "host"), USER_AGENT);
xs *uptime = xs_str_time_diff(time(NULL) - ss.srv_start_time);
printf("uptime: %s\n", uptime);
printf("job fifo size (cur): %d\n", ss.job_fifo_size);
printf("job fifo size (peak): %d\n", ss.peak_job_fifo_size);
char *th_states[] = { "stopped", "waiting", "input", "output" };
for (n = 0; n < ss.n_threads; n++)
printf("thread #%d state: %s\n", n, th_states[ss.th_state[n]]);
return 0;
}
if ((user = GET_ARGV()) == NULL)
return usage();
if (strcmp(cmd, "block") == 0) { /** **/
int ret = instance_block(user);
if (ret < 0) {
fprintf(stderr, "Error blocking instance %s: %d\n", user, ret);
return 1;
}
return 0;
}
if (strcmp(cmd, "unblock") == 0) { /** **/
int ret = instance_unblock(user);
if (ret < 0) {
fprintf(stderr, "Error unblocking instance %s: %d\n", user, ret);
return 1;
}
return 0;
}
if (strcmp(cmd, "webfinger") == 0) { /** **/
xs *actor = NULL;
xs *uid = NULL;
int status;
status = webfinger_request(user, &actor, &uid);
printf("status: %d\n", status);
if (actor != NULL)
printf("actor: %s\n", actor);
if (uid != NULL)
printf("uid: %s\n", uid);
return 0;
}
if (argi == argc && strcmp(cmd, "actor") == 0) { /** **/
/* query an actor without user (non-signed) */
xs *actor = NULL;
int status;
status = actor_request(NULL, user, &actor);
printf("status: %d\n", status);
if (valid_status(status)) {
xs_json_dump(actor, 4, stdout);
printf("\n");
}
return 0;
}
if (!user_open(&snac, user)) {
printf("invalid user '%s'\n", user);
return 1;
}
lastlog_write(&snac, "cmdline");
if (strcmp(cmd, "resetpwd") == 0) { /** **/
return resetpwd(&snac);
}
if (strcmp(cmd, "deluser") == 0) { /** **/
return deluser(&snac);
}
if (strcmp(cmd, "update") == 0) { /** **/
xs *a_msg = msg_actor(&snac);
xs *u_msg = msg_update(&snac, a_msg);
enqueue_message(&snac, u_msg);
return 0;
}
if (strcmp(cmd, "queue") == 0) { /** **/
process_user_queue(&snac);
return 0;
}
if (strcmp(cmd, "verify_links") == 0) { /** **/
verify_links(&snac);
return 0;
}
if (strcmp(cmd, "timeline") == 0) { /** **/
#if 0
xs *list = local_list(&snac, XS_ALL);
xs *body = html_timeline(&snac, list, 1);
printf("%s\n", body);
user_free(&snac);
srv_free();
#endif
xs *idx = xs_fmt("%s/private.idx", snac.basedir);
xs *list = index_list_desc(idx, 0, 256);
xs *tl = timeline_top_level(&snac, list);
xs_json_dump(tl, 4, stdout);
return 0;
}
if ((url = GET_ARGV()) == NULL)
return usage();
if (strcmp(cmd, "webfinger_s") == 0) { /** **/
xs *actor = NULL;
xs *uid = NULL;
int status;
status = webfinger_request_signed(&snac, url, &actor, &uid);
printf("status: %d\n", status);
if (actor != NULL)
printf("actor: %s\n", actor);
if (uid != NULL)
printf("uid: %s\n", uid);
return 0;
}
if (strcmp(cmd, "boost") == 0 || strcmp(cmd, "announce") == 0) { /** **/
xs *msg = msg_admiration(&snac, url, "Announce");
if (msg != NULL) {
enqueue_message(&snac, msg);
if (dbglevel) {
xs_json_dump(msg, 4, stdout);
}
}
return 0;
}
if (strcmp(cmd, "unboost") == 0) { /** **/
xs *msg = msg_repulsion(&snac, url, "Announce");
if (msg != NULL) {
enqueue_message(&snac, msg);
if (dbglevel) {
xs_json_dump(msg, 4, stdout);
}
}
return 0;
}
if (strcmp(cmd, "follow") == 0) { /** **/
xs *msg = msg_follow(&snac, url);
if (msg != NULL) {
char *actor = xs_dict_get(msg, "object");
following_add(&snac, actor, msg);
enqueue_output_by_actor(&snac, msg, actor, 0);
if (dbglevel) {
xs_json_dump(msg, 4, stdout);
}
}
return 0;
}
if (strcmp(cmd, "unfollow") == 0) { /** **/
xs *object = NULL;
if (valid_status(following_get(&snac, url, &object))) {
xs *msg = msg_undo(&snac, xs_dict_get(object, "object"));
following_del(&snac, url);
enqueue_output_by_actor(&snac, msg, url, 0);
snac_log(&snac, xs_fmt("unfollowed actor %s", url));
}
else
snac_log(&snac, xs_fmt("actor is not being followed %s", url));
return 0;
}
if (strcmp(cmd, "limit") == 0) { /** **/
int ret;
if (!following_check(&snac, url))
snac_log(&snac, xs_fmt("actor %s is not being followed", url));
else
if ((ret = limit(&snac, url)) == 0)
snac_log(&snac, xs_fmt("actor %s is now limited", url));
else
snac_log(&snac, xs_fmt("error limiting actor %s (%d)", url, ret));
return 0;
}
if (strcmp(cmd, "unlimit") == 0) { /** **/
int ret;
if (!following_check(&snac, url))
snac_log(&snac, xs_fmt("actor %s is not being followed", url));
else
if ((ret = unlimit(&snac, url)) == 0)
snac_log(&snac, xs_fmt("actor %s is no longer limited", url));
else
snac_log(&snac, xs_fmt("error unlimiting actor %s (%d)", url, ret));
return 0;
}
if (strcmp(cmd, "search") == 0) { /** **/
xs *tl = timeline_simple_list(&snac, "private", 0, XS_ALL);
/* 'url' contains the regex */
xs *r = search_by_content(&snac, tl, url, 10);
int c = 0;
char *v;
/* print results as standalone links */
while (xs_list_next(r, &v, &c)) {
printf("%s/admin/p/%s\n", snac.actor, v);
}
return 0;
}
if (strcmp(cmd, "ping") == 0) { /** **/
xs *actor_o = NULL;
if (!xs_startswith(url, "https:/")) {
/* try to resolve via webfinger */
if (!valid_status(webfinger_request(url, &url, NULL))) {
srv_log(xs_fmt("cannot resolve %s via webfinger", url));
return 1;
}
}
if (valid_status(actor_request(&snac, url, &actor_o))) {
xs *msg = msg_ping(&snac, url);
enqueue_output_by_actor(&snac, msg, url, 0);
if (dbglevel) {
xs_json_dump(msg, 4, stdout);
}
srv_log(xs_fmt("Ping sent to %s -- see log for Pong reply", url));
}
else {
srv_log(xs_fmt("Error getting actor %s", url));
return 1;
}
return 0;
}
if (strcmp(cmd, "pin") == 0) { /** **/
int ret = pin(&snac, url);
if (ret < 0) {
fprintf(stderr, "error pinning %s %d\n", url, ret);
return 1;
}
return 0;
}
if (strcmp(cmd, "unpin") == 0) { /** **/
int ret = unpin(&snac, url);
if (ret < 0) {
fprintf(stderr, "error unpinning %s %d\n", url, ret);
return 1;
}
return 0;
}
if (strcmp(cmd, "question") == 0) { /** **/
int end_secs = 5 * 60;
xs *opts = xs_split(url, ";");
xs *msg = msg_question(&snac, "Poll", NULL, opts, 0, end_secs);
xs *c_msg = msg_create(&snac, msg);
if (dbglevel) {
xs_json_dump(c_msg, 4, stdout);
}
enqueue_message(&snac, c_msg);
enqueue_close_question(&snac, xs_dict_get(msg, "id"), end_secs);
timeline_add(&snac, xs_dict_get(msg, "id"), msg);
return 0;
}
if (strcmp(cmd, "request") == 0) { /** **/
int status;
xs *data = NULL;
status = activitypub_request(&snac, url, &data);
printf("status: %d\n", status);
if (data != NULL) {
xs_json_dump(data, 4, stdout);
}
return 0;
}
if (strcmp(cmd, "request2") == 0) { /** **/
enqueue_object_request(&snac, url, 2);
return 0;
}
if (strcmp(cmd, "actor") == 0) { /** **/
int status;
xs *data = NULL;
status = actor_request(&snac, url, &data);
printf("status: %d\n", status);
if (valid_status(status)) {
xs_json_dump(data, 4, stdout);
}
return 0;
}
if (strcmp(cmd, "note") == 0) { /** **/
xs *content = NULL;
xs *msg = NULL;
xs *c_msg = NULL;
xs *attl = xs_list_new();
char *fn = NULL;
/* iterate possible attachments */
while ((fn = GET_ARGV())) {
FILE *f;
if ((f = fopen(fn, "rb")) != NULL) {
/* get the file size and content */
fseek(f, 0, SEEK_END);
int sz = ftell(f);
fseek(f, 0, SEEK_SET);
xs *atc = xs_readall(f);
fclose(f);
char *ext = strrchr(fn, '.');
xs *hash = xs_md5_hex(fn, strlen(fn));
xs *id = xs_fmt("%s%s", hash, ext);
xs *url = xs_fmt("%s/s/%s", snac.actor, id);
/* store */
static_put(&snac, id, atc, sz);
xs *l = xs_list_new();
l = xs_list_append(l, url);
l = xs_list_append(l, ""); /* alt text */
attl = xs_list_append(attl, l);
}
else
fprintf(stderr, "Error opening '%s' as attachment\n", fn);
}
if (strcmp(url, "-e") == 0) {
/* get the content from an editor */
FILE *f;
unlink("/tmp/snac-edit.txt");
system("$EDITOR /tmp/snac-edit.txt");
if ((f = fopen("/tmp/snac-edit.txt", "r")) != NULL) {
content = xs_readall(f);
fclose(f);
unlink("/tmp/snac-edit.txt");
}
else {
printf("Nothing to send\n");
return 1;
}
}
else
if (strcmp(url, "-") == 0) {
/* get the content from stdin */
content = xs_readall(stdin);
}
else
content = xs_dup(url);
msg = msg_note(&snac, content, NULL, NULL, attl, 0);
c_msg = msg_create(&snac, msg);
if (dbglevel) {
xs_json_dump(c_msg, 4, stdout);
}
enqueue_message(&snac, c_msg);
timeline_add(&snac, xs_dict_get(msg, "id"), msg);
return 0;
}
fprintf(stderr, "ERROR: bad command '%s'\n", cmd);
return 1;
}
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