mirror of
https://codeberg.org/grunfink/snac2.git
synced 2024-11-22 21:35:04 +00:00
331 lines
8 KiB
C
331 lines
8 KiB
C
/* snac - A simple, minimalistic ActivityPub instance */
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/* copyright (c) 2022 grunfink - MIT license */
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#include "xs.h"
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#include "xs_io.h"
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#include "xs_encdec.h"
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#include "xs_json.h"
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#include "xs_socket.h"
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#include "xs_httpd.h"
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#include "xs_mime.h"
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#include "snac.h"
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#include <setjmp.h>
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#include <pthread.h>
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/* susie.png */
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const char *susie =
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"iVBORw0KGgoAAAANSUhEUgAAAEAAAABAAQAAAAC"
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"CEkxzAAAAUUlEQVQoz43R0QkAMQwCUDdw/y3dwE"
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"vsvzlL4X1IoQkAisKmwfAFT3RgJHbQezpSRoXEq"
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"eqCL9BJBf7h3QbOCCxV5EVWMEMwG7K1/WODtlvx"
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"AYTtEsDU9F34AAAAAElFTkSuQmCC";
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int server_get_handler(d_char *req, char *q_path,
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char **body, int *b_size, char **ctype)
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/* basic server services */
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{
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int status = 0;
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/* is it the server root? */
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if (*q_path == '\0') {
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/* try to open greeting.html */
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xs *fn = xs_fmt("%s/greeting.html", srv_basedir);
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FILE *f;
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if ((f = fopen(fn, "r")) != NULL) {
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d_char *s = xs_readall(f);
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fclose(f);
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status = 200;
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/* replace %host% */
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s = xs_replace_i(s, "%host%", xs_dict_get(srv_config, "host"));
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/* does it have a %userlist% mark? */
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if (xs_str_in(s, "%userlist%") != -1) {
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char *host = xs_dict_get(srv_config, "host");
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xs *list = user_list();
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char *p, *uid;
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xs *ul = xs_str_new("<ul class=\"snac-user-list\">\n");
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p = list;
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while (xs_list_iter(&p, &uid)) {
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snac snac;
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if (user_open(&snac, uid)) {
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xs *u = xs_fmt(
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"<li><a href=\"%s\">@%s@%s (%s)</a></li>\n",
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snac.actor, uid, host,
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xs_dict_get(snac.config, "name"));
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ul = xs_str_cat(ul, u);
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user_free(&snac);
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}
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}
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ul = xs_str_cat(ul, "</ul>\n");
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s = xs_replace_i(s, "%userlist%", ul);
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}
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*body = s;
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}
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}
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else
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if (strcmp(q_path, "/susie.png") == 0) {
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status = 200;
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*body = xs_base64_dec(susie, b_size);
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*ctype = "image/png";
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}
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if (status != 0)
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srv_debug(1, xs_fmt("server_get_handler serving '%s' %d", q_path, status));
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return status;
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}
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void httpd_connection(FILE *f)
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/* the connection processor */
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{
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xs *req;
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char *method;
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int status = 0;
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d_char *body = NULL;
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int b_size = 0;
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char *ctype = NULL;
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xs *headers = NULL;
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xs *q_path = NULL;
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xs *payload = NULL;
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int p_size = 0;
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char *p;
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req = xs_httpd_request(f, &payload, &p_size);
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if (req == NULL) {
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/* probably because a timeout */
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fclose(f);
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return;
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}
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method = xs_dict_get(req, "method");
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q_path = xs_dup(xs_dict_get(req, "path"));
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/* crop the q_path from leading / and the prefix */
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if (xs_endswith(q_path, "/"))
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q_path = xs_crop(q_path, 0, -1);
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p = xs_dict_get(srv_config, "prefix");
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if (xs_startswith(q_path, p))
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q_path = xs_crop(q_path, strlen(p), 0);
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if (strcmp(method, "GET") == 0 || strcmp(method, "HEAD") == 0) {
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/* cascade through */
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if (status == 0)
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status = server_get_handler(req, q_path, &body, &b_size, &ctype);
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if (status == 0)
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status = webfinger_get_handler(req, q_path, &body, &b_size, &ctype);
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if (status == 0)
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status = activitypub_get_handler(req, q_path, &body, &b_size, &ctype);
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if (status == 0)
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status = html_get_handler(req, q_path, &body, &b_size, &ctype);
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}
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else
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if (strcmp(method, "POST") == 0) {
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if (status == 0)
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status = activitypub_post_handler(req, q_path,
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payload, p_size, &body, &b_size, &ctype);
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if (status == 0)
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status = html_post_handler(req, q_path,
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payload, p_size, &body, &b_size, &ctype);
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}
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/* let's go */
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headers = xs_dict_new();
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/* unattended? it's an error */
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if (status == 0) {
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srv_debug(1, xs_fmt("httpd_connection unattended %s %s", method, q_path));
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status = 404;
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}
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if (status == 404)
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body = xs_str_new("<h1>404 Not Found</h1>");
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if (status == 400)
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body = xs_str_new("<h1>400 Bad Request</h1>");
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if (status == 303)
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headers = xs_dict_append(headers, "location", body);
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if (status == 401)
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headers = xs_dict_append(headers, "WWW-Authenticate", "Basic realm=\"IDENTIFY\"");
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if (ctype == NULL)
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ctype = "text/html; charset=utf-8";
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headers = xs_dict_append(headers, "content-type", ctype);
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headers = xs_dict_append(headers, "x-creator", USER_AGENT);
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if (b_size == 0 && body != NULL)
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b_size = strlen(body);
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/* if it was a HEAD, no body will be sent */
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if (strcmp(method, "HEAD") == 0)
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body = xs_free(body);
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xs_httpd_response(f, status, headers, body, b_size);
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fclose(f);
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srv_archive("RECV", req, payload, p_size, status, headers, body, b_size);
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xs_free(body);
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}
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static jmp_buf on_break;
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void term_handler(int s)
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{
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longjmp(on_break, 1);
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}
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static void *purge_thread(void *arg)
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/* spawned purge */
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{
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srv_log(xs_dup("purge start"));
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purge_all();
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srv_log(xs_dup("purge end"));
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return NULL;
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}
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static void *queue_thread(void *arg)
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/* queue thread (queue management) */
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{
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pthread_mutex_t dummy_mutex = PTHREAD_MUTEX_INITIALIZER;
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pthread_cond_t dummy_cond = PTHREAD_COND_INITIALIZER;
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time_t purge_time;
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/* first purge time */
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purge_time = time(NULL) + 15 * 60;
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srv_log(xs_fmt("queue thread start"));
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while (srv_running) {
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time_t t;
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{
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xs *list = user_list();
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char *p, *uid;
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/* process queues for all users */
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p = list;
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while (xs_list_iter(&p, &uid)) {
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snac snac;
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if (user_open(&snac, uid)) {
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process_queue(&snac);
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user_free(&snac);
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}
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}
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}
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/* time to purge? */
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if ((t = time(NULL)) > purge_time) {
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pthread_t pth;
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pthread_create(&pth, NULL, purge_thread, NULL);
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/* next purge time is tomorrow */
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purge_time = t + 24 * 60 * 60;
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}
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/* sleep 3 seconds */
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struct timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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ts.tv_sec += 3;
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pthread_mutex_lock(&dummy_mutex);
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while (pthread_cond_timedwait(&dummy_cond, &dummy_mutex, &ts) == 0);
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pthread_mutex_unlock(&dummy_mutex);
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}
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srv_log(xs_fmt("queue thread stop"));
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return NULL;
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}
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static void *connection_thread(void *arg)
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/* connection thread */
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{
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httpd_connection((FILE *)arg);
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return NULL;
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}
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int threaded_connections = 1;
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void httpd(void)
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/* starts the server */
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{
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char *address;
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int port;
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int rs;
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pthread_t htid;
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address = xs_dict_get(srv_config, "address");
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port = xs_number_get(xs_dict_get(srv_config, "port"));
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if ((rs = xs_socket_server(address, port)) == -1) {
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srv_log(xs_fmt("cannot bind socket to %s:%d", address, port));
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return;
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}
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srv_running = 1;
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signal(SIGPIPE, SIG_IGN);
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signal(SIGTERM, term_handler);
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signal(SIGINT, term_handler);
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srv_log(xs_fmt("httpd start %s:%d %s", address, port, USER_AGENT));
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pthread_create(&htid, NULL, queue_thread, NULL);
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if (setjmp(on_break) == 0) {
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for (;;) {
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FILE *f = xs_socket_accept(rs);
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if (threaded_connections) {
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pthread_t cth;
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pthread_create(&cth, NULL, connection_thread, f);
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pthread_detach(cth);
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}
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else
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httpd_connection(f);
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}
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}
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srv_running = 0;
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/* wait for the helper thread to end */
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pthread_join(htid, NULL);
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srv_log(xs_fmt("httpd stop %s:%d", address, port));
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}
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