2.59
httpd.c
1/* snac - A simple, minimalistic ActivityPub instance */
2/* copyright (c) 2022 - 2024 grunfink et al. / MIT license */
3
4#include "xs.h"
5#include "xs_io.h"
6#include "xs_json.h"
7#include "xs_socket.h"
8#include "xs_unix_socket.h"
9#include "xs_httpd.h"
10#include "xs_mime.h"
11#include "xs_time.h"
12#include "xs_openssl.h"
13#include "xs_fcgi.h"
14#include "xs_html.h"
15
16#include "snac.h"
17
18#include <setjmp.h>
19#include <pthread.h>
20#include <semaphore.h>
21#include <fcntl.h>
22#include <stdint.h>
23
24#include <sys/resource.h> // for getrlimit()
25
26#include <sys/mman.h>
27
28#ifdef USE_POLL_FOR_SLEEP
29#include <poll.h>
30#endif
31
32/** server state **/
33srv_state *p_state = NULL;
34
35
36/** job control **/
37
38/* mutex to access the lists of jobs */
39static pthread_mutex_t job_mutex;
40
41/* semaphore to trigger job processing */
42static sem_t *job_sem;
43
44typedef struct job_fifo_item {
45 struct job_fifo_item *next;
46 xs_val *job;
47} job_fifo_item;
48
49static job_fifo_item *job_fifo_first = NULL;
50static job_fifo_item *job_fifo_last = NULL;
51
52
53/** other global data **/
54
55static jmp_buf on_break;
56
57
58/** code **/
59
60/* nodeinfo 2.0 template */
61const char *nodeinfo_2_0_template = ""
62 "{\"version\":\"2.0\","
63 "\"software\":{\"name\":\"snac\",\"version\":\"" VERSION "\"},"
64 "\"protocols\":[\"activitypub\"],"
65 "\"services\":{\"outbound\":[],\"inbound\":[]},"
66 "\"usage\":{\"users\":{\"total\":%d,\"activeMonth\":%d,\"activeHalfyear\":%d},"
67 "\"localPosts\":%d},"
68 "\"openRegistrations\":false,\"metadata\":{}}";
69
70xs_str *nodeinfo_2_0(void)
71/* builds a nodeinfo json object */
72{
73 int n_utotal = 0;
74 int n_umonth = 0;
75 int n_uhyear = 0;
76 int n_posts = 0;
77 xs *users = user_list();
78 xs_list *p = users;
79 const char *v;
80 double now = (double)time(NULL);
81
82 while (xs_list_iter(&p, &v)) {
83 /* build the full path name to the last usage log */
84 xs *llfn = xs_fmt("%s/user/%s/lastlog.txt", srv_basedir, v);
85 double llsecs = now - mtime(llfn);
86
87 if (llsecs < 60 * 60 * 24 * 30 * 6) {
88 n_uhyear++;
89
90 if (llsecs < 60 * 60 * 24 * 30)
91 n_umonth++;
92 }
93
94 n_utotal++;
95
96 /* build the file to each user public.idx */
97 xs *pidxfn = xs_fmt("%s/user/%s/public.idx", srv_basedir, v);
98 n_posts += index_len(pidxfn);
99 }
100
101 return xs_fmt(nodeinfo_2_0_template, n_utotal, n_umonth, n_uhyear, n_posts);
102}
103
104
105static xs_str *greeting_html(void)
106/* processes and returns greeting.html */
107{
108 /* try to open greeting.html */
109 xs *fn = xs_fmt("%s/greeting.html", srv_basedir);
110 FILE *f;
111 xs_str *s = NULL;
112
113 if ((f = fopen(fn, "r")) != NULL) {
114 s = xs_readall(f);
115 fclose(f);
116
117 /* replace %host% */
118 s = xs_replace_i(s, "%host%", xs_dict_get(srv_config, "host"));
119
120 const char *adm_email = xs_dict_get(srv_config, "admin_email");
121 if (xs_is_null(adm_email) || *adm_email == '\0')
122 adm_email = "the administrator of this instance";
123
124 /* replace %admin_email */
125 s = xs_replace_i(s, "%admin_email%", adm_email);
126
127 /* does it have a %userlist% mark? */
128 if (xs_str_in(s, "%userlist%") != -1) {
129 const char *host = xs_dict_get(srv_config, "host");
130 xs *list = user_list();
131 xs_list *p = list;
132 const xs_str *uid;
133
134 xs_html *ul = xs_html_tag("ul",
135 xs_html_attr("class", "snac-user-list"));
136
137 p = list;
138 while (xs_list_iter(&p, &uid)) {
139 snac user;
140
141 if (user_open(&user, uid)) {
142 xs_html_add(ul,
143 xs_html_tag("li",
144 xs_html_tag("a",
145 xs_html_attr("href", user.actor),
146 xs_html_text("@"),
147 xs_html_text(uid),
148 xs_html_text("@"),
149 xs_html_text(host),
150 xs_html_text(" ("),
151 xs_html_text(xs_dict_get(user.config, "name")),
152 xs_html_text(")"))));
153
154 user_free(&user);
155 }
156 }
157
158 xs *s1 = xs_html_render(ul);
159 s = xs_replace_i(s, "%userlist%", s1);
160 }
161 }
162
163 return s;
164}
165
166
167int server_get_handler(xs_dict *req, const char *q_path,
168 char **body, int *b_size, char **ctype)
169/* basic server services */
170{
171 int status = 0;
172
173 /* is it the server root? */
174 if (*q_path == '\0') {
175 const xs_dict *q_vars = xs_dict_get(req, "q_vars");
176 const char *t = NULL;
177
178 if (xs_type(q_vars) == XSTYPE_DICT && (t = xs_dict_get(q_vars, "t"))) {
179 /** search by tag **/
180 int skip = 0;
181 int show = xs_number_get(xs_dict_get(srv_config, "max_timeline_entries"));
182 const char *v;
183
184 if ((v = xs_dict_get(q_vars, "skip")) != NULL)
185 skip = atoi(v);
186 if ((v = xs_dict_get(q_vars, "show")) != NULL)
187 show = atoi(v);
188
189 xs *tl = tag_search(t, skip, show + 1);
190 int more = 0;
191 if (xs_list_len(tl) >= show + 1) {
192 /* drop the last one */
193 tl = xs_list_del(tl, -1);
194 more = 1;
195 }
196
197 const char *accept = xs_dict_get(req, "accept");
198 if (!xs_is_null(accept) && strcmp(accept, "application/rss+xml") == 0) {
199 xs *link = xs_fmt("%s/?t=%s", srv_baseurl, t);
200
201 *body = timeline_to_rss(NULL, tl, link, link, link);
202 *ctype = "application/rss+xml; charset=utf-8";
203 }
204 else {
205 xs *page = xs_fmt("?t=%s", t);
206 xs *title = xs_fmt(L("Search results for tag #%s"), t);
207 *body = html_timeline(NULL, tl, 0, skip, show, more, title, page, 0);
208 }
209 }
210 else
211 if (xs_type(xs_dict_get(srv_config, "show_instance_timeline")) == XSTYPE_TRUE) {
212 /** instance timeline **/
213 xs *tl = timeline_instance_list(0, 30);
214 *body = html_timeline(NULL, tl, 0, 0, 0, 0,
215 L("Recent posts by users in this instance"), NULL, 0);
216 }
217 else
218 *body = greeting_html();
219
220 if (*body)
221 status = HTTP_STATUS_OK;
222 }
223 else
224 if (strcmp(q_path, "/susie.png") == 0 || strcmp(q_path, "/favicon.ico") == 0 ) {
225 status = HTTP_STATUS_OK;
226 *body = xs_base64_dec(default_avatar_base64(), b_size);
227 *ctype = "image/png";
228 }
229 else
230 if (strcmp(q_path, "/.well-known/nodeinfo") == 0) {
231 status = HTTP_STATUS_OK;
232 *ctype = "application/json; charset=utf-8";
233 *body = xs_fmt("{\"links\":["
234 "{\"rel\":\"http:/" "/nodeinfo.diaspora.software/ns/schema/2.0\","
235 "\"href\":\"%s/nodeinfo_2_0\"}]}",
236 srv_baseurl);
237 }
238 else
239 if (strcmp(q_path, "/.well-known/host-meta") == 0) {
240 status = HTTP_STATUS_OK;
241 *ctype = "application/xrd+xml";
242 *body = xs_fmt("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
243 "<XRD>"
244 "<Link rel=\"lrdd\" type=\"application/xrd+xml\" template=\"https://%s/.well-known/webfinger?resource={uri}\"/>"
245 "</XRD>", xs_dict_get(srv_config, "host"));
246 }
247 else
248 if (strcmp(q_path, "/nodeinfo_2_0") == 0) {
249 status = HTTP_STATUS_OK;
250 *ctype = "application/json; charset=utf-8";
251 *body = nodeinfo_2_0();
252 }
253 else
254 if (strcmp(q_path, "/robots.txt") == 0) {
255 status = HTTP_STATUS_OK;
256 *ctype = "text/plain";
257 *body = xs_str_new("User-agent: *\n"
258 "Disallow: /\n");
259 }
260
261 if (status != 0)
262 srv_debug(1, xs_fmt("server_get_handler serving '%s' %d", q_path, status));
263
264 return status;
265}
266
267
268void httpd_connection(FILE *f)
269/* the connection processor */
270{
271 xs *req;
272 const char *method;
273 int status = 0;
274 xs_str *body = NULL;
275 int b_size = 0;
276 char *ctype = NULL;
277 xs *headers = xs_dict_new();
278 xs *q_path = NULL;
279 xs *payload = NULL;
280 xs *etag = NULL;
281 int p_size = 0;
282 const char *p;
283 int fcgi_id;
284
285 if (p_state->use_fcgi)
286 req = xs_fcgi_request(f, &payload, &p_size, &fcgi_id);
287 else
288 req = xs_httpd_request(f, &payload, &p_size);
289
290 if (req == NULL) {
291 /* probably because a timeout */
292 fclose(f);
293 return;
294 }
295
296 if (!(method = xs_dict_get(req, "method")) || !(p = xs_dict_get(req, "path"))) {
297 /* missing needed headers; discard */
298 fclose(f);
299 return;
300 }
301
302 q_path = xs_dup(p);
303
304 /* crop the q_path from leading / and the prefix */
305 if (xs_endswith(q_path, "/"))
306 q_path = xs_crop_i(q_path, 0, -1);
307
308 p = xs_dict_get(srv_config, "prefix");
309 if (xs_startswith(q_path, p))
310 q_path = xs_crop_i(q_path, strlen(p), 0);
311
312 if (strcmp(method, "GET") == 0 || strcmp(method, "HEAD") == 0) {
313 /* cascade through */
314 if (status == 0)
315 status = server_get_handler(req, q_path, &body, &b_size, &ctype);
316
317 if (status == 0)
318 status = webfinger_get_handler(req, q_path, &body, &b_size, &ctype);
319
320 if (status == 0)
321 status = activitypub_get_handler(req, q_path, &body, &b_size, &ctype);
322
323#ifndef NO_MASTODON_API
324 if (status == 0)
325 status = oauth_get_handler(req, q_path, &body, &b_size, &ctype);
326
327 if (status == 0)
328 status = mastoapi_get_handler(req, q_path, &body, &b_size, &ctype);
329#endif /* NO_MASTODON_API */
330
331 if (status == 0)
332 status = html_get_handler(req, q_path, &body, &b_size, &ctype, &etag);
333 }
334 else
335 if (strcmp(method, "POST") == 0) {
336
337#ifndef NO_MASTODON_API
338 if (status == 0)
339 status = oauth_post_handler(req, q_path,
340 payload, p_size, &body, &b_size, &ctype);
341
342 if (status == 0)
343 status = mastoapi_post_handler(req, q_path,
344 payload, p_size, &body, &b_size, &ctype);
345#endif
346
347 if (status == 0)
348 status = activitypub_post_handler(req, q_path,
349 payload, p_size, &body, &b_size, &ctype);
350
351 if (status == 0)
352 status = html_post_handler(req, q_path,
353 payload, p_size, &body, &b_size, &ctype);
354 }
355 else
356 if (strcmp(method, "PUT") == 0) {
357
358#ifndef NO_MASTODON_API
359 if (status == 0)
360 status = mastoapi_put_handler(req, q_path,
361 payload, p_size, &body, &b_size, &ctype);
362#endif
363
364 }
365 else
366 if (strcmp(method, "PATCH") == 0) {
367
368#ifndef NO_MASTODON_API
369 if (status == 0)
370 status = mastoapi_patch_handler(req, q_path,
371 payload, p_size, &body, &b_size, &ctype);
372#endif
373
374 }
375 else
376 if (strcmp(method, "OPTIONS") == 0) {
377 const char *methods = "OPTIONS, GET, HEAD, POST, PUT, DELETE";
378 headers = xs_dict_append(headers, "allow", methods);
379 headers = xs_dict_append(headers, "access-control-allow-methods", methods);
380 status = HTTP_STATUS_OK;
381 }
382 else
383 if (strcmp(method, "DELETE") == 0) {
384#ifndef NO_MASTODON_API
385 if (status == 0)
386 status = mastoapi_delete_handler(req, q_path,
387 payload, p_size, &body, &b_size, &ctype);
388#endif
389 }
390
391 /* unattended? it's an error */
392 if (status == 0) {
393 srv_archive_error("unattended_method", "unattended method", req, payload);
394 srv_debug(1, xs_fmt("httpd_connection unattended %s %s", method, q_path));
395 status = HTTP_STATUS_NOT_FOUND;
396 }
397
398 if (status == HTTP_STATUS_FORBIDDEN)
399 body = xs_str_new("<h1>403 Forbidden</h1>");
400
401 if (status == HTTP_STATUS_NOT_FOUND)
402 body = xs_str_new("<h1>404 Not Found</h1>");
403
404 if (status == HTTP_STATUS_BAD_REQUEST && body != NULL)
405 body = xs_str_new("<h1>400 Bad Request</h1>");
406
407 if (status == HTTP_STATUS_SEE_OTHER)
408 headers = xs_dict_append(headers, "location", body);
409
410 if (status == HTTP_STATUS_UNAUTHORIZED && body) {
411 xs *www_auth = xs_fmt("Basic realm=\"@%s@%s snac login\"",
412 body, xs_dict_get(srv_config, "host"));
413
414 headers = xs_dict_append(headers, "WWW-Authenticate", www_auth);
415 headers = xs_dict_append(headers, "Cache-Control", "no-cache, must-revalidate, max-age=0");
416 }
417
418 if (ctype == NULL)
419 ctype = "text/html; charset=utf-8";
420
421 headers = xs_dict_append(headers, "content-type", ctype);
422 headers = xs_dict_append(headers, "x-creator", USER_AGENT);
423
424 if (!xs_is_null(etag))
425 headers = xs_dict_append(headers, "etag", etag);
426
427 /* if there are any additional headers, add them */
428 const xs_dict *more_headers = xs_dict_get(srv_config, "http_headers");
429 if (xs_type(more_headers) == XSTYPE_DICT) {
430 const char *k, *v;
431 int c = 0;
432 while (xs_dict_next(more_headers, &k, &v, &c))
433 headers = xs_dict_set(headers, k, v);
434 }
435
436 if (b_size == 0 && body != NULL)
437 b_size = strlen(body);
438
439 /* if it was a HEAD, no body will be sent */
440 if (strcmp(method, "HEAD") == 0)
441 body = xs_free(body);
442
443 headers = xs_dict_append(headers, "access-control-allow-origin", "*");
444 headers = xs_dict_append(headers, "access-control-allow-headers", "*");
445
446 if (p_state->use_fcgi)
447 xs_fcgi_response(f, status, headers, body, b_size, fcgi_id);
448 else
449 xs_httpd_response(f, status, http_status_text(status), headers, body, b_size);
450
451 fclose(f);
452
453 srv_archive("RECV", NULL, req, payload, p_size, status, headers, body, b_size);
454
455 /* JSON validation check */
456 if (!xs_is_null(body) && strcmp(ctype, "application/json") == 0) {
457 xs *j = xs_json_loads(body);
458
459 if (j == NULL) {
460 srv_log(xs_fmt("bad JSON"));
461 srv_archive_error("bad_json", "bad JSON", req, body);
462 }
463 }
464
465 xs_free(body);
466}
467
468
469void job_post(const xs_val *job, int urgent)
470/* posts a job for the threads to process it */
471{
472 if (job != NULL) {
473 /* lock the mutex */
474 pthread_mutex_lock(&job_mutex);
475
476 job_fifo_item *i = xs_realloc(NULL, sizeof(job_fifo_item));
477 *i = (job_fifo_item){ NULL, xs_dup(job) };
478
479 if (job_fifo_first == NULL)
480 job_fifo_first = job_fifo_last = i;
481 else
482 if (urgent) {
483 /* prepend */
484 i->next = job_fifo_first;
485 job_fifo_first = i;
486 }
487 else {
488 /* append */
489 job_fifo_last->next = i;
490 job_fifo_last = i;
491 }
492
493 p_state->job_fifo_size++;
494
495 if (p_state->job_fifo_size > p_state->peak_job_fifo_size)
496 p_state->peak_job_fifo_size = p_state->job_fifo_size;
497
498 /* unlock the mutex */
499 pthread_mutex_unlock(&job_mutex);
500
501 /* ask for someone to attend it */
502 sem_post(job_sem);
503 }
504}
505
506
507void job_wait(xs_val **job)
508/* waits for an available job */
509{
510 *job = NULL;
511
512 if (sem_wait(job_sem) == 0) {
513 /* lock the mutex */
514 pthread_mutex_lock(&job_mutex);
515
516 /* dequeue */
517 job_fifo_item *i = job_fifo_first;
518
519 if (i != NULL) {
520 job_fifo_first = i->next;
521
522 if (job_fifo_first == NULL)
523 job_fifo_last = NULL;
524
525 *job = i->job;
526 xs_free(i);
527
528 p_state->job_fifo_size--;
529 }
530
531 /* unlock the mutex */
532 pthread_mutex_unlock(&job_mutex);
533 }
534}
535
536
537static void *job_thread(void *arg)
538/* job thread */
539{
540 int pid = (int)(uintptr_t)arg;
541
542 srv_debug(1, xs_fmt("job thread %d started", pid));
543
544 for (;;) {
545 xs *job = NULL;
546
547 p_state->th_state[pid] = THST_WAIT;
548
549 job_wait(&job);
550
551 if (job == NULL) /* corrupted message? */
552 continue;
553
554 if (xs_type(job) == XSTYPE_FALSE) /* special message: exit */
555 break;
556 else
557 if (xs_type(job) == XSTYPE_DATA) {
558 /* it's a socket */
559 FILE *f = NULL;
560
561 p_state->th_state[pid] = THST_IN;
562
563 xs_data_get(&f, job);
564
565 if (f != NULL)
566 httpd_connection(f);
567 }
568 else {
569 /* it's a q_item */
570 p_state->th_state[pid] = THST_QUEUE;
571
572 process_queue_item(job);
573 }
574 }
575
576 p_state->th_state[pid] = THST_STOP;
577
578 srv_debug(1, xs_fmt("job thread %d stopped", pid));
579
580 return NULL;
581}
582
583/* background thread sleep control */
584static pthread_mutex_t sleep_mutex;
585static pthread_cond_t sleep_cond;
586
587static void *background_thread(void *arg)
588/* background thread (queue management and other things) */
589{
590 time_t purge_time;
591
592 (void)arg;
593
594 /* first purge time */
595 purge_time = time(NULL) + 10 * 60;
596
597 srv_log(xs_fmt("background thread started"));
598
599 while (p_state->srv_running) {
600 time_t t;
601 int cnt = 0;
602
603 p_state->th_state[0] = THST_QUEUE;
604
605 {
606 xs *list = user_list();
607 char *p;
608 const char *uid;
609
610 /* process queues for all users */
611 p = list;
612 while (xs_list_iter(&p, &uid)) {
613 snac snac;
614
615 if (user_open(&snac, uid)) {
616 cnt += process_user_queue(&snac);
617 user_free(&snac);
618 }
619 }
620 }
621
622 /* global queue */
623 cnt += process_queue();
624
625 /* time to purge? */
626 if ((t = time(NULL)) > purge_time) {
627 /* next purge time is tomorrow */
628 purge_time = t + 24 * 60 * 60;
629
630 xs *q_item = xs_dict_new();
631 q_item = xs_dict_append(q_item, "type", "purge");
632 job_post(q_item, 0);
633 }
634
635 if (cnt == 0) {
636 /* sleep 3 seconds */
637
638 p_state->th_state[0] = THST_WAIT;
639
640#ifdef USE_POLL_FOR_SLEEP
641 poll(NULL, 0, 3 * 1000);
642#else
643 struct timespec ts;
644
645 clock_gettime(CLOCK_REALTIME, &ts);
646 ts.tv_sec += 3;
647
648 pthread_mutex_lock(&sleep_mutex);
649 while (pthread_cond_timedwait(&sleep_cond, &sleep_mutex, &ts) == 0);
650 pthread_mutex_unlock(&sleep_mutex);
651#endif
652 }
653 }
654
655 p_state->th_state[0] = THST_STOP;
656
657 srv_log(xs_fmt("background thread stopped"));
658
659 return NULL;
660}
661
662
663void term_handler(int s)
664{
665 (void)s;
666
667 longjmp(on_break, 1);
668}
669
670
671srv_state *srv_state_op(xs_str **fname, int op)
672/* opens or deletes the shared memory object */
673{
674 int fd;
675 srv_state *ss = NULL;
676
677 if (*fname == NULL)
678 *fname = xs_fmt("/%s_snac_state", xs_dict_get(srv_config, "host"));
679
680 switch (op) {
681 case 0: /* open for writing */
682
683#ifdef WITHOUT_SHM
684
685 errno = ENOTSUP;
686
687#else
688
689 if ((fd = shm_open(*fname, O_CREAT | O_RDWR, 0666)) != -1) {
690 ftruncate(fd, sizeof(*ss));
691
692 if ((ss = mmap(0, sizeof(*ss), PROT_READ | PROT_WRITE,
693 MAP_SHARED, fd, 0)) == MAP_FAILED)
694 ss = NULL;
695
696 close(fd);
697 }
698
699#endif
700
701 if (ss == NULL) {
702 /* shared memory error: just create a plain structure */
703 srv_log(xs_fmt("warning: shm object error (%s)", strerror(errno)));
704 ss = malloc(sizeof(*ss));
705 }
706
707 /* init structure */
708 *ss = (srv_state){0};
709 ss->s_size = sizeof(*ss);
710
711 break;
712
713 case 1: /* open for reading */
714
715#ifdef WITHOUT_SHM
716
717 errno = ENOTSUP;
718
719#else
720
721 if ((fd = shm_open(*fname, O_RDONLY, 0666)) != -1) {
722 if ((ss = mmap(0, sizeof(*ss), PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED)
723 ss = NULL;
724
725 close(fd);
726 }
727
728#endif
729
730 if (ss == NULL) {
731 /* shared memory error */
732 srv_log(xs_fmt("error: shm object error (%s) server not running?", strerror(errno)));
733 }
734 else
735 if (ss->s_size != sizeof(*ss)) {
736 srv_log(xs_fmt("error: struct size mismatch (%d != %d)",
737 ss->s_size, sizeof(*ss)));
738
739 munmap(ss, sizeof(*ss));
740
741 ss = NULL;
742 }
743
744 break;
745
746 case 2: /* unlink */
747
748#ifndef WITHOUT_SHM
749
750 if (*fname)
751 shm_unlink(*fname);
752
753#endif
754
755 break;
756 }
757
758 return ss;
759}
760
761
762void httpd(void)
763/* starts the server */
764{
765 const char *address = NULL;
766 const char *port = NULL;
767 xs *full_address = NULL;
768 int rs;
769 pthread_t threads[MAX_THREADS] = {0};
770 int n;
771 xs *sem_name = NULL;
772 xs *shm_name = NULL;
773 sem_t anon_job_sem;
774
775 address = xs_dict_get(srv_config, "address");
776
777 if (*address == '/') {
778 rs = xs_unix_socket_server(address, NULL);
779 full_address = xs_fmt("unix:%s", address);
780 }
781 else {
782 port = xs_number_str(xs_dict_get(srv_config, "port"));
783 full_address = xs_fmt("%s:%s", address, port);
784
785 rs = xs_socket_server(address, port);
786 }
787
788 if (rs == -1) {
789 srv_log(xs_fmt("cannot bind socket to %s", full_address));
790 return;
791 }
792
793 /* setup the server stat structure */
794 p_state = srv_state_op(&shm_name, 0);
795
796 p_state->srv_start_time = time(NULL);
797
798 p_state->use_fcgi = xs_type(xs_dict_get(srv_config, "fastcgi")) == XSTYPE_TRUE;
799
800 p_state->srv_running = 1;
801
802 signal(SIGPIPE, SIG_IGN);
803 signal(SIGTERM, term_handler);
804 signal(SIGINT, term_handler);
805
806 srv_log(xs_fmt("httpd%s start %s %s", p_state->use_fcgi ? " (FastCGI)" : "",
807 full_address, USER_AGENT));
808
809 /* show the number of usable file descriptors */
810 struct rlimit r;
811 getrlimit(RLIMIT_NOFILE, &r);
812 srv_debug(1, xs_fmt("available (rlimit) fds: %d (cur) / %d (max)",
813 (int) r.rlim_cur, (int) r.rlim_max));
814
815 /* initialize the job control engine */
816 pthread_mutex_init(&job_mutex, NULL);
817 sem_name = xs_fmt("/job_%d", getpid());
818 job_sem = sem_open(sem_name, O_CREAT, 0644, 0);
819
820 if (job_sem == NULL) {
821 /* error opening a named semaphore; try with an anonymous one */
822 if (sem_init(&anon_job_sem, 0, 0) != -1)
823 job_sem = &anon_job_sem;
824 }
825
826 if (job_sem == NULL) {
827 srv_log(xs_fmt("fatal error: cannot create semaphore -- cannot continue"));
828 return;
829 }
830
831 /* initialize sleep control */
832 pthread_mutex_init(&sleep_mutex, NULL);
833 pthread_cond_init(&sleep_cond, NULL);
834
835 p_state->n_threads = xs_number_get(xs_dict_get(srv_config, "num_threads"));
836
837#ifdef _SC_NPROCESSORS_ONLN
838 if (p_state->n_threads == 0) {
839 /* get number of CPUs on the machine */
840 p_state->n_threads = sysconf(_SC_NPROCESSORS_ONLN);
841 }
842#endif
843
844 if (p_state->n_threads < 4)
845 p_state->n_threads = 4;
846
847 if (p_state->n_threads > MAX_THREADS)
848 p_state->n_threads = MAX_THREADS;
849
850 srv_debug(0, xs_fmt("using %d threads", p_state->n_threads));
851
852 /* thread #0 is the background thread */
853 pthread_create(&threads[0], NULL, background_thread, NULL);
854
855 /* the rest of threads are for job processing */
856 char *ptr = (char *) 0x1;
857 for (n = 1; n < p_state->n_threads; n++)
858 pthread_create(&threads[n], NULL, job_thread, ptr++);
859
860 if (setjmp(on_break) == 0) {
861 for (;;) {
862 int cs = xs_socket_accept(rs);
863
864 if (cs != -1) {
865 FILE *f = fdopen(cs, "r+");
866 xs *job = xs_data_new(&f, sizeof(FILE *));
867 job_post(job, 1);
868 }
869 else
870 break;
871 }
872 }
873
874 p_state->srv_running = 0;
875
876 /* send as many exit jobs as working threads */
877 for (n = 1; n < p_state->n_threads; n++)
878 job_post(xs_stock(XSTYPE_FALSE), 0);
879
880 /* wait for all the threads to exit */
881 for (n = 0; n < p_state->n_threads; n++)
882 pthread_join(threads[n], NULL);
883
884 sem_close(job_sem);
885 sem_unlink(sem_name);
886
887 srv_state_op(&shm_name, 2);
888
889 xs *uptime = xs_str_time_diff(time(NULL) - p_state->srv_start_time);
890
891 srv_log(xs_fmt("httpd%s stop %s (run time: %s)",
892 p_state->use_fcgi ? " (FastCGI)" : "",
893 full_address, uptime));
894}
