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nginx 0.1.19
[nginx-catap.git] / src / http / ngx_http_request.c
bloba6046f1bf1aae6aaa4b026b692c44a2106158307
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_event.h>
10 #include <ngx_http.h>
11
12
13 static void ngx_http_init_request(ngx_event_t *ev);
14 #if (NGX_HTTP_SSL)
15 static void ngx_http_ssl_handshake(ngx_event_t *rev);
16 #endif
17 static void ngx_http_process_request_line(ngx_event_t *rev);
18 static void ngx_http_process_request_headers(ngx_event_t *rev);
19 static ssize_t ngx_http_read_request_header(ngx_http_request_t *r);
20 static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r,
21 ngx_uint_t request_line);
22 static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r);
23 static ngx_int_t ngx_http_find_virtual_server(ngx_http_request_t *r);
24
25 static void ngx_http_set_write_handler(ngx_http_request_t *r);
26
27 static void ngx_http_block_read(ngx_event_t *ev);
28 static void ngx_http_read_discarded_body_event(ngx_event_t *rev);
29 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r);
30
31 static void ngx_http_set_keepalive(ngx_http_request_t *r);
32 static void ngx_http_keepalive_handler(ngx_event_t *ev);
33 static void ngx_http_set_lingering_close(ngx_http_request_t *r);
34 static void ngx_http_lingering_close_handler(ngx_event_t *ev);
35
36 static void ngx_http_client_error(ngx_http_request_t *r,
37 int client_error, int error);
38 static u_char *ngx_http_log_error(ngx_log_t *log, u_char *buf, size_t len);
39
40
41 /* NGX_HTTP_PARSE_... errors */
42
43 static char *client_header_errors[] = {
44 "client %V sent invalid method \"%V\"",
45 "client %V sent invalid request \"%V\"",
46 "client %V sent too long URI in request \"%V\"",
47 "client %V sent invalid method in HTTP/0.9 request \"%V\"",
48
49 "client %V sent invalid header, URL: \"%V\"",
50 "client %V sent too long header line, URL: \"%V\"",
51 "client %V sent HTTP/1.1 request without \"Host\" header, URL: \"%V\"",
52 "client %V sent invalid \"Content-Length\" header, URL: \"%V\"",
53 "client %V sent POST method without \"Content-Length\" header, URL: \"%V\"",
54 };
55
56
57 ngx_http_header_t ngx_http_headers_in[] = {
58 { ngx_string("Host"), offsetof(ngx_http_headers_in_t, host) },
59 { ngx_string("Connection"), offsetof(ngx_http_headers_in_t, connection) },
60 { ngx_string("If-Modified-Since"),
61 offsetof(ngx_http_headers_in_t, if_modified_since) },
62 { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) },
63 { ngx_string("Referer"), offsetof(ngx_http_headers_in_t, referer) },
64 { ngx_string("Content-Length"),
65 offsetof(ngx_http_headers_in_t, content_length) },
66 { ngx_string("Content-Type"),
67 offsetof(ngx_http_headers_in_t, content_type) },
68
69 { ngx_string("Range"), offsetof(ngx_http_headers_in_t, range) },
70 #if 0
71 { ngx_string("If-Range"), offsetof(ngx_http_headers_in_t, if_range) },
72 #endif
73
74 #if (NGX_HTTP_GZIP)
75 { ngx_string("Accept-Encoding"),
76 offsetof(ngx_http_headers_in_t, accept_encoding) },
77 { ngx_string("Via"), offsetof(ngx_http_headers_in_t, via) },
78 #endif
79
80 { ngx_string("Authorization"),
81 offsetof(ngx_http_headers_in_t, authorization) },
82
83 { ngx_string("Keep-Alive"), offsetof(ngx_http_headers_in_t, keep_alive) },
84
85 #if (NGX_HTTP_PROXY)
86 { ngx_string("X-Forwarded-For"),
87 offsetof(ngx_http_headers_in_t, x_forwarded_for) },
88 { ngx_string("X-Real-IP"), offsetof(ngx_http_headers_in_t, x_real_ip) },
89 { ngx_string("X-URL"), offsetof(ngx_http_headers_in_t, x_url) },
90 #endif
91
92 #if (NGX_HTTP_HEADERS)
93 { ngx_string("Accept"), offsetof(ngx_http_headers_in_t, accept) },
94 { ngx_string("Accept-Language"),
95 offsetof(ngx_http_headers_in_t, accept_language) },
96 { ngx_string("Via"), offsetof(ngx_http_headers_in_t, via) },
97 #endif
98
99 { ngx_null_string, 0 }
100 };
101
102
103 #if 0
104 static void ngx_http_dummy(ngx_event_t *wev)
105 {
106 return;
107 }
108 #endif
109
110
111 void ngx_http_init_connection(ngx_connection_t *c)
112 {
113 ngx_event_t *rev;
114 ngx_http_log_ctx_t *ctx;
115
116 if (!(ctx = ngx_palloc(c->pool, sizeof(ngx_http_log_ctx_t)))) {
117 ngx_http_close_connection(c);
118 return;
119 }
120
121 ctx->client = &c->addr_text;
122 ctx->request = NULL;
123
124 c->log->connection = c->number;
125 c->log->handler = ngx_http_log_error;
126 c->log->data = ctx;
127 c->log->action = "reading client request line";
128
129 c->log_error = NGX_ERROR_INFO;
130
131 rev = c->read;
132 rev->event_handler = ngx_http_init_request;
133
134 /* STUB: epoll edge */ c->write->event_handler = ngx_http_empty_handler;
135
136 if (rev->ready) {
137 /* the deferred accept(), rtsig, aio, iocp */
138
139 if (ngx_accept_mutex) {
140 if (ngx_mutex_lock(ngx_posted_events_mutex) == NGX_ERROR) {
141 ngx_http_close_connection(c);
142 return;
143 }
144
145 ngx_post_event(rev);
146
147 ngx_mutex_unlock(ngx_posted_events_mutex);
148 return;
149 }
150
151 #if (NGX_STAT_STUB)
152 (*ngx_stat_reading)++;
153 #endif
154
155 ngx_http_init_request(rev);
156 return;
157 }
158
159 ngx_add_timer(rev, c->listening->post_accept_timeout);
160
161 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
162 ngx_http_close_connection(c);
163 return;
164 }
165
166 #if 0
167 /* TODO: learn SO_SNDBUF (to use in zerocopy) via kqueue's EV_CLEAR event */
168
169 c->write->ready = 0;
170 c->write->event_handler = ngx_http_dummy;
171
172 if (ngx_handle_write_event(c->write, 0) == NGX_ERROR) {
173 ngx_http_close_connection(c);
174 return;
175 }
176 #endif
177
178 #if (NGX_STAT_STUB)
179 (*ngx_stat_reading)++;
180 #endif
181
182 }
183
184
185 static void ngx_http_init_request(ngx_event_t *rev)
186 {
187 ngx_uint_t i;
188 socklen_t len;
189 struct sockaddr_in sin;
190 ngx_connection_t *c;
191 ngx_http_request_t *r;
192 ngx_http_in_port_t *in_port;
193 ngx_http_in_addr_t *in_addr;
194 ngx_http_connection_t *hc;
195 ngx_http_server_name_t *server_name;
196 ngx_http_core_srv_conf_t *cscf;
197 ngx_http_core_loc_conf_t *clcf;
198 #if (NGX_HTTP_SSL)
199 ngx_http_ssl_srv_conf_t *sscf;
200 #endif
201
202 c = rev->data;
203
204 if (rev->timedout) {
205 ngx_log_error(NGX_LOG_INFO, c->log, NGX_ETIMEDOUT, "client timed out");
206
207 #if (NGX_STAT_STUB)
208 (*ngx_stat_reading)--;
209 #endif
210
211 ngx_http_close_connection(c);
212 return;
213 }
214
215 hc = c->data;
216
217 if (hc) {
218
219 #if (NGX_STAT_STUB)
220 (*ngx_stat_reading)++;
221 #endif
222
223 } else {
224 if (!(hc = ngx_pcalloc(c->pool, sizeof(ngx_http_connection_t)))) {
225
226 #if (NGX_STAT_STUB)
227 (*ngx_stat_reading)--;
228 #endif
229
230 ngx_http_close_connection(c);
231 return;
232 }
233 }
234
235 r = hc->request;
236
237 if (r) {
238 ngx_memzero(r, sizeof(ngx_http_request_t));
239
240 r->pipeline = hc->pipeline;
241
242 if (hc->nbusy) {
243 r->header_in = hc->busy[0];
244 }
245
246 } else {
247 if (!(r = ngx_pcalloc(c->pool, sizeof(ngx_http_request_t)))) {
248
249 #if (NGX_STAT_STUB)
250 (*ngx_stat_reading)--;
251 #endif
252
253 ngx_http_close_connection(c);
254 return;
255 }
256
257 hc->request = r;
258 }
259
260 #if (NGX_STAT_STUB)
261 (*ngx_stat_reading)--;
262 #endif
263
264 c->data = r;
265 r->http_connection = hc;
266
267 c->sent = 0;
268 r->signature = NGX_HTTP_MODULE;
269
270 /* find the server configuration for the address:port */
271
272 /* AF_INET only */
273
274 in_port = c->servers;
275 in_addr = in_port->addrs.elts;
276
277 r->port = in_port->port;
278 r->port_text = &in_port->port_text;
279
280 i = 0;
281
282 if (in_port->addrs.nelts > 1) {
283
284 /*
285 * There are several addresses on this port and one of them
286 * is the "*:port" wildcard so getsockname() is needed to determine
287 * the server address.
288 *
289 * AcceptEx() already gave this address.
290 */
291
292 #if (NGX_WIN32)
293 if (c->local_sockaddr) {
294 r->in_addr =
295 ((struct sockaddr_in *) c->local_sockaddr)->sin_addr.s_addr;
296
297 } else
298 #endif
299 {
300 len = sizeof(struct sockaddr_in);
301 if (getsockname(c->fd, (struct sockaddr *) &sin, &len) == -1) {
302 ngx_connection_error(c, ngx_socket_errno,
303 "getsockname() failed");
304 ngx_http_close_connection(c);
305 return;
306 }
307
308 r->in_addr = sin.sin_addr.s_addr;
309 }
310
311 /* the last in_port->addrs address is "*" */
312
313 for ( /* void */ ; i < in_port->addrs.nelts - 1; i++) {
314 if (in_addr[i].addr == r->in_addr) {
315 break;
316 }
317 }
318
319 } else {
320 r->in_addr = in_addr[0].addr;
321 }
322
323 r->virtual_names = &in_addr[i];
324
325 /* the default server configuration for the address:port */
326 cscf = in_addr[i].core_srv_conf;
327
328 r->main_conf = cscf->ctx->main_conf;
329 r->srv_conf = cscf->ctx->srv_conf;
330 r->loc_conf = cscf->ctx->loc_conf;
331
332 rev->event_handler = ngx_http_process_request_line;
333
334 #if (NGX_HTTP_SSL)
335
336 sscf = ngx_http_get_module_srv_conf(r, ngx_http_ssl_module);
337 if (sscf->enable) {
338
339 if (c->ssl == NULL) {
340 if (ngx_ssl_create_session(sscf->ssl_ctx, c, NGX_SSL_BUFFER)
341 == NGX_ERROR)
342 {
343 ngx_http_close_connection(c);
344 return;
345 }
346
347 rev->event_handler = ngx_http_ssl_handshake;
348
349 /*
350 * The majority of browsers do not send the "close notify" alert.
351 * Among them are MSIE, Mozilla, Netscape 4, Konqueror, and Links.
352 * And what is more MSIE ignores the server's alert.
353 *
354 * Opera always sends the alert.
355 */
356
357 c->ssl->no_rcv_shut = 1;
358 }
359
360 r->filter_need_in_memory = 1;
361 }
362
363 #endif
364
365 server_name = cscf->server_names.elts;
366 r->server_name = server_name->name;
367
368 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
369 c->log->file = clcf->err_log->file;
370 if (!(c->log->log_level & NGX_LOG_DEBUG_CONNECTION)) {
371 c->log->log_level = clcf->err_log->log_level;
372 }
373
374 if (c->buffer == NULL) {
375 c->buffer = ngx_create_temp_buf(c->pool,
376 cscf->client_header_buffer_size);
377 if (c->buffer == NULL) {
378 ngx_http_close_connection(c);
379 return;
380 }
381 }
382
383 if (r->header_in == NULL) {
384 r->header_in = c->buffer;
385 }
386
387 if (!(r->pool = ngx_create_pool(cscf->request_pool_size, c->log))) {
388 ngx_http_close_connection(c);
389 return;
390 }
391
392 if (ngx_array_init(&r->cleanup, r->pool, 5, sizeof(ngx_http_cleanup_t))
393 == NGX_ERROR)
394 {
395 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
396 ngx_http_close_connection(c);
397 return;
398 }
399
400
401 if (ngx_list_init(&r->headers_out.headers, r->pool, 20,
402 sizeof(ngx_table_elt_t)) == NGX_ERROR)
403 {
404 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
405 ngx_http_close_connection(c);
406 return;
407 }
408
409
410 r->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
411 if (r->ctx == NULL) {
412 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
413 ngx_http_close_connection(c);
414 return;
415 }
416
417 c->single_connection = 1;
418 r->connection = c;
419
420 r->file.fd = NGX_INVALID_FILE;
421
422 r->headers_in.content_length_n = -1;
423 r->headers_in.keep_alive_n = -1;
424 r->headers_out.content_length_n = -1;
425 r->headers_out.last_modified_time = -1;
426
427 r->http_state = NGX_HTTP_READING_REQUEST_STATE;
428
429 #if (NGX_STAT_STUB)
430 (*ngx_stat_reading)++;
431 r->stat_reading = 1;
432 (*ngx_stat_requests)++;
433 #endif
434
435 rev->event_handler(rev);
436 }
437
438
439 #if (NGX_HTTP_SSL)
440
441 static void ngx_http_ssl_handshake(ngx_event_t *rev)
442 {
443 u_char buf[1];
444 ssize_t n;
445 ngx_int_t rc;
446 ngx_connection_t *c;
447 ngx_http_request_t *r;
448
449 c = rev->data;
450 r = c->data;
451
452 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
453 "http check ssl handshake");
454
455 if (rev->timedout) {
456 ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT);
457 return;
458 }
459
460 n = recv(c->fd, buf, 1, MSG_PEEK);
461
462 if (n == -1 && ngx_socket_errno == NGX_EAGAIN) {
463 return;
464 }
465
466 if (n == 1) {
467 if (buf[0] == 0x80 /* SSLv2 */ || buf[0] == 0x16 /* SSLv3/TLSv1 */) {
468 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0,
469 "https ssl handshake: 0x%02Xd", buf[0]);
470
471 c->recv = ngx_ssl_recv;
472 c->send_chain = ngx_ssl_send_chain;
473
474 rc = ngx_ssl_handshake(c);
475
476 if (rc == NGX_ERROR) {
477 ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST);
478 ngx_http_close_connection(r->connection);
479 return;
480 }
481
482 if (rc != NGX_OK) {
483 return;
484 }
485
486 } else {
487 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
488 "plain http");
489
490 r->plain_http = 1;
491 }
492 }
493
494 rev->event_handler = ngx_http_process_request_line;
495 ngx_http_process_request_line(rev);
496 }
497
498 #endif
499
500
501 static void ngx_http_process_request_line(ngx_event_t *rev)
502 {
503 ssize_t n;
504 ngx_int_t rc, rv;
505 ngx_connection_t *c;
506 ngx_http_request_t *r;
507 ngx_http_log_ctx_t *ctx;
508
509 c = rev->data;
510 r = c->data;
511
512 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
513 "http process request line");
514
515 if (rev->timedout) {
516 ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT);
517 return;
518 }
519
520 rc = NGX_AGAIN;
521
522 for ( ;; ) {
523
524 if (rc == NGX_AGAIN) {
525 n = ngx_http_read_request_header(r);
526
527 if (n == NGX_AGAIN || n == NGX_ERROR) {
528 return;
529 }
530 }
531
532 rc = ngx_http_parse_request_line(r, r->header_in);
533
534 if (rc == NGX_OK) {
535
536 /* the request line has been parsed successfully */
537
538 r->request_line.len = r->request_end - r->request_start;
539 r->request_line.data = r->request_start;
540
541
542 if (r->args_start) {
543 r->uri.len = r->args_start - 1 - r->uri_start;
544 } else {
545 r->uri.len = r->uri_end - r->uri_start;
546 }
547
548
549 if (r->complex_uri || r->quoted_uri) {
550
551 if (!(r->uri.data = ngx_palloc(r->pool, r->uri.len + 1))) {
552 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
553 ngx_http_close_connection(c);
554 return;
555 }
556
557 rc = ngx_http_parse_complex_uri(r);
558
559 if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
560 ngx_http_close_request(r, rc);
561 ngx_http_close_connection(c);
562 return;
563 }
564
565 if (rc != NGX_OK) {
566 ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST);
567 return;
568 }
569
570 } else {
571 r->uri.data = r->uri_start;
572 }
573
574
575 r->unparsed_uri.len = r->uri_end - r->uri_start;
576 r->unparsed_uri.data = r->uri_start;
577
578
579 if (r->method == 0) {
580 r->method_name.len = r->method_end - r->request_start + 1;
581 r->method_name.data = r->request_line.data;
582 }
583
584
585 if (r->http_protocol.data) {
586 r->http_protocol.len = r->request_end - r->http_protocol.data;
587 }
588
589
590 if (r->uri_ext) {
591 if (r->args_start) {
592 r->exten.len = r->args_start - 1 - r->uri_ext;
593 } else {
594 r->exten.len = r->uri_end - r->uri_ext;
595 }
596
597 r->exten.data = r->uri_ext;
598 }
599
600
601 if (r->args_start && r->uri_end > r->args_start) {
602 r->args.len = r->uri_end - r->args_start;
603 r->args.data = r->args_start;
604 }
605
606
607 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
608 "http request line: \"%V\"", &r->request_line);
609
610 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
611 "http uri: \"%V\"", &r->uri);
612
613 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
614 "http args: \"%V\"", &r->args);
615
616 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
617 "http exten: \"%V\"", &r->exten);
618
619 ctx = c->log->data;
620 ctx->request = r;
621
622 if (r->http_version < NGX_HTTP_VERSION_10) {
623 rev->event_handler = ngx_http_block_read;
624 ngx_http_handler(r);
625 return;
626 }
627
628
629 if (ngx_list_init(&r->headers_in.headers, r->pool, 20,
630 sizeof(ngx_table_elt_t)) == NGX_ERROR)
631 {
632 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
633 ngx_http_close_connection(c);
634 return;
635 }
636
637
638 if (ngx_array_init(&r->headers_in.cookies, r->pool, 5,
639 sizeof(ngx_table_elt_t *)) == NGX_ERROR)
640 {
641 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
642 ngx_http_close_connection(c);
643 return;
644 }
645
646 c->log->action = "reading client request headers";
647
648 rev->event_handler = ngx_http_process_request_headers;
649 ngx_http_process_request_headers(rev);
650
651 return;
652
653 } else if (rc != NGX_AGAIN) {
654
655 /* there was error while a request line parsing */
656
657 ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST);
658
659 #if 0
660 for (p = r->request_start; p < r->header_in->last; p++) {
661 if (*p == CR || *p == LF) {
662 break;
663 }
664 }
665
666 r->request_line.len = p - r->request_start;
667 r->request_line.data = r->request_start;
668
669 if (rc == NGX_HTTP_PARSE_INVALID_METHOD) {
670 r->http_version = NGX_HTTP_VERSION_10;
671 }
672
673 ngx_http_client_error(r, rc,
674 (rc == NGX_HTTP_PARSE_INVALID_METHOD) ?
675 NGX_HTTP_NOT_IMPLEMENTED:
676 NGX_HTTP_BAD_REQUEST);
677 #endif
678
679 return;
680 }
681
682 /* NGX_AGAIN: a request line parsing is still incomplete */
683
684 if (r->header_in->pos == r->header_in->end) {
685
686 rv = ngx_http_alloc_large_header_buffer(r, 1);
687
688 if (rv == NGX_ERROR) {
689 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
690 ngx_http_close_connection(c);
691 return;
692 }
693
694 if (rv == NGX_DECLINED) {
695 ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_URI,
696 NGX_HTTP_REQUEST_URI_TOO_LARGE);
697 return;
698 }
699 }
700 }
701 }
702
703
704 static void ngx_http_process_request_headers(ngx_event_t *rev)
705 {
706 ssize_t n;
707 ngx_int_t rc, rv, i;
708 ngx_table_elt_t *h, **cookie;
709 ngx_connection_t *c;
710 ngx_http_request_t *r;
711
712 c = rev->data;
713 r = c->data;
714
715 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0,
716 "http process request header line");
717
718 if (rev->timedout) {
719 ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT);
720 return;
721 }
722
723 rc = NGX_AGAIN;
724
725 for ( ;; ) {
726
727 if (rc == NGX_AGAIN) {
728
729 if (r->header_in->pos == r->header_in->end) {
730
731 rv = ngx_http_alloc_large_header_buffer(r, 0);
732
733 if (rv == NGX_ERROR) {
734 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
735 ngx_http_close_connection(c);
736 return;
737 }
738
739 if (rv == NGX_DECLINED) {
740 ngx_http_client_error(r, NGX_HTTP_PARSE_TOO_LONG_HEADER,
741 NGX_HTTP_BAD_REQUEST);
742 return;
743 }
744 }
745
746 n = ngx_http_read_request_header(r);
747
748 if (n == NGX_AGAIN || n == NGX_ERROR) {
749 return;
750 }
751 }
752
753 rc = ngx_http_parse_header_line(r, r->header_in);
754
755 if (rc == NGX_OK) {
756
757 /* a header line has been parsed successfully */
758
759 r->headers_n++;
760
761 if (!(h = ngx_list_push(&r->headers_in.headers))) {
762 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
763 ngx_http_close_connection(c);
764 return;
765 }
766
767 h->key.len = r->header_name_end - r->header_name_start;
768 h->key.data = r->header_name_start;
769 h->key.data[h->key.len] = '\0';
770
771 h->value.len = r->header_end - r->header_start;
772 h->value.data = r->header_start;
773 h->value.data[h->value.len] = '\0';
774
775 if (h->key.len == sizeof("Cookie") - 1
776 && ngx_strcasecmp(h->key.data, "Cookie") == 0)
777 {
778 if (!(cookie = ngx_array_push(&r->headers_in.cookies))) {
779 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
780 ngx_http_close_connection(c);
781 return;
782 }
783
784 *cookie = h;
785
786 } else {
787
788 for (i = 0; ngx_http_headers_in[i].name.len != 0; i++) {
789 if (ngx_http_headers_in[i].name.len != h->key.len) {
790 continue;
791 }
792
793 if (ngx_strcasecmp(ngx_http_headers_in[i].name.data,
794 h->key.data) == 0)
795 {
796 *((ngx_table_elt_t **) ((char *) &r->headers_in
797 + ngx_http_headers_in[i].offset)) = h;
798 break;
799 }
800 }
801 }
802
803 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
804 "http header: \"%V: %V\"",
805 &h->key, &h->value);
806
807 continue;
808
809 } else if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
810
811 /* a whole header has been parsed successfully */
812
813 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
814 "http header done");
815
816 r->request_length += r->header_in->pos - r->header_in->start;
817
818 r->http_state = NGX_HTTP_PROCESS_REQUEST_STATE;
819
820 rc = ngx_http_process_request_header(r);
821
822 if (rc != NGX_OK) {
823 ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST);
824 return;
825 }
826
827 if (rev->timer_set) {
828 ngx_del_timer(rev);
829 }
830
831 #if (NGX_STAT_STUB)
832 (*ngx_stat_reading)--;
833 r->stat_reading = 0;
834 (*ngx_stat_writing)++;
835 r->stat_writing = 1;
836 #endif
837
838 rev->event_handler = ngx_http_block_read;
839 ngx_http_handler(r);
840 return;
841
842 } else if (rc != NGX_AGAIN) {
843
844 /* there was error while a header line parsing */
845
846 #if (NGX_DEBUG)
847 if (rc == NGX_HTTP_PARSE_INVALID_HEADER
848 && (rev->log->log_level & NGX_LOG_DEBUG_HTTP))
849 {
850 u_char *p;
851 for (p = r->header_name_start;
852 p < r->header_in->last - 1;
853 p++)
854 {
855 if (*p == LF) {
856 break;
857 }
858 }
859 *p = '\0';
860 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, rev->log, 0,
861 "http invalid header: \"%s\"",
862 r->header_name_start);
863 }
864 #endif
865
866 ngx_http_client_error(r, rc, NGX_HTTP_BAD_REQUEST);
867 return;
868 }
869
870 /* NGX_AGAIN: a header line parsing is still not complete */
871
872 }
873 }
874
875
876 static ssize_t ngx_http_read_request_header(ngx_http_request_t *r)
877 {
878 ssize_t n;
879 ngx_event_t *rev;
880 ngx_http_core_srv_conf_t *cscf;
881
882 rev = r->connection->read;
883
884 n = r->header_in->last - r->header_in->pos;
885
886 if (n > 0) {
887 return n;
888 }
889
890 if (!rev->ready) {
891 return NGX_AGAIN;
892 }
893
894 n = r->connection->recv(r->connection, r->header_in->last,
895 r->header_in->end - r->header_in->last);
896
897 if (n == NGX_AGAIN) {
898 if (!r->header_timeout_set) {
899 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
900 ngx_add_timer(rev, cscf->client_header_timeout);
901 r->header_timeout_set = 1;
902 }
903
904 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
905 ngx_http_close_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
906 ngx_http_close_connection(r->connection);
907 return NGX_ERROR;
908 }
909
910 return NGX_AGAIN;
911 }
912
913 if (n == 0) {
914 ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
915 "client closed prematurely connection");
916 }
917
918 if (n == 0 || n == NGX_ERROR) {
919 ngx_http_close_request(r, NGX_HTTP_BAD_REQUEST);
920 ngx_http_close_connection(r->connection);
921 return NGX_ERROR;
922 }
923
924 r->header_in->last += n;
925
926 return n;
927 }
928
929
930 static ngx_int_t ngx_http_alloc_large_header_buffer(ngx_http_request_t *r,
931 ngx_uint_t request_line)
932 {
933 u_char *old, *new;
934 ngx_buf_t *b;
935 ngx_http_connection_t *hc;
936 ngx_http_core_srv_conf_t *cscf;
937
938 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
939 "http alloc large header buffer");
940
941 if (request_line && r->state == 0) {
942
943 /* the client fills up the buffer with "\r\n" */
944
945 r->request_length += r->header_in->end - r->header_in->start;
946
947 r->header_in->pos = r->header_in->start;
948 r->header_in->last = r->header_in->start;
949
950 return NGX_OK;
951 }
952
953 old = request_line ? r->request_start : r->header_name_start;
954
955 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
956
957 if (r->state != 0
958 && (size_t) (r->header_in->pos - old)
959 >= cscf->large_client_header_buffers.size)
960 {
961 return NGX_DECLINED;
962 }
963
964 hc = r->http_connection;
965
966 if (hc->nfree) {
967 b = hc->free[--hc->nfree];
968
969 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
970 "http large header free: %p %uz",
971 b->pos, b->end - b->last);
972
973 } else if (hc->nbusy < cscf->large_client_header_buffers.num) {
974
975 if (hc->busy == NULL) {
976 hc->busy = ngx_palloc(r->connection->pool,
977 cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *));
978 if (hc->busy == NULL) {
979 return NGX_ERROR;
980 }
981 }
982
983 b = ngx_create_temp_buf(r->connection->pool,
984 cscf->large_client_header_buffers.size);
985 if (b == NULL) {
986 return NGX_ERROR;
987 }
988
989 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
990 "http large header alloc: %p %uz",
991 b->pos, b->end - b->last);
992
993 } else {
994 return NGX_DECLINED;
995 }
996
997 hc->busy[hc->nbusy++] = b;
998
999 if (r->state == 0) {
1000 /*
1001 * r->state == 0 means that a header line was parsed successfully
1002 * and we do not need to copy incomplete header line and
1003 * to relocate the parser header pointers
1004 */
1005
1006 r->request_length += r->header_in->end - r->header_in->start;
1007
1008 r->header_in = b;
1009
1010 return NGX_OK;
1011 }
1012
1013 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1014 "http large header copy: %d", r->header_in->pos - old);
1015
1016 r->request_length += old - r->header_in->start;
1017
1018 new = b->start;
1019
1020 ngx_memcpy(new, old, r->header_in->pos - old);
1021
1022 b->pos = new + (r->header_in->pos - old);
1023 b->last = new + (r->header_in->pos - old);
1024
1025 if (request_line) {
1026 r->request_start = new;
1027
1028 if (r->request_end) {
1029 r->request_end = new + (r->request_end - old);
1030 }
1031
1032 r->method_end = new + (r->method_end - old);
1033
1034 r->uri_start = new + (r->uri_start - old);
1035 r->uri_end = new + (r->uri_end - old);
1036
1037 if (r->schema_start) {
1038 r->schema_start = new + (r->schema_start - old);
1039 r->schema_end = new + (r->schema_end - old);
1040 }
1041
1042 if (r->host_start) {
1043 r->host_start = new + (r->host_start - old);
1044 r->host_end = new + (r->host_end - old);
1045 }
1046
1047 if (r->port_start) {
1048 r->port_start = new + (r->port_start - old);
1049 r->port_end = new + (r->port_end - old);
1050 }
1051
1052 if (r->uri_ext) {
1053 r->uri_ext = new + (r->uri_ext - old);
1054 }
1055
1056 if (r->args_start) {
1057 r->args_start = new + (r->args_start - old);
1058 }
1059
1060 } else {
1061 r->header_name_start = new;
1062 r->header_name_end = new + (r->header_name_end - old);
1063 r->header_start = new + (r->header_start - old);
1064 r->header_end = new + (r->header_end - old);
1065 }
1066
1067 r->header_in = b;
1068
1069 return NGX_OK;
1070 }
1071
1072
1073 static ngx_int_t ngx_http_process_request_header(ngx_http_request_t *r)
1074 {
1075 u_char *ua, *user_agent, ch;
1076 size_t len;
1077
1078 if (r->headers_in.host) {
1079 for (len = 0; len < r->headers_in.host->value.len; len++) {
1080 ch = r->headers_in.host->value.data[len];
1081
1082 if (ch == ':') {
1083 break;
1084 }
1085
1086 r->headers_in.host->value.data[len] = ngx_tolower(ch);
1087 }
1088 r->headers_in.host_name_len = len;
1089
1090 if (ngx_http_find_virtual_server(r) != NGX_OK) {
1091 return NGX_HTTP_PARSE_INVALID_HOST;
1092 }
1093
1094 } else {
1095 if (r->http_version > NGX_HTTP_VERSION_10) {
1096 return NGX_HTTP_PARSE_NO_HOST_HEADER;
1097 }
1098 r->headers_in.host_name_len = 0;
1099 }
1100
1101 if (r->headers_in.content_length) {
1102 r->headers_in.content_length_n =
1103 ngx_atoi(r->headers_in.content_length->value.data,
1104 r->headers_in.content_length->value.len);
1105
1106 if (r->headers_in.content_length_n == NGX_ERROR) {
1107 return NGX_HTTP_PARSE_INVALID_CL_HEADER;
1108 }
1109 }
1110
1111 if (r->method == NGX_HTTP_POST && r->headers_in.content_length_n == -1) {
1112 return NGX_HTTP_PARSE_POST_WO_CL_HEADER;
1113 }
1114
1115 if (r->plain_http) {
1116 return NGX_HTTP_PARSE_HTTP_TO_HTTPS;
1117 }
1118
1119 if (r->headers_in.connection) {
1120 if (r->headers_in.connection->value.len == 5
1121 && ngx_strcasecmp(r->headers_in.connection->value.data, "close")
1122 == 0)
1123 {
1124 r->headers_in.connection_type = NGX_HTTP_CONNECTION_CLOSE;
1125
1126 } else if (r->headers_in.connection->value.len == 10
1127 && ngx_strcasecmp(r->headers_in.connection->value.data,
1128 "keep-alive") == 0)
1129 {
1130 r->headers_in.connection_type = NGX_HTTP_CONNECTION_KEEP_ALIVE;
1131
1132 if (r->headers_in.keep_alive) {
1133 r->headers_in.keep_alive_n =
1134 ngx_atoi(r->headers_in.keep_alive->value.data,
1135 r->headers_in.keep_alive->value.len);
1136 }
1137 }
1138 }
1139
1140 if (r->headers_in.user_agent) {
1141
1142 /*
1143 * check some widespread browsers while the headers are still
1144 * in CPU cache
1145 */
1146
1147 user_agent = r->headers_in.user_agent->value.data;
1148
1149 ua = (u_char *) ngx_strstr(user_agent, "MSIE");
1150
1151 if (ua && ua + 8 < user_agent + r->headers_in.user_agent->value.len) {
1152
1153 r->headers_in.msie = 1;
1154
1155 if (ua[4] == ' ' && ua[5] == '4' && ua[6] == '.') {
1156 r->headers_in.msie4 = 1;
1157 }
1158
1159 #if 0
1160 /* MSIE ignores the SSL "close notify" alert */
1161 if (c->ssl) {
1162 r->connection->ssl->no_send_shut = 1;
1163 }
1164 #endif
1165 }
1166
1167 if (ngx_strstr(user_agent, "Opera")) {
1168 r->headers_in.opera = 1;
1169 r->headers_in.msie = 0;
1170 r->headers_in.msie4 = 0;
1171 }
1172
1173 if (!r->headers_in.msie && !r->headers_in.opera) {
1174
1175 if (ngx_strstr(user_agent, "Gecko/")) {
1176 r->headers_in.gecko = 1;
1177
1178 } else if (ngx_strstr(user_agent, "Konqueror")) {
1179 r->headers_in.konqueror = 1;
1180 }
1181 }
1182 }
1183
1184 return NGX_OK;
1185 }
1186
1187
1188 static ngx_int_t ngx_http_find_virtual_server(ngx_http_request_t *r)
1189 {
1190 ngx_int_t rc;
1191 ngx_uint_t i, n, key, found;
1192 ngx_http_server_name_t *name;
1193 ngx_http_core_main_conf_t *cmcf;
1194 ngx_http_core_srv_conf_t *cscf;
1195 ngx_http_core_loc_conf_t *clcf;
1196
1197 if (r->virtual_names->hash) {
1198 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
1199
1200 ngx_http_server_names_hash_key(key,
1201 r->headers_in.host->value.data,
1202 r->headers_in.host_name_len,
1203 cmcf->server_names_hash);
1204
1205 name = r->virtual_names->hash[key].elts;
1206 n = r->virtual_names->hash[key].nelts;
1207
1208 } else {
1209 name = r->virtual_names->names.elts;
1210 n = r->virtual_names->names.nelts;
1211 }
1212
1213 found = 0;
1214
1215 for (i = 0; i < n; i++) {
1216
1217 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1218 "server name: %V", &name[i].name);
1219
1220 if (r->headers_in.host_name_len != name[i].name.len) {
1221 continue;
1222 }
1223
1224 rc = ngx_strncmp(r->headers_in.host->value.data,
1225 name[i].name.data, name[i].name.len);
1226
1227 if (rc == 0) {
1228 r->server_name = name[i].name;
1229
1230 found = 1;
1231 break;
1232 }
1233
1234 if (rc < 0) {
1235 /* the server names are lexicographically sorted */
1236 break;
1237 }
1238 }
1239
1240 if (!found && r->virtual_names->wildcards.nelts) {
1241
1242 name = r->virtual_names->wildcards.elts;
1243 for (i = 0; i < r->virtual_names->wildcards.nelts; i++) {
1244
1245 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1246 "server name: %V", &name[i].name);
1247
1248 if (r->headers_in.host_name_len <= name[i].name.len) {
1249 continue;
1250 }
1251
1252 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1253 "server name: %s",
1254 r->headers_in.host->value.data
1255 + (r->headers_in.host_name_len - name[i].name.len));
1256
1257 if (ngx_strncmp(r->headers_in.host->value.data
1258 + (r->headers_in.host_name_len - name[i].name.len),
1259 name[i].name.data, name[i].name.len) == 0)
1260 {
1261 r->server_name.len = r->headers_in.host_name_len;
1262 r->server_name.data = r->headers_in.host->value.data;
1263
1264 found = 1;
1265 break;
1266 }
1267 }
1268 }
1269
1270 if (found) {
1271 r->srv_conf = name[i].core_srv_conf->ctx->srv_conf;
1272 r->loc_conf = name[i].core_srv_conf->ctx->loc_conf;
1273
1274 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1275 r->connection->log->file = clcf->err_log->file;
1276
1277 if (!(r->connection->log->log_level & NGX_LOG_DEBUG_CONNECTION)) {
1278 r->connection->log->log_level = clcf->err_log->log_level;
1279 }
1280
1281 return NGX_OK;
1282 }
1283
1284 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
1285
1286 if (cscf->restrict_host_names != NGX_HTTP_RESTRICT_HOST_OFF) {
1287 return NGX_ERROR;
1288 }
1289
1290 return NGX_OK;
1291 }
1292
1293
1294 void ngx_http_finalize_request(ngx_http_request_t *r, int rc)
1295 {
1296 ngx_http_core_loc_conf_t *clcf;
1297
1298 /* r may be already destroyed when rc == NGX_DONE */
1299
1300 if (rc == NGX_DONE || r->main) {
1301 return;
1302 }
1303
1304 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1305 "http finalize request: %d", rc);
1306
1307 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
1308
1309 if (r->connection->read->timer_set) {
1310 ngx_del_timer(r->connection->read);
1311 }
1312
1313 if (r->connection->write->timer_set) {
1314 ngx_del_timer(r->connection->write);
1315 }
1316
1317 if (rc == NGX_HTTP_CLIENT_CLOSED_REQUEST || r->closed) {
1318 ngx_http_close_request(r, 0);
1319 ngx_http_close_connection(r->connection);
1320 return;
1321 }
1322
1323 ngx_http_finalize_request(r, ngx_http_special_response_handler(r, rc));
1324
1325 return;
1326
1327 } else if (rc == NGX_ERROR) {
1328 ngx_http_close_request(r, 0);
1329 ngx_http_close_connection(r->connection);
1330 return;
1331
1332 } else if (rc == NGX_AGAIN) {
1333 ngx_http_set_write_handler(r);
1334 return;
1335 }
1336
1337 if (r->connection->read->timer_set) {
1338 ngx_del_timer(r->connection->read);
1339 }
1340
1341 if (r->connection->write->timer_set) {
1342 r->connection->write->delayed = 0;
1343 ngx_del_timer(r->connection->write);
1344 }
1345
1346 if (r->connection->read->pending_eof) {
1347 #if (NGX_HAVE_KQUEUE)
1348 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log,
1349 r->connection->read->kq_errno,
1350 "kevent() reported about an closed connection");
1351 #endif
1352 ngx_http_close_request(r, 0);
1353 ngx_http_close_connection(r->connection);
1354 return;
1355 }
1356
1357 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1358
1359 if (!ngx_terminate
1360 && !ngx_exiting
1361 && r->keepalive != 0
1362 && clcf->keepalive_timeout > 0)
1363 {
1364 ngx_http_set_keepalive(r);
1365 return;
1366
1367 } else if (r->lingering_close && clcf->lingering_timeout > 0) {
1368 ngx_http_set_lingering_close(r);
1369 return;
1370 }
1371
1372 ngx_http_close_request(r, 0);
1373 ngx_http_close_connection(r->connection);
1374 }
1375
1376
1377 static void ngx_http_set_write_handler(ngx_http_request_t *r)
1378 {
1379 ngx_event_t *wev;
1380 ngx_http_core_loc_conf_t *clcf;
1381
1382 wev = r->connection->write;
1383 wev->event_handler = ngx_http_writer;
1384
1385 r->http_state = NGX_HTTP_WRITING_REQUEST_STATE;
1386
1387 if (wev->ready && wev->delayed) {
1388 return;
1389 }
1390
1391 clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r,
1392 ngx_http_core_module);
1393 if (!wev->delayed) {
1394 ngx_add_timer(wev, clcf->send_timeout);
1395 }
1396
1397 if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) {
1398 ngx_http_close_request(r, 0);
1399 ngx_http_close_connection(r->connection);
1400 }
1401
1402 return;
1403 }
1404
1405
1406 void ngx_http_writer(ngx_event_t *wev)
1407 {
1408 int rc;
1409 ngx_connection_t *c;
1410 ngx_http_request_t *r;
1411 ngx_http_core_loc_conf_t *clcf;
1412
1413 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http writer handler");
1414
1415 c = wev->data;
1416 r = c->data;
1417
1418 if (wev->timedout) {
1419 if (!wev->delayed) {
1420 ngx_http_client_error(r, 0, NGX_HTTP_REQUEST_TIME_OUT);
1421 return;
1422 }
1423
1424 wev->timedout = 0;
1425 wev->delayed = 0;
1426
1427 if (!wev->ready) {
1428 clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r,
1429 ngx_http_core_module);
1430 ngx_add_timer(wev, clcf->send_timeout);
1431
1432 if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) {
1433 ngx_http_close_request(r, 0);
1434 ngx_http_close_connection(r->connection);
1435 }
1436
1437 return;
1438 }
1439
1440 } else {
1441 if (wev->delayed) {
1442 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0,
1443 "http writer delayed");
1444
1445 clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r,
1446 ngx_http_core_module);
1447
1448 if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) {
1449 ngx_http_close_request(r, 0);
1450 ngx_http_close_connection(r->connection);
1451 }
1452
1453 return;
1454 }
1455 }
1456
1457 rc = ngx_http_output_filter(r, NULL);
1458
1459 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
1460 "http writer output filter: %d", rc);
1461
1462 if (rc == NGX_AGAIN) {
1463 clcf = ngx_http_get_module_loc_conf(r->main ? r->main : r,
1464 ngx_http_core_module);
1465 if (!wev->ready && !wev->delayed) {
1466 ngx_add_timer(wev, clcf->send_timeout);
1467 }
1468
1469 if (ngx_handle_write_event(wev, clcf->send_lowat) == NGX_ERROR) {
1470 ngx_http_close_request(r, 0);
1471 ngx_http_close_connection(r->connection);
1472 }
1473
1474 return;
1475 }
1476
1477 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http writer done");
1478
1479 ngx_http_finalize_request(r, rc);
1480 }
1481
1482
1483 static void ngx_http_block_read(ngx_event_t *rev)
1484 {
1485 ngx_connection_t *c;
1486 ngx_http_request_t *r;
1487
1488 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http read blocked");
1489
1490 /* aio does not call this handler */
1491
1492 if ((ngx_event_flags & NGX_USE_LEVEL_EVENT) && rev->active) {
1493 if (ngx_del_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) {
1494 c = rev->data;
1495 r = c->data;
1496 ngx_http_close_request(r, 0);
1497 ngx_http_close_connection(c);
1498 }
1499 }
1500 }
1501
1502
1503 ngx_int_t ngx_http_discard_body(ngx_http_request_t *r)
1504 {
1505 ssize_t size;
1506 ngx_event_t *rev;
1507
1508 rev = r->connection->read;
1509
1510 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
1511
1512 if (rev->timer_set) {
1513 ngx_del_timer(rev);
1514 }
1515
1516 if (r->headers_in.content_length_n <= 0) {
1517 return NGX_OK;
1518 }
1519
1520 size = r->header_in->last - r->header_in->pos;
1521
1522 if (size) {
1523 if (r->headers_in.content_length_n > size) {
1524 r->headers_in.content_length_n -= size;
1525
1526 } else {
1527 r->header_in->pos += r->headers_in.content_length_n;
1528 r->headers_in.content_length_n = 0;
1529 return NGX_OK;
1530 }
1531 }
1532
1533 rev->event_handler = ngx_http_read_discarded_body_event;
1534
1535 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
1536 return NGX_HTTP_INTERNAL_SERVER_ERROR;
1537 }
1538
1539 return ngx_http_read_discarded_body(r);
1540 }
1541
1542
1543 static void ngx_http_read_discarded_body_event(ngx_event_t *rev)
1544 {
1545 ngx_int_t rc;
1546 ngx_connection_t *c;
1547 ngx_http_request_t *r;
1548
1549 c = rev->data;
1550 r = c->data;
1551
1552 rc = ngx_http_read_discarded_body(r);
1553
1554 if (rc == NGX_AGAIN) {
1555 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
1556 ngx_http_close_request(r, rc);
1557 ngx_http_close_connection(c);
1558 return;
1559 }
1560 }
1561
1562 if (rc != NGX_OK) {
1563 ngx_http_close_request(r, rc);
1564 ngx_http_close_connection(c);
1565 }
1566 }
1567
1568
1569 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r)
1570 {
1571 ssize_t size, n;
1572 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
1573
1574 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1575 "http read discarded body");
1576
1577 if (r->headers_in.content_length_n == 0) {
1578 return NGX_OK;
1579 }
1580
1581
1582 size = r->headers_in.content_length_n;
1583
1584 if (size > NGX_HTTP_DISCARD_BUFFER_SIZE) {
1585 size = NGX_HTTP_DISCARD_BUFFER_SIZE;
1586 }
1587
1588 n = r->connection->recv(r->connection, buffer, size);
1589
1590 if (n == NGX_ERROR) {
1591
1592 r->closed = 1;
1593
1594 /*
1595 * if a client request body is discarded then we already set
1596 * some HTTP response code for client and we can ignore the error
1597 */
1598
1599 return NGX_OK;
1600 }
1601
1602 if (n == NGX_AGAIN) {
1603 return NGX_AGAIN;
1604 }
1605
1606 r->headers_in.content_length_n -= n;
1607
1608 return NGX_OK;
1609 }
1610
1611
1612 static void ngx_http_set_keepalive(ngx_http_request_t *r)
1613 {
1614 int tcp_nodelay;
1615 ngx_int_t i;
1616 ngx_buf_t *b, *f;
1617 ngx_event_t *rev, *wev;
1618 ngx_connection_t *c;
1619 ngx_http_connection_t *hc;
1620 ngx_http_core_srv_conf_t *cscf;
1621 ngx_http_core_loc_conf_t *clcf;
1622
1623 c = r->connection;
1624 rev = c->read;
1625
1626 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "set http keepalive handler");
1627
1628 c->log->action = "closing request";
1629
1630 hc = r->http_connection;
1631 b = r->header_in;
1632
1633 if (b->pos < b->last) {
1634
1635 /* the pipelined request */
1636
1637 if (b != c->buffer) {
1638
1639 /*
1640 * If the large header buffers were allocated while the previous
1641 * request processing then we do not use c->buffer for
1642 * the pipelined request (see ngx_http_init_request()).
1643 *
1644 * Now we would move the large header buffers to the free list.
1645 */
1646
1647 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
1648
1649 if (hc->free == NULL) {
1650 hc->free = ngx_palloc(c->pool,
1651 cscf->large_client_header_buffers.num * sizeof(ngx_buf_t *));
1652
1653 if (hc->free == NULL) {
1654 ngx_http_close_request(r, 0);
1655 ngx_http_close_connection(c);
1656 return;
1657 }
1658 }
1659
1660 for (i = 0; i < hc->nbusy - 1; i++) {
1661 f = hc->busy[i];
1662 hc->free[hc->nfree++] = f;
1663 f->pos = f->start;
1664 f->last = f->start;
1665 }
1666
1667 hc->busy[0] = b;
1668 hc->nbusy = 1;
1669 }
1670 }
1671
1672 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1673
1674 ngx_http_close_request(r, 0);
1675 c->data = hc;
1676
1677 ngx_add_timer(rev, clcf->keepalive_timeout);
1678
1679 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
1680 ngx_http_close_connection(c);
1681 return;
1682 }
1683
1684 wev = c->write;
1685 wev->event_handler = ngx_http_empty_handler;
1686
1687 if (b->pos < b->last) {
1688
1689 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "pipelined request");
1690
1691 hc->pipeline = 1;
1692 c->log->action = "reading client pipelined request line";
1693 ngx_http_init_request(rev);
1694 return;
1695 }
1696
1697 hc->pipeline = 0;
1698
1699 /*
1700 * To keep a memory footprint as small as possible for an idle
1701 * keepalive connection we try to free the ngx_http_request_t and
1702 * c->buffer's memory if they were allocated outside the c->pool.
1703 * The large header buffers are always allocated outside the c->pool and
1704 * are freed too.
1705 */
1706
1707 if (ngx_pfree(c->pool, r) == NGX_OK) {
1708 hc->request = NULL;
1709 }
1710
1711 b = c->buffer;
1712
1713 if (ngx_pfree(c->pool, b->start) == NGX_OK) {
1714
1715 /*
1716 * the special note for ngx_http_keepalive_handler() that
1717 * c->buffer's memory was freed
1718 */
1719
1720 b->pos = NULL;
1721
1722 } else {
1723 b->pos = b->start;
1724 b->last = b->start;
1725 }
1726
1727 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc free: %p %d",
1728 hc->free, hc->nfree);
1729
1730 if (hc->free) {
1731 for (i = 0; i < hc->nfree; i++) {
1732 ngx_pfree(c->pool, hc->free[i]);
1733 hc->free[i] = NULL;
1734 }
1735
1736 hc->nfree = 0;
1737 }
1738
1739 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, "hc busy: %p %d",
1740 hc->busy, hc->nbusy);
1741
1742 if (hc->busy) {
1743 for (i = 0; i < hc->nbusy; i++) {
1744 ngx_pfree(c->pool, hc->busy[i]);
1745 hc->busy[i] = NULL;
1746 }
1747
1748 hc->nbusy = 0;
1749 }
1750
1751 rev->event_handler = ngx_http_keepalive_handler;
1752
1753 if (wev->active) {
1754 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
1755 if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT)
1756 == NGX_ERROR)
1757 {
1758 ngx_http_close_connection(c);
1759 return;
1760 }
1761
1762 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
1763 if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
1764 ngx_http_close_connection(c);
1765 return;
1766 }
1767 }
1768 }
1769
1770 c->log->action = "keepalive";
1771
1772 if (c->tcp_nopush == NGX_TCP_NOPUSH_SET) {
1773 if (ngx_tcp_push(c->fd) == NGX_ERROR) {
1774 ngx_connection_error(c, ngx_socket_errno, ngx_tcp_push_n " failed");
1775 ngx_http_close_connection(c);
1776 return;
1777 }
1778
1779 c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
1780 tcp_nodelay = ngx_tcp_nodelay_and_tcp_nopush ? 1 : 0;
1781
1782 } else {
1783 tcp_nodelay = 1;
1784 }
1785
1786 if (tcp_nodelay
1787 && clcf->tcp_nodelay
1788 && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET)
1789 {
1790 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay");
1791
1792 if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY,
1793 (const void *) &tcp_nodelay, sizeof(int)) == -1)
1794 {
1795 ngx_connection_error(c, ngx_socket_errno,
1796 "setsockopt(TCP_NODELAY) failed");
1797 ngx_http_close_connection(c);
1798 return;
1799 }
1800
1801 c->tcp_nodelay = NGX_TCP_NODELAY_SET;
1802 }
1803
1804 #if 0
1805 /* if ngx_http_request_t was freed then we need some other place */
1806 r->http_state = NGX_HTTP_KEEPALIVE_STATE;
1807 #endif
1808
1809 if (rev->ready) {
1810 ngx_http_keepalive_handler(rev);
1811 }
1812 }
1813
1814
1815 static void ngx_http_keepalive_handler(ngx_event_t *rev)
1816 {
1817 size_t size;
1818 ssize_t n;
1819 ngx_buf_t *b;
1820 ngx_connection_t *c;
1821 ngx_http_connection_t *hc;
1822
1823 c = rev->data;
1824
1825 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "http keepalive handler");
1826
1827 if (rev->timedout) {
1828 ngx_http_close_connection(c);
1829 return;
1830 }
1831
1832 #if (NGX_HAVE_KQUEUE)
1833
1834 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
1835 if (rev->pending_eof) {
1836 c->log->handler = NULL;
1837 ngx_log_error(NGX_LOG_INFO, c->log, rev->kq_errno,
1838 "kevent() reported that client %V closed "
1839 "keepalive connection", &c->addr_text);
1840 #if (NGX_HTTP_SSL)
1841 if (c->ssl) {
1842 c->ssl->no_send_shut = 1;
1843 }
1844 #endif
1845 ngx_http_close_connection(c);
1846 return;
1847 }
1848 }
1849
1850 #endif
1851
1852 hc = c->data;
1853 b = c->buffer;
1854 size = b->end - b->start;
1855
1856 if (b->pos == NULL) {
1857
1858 /*
1859 * The c->buffer's memory was freed by ngx_http_set_keepalive().
1860 * However, the c->buffer->start and c->buffer->end were not changed
1861 * to keep the buffer size.
1862 */
1863
1864 if (!(b->pos = ngx_palloc(c->pool, size))) {
1865 ngx_http_close_connection(c);
1866 return;
1867 }
1868
1869 b->start = b->pos;
1870 b->last = b->pos;
1871 b->end = b->pos + size;
1872 }
1873
1874 /*
1875 * MSIE closes a keepalive connection with RST flag
1876 * so we ignore ECONNRESET here.
1877 */
1878
1879 c->log_error = NGX_ERROR_IGNORE_ECONNRESET;
1880 ngx_set_socket_errno(0);
1881
1882 n = c->recv(c, b->last, size);
1883 c->log_error = NGX_ERROR_INFO;
1884
1885 if (n == NGX_AGAIN) {
1886 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
1887 ngx_http_close_connection(c);
1888 }
1889
1890 return;
1891 }
1892
1893 if (n == NGX_ERROR) {
1894 ngx_http_close_connection(c);
1895 return;
1896 }
1897
1898 c->log->handler = NULL;
1899
1900 if (n == 0) {
1901 ngx_log_error(NGX_LOG_INFO, c->log, ngx_socket_errno,
1902 "client %V closed keepalive connection", &c->addr_text);
1903 ngx_http_close_connection(c);
1904 return;
1905 }
1906
1907 b->last += n;
1908
1909 c->log->handler = ngx_http_log_error;
1910 c->log->action = "reading client request line";
1911
1912 ngx_http_init_request(rev);
1913 }
1914
1915
1916 static void ngx_http_set_lingering_close(ngx_http_request_t *r)
1917 {
1918 ngx_event_t *rev, *wev;
1919 ngx_connection_t *c;
1920 ngx_http_core_loc_conf_t *clcf;
1921
1922 c = r->connection;
1923
1924 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1925
1926 rev = c->read;
1927 rev->event_handler = ngx_http_lingering_close_handler;
1928
1929 r->lingering_time = ngx_time() + clcf->lingering_time / 1000;
1930 ngx_add_timer(rev, clcf->lingering_timeout);
1931
1932 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
1933 ngx_http_close_request(r, 0);
1934 ngx_http_close_connection(c);
1935 return;
1936 }
1937
1938 wev = c->write;
1939 wev->event_handler = ngx_http_empty_handler;
1940
1941 if (wev->active) {
1942 if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
1943 if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT)
1944 == NGX_ERROR)
1945 {
1946 ngx_http_close_request(r, 0);
1947 ngx_http_close_connection(c);
1948 return;
1949 }
1950
1951 } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
1952 if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
1953 ngx_http_close_request(r, 0);
1954 ngx_http_close_connection(c);
1955 return;
1956 }
1957 }
1958 }
1959
1960 if (ngx_shutdown_socket(c->fd, NGX_WRITE_SHUTDOWN) == -1) {
1961 ngx_connection_error(c, ngx_socket_errno,
1962 ngx_shutdown_socket_n " failed");
1963 ngx_http_close_request(r, 0);
1964 ngx_http_close_connection(c);
1965 return;
1966 }
1967
1968 if (rev->ready) {
1969 ngx_http_lingering_close_handler(rev);
1970 }
1971 }
1972
1973
1974 static void ngx_http_lingering_close_handler(ngx_event_t *rev)
1975 {
1976 ssize_t n;
1977 ngx_msec_t timer;
1978 ngx_connection_t *c;
1979 ngx_http_request_t *r;
1980 ngx_http_core_loc_conf_t *clcf;
1981 u_char buffer[NGX_HTTP_LINGERING_BUFFER_SIZE];
1982
1983 c = rev->data;
1984 r = c->data;
1985
1986 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
1987 "http lingering close handler");
1988
1989 if (rev->timedout) {
1990 ngx_http_close_request(r, 0);
1991 ngx_http_close_connection(c);
1992 return;
1993 }
1994
1995 timer = r->lingering_time - ngx_time();
1996 if (timer <= 0) {
1997 ngx_http_close_request(r, 0);
1998 ngx_http_close_connection(c);
1999 return;
2000 }
2001
2002 do {
2003 n = c->recv(c, buffer, NGX_HTTP_LINGERING_BUFFER_SIZE);
2004
2005 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0, "lingering read: %d", n);
2006
2007 if (n == NGX_ERROR || n == 0) {
2008 ngx_http_close_request(r, 0);
2009 ngx_http_close_connection(c);
2010 return;
2011 }
2012
2013 } while (rev->ready);
2014
2015 if (ngx_handle_level_read_event(rev) == NGX_ERROR) {
2016 ngx_http_close_request(r, 0);
2017 ngx_http_close_connection(c);
2018 return;
2019 }
2020
2021 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
2022
2023 timer *= 1000;
2024
2025 if (timer > clcf->lingering_timeout) {
2026 timer = clcf->lingering_timeout;
2027 }
2028
2029 ngx_add_timer(rev, timer);
2030 }
2031
2032
2033 void ngx_http_empty_handler(ngx_event_t *wev)
2034 {
2035 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, wev->log, 0, "http empty handler");
2036
2037 return;
2038 }
2039
2040
2041 ngx_int_t ngx_http_send_last(ngx_http_request_t *r)
2042 {
2043 ngx_buf_t *b;
2044 ngx_chain_t out;
2045
2046 if (!(b = ngx_calloc_buf(r->pool))) {
2047 return NGX_ERROR;
2048 }
2049
2050 b->last_buf = 1;
2051 out.buf = b;
2052 out.next = NULL;
2053
2054 return ngx_http_output_filter(r, &out);
2055 }
2056
2057
2058 void ngx_http_close_request(ngx_http_request_t *r, int error)
2059 {
2060 ngx_uint_t i;
2061 ngx_log_t *log;
2062 ngx_http_log_ctx_t *ctx;
2063 ngx_http_cleanup_t *cleanup;
2064 ngx_http_core_loc_conf_t *clcf;
2065 struct linger l;
2066
2067 log = r->connection->log;
2068
2069 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http close request");
2070
2071 if (r->pool == NULL) {
2072 ngx_log_error(NGX_LOG_ALERT, log, 0,
2073 "http request already closed");
2074 return;
2075 }
2076
2077 #if (NGX_STAT_STUB)
2078 if (r->stat_reading) {
2079 (*ngx_stat_reading)--;
2080 }
2081
2082 if (r->stat_writing) {
2083 (*ngx_stat_writing)--;
2084 }
2085 #endif
2086
2087 if (error && r->headers_out.status == 0) {
2088 r->headers_out.status = error;
2089 }
2090
2091 ngx_http_log_handler(r);
2092
2093 cleanup = r->cleanup.elts;
2094 for (i = 0; i < r->cleanup.nelts; i++) {
2095 if (!cleanup[i].valid) {
2096 continue;
2097 }
2098
2099 #if (NGX_HTTP_CACHE)
2100
2101 if (cleanup[i].cache) {
2102 ngx_http_cache_unlock(cleanup[i].data.cache.hash,
2103 cleanup[i].data.cache.cache, log);
2104 continue;
2105 }
2106
2107 #endif
2108
2109 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http cleanup fd: %d",
2110 cleanup[i].data.file.fd);
2111
2112 if (ngx_close_file(cleanup[i].data.file.fd) == NGX_FILE_ERROR) {
2113 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
2114 ngx_close_file_n " \"%s\" failed",
2115 cleanup[i].data.file.name);
2116 }
2117 }
2118
2119 /* STUB */
2120 if (r->file.fd != NGX_INVALID_FILE) {
2121 if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
2122 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
2123 ngx_close_file_n " \"%V\" failed", &r->file.name);
2124 }
2125 }
2126
2127 if (r->request_body
2128 && r->request_body->temp_file
2129 && r->request_body->temp_file->file.fd != NGX_INVALID_FILE)
2130 {
2131 if (ngx_close_file(r->request_body->temp_file->file.fd)
2132 == NGX_FILE_ERROR)
2133 {
2134 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
2135 ngx_close_file_n " deleted file \"%V\" failed",
2136 &r->request_body->temp_file->file.name);
2137 }
2138 }
2139
2140 if (r->connection->timedout) {
2141 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
2142
2143 if (clcf->reset_timedout_connection) {
2144 l.l_onoff = 1;
2145 l.l_linger = 0;
2146
2147 if (setsockopt(r->connection->fd, SOL_SOCKET, SO_LINGER,
2148 (const void *) &l, sizeof(struct linger)) == -1)
2149 {
2150 ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno,
2151 "setsockopt(SO_LINGER) failed");
2152 }
2153 }
2154 }
2155
2156 /* the variuos request strings were allocated from r->pool */
2157 ctx = log->data;
2158 ctx->request = NULL;
2159
2160 r->request_line.len = 0;
2161
2162 ngx_destroy_pool(r->pool);
2163 }
2164
2165
2166 #if (NGX_HTTP_SSL)
2167
2168 void ngx_ssl_close_handler(ngx_event_t *ev)
2169 {
2170 ngx_connection_t *c;
2171
2172 c = ev->data;
2173
2174 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ev->log, 0, "http ssl close handler");
2175
2176 if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
2177 return;
2178 }
2179
2180 ngx_http_close_connection(c);
2181 }
2182
2183 #endif
2184
2185
2186 void ngx_http_close_connection(ngx_connection_t *c)
2187 {
2188 ngx_pool_t *pool;
2189
2190 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
2191 "close http connection: %d", c->fd);
2192
2193 #if (NGX_OPENSSL)
2194
2195 if (c->ssl) {
2196 if (ngx_ssl_shutdown(c) == NGX_AGAIN) {
2197 c->read->event_handler = ngx_ssl_close_handler;
2198 c->write->event_handler = ngx_ssl_close_handler;
2199 return;
2200 }
2201 }
2202
2203 #endif
2204
2205 #if (NGX_STAT_STUB)
2206 (*ngx_stat_active)--;
2207 #endif
2208
2209 pool = c->pool;
2210
2211 ngx_close_connection(c);
2212
2213 ngx_destroy_pool(c->pool);
2214 }
2215
2216
2217 static void ngx_http_client_error(ngx_http_request_t *r,
2218 int client_error, int error)
2219 {
2220 u_char *p;
2221 ngx_http_log_ctx_t *ctx;
2222 ngx_http_core_srv_conf_t *cscf;
2223
2224 ctx = r->connection->log->data;
2225
2226 if (error == NGX_HTTP_REQUEST_TIME_OUT) {
2227 ngx_log_error(NGX_LOG_INFO, r->connection->log, NGX_ETIMEDOUT,
2228 "client timed out");
2229 r->connection->timedout = 1;
2230 ngx_http_close_request(r, error);
2231 ngx_http_close_connection(r->connection);
2232 return;
2233 }
2234
2235 r->connection->log->handler = NULL;
2236
2237 if (ctx->request) {
2238
2239 switch (client_error) {
2240
2241 case NGX_HTTP_PARSE_INVALID_HOST:
2242 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2243 "client %V sent invalid \"Host\" header \"%V\", URL: \"%V\"",
2244 ctx->client, &r->headers_in.host->value,
2245 &ctx->request->unparsed_uri);
2246
2247 error = NGX_HTTP_INVALID_HOST;
2248
2249 cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
2250
2251 if (cscf->restrict_host_names == NGX_HTTP_RESTRICT_HOST_CLOSE) {
2252 ngx_http_close_request(r, error);
2253 ngx_http_close_connection(r->connection);
2254 return;
2255 }
2256
2257 break;
2258
2259 case NGX_HTTP_PARSE_HTTP_TO_HTTPS:
2260 error = NGX_HTTP_TO_HTTPS;
2261 if (ctx->request->headers_in.referer) {
2262 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2263 "client %V sent plain HTTP request to HTTPS port, "
2264 "URL: \"%V\", referrer \"%V\"",
2265 ctx->client, &ctx->request->unparsed_uri,
2266 &ctx->request->headers_in.referer->value);
2267
2268 } else {
2269 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2270 "client %V sent plain HTTP request to HTTPS port, "
2271 "URL: \"%V\"", ctx->client, &ctx->request->unparsed_uri);
2272 }
2273
2274 break;
2275
2276 default:
2277 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2278 client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR],
2279 ctx->client, &ctx->request->unparsed_uri);
2280 }
2281
2282 } else {
2283
2284 if (error == NGX_HTTP_REQUEST_URI_TOO_LARGE) {
2285 r->request_line.len = r->header_in->end - r->request_start;
2286 r->request_line.data = r->request_start;
2287
2288 } else {
2289 if (r->request_line.data == NULL) {
2290 for (p = r->request_start; p < r->header_in->last; p++) {
2291 if (*p == CR || *p == LF) {
2292 break;
2293 }
2294 }
2295
2296 r->request_line.len = p - r->request_start;
2297 r->request_line.data = r->request_start;
2298 }
2299 }
2300
2301 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2302 client_header_errors[client_error - NGX_HTTP_CLIENT_ERROR],
2303 ctx->client, &r->request_line);
2304 }
2305
2306 r->connection->log->handler = ngx_http_log_error;
2307
2308 ngx_http_finalize_request(r, error);
2309 }
2310
2311
2312 static u_char *ngx_http_log_error(ngx_log_t *log, u_char *buf, size_t len)
2313 {
2314 u_char *p;
2315 ngx_http_log_ctx_t *ctx;
2316
2317 p = buf;
2318
2319 ctx = log->data;
2320
2321 if (log->action) {
2322 p = ngx_snprintf(p, len, " while %s", log->action);
2323 len -= p - buf;
2324 }
2325
2326 p = ngx_snprintf(p, len, ", client: %V", ctx->client);
2327
2328 if (ctx->request == NULL) {
2329 return p;
2330 }
2331
2332 len -= p - buf;
2333
2334 p = ngx_snprintf(p, len, ", URL: \"%V\"", &ctx->request->unparsed_uri);
2335
2336 if (ctx->request->headers_in.referer == NULL) {
2337 return p;
2338 }
2339
2340 len -= p - buf;
2341
2342 return ngx_snprintf(p, len, ", referrer: \"%V\"",
2343 &ctx->request->headers_in.referer->value);
2344 }
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