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comparison src/http/ngx_http_special_response.c-C @ 230:38e7b94d63ac NGINX_0_4_0

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nginx 0.4.0 *) Change in internal API: the HTTP modules initialization was moved from the init module phase to the HTTP postconfiguration phase. *) Change: now the request body is not read beforehand for the ngx_http_perl_module: it's required to start the reading using the $r->has_request_body method. *) Feature: the ngx_http_perl_module supports the DECLINED return code. *) Feature: the ngx_http_dav_module supports the incoming "Date" header line for the PUT method. *) Feature: the "ssi" directive is available inside the "if" block. *) Bugfix: a segmentation fault occurred if there was an "index" directive with variables and the first index name was without variables; bug appeared in 0.1.29.
author Igor Sysoev <http://sysoev.ru>
date Wed, 30 Aug 2006 00:00:00 +0400
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229:1965c8e23be7 230:38e7b94d63ac
1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9 #include <ngx_http.h>
10 #include <nginx.h>
11
12
13 static u_char error_tail[] =
14 "<hr><center>" NGINX_VER "</center>" CRLF
15 "</body>" CRLF
16 "</html>" CRLF
17 ;
18
19
20 static u_char ngx_http_msie_stub[] =
21 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
22 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
23 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
24 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
25 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
26 "<!-- The padding to disable MSIE's friendly error page -->" CRLF
27 ;
28
29
30 static char error_301_page[] =
31 "<html>" CRLF
32 "<head><title>301 Moved Permanently</title></head>" CRLF
33 "<body bgcolor=\"white\">" CRLF
34 "<center><h1>301 Moved Permanently</h1></center>" CRLF
35 ;
36
37
38 static char error_302_page[] =
39 "<html>" CRLF
40 "<head><title>302 Found</title></head>" CRLF
41 "<body bgcolor=\"white\">" CRLF
42 "<center><h1>302 Found</h1></center>" CRLF
43 ;
44
45
46 static char error_400_page[] =
47 "<html>" CRLF
48 "<head><title>400 Bad Request</title></head>" CRLF
49 "<body bgcolor=\"white\">" CRLF
50 "<center><h1>400 Bad Request</h1></center>" CRLF
51 ;
52
53
54 static char error_401_page[] =
55 "<html>" CRLF
56 "<head><title>401 Authorization Required</title></head>" CRLF
57 "<body bgcolor=\"white\">" CRLF
58 "<center><h1>401 Authorization Required</h1></center>" CRLF
59 ;
60
61
62 static char error_402_page[] =
63 "<html>" CRLF
64 "<head><title>402 Payment Required</title></head>" CRLF
65 "<body bgcolor=\"white\">" CRLF
66 "<center><h1>402 Payment Required</h1></center>" CRLF
67 ;
68
69
70 static char error_403_page[] =
71 "<html>" CRLF
72 "<head><title>403 Forbidden</title></head>" CRLF
73 "<body bgcolor=\"white\">" CRLF
74 "<center><h1>403 Forbidden</h1></center>" CRLF
75 ;
76
77
78 static char error_404_page[] =
79 "<html>" CRLF
80 "<head><title>404 Not Found</title></head>" CRLF
81 "<body bgcolor=\"white\">" CRLF
82 "<center><h1>404 Not Found</h1></center>" CRLF
83 ;
84
85
86 static char error_405_page[] =
87 "<html>" CRLF
88 "<head><title>405 Not Allowed</title></head>" CRLF
89 "<body bgcolor=\"white\">" CRLF
90 "<center><h1>405 Not Allowed</h1></center>" CRLF
91 ;
92
93
94 static char error_406_page[] =
95 "<html>" CRLF
96 "<head><title>406 Not Acceptable</title></head>" CRLF
97 "<body bgcolor=\"white\">" CRLF
98 "<center><h1>406 Not Acceptable</h1></center>" CRLF
99 ;
100
101
102 static char error_408_page[] =
103 "<html>" CRLF
104 "<head><title>408 Request Time-out</title></head>" CRLF
105 "<body bgcolor=\"white\">" CRLF
106 "<center><h1>408 Request Time-out</h1></center>" CRLF
107 ;
108
109
110 static char error_409_page[] =
111 "<html>" CRLF
112 "<head><title>409 Conflict</title></head>" CRLF
113 "<body bgcolor=\"white\">" CRLF
114 "<center><h1>409 Conflict</h1></center>" CRLF
115 ;
116
117
118 static char error_410_page[] =
119 "<html>" CRLF
120 "<head><title>410 Gone</title></head>" CRLF
121 "<body bgcolor=\"white\">" CRLF
122 "<center><h1>410 Gone</h1></center>" CRLF
123 ;
124
125
126 static char error_411_page[] =
127 "<html>" CRLF
128 "<head><title>411 Length Required</title></head>" CRLF
129 "<body bgcolor=\"white\">" CRLF
130 "<center><h1>411 Length Required</h1></center>" CRLF
131 ;
132
133
134 static char error_413_page[] =
135 "<html>" CRLF
136 "<head><title>413 Request Entity Too Large</title></head>" CRLF
137 "<body bgcolor=\"white\">" CRLF
138 "<center><h1>413 Request Entity Too Large</h1></center>" CRLF
139 ;
140
141
142 static char error_414_page[] =
143 "<html>" CRLF
144 "<head><title>414 Request-URI Too Large</title></head>" CRLF
145 "<body bgcolor=\"white\">" CRLF
146 "<center><h1>414 Request-URI Too Large</h1></center>" CRLF
147 ;
148
149
150 static char error_415_page[] =
151 "<html>" CRLF
152 "<head><title>415 Unsupported Media Type</title></head>" CRLF
153 "<body bgcolor=\"white\">" CRLF
154 "<center><h1>415 Unsupported Media Type</h1></center>" CRLF
155 ;
156
157
158 static char error_416_page[] =
159 "<html>" CRLF
160 "<head><title>416 Requested Range Not Satisfiable</title></head>" CRLF
161 "<body bgcolor=\"white\">" CRLF
162 "<center><h1>416 Requested Range Not Satisfiable</h1></center>" CRLF
163 ;
164
165
166 static char error_495_page[] =
167 "<html>" CRLF
168 "<head><title>400 The SSL certificate error</title></head>"
169 CRLF
170 "<body bgcolor=\"white\">" CRLF
171 "<center><h1>400 Bad Request</h1></center>" CRLF
172 "<center>The SSL certificate error</center>" CRLF
173 ;
174
175
176 static char error_496_page[] =
177 "<html>" CRLF
178 "<head><title>400 No required SSL certificate was sent</title></head>"
179 CRLF
180 "<body bgcolor=\"white\">" CRLF
181 "<center><h1>400 Bad Request</h1></center>" CRLF
182 "<center>No required SSL certificate was sent</center>" CRLF
183 ;
184
185
186 static char error_497_page[] =
187 "<html>" CRLF
188 "<head><title>400 The plain HTTP request was sent to HTTPS port</title></head>"
189 CRLF
190 "<body bgcolor=\"white\">" CRLF
191 "<center><h1>400 Bad Request</h1></center>" CRLF
192 "<center>The plain HTTP request was sent to HTTPS port</center>" CRLF
193 ;
194
195
196 static char error_500_page[] =
197 "<html>" CRLF
198 "<head><title>500 Internal Server Error</title></head>" CRLF
199 "<body bgcolor=\"white\">" CRLF
200 "<center><h1>500 Internal Server Error</h1></center>" CRLF
201 ;
202
203
204 static char error_501_page[] =
205 "<html>" CRLF
206 "<head><title>501 Method Not Implemented</title></head>" CRLF
207 "<body bgcolor=\"white\">" CRLF
208 "<center><h1>501 Method Not Implemented</h1></center>" CRLF
209 ;
210
211
212 static char error_502_page[] =
213 "<html>" CRLF
214 "<head><title>502 Bad Gateway</title></head>" CRLF
215 "<body bgcolor=\"white\">" CRLF
216 "<center><h1>502 Bad Gateway</h1></center>" CRLF
217 ;
218
219
220 static char error_503_page[] =
221 "<html>" CRLF
222 "<head><title>503 Service Temporarily Unavailable</title></head>" CRLF
223 "<body bgcolor=\"white\">" CRLF
224 "<center><h1>503 Service Temporarily Unavailable</h1></center>" CRLF
225 ;
226
227
228 static char error_504_page[] =
229 "<html>" CRLF
230 "<head><title>504 Gateway Time-out</title></head>" CRLF
231 "<body bgcolor=\"white\">" CRLF
232 "<center><h1>504 Gateway Time-out</h1></center>" CRLF
233 ;
234
235
236 static char error_507_page[] =
237 "<html>" CRLF
238 "<head><title>507 Insufficient Storage</title></head>" CRLF
239 "<body bgcolor=\"white\">" CRLF
240 "<center><h1>507 Insufficient Storage</h1></center>" CRLF
241 ;
242
243
244 static ngx_str_t error_pages[] = {
245
246 ngx_null_string, /* 201, 204 */
247
248 #define NGX_HTTP_LEVEL_200 1
249
250 /* ngx_null_string, */ /* 300 */
251 ngx_string(error_301_page),
252 ngx_string(error_302_page),
253 ngx_null_string, /* 303 */
254
255 #define NGX_HTTP_LEVEL_300 3
256
257 ngx_string(error_400_page),
258 ngx_string(error_401_page),
259 ngx_string(error_402_page),
260 ngx_string(error_403_page),
261 ngx_string(error_404_page),
262 ngx_string(error_405_page),
263 ngx_string(error_406_page),
264 ngx_null_string, /* 407 */
265 ngx_string(error_408_page),
266 ngx_string(error_409_page),
267 ngx_string(error_410_page),
268 ngx_string(error_411_page),
269 ngx_null_string, /* 412 */
270 ngx_string(error_413_page),
271 ngx_string(error_414_page),
272 ngx_string(error_415_page),
273 ngx_string(error_416_page),
274
275 #define NGX_HTTP_LEVEL_400 17
276
277 ngx_string(error_495_page), /* 495, https certificate error */
278 ngx_string(error_496_page), /* 496, https no certificate */
279 ngx_string(error_497_page), /* 497, http to https */
280 ngx_string(error_404_page), /* 498, invalid host name */
281 ngx_null_string, /* 499, client had closed connection */
282
283 ngx_string(error_500_page),
284 ngx_string(error_501_page),
285 ngx_string(error_502_page),
286 ngx_string(error_503_page),
287 ngx_string(error_504_page),
288 ngx_null_string, /* 505 */
289 ngx_null_string, /* 506 */
290 ngx_string(error_507_page)
291 };
292
293
294 ngx_int_t
295 ngx_http_special_response_handler(ngx_http_request_t *r, ngx_int_t error)
296 {
297 ngx_int_t rc;
298 ngx_buf_t *b;
299 ngx_str_t *uri;
300 ngx_uint_t i, n, err, msie_padding;
301 ngx_chain_t *out, *cl;
302 ngx_http_err_page_t *err_page;
303 ngx_http_core_loc_conf_t *clcf;
304
305 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
306 "http special response: %d, \"%V\"", error, &r->uri);
307
308 rc = ngx_http_discard_body(r);
309
310 if (rc == NGX_HTTP_INTERNAL_SERVER_ERROR) {
311 error = NGX_HTTP_INTERNAL_SERVER_ERROR;
312 }
313
314 r->headers_out.status = error;
315 r->err_status = error;
316
317 if (r->keepalive != 0) {
318 switch (error) {
319 case NGX_HTTP_BAD_REQUEST:
320 case NGX_HTTP_REQUEST_ENTITY_TOO_LARGE:
321 case NGX_HTTP_REQUEST_URI_TOO_LARGE:
322 case NGX_HTTP_TO_HTTPS:
323 case NGX_HTTPS_CERT_ERROR:
324 case NGX_HTTPS_NO_CERT:
325 case NGX_HTTP_INTERNAL_SERVER_ERROR:
326 r->keepalive = 0;
327 }
328 }
329
330 if (r->lingering_close == 1) {
331 switch (error) {
332 case NGX_HTTP_BAD_REQUEST:
333 case NGX_HTTP_TO_HTTPS:
334 case NGX_HTTPS_CERT_ERROR:
335 case NGX_HTTPS_NO_CERT:
336 r->lingering_close = 0;
337 }
338 }
339
340 r->headers_out.content_type.len = 0;
341
342 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
343
344 if (!r->error_page && clcf->error_pages) {
345
346 if (clcf->recursive_error_pages == 0) {
347 r->error_page = 1;
348 }
349
350 err_page = clcf->error_pages->elts;
351
352 for (i = 0; i < clcf->error_pages->nelts; i++) {
353
354 if (err_page[i].status == error) {
355 r->err_status = err_page[i].overwrite;
356
357 r->method = NGX_HTTP_GET;
358
359 uri = &err_page[i].uri;
360
361 if (err_page[i].uri_lengths) {
362 if (ngx_http_script_run(r, uri,
363 err_page[i].uri_lengths->elts, 0,
364 err_page[i].uri_values->elts)
365 == NULL)
366 {
367 return NGX_ERROR;
368 }
369
370 if (r->zero_in_uri) {
371 for (n = 0; n < uri->len; n++) {
372 if (uri->data[n] == '\0') {
373 goto zero;
374 }
375 }
376
377 r->zero_in_uri = 0;
378 }
379
380 } else {
381 r->zero_in_uri = 0;
382 }
383
384 zero:
385
386 if (uri->data[0] == '/') {
387 return ngx_http_internal_redirect(r, uri, NULL);
388 }
389
390 r->headers_out.location =
391 ngx_list_push(&r->headers_out.headers);
392
393 if (r->headers_out.location) {
394 error = NGX_HTTP_MOVED_TEMPORARILY;
395
396 r->err_status = NGX_HTTP_MOVED_TEMPORARILY;
397
398 r->headers_out.location->hash = 1;
399 r->headers_out.location->key.len = sizeof("Location") - 1;
400 r->headers_out.location->key.data = (u_char *) "Location";
401 r->headers_out.location->value = *uri;
402
403 } else {
404 return NGX_ERROR;
405 }
406 }
407 }
408 }
409
410 if (error == NGX_HTTP_CREATED) {
411 /* 201 */
412 err = 0;
413 r->header_only = 1;
414
415 } else if (error == NGX_HTTP_NO_CONTENT) {
416 /* 204 */
417 err = 0;
418
419 } else if (error < NGX_HTTP_BAD_REQUEST) {
420 /* 3XX */
421 err = error - NGX_HTTP_MOVED_PERMANENTLY + NGX_HTTP_LEVEL_200;
422
423 } else if (error < NGX_HTTP_OWN_CODES) {
424 /* 4XX */
425 err = error - NGX_HTTP_BAD_REQUEST + NGX_HTTP_LEVEL_200
426 + NGX_HTTP_LEVEL_300;
427
428 } else {
429 /* 49X, 5XX */
430 err = error - NGX_HTTP_OWN_CODES + NGX_HTTP_LEVEL_200
431 + NGX_HTTP_LEVEL_300
432 + NGX_HTTP_LEVEL_400;
433 switch (error) {
434 case NGX_HTTP_TO_HTTPS:
435 case NGX_HTTPS_CERT_ERROR:
436 case NGX_HTTPS_NO_CERT:
437 r->headers_out.status = NGX_HTTP_BAD_REQUEST;
438 error = NGX_HTTP_BAD_REQUEST;
439 break;
440 }
441 }
442
443 msie_padding = 0;
444
445 if (error_pages[err].len) {
446 r->headers_out.content_length_n = error_pages[err].len
447 + sizeof(error_tail) - 1;
448
449 if (clcf->msie_padding
450 && r->headers_in.msie
451 && r->http_version >= NGX_HTTP_VERSION_10
452 && error >= NGX_HTTP_BAD_REQUEST
453 && error != NGX_HTTP_REQUEST_URI_TOO_LARGE)
454 {
455 r->headers_out.content_length_n += sizeof(ngx_http_msie_stub) - 1;
456 msie_padding = 1;
457 }
458
459 r->headers_out.content_type.len = sizeof("text/html") - 1;
460 r->headers_out.content_type.data = (u_char *) "text/html";
461
462 } else {
463 r->headers_out.content_length_n = -1;
464 }
465
466 if (r->headers_out.content_length) {
467 r->headers_out.content_length->hash = 0;
468 r->headers_out.content_length = NULL;
469 }
470
471 ngx_http_clear_accept_ranges(r);
472 ngx_http_clear_last_modified(r);
473
474 rc = ngx_http_send_header(r);
475
476 if (rc == NGX_ERROR || r->header_only) {
477 return rc;
478 }
479
480 if (error_pages[err].len == 0) {
481 return NGX_OK;
482 }
483
484
485 b = ngx_calloc_buf(r->pool);
486 if (b == NULL) {
487 return NGX_ERROR;
488 }
489
490 b->memory = 1;
491 b->pos = error_pages[err].data;
492 b->last = error_pages[err].data + error_pages[err].len;
493
494 cl = ngx_alloc_chain_link(r->pool);
495 if (cl == NULL) {
496 return NGX_ERROR;
497 }
498
499 cl->buf = b;
500 out = cl;
501
502
503 b = ngx_calloc_buf(r->pool);
504 if (b == NULL) {
505 return NGX_ERROR;
506 }
507
508 b->memory = 1;
509 b->pos = error_tail;
510 b->last = error_tail + sizeof(error_tail) - 1;
511
512 cl->next = ngx_alloc_chain_link(r->pool);
513 if (cl->next == NULL) {
514 return NGX_ERROR;
515 }
516
517 cl = cl->next;
518 cl->buf = b;
519
520 if (msie_padding) {
521 b = ngx_calloc_buf(r->pool);
522 if (b == NULL) {
523 return NGX_ERROR;
524 }
525
526 b->memory = 1;
527 b->pos = ngx_http_msie_stub;
528 b->last = ngx_http_msie_stub + sizeof(ngx_http_msie_stub) - 1;
529
530 cl->next = ngx_alloc_chain_link(r->pool);
531 if (cl->next == NULL) {
532 return NGX_ERROR;
533 }
534
535 cl = cl->next;
536 cl->buf = b;
537 }
538
539 if (r == r->main) {
540 b->last_buf = 1;
541 }
542
543 b->last_in_chain = 1;
544
545 cl->next = NULL;
546
547 return ngx_http_output_filter(r, out);
548 }