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comparison src/http/modules/ngx_http_static_module.c @ 50:72eb30262aac NGINX_0_1_25

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nginx 0.1.25 *) Bugfix: nginx did run on Linux parisc. *) Feature: nginx now does not start under FreeBSD if the sysctl kern.ipc.somaxconn value is too big. *) Bugfix: if a request was internally redirected by the ngx_http_index_module module to the ngx_http_proxy_module or ngx_http_fastcgi_module modules, then the index file was not closed after request completion. *) Feature: the "proxy_pass" can be used in location with regular expression. *) Feature: the ngx_http_rewrite_filter_module module supports the condition like "if ($HTTP_USER_AGENT ~ MSIE)". *) Bugfix: nginx started too slow if the large number of addresses and text values were used in the "geo" directive. *) Change: a variable name must be declared as "$name" in the "geo" directive. The previous variant without "$" is still supported, but will be removed soon. *) Feature: the "%{VARIABLE}v" logging parameter. *) Feature: the "set $name value" directive. *) Bugfix: gcc 4.0 compatibility. *) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author Igor Sysoev <http://sysoev.ru>
date Sat, 19 Mar 2005 00:00:00 +0300
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children b55cbf18157e
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49:93dabbc9efb9 50:72eb30262aac
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
11
12 typedef struct {
13 ngx_http_cache_hash_t *redirect_cache;
14 } ngx_http_static_loc_conf_t;
15
16
17 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r);
18 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf);
19 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
20 void *parent, void *child);
21 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle);
22
23
24 static ngx_command_t ngx_http_static_commands[] = {
25
26 #if (NGX_HTTP_CACHE)
27
28 { ngx_string("redirect_cache"),
29 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3,
30 ngx_http_set_cache_slot,
31 NGX_HTTP_LOC_CONF_OFFSET,
32 offsetof(ngx_http_static_loc_conf_t, redirect_cache),
33 NULL },
34
35 #endif
36
37 ngx_null_command
38 };
39
40
41
42 ngx_http_module_t ngx_http_static_module_ctx = {
43 NULL, /* pre conf */
44
45 NULL, /* create main configuration */
46 NULL, /* init main configuration */
47
48 NULL, /* create server configuration */
49 NULL, /* merge server configuration */
50
51 ngx_http_static_create_loc_conf, /* create location configuration */
52 ngx_http_static_merge_loc_conf /* merge location configuration */
53 };
54
55
56 ngx_module_t ngx_http_static_module = {
57 NGX_MODULE,
58 &ngx_http_static_module_ctx, /* module context */
59 ngx_http_static_commands, /* module directives */
60 NGX_HTTP_MODULE, /* module type */
61 ngx_http_static_init, /* init module */
62 NULL /* init process */
63 };
64
65
66 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r)
67 {
68 u_char *last;
69 ngx_fd_t fd;
70 ngx_int_t rc;
71 ngx_uint_t level;
72 ngx_str_t name, location;
73 ngx_err_t err;
74 ngx_log_t *log;
75 ngx_buf_t *b;
76 ngx_chain_t out;
77 ngx_file_info_t fi;
78 ngx_http_cleanup_t *file_cleanup;
79 #if (NGX_HTTP_CACHE)
80 ngx_http_cleanup_t *redirect_cleanup;
81 #endif
82 ngx_http_core_loc_conf_t *clcf;
83 #if (NGX_HTTP_CACHE)
84 ngx_http_static_loc_conf_t *slcf;
85 uint32_t file_crc, redirect_crc;
86 ngx_http_cache_t *file, *redirect;
87 #endif
88
89 if (r->uri.data[r->uri.len - 1] == '/') {
90 return NGX_DECLINED;
91 }
92
93 /* TODO: Win32 */
94 if (r->zero_in_uri) {
95 return NGX_DECLINED;
96 }
97
98 if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) {
99 return NGX_HTTP_NOT_ALLOWED;
100 }
101
102 rc = ngx_http_discard_body(r);
103
104 if (rc != NGX_OK && rc != NGX_AGAIN) {
105 return rc;
106 }
107
108 #if (NGX_HTTP_CACHE)
109
110 /*
111 * there is a valid cached open file, i.e by the index handler,
112 * and it should be already registered in r->cleanup
113 */
114
115 if (r->cache && !r->cache->expired) {
116 return ngx_http_send_cached(r);
117 }
118
119 #endif
120
121 log = r->connection->log;
122
123 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
124
125 /*
126 * make a file name, reserve 2 bytes for a trailing '/'
127 * in a possible redirect and for the last '\0'
128 */
129
130 if (clcf->alias) {
131 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2
132 - clcf->name.len);
133 if (name.data == NULL) {
134 return NGX_HTTP_INTERNAL_SERVER_ERROR;
135 }
136
137 last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
138 last = ngx_cpystrn(last, r->uri.data + clcf->name.len,
139 r->uri.len + 1 - clcf->name.len);
140
141 name.len = last - name.data;
142
143 location.data = ngx_palloc(r->pool, r->uri.len + 2);
144 if (location.data == NULL) {
145 return NGX_HTTP_INTERNAL_SERVER_ERROR;
146 }
147
148 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
149
150 #if 0
151 /*
152 * aliases usually have trailling "/",
153 * set it in the start of the possible redirect
154 */
155
156 if (*location.data != '/') {
157 location.data--;
158 }
159 #endif
160
161 location.len = last - location.data + 1;
162
163 } else {
164 name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
165 if (name.data == NULL) {
166 return NGX_HTTP_INTERNAL_SERVER_ERROR;
167 }
168
169 location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
170 last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1);
171
172 name.len = last - name.data;
173 location.len = last - location.data + 1;
174 }
175
176 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
177 "http filename: \"%s\"", name.data);
178
179
180 /* allocate cleanups */
181
182 file_cleanup = ngx_array_push(&r->cleanup);
183 if (file_cleanup == NULL) {
184 return NGX_HTTP_INTERNAL_SERVER_ERROR;
185 }
186 file_cleanup->valid = 0;
187
188 #if (NGX_HTTP_CACHE)
189
190 slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module);
191 if (slcf->redirect_cache) {
192 redirect_cleanup = ngx_array_push(&r->cleanup);
193 if (redirect_cleanup == NULL) {
194 return NGX_HTTP_INTERNAL_SERVER_ERROR;
195 }
196 redirect_cleanup->valid = 0;
197
198 } else {
199 redirect_cleanup = NULL;
200 }
201
202 /* look up an open files cache */
203
204 if (clcf->open_files) {
205 file = ngx_http_cache_get(clcf->open_files, file_cleanup,
206 &name, &file_crc);
207
208 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
209 "http open file cache get: %p", file);
210
211 if (file && !file->expired) {
212 r->cache = file;
213 return ngx_http_send_cached(r);
214 }
215
216 } else {
217 file = NULL;
218 }
219
220
221 /* look up an redirect cache */
222
223 if (slcf->redirect_cache) {
224 redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup,
225 &name, &redirect_crc);
226
227 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
228 "http redirect cache get: %p", redirect);
229
230 if (redirect && !redirect->expired) {
231
232 /*
233 * We do not copy a cached value so the cache entry is locked
234 * until the end of the request. In a single threaded model
235 * the redirected request should complete before other event
236 * will be processed. In a multithreaded model this locking
237 * should keep more popular redirects in cache.
238 */
239
240 r->headers_out.location = ngx_http_add_header(&r->headers_out,
241 ngx_http_headers_out);
242 if (r->headers_out.location == NULL) {
243 return NGX_HTTP_INTERNAL_SERVER_ERROR;
244 }
245
246 r->headers_out.location->value = redirect->data.value;
247
248 return NGX_HTTP_MOVED_PERMANENTLY;
249 }
250
251 } else {
252 redirect = NULL;
253 }
254
255 #endif
256
257 /* open file */
258
259 #if (NGX_WIN9X)
260
261 /* TODO: redirect cache */
262
263 if (ngx_win32_version < NGX_WIN_NT) {
264
265 /*
266 * there is no way to open a file or a directory in Win9X with
267 * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag
268 * so we need to check its type before the opening
269 */
270
271 if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
272 err = ngx_errno;
273 ngx_log_error(NGX_LOG_ERR, log, err,
274 ngx_file_info_n " \"%s\" failed", name.data);
275
276 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
277 return NGX_HTTP_NOT_FOUND;
278
279 } else if (err == NGX_EACCES) {
280 return NGX_HTTP_FORBIDDEN;
281
282 } else {
283 return NGX_HTTP_INTERNAL_SERVER_ERROR;
284 }
285 }
286
287 if (ngx_is_dir(&fi)) {
288 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
289 "HTTP DIR: \"%s\"", name.data);
290
291 r->headers_out.location = ngx_http_add_header(&r->headers_out,
292 ngx_http_headers_out);
293 if (r->headers_out.location == NULL) {
294 return NGX_HTTP_INTERNAL_SERVER_ERROR;
295 }
296
297 *last++ = '/';
298 *last = '\0';
299 r->headers_out.location->value.len = last - location;
300 r->headers_out.location->value.data = location;
301
302 return NGX_HTTP_MOVED_PERMANENTLY;
303 }
304 }
305
306 #endif
307
308
309 fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN);
310
311 if (fd == NGX_INVALID_FILE) {
312 err = ngx_errno;
313
314 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
315 level = NGX_LOG_ERR;
316 rc = NGX_HTTP_NOT_FOUND;
317
318 } else if (err == NGX_EACCES) {
319 level = NGX_LOG_ERR;
320 rc = NGX_HTTP_FORBIDDEN;
321
322 } else {
323 level = NGX_LOG_CRIT;
324 rc = NGX_HTTP_INTERNAL_SERVER_ERROR;
325 }
326
327 ngx_log_error(level, log, err,
328 ngx_open_file_n " \"%s\" failed", name.data);
329
330 return rc;
331 }
332
333 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd);
334
335 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
336 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
337 ngx_fd_info_n " \"%s\" failed", name.data);
338
339 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
340 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
341 ngx_close_file_n " \"%s\" failed", name.data);
342 }
343
344 return NGX_HTTP_INTERNAL_SERVER_ERROR;
345 }
346
347 if (ngx_is_dir(&fi)) {
348
349 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir");
350
351 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
352 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
353 ngx_close_file_n " \"%s\" failed", name.data);
354 }
355
356 *last++ = '/';
357 *last = '\0';
358
359 r->headers_out.location = ngx_list_push(&r->headers_out.headers);
360 if (r->headers_out.location == NULL) {
361 return NGX_HTTP_INTERNAL_SERVER_ERROR;
362 }
363
364 r->headers_out.location->value = location;
365
366 #if (NGX_HTTP_CACHE)
367
368 if (slcf->redirect_cache) {
369 if (redirect) {
370 if (location.len == redirect->data.value.len
371 && ngx_memcmp(redirect->data.value.data, location.data,
372 location.len) == 0)
373 {
374 redirect->accessed = ngx_cached_time;
375 redirect->updated = ngx_cached_time;
376
377 /*
378 * we can unlock the cache entry because
379 * we have the local copy anyway
380 */
381
382 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
383 redirect_cleanup->valid = 0;
384
385 return NGX_HTTP_MOVED_PERMANENTLY;
386 }
387 }
388
389 location.len++;
390 redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect,
391 redirect_cleanup,
392 &name, redirect_crc,
393 &location, log);
394 location.len--;
395
396 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
397 "http redirect cache alloc: %p", redirect);
398
399 if (redirect) {
400 redirect->fd = NGX_INVALID_FILE;
401 redirect->accessed = ngx_cached_time;
402 redirect->last_modified = 0;
403 redirect->updated = ngx_cached_time;
404 redirect->memory = 1;
405 ngx_http_cache_unlock(slcf->redirect_cache, redirect, log);
406 redirect_cleanup->valid = 0;
407 }
408
409 }
410
411 #endif
412
413 return NGX_HTTP_MOVED_PERMANENTLY;
414 }
415
416 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */
417
418 if (!ngx_is_file(&fi)) {
419 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno,
420 "\"%s\" is not a regular file", name.data);
421
422 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
423 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
424 ngx_close_file_n " \"%s\" failed", name.data);
425 }
426
427 return NGX_HTTP_NOT_FOUND;
428 }
429
430 #endif
431
432
433 #if (NGX_HTTP_CACHE)
434
435 if (clcf->open_files) {
436
437 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
438
439 if (file && file->uniq == ngx_file_uniq(&fi)) {
440 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
441 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
442 ngx_close_file_n " \"%s\" failed", name.data);
443 }
444 file->accessed = ngx_cached_time;
445 file->updated = ngx_cached_time;
446 file->expired = 0;
447 r->cache = file;
448
449 return ngx_http_send_cached(r);
450
451 } else {
452 if (file) {
453 ngx_http_cache_unlock(clcf->open_files, file, log);
454 file = NULL;
455 }
456
457 file = ngx_http_cache_alloc(clcf->open_files, file,
458 file_cleanup,
459 &name, file_crc, NULL, log);
460 if (file) {
461 file->uniq = ngx_file_uniq(&fi);
462 }
463 }
464
465 #else
466 file = ngx_http_cache_alloc(clcf->open_files, file,
467 file_cleanup,
468 &name, file_crc, NULL, log);
469 #endif
470
471 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0,
472 "http open file cache alloc: %p", file);
473
474 if (file) {
475 file->fd = fd;
476 file->data.size = ngx_file_size(&fi);
477 file->accessed = ngx_cached_time;
478 file->last_modified = ngx_file_mtime(&fi);
479 file->updated = ngx_cached_time;
480 r->cache = file;
481 }
482
483 return ngx_http_send_cached(r);
484 }
485
486 #endif
487
488 log->action = "sending response to client";
489
490 file_cleanup->data.file.fd = fd;
491 file_cleanup->data.file.name = name.data;
492 file_cleanup->valid = 1;
493 file_cleanup->cache = 0;
494
495 r->headers_out.status = NGX_HTTP_OK;
496 r->headers_out.content_length_n = ngx_file_size(&fi);
497 r->headers_out.last_modified_time = ngx_file_mtime(&fi);
498
499 if (r->headers_out.content_length_n == 0) {
500 r->header_only = 1;
501 }
502
503 if (ngx_http_set_content_type(r) != NGX_OK) {
504 return NGX_HTTP_INTERNAL_SERVER_ERROR;
505 }
506
507 #if (NGX_SUPPRESS_WARN)
508 b = NULL;
509 #endif
510
511 if (!r->header_only) {
512 /* we need to allocate all before the header would be sent */
513
514 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
515 if (b == NULL) {
516 return NGX_HTTP_INTERNAL_SERVER_ERROR;
517 }
518
519 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
520 if (b->file == NULL) {
521 return NGX_HTTP_INTERNAL_SERVER_ERROR;
522 }
523
524 r->filter_allow_ranges = 1;
525 }
526
527 rc = ngx_http_send_header(r);
528
529 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
530 return rc;
531 }
532
533 b->in_file = 1;
534
535 if (!r->main) {
536 b->last_buf = 1;
537 }
538
539 b->file_pos = 0;
540 b->file_last = ngx_file_size(&fi);
541
542 b->file->fd = fd;
543 b->file->name = name;
544 b->file->log = log;
545
546 out.buf = b;
547 out.next = NULL;
548
549 return ngx_http_output_filter(r, &out);
550 }
551
552
553 static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf)
554 {
555 ngx_http_static_loc_conf_t *conf;
556
557 conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t));
558 if (conf == NULL) {
559 return NGX_CONF_ERROR;
560 }
561
562 conf->redirect_cache = NULL;
563
564 return conf;
565 }
566
567
568 static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf,
569 void *parent, void *child)
570 {
571 ngx_http_static_loc_conf_t *prev = parent;
572 ngx_http_static_loc_conf_t *conf = child;
573
574 if (conf->redirect_cache == NULL) {
575 conf->redirect_cache = prev->redirect_cache;
576 }
577
578 return NGX_CONF_OK;
579 }
580
581
582 static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle)
583 {
584 ngx_http_handler_pt *h;
585 ngx_http_core_main_conf_t *cmcf;
586
587 cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module);
588
589 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers);
590 if (h == NULL) {
591 return NGX_ERROR;
592 }
593
594 *h = ngx_http_static_handler;
595
596 return NGX_OK;
597 }