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 <ngx_md5.h>
11
12
13 static ngx_int_t ngx_http_file_cache_read(ngx_http_request_t *r,
14 ngx_http_cache_t *c);
15 #if (NGX_HAVE_FILE_AIO)
16 static void ngx_http_cache_aio_event_handler(ngx_event_t *ev);
17 #endif
18 static ngx_int_t ngx_http_file_cache_exists(ngx_http_file_cache_t *cache,
19 ngx_http_cache_t *c);
20 static ngx_http_file_cache_node_t *
21 ngx_http_file_cache_lookup(ngx_http_file_cache_t *cache, u_char *key);
22 static void ngx_http_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
23 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
24 static void ngx_http_file_cache_cleanup(void *data);
25 static time_t ngx_http_file_cache_forced_expire(ngx_http_file_cache_t *cache);
26 static time_t ngx_http_file_cache_expire(ngx_http_file_cache_t *cache);
27 static void ngx_http_file_cache_delete(ngx_http_file_cache_t *cache,
28 ngx_queue_t *q, u_char *name);
29 static ngx_int_t
30 ngx_http_file_cache_manager_sleep(ngx_http_file_cache_t *cache);
31 static ngx_int_t ngx_http_file_cache_noop(ngx_tree_ctx_t *ctx,
32 ngx_str_t *path);
33 static ngx_int_t ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx,
34 ngx_str_t *path);
35 static ngx_int_t ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx,
36 ngx_str_t *path);
37 static ngx_int_t ngx_http_file_cache_add(ngx_http_file_cache_t *cache,
38 ngx_http_cache_t *c);
39 static ngx_int_t ngx_http_file_cache_delete_file(ngx_tree_ctx_t *ctx,
40 ngx_str_t *path);
41
42
43 ngx_str_t ngx_http_cache_status[] = {
44 ngx_string("MISS"),
45 ngx_string("EXPIRED"),
46 ngx_string("STALE"),
47 ngx_string("UPDATING"),
48 ngx_string("HIT")
49 };
50
51
52 static u_char ngx_http_file_cache_key[] = { LF, 'K', 'E', 'Y', ':', ' ' };
53
54
55 static ngx_int_t
56 ngx_http_file_cache_init(ngx_shm_zone_t *shm_zone, void *data)
57 {
58 ngx_http_file_cache_t *ocache = data;
59
60 size_t len;
61 ngx_uint_t n;
62 ngx_http_file_cache_t *cache;
63
64 cache = shm_zone->data;
65
66 if (ocache) {
67 if (ngx_strcmp(cache->path->name.data, ocache->path->name.data) != 0) {
68 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
69 "cache \"%V\" uses the \"%V\" cache path "
70 "while previously it used the \"%V\" cache path",
71 &shm_zone->shm.name, &cache->path->name,
72 &ocache->path->name);
73
74 return NGX_ERROR;
75 }
76
77 for (n = 0; n < 3; n++) {
78 if (cache->path->level[n] != ocache->path->level[n]) {
79 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
80 "cache \"%V\" had previously different levels",
81 &shm_zone->shm.name);
82 return NGX_ERROR;
83 }
84 }
85
86 cache->sh = ocache->sh;
87
88 cache->shpool = ocache->shpool;
89 cache->bsize = ocache->bsize;
90
91 cache->max_size /= cache->bsize;
92
93 if (!cache->sh->cold || cache->sh->loading) {
94 cache->path->loader = NULL;
95 }
96
97 return NGX_OK;
98 }
99
100 cache->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
101
102 if (shm_zone->shm.exists) {
103 cache->sh = cache->shpool->data;
104 cache->bsize = ngx_fs_bsize(cache->path->name.data);
105
106 return NGX_OK;
107 }
108
109 cache->sh = ngx_slab_alloc(cache->shpool, sizeof(ngx_http_file_cache_sh_t));
110 if (cache->sh == NULL) {
111 return NGX_ERROR;
112 }
113
114 cache->shpool->data = cache->sh;
115
116 ngx_rbtree_init(&cache->sh->rbtree, &cache->sh->sentinel,
117 ngx_http_file_cache_rbtree_insert_value);
118
119 ngx_queue_init(&cache->sh->queue);
120
121 cache->sh->cold = 1;
122 cache->sh->loading = 0;
123 cache->sh->size = 0;
124
125 cache->bsize = ngx_fs_bsize(cache->path->name.data);
126
127 cache->max_size /= cache->bsize;
128
129 len = sizeof(" in cache keys zone \"\"") + shm_zone->shm.name.len;
130
131 cache->shpool->log_ctx = ngx_slab_alloc(cache->shpool, len);
132 if (cache->shpool->log_ctx == NULL) {
133 return NGX_ERROR;
134 }
135
136 ngx_sprintf(cache->shpool->log_ctx, " in cache keys zone \"%V\"%Z",
137 &shm_zone->shm.name);
138
139 return NGX_OK;
140 }
141
142
143 void
144 ngx_http_file_cache_create_key(ngx_http_request_t *r)
145 {
146 size_t len;
147 ngx_str_t *key;
148 ngx_uint_t i;
149 ngx_md5_t md5;
150 ngx_http_cache_t *c;
151
152 c = r->cache;
153
154 len = 0;
155
156 ngx_crc32_init(c->crc32);
157 ngx_md5_init(&md5);
158
159 key = c->keys.elts;
160 for (i = 0; i < c->keys.nelts; i++) {
161 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
162 "http cache key: \"%V\"", &key[i]);
163
164 len += key[i].len;
165
166 ngx_crc32_update(&c->crc32, key[i].data, key[i].len);
167 ngx_md5_update(&md5, key[i].data, key[i].len);
168 }
169
170 c->header_start = sizeof(ngx_http_file_cache_header_t)
171 + sizeof(ngx_http_file_cache_key) + len + 1;
172
173 ngx_crc32_final(c->crc32);
174 ngx_md5_final(c->key, &md5);
175 }
176
177
178 ngx_int_t
179 ngx_http_file_cache_open(ngx_http_request_t *r)
180 {
181 u_char *p;
182 ngx_int_t rc, rv;
183 ngx_uint_t cold, test;
184 ngx_path_t *path;
185 ngx_http_cache_t *c;
186 ngx_pool_cleanup_t *cln;
187 ngx_open_file_info_t of;
188 ngx_http_file_cache_t *cache;
189 ngx_http_core_loc_conf_t *clcf;
190
191 c = r->cache;
192
193 if (c->buf) {
194 return ngx_http_file_cache_read(r, c);
195 }
196
197 cache = c->file_cache;
198
199 cln = ngx_pool_cleanup_add(r->pool, 0);
200 if (cln == NULL) {
201 return NGX_ERROR;
202 }
203
204 rc = ngx_http_file_cache_exists(cache, c);
205
206 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
207 "http file cache exists: %i e:%d", rc, c->exists);
208
209 if (rc == NGX_ERROR) {
210 return rc;
211 }
212
213 cln->handler = ngx_http_file_cache_cleanup;
214 cln->data = c;
215
216 if (rc == NGX_AGAIN) {
217 return NGX_HTTP_CACHE_SCARCE;
218 }
219
220 cold = cache->sh->cold;
221
222 if (rc == NGX_OK) {
223
224 if (c->error) {
225 return c->error;
226 }
227
228 c->temp_file = 1;
229 test = c->exists ? 1 : 0;
230 rv = NGX_DECLINED;
231
232 } else { /* rc == NGX_DECLINED */
233
234 if (c->min_uses > 1) {
235
236 if (!cold) {
237 return NGX_HTTP_CACHE_SCARCE;
238 }
239
240 test = 1;
241 rv = NGX_HTTP_CACHE_SCARCE;
242
243 } else {
244 c->temp_file = 1;
245 test = cold ? 1 : 0;
246 rv = NGX_DECLINED;
247 }
248 }
249
250 path = cache->path;
251
252 c->file.name.len = path->name.len + 1 + path->len
253 + 2 * NGX_HTTP_CACHE_KEY_LEN;
254
255 c->file.name.data = ngx_pnalloc(r->pool, c->file.name.len + 1);
256 if (c->file.name.data == NULL) {
257 return NGX_ERROR;
258 }
259
260 ngx_memcpy(c->file.name.data, path->name.data, path->name.len);
261
262 p = c->file.name.data + path->name.len + 1 + path->len;
263 p = ngx_hex_dump(p, c->key, NGX_HTTP_CACHE_KEY_LEN);
264 *p = '\0';
265
266 ngx_create_hashed_filename(path, c->file.name.data, c->file.name.len);
267
268 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
269 "cache file: \"%s\"", c->file.name.data);
270
271 if (!test) {
272 return NGX_DECLINED;
273 }
274
275 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
276
277 ngx_memzero(&of, sizeof(ngx_open_file_info_t));
278
279 of.uniq = c->uniq;
280 of.valid = clcf->open_file_cache_valid;
281 of.min_uses = clcf->open_file_cache_min_uses;
282 of.events = clcf->open_file_cache_events;
283 of.directio = NGX_OPEN_FILE_DIRECTIO_OFF;
284 of.read_ahead = clcf->read_ahead;
285
286 if (ngx_open_cached_file(clcf->open_file_cache, &c->file.name, &of, r->pool)
287 != NGX_OK)
288 {
289 switch (of.err) {
290
291 case 0:
292 return NGX_ERROR;
293
294 case NGX_ENOENT:
295 case NGX_ENOTDIR:
296 return rv;
297
298 default:
299 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
300 ngx_open_file_n " \"%s\" failed", c->file.name.data);
301 return NGX_ERROR;
302 }
303 }
304
305 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
306 "http file cache fd: %d", of.fd);
307
308 c->file.fd = of.fd;
309 c->file.log = r->connection->log;
310 c->uniq = of.uniq;
311 c->length = of.size;
312
313 c->buf = ngx_create_temp_buf(r->pool, c->body_start);
314 if (c->buf == NULL) {
315 return NGX_ERROR;
316 }
317
318 return ngx_http_file_cache_read(r, c);
319 }
320
321
322 static ngx_int_t
323 ngx_http_file_cache_read(ngx_http_request_t *r, ngx_http_cache_t *c)
324 {
325 time_t now;
326 ssize_t n;
327 ngx_int_t rc;
328 ngx_http_file_cache_t *cache;
329 ngx_http_file_cache_header_t *h;
330
331 c = r->cache;
332
333 #if (NGX_HAVE_FILE_AIO)
334 {
335 ngx_http_core_loc_conf_t *clcf;
336
337 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
338
339 if (clcf->aio) {
340 n = ngx_file_aio_read(&c->file, c->buf->pos, c->body_start, 0, r->pool);
341
342 if (n == NGX_AGAIN) {
343 c->file.aio->data = r;
344 c->file.aio->handler = ngx_http_cache_aio_event_handler;
345
346 r->main->blocked++;
347 r->aio = 1;
348
349 return NGX_AGAIN;
350 }
351
352 } else {
353 n = ngx_read_file(&c->file, c->buf->pos, c->body_start, 0);
354 }
355 }
356 #else
357
358 n = ngx_read_file(&c->file, c->buf->pos, c->body_start, 0);
359
360 #endif
361
362 if (n == NGX_ERROR) {
363 return n;
364 }
365
366 if ((size_t) n <= c->header_start) {
367 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
368 "cache file \"%s\" is too small", c->file.name.data);
369 return NGX_ERROR;
370 }
371
372 h = (ngx_http_file_cache_header_t *) c->buf->pos;
373
374 if (h->crc32 != c->crc32 || (size_t) h->header_start != c->header_start) {
375 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
376 "cache file \"%s\" has md5 collision", c->file.name.data);
377 return NGX_DECLINED;
378 }
379
380 c->buf->last += n;
381
382 c->valid_sec = h->valid_sec;
383 c->last_modified = h->last_modified;
384 c->date = h->date;
385 c->valid_msec = h->valid_msec;
386 c->body_start = h->body_start;
387
388 r->cached = 1;
389
390 cache = c->file_cache;
391
392 if (cache->sh->cold) {
393
394 ngx_shmtx_lock(&cache->shpool->mutex);
395
396 if (!c->node->exists) {
397 c->node->uses = 1;
398 c->node->body_start = c->body_start;
399 c->node->exists = 1;
400 c->node->uniq = c->uniq;
401
402 cache->sh->size += (c->length + cache->bsize - 1) / cache->bsize;
403 }
404
405 ngx_shmtx_unlock(&cache->shpool->mutex);
406 }
407
408 now = ngx_time();
409
410 if (c->valid_sec < now) {
411
412 ngx_shmtx_lock(&cache->shpool->mutex);
413
414 if (c->node->updating) {
415 rc = NGX_HTTP_CACHE_UPDATING;
416
417 } else {
418 c->node->updating = 1;
419 rc = NGX_HTTP_CACHE_STALE;
420 }
421
422 ngx_shmtx_unlock(&cache->shpool->mutex);
423
424 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
425 "http file cache expired: %i %T %T",
426 rc, c->valid_sec, now);
427
428 return rc;
429 }
430
431 return NGX_OK;
432 }
433
434
435 #if (NGX_HAVE_FILE_AIO)
436
437
438 static void
439 ngx_http_cache_aio_event_handler(ngx_event_t *ev)
440 {
441 ngx_event_aio_t *aio;
442 ngx_http_request_t *r;
443
444 aio = ev->data;
445 r = aio->data;
446
447 r->main->blocked--;
448 r->aio = 0;
449
450 r->connection->write->handler(r->connection->write);
451 }
452
453 #endif
454
455
456 static ngx_int_t
457 ngx_http_file_cache_exists(ngx_http_file_cache_t *cache, ngx_http_cache_t *c)
458 {
459 ngx_int_t rc;
460 ngx_http_file_cache_node_t *fcn;
461
462 ngx_shmtx_lock(&cache->shpool->mutex);
463
464 fcn = ngx_http_file_cache_lookup(cache, c->key);
465
466 if (fcn) {
467 ngx_queue_remove(&fcn->queue);
468
469 if (fcn->error) {
470
471 if (fcn->valid_sec < ngx_time()) {
472 goto renew;
473 }
474
475 rc = NGX_OK;
476
477 goto done;
478 }
479
480 fcn->uses++;
481 fcn->count++;
482
483 if (fcn->exists) {
484
485 c->exists = fcn->exists;
486 c->body_start = fcn->body_start;
487
488 rc = NGX_OK;
489
490 goto done;
491 }
492
493 if (fcn->uses >= c->min_uses) {
494
495 c->exists = fcn->exists;
496 c->body_start = fcn->body_start;
497
498 rc = NGX_OK;
499
500 } else {
501 rc = NGX_AGAIN;
502 }
503
504 goto done;
505 }
506
507 fcn = ngx_slab_alloc_locked(cache->shpool,
508 sizeof(ngx_http_file_cache_node_t));
509 if (fcn == NULL) {
510 ngx_shmtx_unlock(&cache->shpool->mutex);
511
512 (void) ngx_http_file_cache_forced_expire(cache);
513
514 ngx_shmtx_lock(&cache->shpool->mutex);
515
516 fcn = ngx_slab_alloc_locked(cache->shpool,
517 sizeof(ngx_http_file_cache_node_t));
518 if (fcn == NULL) {
519 rc = NGX_ERROR;
520 goto failed;
521 }
522 }
523
524 ngx_memcpy((u_char *) &fcn->node.key, c->key, sizeof(ngx_rbtree_key_t));
525
526 ngx_memcpy(fcn->key, &c->key[sizeof(ngx_rbtree_key_t)],
527 NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
528
529 ngx_rbtree_insert(&cache->sh->rbtree, &fcn->node);
530
531 renew:
532
533 rc = NGX_DECLINED;
534
535 fcn->uses = 1;
536 fcn->count = 1;
537 fcn->valid_msec = 0;
538 fcn->error = 0;
539 fcn->exists = 0;
540 fcn->valid_sec = 0;
541 fcn->uniq = 0;
542 fcn->body_start = 0;
543 fcn->length = 0;
544
545 done:
546
547 fcn->expire = ngx_time() + cache->inactive;
548
549 ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
550
551 c->uniq = fcn->uniq;
552 c->error = fcn->error;
553 c->node = fcn;
554
555 failed:
556
557 ngx_shmtx_unlock(&cache->shpool->mutex);
558
559 return rc;
560 }
561
562
563 static ngx_http_file_cache_node_t *
564 ngx_http_file_cache_lookup(ngx_http_file_cache_t *cache, u_char *key)
565 {
566 ngx_int_t rc;
567 ngx_rbtree_key_t node_key;
568 ngx_rbtree_node_t *node, *sentinel;
569 ngx_http_file_cache_node_t *fcn;
570
571 ngx_memcpy((u_char *) &node_key, key, sizeof(ngx_rbtree_key_t));
572
573 node = cache->sh->rbtree.root;
574 sentinel = cache->sh->rbtree.sentinel;
575
576 while (node != sentinel) {
577
578 if (node_key < node->key) {
579 node = node->left;
580 continue;
581 }
582
583 if (node_key > node->key) {
584 node = node->right;
585 continue;
586 }
587
588 /* node_key == node->key */
589
590 do {
591 fcn = (ngx_http_file_cache_node_t *) node;
592
593 rc = ngx_memcmp(&key[sizeof(ngx_rbtree_key_t)], fcn->key,
594 NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
595
596 if (rc == 0) {
597 return fcn;
598 }
599
600 node = (rc < 0) ? node->left : node->right;
601
602 } while (node != sentinel && node_key == node->key);
603
604 break;
605 }
606
607 /* not found */
608
609 return NULL;
610 }
611
612
613 static void
614 ngx_http_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
615 ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
616 {
617 ngx_rbtree_node_t **p;
618 ngx_http_file_cache_node_t *cn, *cnt;
619
620 for ( ;; ) {
621
622 if (node->key < temp->key) {
623
624 p = &temp->left;
625
626 } else if (node->key > temp->key) {
627
628 p = &temp->right;
629
630 } else { /* node->key == temp->key */
631
632 cn = (ngx_http_file_cache_node_t *) node;
633 cnt = (ngx_http_file_cache_node_t *) temp;
634
635 p = (ngx_memcmp(cn->key, cnt->key,
636 NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t))
637 < 0)
638 ? &temp->left : &temp->right;
639 }
640
641 if (*p == sentinel) {
642 break;
643 }
644
645 temp = *p;
646 }
647
648 *p = node;
649 node->parent = temp;
650 node->left = sentinel;
651 node->right = sentinel;
652 ngx_rbt_red(node);
653 }
654
655
656 void
657 ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf)
658 {
659 ngx_http_file_cache_header_t *h = (ngx_http_file_cache_header_t *) buf;
660
661 u_char *p;
662 ngx_str_t *key;
663 ngx_uint_t i;
664 ngx_http_cache_t *c;
665
666 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
667 "http file cache set header");
668
669 c = r->cache;
670
671 h->valid_sec = c->valid_sec;
672 h->last_modified = c->last_modified;
673 h->date = c->date;
674 h->crc32 = c->crc32;
675 h->valid_msec = (u_short) c->valid_msec;
676 h->header_start = (u_short) c->header_start;
677 h->body_start = (u_short) c->body_start;
678
679 p = buf + sizeof(ngx_http_file_cache_header_t);
680
681 p = ngx_cpymem(p, ngx_http_file_cache_key, sizeof(ngx_http_file_cache_key));
682
683 key = c->keys.elts;
684 for (i = 0; i < c->keys.nelts; i++) {
685 p = ngx_copy(p, key[i].data, key[i].len);
686 }
687
688 *p = LF;
689 }
690
691
692 void
693 ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf)
694 {
695 off_t size, length;
696 ngx_int_t rc;
697 ngx_file_uniq_t uniq;
698 ngx_file_info_t fi;
699 ngx_http_cache_t *c;
700 ngx_ext_rename_file_t ext;
701 ngx_http_file_cache_t *cache;
702
703 c = r->cache;
704
705 if (c->updated) {
706 return;
707 }
708
709 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
710 "http file cache update");
711
712 c->updated = 1;
713
714 cache = c->file_cache;
715
716 uniq = 0;
717 length = 0;
718
719 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
720 "http file cache rename: \"%s\" to \"%s\"",
721 tf->file.name.data, c->file.name.data);
722
723 ext.access = NGX_FILE_OWNER_ACCESS;
724 ext.path_access = NGX_FILE_OWNER_ACCESS;
725 ext.time = -1;
726 ext.create_path = 1;
727 ext.delete_file = 1;
728 ext.log = r->connection->log;
729
730 rc = ngx_ext_rename_file(&tf->file.name, &c->file.name, &ext);
731
732 if (rc == NGX_OK) {
733
734 if (ngx_fd_info(tf->file.fd, &fi) == NGX_FILE_ERROR) {
735 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
736 ngx_fd_info_n " \"%s\" failed", tf->file.name.data);
737
738 rc = NGX_ERROR;
739
740 } else {
741 uniq = ngx_file_uniq(&fi);
742 length = ngx_file_size(&fi);
743 }
744 }
745
746 size = (length + cache->bsize - 1) / cache->bsize;
747
748 ngx_shmtx_lock(&cache->shpool->mutex);
749
750 c->node->count--;
751 c->node->uniq = uniq;
752 c->node->body_start = c->body_start;
753
754 size = size - (c->node->length + cache->bsize - 1) / cache->bsize;
755
756 c->node->length = length;
757
758 cache->sh->size += size;
759
760 if (rc == NGX_OK) {
761 c->node->exists = 1;
762 }
763
764 c->node->updating = 0;
765
766 ngx_shmtx_unlock(&cache->shpool->mutex);
767 }
768
769
770 ngx_int_t
771 ngx_http_cache_send(ngx_http_request_t *r)
772 {
773 off_t size;
774 ngx_int_t rc;
775 ngx_buf_t *b;
776 ngx_chain_t out;
777 ngx_http_cache_t *c;
778
779 c = r->cache;
780
781 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
782 "http file cache send: %s", c->file.name.data);
783
784 /* we need to allocate all before the header would be sent */
785
786 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
787 if (b == NULL) {
788 return NGX_HTTP_INTERNAL_SERVER_ERROR;
789 }
790
791 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
792 if (b->file == NULL) {
793 return NGX_HTTP_INTERNAL_SERVER_ERROR;
794 }
795
796 rc = ngx_http_send_header(r);
797
798 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
799 return rc;
800 }
801
802 size = c->length - c->body_start;
803 if (size == 0) {
804 return rc;
805 }
806
807 b->file_pos = c->body_start;
808 b->file_last = c->length;
809
810 b->in_file = size ? 1: 0;
811 b->last_buf = (r == r->main) ? 1: 0;
812 b->last_in_chain = 1;
813
814 b->file->fd = c->file.fd;
815 b->file->name = c->file.name;
816 b->file->log = r->connection->log;
817
818 out.buf = b;
819 out.next = NULL;
820
821 return ngx_http_output_filter(r, &out);
822 }
823
824
825 void
826 ngx_http_file_cache_free(ngx_http_request_t *r, ngx_temp_file_t *tf)
827 {
828 ngx_http_cache_t *c;
829 ngx_http_file_cache_t *cache;
830
831 c = r->cache;
832
833 if (c->updated) {
834 return;
835 }
836
837 c->updated = 1;
838
839 cache = c->file_cache;
840
841 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
842 "http file cache free");
843
844 ngx_shmtx_lock(&cache->shpool->mutex);
845
846 c->node->count--;
847
848 if (c->error) {
849 c->node->valid_sec = c->valid_sec;
850 c->node->valid_msec = c->valid_msec;
851 c->node->error = c->error;
852 }
853
854 c->node->updating = 0;
855
856 ngx_shmtx_unlock(&cache->shpool->mutex);
857
858 if (c->temp_file) {
859 if (tf && tf->file.fd != NGX_INVALID_FILE) {
860 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
861 "http file cache incomplete: \"%s\"",
862 tf->file.name.data);
863
864 if (ngx_delete_file(tf->file.name.data) == NGX_FILE_ERROR) {
865 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
866 ngx_delete_file_n " \"%s\" failed",
867 tf->file.name.data);
868 }
869 }
870 }
871 }
872
873
874 static void
875 ngx_http_file_cache_cleanup(void *data)
876 {
877 ngx_http_cache_t *c = data;
878
879 ngx_http_file_cache_t *cache;
880
881 if (c->updated) {
882 return;
883 }
884
885 c->updated = 1;
886
887 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->file.log, 0,
888 "http file cache cleanup");
889
890 if (c->error) {
891 return;
892 }
893
894 cache = c->file_cache;
895
896 ngx_shmtx_lock(&cache->shpool->mutex);
897
898 c->node->count--;
899
900 ngx_shmtx_unlock(&cache->shpool->mutex);
901 }
902
903
904 static time_t
905 ngx_http_file_cache_forced_expire(ngx_http_file_cache_t *cache)
906 {
907 u_char *name;
908 size_t len;
909 time_t wait;
910 ngx_uint_t tries;
911 ngx_path_t *path;
912 ngx_queue_t *q;
913 ngx_http_file_cache_node_t *fcn;
914
915 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
916 "http file cache forced expire");
917
918 path = cache->path;
919 len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
920
921 name = ngx_alloc(len + 1, ngx_cycle->log);
922 if (name == NULL) {
923 return 10;
924 }
925
926 ngx_memcpy(name, path->name.data, path->name.len);
927
928 wait = 10;
929 tries = 0;
930
931 ngx_shmtx_lock(&cache->shpool->mutex);
932
933 for (q = ngx_queue_last(&cache->sh->queue);
934 q != ngx_queue_sentinel(&cache->sh->queue);
935 q = ngx_queue_prev(q))
936 {
937 fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
938
939 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
940 "http file cache forced expire: #%d %d %02xd%02xd%02xd%02xd",
941 fcn->count, fcn->exists,
942 fcn->key[0], fcn->key[1], fcn->key[2], fcn->key[3]);
943
944 if (fcn->count) {
945
946 if (tries++ < 20) {
947 continue;
948 }
949
950 wait = 1;
951
952 break;
953 }
954
955 if (!fcn->exists) {
956
957 ngx_queue_remove(q);
958 ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
959 ngx_slab_free_locked(cache->shpool, fcn);
960
961 break;
962 }
963
964 ngx_http_file_cache_delete(cache, q, name);
965
966 break;
967 }
968
969 ngx_shmtx_unlock(&cache->shpool->mutex);
970
971 ngx_free(name);
972
973 return wait;
974 }
975
976
977 static time_t
978 ngx_http_file_cache_expire(ngx_http_file_cache_t *cache)
979 {
980 u_char *name, *p;
981 size_t len;
982 time_t now, wait;
983 ngx_path_t *path;
984 ngx_queue_t *q;
985 ngx_http_file_cache_node_t *fcn;
986 u_char key[2 * NGX_HTTP_CACHE_KEY_LEN];
987
988 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
989 "http file cache expire");
990
991 path = cache->path;
992 len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
993
994 name = ngx_alloc(len + 1, ngx_cycle->log);
995 if (name == NULL) {
996 return 10;
997 }
998
999 ngx_memcpy(name, path->name.data, path->name.len);
1000
1001 now = ngx_time();
1002
1003 ngx_shmtx_lock(&cache->shpool->mutex);
1004
1005 for ( ;; ) {
1006
1007 if (ngx_queue_empty(&cache->sh->queue)) {
1008 wait = 10;
1009 break;
1010 }
1011
1012 q = ngx_queue_last(&cache->sh->queue);
1013
1014 fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
1015
1016 wait = fcn->expire - now;
1017
1018 if (wait > 0) {
1019 wait = wait > 10 ? 10 : wait;
1020 break;
1021 }
1022
1023 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
1024 "http file cache expire: #%d %d %02xd%02xd%02xd%02xd",
1025 fcn->count, fcn->exists,
1026 fcn->key[0], fcn->key[1], fcn->key[2], fcn->key[3]);
1027
1028 if (fcn->count) {
1029
1030 p = ngx_hex_dump(key, (u_char *) &fcn->node.key,
1031 sizeof(ngx_rbtree_key_t));
1032
1033 len = NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t);
1034 (void) ngx_hex_dump(p, fcn->key, len);
1035
1036 /*
1037 * abnormally exited workers may leave locked cache entries,
1038 * and although it may be safe to remove them completely,
1039 * we prefer to remove them from inactive queue and rbtree
1040 * only, and to allow other leaks
1041 */
1042
1043 ngx_queue_remove(q);
1044 ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
1045
1046 ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
1047 "ignore long locked inactive cache entry %*s, count:%d",
1048 2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count);
1049
1050 continue;
1051 }
1052
1053 if (!fcn->exists) {
1054
1055 ngx_queue_remove(q);
1056 ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
1057 ngx_slab_free_locked(cache->shpool, fcn);
1058
1059 continue;
1060 }
1061
1062 ngx_http_file_cache_delete(cache, q, name);
1063 }
1064
1065 ngx_shmtx_unlock(&cache->shpool->mutex);
1066
1067 ngx_free(name);
1068
1069 return wait;
1070 }
1071
1072
1073 static void
1074 ngx_http_file_cache_delete(ngx_http_file_cache_t *cache, ngx_queue_t *q,
1075 u_char *name)
1076 {
1077 u_char *p;
1078 size_t len;
1079 ngx_path_t *path;
1080 ngx_http_file_cache_node_t *fcn;
1081
1082 fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
1083
1084 cache->sh->size -= (fcn->length + cache->bsize - 1) / cache->bsize;
1085
1086 path = cache->path;
1087
1088 p = name + path->name.len + 1 + path->len;
1089
1090 p = ngx_hex_dump(p, (u_char *) &fcn->node.key, sizeof(ngx_rbtree_key_t));
1091
1092 len = NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t);
1093 p = ngx_hex_dump(p, fcn->key, len);
1094 *p = '\0';
1095
1096 ngx_queue_remove(q);
1097
1098 ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
1099
1100 ngx_slab_free_locked(cache->shpool, fcn);
1101
1102 ngx_shmtx_unlock(&cache->shpool->mutex);
1103
1104 len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
1105
1106 ngx_create_hashed_filename(path, name, len);
1107
1108 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
1109 "http file cache expire: \"%s\"", name);
1110
1111 if (ngx_delete_file(name) == NGX_FILE_ERROR) {
1112 ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, ngx_errno,
1113 ngx_delete_file_n " \"%s\" failed", name);
1114 }
1115
1116 ngx_shmtx_lock(&cache->shpool->mutex);
1117 }
1118
1119
1120 static time_t
1121 ngx_http_file_cache_manager(void *data)
1122 {
1123 ngx_http_file_cache_t *cache = data;
1124
1125 off_t size;
1126 time_t next;
1127
1128 next = ngx_http_file_cache_expire(cache);
1129
1130 cache->last = ngx_current_msec;
1131 cache->files = 0;
1132
1133 for ( ;; ) {
1134 ngx_shmtx_lock(&cache->shpool->mutex);
1135
1136 size = cache->sh->size;
1137
1138 ngx_shmtx_unlock(&cache->shpool->mutex);
1139
1140 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
1141 "http file cache size: %O", size);
1142
1143 if (size < cache->max_size) {
1144 return next;
1145 }
1146
1147 next = ngx_http_file_cache_forced_expire(cache);
1148
1149 if (ngx_http_file_cache_manager_sleep(cache) != NGX_OK) {
1150 return next;
1151 }
1152 }
1153 }
1154
1155
1156 static void
1157 ngx_http_file_cache_loader(void *data)
1158 {
1159 ngx_http_file_cache_t *cache = data;
1160
1161 ngx_tree_ctx_t tree;
1162
1163 if (!cache->sh->cold || cache->sh->loading) {
1164 return;
1165 }
1166
1167 if (!ngx_atomic_cmp_set(&cache->sh->loading, 0, ngx_pid)) {
1168 return;
1169 }
1170
1171 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
1172 "http file cache loader");
1173
1174 tree.init_handler = NULL;
1175 tree.file_handler = ngx_http_file_cache_manage_file;
1176 tree.pre_tree_handler = ngx_http_file_cache_noop;
1177 tree.post_tree_handler = ngx_http_file_cache_noop;
1178 tree.spec_handler = ngx_http_file_cache_delete_file;
1179 tree.data = cache;
1180 tree.alloc = 0;
1181 tree.log = ngx_cycle->log;
1182
1183 cache->last = ngx_current_msec;
1184 cache->files = 0;
1185
1186 if (ngx_walk_tree(&tree, &cache->path->name) == NGX_ABORT) {
1187 cache->sh->loading = 0;
1188 return;
1189 }
1190
1191 cache->sh->cold = 0;
1192 cache->sh->loading = 0;
1193
1194 ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0,
1195 "http file cache: %V %.3fM, bsize: %uz",
1196 &cache->path->name,
1197 ((double) cache->sh->size * cache->bsize) / (1024 * 1024),
1198 cache->bsize);
1199 }
1200
1201
1202 static ngx_int_t
1203 ngx_http_file_cache_manager_sleep(ngx_http_file_cache_t *cache)
1204 {
1205 ngx_msec_t elapsed;
1206
1207 if (cache->files++ > 100) {
1208
1209 ngx_time_update(0, 0);
1210
1211 elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last));
1212
1213 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
1214 "http file cache manager time: %M", elapsed);
1215
1216 if (elapsed > 200) {
1217
1218 /*
1219 * if processing 100 files takes more than 200ms,
1220 * it seems that many operations require disk i/o,
1221 * therefore sleep 200ms
1222 */
1223
1224 ngx_msleep(200);
1225
1226 ngx_time_update(0, 0);
1227 }
1228
1229 cache->last = ngx_current_msec;
1230 cache->files = 0;
1231 }
1232
1233 return (ngx_quit || ngx_terminate) ? NGX_ABORT : NGX_OK;
1234 }
1235
1236
1237 static ngx_int_t
1238 ngx_http_file_cache_noop(ngx_tree_ctx_t *ctx, ngx_str_t *path)
1239 {
1240 return NGX_OK;
1241 }
1242
1243
1244 static ngx_int_t
1245 ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
1246 {
1247 ngx_http_file_cache_t *cache;
1248
1249 cache = ctx->data;
1250
1251 if (ngx_http_file_cache_add_file(ctx, path) != NGX_OK) {
1252 (void) ngx_http_file_cache_delete_file(ctx, path);
1253 }
1254
1255 return ngx_http_file_cache_manager_sleep(cache);
1256 }
1257
1258
1259 static ngx_int_t
1260 ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
1261 {
1262 u_char *p;
1263 ngx_fd_t fd;
1264 ngx_int_t n;
1265 ngx_uint_t i;
1266 ngx_file_info_t fi;
1267 ngx_http_cache_t c;
1268 ngx_http_file_cache_t *cache;
1269 ngx_http_file_cache_header_t h;
1270
1271 if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
1272 return NGX_ERROR;
1273 }
1274
1275 ngx_memzero(&c, sizeof(ngx_http_cache_t));
1276
1277 fd = ngx_open_file(name->data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0);
1278
1279 if (fd == NGX_INVALID_FILE) {
1280 ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
1281 ngx_open_file_n " \"%s\" failed", name->data);
1282 return NGX_ERROR;
1283 }
1284
1285 c.file.fd = fd;
1286 c.file.name = *name;
1287 c.file.log = ctx->log;
1288
1289 n = ngx_read_file(&c.file, (u_char *) &h,
1290 sizeof(ngx_http_file_cache_header_t), 0);
1291 if (n == NGX_ERROR) {
1292 return NGX_ERROR;
1293 }
1294
1295 if ((size_t) n < sizeof(ngx_http_file_cache_header_t)) {
1296 ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
1297 "cache file \"%s\" is too small", name->data);
1298 return NGX_ERROR;
1299 }
1300
1301 if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) {
1302 ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
1303 ngx_fd_info_n " \"%s\" failed", name->data);
1304
1305 } else {
1306 c.uniq = ngx_file_uniq(&fi);
1307 c.valid_sec = h.valid_sec;
1308 c.valid_msec = h.valid_msec;
1309 c.body_start = h.body_start;
1310 c.length = ngx_file_size(&fi);
1311 }
1312
1313 if (ngx_close_file(fd) == NGX_FILE_ERROR) {
1314 ngx_log_error(NGX_LOG_ALERT, ctx->log, ngx_errno,
1315 ngx_close_file_n " \"%s\" failed", name->data);
1316 }
1317
1318 if (c.body_start == 0) {
1319 return NGX_ERROR;
1320 }
1321
1322 p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];
1323
1324 for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
1325 n = ngx_hextoi(p, 2);
1326
1327 if (n == NGX_ERROR) {
1328 return NGX_ERROR;
1329 }
1330
1331 p += 2;
1332
1333 c.key[i] = (u_char) n;
1334 }
1335
1336 cache = ctx->data;
1337
1338 return ngx_http_file_cache_add(cache, &c);
1339 }
1340
1341
1342 static ngx_int_t
1343 ngx_http_file_cache_add(ngx_http_file_cache_t *cache, ngx_http_cache_t *c)
1344 {
1345 ngx_http_file_cache_node_t *fcn;
1346
1347 ngx_shmtx_lock(&cache->shpool->mutex);
1348
1349 fcn = ngx_http_file_cache_lookup(cache, c->key);
1350
1351 if (fcn == NULL) {
1352
1353 fcn = ngx_slab_alloc_locked(cache->shpool,
1354 sizeof(ngx_http_file_cache_node_t));
1355 if (fcn == NULL) {
1356 ngx_shmtx_unlock(&cache->shpool->mutex);
1357 return NGX_ERROR;
1358 }
1359
1360 ngx_memcpy((u_char *) &fcn->node.key, c->key, sizeof(ngx_rbtree_key_t));
1361
1362 ngx_memcpy(fcn->key, &c->key[sizeof(ngx_rbtree_key_t)],
1363 NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
1364
1365 ngx_rbtree_insert(&cache->sh->rbtree, &fcn->node);
1366
1367 fcn->uses = 1;
1368 fcn->count = 0;
1369 fcn->valid_msec = c->valid_msec;
1370 fcn->error = 0;
1371 fcn->exists = 1;
1372 fcn->uniq = c->uniq;
1373 fcn->valid_sec = c->valid_sec;
1374 fcn->body_start = c->body_start;
1375 fcn->length = c->length;
1376
1377 cache->sh->size += (c->length + cache->bsize - 1) / cache->bsize;
1378
1379 } else {
1380 ngx_queue_remove(&fcn->queue);
1381 }
1382
1383 fcn->expire = ngx_time() + cache->inactive;
1384
1385 ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
1386
1387 ngx_shmtx_unlock(&cache->shpool->mutex);
1388
1389 return NGX_OK;
1390 }
1391
1392
1393 static ngx_int_t
1394 ngx_http_file_cache_delete_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
1395 {
1396 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
1397 "http file cache delete: \"%s\"", path->data);
1398
1399 if (ngx_delete_file(path->data) == NGX_FILE_ERROR) {
1400 ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
1401 ngx_delete_file_n " \"%s\" failed", path->data);
1402 }
1403
1404 return NGX_OK;
1405 }
1406
1407
1408 time_t
1409 ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status)
1410 {
1411 ngx_uint_t i;
1412 ngx_http_cache_valid_t *valid;
1413
1414 if (cache_valid == NULL) {
1415 return 0;
1416 }
1417
1418 valid = cache_valid->elts;
1419 for (i = 0; i < cache_valid->nelts; i++) {
1420
1421 if (valid[i].status == 0) {
1422 return valid[i].valid;
1423 }
1424
1425 if (valid[i].status == status) {
1426 return valid[i].valid;
1427 }
1428 }
1429
1430 return 0;
1431 }
1432
1433
1434 char *
1435 ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
1436 {
1437 off_t max_size;
1438 u_char *last, *p;
1439 time_t inactive;
1440 ssize_t size;
1441 ngx_str_t s, name, *value;
1442 ngx_uint_t i, n;
1443 ngx_http_file_cache_t *cache;
1444
1445 cache = ngx_pcalloc(cf->pool, sizeof(ngx_http_file_cache_t));
1446 if (cache == NULL) {
1447 return NGX_CONF_ERROR;
1448 }
1449
1450 cache->path = ngx_pcalloc(cf->pool, sizeof(ngx_path_t));
1451 if (cache->path == NULL) {
1452 return NGX_CONF_ERROR;
1453 }
1454
1455 inactive = 600;
1456
1457 name.len = 0;
1458 size = 0;
1459 max_size = NGX_MAX_OFF_T_VALUE;
1460
1461 value = cf->args->elts;
1462
1463 cache->path->name = value[1];
1464
1465 if (cache->path->name.data[cache->path->name.len - 1] == '/') {
1466 cache->path->name.len--;
1467 }
1468
1469 if (ngx_conf_full_name(cf->cycle, &cache->path->name, 0) != NGX_OK) {
1470 return NGX_CONF_ERROR;
1471 }
1472
1473 for (i = 2; i < cf->args->nelts; i++) {
1474
1475 if (ngx_strncmp(value[i].data, "levels=", 7) == 0) {
1476
1477 p = value[i].data + 7;
1478 last = value[i].data + value[i].len;
1479
1480 for (n = 0; n < 3 && p < last; n++) {
1481
1482 if (*p > '' && *p < '3') {
1483
1484 cache->path->level[n] = *p++ - '';
1485 cache->path->len += cache->path->level[n] + 1;
1486
1487 if (p == last) {
1488 break;
1489 }
1490
1491 if (*p++ == ':' && n < 2 && p != last) {
1492 continue;
1493 }
1494
1495 goto invalid_levels;
1496 }
1497
1498 goto invalid_levels;
1499 }
1500
1501 if (cache->path->len < 10 + 3) {
1502 continue;
1503 }
1504
1505 invalid_levels:
1506
1507 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1508 "invalid \"levels\" \"%V\"", &value[i]);
1509 return NGX_CONF_ERROR;
1510 }
1511
1512 if (ngx_strncmp(value[i].data, "keys_zone=", 10) == 0) {
1513
1514 name.data = value[i].data + 10;
1515
1516 p = (u_char *) ngx_strchr(name.data, ':');
1517
1518 if (p) {
1519 *p = '\0';
1520
1521 name.len = p - name.data;
1522
1523 p++;
1524
1525 s.len = value[i].data + value[i].len - p;
1526 s.data = p;
1527
1528 size = ngx_parse_size(&s);
1529 if (size > 8191) {
1530 continue;
1531 }
1532 }
1533
1534 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1535 "invalid keys zone size \"%V\"", &value[i]);
1536 return NGX_CONF_ERROR;
1537 }
1538
1539 if (ngx_strncmp(value[i].data, "inactive=", 9) == 0) {
1540
1541 s.len = value[i].len - 9;
1542 s.data = value[i].data + 9;
1543
1544 inactive = ngx_parse_time(&s, 1);
1545 if (inactive < 0) {
1546 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1547 "invalid inactive value \"%V\"", &value[i]);
1548 return NGX_CONF_ERROR;
1549 }
1550
1551 continue;
1552 }
1553
1554 if (ngx_strncmp(value[i].data, "max_size=", 9) == 0) {
1555
1556 s.len = value[i].len - 9;
1557 s.data = value[i].data + 9;
1558
1559 max_size = ngx_parse_offset(&s);
1560 if (max_size < 0) {
1561 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1562 "invalid max_size value \"%V\"", &value[i]);
1563 return NGX_CONF_ERROR;
1564 }
1565
1566 continue;
1567 }
1568
1569 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1570 "invalid parameter \"%V\"", &value[i]);
1571 return NGX_CONF_ERROR;
1572 }
1573
1574 if (name.len == 0 || size == 0) {
1575 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1576 "\"%V\" must have \"keys_zone\" parameter",
1577 &cmd->name);
1578 return NGX_CONF_ERROR;
1579 }
1580
1581 cache->path->manager = ngx_http_file_cache_manager;
1582 cache->path->loader = ngx_http_file_cache_loader;
1583 cache->path->data = cache;
1584
1585 if (ngx_add_path(cf, &cache->path) != NGX_OK) {
1586 return NGX_CONF_ERROR;
1587 }
1588
1589 cache->shm_zone = ngx_shared_memory_add(cf, &name, size, cmd->post);
1590 if (cache->shm_zone == NULL) {
1591 return NGX_CONF_ERROR;
1592 }
1593
1594 if (cache->shm_zone->data) {
1595 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1596 "duplicate zone \"%V\"", &name);
1597 return NGX_CONF_ERROR;
1598 }
1599
1600
1601 cache->shm_zone->init = ngx_http_file_cache_init;
1602 cache->shm_zone->data = cache;
1603
1604 cache->inactive = inactive;
1605 cache->max_size = max_size;
1606
1607 return NGX_CONF_OK;
1608 }
1609
1610
1611 char *
1612 ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
1613 void *conf)
1614 {
1615 char *p = conf;
1616
1617 time_t valid;
1618 ngx_str_t *value;
1619 ngx_uint_t i, n, status;
1620 ngx_array_t **a;
1621 ngx_http_cache_valid_t *v;
1622 static ngx_uint_t statuses[] = { 200, 301, 302 };
1623
1624 a = (ngx_array_t **) (p + cmd->offset);
1625
1626 if (*a == NGX_CONF_UNSET_PTR) {
1627 *a = ngx_array_create(cf->pool, 1, sizeof(ngx_http_cache_valid_t));
1628 if (*a == NULL) {
1629 return NGX_CONF_ERROR;
1630 }
1631 }
1632
1633 value = cf->args->elts;
1634 n = cf->args->nelts - 1;
1635
1636 valid = ngx_parse_time(&value[n], 1);
1637 if (valid < 0) {
1638 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1639 "invalid time value \"%V\"", &value[n]);
1640 return NGX_CONF_ERROR;
1641 }
1642
1643 if (n == 1) {
1644
1645 for (i = 0; i < 3; i++) {
1646 v = ngx_array_push(*a);
1647 if (v == NULL) {
1648 return NGX_CONF_ERROR;
1649 }
1650
1651 v->status = statuses[i];
1652 v->valid = valid;
1653 }
1654
1655 return NGX_CONF_OK;
1656 }
1657
1658 for (i = 1; i < n; i++) {
1659
1660 if (ngx_strcmp(value[i].data, "any") == 0) {
1661
1662 status = 0;
1663
1664 } else {
1665
1666 status = ngx_atoi(value[i].data, value[i].len);
1667 if (status < 100) {
1668 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
1669 "invalid status \"%V\"", &value[i]);
1670 return NGX_CONF_ERROR;
1671 }
1672 }
1673
1674 v = ngx_array_push(*a);
1675 if (v == NULL) {
1676 return NGX_CONF_ERROR;
1677 }
1678
1679 v->status = status;
1680 v->valid = valid;
1681 }
1682
1683 return NGX_CONF_OK;
1684 }
1685
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