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  src/http/ngx_http_file_cache.c - nginx-1.7.10
 Global variables defined
 
 Functions defined
 
 Source code
  
 
 
 
- #include <ngx_config.h>
 
- #include <ngx_core.h>
 
- #include <ngx_http.h>
 
- #include <ngx_md5.h>
 
 
 
- static ngx_int_t ngx_http_file_cache_lock(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- static void ngx_http_file_cache_lock_wait_handler(ngx_event_t *ev);
 
- static void ngx_http_file_cache_lock_wait(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- static ngx_int_t ngx_http_file_cache_read(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- static ssize_t ngx_http_file_cache_aio_read(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- #if (NGX_HAVE_FILE_AIO)
 
- static void ngx_http_cache_aio_event_handler(ngx_event_t *ev);
 
- #endif
 
- static ngx_int_t ngx_http_file_cache_exists(ngx_http_file_cache_t *cache,
 
-     ngx_http_cache_t *c);
 
- static ngx_int_t ngx_http_file_cache_name(ngx_http_request_t *r,
 
-     ngx_path_t *path);
 
- static ngx_http_file_cache_node_t *
 
-     ngx_http_file_cache_lookup(ngx_http_file_cache_t *cache, u_char *key);
 
- static void ngx_http_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
 
-     ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel);
 
- static void ngx_http_file_cache_vary(ngx_http_request_t *r, u_char *vary,
 
-     size_t len, u_char *hash);
 
- static void ngx_http_file_cache_vary_header(ngx_http_request_t *r,
 
-     ngx_md5_t *md5, ngx_str_t *name);
 
- static ngx_int_t ngx_http_file_cache_reopen(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- static ngx_int_t ngx_http_file_cache_update_variant(ngx_http_request_t *r,
 
-     ngx_http_cache_t *c);
 
- static void ngx_http_file_cache_cleanup(void *data);
 
- static time_t ngx_http_file_cache_forced_expire(ngx_http_file_cache_t *cache);
 
- static time_t ngx_http_file_cache_expire(ngx_http_file_cache_t *cache);
 
- static void ngx_http_file_cache_delete(ngx_http_file_cache_t *cache,
 
-     ngx_queue_t *q, u_char *name);
 
- static void ngx_http_file_cache_loader_sleep(ngx_http_file_cache_t *cache);
 
- static ngx_int_t ngx_http_file_cache_noop(ngx_tree_ctx_t *ctx,
 
-     ngx_str_t *path);
 
- static ngx_int_t ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx,
 
-     ngx_str_t *path);
 
- static ngx_int_t ngx_http_file_cache_manage_directory(ngx_tree_ctx_t *ctx,
 
-     ngx_str_t *path);
 
- static ngx_int_t ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx,
 
-     ngx_str_t *path);
 
- static ngx_int_t ngx_http_file_cache_add(ngx_http_file_cache_t *cache,
 
-     ngx_http_cache_t *c);
 
- static ngx_int_t ngx_http_file_cache_delete_file(ngx_tree_ctx_t *ctx,
 
-     ngx_str_t *path);
 
 
 
- ngx_str_t  ngx_http_cache_status[] = {
 
-     ngx_string("MISS"),
 
-     ngx_string("BYPASS"),
 
-     ngx_string("EXPIRED"),
 
-     ngx_string("STALE"),
 
-     ngx_string("UPDATING"),
 
-     ngx_string("REVALIDATED"),
 
-     ngx_string("HIT")
 
- };
 
 
 
- static u_char  ngx_http_file_cache_key[] = { LF, 'K', 'E', 'Y', ':', ' ' };
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_init(ngx_shm_zone_t *shm_zone, void *data)
 
- {
 
-     ngx_http_file_cache_t  *ocache = data;
 
 
-     size_t                  len;
 
-     ngx_uint_t              n;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     cache = shm_zone->data;
 
 
-     if (ocache) {
 
-         if (ngx_strcmp(cache->path->name.data, ocache->path->name.data) != 0) {
 
-             ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
 
-                           "cache \"%V\" uses the \"%V\" cache path "
 
-                           "while previously it used the \"%V\" cache path",
 
-                           &shm_zone->shm.name, &cache->path->name,
 
-                           &ocache->path->name);
 
 
-             return NGX_ERROR;
 
-         }
 
 
-         for (n = 0; n < 3; n++) {
 
-             if (cache->path->level[n] != ocache->path->level[n]) {
 
-                 ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
 
-                               "cache \"%V\" had previously different levels",
 
-                               &shm_zone->shm.name);
 
-                 return NGX_ERROR;
 
-             }
 
-         }
 
 
-         cache->sh = ocache->sh;
 
 
-         cache->shpool = ocache->shpool;
 
-         cache->bsize = ocache->bsize;
 
 
-         cache->max_size /= cache->bsize;
 
 
-         if (!cache->sh->cold || cache->sh->loading) {
 
-             cache->path->loader = NULL;
 
-         }
 
 
-         return NGX_OK;
 
-     }
 
 
-     cache->shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
 
 
-     if (shm_zone->shm.exists) {
 
-         cache->sh = cache->shpool->data;
 
-         cache->bsize = ngx_fs_bsize(cache->path->name.data);
 
 
-         return NGX_OK;
 
-     }
 
 
-     cache->sh = ngx_slab_alloc(cache->shpool, sizeof(ngx_http_file_cache_sh_t));
 
-     if (cache->sh == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     cache->shpool->data = cache->sh;
 
 
-     ngx_rbtree_init(&cache->sh->rbtree, &cache->sh->sentinel,
 
-                     ngx_http_file_cache_rbtree_insert_value);
 
 
-     ngx_queue_init(&cache->sh->queue);
 
 
-     cache->sh->cold = 1;
 
-     cache->sh->loading = 0;
 
-     cache->sh->size = 0;
 
 
-     cache->bsize = ngx_fs_bsize(cache->path->name.data);
 
 
-     cache->max_size /= cache->bsize;
 
 
-     len = sizeof(" in cache keys zone \"\"") + shm_zone->shm.name.len;
 
 
-     cache->shpool->log_ctx = ngx_slab_alloc(cache->shpool, len);
 
-     if (cache->shpool->log_ctx == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     ngx_sprintf(cache->shpool->log_ctx, " in cache keys zone \"%V\"%Z",
 
-                 &shm_zone->shm.name);
 
 
-     cache->shpool->log_nomem = 0;
 
 
-     return NGX_OK;
 
- }
 
 
 
- ngx_int_t
 
- ngx_http_file_cache_new(ngx_http_request_t *r)
 
- {
 
-     ngx_http_cache_t  *c;
 
 
-     c = ngx_pcalloc(r->pool, sizeof(ngx_http_cache_t));
 
-     if (c == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     if (ngx_array_init(&c->keys, r->pool, 4, sizeof(ngx_str_t)) != NGX_OK) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     r->cache = c;
 
-     c->file.log = r->connection->log;
 
-     c->file.fd = NGX_INVALID_FILE;
 
 
-     c->last_modified = -1;
 
 
-     return NGX_OK;
 
- }
 
 
 
- ngx_int_t
 
- ngx_http_file_cache_create(ngx_http_request_t *r)
 
- {
 
-     ngx_http_cache_t       *c;
 
-     ngx_pool_cleanup_t     *cln;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     c = r->cache;
 
-     cache = c->file_cache;
 
 
-     cln = ngx_pool_cleanup_add(r->pool, 0);
 
-     if (cln == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     cln->handler = ngx_http_file_cache_cleanup;
 
-     cln->data = c;
 
 
-     if (ngx_http_file_cache_exists(cache, c) == NGX_ERROR) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     if (ngx_http_file_cache_name(r, cache->path) != NGX_OK) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     return NGX_OK;
 
- }
 
 
 
- void
 
- ngx_http_file_cache_create_key(ngx_http_request_t *r)
 
- {
 
-     size_t             len;
 
-     ngx_str_t         *key;
 
-     ngx_uint_t         i;
 
-     ngx_md5_t          md5;
 
-     ngx_http_cache_t  *c;
 
 
-     c = r->cache;
 
 
-     len = 0;
 
 
-     ngx_crc32_init(c->crc32);
 
-     ngx_md5_init(&md5);
 
 
-     key = c->keys.elts;
 
-     for (i = 0; i < c->keys.nelts; i++) {
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                        "http cache key: \"%V\"", &key[i]);
 
 
-         len += key[i].len;
 
 
-         ngx_crc32_update(&c->crc32, key[i].data, key[i].len);
 
-         ngx_md5_update(&md5, key[i].data, key[i].len);
 
-     }
 
 
-     c->header_start = sizeof(ngx_http_file_cache_header_t)
 
-                       + sizeof(ngx_http_file_cache_key) + len + 1;
 
 
-     ngx_crc32_final(c->crc32);
 
-     ngx_md5_final(c->key, &md5);
 
 
-     ngx_memcpy(c->main, c->key, NGX_HTTP_CACHE_KEY_LEN);
 
- }
 
 
 
- ngx_int_t
 
- ngx_http_file_cache_open(ngx_http_request_t *r)
 
- {
 
-     ngx_int_t                  rc, rv;
 
-     ngx_uint_t                 cold, test;
 
-     ngx_http_cache_t          *c;
 
-     ngx_pool_cleanup_t        *cln;
 
-     ngx_open_file_info_t       of;
 
-     ngx_http_file_cache_t     *cache;
 
-     ngx_http_core_loc_conf_t  *clcf;
 
 
-     c = r->cache;
 
 
-     if (c->waiting) {
 
-         return NGX_AGAIN;
 
-     }
 
 
-     if (c->reading) {
 
-         return ngx_http_file_cache_read(r, c);
 
-     }
 
 
-     cache = c->file_cache;
 
 
-     if (c->node == NULL) {
 
-         cln = ngx_pool_cleanup_add(r->pool, 0);
 
-         if (cln == NULL) {
 
-             return NGX_ERROR;
 
-         }
 
 
-         cln->handler = ngx_http_file_cache_cleanup;
 
-         cln->data = c;
 
-     }
 
 
-     rc = ngx_http_file_cache_exists(cache, c);
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache exists: %i e:%d", rc, c->exists);
 
 
-     if (rc == NGX_ERROR) {
 
-         return rc;
 
-     }
 
 
-     if (rc == NGX_AGAIN) {
 
-         return NGX_HTTP_CACHE_SCARCE;
 
-     }
 
 
-     cold = cache->sh->cold;
 
 
-     if (rc == NGX_OK) {
 
 
-         if (c->error) {
 
-             return c->error;
 
-         }
 
 
-         c->temp_file = 1;
 
-         test = c->exists ? 1 : 0;
 
-         rv = NGX_DECLINED;
 
 
-     } else { 
 
-         if (c->min_uses > 1) {
 
 
-             if (!cold) {
 
-                 return NGX_HTTP_CACHE_SCARCE;
 
-             }
 
 
-             test = 1;
 
-             rv = NGX_HTTP_CACHE_SCARCE;
 
 
-         } else {
 
-             c->temp_file = 1;
 
-             test = cold ? 1 : 0;
 
-             rv = NGX_DECLINED;
 
-         }
 
-     }
 
 
-     if (ngx_http_file_cache_name(r, cache->path) != NGX_OK) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     if (!test) {
 
-         goto done;
 
-     }
 
 
-     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
 
 
-     ngx_memzero(&of, sizeof(ngx_open_file_info_t));
 
 
-     of.uniq = c->uniq;
 
-     of.valid = clcf->open_file_cache_valid;
 
-     of.min_uses = clcf->open_file_cache_min_uses;
 
-     of.events = clcf->open_file_cache_events;
 
-     of.directio = NGX_OPEN_FILE_DIRECTIO_OFF;
 
-     of.read_ahead = clcf->read_ahead;
 
 
-     if (ngx_open_cached_file(clcf->open_file_cache, &c->file.name, &of, r->pool)
 
-         != NGX_OK)
 
-     {
 
-         switch (of.err) {
 
 
-         case 0:
 
-             return NGX_ERROR;
 
 
-         case NGX_ENOENT:
 
-         case NGX_ENOTDIR:
 
-             goto done;
 
 
-         default:
 
-             ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
 
-                           ngx_open_file_n " \"%s\" failed", c->file.name.data);
 
-             return NGX_ERROR;
 
-         }
 
-     }
 
 
-     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache fd: %d", of.fd);
 
 
-     c->file.fd = of.fd;
 
-     c->file.log = r->connection->log;
 
-     c->uniq = of.uniq;
 
-     c->length = of.size;
 
-     c->fs_size = (of.fs_size + cache->bsize - 1) / cache->bsize;
 
 
-     c->buf = ngx_create_temp_buf(r->pool, c->body_start);
 
-     if (c->buf == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     return ngx_http_file_cache_read(r, c);
 
 
- done:
 
 
-     if (rv == NGX_DECLINED) {
 
-         return ngx_http_file_cache_lock(r, c);
 
-     }
 
 
-     return rv;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_lock(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
-     ngx_msec_t                 now, timer;
 
-     ngx_http_file_cache_t     *cache;
 
 
-     if (!c->lock) {
 
-         return NGX_DECLINED;
 
-     }
 
 
-     now = ngx_current_msec;
 
 
-     cache = c->file_cache;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     timer = c->node->lock_time - now;
 
 
-     if (!c->node->updating || (ngx_msec_int_t) timer <= 0) {
 
-         c->node->updating = 1;
 
-         c->node->lock_time = now + c->lock_age;
 
-         c->updating = 1;
 
-         c->lock_time = c->node->lock_time;
 
-     }
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache lock u:%d wt:%M",
 
-                    c->updating, c->wait_time);
 
 
-     if (c->updating) {
 
-         return NGX_DECLINED;
 
-     }
 
 
-     if (c->lock_timeout == 0) {
 
-         return NGX_HTTP_CACHE_SCARCE;
 
-     }
 
 
-     c->waiting = 1;
 
 
-     if (c->wait_time == 0) {
 
-         c->wait_time = now + c->lock_timeout;
 
 
-         c->wait_event.handler = ngx_http_file_cache_lock_wait_handler;
 
-         c->wait_event.data = r;
 
-         c->wait_event.log = r->connection->log;
 
-     }
 
 
-     timer = c->wait_time - now;
 
 
-     ngx_add_timer(&c->wait_event, (timer > 500) ? 500 : timer);
 
 
-     r->main->blocked++;
 
 
-     return NGX_AGAIN;
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_lock_wait_handler(ngx_event_t *ev)
 
- {
 
-     ngx_connection_t    *c;
 
-     ngx_http_request_t  *r;
 
 
-     r = ev->data;
 
-     c = r->connection;
 
 
-     ngx_http_set_log_request(c->log, r);
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
 
-                    "http file cache wait: \"%V?%V\"", &r->uri, &r->args);
 
 
-     ngx_http_file_cache_lock_wait(r, r->cache);
 
 
-     ngx_http_run_posted_requests(c);
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_lock_wait(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
-     ngx_uint_t              wait;
 
-     ngx_msec_t              now, timer;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     now = ngx_current_msec;
 
 
-     timer = c->wait_time - now;
 
 
-     if ((ngx_msec_int_t) timer <= 0) {
 
-         ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
 
-                       "cache lock timeout");
 
-         c->lock_timeout = 0;
 
-         goto wakeup;
 
-     }
 
 
-     cache = c->file_cache;
 
-     wait = 0;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     timer = c->node->lock_time - now;
 
 
-     if (c->node->updating && (ngx_msec_int_t) timer > 0) {
 
-         wait = 1;
 
-     }
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     if (wait) {
 
-         ngx_add_timer(&c->wait_event, (timer > 500) ? 500 : timer);
 
-         return;
 
-     }
 
 
- wakeup:
 
 
-     c->waiting = 0;
 
-     r->main->blocked--;
 
-     r->write_event_handler(r);
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_read(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
-     time_t                         now;
 
-     ssize_t                        n;
 
-     ngx_int_t                      rc;
 
-     ngx_http_file_cache_t         *cache;
 
-     ngx_http_file_cache_header_t  *h;
 
 
-     n = ngx_http_file_cache_aio_read(r, c);
 
 
-     if (n < 0) {
 
-         return n;
 
-     }
 
 
-     if ((size_t) n < c->header_start) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       "cache file \"%s\" is too small", c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     h = (ngx_http_file_cache_header_t *) c->buf->pos;
 
 
-     if (h->version != NGX_HTTP_CACHE_VERSION) {
 
-         ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
 
-                       "cache file \"%s\" version mismatch", c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     if (h->crc32 != c->crc32) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       "cache file \"%s\" has md5 collision", c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     if ((size_t) h->body_start > c->body_start) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       "cache file \"%s\" has too long header",
 
-                       c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     if (h->vary_len > NGX_HTTP_CACHE_VARY_LEN) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       "cache file \"%s\" has incorrect vary length",
 
-                       c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     if (h->vary_len) {
 
-         ngx_http_file_cache_vary(r, h->vary, h->vary_len, c->variant);
 
 
-         if (ngx_memcmp(c->variant, h->variant, NGX_HTTP_CACHE_KEY_LEN) != 0) {
 
-             ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                            "http file cache vary mismatch");
 
-             return ngx_http_file_cache_reopen(r, c);
 
-         }
 
-     }
 
 
-     c->buf->last += n;
 
 
-     c->valid_sec = h->valid_sec;
 
-     c->last_modified = h->last_modified;
 
-     c->date = h->date;
 
-     c->valid_msec = h->valid_msec;
 
-     c->header_start = h->header_start;
 
-     c->body_start = h->body_start;
 
-     c->etag.len = h->etag_len;
 
-     c->etag.data = h->etag;
 
 
-     r->cached = 1;
 
 
-     cache = c->file_cache;
 
 
-     if (cache->sh->cold) {
 
 
-         ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-         if (!c->node->exists) {
 
-             c->node->uses = 1;
 
-             c->node->body_start = c->body_start;
 
-             c->node->exists = 1;
 
-             c->node->uniq = c->uniq;
 
-             c->node->fs_size = c->fs_size;
 
 
-             cache->sh->size += c->fs_size;
 
-         }
 
 
-         ngx_shmtx_unlock(&cache->shpool->mutex);
 
-     }
 
 
-     now = ngx_time();
 
 
-     if (c->valid_sec < now) {
 
 
-         ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-         if (c->node->updating) {
 
-             rc = NGX_HTTP_CACHE_UPDATING;
 
 
-         } else {
 
-             c->node->updating = 1;
 
-             c->updating = 1;
 
-             c->lock_time = c->node->lock_time;
 
-             rc = NGX_HTTP_CACHE_STALE;
 
-         }
 
 
-         ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-         ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                        "http file cache expired: %i %T %T",
 
-                        rc, c->valid_sec, now);
 
 
-         return rc;
 
-     }
 
 
-     return NGX_OK;
 
- }
 
 
 
- static ssize_t
 
- ngx_http_file_cache_aio_read(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
- #if (NGX_HAVE_FILE_AIO)
 
-     ssize_t                    n;
 
-     ngx_http_core_loc_conf_t  *clcf;
 
 
-     if (!ngx_file_aio) {
 
-         goto noaio;
 
-     }
 
 
-     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
 
 
-     if (!clcf->aio) {
 
-         goto noaio;
 
-     }
 
 
-     n = ngx_file_aio_read(&c->file, c->buf->pos, c->body_start, 0, r->pool);
 
 
-     if (n != NGX_AGAIN) {
 
-         c->reading = 0;
 
-         return n;
 
-     }
 
 
-     c->reading = 1;
 
 
-     c->file.aio->data = r;
 
-     c->file.aio->handler = ngx_http_cache_aio_event_handler;
 
 
-     r->main->blocked++;
 
-     r->aio = 1;
 
 
-     return NGX_AGAIN;
 
 
- noaio:
 
 
- #endif
 
 
-     return ngx_read_file(&c->file, c->buf->pos, c->body_start, 0);
 
- }
 
 
 
- #if (NGX_HAVE_FILE_AIO)
 
 
- static void
 
- ngx_http_cache_aio_event_handler(ngx_event_t *ev)
 
- {
 
-     ngx_event_aio_t     *aio;
 
-     ngx_connection_t    *c;
 
-     ngx_http_request_t  *r;
 
 
-     aio = ev->data;
 
-     r = aio->data;
 
-     c = r->connection;
 
 
-     ngx_http_set_log_request(c->log, r);
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
 
-                    "http file cache aio: \"%V?%V\"", &r->uri, &r->args);
 
 
-     r->main->blocked--;
 
-     r->aio = 0;
 
 
-     r->write_event_handler(r);
 
 
-     ngx_http_run_posted_requests(c);
 
- }
 
 
- #endif
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_exists(ngx_http_file_cache_t *cache, ngx_http_cache_t *c)
 
- {
 
-     ngx_int_t                    rc;
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     fcn = c->node;
 
 
-     if (fcn == NULL) {
 
-         fcn = ngx_http_file_cache_lookup(cache, c->key);
 
-     }
 
 
-     if (fcn) {
 
-         ngx_queue_remove(&fcn->queue);
 
 
-         if (c->node == NULL) {
 
-             fcn->uses++;
 
-             fcn->count++;
 
-         }
 
 
-         if (fcn->error) {
 
 
-             if (fcn->valid_sec < ngx_time()) {
 
-                 goto renew;
 
-             }
 
 
-             rc = NGX_OK;
 
 
-             goto done;
 
-         }
 
 
-         if (fcn->exists || fcn->uses >= c->min_uses) {
 
 
-             c->exists = fcn->exists;
 
-             if (fcn->body_start) {
 
-                 c->body_start = fcn->body_start;
 
-             }
 
 
-             rc = NGX_OK;
 
 
-             goto done;
 
-         }
 
 
-         rc = NGX_AGAIN;
 
 
-         goto done;
 
-     }
 
 
-     fcn = ngx_slab_calloc_locked(cache->shpool,
 
-                                  sizeof(ngx_http_file_cache_node_t));
 
-     if (fcn == NULL) {
 
-         ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-         (void) ngx_http_file_cache_forced_expire(cache);
 
 
-         ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-         fcn = ngx_slab_calloc_locked(cache->shpool,
 
-                                      sizeof(ngx_http_file_cache_node_t));
 
-         if (fcn == NULL) {
 
-             ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
 
-                           "could not allocate node%s", cache->shpool->log_ctx);
 
-             rc = NGX_ERROR;
 
-             goto failed;
 
-         }
 
-     }
 
 
-     ngx_memcpy((u_char *) &fcn->node.key, c->key, sizeof(ngx_rbtree_key_t));
 
 
-     ngx_memcpy(fcn->key, &c->key[sizeof(ngx_rbtree_key_t)],
 
-                NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
 
 
-     ngx_rbtree_insert(&cache->sh->rbtree, &fcn->node);
 
 
-     fcn->uses = 1;
 
-     fcn->count = 1;
 
 
- renew:
 
 
-     rc = NGX_DECLINED;
 
 
-     fcn->valid_msec = 0;
 
-     fcn->error = 0;
 
-     fcn->exists = 0;
 
-     fcn->valid_sec = 0;
 
-     fcn->uniq = 0;
 
-     fcn->body_start = 0;
 
-     fcn->fs_size = 0;
 
 
- done:
 
 
-     fcn->expire = ngx_time() + cache->inactive;
 
 
-     ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
 
 
-     c->uniq = fcn->uniq;
 
-     c->error = fcn->error;
 
-     c->node = fcn;
 
 
- failed:
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     return rc;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_name(ngx_http_request_t *r, ngx_path_t *path)
 
- {
 
-     u_char            *p;
 
-     ngx_http_cache_t  *c;
 
 
-     c = r->cache;
 
 
-     if (c->file.name.len) {
 
-         return NGX_OK;
 
-     }
 
 
-     c->file.name.len = path->name.len + 1 + path->len
 
-                        + 2 * NGX_HTTP_CACHE_KEY_LEN;
 
 
-     c->file.name.data = ngx_pnalloc(r->pool, c->file.name.len + 1);
 
-     if (c->file.name.data == NULL) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     ngx_memcpy(c->file.name.data, path->name.data, path->name.len);
 
 
-     p = c->file.name.data + path->name.len + 1 + path->len;
 
-     p = ngx_hex_dump(p, c->key, NGX_HTTP_CACHE_KEY_LEN);
 
-     *p = '\0';
 
 
-     ngx_create_hashed_filename(path, c->file.name.data, c->file.name.len);
 
 
-     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "cache file: \"%s\"", c->file.name.data);
 
 
-     return NGX_OK;
 
- }
 
 
 
- static ngx_http_file_cache_node_t *
 
- ngx_http_file_cache_lookup(ngx_http_file_cache_t *cache, u_char *key)
 
- {
 
-     ngx_int_t                    rc;
 
-     ngx_rbtree_key_t             node_key;
 
-     ngx_rbtree_node_t           *node, *sentinel;
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     ngx_memcpy((u_char *) &node_key, key, sizeof(ngx_rbtree_key_t));
 
 
-     node = cache->sh->rbtree.root;
 
-     sentinel = cache->sh->rbtree.sentinel;
 
 
-     while (node != sentinel) {
 
 
-         if (node_key < node->key) {
 
-             node = node->left;
 
-             continue;
 
-         }
 
 
-         if (node_key > node->key) {
 
-             node = node->right;
 
-             continue;
 
-         }
 
 
-         
 
-         fcn = (ngx_http_file_cache_node_t *) node;
 
 
-         rc = ngx_memcmp(&key[sizeof(ngx_rbtree_key_t)], fcn->key,
 
-                         NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
 
 
-         if (rc == 0) {
 
-             return fcn;
 
-         }
 
 
-         node = (rc < 0) ? node->left : node->right;
 
-     }
 
 
-     
 
-     return NULL;
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_rbtree_insert_value(ngx_rbtree_node_t *temp,
 
-     ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
 
- {
 
-     ngx_rbtree_node_t           **p;
 
-     ngx_http_file_cache_node_t   *cn, *cnt;
 
 
-     for ( ;; ) {
 
 
-         if (node->key < temp->key) {
 
 
-             p = &temp->left;
 
 
-         } else if (node->key > temp->key) {
 
 
-             p = &temp->right;
 
 
-         } else { 
 
-             cn = (ngx_http_file_cache_node_t *) node;
 
-             cnt = (ngx_http_file_cache_node_t *) temp;
 
 
-             p = (ngx_memcmp(cn->key, cnt->key,
 
-                             NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t))
 
-                  < 0)
 
-                     ? &temp->left : &temp->right;
 
-         }
 
 
-         if (*p == sentinel) {
 
-             break;
 
-         }
 
 
-         temp = *p;
 
-     }
 
 
-     *p = node;
 
-     node->parent = temp;
 
-     node->left = sentinel;
 
-     node->right = sentinel;
 
-     ngx_rbt_red(node);
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_vary(ngx_http_request_t *r, u_char *vary, size_t len,
 
-     u_char *hash)
 
- {
 
-     u_char     *p, *last;
 
-     ngx_str_t   name;
 
-     ngx_md5_t   md5;
 
-     u_char      buf[NGX_HTTP_CACHE_VARY_LEN];
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache vary: \"%*s\"", len, vary);
 
 
-     ngx_md5_init(&md5);
 
-     ngx_md5_update(&md5, r->cache->main, NGX_HTTP_CACHE_KEY_LEN);
 
 
-     ngx_strlow(buf, vary, len);
 
 
-     p = buf;
 
-     last = buf + len;
 
 
-     while (p < last) {
 
 
-         while (p < last && (*p == ' ' || *p == ',')) { p++; }
 
 
-         name.data = p;
 
 
-         while (p < last && *p != ',' && *p != ' ') { p++; }
 
 
-         name.len = p - name.data;
 
 
-         if (name.len == 0) {
 
-             break;
 
-         }
 
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                        "http file cache vary: %V", &name);
 
 
-         ngx_md5_update(&md5, name.data, name.len);
 
-         ngx_md5_update(&md5, (u_char *) ":", sizeof(":") - 1);
 
 
-         ngx_http_file_cache_vary_header(r, &md5, &name);
 
 
-         ngx_md5_update(&md5, (u_char *) CRLF, sizeof(CRLF) - 1);
 
-     }
 
 
-     ngx_md5_final(hash, &md5);
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_vary_header(ngx_http_request_t *r, ngx_md5_t *md5,
 
-     ngx_str_t *name)
 
- {
 
-     size_t            len;
 
-     u_char           *p, *start, *last;
 
-     ngx_uint_t        i, multiple, normalize;
 
-     ngx_list_part_t  *part;
 
-     ngx_table_elt_t  *header;
 
 
-     multiple = 0;
 
-     normalize = 0;
 
 
-     if (name->len == sizeof("Accept-Charset") - 1
 
-         && ngx_strncasecmp(name->data, (u_char *) "Accept-Charset",
 
-                            sizeof("Accept-Charset") - 1) == 0)
 
-     {
 
-         normalize = 1;
 
 
-     } else if (name->len == sizeof("Accept-Encoding") - 1
 
-         && ngx_strncasecmp(name->data, (u_char *) "Accept-Encoding",
 
-                            sizeof("Accept-Encoding") - 1) == 0)
 
-     {
 
-         normalize = 1;
 
 
-     } else if (name->len == sizeof("Accept-Language") - 1
 
-         && ngx_strncasecmp(name->data, (u_char *) "Accept-Language",
 
-                            sizeof("Accept-Language") - 1) == 0)
 
-     {
 
-         normalize = 1;
 
-     }
 
 
-     part = &r->headers_in.headers.part;
 
-     header = part->elts;
 
 
-     for (i = 0;  ; i++) {
 
 
-         if (i >= part->nelts) {
 
-             if (part->next == NULL) {
 
-                 break;
 
-             }
 
 
-             part = part->next;
 
-             header = part->elts;
 
-             i = 0;
 
-         }
 
 
-         if (header[i].hash == 0) {
 
-             continue;
 
-         }
 
 
-         if (header[i].key.len != name->len) {
 
-             continue;
 
-         }
 
 
-         if (ngx_strncasecmp(header[i].key.data, name->data, name->len) != 0) {
 
-             continue;
 
-         }
 
 
-         if (!normalize) {
 
 
-             if (multiple) {
 
-                 ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
 
-             }
 
 
-             ngx_md5_update(md5, header[i].value.data, header[i].value.len);
 
 
-             multiple = 1;
 
 
-             continue;
 
-         }
 
 
-         
 
-         p = header[i].value.data;
 
-         last = p + header[i].value.len;
 
 
-         while (p < last) {
 
 
-             while (p < last && (*p == ' ' || *p == ',')) { p++; }
 
 
-             start = p;
 
 
-             while (p < last && *p != ',' && *p != ' ') { p++; }
 
 
-             len = p - start;
 
 
-             if (len == 0) {
 
-                 break;
 
-             }
 
 
-             if (multiple) {
 
-                 ngx_md5_update(md5, (u_char *) ",", sizeof(",") - 1);
 
-             }
 
 
-             ngx_md5_update(md5, start, len);
 
 
-             multiple = 1;
 
-         }
 
-     }
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_reopen(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
-     ngx_http_file_cache_t  *cache;
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->file.log, 0,
 
-                    "http file cache reopen");
 
 
-     if (c->secondary) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       "cache file \"%s\" has incorrect vary hash",
 
-                       c->file.name.data);
 
-         return NGX_DECLINED;
 
-     }
 
 
-     cache = c->file_cache;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     c->node->count--;
 
-     c->node = NULL;
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     c->secondary = 1;
 
-     c->file.name.len = 0;
 
-     c->body_start = c->buf->end - c->buf->start;
 
 
-     ngx_memcpy(c->key, c->variant, NGX_HTTP_CACHE_KEY_LEN);
 
 
-     return ngx_http_file_cache_open(r);
 
- }
 
 
 
- ngx_int_t
 
- ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf)
 
- {
 
-     ngx_http_file_cache_header_t  *h = (ngx_http_file_cache_header_t *) buf;
 
 
-     u_char            *p;
 
-     ngx_str_t         *key;
 
-     ngx_uint_t         i;
 
-     ngx_http_cache_t  *c;
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache set header");
 
 
-     c = r->cache;
 
 
-     ngx_memzero(h, sizeof(ngx_http_file_cache_header_t));
 
 
-     h->version = NGX_HTTP_CACHE_VERSION;
 
-     h->valid_sec = c->valid_sec;
 
-     h->last_modified = c->last_modified;
 
-     h->date = c->date;
 
-     h->crc32 = c->crc32;
 
-     h->valid_msec = (u_short) c->valid_msec;
 
-     h->header_start = (u_short) c->header_start;
 
-     h->body_start = (u_short) c->body_start;
 
 
-     if (c->etag.len <= NGX_HTTP_CACHE_ETAG_LEN) {
 
-         h->etag_len = (u_char) c->etag.len;
 
-         ngx_memcpy(h->etag, c->etag.data, c->etag.len);
 
-     }
 
 
-     if (c->vary.len) {
 
-         if (c->vary.len > NGX_HTTP_CACHE_VARY_LEN) {
 
-             
-             c->vary.len = NGX_HTTP_CACHE_VARY_LEN;
 
-         }
 
 
-         h->vary_len = (u_char) c->vary.len;
 
-         ngx_memcpy(h->vary, c->vary.data, c->vary.len);
 
 
-         ngx_http_file_cache_vary(r, c->vary.data, c->vary.len, c->variant);
 
-         ngx_memcpy(h->variant, c->variant, NGX_HTTP_CACHE_KEY_LEN);
 
-     }
 
 
-     if (ngx_http_file_cache_update_variant(r, c) != NGX_OK) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     p = buf + sizeof(ngx_http_file_cache_header_t);
 
 
-     p = ngx_cpymem(p, ngx_http_file_cache_key, sizeof(ngx_http_file_cache_key));
 
 
-     key = c->keys.elts;
 
-     for (i = 0; i < c->keys.nelts; i++) {
 
-         p = ngx_copy(p, key[i].data, key[i].len);
 
-     }
 
 
-     *p = LF;
 
 
-     return NGX_OK;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_update_variant(ngx_http_request_t *r, ngx_http_cache_t *c)
 
- {
 
-     ngx_http_file_cache_t  *cache;
 
 
-     if (!c->secondary) {
 
-         return NGX_OK;
 
-     }
 
 
-     if (c->vary.len
 
-         && ngx_memcmp(c->variant, c->key, NGX_HTTP_CACHE_KEY_LEN) == 0)
 
-     {
 
-         return NGX_OK;
 
-     }
 
 
-     
 
-     cache = c->file_cache;
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache main key");
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     c->node->count--;
 
-     c->node->updating = 0;
 
-     c->node = NULL;
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     c->file.name.len = 0;
 
 
-     ngx_memcpy(c->key, c->main, NGX_HTTP_CACHE_KEY_LEN);
 
 
-     if (ngx_http_file_cache_exists(cache, c) == NGX_ERROR) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     if (ngx_http_file_cache_name(r, cache->path) != NGX_OK) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     return NGX_OK;
 
- }
 
 
 
- void
 
- ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf)
 
- {
 
-     off_t                   fs_size;
 
-     ngx_int_t               rc;
 
-     ngx_file_uniq_t         uniq;
 
-     ngx_file_info_t         fi;
 
-     ngx_http_cache_t        *c;
 
-     ngx_ext_rename_file_t   ext;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     c = r->cache;
 
 
-     if (c->updated) {
 
-         return;
 
-     }
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache update");
 
 
-     cache = c->file_cache;
 
 
-     c->updated = 1;
 
-     c->updating = 0;
 
 
-     uniq = 0;
 
-     fs_size = 0;
 
 
-     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache rename: \"%s\" to \"%s\"",
 
-                    tf->file.name.data, c->file.name.data);
 
 
-     ext.access = NGX_FILE_OWNER_ACCESS;
 
-     ext.path_access = NGX_FILE_OWNER_ACCESS;
 
-     ext.time = -1;
 
-     ext.create_path = 1;
 
-     ext.delete_file = 1;
 
-     ext.log = r->connection->log;
 
 
-     rc = ngx_ext_rename_file(&tf->file.name, &c->file.name, &ext);
 
 
-     if (rc == NGX_OK) {
 
 
-         if (ngx_fd_info(tf->file.fd, &fi) == NGX_FILE_ERROR) {
 
-             ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
 
-                           ngx_fd_info_n " \"%s\" failed", tf->file.name.data);
 
 
-             rc = NGX_ERROR;
 
 
-         } else {
 
-             uniq = ngx_file_uniq(&fi);
 
-             fs_size = (ngx_file_fs_size(&fi) + cache->bsize - 1) / cache->bsize;
 
-         }
 
-     }
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     c->node->count--;
 
-     c->node->uniq = uniq;
 
-     c->node->body_start = c->body_start;
 
 
-     cache->sh->size += fs_size - c->node->fs_size;
 
-     c->node->fs_size = fs_size;
 
 
-     if (rc == NGX_OK) {
 
-         c->node->exists = 1;
 
-     }
 
 
-     c->node->updating = 0;
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
- }
 
 
 
- void
 
- ngx_http_file_cache_update_header(ngx_http_request_t *r)
 
- {
 
-     ssize_t                        n;
 
-     ngx_err_t                      err;
 
-     ngx_file_t                     file;
 
-     ngx_file_info_t                fi;
 
-     ngx_http_cache_t              *c;
 
-     ngx_http_file_cache_header_t   h;
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache update header");
 
 
-     c = r->cache;
 
 
-     ngx_memzero(&file, sizeof(ngx_file_t));
 
 
-     file.name = c->file.name;
 
-     file.log = r->connection->log;
 
-     file.fd = ngx_open_file(file.name.data, NGX_FILE_RDWR, NGX_FILE_OPEN, 0);
 
 
-     if (file.fd == NGX_INVALID_FILE) {
 
-         err = ngx_errno;
 
 
-         
 
-         if (err == NGX_ENOENT) {
 
-             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                            "http file cache \"%s\" not found",
 
-                            file.name.data);
 
-             return;
 
-         }
 
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, err,
 
-                       ngx_open_file_n " \"%s\" failed", file.name.data);
 
-         return;
 
-     }
 
 
-     
 
-     if (ngx_fd_info(file.fd, &fi) == NGX_FILE_ERROR) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
 
-                       ngx_fd_info_n " \"%s\" failed", file.name.data);
 
-         goto done;
 
-     }
 
 
-     if (c->uniq != ngx_file_uniq(&fi)
 
-         || c->length != ngx_file_size(&fi))
 
-     {
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                        "http file cache \"%s\" changed",
 
-                        file.name.data);
 
-         goto done;
 
-     }
 
 
-     n = ngx_read_file(&file, (u_char *) &h,
 
-                       sizeof(ngx_http_file_cache_header_t), 0);
 
 
-     if (n == NGX_ERROR) {
 
-         goto done;
 
-     }
 
 
-     if ((size_t) n != sizeof(ngx_http_file_cache_header_t)) {
 
-         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
 
-                       ngx_read_file_n " read only %z of %z from \"%s\"",
 
-                       n, sizeof(ngx_http_file_cache_header_t), file.name.data);
 
-         goto done;
 
-     }
 
 
-     if (h.version != NGX_HTTP_CACHE_VERSION
 
-         || h.last_modified != c->last_modified
 
-         || h.crc32 != c->crc32
 
-         || h.header_start != c->header_start
 
-         || h.body_start != c->body_start)
 
-     {
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                        "http file cache \"%s\" content changed",
 
-                        file.name.data);
 
-         goto done;
 
-     }
 
 
-     
 
-     ngx_memzero(&h, sizeof(ngx_http_file_cache_header_t));
 
 
-     h.version = NGX_HTTP_CACHE_VERSION;
 
-     h.valid_sec = c->valid_sec;
 
-     h.last_modified = c->last_modified;
 
-     h.date = c->date;
 
-     h.crc32 = c->crc32;
 
-     h.valid_msec = (u_short) c->valid_msec;
 
-     h.header_start = (u_short) c->header_start;
 
-     h.body_start = (u_short) c->body_start;
 
 
-     if (c->etag.len <= NGX_HTTP_CACHE_ETAG_LEN) {
 
-         h.etag_len = (u_char) c->etag.len;
 
-         ngx_memcpy(h.etag, c->etag.data, c->etag.len);
 
-     }
 
 
-     if (c->vary.len) {
 
-         if (c->vary.len > NGX_HTTP_CACHE_VARY_LEN) {
 
-             
-             c->vary.len = NGX_HTTP_CACHE_VARY_LEN;
 
-         }
 
 
-         h.vary_len = (u_char) c->vary.len;
 
-         ngx_memcpy(h.vary, c->vary.data, c->vary.len);
 
 
-         ngx_http_file_cache_vary(r, c->vary.data, c->vary.len, c->variant);
 
-         ngx_memcpy(h.variant, c->variant, NGX_HTTP_CACHE_KEY_LEN);
 
-     }
 
 
-     (void) ngx_write_file(&file, (u_char *) &h,
 
-                           sizeof(ngx_http_file_cache_header_t), 0);
 
 
- done:
 
 
-     if (ngx_close_file(file.fd) == NGX_FILE_ERROR) {
 
-         ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
 
-                       ngx_close_file_n " \"%s\" failed", file.name.data);
 
-     }
 
- }
 
 
 
- ngx_int_t
 
- ngx_http_cache_send(ngx_http_request_t *r)
 
- {
 
-     ngx_int_t          rc;
 
-     ngx_buf_t         *b;
 
-     ngx_chain_t        out;
 
-     ngx_http_cache_t  *c;
 
 
-     c = r->cache;
 
 
-     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
 
-                    "http file cache send: %s", c->file.name.data);
 
 
-     if (r != r->main && c->length - c->body_start == 0) {
 
-         return ngx_http_send_header(r);
 
-     }
 
 
-     
 
-     b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
 
-     if (b == NULL) {
 
-         return NGX_HTTP_INTERNAL_SERVER_ERROR;
 
-     }
 
 
-     b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t));
 
-     if (b->file == NULL) {
 
-         return NGX_HTTP_INTERNAL_SERVER_ERROR;
 
-     }
 
 
-     rc = ngx_http_send_header(r);
 
 
-     if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
 
-         return rc;
 
-     }
 
 
-     b->file_pos = c->body_start;
 
-     b->file_last = c->length;
 
 
-     b->in_file = (c->length - c->body_start) ? 1: 0;
 
-     b->last_buf = (r == r->main) ? 1: 0;
 
-     b->last_in_chain = 1;
 
 
-     b->file->fd = c->file.fd;
 
-     b->file->name = c->file.name;
 
-     b->file->log = r->connection->log;
 
 
-     out.buf = b;
 
-     out.next = NULL;
 
 
-     return ngx_http_output_filter(r, &out);
 
- }
 
 
 
- void
 
- ngx_http_file_cache_free(ngx_http_cache_t *c, ngx_temp_file_t *tf)
 
- {
 
-     ngx_http_file_cache_t       *cache;
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     if (c->updated || c->node == NULL) {
 
-         return;
 
-     }
 
 
-     cache = c->file_cache;
 
 
-     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->file.log, 0,
 
-                    "http file cache free, fd: %d", c->file.fd);
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     fcn = c->node;
 
-     fcn->count--;
 
 
-     if (c->updating && fcn->lock_time == c->lock_time) {
 
-         fcn->updating = 0;
 
-     }
 
 
-     if (c->error) {
 
-         fcn->error = c->error;
 
 
-         if (c->valid_sec) {
 
-             fcn->valid_sec = c->valid_sec;
 
-             fcn->valid_msec = c->valid_msec;
 
-         }
 
 
-     } else if (!fcn->exists && fcn->count == 0 && c->min_uses == 1) {
 
-         ngx_queue_remove(&fcn->queue);
 
-         ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
 
-         ngx_slab_free_locked(cache->shpool, fcn);
 
-         c->node = NULL;
 
-     }
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     c->updated = 1;
 
-     c->updating = 0;
 
 
-     if (c->temp_file) {
 
-         if (tf && tf->file.fd != NGX_INVALID_FILE) {
 
-             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->file.log, 0,
 
-                            "http file cache incomplete: \"%s\"",
 
-                            tf->file.name.data);
 
 
-             if (ngx_delete_file(tf->file.name.data) == NGX_FILE_ERROR) {
 
-                 ngx_log_error(NGX_LOG_CRIT, c->file.log, ngx_errno,
 
-                               ngx_delete_file_n " \"%s\" failed",
 
-                               tf->file.name.data);
 
-             }
 
-         }
 
-     }
 
 
-     if (c->wait_event.timer_set) {
 
-         ngx_del_timer(&c->wait_event);
 
-     }
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_cleanup(void *data)
 
- {
 
-     ngx_http_cache_t  *c = data;
 
 
-     if (c->updated) {
 
-         return;
 
-     }
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->file.log, 0,
 
-                    "http file cache cleanup");
 
 
-     if (c->updating) {
 
-         ngx_log_error(NGX_LOG_ALERT, c->file.log, 0,
 
-                       "stalled cache updating, error:%ui", c->error);
 
-     }
 
 
-     ngx_http_file_cache_free(c, NULL);
 
- }
 
 
 
- static time_t
 
- ngx_http_file_cache_forced_expire(ngx_http_file_cache_t *cache)
 
- {
 
-     u_char                      *name;
 
-     size_t                       len;
 
-     time_t                       wait;
 
-     ngx_uint_t                   tries;
 
-     ngx_path_t                  *path;
 
-     ngx_queue_t                 *q;
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                    "http file cache forced expire");
 
 
-     path = cache->path;
 
-     len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
 
 
-     name = ngx_alloc(len + 1, ngx_cycle->log);
 
-     if (name == NULL) {
 
-         return 10;
 
-     }
 
 
-     ngx_memcpy(name, path->name.data, path->name.len);
 
 
-     wait = 10;
 
-     tries = 20;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     for (q = ngx_queue_last(&cache->sh->queue);
 
-          q != ngx_queue_sentinel(&cache->sh->queue);
 
-          q = ngx_queue_prev(q))
 
-     {
 
-         fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
 
 
-         ngx_log_debug6(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                   "http file cache forced expire: #%d %d %02xd%02xd%02xd%02xd",
 
-                   fcn->count, fcn->exists,
 
-                   fcn->key[0], fcn->key[1], fcn->key[2], fcn->key[3]);
 
 
-         if (fcn->count == 0) {
 
-             ngx_http_file_cache_delete(cache, q, name);
 
-             wait = 0;
 
 
-         } else {
 
-             if (--tries) {
 
-                 continue;
 
-             }
 
 
-             wait = 1;
 
-         }
 
 
-         break;
 
-     }
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     ngx_free(name);
 
 
-     return wait;
 
- }
 
 
 
- static time_t
 
- ngx_http_file_cache_expire(ngx_http_file_cache_t *cache)
 
- {
 
-     u_char                      *name, *p;
 
-     size_t                       len;
 
-     time_t                       now, wait;
 
-     ngx_path_t                  *path;
 
-     ngx_queue_t                 *q;
 
-     ngx_http_file_cache_node_t  *fcn;
 
-     u_char                       key[2 * NGX_HTTP_CACHE_KEY_LEN];
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                    "http file cache expire");
 
 
-     path = cache->path;
 
-     len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
 
 
-     name = ngx_alloc(len + 1, ngx_cycle->log);
 
-     if (name == NULL) {
 
-         return 10;
 
-     }
 
 
-     ngx_memcpy(name, path->name.data, path->name.len);
 
 
-     now = ngx_time();
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     for ( ;; ) {
 
 
-         if (ngx_quit || ngx_terminate) {
 
-             wait = 1;
 
-             break;
 
-         }
 
 
-         if (ngx_queue_empty(&cache->sh->queue)) {
 
-             wait = 10;
 
-             break;
 
-         }
 
 
-         q = ngx_queue_last(&cache->sh->queue);
 
 
-         fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
 
 
-         wait = fcn->expire - now;
 
 
-         if (wait > 0) {
 
-             wait = wait > 10 ? 10 : wait;
 
-             break;
 
-         }
 
 
-         ngx_log_debug6(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                        "http file cache expire: #%d %d %02xd%02xd%02xd%02xd",
 
-                        fcn->count, fcn->exists,
 
-                        fcn->key[0], fcn->key[1], fcn->key[2], fcn->key[3]);
 
 
-         if (fcn->count == 0) {
 
-             ngx_http_file_cache_delete(cache, q, name);
 
-             continue;
 
-         }
 
 
-         if (fcn->deleting) {
 
-             wait = 1;
 
-             break;
 
-         }
 
 
-         p = ngx_hex_dump(key, (u_char *) &fcn->node.key,
 
-                          sizeof(ngx_rbtree_key_t));
 
-         len = NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t);
 
-         (void) ngx_hex_dump(p, fcn->key, len);
 
 
-         
 
-         ngx_queue_remove(q);
 
-         fcn->expire = ngx_time() + cache->inactive;
 
-         ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
 
 
-         ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0,
 
-                       "ignore long locked inactive cache entry %*s, count:%d",
 
-                       2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count);
 
-     }
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     ngx_free(name);
 
 
-     return wait;
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_delete(ngx_http_file_cache_t *cache, ngx_queue_t *q,
 
-     u_char *name)
 
- {
 
-     u_char                      *p;
 
-     size_t                       len;
 
-     ngx_path_t                  *path;
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     fcn = ngx_queue_data(q, ngx_http_file_cache_node_t, queue);
 
 
-     if (fcn->exists) {
 
-         cache->sh->size -= fcn->fs_size;
 
 
-         path = cache->path;
 
-         p = name + path->name.len + 1 + path->len;
 
-         p = ngx_hex_dump(p, (u_char *) &fcn->node.key,
 
-                          sizeof(ngx_rbtree_key_t));
 
-         len = NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t);
 
-         p = ngx_hex_dump(p, fcn->key, len);
 
-         *p = '\0';
 
 
-         fcn->count++;
 
-         fcn->deleting = 1;
 
-         ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-         len = path->name.len + 1 + path->len + 2 * NGX_HTTP_CACHE_KEY_LEN;
 
-         ngx_create_hashed_filename(path, name, len);
 
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                        "http file cache expire: \"%s\"", name);
 
 
-         if (ngx_delete_file(name) == NGX_FILE_ERROR) {
 
-             ngx_log_error(NGX_LOG_CRIT, ngx_cycle->log, ngx_errno,
 
-                           ngx_delete_file_n " \"%s\" failed", name);
 
-         }
 
 
-         ngx_shmtx_lock(&cache->shpool->mutex);
 
-         fcn->count--;
 
-         fcn->deleting = 0;
 
-     }
 
 
-     if (fcn->count == 0) {
 
-         ngx_queue_remove(q);
 
-         ngx_rbtree_delete(&cache->sh->rbtree, &fcn->node);
 
-         ngx_slab_free_locked(cache->shpool, fcn);
 
-     }
 
- }
 
 
 
- static time_t
 
- ngx_http_file_cache_manager(void *data)
 
- {
 
-     ngx_http_file_cache_t  *cache = data;
 
 
-     off_t   size;
 
-     time_t  next, wait;
 
 
-     next = ngx_http_file_cache_expire(cache);
 
 
-     cache->last = ngx_current_msec;
 
-     cache->files = 0;
 
 
-     for ( ;; ) {
 
-         ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-         size = cache->sh->size;
 
 
-         ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                        "http file cache size: %O", size);
 
 
-         if (size < cache->max_size) {
 
-             return next;
 
-         }
 
 
-         wait = ngx_http_file_cache_forced_expire(cache);
 
 
-         if (wait > 0) {
 
-             return wait;
 
-         }
 
 
-         if (ngx_quit || ngx_terminate) {
 
-             return next;
 
-         }
 
-     }
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_loader(void *data)
 
- {
 
-     ngx_http_file_cache_t  *cache = data;
 
 
-     ngx_tree_ctx_t  tree;
 
 
-     if (!cache->sh->cold || cache->sh->loading) {
 
-         return;
 
-     }
 
 
-     if (!ngx_atomic_cmp_set(&cache->sh->loading, 0, ngx_pid)) {
 
-         return;
 
-     }
 
 
-     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                    "http file cache loader");
 
 
-     tree.init_handler = NULL;
 
-     tree.file_handler = ngx_http_file_cache_manage_file;
 
-     tree.pre_tree_handler = ngx_http_file_cache_manage_directory;
 
-     tree.post_tree_handler = ngx_http_file_cache_noop;
 
-     tree.spec_handler = ngx_http_file_cache_delete_file;
 
-     tree.data = cache;
 
-     tree.alloc = 0;
 
-     tree.log = ngx_cycle->log;
 
 
-     cache->last = ngx_current_msec;
 
-     cache->files = 0;
 
 
-     if (ngx_walk_tree(&tree, &cache->path->name) == NGX_ABORT) {
 
-         cache->sh->loading = 0;
 
-         return;
 
-     }
 
 
-     cache->sh->cold = 0;
 
-     cache->sh->loading = 0;
 
 
-     ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0,
 
-                   "http file cache: %V %.3fM, bsize: %uz",
 
-                   &cache->path->name,
 
-                   ((double) cache->sh->size * cache->bsize) / (1024 * 1024),
 
-                   cache->bsize);
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_noop(ngx_tree_ctx_t *ctx, ngx_str_t *path)
 
- {
 
-     return NGX_OK;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_manage_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
 
- {
 
-     ngx_msec_t              elapsed;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     cache = ctx->data;
 
 
-     if (ngx_http_file_cache_add_file(ctx, path) != NGX_OK) {
 
-         (void) ngx_http_file_cache_delete_file(ctx, path);
 
-     }
 
 
-     if (++cache->files >= cache->loader_files) {
 
-         ngx_http_file_cache_loader_sleep(cache);
 
 
-     } else {
 
-         ngx_time_update();
 
 
-         elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last));
 
 
-         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0,
 
-                        "http file cache loader time elapsed: %M", elapsed);
 
 
-         if (elapsed >= cache->loader_threshold) {
 
-             ngx_http_file_cache_loader_sleep(cache);
 
-         }
 
-     }
 
 
-     return (ngx_quit || ngx_terminate) ? NGX_ABORT : NGX_OK;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_manage_directory(ngx_tree_ctx_t *ctx, ngx_str_t *path)
 
- {
 
-     if (path->len >= 5
 
-         && ngx_strncmp(path->data + path->len - 5, "/temp", 5) == 0)
 
-     {
 
-         return NGX_DECLINED;
 
-     }
 
 
-     return NGX_OK;
 
- }
 
 
 
- static void
 
- ngx_http_file_cache_loader_sleep(ngx_http_file_cache_t *cache)
 
- {
 
-     ngx_msleep(cache->loader_sleep);
 
 
-     ngx_time_update();
 
 
-     cache->last = ngx_current_msec;
 
-     cache->files = 0;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_add_file(ngx_tree_ctx_t *ctx, ngx_str_t *name)
 
- {
 
-     u_char                 *p;
 
-     ngx_int_t               n;
 
-     ngx_uint_t              i;
 
-     ngx_http_cache_t        c;
 
-     ngx_http_file_cache_t  *cache;
 
 
-     if (name->len < 2 * NGX_HTTP_CACHE_KEY_LEN) {
 
-         return NGX_ERROR;
 
-     }
 
 
-     if (ctx->size < (off_t) sizeof(ngx_http_file_cache_header_t)) {
 
-         ngx_log_error(NGX_LOG_CRIT, ctx->log, 0,
 
-                       "cache file \"%s\" is too small", name->data);
 
-         return NGX_ERROR;
 
-     }
 
 
-     ngx_memzero(&c, sizeof(ngx_http_cache_t));
 
-     cache = ctx->data;
 
 
-     c.length = ctx->size;
 
-     c.fs_size = (ctx->fs_size + cache->bsize - 1) / cache->bsize;
 
 
-     p = &name->data[name->len - 2 * NGX_HTTP_CACHE_KEY_LEN];
 
 
-     for (i = 0; i < NGX_HTTP_CACHE_KEY_LEN; i++) {
 
-         n = ngx_hextoi(p, 2);
 
 
-         if (n == NGX_ERROR) {
 
-             return NGX_ERROR;
 
-         }
 
 
-         p += 2;
 
 
-         c.key[i] = (u_char) n;
 
-     }
 
 
-     return ngx_http_file_cache_add(cache, &c);
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_add(ngx_http_file_cache_t *cache, ngx_http_cache_t *c)
 
- {
 
-     ngx_http_file_cache_node_t  *fcn;
 
 
-     ngx_shmtx_lock(&cache->shpool->mutex);
 
 
-     fcn = ngx_http_file_cache_lookup(cache, c->key);
 
 
-     if (fcn == NULL) {
 
 
-         fcn = ngx_slab_calloc_locked(cache->shpool,
 
-                                      sizeof(ngx_http_file_cache_node_t));
 
-         if (fcn == NULL) {
 
-             ngx_shmtx_unlock(&cache->shpool->mutex);
 
-             return NGX_ERROR;
 
-         }
 
 
-         ngx_memcpy((u_char *) &fcn->node.key, c->key, sizeof(ngx_rbtree_key_t));
 
 
-         ngx_memcpy(fcn->key, &c->key[sizeof(ngx_rbtree_key_t)],
 
-                    NGX_HTTP_CACHE_KEY_LEN - sizeof(ngx_rbtree_key_t));
 
 
-         ngx_rbtree_insert(&cache->sh->rbtree, &fcn->node);
 
 
-         fcn->uses = 1;
 
-         fcn->exists = 1;
 
-         fcn->fs_size = c->fs_size;
 
 
-         cache->sh->size += c->fs_size;
 
 
-     } else {
 
-         ngx_queue_remove(&fcn->queue);
 
-     }
 
 
-     fcn->expire = ngx_time() + cache->inactive;
 
 
-     ngx_queue_insert_head(&cache->sh->queue, &fcn->queue);
 
 
-     ngx_shmtx_unlock(&cache->shpool->mutex);
 
 
-     return NGX_OK;
 
- }
 
 
 
- static ngx_int_t
 
- ngx_http_file_cache_delete_file(ngx_tree_ctx_t *ctx, ngx_str_t *path)
 
- {
 
-     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->log, 0,
 
-                    "http file cache delete: \"%s\"", path->data);
 
 
-     if (ngx_delete_file(path->data) == NGX_FILE_ERROR) {
 
-         ngx_log_error(NGX_LOG_CRIT, ctx->log, ngx_errno,
 
-                       ngx_delete_file_n " \"%s\" failed", path->data);
 
-     }
 
 
-     return NGX_OK;
 
- }
 
 
 
- time_t
 
- ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status)
 
- {
 
-     ngx_uint_t               i;
 
-     ngx_http_cache_valid_t  *valid;
 
 
-     if (cache_valid == NULL) {
 
-         return 0;
 
-     }
 
 
-     valid = cache_valid->elts;
 
-     for (i = 0; i < cache_valid->nelts; i++) {
 
 
-         if (valid[i].status == 0) {
 
-             return valid[i].valid;
 
-         }
 
 
-         if (valid[i].status == status) {
 
-             return valid[i].valid;
 
-         }
 
-     }
 
 
-     return 0;
 
- }
 
 
 
- char *
 
- ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 
- {
 
-     char  *confp = conf;
 
 
-     off_t                   max_size;
 
-     u_char                 *last, *p;
 
-     time_t                  inactive;
 
-     size_t                  len;
 
-     ssize_t                 size;
 
-     ngx_str_t               s, name, *value;
 
-     ngx_int_t               loader_files;
 
-     ngx_msec_t              loader_sleep, loader_threshold;
 
-     ngx_uint_t              i, n, use_temp_path;
 
-     ngx_array_t            *caches;
 
-     ngx_http_file_cache_t  *cache, **ce;
 
 
-     cache = ngx_pcalloc(cf->pool, sizeof(ngx_http_file_cache_t));
 
-     if (cache == NULL) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     cache->path = ngx_pcalloc(cf->pool, sizeof(ngx_path_t));
 
-     if (cache->path == NULL) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     use_temp_path = 1;
 
 
-     inactive = 600;
 
-     loader_files = 100;
 
-     loader_sleep = 50;
 
-     loader_threshold = 200;
 
 
-     name.len = 0;
 
-     size = 0;
 
-     max_size = NGX_MAX_OFF_T_VALUE;
 
 
-     value = cf->args->elts;
 
 
-     cache->path->name = value[1];
 
 
-     if (cache->path->name.data[cache->path->name.len - 1] == '/') {
 
-         cache->path->name.len--;
 
-     }
 
 
-     if (ngx_conf_full_name(cf->cycle, &cache->path->name, 0) != NGX_OK) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     for (i = 2; i < cf->args->nelts; i++) {
 
 
-         if (ngx_strncmp(value[i].data, "levels=", 7) == 0) {
 
 
-             p = value[i].data + 7;
 
-             last = value[i].data + value[i].len;
 
 
-             for (n = 0; n < 3 && p < last; n++) {
 
 
-                 if (*p > '0' && *p < '3') {
 
 
-                     cache->path->level[n] = *p++ - '0';
 
-                     cache->path->len += cache->path->level[n] + 1;
 
 
-                     if (p == last) {
 
-                         break;
 
-                     }
 
 
-                     if (*p++ == ':' && n < 2 && p != last) {
 
-                         continue;
 
-                     }
 
 
-                     goto invalid_levels;
 
-                 }
 
 
-                 goto invalid_levels;
 
-             }
 
 
-             if (cache->path->len < 10 + 3) {
 
-                 continue;
 
-             }
 
 
-         invalid_levels:
 
 
-             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                "invalid \"levels\" \"%V\"", &value[i]);
 
-             return NGX_CONF_ERROR;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "use_temp_path=", 14) == 0) {
 
 
-             if (ngx_strcmp(&value[i].data[14], "on") == 0) {
 
-                 use_temp_path = 1;
 
 
-             } else if (ngx_strcmp(&value[i].data[14], "off") == 0) {
 
-                 use_temp_path = 0;
 
 
-             } else {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                    "invalid use_temp_path value \"%V\", "
 
-                                    "it must be \"on\" or \"off\"",
 
-                                    &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "keys_zone=", 10) == 0) {
 
 
-             name.data = value[i].data + 10;
 
 
-             p = (u_char *) ngx_strchr(name.data, ':');
 
 
-             if (p) {
 
-                 name.len = p - name.data;
 
 
-                 p++;
 
 
-                 s.len = value[i].data + value[i].len - p;
 
-                 s.data = p;
 
 
-                 size = ngx_parse_size(&s);
 
-                 if (size > 8191) {
 
-                     continue;
 
-                 }
 
-             }
 
 
-             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                "invalid keys zone size \"%V\"", &value[i]);
 
-             return NGX_CONF_ERROR;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "inactive=", 9) == 0) {
 
 
-             s.len = value[i].len - 9;
 
-             s.data = value[i].data + 9;
 
 
-             inactive = ngx_parse_time(&s, 1);
 
-             if (inactive == (time_t) NGX_ERROR) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                    "invalid inactive value \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "max_size=", 9) == 0) {
 
 
-             s.len = value[i].len - 9;
 
-             s.data = value[i].data + 9;
 
 
-             max_size = ngx_parse_offset(&s);
 
-             if (max_size < 0) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                    "invalid max_size value \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "loader_files=", 13) == 0) {
 
 
-             loader_files = ngx_atoi(value[i].data + 13, value[i].len - 13);
 
-             if (loader_files == NGX_ERROR) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "invalid loader_files value \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "loader_sleep=", 13) == 0) {
 
 
-             s.len = value[i].len - 13;
 
-             s.data = value[i].data + 13;
 
 
-             loader_sleep = ngx_parse_time(&s, 0);
 
-             if (loader_sleep == (ngx_msec_t) NGX_ERROR) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "invalid loader_sleep value \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         if (ngx_strncmp(value[i].data, "loader_threshold=", 17) == 0) {
 
 
-             s.len = value[i].len - 17;
 
-             s.data = value[i].data + 17;
 
 
-             loader_threshold = ngx_parse_time(&s, 0);
 
-             if (loader_threshold == (ngx_msec_t) NGX_ERROR) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "invalid loader_threshold value \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             continue;
 
-         }
 
 
-         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "invalid parameter \"%V\"", &value[i]);
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     if (name.len == 0 || size == 0) {
 
-         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "\"%V\" must have \"keys_zone\" parameter",
 
-                            &cmd->name);
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     cache->path->manager = ngx_http_file_cache_manager;
 
-     cache->path->loader = ngx_http_file_cache_loader;
 
-     cache->path->data = cache;
 
-     cache->path->conf_file = cf->conf_file->file.name.data;
 
-     cache->path->line = cf->conf_file->line;
 
-     cache->loader_files = loader_files;
 
-     cache->loader_sleep = loader_sleep;
 
-     cache->loader_threshold = loader_threshold;
 
 
-     if (ngx_add_path(cf, &cache->path) != NGX_OK) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     if (!use_temp_path) {
 
-         cache->temp_path = ngx_pcalloc(cf->pool, sizeof(ngx_path_t));
 
-         if (cache->temp_path == NULL) {
 
-             return NGX_CONF_ERROR;
 
-         }
 
 
-         len = cache->path->name.len + sizeof("/temp") - 1;
 
 
-         p = ngx_pnalloc(cf->pool, len + 1);
 
-         if (p == NULL) {
 
-             return NGX_CONF_ERROR;
 
-         }
 
 
-         cache->temp_path->name.len = len;
 
-         cache->temp_path->name.data = p;
 
 
-         p = ngx_cpymem(p, cache->path->name.data, cache->path->name.len);
 
-         ngx_memcpy(p, "/temp", sizeof("/temp"));
 
 
-         ngx_memcpy(&cache->temp_path->level, &cache->path->level,
 
-                    3 * sizeof(size_t));
 
 
-         cache->temp_path->len = cache->path->len;
 
-         cache->temp_path->conf_file = cf->conf_file->file.name.data;
 
-         cache->temp_path->line = cf->conf_file->line;
 
 
-         if (ngx_add_path(cf, &cache->temp_path) != NGX_OK) {
 
-             return NGX_CONF_ERROR;
 
-         }
 
-     }
 
 
-     cache->shm_zone = ngx_shared_memory_add(cf, &name, size, cmd->post);
 
-     if (cache->shm_zone == NULL) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     if (cache->shm_zone->data) {
 
-         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "duplicate zone \"%V\"", &name);
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
 
-     cache->shm_zone->init = ngx_http_file_cache_init;
 
-     cache->shm_zone->data = cache;
 
 
-     cache->inactive = inactive;
 
-     cache->max_size = max_size;
 
 
-     caches = (ngx_array_t *) (confp + cmd->offset);
 
 
-     ce = ngx_array_push(caches);
 
-     if (ce == NULL) {
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     *ce = cache;
 
 
-     return NGX_CONF_OK;
 
- }
 
 
 
- char *
 
- ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd,
 
-     void *conf)
 
- {
 
-     char  *p = conf;
 
 
-     time_t                    valid;
 
-     ngx_str_t                *value;
 
-     ngx_uint_t                i, n, status;
 
-     ngx_array_t             **a;
 
-     ngx_http_cache_valid_t   *v;
 
-     static ngx_uint_t         statuses[] = { 200, 301, 302 };
 
 
-     a = (ngx_array_t **) (p + cmd->offset);
 
 
-     if (*a == NGX_CONF_UNSET_PTR) {
 
-         *a = ngx_array_create(cf->pool, 1, sizeof(ngx_http_cache_valid_t));
 
-         if (*a == NULL) {
 
-             return NGX_CONF_ERROR;
 
-         }
 
-     }
 
 
-     value = cf->args->elts;
 
-     n = cf->args->nelts - 1;
 
 
-     valid = ngx_parse_time(&value[n], 1);
 
-     if (valid == (time_t) NGX_ERROR) {
 
-         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                            "invalid time value \"%V\"", &value[n]);
 
-         return NGX_CONF_ERROR;
 
-     }
 
 
-     if (n == 1) {
 
 
-         for (i = 0; i < 3; i++) {
 
-             v = ngx_array_push(*a);
 
-             if (v == NULL) {
 
-                 return NGX_CONF_ERROR;
 
-             }
 
 
-             v->status = statuses[i];
 
-             v->valid = valid;
 
-         }
 
 
-         return NGX_CONF_OK;
 
-     }
 
 
-     for (i = 1; i < n; i++) {
 
 
-         if (ngx_strcmp(value[i].data, "any") == 0) {
 
 
-             status = 0;
 
 
-         } else {
 
 
-             status = ngx_atoi(value[i].data, value[i].len);
 
-             if (status < 100) {
 
-                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
 
-                                    "invalid status \"%V\"", &value[i]);
 
-                 return NGX_CONF_ERROR;
 
-             }
 
-         }
 
 
-         v = ngx_array_push(*a);
 
-         if (v == NULL) {
 
-             return NGX_CONF_ERROR;
 
-         }
 
 
-         v->status = status;
 
-         v->valid = valid;
 
-     }
 
 
-     return NGX_CONF_OK;
 
- }
 
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