diff options
Diffstat (limited to 'app/nginx/src/http/ngx_http_file_cache.c')
-rw-r--r-- | app/nginx/src/http/ngx_http_file_cache.c | 2656 |
1 files changed, 2656 insertions, 0 deletions
diff --git a/app/nginx/src/http/ngx_http_file_cache.c b/app/nginx/src/http/ngx_http_file_cache.c new file mode 100644 index 0000000..8c75f95 --- /dev/null +++ b/app/nginx/src/http/ngx_http_file_cache.c @@ -0,0 +1,2656 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#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 +#if (NGX_THREADS) +static ngx_int_t ngx_http_cache_thread_handler(ngx_thread_task_t *task, + ngx_file_t *file); +static void ngx_http_cache_thread_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); +static void ngx_http_file_cache_set_watermark(ngx_http_file_cache_t *cache); + + +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 < NGX_MAX_PATH_LEVEL; 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->sh->count = 0; + cache->sh->watermark = (ngx_uint_t) -1; + + 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; + + 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 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; + } + + if (rc == NGX_OK) { + + if (c->error) { + return c->error; + } + + c->temp_file = 1; + test = c->exists ? 1 : 0; + rv = NGX_DECLINED; + + } else { /* rc == NGX_DECLINED */ + + test = cache->sh->cold ? 1 : 0; + + if (c->min_uses > 1) { + + if (!test) { + return NGX_HTTP_CACHE_SCARCE; + } + + rv = NGX_HTTP_CACHE_SCARCE; + + } else { + c->temp_file = 1; + 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) +{ + u_char *p; + time_t now; + ssize_t n; + ngx_str_t *key; + ngx_int_t rc; + ngx_uint_t i; + 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 || (size_t) h->header_start != c->header_start) { + ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0, + "cache file \"%s\" has md5 collision", c->file.name.data); + return NGX_DECLINED; + } + + p = c->buf->pos + sizeof(ngx_http_file_cache_header_t) + + sizeof(ngx_http_file_cache_key); + + key = c->keys.elts; + for (i = 0; i < c->keys.nelts; i++) { + if (ngx_memcmp(p, key[i].data, key[i].len) != 0) { + ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0, + "cache file \"%s\" has md5 collision", + c->file.name.data); + return NGX_DECLINED; + } + + p += key[i].len; + } + + 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->updating_sec = h->updating_sec; + c->error_sec = h->error_sec; + c->last_modified = h->last_modified; + c->date = h->date; + c->valid_msec = h->valid_msec; + 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) { + c->stale_updating = c->valid_sec + c->updating_sec >= now; + c->stale_error = c->valid_sec + c->error_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 || NGX_THREADS) + ssize_t n; + ngx_http_core_loc_conf_t *clcf; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); +#endif + +#if (NGX_HAVE_FILE_AIO) + + if (clcf->aio == NGX_HTTP_AIO_ON && ngx_file_aio) { + 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; + } + +#endif + +#if (NGX_THREADS) + + if (clcf->aio == NGX_HTTP_AIO_THREADS) { + c->file.thread_task = c->thread_task; + c->file.thread_handler = ngx_http_cache_thread_handler; + c->file.thread_ctx = r; + + n = ngx_thread_read(&c->file, c->buf->pos, c->body_start, 0, r->pool); + + c->thread_task = c->file.thread_task; + c->reading = (n == NGX_AGAIN); + + return n; + } + +#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 + + +#if (NGX_THREADS) + +static ngx_int_t +ngx_http_cache_thread_handler(ngx_thread_task_t *task, ngx_file_t *file) +{ + ngx_str_t name; + ngx_thread_pool_t *tp; + ngx_http_request_t *r; + ngx_http_core_loc_conf_t *clcf; + + r = file->thread_ctx; + + clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); + tp = clcf->thread_pool; + + if (tp == NULL) { + if (ngx_http_complex_value(r, clcf->thread_pool_value, &name) + != NGX_OK) + { + return NGX_ERROR; + } + + tp = ngx_thread_pool_get((ngx_cycle_t *) ngx_cycle, &name); + + if (tp == NULL) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "thread pool \"%V\" not found", &name); + return NGX_ERROR; + } + } + + task->event.data = r; + task->event.handler = ngx_http_cache_thread_event_handler; + + if (ngx_thread_task_post(tp, task) != NGX_OK) { + return NGX_ERROR; + } + + r->main->blocked++; + r->aio = 1; + + return NGX_OK; +} + + +static void +ngx_http_cache_thread_event_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 thread: \"%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_http_file_cache_set_watermark(cache); + + 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; + } + } + + cache->sh->count++; + + 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; + } + + /* node_key == node->key */ + + 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; + } + + /* not found */ + + 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 { /* node->key == temp->key */ + + 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; /* void */ ; 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; + } + + /* normalize spaces */ + + 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->updating_sec = c->updating_sec; + h->error_sec = c->error_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) { + /* should not happen */ + 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; + } + + /* + * if the variant hash doesn't match one we used as a secondary + * cache key, switch back to the original key + */ + + 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->error = 0; + 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; + + /* cache file may have been deleted */ + + 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; + } + + /* + * make sure cache file wasn't replaced; + * if it was, do nothing + */ + + 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 + || (size_t) h.header_start != c->header_start + || (size_t) 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; + } + + /* + * update cache file header with new data, + * notably h.valid_sec and h.date + */ + + ngx_memzero(&h, sizeof(ngx_http_file_cache_header_t)); + + h.version = NGX_HTTP_CACHE_VERSION; + h.valid_sec = c->valid_sec; + h.updating_sec = c->updating_sec; + h.error_sec = c->error_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) { + /* should not happen */ + 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); + } + + /* we need to allocate all before the header would be sent */ + + 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); + cache->sh->count--; + 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 && !c->background) { + 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_msec_t elapsed; + 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); + goto next; + } + + 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); + + /* + * abnormally exited workers may leave locked cache entries, + * and although it may be safe to remove them completely, + * we prefer to just move them to the top of the inactive queue + */ + + 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", + (size_t) 2 * NGX_HTTP_CACHE_KEY_LEN, key, fcn->count); + +next: + + if (++cache->files >= cache->manager_files) { + wait = 0; + break; + } + + ngx_time_update(); + + elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last)); + + if (elapsed >= cache->manager_threshold) { + wait = 0; + break; + } + } + + 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); + cache->sh->count--; + } +} + + +static ngx_msec_t +ngx_http_file_cache_manager(void *data) +{ + ngx_http_file_cache_t *cache = data; + + off_t size; + time_t wait; + ngx_msec_t elapsed, next; + ngx_uint_t count, watermark; + + cache->last = ngx_current_msec; + cache->files = 0; + + next = (ngx_msec_t) ngx_http_file_cache_expire(cache) * 1000; + + if (next == 0) { + next = cache->manager_sleep; + goto done; + } + + for ( ;; ) { + ngx_shmtx_lock(&cache->shpool->mutex); + + size = cache->sh->size; + count = cache->sh->count; + watermark = cache->sh->watermark; + + ngx_shmtx_unlock(&cache->shpool->mutex); + + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, + "http file cache size: %O c:%ui w:%i", + size, count, (ngx_int_t) watermark); + + if (size < cache->max_size && count < watermark) { + break; + } + + wait = ngx_http_file_cache_forced_expire(cache); + + if (wait > 0) { + next = (ngx_msec_t) wait * 1000; + break; + } + + if (ngx_quit || ngx_terminate) { + break; + } + + if (++cache->files >= cache->manager_files) { + next = cache->manager_sleep; + break; + } + + ngx_time_update(); + + elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last)); + + if (elapsed >= cache->manager_threshold) { + next = cache->manager_sleep; + break; + } + } + +done: + + elapsed = ngx_abs((ngx_msec_int_t) (ngx_current_msec - cache->last)); + + ngx_log_debug3(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, + "http file cache manager: %ui e:%M n:%M", + cache->files, elapsed, next); + + 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; + } + + /* + * Temporary files in cache have a suffix consisting of a dot + * followed by 10 digits. + */ + + if (name->len >= 2 * NGX_HTTP_CACHE_KEY_LEN + 1 + 10 + && name->data[name->len - 10 - 1] == '.') + { + return NGX_OK; + } + + 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_http_file_cache_set_watermark(cache); + + if (cache->fail_time != ngx_time()) { + cache->fail_time = ngx_time(); + ngx_log_error(NGX_LOG_ALERT, ngx_cycle->log, 0, + "could not allocate node%s", cache->shpool->log_ctx); + } + + ngx_shmtx_unlock(&cache->shpool->mutex); + return NGX_ERROR; + } + + cache->sh->count++; + + 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; +} + + +static void +ngx_http_file_cache_set_watermark(ngx_http_file_cache_t *cache) +{ + cache->sh->watermark = cache->sh->count - cache->sh->count / 8; + + ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ngx_cycle->log, 0, + "http file cache watermark: %ui", cache->sh->watermark); +} + + +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; + ssize_t size; + ngx_str_t s, name, *value; + ngx_int_t loader_files, manager_files; + ngx_msec_t loader_sleep, manager_sleep, loader_threshold, + manager_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; + + manager_files = 100; + manager_sleep = 50; + manager_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 < NGX_MAX_PATH_LEVEL && 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 < NGX_MAX_PATH_LEVEL - 1 && p < last) { + continue; + } + + goto invalid_levels; + } + + goto invalid_levels; + } + + if (cache->path->len < 10 + NGX_MAX_PATH_LEVEL) { + 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; + } + + if (ngx_strncmp(value[i].data, "manager_files=", 14) == 0) { + + manager_files = ngx_atoi(value[i].data + 14, value[i].len - 14); + if (manager_files == NGX_ERROR) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "invalid manager_files value \"%V\"", &value[i]); + return NGX_CONF_ERROR; + } + + continue; + } + + if (ngx_strncmp(value[i].data, "manager_sleep=", 14) == 0) { + + s.len = value[i].len - 14; + s.data = value[i].data + 14; + + manager_sleep = ngx_parse_time(&s, 0); + if (manager_sleep == (ngx_msec_t) NGX_ERROR) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "invalid manager_sleep value \"%V\"", &value[i]); + return NGX_CONF_ERROR; + } + + continue; + } + + if (ngx_strncmp(value[i].data, "manager_threshold=", 18) == 0) { + + s.len = value[i].len - 18; + s.data = value[i].data + 18; + + manager_threshold = ngx_parse_time(&s, 0); + if (manager_threshold == (ngx_msec_t) NGX_ERROR) { + ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, + "invalid manager_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; + cache->manager_files = manager_files; + cache->manager_sleep = manager_sleep; + cache->manager_threshold = manager_threshold; + + if (ngx_add_path(cf, &cache->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->use_temp_path = use_temp_path; + + 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; +} |