| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| typedef struct { |
| ngx_http_cache_hash_t *redirect_cache; |
| } ngx_http_static_loc_conf_t; |
| |
| |
| static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r); |
| static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf); |
| static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf, |
| void *parent, void *child); |
| static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle); |
| |
| |
| static ngx_command_t ngx_http_static_commands[] = { |
| |
| #if (NGX_HTTP_CACHE) |
| |
| { ngx_string("redirect_cache"), |
| NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE3, |
| ngx_http_set_cache_slot, |
| NGX_HTTP_LOC_CONF_OFFSET, |
| offsetof(ngx_http_static_loc_conf_t, redirect_cache), |
| NULL }, |
| |
| #endif |
| |
| ngx_null_command |
| }; |
| |
| |
| |
| ngx_http_module_t ngx_http_static_module_ctx = { |
| NULL, /* pre conf */ |
| |
| NULL, /* create main configuration */ |
| NULL, /* init main configuration */ |
| |
| NULL, /* create server configuration */ |
| NULL, /* merge server configuration */ |
| |
| ngx_http_static_create_loc_conf, /* create location configuration */ |
| ngx_http_static_merge_loc_conf /* merge location configuration */ |
| }; |
| |
| |
| ngx_module_t ngx_http_static_module = { |
| NGX_MODULE, |
| &ngx_http_static_module_ctx, /* module context */ |
| ngx_http_static_commands, /* module directives */ |
| NGX_HTTP_MODULE, /* module type */ |
| ngx_http_static_init, /* init module */ |
| NULL /* init child */ |
| }; |
| |
| |
| static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r) |
| { |
| u_char *last; |
| ngx_fd_t fd; |
| ngx_int_t rc; |
| ngx_uint_t level; |
| ngx_str_t name, location; |
| ngx_err_t err; |
| ngx_log_t *log; |
| ngx_buf_t *b; |
| ngx_chain_t out; |
| ngx_file_info_t fi; |
| ngx_http_cleanup_t *file_cleanup, *redirect_cleanup; |
| ngx_http_log_ctx_t *ctx; |
| ngx_http_core_loc_conf_t *clcf; |
| ngx_http_static_loc_conf_t *slcf; |
| #if (NGX_HTTP_CACHE) |
| uint32_t file_crc, redirect_crc; |
| ngx_http_cache_t *file, *redirect; |
| #endif |
| |
| if (r->uri.data[r->uri.len - 1] == '/') { |
| return NGX_DECLINED; |
| } |
| |
| if (r->method != NGX_HTTP_GET && r->method != NGX_HTTP_HEAD) { |
| return NGX_HTTP_NOT_ALLOWED; |
| } |
| |
| rc = ngx_http_discard_body(r); |
| |
| if (rc != NGX_OK && rc != NGX_AGAIN) { |
| return rc; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| /* |
| * there is a valid cached open file, i.e by the index handler, |
| * and it should be already registered in r->cleanup |
| */ |
| |
| if (r->cache && !r->cache->expired) { |
| return ngx_http_send_cached(r); |
| } |
| |
| #endif |
| |
| log = r->connection->log; |
| |
| clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
| |
| /* |
| * make a file name, reserve 2 bytes for a trailing '/' |
| * in a possible redirect and for the last '\0' |
| */ |
| |
| if (clcf->alias) { |
| name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2 |
| - clcf->name.len); |
| if (name.data == NULL) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len); |
| last = ngx_cpystrn(last, r->uri.data + clcf->name.len, |
| r->uri.len + 1 - clcf->name.len); |
| |
| name.len = last - name.data; |
| |
| location.data = ngx_palloc(r->pool, r->uri.len + 2); |
| if (location.data == NULL) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1); |
| |
| #if 0 |
| /* |
| * aliases usually have trailling "/", |
| * set it in the start of the possible redirect |
| */ |
| |
| if (*location.data != '/') { |
| location.data--; |
| } |
| #endif |
| |
| location.len = last - location.data + 1; |
| |
| } else { |
| name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2); |
| if (name.data == NULL) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| location.data = ngx_cpymem(name.data, clcf->root.data, clcf->root.len); |
| last = ngx_cpystrn(location.data, r->uri.data, r->uri.len + 1); |
| |
| name.len = last - name.data; |
| location.len = last - location.data + 1; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "http filename: \"%s\"", name.data); |
| |
| |
| /* allocate cleanups */ |
| |
| if (!(file_cleanup = ngx_push_array(&r->cleanup))) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| file_cleanup->valid = 0; |
| |
| slcf = ngx_http_get_module_loc_conf(r, ngx_http_static_module); |
| if (slcf->redirect_cache) { |
| if (!(redirect_cleanup = ngx_push_array(&r->cleanup))) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| redirect_cleanup->valid = 0; |
| |
| } else { |
| redirect_cleanup = NULL; |
| } |
| |
| #if (NGX_HTTP_CACHE) |
| |
| /* look up an open files cache */ |
| |
| if (clcf->open_files) { |
| file = ngx_http_cache_get(clcf->open_files, file_cleanup, |
| &name, &file_crc); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "http open file cache get: %p", file); |
| |
| if (file && !file->expired) { |
| r->cache = file; |
| return ngx_http_send_cached(r); |
| } |
| |
| } else { |
| file = NULL; |
| } |
| |
| |
| /* look up an redirect cache */ |
| |
| if (slcf->redirect_cache) { |
| redirect = ngx_http_cache_get(slcf->redirect_cache, redirect_cleanup, |
| &name, &redirect_crc); |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "http redirect cache get: %p", redirect); |
| |
| if (redirect && !redirect->expired) { |
| |
| /* |
| * We do not copy a cached value so the cache entry is locked |
| * until the end of the request. In a single threaded model |
| * the redirected request should complete before other event |
| * will be processed. In a multithreaded model this locking |
| * should keep more popular redirects in cache. |
| */ |
| |
| if (!(r->headers_out.location = |
| ngx_http_add_header(&r->headers_out, ngx_http_headers_out))) |
| { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| r->headers_out.location->value = redirect->data.value; |
| |
| return NGX_HTTP_MOVED_PERMANENTLY; |
| } |
| |
| } else { |
| redirect = NULL; |
| } |
| |
| #endif |
| |
| /* open file */ |
| |
| #if (NGX_WIN9X) |
| |
| /* TODO: redirect cache */ |
| |
| if (ngx_win32_version < NGX_WIN_NT) { |
| |
| /* |
| * there is no way to open a file or a directory in Win9X with |
| * one syscall because Win9X has no FILE_FLAG_BACKUP_SEMANTICS flag |
| * so we need to check its type before the opening |
| */ |
| |
| if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) { |
| err = ngx_errno; |
| ngx_log_error(NGX_LOG_ERR, log, err, |
| ngx_file_info_n " \"%s\" failed", name.data); |
| |
| if (err == NGX_ENOENT || err == NGX_ENOTDIR) { |
| return NGX_HTTP_NOT_FOUND; |
| |
| } else if (err == NGX_EACCES) { |
| return NGX_HTTP_FORBIDDEN; |
| |
| } else { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| } |
| |
| if (ngx_is_dir(&fi)) { |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "HTTP DIR: \"%s\"", name.data); |
| |
| if (!(r->headers_out.location = |
| ngx_http_add_header(&r->headers_out, ngx_http_headers_out))) |
| { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| *last++ = '/'; |
| *last = '\0'; |
| r->headers_out.location->value.len = last - location; |
| r->headers_out.location->value.data = location; |
| |
| return NGX_HTTP_MOVED_PERMANENTLY; |
| } |
| } |
| |
| #endif |
| |
| |
| fd = ngx_open_file(name.data, NGX_FILE_RDONLY, NGX_FILE_OPEN); |
| |
| if (fd == NGX_INVALID_FILE) { |
| err = ngx_errno; |
| |
| if (err == NGX_ENOENT || err == NGX_ENOTDIR) { |
| level = NGX_LOG_ERR; |
| rc = NGX_HTTP_NOT_FOUND; |
| |
| } else if (err == NGX_EACCES) { |
| level = NGX_LOG_ERR; |
| rc = NGX_HTTP_FORBIDDEN; |
| |
| } else { |
| level = NGX_LOG_CRIT; |
| rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| ngx_log_error(level, log, err, |
| ngx_open_file_n " \"%s\" failed", name.data); |
| |
| return rc; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", fd); |
| |
| if (ngx_fd_info(fd, &fi) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, |
| ngx_fd_info_n " \"%s\" failed", name.data); |
| |
| if (ngx_close_file(fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", name.data); |
| } |
| |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (ngx_is_dir(&fi)) { |
| |
| ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir"); |
| |
| if (ngx_close_file(fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", name.data); |
| } |
| |
| *last++ = '/'; |
| *last = '\0'; |
| |
| r->headers_out.location = ngx_list_push(&r->headers_out.headers); |
| if (r->headers_out.location == NULL) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| r->headers_out.location->value = location; |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (slcf->redirect_cache) { |
| if (redirect) { |
| if (location.len == redirect->data.value.len |
| && ngx_memcmp(redirect->data.value.data, location.data, |
| location.len) == 0) |
| { |
| redirect->accessed = ngx_cached_time; |
| redirect->updated = ngx_cached_time; |
| |
| /* |
| * we can unlock the cache entry because |
| * we have the local copy anyway |
| */ |
| |
| ngx_http_cache_unlock(slcf->redirect_cache, redirect, log); |
| redirect_cleanup->valid = 0; |
| |
| return NGX_HTTP_MOVED_PERMANENTLY; |
| } |
| } |
| |
| location.len++; |
| redirect = ngx_http_cache_alloc(slcf->redirect_cache, redirect, |
| redirect_cleanup, |
| &name, redirect_crc, |
| &location, log); |
| location.len--; |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "http redirect cache alloc: %p", redirect); |
| |
| if (redirect) { |
| redirect->fd = NGX_INVALID_FILE; |
| redirect->accessed = ngx_cached_time; |
| redirect->last_modified = 0; |
| redirect->updated = ngx_cached_time; |
| redirect->memory = 1; |
| ngx_http_cache_unlock(slcf->redirect_cache, redirect, log); |
| redirect_cleanup->valid = 0; |
| } |
| |
| } |
| |
| #endif |
| |
| return NGX_HTTP_MOVED_PERMANENTLY; |
| } |
| |
| #if !(NGX_WIN32) /* the not regular files are probably Unix specific */ |
| |
| if (!ngx_is_file(&fi)) { |
| ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, |
| "\"%s\" is not a regular file", name.data); |
| |
| if (ngx_close_file(fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", name.data); |
| } |
| |
| return NGX_HTTP_NOT_FOUND; |
| } |
| |
| #endif |
| |
| |
| #if (NGX_HTTP_CACHE) |
| |
| if (clcf->open_files) { |
| |
| #if (NGX_USE_HTTP_FILE_CACHE_UNIQ) |
| |
| if (file && file->uniq == ngx_file_uniq(&fi)) { |
| if (ngx_close_file(fd) == NGX_FILE_ERROR) { |
| ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
| ngx_close_file_n " \"%s\" failed", name.data); |
| } |
| file->accessed = ngx_cached_time; |
| file->updated = ngx_cached_time; |
| file->expired = 0; |
| r->cache = file; |
| |
| return ngx_http_send_cached(r); |
| |
| } else { |
| if (file) { |
| ngx_http_cache_unlock(clcf->open_files, file, log); |
| file = NULL; |
| } |
| |
| file = ngx_http_cache_alloc(clcf->open_files, file, |
| file_cleanup, |
| &name, file_crc, NULL, log); |
| if (file) { |
| file->uniq = ngx_file_uniq(&fi); |
| } |
| } |
| |
| #else |
| file = ngx_http_cache_alloc(clcf->open_files, file, |
| file_cleanup, |
| &name, file_crc, NULL, log); |
| #endif |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
| "http open file cache alloc: %p", file); |
| |
| if (file) { |
| file->fd = fd; |
| file->data.size = ngx_file_size(&fi); |
| file->accessed = ngx_cached_time; |
| file->last_modified = ngx_file_mtime(&fi); |
| file->updated = ngx_cached_time; |
| r->cache = file; |
| } |
| |
| return ngx_http_send_cached(r); |
| } |
| |
| #endif |
| |
| ctx = log->data; |
| ctx->action = "sending response to client"; |
| |
| file_cleanup->data.file.fd = fd; |
| file_cleanup->data.file.name = name.data; |
| file_cleanup->valid = 1; |
| file_cleanup->cache = 0; |
| |
| r->headers_out.status = NGX_HTTP_OK; |
| r->headers_out.content_length_n = ngx_file_size(&fi); |
| r->headers_out.last_modified_time = ngx_file_mtime(&fi); |
| |
| if (r->headers_out.content_length_n == 0) { |
| r->header_only = 1; |
| } |
| |
| if (ngx_http_set_content_type(r) != NGX_OK) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| #if (NGX_SUPPRESS_WARN) |
| b = NULL; |
| #endif |
| |
| if (!r->header_only) { |
| /* we need to allocate all before the header would be sent */ |
| |
| if (!(b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)))) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| if (!(b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)))) { |
| return NGX_HTTP_INTERNAL_SERVER_ERROR; |
| } |
| |
| r->filter_allow_ranges = 1; |
| } |
| |
| rc = ngx_http_send_header(r); |
| |
| if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { |
| return rc; |
| } |
| |
| b->in_file = 1; |
| |
| if (!r->main) { |
| b->last_buf = 1; |
| } |
| |
| b->file_pos = 0; |
| b->file_last = ngx_file_size(&fi); |
| |
| b->file->fd = fd; |
| b->file->name = name; |
| b->file->log = log; |
| |
| out.buf = b; |
| out.next = NULL; |
| |
| return ngx_http_output_filter(r, &out); |
| } |
| |
| |
| static void *ngx_http_static_create_loc_conf(ngx_conf_t *cf) |
| { |
| ngx_http_static_loc_conf_t *conf; |
| |
| if (!(conf = ngx_palloc(cf->pool, sizeof(ngx_http_static_loc_conf_t)))) { |
| return NGX_CONF_ERROR; |
| } |
| |
| conf->redirect_cache = NULL; |
| |
| return conf; |
| } |
| |
| |
| static char *ngx_http_static_merge_loc_conf(ngx_conf_t *cf, |
| void *parent, void *child) |
| { |
| ngx_http_static_loc_conf_t *prev = parent; |
| ngx_http_static_loc_conf_t *conf = child; |
| |
| if (conf->redirect_cache == NULL) { |
| conf->redirect_cache = prev->redirect_cache; |
| } |
| |
| return NGX_CONF_OK; |
| } |
| |
| |
| static ngx_int_t ngx_http_static_init(ngx_cycle_t *cycle) |
| { |
| ngx_http_handler_pt *h; |
| ngx_http_core_main_conf_t *cmcf; |
| |
| cmcf = ngx_http_cycle_get_module_main_conf(cycle, ngx_http_core_module); |
| |
| h = ngx_push_array(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); |
| if (h == NULL) { |
| return NGX_ERROR; |
| } |
| |
| *h = ngx_http_static_handler; |
| |
| return NGX_OK; |
| } |
