| |
| /* |
| * Copyright (C) Igor Sysoev |
| */ |
| |
| |
| #ifndef _NGX_HTTP_CACHE_H_INCLUDED_ |
| #define _NGX_HTTP_CACHE_H_INCLUDED_ |
| |
| |
| #include <ngx_config.h> |
| #include <ngx_core.h> |
| #include <ngx_http.h> |
| |
| |
| #define NGX_HTTP_CACHE_MISS 1 |
| #define NGX_HTTP_CACHE_EXPIRED 2 |
| #define NGX_HTTP_CACHE_STALE 3 |
| #define NGX_HTTP_CACHE_UPDATING 4 |
| #define NGX_HTTP_CACHE_HIT 5 |
| #define NGX_HTTP_CACHE_SCARCE 6 |
| |
| #define NGX_HTTP_CACHE_KEY_LEN 16 |
| |
| |
| typedef struct { |
| ngx_uint_t status; |
| time_t valid; |
| } ngx_http_cache_valid_t; |
| |
| |
| typedef struct { |
| ngx_rbtree_node_t node; |
| ngx_queue_t queue; |
| |
| u_char key[NGX_HTTP_CACHE_KEY_LEN |
| - sizeof(ngx_rbtree_key_t)]; |
| |
| unsigned count:20; |
| unsigned uses:10; |
| unsigned valid_msec:10; |
| unsigned error:10; |
| unsigned exists:1; |
| unsigned updating:1; |
| /* 12 unused bits */ |
| |
| ngx_file_uniq_t uniq; |
| time_t expire; |
| time_t valid_sec; |
| size_t body_start; |
| off_t length; |
| } ngx_http_file_cache_node_t; |
| |
| |
| struct ngx_http_cache_s { |
| ngx_file_t file; |
| ngx_array_t keys; |
| uint32_t crc32; |
| u_char key[NGX_HTTP_CACHE_KEY_LEN]; |
| |
| ngx_file_uniq_t uniq; |
| time_t valid_sec; |
| time_t last_modified; |
| time_t date; |
| |
| size_t header_start; |
| size_t body_start; |
| off_t length; |
| |
| ngx_uint_t min_uses; |
| ngx_uint_t error; |
| ngx_uint_t valid_msec; |
| |
| ngx_buf_t *buf; |
| |
| ngx_http_file_cache_t *file_cache; |
| ngx_http_file_cache_node_t *node; |
| |
| unsigned updated:1; |
| unsigned exists:1; |
| unsigned temp_file:1; |
| }; |
| |
| |
| typedef struct { |
| time_t valid_sec; |
| time_t last_modified; |
| time_t date; |
| uint32_t crc32; |
| u_short valid_msec; |
| u_short header_start; |
| u_short body_start; |
| } ngx_http_file_cache_header_t; |
| |
| |
| typedef struct { |
| ngx_rbtree_t rbtree; |
| ngx_rbtree_node_t sentinel; |
| ngx_queue_t queue; |
| ngx_atomic_t cold; |
| ngx_atomic_t loading; |
| off_t size; |
| } ngx_http_file_cache_sh_t; |
| |
| |
| struct ngx_http_file_cache_s { |
| ngx_http_file_cache_sh_t *sh; |
| ngx_slab_pool_t *shpool; |
| |
| ngx_path_t *path; |
| |
| off_t max_size; |
| size_t bsize; |
| |
| time_t inactive; |
| |
| ngx_msec_t last; |
| ngx_uint_t files; |
| |
| ngx_shm_zone_t *shm_zone; |
| }; |
| |
| |
| void ngx_http_file_cache_create_key(ngx_http_request_t *r); |
| ngx_int_t ngx_http_file_cache_open(ngx_http_request_t *r); |
| void ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf); |
| void ngx_http_file_cache_update(ngx_http_request_t *r, ngx_temp_file_t *tf); |
| ngx_int_t ngx_http_cache_send(ngx_http_request_t *); |
| void ngx_http_file_cache_free(ngx_http_request_t *r, ngx_temp_file_t *tf); |
| time_t ngx_http_file_cache_valid(ngx_array_t *cache_valid, ngx_uint_t status); |
| |
| char *ngx_http_file_cache_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| char *ngx_http_file_cache_valid_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
| void *conf); |
| |
| extern ngx_str_t ngx_http_cache_status[]; |
| |
| |
| #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */ |