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