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108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
#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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typedef struct {
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uint32_t crc;
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ngx_str_t key;
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time_t accessed;
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unsigned refs:20; /* 1048576 references */
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unsigned count:2; /* lazy allocation: the 4 uses */
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unsigned deleted:1;
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ngx_fd_t fd;
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time_t last_modified;
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time_t updated;
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union {
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off_t size;
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ngx_str_t value;
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} data;
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} ngx_http_cache_t;
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typedef struct {
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time_t expires;
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time_t last_modified;
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time_t date;
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off_t length;
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size_t key_len;
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char key[1];
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} ngx_http_cache_header_t;
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#define NGX_HTTP_CACHE_HASH 7
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#define NGX_HTTP_CACHE_NELTS 4
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typedef struct {
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ngx_http_cache_t *elts;
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size_t hash;
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size_t nelts;
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time_t life;
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time_t update;
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ngx_pool_t *pool;
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} ngx_http_cache_hash_t;
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typedef struct {
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ngx_http_cache_hash_t *hash;
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ngx_http_cache_t *cache;
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ngx_file_t file;
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ngx_str_t key;
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uint32_t crc;
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u_char md5[16];
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ngx_path_t *path;
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ngx_hunk_t *buf;
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time_t expires;
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time_t last_modified;
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time_t date;
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off_t length;
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ssize_t header_size;
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size_t file_start;
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ngx_log_t *log;
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} ngx_http_cache_ctx_t;
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typedef struct {
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ngx_http_cache_hash_t *open_files;
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} ngx_http_cache_conf_t;
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#define NGX_HTTP_CACHE_STALE 1
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#define NGX_HTTP_CACHE_AGED 2
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#define NGX_HTTP_CACHE_THE_SAME 3
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int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx);
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int ngx_http_cache_open_file(ngx_http_cache_ctx_t *ctx, ngx_file_uniq_t uniq);
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int ngx_http_cache_update_file(ngx_http_request_t *r,ngx_http_cache_ctx_t *ctx,
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ngx_str_t *temp_file);
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ngx_http_cache_t *ngx_http_cache_get(ngx_http_cache_hash_t *cache,
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ngx_str_t *key, uint32_t *crc);
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ngx_http_cache_t *ngx_http_cache_alloc(ngx_http_cache_hash_t *cache,
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ngx_str_t *key, uint32_t crc,
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ngx_log_t *log);
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void ngx_http_cache_unlock(ngx_http_cache_hash_t *hash,
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ngx_http_cache_t *cache, ngx_log_t *log);
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int ngx_garbage_collector_http_cache_handler(ngx_gc_t *gc, ngx_str_t *name,
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ngx_dir_t *dir);
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char *ngx_http_set_cache_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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extern ngx_module_t ngx_http_cache_module;
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#endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */
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