|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
|
4 */
|
|
|
5
|
|
|
6
|
|
|
7 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
|
|
|
8 #define _NGX_HTTP_CACHE_H_INCLUDED_
|
|
|
9
|
|
|
10
|
|
|
11 #include <ngx_config.h>
|
|
|
12 #include <ngx_core.h>
|
|
|
13 #include <ngx_http.h>
|
|
|
14
|
|
|
15
|
|
|
16 /*
|
|
18
|
17 * The 3 bits allows the 7 uses before the cache entry allocation.
|
|
0
|
18 * We can use maximum 7 bits, i.e up to the 127 uses.
|
|
|
19 */
|
|
|
20 #define NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS 3
|
|
|
21
|
|
18
|
22
|
|
0
|
23 typedef struct {
|
|
|
24 uint32_t crc;
|
|
|
25 ngx_str_t key;
|
|
|
26 time_t accessed;
|
|
|
27
|
|
|
28 unsigned refs:20; /* 1048576 references */
|
|
|
29
|
|
|
30 unsigned count:NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS;
|
|
|
31
|
|
|
32 unsigned deleted:1;
|
|
|
33 unsigned expired:1;
|
|
|
34 unsigned memory:1;
|
|
|
35 unsigned mmap:1;
|
|
|
36 unsigned notify:1;
|
|
|
37
|
|
|
38 ngx_fd_t fd;
|
|
|
39 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
|
|
|
40 ngx_file_uniq_t uniq; /* no needed with kqueue */
|
|
|
41 #endif
|
|
|
42 time_t last_modified;
|
|
|
43 time_t updated;
|
|
|
44
|
|
|
45 union {
|
|
|
46 off_t size;
|
|
|
47 ngx_str_t value;
|
|
|
48 } data;
|
|
18
|
49 } ngx_http_cache_entry_t;
|
|
0
|
50
|
|
|
51
|
|
|
52 typedef struct {
|
|
|
53 time_t expires;
|
|
|
54 time_t last_modified;
|
|
|
55 time_t date;
|
|
|
56 off_t length;
|
|
|
57 size_t key_len;
|
|
|
58 char key[1];
|
|
|
59 } ngx_http_cache_header_t;
|
|
|
60
|
|
|
61
|
|
|
62 #define NGX_HTTP_CACHE_HASH 7
|
|
|
63 #define NGX_HTTP_CACHE_NELTS 4
|
|
|
64
|
|
|
65 typedef struct {
|
|
18
|
66 ngx_http_cache_entry_t *elts;
|
|
0
|
67 size_t hash;
|
|
|
68 size_t nelts;
|
|
|
69 time_t life;
|
|
|
70 time_t update;
|
|
|
71 #if (NGX_THREADS)
|
|
|
72 ngx_mutex_t mutex;
|
|
|
73 #endif
|
|
|
74 ngx_pool_t *pool;
|
|
|
75 } ngx_http_cache_hash_t;
|
|
|
76
|
|
|
77
|
|
|
78 typedef struct {
|
|
|
79 ngx_http_cache_hash_t *hash;
|
|
18
|
80 ngx_http_cache_entry_t *cache;
|
|
0
|
81 ngx_file_t file;
|
|
18
|
82 ngx_array_t key;
|
|
0
|
83 uint32_t crc;
|
|
|
84 u_char md5[16];
|
|
|
85 ngx_path_t *path;
|
|
|
86 ngx_buf_t *buf;
|
|
|
87 time_t expires;
|
|
|
88 time_t last_modified;
|
|
|
89 time_t date;
|
|
|
90 off_t length;
|
|
26
|
91 size_t key_len;
|
|
0
|
92 size_t file_start;
|
|
26
|
93 ngx_file_uniq_t uniq;
|
|
0
|
94 ngx_log_t *log;
|
|
18
|
95
|
|
|
96 /* STUB */
|
|
26
|
97 ssize_t header_size;
|
|
18
|
98 ngx_str_t key0;
|
|
|
99 } ngx_http_cache_t;
|
|
0
|
100
|
|
|
101
|
|
22
|
102 typedef struct {
|
|
26
|
103 ngx_path_t *path;
|
|
22
|
104 ngx_str_t key;
|
|
26
|
105 ngx_buf_t *buf;
|
|
|
106
|
|
|
107 unsigned file:1;
|
|
|
108 unsigned memory:1;
|
|
|
109 unsigned primary:1;
|
|
22
|
110 } ngx_http_cache_ctx_t;
|
|
|
111
|
|
0
|
112
|
|
|
113 #define NGX_HTTP_CACHE_STALE 1
|
|
|
114 #define NGX_HTTP_CACHE_AGED 2
|
|
|
115 #define NGX_HTTP_CACHE_THE_SAME 3
|
|
|
116
|
|
|
117
|
|
26
|
118 ngx_int_t ngx_http_cache_get(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx);
|
|
|
119
|
|
|
120 ngx_int_t ngx_http_file_cache_get(ngx_http_request_t *r,
|
|
|
121 ngx_http_cache_ctx_t *ctx);
|
|
|
122
|
|
|
123 ngx_int_t ngx_http_file_cache_open(ngx_http_cache_t *c);
|
|
|
124
|
|
|
125 ngx_int_t ngx_http_cache_cleaner_handler(ngx_gc_t *gc, ngx_str_t *name,
|
|
|
126 ngx_dir_t *dir);
|
|
|
127
|
|
|
128
|
|
18
|
129 #if 0
|
|
|
130
|
|
0
|
131 ngx_http_cache_t *ngx_http_cache_get(ngx_http_cache_hash_t *cache,
|
|
|
132 ngx_http_cleanup_t *cleanup,
|
|
|
133 ngx_str_t *key, uint32_t *crc);
|
|
|
134
|
|
|
135 ngx_http_cache_t *ngx_http_cache_alloc(ngx_http_cache_hash_t *hash,
|
|
|
136 ngx_http_cache_t *cache,
|
|
|
137 ngx_http_cleanup_t *cleanup,
|
|
|
138 ngx_str_t *key, uint32_t crc,
|
|
|
139 ngx_str_t *value, ngx_log_t *log);
|
|
|
140 void ngx_http_cache_free(ngx_http_cache_t *cache,
|
|
|
141 ngx_str_t *key, ngx_str_t *value, ngx_log_t *log);
|
|
|
142 void ngx_http_cache_lock(ngx_http_cache_hash_t *hash, ngx_http_cache_t *cache);
|
|
|
143 void ngx_http_cache_unlock(ngx_http_cache_hash_t *hash,
|
|
|
144 ngx_http_cache_t *cache, ngx_log_t *log);
|
|
|
145
|
|
|
146 int ngx_http_cache_update_file(ngx_http_request_t *r,ngx_http_cache_ctx_t *ctx,
|
|
|
147 ngx_str_t *temp_file);
|
|
|
148
|
|
|
149 int ngx_http_send_cached(ngx_http_request_t *r);
|
|
|
150
|
|
|
151
|
|
|
152 char *ngx_http_set_cache_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
|
|
|
153
|
|
18
|
154 #endif
|
|
|
155
|
|
0
|
156
|
|
|
157 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */
|
