Mercurial > hg > nginx

annotate src/http/ngx_http_cache.h @ 647:95d7da23ea53 release-0.3.45

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nginx-0.3.45-RELEASE import *) Feature: the "ssl_verify_client", "ssl_verify_depth", and "ssl_client_certificate" directives. *) Change: the $request_method variable now returns the main request method. *) Change: the ° symbol codes were changed in koi-win conversion table. *) Feature: the euro and N symbols were added to koi-win conversion table. *) Bugfix: if nginx distributed the requests among several backends and some backend failed, then requests intended for this backend was directed to one live backend only instead of being distributed among the rest.
author Igor Sysoev <igor@sysoev.ru>
date Sat, 06 May 2006 16:28:56 +0000
parents ad1e9ebf93bb
children 3a8a53c0c42f
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_HTTP_CACHE_H_INCLUDED_
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8 #define _NGX_HTTP_CACHE_H_INCLUDED_
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_http.h>
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16 /*
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17 * The 3 bits allows the 7 uses before the cache entry allocation.
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18 * We can use maximum 7 bits, i.e up to the 127 uses.
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19 */
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20 #define NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS 3
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23 typedef struct {
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24 uint32_t crc;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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25 ngx_str_t key;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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26 time_t accessed;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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28 unsigned refs:20; /* 1048576 references */
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30 unsigned count:NGX_HTTP_CACHE_LAZY_ALLOCATION_BITS;
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32 unsigned deleted:1;
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33 unsigned expired:1;
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34 unsigned memory:1;
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35 unsigned mmap:1;
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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36 unsigned notify:1;
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37
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38 ngx_fd_t fd;
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39 #if (NGX_USE_HTTP_FILE_CACHE_UNIQ)
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40 ngx_file_uniq_t uniq; /* no needed with kqueue */
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41 #endif
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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42 time_t last_modified;
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43 time_t updated;
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44
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45 union {
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267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
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46 off_t size;
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47 ngx_str_t value;
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48 } data;
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49 } ngx_http_cache_entry_t;
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50
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51
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52 typedef struct {
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c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
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53 time_t expires;
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54 time_t last_modified;
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55 time_t date;
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56 off_t length;
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57 size_t key_len;
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58 char key[1];
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59 } ngx_http_cache_header_t;
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61
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62 #define NGX_HTTP_CACHE_HASH 7
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63 #define NGX_HTTP_CACHE_NELTS 4
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64
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65 typedef struct {
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66 ngx_http_cache_entry_t *elts;
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67 size_t hash;
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68 size_t nelts;
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69 time_t life;
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70 time_t update;
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71 #if (NGX_THREADS)
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72 ngx_mutex_t mutex;
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73 #endif
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74 ngx_pool_t *pool;
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75 } ngx_http_cache_hash_t;
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76
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78 typedef struct {
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79 ngx_http_cache_hash_t *hash;
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80 ngx_http_cache_entry_t *cache;
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81 ngx_file_t file;
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82 ngx_array_t key;
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83 uint32_t crc;
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84 u_char md5[16];
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85 ngx_path_t *path;
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86 ngx_buf_t *buf;
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87 time_t expires;
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88 time_t last_modified;
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89 time_t date;
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90 off_t length;
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91 size_t key_len;
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92 size_t file_start;
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93 ngx_file_uniq_t uniq;
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94 ngx_log_t *log;
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95
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96 /* STUB */
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97 ssize_t header_size;
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98 ngx_str_t key0;
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99 } ngx_http_cache_t;
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100
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101
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102 typedef struct {
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103 ngx_path_t *path;
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104 ngx_str_t key;
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105 ngx_buf_t *buf;
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106
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107 unsigned file:1;
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108 unsigned memory:1;
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109 unsigned primary:1;
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110 } ngx_http_cache_ctx_t;
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111
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112
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113 #define NGX_HTTP_CACHE_STALE 1
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114 #define NGX_HTTP_CACHE_AGED 2
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115 #define NGX_HTTP_CACHE_THE_SAME 3
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116
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117
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118 ngx_int_t ngx_http_cache_get(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx);
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ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
120 ngx_int_t ngx_http_file_cache_get(ngx_http_request_t *r,
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
121 ngx_http_cache_ctx_t *ctx);
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
122
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
123 ngx_int_t ngx_http_file_cache_open(ngx_http_cache_t *c);
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
124
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
125 ngx_int_t ngx_http_cache_cleaner_handler(ngx_gc_t *gc, ngx_str_t *name,
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
126 ngx_dir_t *dir);
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
127
ad1e9ebf93bb nginx-0.1.13-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 473
diff changeset
128
469
2ff194b74f1e nginx-0.1.9-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
129 #if 0
2ff194b74f1e nginx-0.1.9-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
130
201
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
131 ngx_http_cache_t *ngx_http_cache_get(ngx_http_cache_hash_t *cache,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
132 ngx_http_cleanup_t *cleanup,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
133 ngx_str_t *key, uint32_t *crc);
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
134
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
135 ngx_http_cache_t *ngx_http_cache_alloc(ngx_http_cache_hash_t *hash,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
136 ngx_http_cache_t *cache,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
137 ngx_http_cleanup_t *cleanup,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
138 ngx_str_t *key, uint32_t crc,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
139 ngx_str_t *value, ngx_log_t *log);
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
140 void ngx_http_cache_free(ngx_http_cache_t *cache,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
141 ngx_str_t *key, ngx_str_t *value, ngx_log_t *log);
203
c9da5900c79e nginx-0.0.1-2003-12-02-08:47:29 import
Igor Sysoev <igor@sysoev.ru>
parents: 202
diff changeset
142 void ngx_http_cache_lock(ngx_http_cache_hash_t *hash, ngx_http_cache_t *cache);
201
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
143 void ngx_http_cache_unlock(ngx_http_cache_hash_t *hash,
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
144 ngx_http_cache_t *cache, ngx_log_t *log);
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
145
197
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
146 int ngx_http_cache_update_file(ngx_http_request_t *r,ngx_http_cache_ctx_t *ctx,
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
147 ngx_str_t *temp_file);
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
148
201
267ea1d98683 nginx-0.0.1-2003-11-30-23:03:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 200
diff changeset
149 int ngx_http_send_cached(ngx_http_request_t *r);
200
abeaebe0a33c nginx-0.0.1-2003-11-28-20:41:47 import
Igor Sysoev <igor@sysoev.ru>
parents: 199
diff changeset
150
197
0b81c7a0b133 nginx-0.0.1-2003-11-27-10:45:22 import
Igor Sysoev <igor@sysoev.ru>
parents: 195
diff changeset
151
199
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
diff changeset
152 char *ngx_http_set_cache_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
diff changeset
153
469
2ff194b74f1e nginx-0.1.9-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
154 #endif
2ff194b74f1e nginx-0.1.9-RELEASE import
Igor Sysoev <igor@sysoev.ru>
parents: 444
diff changeset
155
199
a65b630b3a66 nginx-0.0.1-2003-11-28-11:40:40 import
Igor Sysoev <igor@sysoev.ru>
parents: 197
diff changeset
156
170
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
157 #endif /* _NGX_HTTP_CACHE_H_INCLUDED_ */