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annotate src/http/ngx_http_cache.c @ 176:c0552e5ab567

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nginx-0.0.1-2003-11-09-23:03:38 import; separate building
author Igor Sysoev <igor@sysoev.ru>
date Sun, 09 Nov 2003 20:03:38 +0000
parents e92c2c647c57
children 2d143372a1ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 #include <ngx_config.h>
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3 #include <ngx_core.h>
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4 #include <ngx_http.h>
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6 #include <md5.h>
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9 int ngx_http_cache_get_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx)
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10 {
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11 MD5_CTX md5;
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13 ctx->header_size = sizeof(ngx_http_cache_header_t) + ctx->key.len + 1;
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15 ctx->file.name.len = ctx->path->name.len + 1 + ctx->path->len + 32;
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16 if (!(ctx->file.name.data = ngx_palloc(r->pool, ctx->file.name.len + 1))) {
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17 return NGX_ERROR;
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18 }
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20 ngx_memcpy(ctx->file.name.data, ctx->path->name.data, ctx->path->name.len);
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22 MD5Init(&md5);
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23 MD5Update(&md5, (u_char *) ctx->key.data, ctx->key.len);
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24 MD5Final(ctx->md5, &md5);
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26 ngx_md5_text(ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len,
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27 ctx->md5);
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29 ngx_log_debug(r->connection->log, "URL: %s, md5: %s" _ ctx->key.data _
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30 ctx->file.name.data + ctx->path->name.len + 1 + ctx->path->len);
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31
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32 ngx_create_hashed_filename(&ctx->file, ctx->path);
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33
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34 ngx_log_debug(r->connection->log, "FILE: %s" _ ctx->file.name.data);
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36 /* TODO: look open files cache */
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38 return ngx_http_cache_open_file(r, ctx, 0);
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39 }
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42 /* TODO: Win32 inode analogy */
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44 int ngx_http_cache_open_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
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45 ngx_file_uniq_t uniq)
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46 {
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47 ssize_t n;
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48 ngx_err_t err;
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49 ngx_http_cache_header_t *h;
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50
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51 ctx->file.fd = ngx_open_file(ctx->file.name.data,
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52 NGX_FILE_RDONLY, NGX_FILE_OPEN);
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54 if (ctx->file.fd == NGX_INVALID_FILE) {
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55 err = ngx_errno;
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56
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57 if (err == NGX_ENOENT || err == NGX_ENOTDIR) {
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58 return NGX_DECLINED;
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59 }
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61 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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62 ngx_open_file_n " \"%s\" failed", ctx->file.name.data);
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63 return NGX_ERROR;
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64 }
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65
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66 if (uniq) {
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67 if (ngx_stat_fd(ctx->file.fd, &ctx->file.info) == NGX_FILE_ERROR) {
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68 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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69 ngx_stat_fd_n " \"%s\" failed", ctx->file.name.data);
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70
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71 return NGX_ERROR;
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72 }
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73
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74 if (ngx_file_uniq(ctx->file.info) == uniq) {
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75 if (ngx_close_file(ctx->file.fd) == NGX_FILE_ERROR) {
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76 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
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77 ngx_close_file_n " \"%s\" failed",
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78 ctx->file.name.data);
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79 }
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80
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81 return NGX_HTTP_CACHE_THE_SAME;
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82 }
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83 }
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84
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85 n = ngx_read_file(&ctx->file, ctx->buf->pos,
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86 ctx->buf->end - ctx->buf->last, 0);
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87
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88 if (n == NGX_ERROR || n == NGX_AGAIN) {
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89 return n;
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90 }
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91
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92 if (n <= ctx->header_size) {
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93 ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
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94 "cache file \"%s\" is too small", ctx->file.name.data);
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95 return NGX_ERROR;
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96 }
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97
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98 h = (ngx_http_cache_header_t *) ctx->buf->pos;
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99 ctx->expires = h->expires;
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100 ctx->last_modified= h->last_modified;
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101 ctx->date = h->date;
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102 ctx->length = h->length;
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103
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104 if (h->key_len != ctx->key.len
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105 || ngx_strncmp(h->key, ctx->key.data, h->key_len) != 0)
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106 {
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107 h->key[h->key_len] = '\0';
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108 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
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109 "md5 collision: \"%s\" and \"%s\"",
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110 h->key, ctx->key.data);
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111 return NGX_DECLINED;
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112 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
113
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
114 ctx->buf->last += n;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
115
174
ea464a6c0581 nginx-0.0.1-2003-11-05-01:12:39 import
Igor Sysoev <igor@sysoev.ru>
parents: 172
diff changeset
116 if (ctx->expires < ngx_time()) {
175
e92c2c647c57 nginx-0.0.1-2003-11-05-20:03:41 import
Igor Sysoev <igor@sysoev.ru>
parents: 174
diff changeset
117 ngx_log_debug(r->connection->log, "EXPIRED");
172
caa57ddf6d77 nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents: 171
diff changeset
118 return NGX_HTTP_CACHE_STALE;
171
aff0e5d32af8 nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents: 170
diff changeset
119 }
aff0e5d32af8 nginx-0.0.1-2003-11-03-20:33:31 import
Igor Sysoev <igor@sysoev.ru>
parents: 170
diff changeset
120
172
caa57ddf6d77 nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents: 171
diff changeset
121 /* TODO: NGX_HTTP_CACHE_AGED */
caa57ddf6d77 nginx-0.0.1-2003-11-04-01:20:44 import
Igor Sysoev <igor@sysoev.ru>
parents: 171
diff changeset
122
170
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
123 return NGX_OK;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
124 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
125
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
126
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
127 int ngx_http_cache_update_file(ngx_http_request_t *r, ngx_http_cache_ctx_t *ctx,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
128 ngx_str_t *temp_file)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
129 {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
130 int retry;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
131 ngx_err_t err;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
132
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
133 retry = 0;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
134
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
135 for ( ;; ) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
136 if (ngx_rename_file(temp_file->data, ctx->file.name.data)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
137 != NGX_FILE_ERROR)
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
138 {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
139 return NGX_OK;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
140 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
141
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
142 err = ngx_errno;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
143
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
144 if (retry || (err != NGX_ENOENT && err != NGX_ENOTDIR)) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
145 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
146 ngx_rename_file_n "(\"%s\", \"%s\") failed",
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
147 temp_file->data, ctx->file.name.data);
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
148
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
149 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
150 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
151
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
152 if (ngx_create_path(&ctx->file, ctx->path) == NGX_ERROR) {
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
153 return NGX_ERROR;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
154 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
155
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
156 retry = 1;
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
157 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
158 }
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
159
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
160
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
161 #if 0
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
162
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
163 /*
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
164 * small file in malloc()ed memory, mmap()ed file, file descriptor only,
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
165 * file access time only (to estimate could pages still be in memory),
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
166 * translated URI (ngx_http_index_hanlder),
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
167 * compiled script (ngx_http_ssi_filter).
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
168 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
169
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
170
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
171 #define NGX_HTTP_CACHE_ENTRY_DELETED 0x00000001
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
172 #define NGX_HTTP_CACHE_ENTRY_MMAPED 0x00000002
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
173
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
174 /* "/" -> "/index.html" in ngx_http_index_handler */
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
175 #define NGX_HTTP_CACHE_ENTRY_URI 0x00000004
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
176
105
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
177 /* 301 location "/dir" -> "dir/" in ngx_http_core_handler */
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
178
00bee6e7b485 nginx-0.0.1-2003-06-15-22:32:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 99
diff changeset
179 /* compiled script in ngx_http_ssi_filter */
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
180 #define NGX_HTTP_CACHE_ENTRY_SCRIPT 0x00000008
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
181
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
182 #define NGX_HTTP_CACHE_FILTER_FLAGS 0xFFFF0000
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
183
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
184
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
185 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
186 ngx_fd_t fd;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
187 off_t size;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
188 void *data;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
189 time_t accessed;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
190 time_t last_modified;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
191 time_t updated; /* no needed with kqueue */
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
192 int refs;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
193 int flags;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
194 } ngx_http_cache_entry_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
195
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
196
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
197 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
198 u_int32_t crc;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
199 ngx_str_t uri;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
200 ngx_http_cache_t *cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
201 } ngx_http_cache_hash_entry_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
202
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
203
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
204 typedef struct {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
205 ngx_http_cache_t *cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
206 u_int32_t crc;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
207 int n;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
208 } ngx_http_cache_handle_t;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
209
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
210
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
211 int ngx_http_cache_get(ngx_http_cache_hash_t *cache_hash,
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
212 ngx_str_t *uri, ngx_http_cache_handle_t *h)
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
213 {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
214 int hi;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
215 ngx_http_cache_hash_entry_t *entry;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
216
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
217 h->crc = ngx_crc(uri->data, uri->len);
97
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
218
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
219 hi = h->crc % cache_hash->size;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
220 entry = cache_hash[hi].elts;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
221
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
222 for (i = 0; i < cache_hash[hi].nelts; i++) {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
223 if (entry[i].crc == crc
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
224 && entry[i].uri.len == uri->len
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
225 && ngx_strncmp(entry[i].uri.data, uri->data, uri->len) == 0
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
226 {
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
227 h->cache = entry[i].cache;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
228 h->cache->refs++;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
229 h->n = hi;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
230 return NGX_OK;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
231 }
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
232 }
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
233
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
234 return NGX_ERROR;
70d2345a903f nginx-0.0.1-2003-05-29-17:02:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
235 }
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
236
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
237
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
238 /* 32-bit crc16 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
239
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
240 int ngx_crc(char *data, size_t len)
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
241 {
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
242 u_int32_t sum;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
243
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
244 for (sum = 0; len; len--) {
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
245 /*
107
b5be4b0448d3 nginx-0.0.1-2003-07-01-19:00:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 105
diff changeset
246 * gcc 2.95.2 x86 and icc 7.1.006 compile that operator
b5be4b0448d3 nginx-0.0.1-2003-07-01-19:00:03 import
Igor Sysoev <igor@sysoev.ru>
parents: 105
diff changeset
247 * into the single rol opcode.
99
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
248 * msvc 6.0sp2 compiles it into four opcodes.
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
249 */
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
250 sum = sum >> 1 | sum << 31;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
251
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
252 sum += *data++;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
253 }
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
254
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
255 return sum;
a059e1aa65d4 nginx-0.0.1-2003-06-02-19:24:30 import
Igor Sysoev <igor@sysoev.ru>
parents: 97
diff changeset
256 }
170
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
257
c42be4185301 nginx-0.0.1-2003-11-03-01:56:18 import
Igor Sysoev <igor@sysoev.ru>
parents: 107
diff changeset
258 #endif