Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_map_module.c @ 8249:90cc7194e993
Upstream: excluded down servers from the next_upstream tries.
Previously, the number of next_upstream tries included servers marked
as "down", resulting in "no live upstreams" with the code 502 instead
of the code derived from an attempt to connect to the last tried "up"
server (ticket #2096).
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Fri, 27 Nov 2020 00:01:20 +0300 |
parents | ec10ce307dc0 |
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rev | line source |
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589 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
589 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
14 ngx_uint_t hash_max_size; | |
15 ngx_uint_t hash_bucket_size; | |
16 } ngx_http_map_conf_t; | |
17 | |
18 | |
19 typedef struct { | |
593 | 20 ngx_hash_keys_arrays_t keys; |
589 | 21 |
22 ngx_array_t *values_hash; | |
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23 #if (NGX_PCRE) |
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24 ngx_array_t regexes; |
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25 #endif |
589 | 26 |
27 ngx_http_variable_value_t *default_value; | |
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28 ngx_conf_t *cf; |
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29 unsigned hostnames:1; |
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30 unsigned no_cacheable:1; |
589 | 31 } ngx_http_map_conf_ctx_t; |
32 | |
33 | |
34 typedef struct { | |
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35 ngx_http_map_t map; |
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36 ngx_http_complex_value_t value; |
589 | 37 ngx_http_variable_value_t *default_value; |
38 ngx_uint_t hostnames; /* unsigned hostnames:1 */ | |
39 } ngx_http_map_ctx_t; | |
40 | |
41 | |
42 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one, | |
43 const void *two); | |
44 static void *ngx_http_map_create_conf(ngx_conf_t *cf); | |
45 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); | |
46 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf); | |
47 | |
48 | |
49 static ngx_command_t ngx_http_map_commands[] = { | |
50 | |
51 { ngx_string("map"), | |
52 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2, | |
53 ngx_http_map_block, | |
54 NGX_HTTP_MAIN_CONF_OFFSET, | |
55 0, | |
56 NULL }, | |
57 | |
58 { ngx_string("map_hash_max_size"), | |
59 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
60 ngx_conf_set_num_slot, | |
61 NGX_HTTP_MAIN_CONF_OFFSET, | |
62 offsetof(ngx_http_map_conf_t, hash_max_size), | |
63 NULL }, | |
64 | |
65 { ngx_string("map_hash_bucket_size"), | |
66 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
67 ngx_conf_set_num_slot, | |
68 NGX_HTTP_MAIN_CONF_OFFSET, | |
69 offsetof(ngx_http_map_conf_t, hash_bucket_size), | |
70 NULL }, | |
71 | |
72 ngx_null_command | |
73 }; | |
74 | |
75 | |
76 static ngx_http_module_t ngx_http_map_module_ctx = { | |
77 NULL, /* preconfiguration */ | |
78 NULL, /* postconfiguration */ | |
79 | |
80 ngx_http_map_create_conf, /* create main configuration */ | |
81 NULL, /* init main configuration */ | |
82 | |
83 NULL, /* create server configuration */ | |
84 NULL, /* merge server configuration */ | |
85 | |
86 NULL, /* create location configuration */ | |
87 NULL /* merge location configuration */ | |
88 }; | |
89 | |
90 | |
91 ngx_module_t ngx_http_map_module = { | |
92 NGX_MODULE_V1, | |
93 &ngx_http_map_module_ctx, /* module context */ | |
94 ngx_http_map_commands, /* module directives */ | |
95 NGX_HTTP_MODULE, /* module type */ | |
96 NULL, /* init master */ | |
97 NULL, /* init module */ | |
98 NULL, /* init process */ | |
99 NULL, /* init thread */ | |
100 NULL, /* exit thread */ | |
101 NULL, /* exit process */ | |
102 NULL, /* exit master */ | |
103 NGX_MODULE_V1_PADDING | |
104 }; | |
105 | |
106 | |
107 static ngx_int_t | |
108 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, | |
109 uintptr_t data) | |
110 { | |
111 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data; | |
112 | |
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113 ngx_str_t val, str; |
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114 ngx_http_complex_value_t *cv; |
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115 ngx_http_variable_value_t *value; |
589 | 116 |
117 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
118 "http map started"); | |
119 | |
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120 if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) { |
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121 return NGX_ERROR; |
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122 } |
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123 |
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124 if (map->hostnames && val.len > 0 && val.data[val.len - 1] == '.') { |
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125 val.len--; |
589 | 126 } |
127 | |
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128 value = ngx_http_map_find(r, &map->map, &val); |
589 | 129 |
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130 if (value == NULL) { |
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131 value = map->default_value; |
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132 } |
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133 |
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134 if (!value->valid) { |
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135 cv = (ngx_http_complex_value_t *) value->data; |
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136 |
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137 if (ngx_http_complex_value(r, cv, &str) != NGX_OK) { |
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138 return NGX_ERROR; |
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139 } |
589 | 140 |
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141 v->valid = 1; |
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142 v->no_cacheable = 0; |
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143 v->not_found = 0; |
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144 v->len = str.len; |
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145 v->data = str.data; |
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146 |
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147 } else { |
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148 *v = *value; |
589 | 149 } |
150 | |
151 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
6480 | 152 "http map: \"%V\" \"%v\"", &val, v); |
589 | 153 |
154 return NGX_OK; | |
155 } | |
156 | |
157 | |
158 static void * | |
159 ngx_http_map_create_conf(ngx_conf_t *cf) | |
160 { | |
161 ngx_http_map_conf_t *mcf; | |
162 | |
163 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
164 if (mcf == NULL) { | |
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165 return NULL; |
589 | 166 } |
167 | |
168 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
169 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
170 | |
171 return mcf; | |
172 } | |
173 | |
174 | |
175 static char * | |
176 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
177 { | |
178 ngx_http_map_conf_t *mcf = conf; | |
179 | |
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180 char *rv; |
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181 ngx_str_t *value, name; |
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182 ngx_conf_t save; |
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183 ngx_pool_t *pool; |
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184 ngx_hash_init_t hash; |
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185 ngx_http_map_ctx_t *map; |
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186 ngx_http_variable_t *var; |
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187 ngx_http_map_conf_ctx_t ctx; |
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188 ngx_http_compile_complex_value_t ccv; |
589 | 189 |
190 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) { | |
191 mcf->hash_max_size = 2048; | |
192 } | |
193 | |
194 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) { | |
195 mcf->hash_bucket_size = ngx_cacheline_size; | |
196 | |
197 } else { | |
198 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size, | |
199 ngx_cacheline_size); | |
200 } | |
201 | |
202 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t)); | |
203 if (map == NULL) { | |
204 return NGX_CONF_ERROR; | |
205 } | |
206 | |
207 value = cf->args->elts; | |
208 | |
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209 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
589 | 210 |
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211 ccv.cf = cf; |
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212 ccv.value = &value[1]; |
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213 ccv.complex_value = &map->value; |
589 | 214 |
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215 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
589 | 216 return NGX_CONF_ERROR; |
217 } | |
218 | |
219 name = value[2]; | |
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220 |
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221 if (name.data[0] != '$') { |
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222 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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223 "invalid variable name \"%V\"", &name); |
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224 return NGX_CONF_ERROR; |
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225 } |
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226 |
589 | 227 name.len--; |
228 name.data++; | |
229 | |
1565 | 230 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); |
589 | 231 if (var == NULL) { |
232 return NGX_CONF_ERROR; | |
233 } | |
234 | |
637 | 235 var->get_handler = ngx_http_map_variable; |
589 | 236 var->data = (uintptr_t) map; |
237 | |
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238 pool = ngx_create_pool(NGX_DEFAULT_POOL_SIZE, cf->log); |
589 | 239 if (pool == NULL) { |
240 return NGX_CONF_ERROR; | |
241 } | |
242 | |
593 | 243 ctx.keys.pool = cf->pool; |
244 ctx.keys.temp_pool = pool; | |
589 | 245 |
593 | 246 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) { |
589 | 247 ngx_destroy_pool(pool); |
248 return NGX_CONF_ERROR; | |
249 } | |
250 | |
593 | 251 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize); |
589 | 252 if (ctx.values_hash == NULL) { |
253 ngx_destroy_pool(pool); | |
254 return NGX_CONF_ERROR; | |
255 } | |
256 | |
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257 #if (NGX_PCRE) |
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258 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t)) |
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259 != NGX_OK) |
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260 { |
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261 ngx_destroy_pool(pool); |
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262 return NGX_CONF_ERROR; |
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263 } |
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264 #endif |
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265 |
589 | 266 ctx.default_value = NULL; |
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267 ctx.cf = &save; |
589 | 268 ctx.hostnames = 0; |
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269 ctx.no_cacheable = 0; |
589 | 270 |
271 save = *cf; | |
272 cf->pool = pool; | |
273 cf->ctx = &ctx; | |
274 cf->handler = ngx_http_map; | |
275 cf->handler_conf = conf; | |
276 | |
277 rv = ngx_conf_parse(cf, NULL); | |
278 | |
279 *cf = save; | |
280 | |
281 if (rv != NGX_CONF_OK) { | |
282 ngx_destroy_pool(pool); | |
283 return rv; | |
284 } | |
285 | |
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286 if (ctx.no_cacheable) { |
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287 var->flags |= NGX_HTTP_VAR_NOCACHEABLE; |
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288 } |
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289 |
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290 map->default_value = ctx.default_value ? ctx.default_value: |
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291 &ngx_http_variable_null_value; |
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292 |
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293 map->hostnames = ctx.hostnames; |
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294 |
589 | 295 hash.key = ngx_hash_key_lc; |
296 hash.max_size = mcf->hash_max_size; | |
297 hash.bucket_size = mcf->hash_bucket_size; | |
298 hash.name = "map_hash"; | |
299 hash.pool = cf->pool; | |
300 | |
593 | 301 if (ctx.keys.keys.nelts) { |
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302 hash.hash = &map->map.hash.hash; |
589 | 303 hash.temp_pool = NULL; |
304 | |
593 | 305 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts) |
591 | 306 != NGX_OK) |
307 { | |
593 | 308 ngx_destroy_pool(pool); |
589 | 309 return NGX_CONF_ERROR; |
310 } | |
311 } | |
312 | |
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313 if (ctx.keys.dns_wc_head.nelts) { |
589 | 314 |
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315 ngx_qsort(ctx.keys.dns_wc_head.elts, |
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316 (size_t) ctx.keys.dns_wc_head.nelts, |
589 | 317 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
318 | |
319 hash.hash = NULL; | |
320 hash.temp_pool = pool; | |
321 | |
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322 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts, |
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323 ctx.keys.dns_wc_head.nelts) |
589 | 324 != NGX_OK) |
325 { | |
593 | 326 ngx_destroy_pool(pool); |
589 | 327 return NGX_CONF_ERROR; |
328 } | |
329 | |
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330 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash; |
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331 } |
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332 |
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333 if (ctx.keys.dns_wc_tail.nelts) { |
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334 |
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335 ngx_qsort(ctx.keys.dns_wc_tail.elts, |
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336 (size_t) ctx.keys.dns_wc_tail.nelts, |
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337 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
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338 |
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339 hash.hash = NULL; |
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340 hash.temp_pool = pool; |
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341 |
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342 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts, |
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343 ctx.keys.dns_wc_tail.nelts) |
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344 != NGX_OK) |
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345 { |
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346 ngx_destroy_pool(pool); |
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347 return NGX_CONF_ERROR; |
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348 } |
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349 |
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350 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash; |
589 | 351 } |
352 | |
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353 #if (NGX_PCRE) |
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354 |
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355 if (ctx.regexes.nelts) { |
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356 map->map.regex = ctx.regexes.elts; |
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357 map->map.nregex = ctx.regexes.nelts; |
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358 } |
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359 |
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360 #endif |
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361 |
589 | 362 ngx_destroy_pool(pool); |
363 | |
364 return rv; | |
365 } | |
366 | |
367 | |
368 static int ngx_libc_cdecl | |
369 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two) | |
370 { | |
371 ngx_hash_key_t *first, *second; | |
372 | |
373 first = (ngx_hash_key_t *) one; | |
374 second = (ngx_hash_key_t *) two; | |
375 | |
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376 return ngx_dns_strcmp(first->key.data, second->key.data); |
589 | 377 } |
378 | |
379 | |
380 static char * | |
381 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) | |
382 { | |
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383 u_char *data; |
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384 size_t len; |
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385 ngx_int_t rv; |
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386 ngx_str_t *value, v; |
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387 ngx_uint_t i, key; |
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388 ngx_http_map_conf_ctx_t *ctx; |
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389 ngx_http_complex_value_t cv, *cvp; |
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390 ngx_http_variable_value_t *var, **vp; |
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391 ngx_http_compile_complex_value_t ccv; |
589 | 392 |
393 ctx = cf->ctx; | |
394 | |
395 value = cf->args->elts; | |
396 | |
397 if (cf->args->nelts == 1 | |
398 && ngx_strcmp(value[0].data, "hostnames") == 0) | |
399 { | |
400 ctx->hostnames = 1; | |
401 return NGX_CONF_OK; | |
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402 } |
589 | 403 |
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404 if (cf->args->nelts == 1 |
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405 && ngx_strcmp(value[0].data, "volatile") == 0) |
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406 { |
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407 ctx->no_cacheable = 1; |
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408 return NGX_CONF_OK; |
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409 } |
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410 |
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411 if (cf->args->nelts != 2) { |
589 | 412 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
413 "invalid number of the map parameters"); | |
414 return NGX_CONF_ERROR; | |
415 } | |
416 | |
417 if (ngx_strcmp(value[0].data, "include") == 0) { | |
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418 return ngx_conf_include(cf, dummy, conf); |
589 | 419 } |
420 | |
421 key = 0; | |
422 | |
423 for (i = 0; i < value[1].len; i++) { | |
424 key = ngx_hash(key, value[1].data[i]); | |
425 } | |
426 | |
593 | 427 key %= ctx->keys.hsize; |
589 | 428 |
429 vp = ctx->values_hash[key].elts; | |
430 | |
431 if (vp) { | |
432 for (i = 0; i < ctx->values_hash[key].nelts; i++) { | |
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433 |
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434 if (vp[i]->valid) { |
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435 data = vp[i]->data; |
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436 len = vp[i]->len; |
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437 |
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438 } else { |
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439 cvp = (ngx_http_complex_value_t *) vp[i]->data; |
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440 data = cvp->value.data; |
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441 len = cvp->value.len; |
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442 } |
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443 |
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444 if (value[1].len != len) { |
589 | 445 continue; |
446 } | |
447 | |
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448 if (ngx_strncmp(value[1].data, data, len) == 0) { |
589 | 449 var = vp[i]; |
450 goto found; | |
451 } | |
452 } | |
453 | |
454 } else { | |
455 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4, | |
456 sizeof(ngx_http_variable_value_t *)) | |
457 != NGX_OK) | |
458 { | |
459 return NGX_CONF_ERROR; | |
460 } | |
461 } | |
462 | |
593 | 463 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
589 | 464 if (var == NULL) { |
465 return NGX_CONF_ERROR; | |
466 } | |
467 | |
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468 v.len = value[1].len; |
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469 v.data = ngx_pstrdup(ctx->keys.pool, &value[1]); |
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470 if (v.data == NULL) { |
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471 return NGX_CONF_ERROR; |
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472 } |
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473 |
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474 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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475 |
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476 ccv.cf = ctx->cf; |
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477 ccv.value = &v; |
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478 ccv.complex_value = &cv; |
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479 |
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480 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
589 | 481 return NGX_CONF_ERROR; |
482 } | |
483 | |
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484 if (cv.lengths != NULL) { |
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485 cvp = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_complex_value_t)); |
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486 if (cvp == NULL) { |
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487 return NGX_CONF_ERROR; |
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488 } |
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489 |
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490 *cvp = cv; |
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491 |
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492 var->len = 0; |
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493 var->data = (u_char *) cvp; |
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494 var->valid = 0; |
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495 |
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496 } else { |
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497 var->len = v.len; |
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498 var->data = v.data; |
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499 var->valid = 1; |
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500 } |
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501 |
1565 | 502 var->no_cacheable = 0; |
589 | 503 var->not_found = 0; |
504 | |
505 vp = ngx_array_push(&ctx->values_hash[key]); | |
506 if (vp == NULL) { | |
507 return NGX_CONF_ERROR; | |
508 } | |
509 | |
510 *vp = var; | |
511 | |
512 found: | |
513 | |
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514 if (ngx_strcmp(value[0].data, "default") == 0) { |
589 | 515 |
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516 if (ctx->default_value) { |
589 | 517 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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518 "duplicate default map parameter"); |
589 | 519 return NGX_CONF_ERROR; |
520 } | |
521 | |
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522 ctx->default_value = var; |
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523 |
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524 return NGX_CONF_OK; |
589 | 525 } |
526 | |
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527 #if (NGX_PCRE) |
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528 |
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529 if (value[0].len && value[0].data[0] == '~') { |
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530 ngx_regex_compile_t rc; |
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531 ngx_http_map_regex_t *regex; |
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532 u_char errstr[NGX_MAX_CONF_ERRSTR]; |
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533 |
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534 regex = ngx_array_push(&ctx->regexes); |
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535 if (regex == NULL) { |
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536 return NGX_CONF_ERROR; |
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537 } |
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538 |
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539 value[0].len--; |
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540 value[0].data++; |
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541 |
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542 ngx_memzero(&rc, sizeof(ngx_regex_compile_t)); |
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543 |
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544 if (value[0].data[0] == '*') { |
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545 value[0].len--; |
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546 value[0].data++; |
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547 rc.options = NGX_REGEX_CASELESS; |
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548 } |
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549 |
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550 rc.pattern = value[0]; |
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551 rc.err.len = NGX_MAX_CONF_ERRSTR; |
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552 rc.err.data = errstr; |
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553 |
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554 regex->regex = ngx_http_regex_compile(ctx->cf, &rc); |
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555 if (regex->regex == NULL) { |
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556 return NGX_CONF_ERROR; |
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557 } |
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558 |
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559 regex->value = var; |
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560 |
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561 return NGX_CONF_OK; |
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562 } |
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563 |
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564 #endif |
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565 |
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566 if (value[0].len && value[0].data[0] == '\\') { |
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567 value[0].len--; |
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568 value[0].data++; |
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569 } |
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570 |
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571 rv = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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572 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
589 | 573 |
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574 if (rv == NGX_OK) { |
591 | 575 return NGX_CONF_OK; |
576 } | |
589 | 577 |
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578 if (rv == NGX_DECLINED) { |
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579 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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580 "invalid hostname or wildcard \"%V\"", &value[0]); |
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581 } |
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582 |
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|
583 if (rv == NGX_BUSY) { |
591 | 584 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
585 "conflicting parameter \"%V\"", &value[0]); | |
586 } | |
589 | 587 |
591 | 588 return NGX_CONF_ERROR; |
589 | 589 } |