Mercurial > hg > nginx
annotate src/http/modules/ngx_http_map_module.c @ 3872:83cd1910329c
allow regex as "map" parameter
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Wed, 16 Mar 2011 15:32:31 +0000 |
| parents | 164a7f8df979 |
| children | cb2432ed17fd |
| rev | line source |
|---|---|
| 589 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 #include <ngx_http.h> | |
| 10 | |
| 11 | |
| 12 typedef struct { | |
| 13 ngx_uint_t hash_max_size; | |
| 14 ngx_uint_t hash_bucket_size; | |
| 15 } ngx_http_map_conf_t; | |
| 16 | |
| 17 | |
| 18 typedef struct { | |
| 593 | 19 ngx_hash_keys_arrays_t keys; |
| 589 | 20 |
| 21 ngx_array_t *values_hash; | |
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22 ngx_array_t var_values; |
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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; |
| 589 | 29 ngx_uint_t hostnames; /* unsigned hostnames:1 */ |
| 30 } ngx_http_map_conf_ctx_t; | |
| 31 | |
| 32 | |
| 33 typedef struct { | |
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34 ngx_http_map_t map; |
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35 ngx_http_complex_value_t value; |
| 589 | 36 ngx_http_variable_value_t *default_value; |
| 37 ngx_uint_t hostnames; /* unsigned hostnames:1 */ | |
| 38 } ngx_http_map_ctx_t; | |
| 39 | |
| 40 | |
| 41 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one, | |
| 42 const void *two); | |
| 43 static void *ngx_http_map_create_conf(ngx_conf_t *cf); | |
| 44 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); | |
| 45 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf); | |
| 46 | |
| 47 | |
| 48 static ngx_command_t ngx_http_map_commands[] = { | |
| 49 | |
| 50 { ngx_string("map"), | |
| 51 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2, | |
| 52 ngx_http_map_block, | |
| 53 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 54 0, | |
| 55 NULL }, | |
| 56 | |
| 57 { ngx_string("map_hash_max_size"), | |
| 58 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
| 59 ngx_conf_set_num_slot, | |
| 60 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 61 offsetof(ngx_http_map_conf_t, hash_max_size), | |
| 62 NULL }, | |
| 63 | |
| 64 { ngx_string("map_hash_bucket_size"), | |
| 65 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
| 66 ngx_conf_set_num_slot, | |
| 67 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 68 offsetof(ngx_http_map_conf_t, hash_bucket_size), | |
| 69 NULL }, | |
| 70 | |
| 71 ngx_null_command | |
| 72 }; | |
| 73 | |
| 74 | |
| 75 static ngx_http_module_t ngx_http_map_module_ctx = { | |
| 76 NULL, /* preconfiguration */ | |
| 77 NULL, /* postconfiguration */ | |
| 78 | |
| 79 ngx_http_map_create_conf, /* create main configuration */ | |
| 80 NULL, /* init main configuration */ | |
| 81 | |
| 82 NULL, /* create server configuration */ | |
| 83 NULL, /* merge server configuration */ | |
| 84 | |
| 85 NULL, /* create location configuration */ | |
| 86 NULL /* merge location configuration */ | |
| 87 }; | |
| 88 | |
| 89 | |
| 90 ngx_module_t ngx_http_map_module = { | |
| 91 NGX_MODULE_V1, | |
| 92 &ngx_http_map_module_ctx, /* module context */ | |
| 93 ngx_http_map_commands, /* module directives */ | |
| 94 NGX_HTTP_MODULE, /* module type */ | |
| 95 NULL, /* init master */ | |
| 96 NULL, /* init module */ | |
| 97 NULL, /* init process */ | |
| 98 NULL, /* init thread */ | |
| 99 NULL, /* exit thread */ | |
| 100 NULL, /* exit process */ | |
| 101 NULL, /* exit master */ | |
| 102 NGX_MODULE_V1_PADDING | |
| 103 }; | |
| 104 | |
| 105 | |
| 106 static ngx_int_t | |
| 107 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, | |
| 108 uintptr_t data) | |
| 109 { | |
| 110 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data; | |
| 111 | |
| 112 size_t len; | |
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113 ngx_str_t val; |
| 2136 | 114 ngx_uint_t key; |
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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 len = val.len; |
| 589 | 125 |
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126 if (len && map->hostnames && val.data[len - 1] == '.') { |
| 589 | 127 len--; |
| 128 } | |
| 129 | |
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130 key = ngx_hash_strlow(val.data, val.data, len); |
| 589 | 131 |
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132 value = ngx_http_map_find(r, &map->map, key, val.data, len, &val); |
| 589 | 133 |
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134 if (value == NULL) { |
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135 value = map->default_value; |
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136 } |
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137 |
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138 if (!value->valid) { |
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139 value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data); |
| 589 | 140 |
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141 if (value == NULL || value->not_found) { |
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142 value = &ngx_http_variable_null_value; |
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143 } |
| 589 | 144 } |
| 145 | |
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146 *v = *value; |
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147 |
| 589 | 148 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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149 "http map: \"%v\" \"%v\"", &val, v); |
| 589 | 150 |
| 151 return NGX_OK; | |
| 152 } | |
| 153 | |
| 154 | |
| 155 static void * | |
| 156 ngx_http_map_create_conf(ngx_conf_t *cf) | |
| 157 { | |
| 158 ngx_http_map_conf_t *mcf; | |
| 159 | |
| 160 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
| 161 if (mcf == NULL) { | |
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162 return NULL; |
| 589 | 163 } |
| 164 | |
| 165 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
| 166 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
| 167 | |
| 168 return mcf; | |
| 169 } | |
| 170 | |
| 171 | |
| 172 static char * | |
| 173 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 174 { | |
| 175 ngx_http_map_conf_t *mcf = conf; | |
| 176 | |
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177 char *rv; |
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178 ngx_str_t *value, name; |
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179 ngx_conf_t save; |
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180 ngx_pool_t *pool; |
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181 ngx_hash_init_t hash; |
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182 ngx_http_map_ctx_t *map; |
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183 ngx_http_variable_t *var; |
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184 ngx_http_map_conf_ctx_t ctx; |
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185 ngx_http_compile_complex_value_t ccv; |
| 589 | 186 |
| 187 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) { | |
| 188 mcf->hash_max_size = 2048; | |
| 189 } | |
| 190 | |
| 191 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) { | |
| 192 mcf->hash_bucket_size = ngx_cacheline_size; | |
| 193 | |
| 194 } else { | |
| 195 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size, | |
| 196 ngx_cacheline_size); | |
| 197 } | |
| 198 | |
| 199 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t)); | |
| 200 if (map == NULL) { | |
| 201 return NGX_CONF_ERROR; | |
| 202 } | |
| 203 | |
| 204 value = cf->args->elts; | |
| 205 | |
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206 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 589 | 207 |
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208 ccv.cf = cf; |
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209 ccv.value = &value[1]; |
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210 ccv.complex_value = &map->value; |
| 589 | 211 |
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212 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 589 | 213 return NGX_CONF_ERROR; |
| 214 } | |
| 215 | |
| 216 name = value[2]; | |
| 217 name.len--; | |
| 218 name.data++; | |
| 219 | |
| 1565 | 220 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); |
| 589 | 221 if (var == NULL) { |
| 222 return NGX_CONF_ERROR; | |
| 223 } | |
| 224 | |
| 637 | 225 var->get_handler = ngx_http_map_variable; |
| 589 | 226 var->data = (uintptr_t) map; |
| 227 | |
| 228 pool = ngx_create_pool(16384, cf->log); | |
| 229 if (pool == NULL) { | |
| 230 return NGX_CONF_ERROR; | |
| 231 } | |
| 232 | |
| 593 | 233 ctx.keys.pool = cf->pool; |
| 234 ctx.keys.temp_pool = pool; | |
| 589 | 235 |
| 593 | 236 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) { |
| 589 | 237 ngx_destroy_pool(pool); |
| 238 return NGX_CONF_ERROR; | |
| 239 } | |
| 240 | |
| 593 | 241 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize); |
| 589 | 242 if (ctx.values_hash == NULL) { |
| 243 ngx_destroy_pool(pool); | |
| 244 return NGX_CONF_ERROR; | |
| 245 } | |
| 246 | |
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247 if (ngx_array_init(&ctx.var_values, cf->pool, 2, |
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248 sizeof(ngx_http_variable_value_t)) |
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249 != NGX_OK) |
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250 { |
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251 ngx_destroy_pool(pool); |
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252 return NGX_CONF_ERROR; |
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253 } |
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254 |
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255 #if (NGX_PCRE) |
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256 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t)) |
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257 != NGX_OK) |
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258 { |
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259 ngx_destroy_pool(pool); |
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260 return NGX_CONF_ERROR; |
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261 } |
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262 #endif |
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263 |
| 589 | 264 ctx.default_value = NULL; |
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265 ctx.cf = &save; |
| 589 | 266 ctx.hostnames = 0; |
| 267 | |
| 268 save = *cf; | |
| 269 cf->pool = pool; | |
| 270 cf->ctx = &ctx; | |
| 271 cf->handler = ngx_http_map; | |
| 272 cf->handler_conf = conf; | |
| 273 | |
| 274 rv = ngx_conf_parse(cf, NULL); | |
| 275 | |
| 276 *cf = save; | |
| 277 | |
| 278 if (rv != NGX_CONF_OK) { | |
| 279 ngx_destroy_pool(pool); | |
| 280 return rv; | |
| 281 } | |
| 282 | |
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283 map->default_value = ctx.default_value ? ctx.default_value: |
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284 &ngx_http_variable_null_value; |
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285 |
| 589 | 286 hash.key = ngx_hash_key_lc; |
| 287 hash.max_size = mcf->hash_max_size; | |
| 288 hash.bucket_size = mcf->hash_bucket_size; | |
| 289 hash.name = "map_hash"; | |
| 290 hash.pool = cf->pool; | |
| 291 | |
| 593 | 292 if (ctx.keys.keys.nelts) { |
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293 hash.hash = &map->map.hash.hash; |
| 589 | 294 hash.temp_pool = NULL; |
| 295 | |
| 593 | 296 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts) |
| 591 | 297 != NGX_OK) |
| 298 { | |
| 593 | 299 ngx_destroy_pool(pool); |
| 589 | 300 return NGX_CONF_ERROR; |
| 301 } | |
| 302 } | |
| 303 | |
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304 if (ctx.keys.dns_wc_head.nelts) { |
| 589 | 305 |
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306 ngx_qsort(ctx.keys.dns_wc_head.elts, |
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307 (size_t) ctx.keys.dns_wc_head.nelts, |
| 589 | 308 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
| 309 | |
| 310 hash.hash = NULL; | |
| 311 hash.temp_pool = pool; | |
| 312 | |
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313 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts, |
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314 ctx.keys.dns_wc_head.nelts) |
| 589 | 315 != NGX_OK) |
| 316 { | |
| 593 | 317 ngx_destroy_pool(pool); |
| 589 | 318 return NGX_CONF_ERROR; |
| 319 } | |
| 320 | |
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321 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash; |
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322 } |
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323 |
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324 if (ctx.keys.dns_wc_tail.nelts) { |
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325 |
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326 ngx_qsort(ctx.keys.dns_wc_tail.elts, |
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327 (size_t) ctx.keys.dns_wc_tail.nelts, |
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328 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
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329 |
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330 hash.hash = NULL; |
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331 hash.temp_pool = pool; |
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332 |
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333 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts, |
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334 ctx.keys.dns_wc_tail.nelts) |
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335 != NGX_OK) |
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336 { |
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337 ngx_destroy_pool(pool); |
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338 return NGX_CONF_ERROR; |
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339 } |
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340 |
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341 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash; |
| 589 | 342 } |
| 343 | |
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344 #if (NGX_PCRE) |
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345 |
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346 if (ctx.regexes.nelts) { |
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347 map->map.regex = ctx.regexes.elts; |
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348 map->map.nregex = ctx.regexes.nelts; |
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349 } |
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350 |
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351 #endif |
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352 |
| 589 | 353 ngx_destroy_pool(pool); |
| 354 | |
| 355 return rv; | |
| 356 } | |
| 357 | |
| 358 | |
| 359 static int ngx_libc_cdecl | |
| 360 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two) | |
| 361 { | |
| 362 ngx_hash_key_t *first, *second; | |
| 363 | |
| 364 first = (ngx_hash_key_t *) one; | |
| 365 second = (ngx_hash_key_t *) two; | |
| 366 | |
|
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367 return ngx_dns_strcmp(first->key.data, second->key.data); |
| 589 | 368 } |
| 369 | |
| 370 | |
| 371 static char * | |
| 372 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) | |
| 373 { | |
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374 ngx_int_t rc, index; |
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375 ngx_str_t *value, file, name; |
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376 ngx_uint_t i, key; |
| 589 | 377 ngx_http_map_conf_ctx_t *ctx; |
| 591 | 378 ngx_http_variable_value_t *var, **vp; |
| 589 | 379 |
| 380 ctx = cf->ctx; | |
| 381 | |
| 382 value = cf->args->elts; | |
| 383 | |
| 384 if (cf->args->nelts == 1 | |
| 385 && ngx_strcmp(value[0].data, "hostnames") == 0) | |
| 386 { | |
| 387 ctx->hostnames = 1; | |
| 388 return NGX_CONF_OK; | |
| 389 | |
| 390 } else if (cf->args->nelts != 2) { | |
| 391 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 392 "invalid number of the map parameters"); | |
| 393 return NGX_CONF_ERROR; | |
| 394 } | |
| 395 | |
| 396 if (ngx_strcmp(value[0].data, "include") == 0) { | |
| 397 file = value[1]; | |
| 398 | |
| 3642 | 399 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) { |
| 589 | 400 return NGX_CONF_ERROR; |
| 401 } | |
| 402 | |
| 403 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data); | |
| 404 | |
| 405 return ngx_conf_parse(cf, &file); | |
| 406 } | |
| 407 | |
|
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408 if (value[1].data[0] == '$') { |
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409 name = value[1]; |
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410 name.len--; |
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411 name.data++; |
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412 |
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413 index = ngx_http_get_variable_index(ctx->cf, &name); |
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414 if (index == NGX_ERROR) { |
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415 return NGX_CONF_ERROR; |
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416 } |
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417 |
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418 var = ctx->var_values.elts; |
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419 |
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420 for (i = 0; i < ctx->var_values.nelts; i++) { |
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421 if (index == (ngx_int_t) var[i].data) { |
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422 goto found; |
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423 } |
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424 } |
|
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425 |
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426 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
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427 if (var == NULL) { |
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428 return NGX_CONF_ERROR; |
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429 } |
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430 |
|
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431 var->valid = 0; |
|
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432 var->no_cacheable = 0; |
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433 var->not_found = 0; |
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434 var->len = 0; |
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435 var->data = (u_char *) index; |
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436 |
|
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437 vp = ngx_array_push(&ctx->var_values); |
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438 if (vp == NULL) { |
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439 return NGX_CONF_ERROR; |
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440 } |
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441 |
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442 *vp = var; |
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443 |
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444 goto found; |
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445 } |
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446 |
| 589 | 447 key = 0; |
| 448 | |
| 449 for (i = 0; i < value[1].len; i++) { | |
| 450 key = ngx_hash(key, value[1].data[i]); | |
| 451 } | |
| 452 | |
| 593 | 453 key %= ctx->keys.hsize; |
| 589 | 454 |
| 455 vp = ctx->values_hash[key].elts; | |
| 456 | |
| 457 if (vp) { | |
| 458 for (i = 0; i < ctx->values_hash[key].nelts; i++) { | |
| 459 if (value[1].len != (size_t) vp[i]->len) { | |
| 460 continue; | |
| 461 } | |
| 462 | |
| 463 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) { | |
| 464 var = vp[i]; | |
| 465 goto found; | |
| 466 } | |
| 467 } | |
| 468 | |
| 469 } else { | |
| 470 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4, | |
| 471 sizeof(ngx_http_variable_value_t *)) | |
| 472 != NGX_OK) | |
| 473 { | |
| 474 return NGX_CONF_ERROR; | |
| 475 } | |
| 476 } | |
| 477 | |
| 593 | 478 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
| 589 | 479 if (var == NULL) { |
| 480 return NGX_CONF_ERROR; | |
| 481 } | |
| 482 | |
| 483 var->len = value[1].len; | |
| 593 | 484 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]); |
| 589 | 485 if (var->data == NULL) { |
| 486 return NGX_CONF_ERROR; | |
| 487 } | |
| 488 | |
| 489 var->valid = 1; | |
| 1565 | 490 var->no_cacheable = 0; |
| 589 | 491 var->not_found = 0; |
| 492 | |
| 493 vp = ngx_array_push(&ctx->values_hash[key]); | |
| 494 if (vp == NULL) { | |
| 495 return NGX_CONF_ERROR; | |
| 496 } | |
| 497 | |
| 498 *vp = var; | |
| 499 | |
| 500 found: | |
| 501 | |
|
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502 if (ngx_strcmp(value[0].data, "default") == 0) { |
| 589 | 503 |
|
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504 if (ctx->default_value) { |
| 589 | 505 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
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506 "duplicate default map parameter"); |
| 589 | 507 return NGX_CONF_ERROR; |
| 508 } | |
| 509 | |
|
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510 ctx->default_value = var; |
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511 |
|
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512 return NGX_CONF_OK; |
| 589 | 513 } |
| 514 | |
|
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515 #if (NGX_PCRE) |
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516 |
|
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517 if (value[0].len && value[0].data[0] == '~') { |
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518 ngx_regex_compile_t rc; |
|
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519 ngx_http_map_regex_t *regex; |
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520 u_char errstr[NGX_MAX_CONF_ERRSTR]; |
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521 |
|
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522 regex = ngx_array_push(&ctx->regexes); |
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523 if (regex == NULL) { |
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524 return NGX_CONF_ERROR; |
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525 } |
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526 |
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527 value[0].len--; |
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528 value[0].data++; |
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529 |
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530 ngx_memzero(&rc, sizeof(ngx_regex_compile_t)); |
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531 |
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532 if (value[0].data[0] == '*') { |
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533 value[0].len--; |
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534 value[0].data++; |
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535 rc.options = NGX_REGEX_CASELESS; |
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536 } |
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537 |
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538 rc.pattern = value[0]; |
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539 rc.err.len = NGX_MAX_CONF_ERRSTR; |
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540 rc.err.data = errstr; |
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541 |
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542 regex->regex = ngx_http_regex_compile(ctx->cf, &rc); |
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543 if (regex->regex == NULL) { |
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544 return NGX_CONF_ERROR; |
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545 } |
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546 |
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547 regex->value = var; |
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548 |
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549 return NGX_CONF_OK; |
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550 } |
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551 |
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552 #endif |
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553 |
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554 if (value[0].len && value[0].data[0] == '\\') { |
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555 value[0].len--; |
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556 value[0].data++; |
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557 } |
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558 |
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559 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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560 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
| 589 | 561 |
| 591 | 562 if (rc == NGX_OK) { |
| 563 return NGX_CONF_OK; | |
| 564 } | |
| 589 | 565 |
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566 if (rc == NGX_DECLINED) { |
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567 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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568 "invalid hostname or wildcard \"%V\"", &value[0]); |
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569 } |
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570 |
| 591 | 571 if (rc == NGX_BUSY) { |
| 572 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 573 "conflicting parameter \"%V\"", &value[0]); | |
| 574 } | |
| 589 | 575 |
| 591 | 576 return NGX_CONF_ERROR; |
| 589 | 577 } |