Mercurial > hg > nginx
annotate src/http/modules/ngx_http_map_module.c @ 3929:fa4612bfb9fa
change ngx_http_map_find(): use case sensitive regexes
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Mon, 30 May 2011 12:36:17 +0000 |
| parents | cb2432ed17fd |
| children | ace14fd91086 |
| 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; |
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114 ngx_http_variable_value_t *value; |
| 589 | 115 |
| 116 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 117 "http map started"); | |
| 118 | |
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119 if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) { |
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120 return NGX_ERROR; |
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121 } |
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122 |
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123 len = val.len; |
| 589 | 124 |
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125 if (len && map->hostnames && val.data[len - 1] == '.') { |
| 589 | 126 len--; |
| 127 } | |
| 128 | |
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129 value = ngx_http_map_find(r, &map->map, &val); |
| 589 | 130 |
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131 if (value == NULL) { |
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132 value = map->default_value; |
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133 } |
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134 |
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135 if (!value->valid) { |
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136 value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data); |
| 589 | 137 |
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138 if (value == NULL || value->not_found) { |
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139 value = &ngx_http_variable_null_value; |
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140 } |
| 589 | 141 } |
| 142 | |
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143 *v = *value; |
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144 |
| 589 | 145 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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146 "http map: \"%v\" \"%v\"", &val, v); |
| 589 | 147 |
| 148 return NGX_OK; | |
| 149 } | |
| 150 | |
| 151 | |
| 152 static void * | |
| 153 ngx_http_map_create_conf(ngx_conf_t *cf) | |
| 154 { | |
| 155 ngx_http_map_conf_t *mcf; | |
| 156 | |
| 157 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
| 158 if (mcf == NULL) { | |
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159 return NULL; |
| 589 | 160 } |
| 161 | |
| 162 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
| 163 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
| 164 | |
| 165 return mcf; | |
| 166 } | |
| 167 | |
| 168 | |
| 169 static char * | |
| 170 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 171 { | |
| 172 ngx_http_map_conf_t *mcf = conf; | |
| 173 | |
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174 char *rv; |
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175 ngx_str_t *value, name; |
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176 ngx_conf_t save; |
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177 ngx_pool_t *pool; |
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178 ngx_hash_init_t hash; |
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179 ngx_http_map_ctx_t *map; |
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180 ngx_http_variable_t *var; |
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181 ngx_http_map_conf_ctx_t ctx; |
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182 ngx_http_compile_complex_value_t ccv; |
| 589 | 183 |
| 184 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) { | |
| 185 mcf->hash_max_size = 2048; | |
| 186 } | |
| 187 | |
| 188 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) { | |
| 189 mcf->hash_bucket_size = ngx_cacheline_size; | |
| 190 | |
| 191 } else { | |
| 192 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size, | |
| 193 ngx_cacheline_size); | |
| 194 } | |
| 195 | |
| 196 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t)); | |
| 197 if (map == NULL) { | |
| 198 return NGX_CONF_ERROR; | |
| 199 } | |
| 200 | |
| 201 value = cf->args->elts; | |
| 202 | |
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203 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
| 589 | 204 |
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205 ccv.cf = cf; |
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206 ccv.value = &value[1]; |
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207 ccv.complex_value = &map->value; |
| 589 | 208 |
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209 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
| 589 | 210 return NGX_CONF_ERROR; |
| 211 } | |
| 212 | |
| 213 name = value[2]; | |
| 214 name.len--; | |
| 215 name.data++; | |
| 216 | |
| 1565 | 217 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); |
| 589 | 218 if (var == NULL) { |
| 219 return NGX_CONF_ERROR; | |
| 220 } | |
| 221 | |
| 637 | 222 var->get_handler = ngx_http_map_variable; |
| 589 | 223 var->data = (uintptr_t) map; |
| 224 | |
| 225 pool = ngx_create_pool(16384, cf->log); | |
| 226 if (pool == NULL) { | |
| 227 return NGX_CONF_ERROR; | |
| 228 } | |
| 229 | |
| 593 | 230 ctx.keys.pool = cf->pool; |
| 231 ctx.keys.temp_pool = pool; | |
| 589 | 232 |
| 593 | 233 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) { |
| 589 | 234 ngx_destroy_pool(pool); |
| 235 return NGX_CONF_ERROR; | |
| 236 } | |
| 237 | |
| 593 | 238 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize); |
| 589 | 239 if (ctx.values_hash == NULL) { |
| 240 ngx_destroy_pool(pool); | |
| 241 return NGX_CONF_ERROR; | |
| 242 } | |
| 243 | |
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244 if (ngx_array_init(&ctx.var_values, cf->pool, 2, |
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245 sizeof(ngx_http_variable_value_t)) |
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246 != NGX_OK) |
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247 { |
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248 ngx_destroy_pool(pool); |
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249 return NGX_CONF_ERROR; |
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250 } |
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251 |
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252 #if (NGX_PCRE) |
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253 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t)) |
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254 != NGX_OK) |
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255 { |
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256 ngx_destroy_pool(pool); |
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257 return NGX_CONF_ERROR; |
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258 } |
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259 #endif |
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260 |
| 589 | 261 ctx.default_value = NULL; |
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262 ctx.cf = &save; |
| 589 | 263 ctx.hostnames = 0; |
| 264 | |
| 265 save = *cf; | |
| 266 cf->pool = pool; | |
| 267 cf->ctx = &ctx; | |
| 268 cf->handler = ngx_http_map; | |
| 269 cf->handler_conf = conf; | |
| 270 | |
| 271 rv = ngx_conf_parse(cf, NULL); | |
| 272 | |
| 273 *cf = save; | |
| 274 | |
| 275 if (rv != NGX_CONF_OK) { | |
| 276 ngx_destroy_pool(pool); | |
| 277 return rv; | |
| 278 } | |
| 279 | |
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280 map->default_value = ctx.default_value ? ctx.default_value: |
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281 &ngx_http_variable_null_value; |
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282 |
| 589 | 283 hash.key = ngx_hash_key_lc; |
| 284 hash.max_size = mcf->hash_max_size; | |
| 285 hash.bucket_size = mcf->hash_bucket_size; | |
| 286 hash.name = "map_hash"; | |
| 287 hash.pool = cf->pool; | |
| 288 | |
| 593 | 289 if (ctx.keys.keys.nelts) { |
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290 hash.hash = &map->map.hash.hash; |
| 589 | 291 hash.temp_pool = NULL; |
| 292 | |
| 593 | 293 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts) |
| 591 | 294 != NGX_OK) |
| 295 { | |
| 593 | 296 ngx_destroy_pool(pool); |
| 589 | 297 return NGX_CONF_ERROR; |
| 298 } | |
| 299 } | |
| 300 | |
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301 if (ctx.keys.dns_wc_head.nelts) { |
| 589 | 302 |
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303 ngx_qsort(ctx.keys.dns_wc_head.elts, |
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304 (size_t) ctx.keys.dns_wc_head.nelts, |
| 589 | 305 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
| 306 | |
| 307 hash.hash = NULL; | |
| 308 hash.temp_pool = pool; | |
| 309 | |
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310 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts, |
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311 ctx.keys.dns_wc_head.nelts) |
| 589 | 312 != NGX_OK) |
| 313 { | |
| 593 | 314 ngx_destroy_pool(pool); |
| 589 | 315 return NGX_CONF_ERROR; |
| 316 } | |
| 317 | |
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318 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash; |
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319 } |
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320 |
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321 if (ctx.keys.dns_wc_tail.nelts) { |
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322 |
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323 ngx_qsort(ctx.keys.dns_wc_tail.elts, |
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324 (size_t) ctx.keys.dns_wc_tail.nelts, |
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325 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
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326 |
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327 hash.hash = NULL; |
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328 hash.temp_pool = pool; |
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329 |
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330 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts, |
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331 ctx.keys.dns_wc_tail.nelts) |
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332 != NGX_OK) |
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333 { |
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334 ngx_destroy_pool(pool); |
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335 return NGX_CONF_ERROR; |
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336 } |
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337 |
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338 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash; |
| 589 | 339 } |
| 340 | |
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341 #if (NGX_PCRE) |
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342 |
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343 if (ctx.regexes.nelts) { |
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344 map->map.regex = ctx.regexes.elts; |
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345 map->map.nregex = ctx.regexes.nelts; |
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346 } |
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347 |
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348 #endif |
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349 |
| 589 | 350 ngx_destroy_pool(pool); |
| 351 | |
| 352 return rv; | |
| 353 } | |
| 354 | |
| 355 | |
| 356 static int ngx_libc_cdecl | |
| 357 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two) | |
| 358 { | |
| 359 ngx_hash_key_t *first, *second; | |
| 360 | |
| 361 first = (ngx_hash_key_t *) one; | |
| 362 second = (ngx_hash_key_t *) two; | |
| 363 | |
|
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364 return ngx_dns_strcmp(first->key.data, second->key.data); |
| 589 | 365 } |
| 366 | |
| 367 | |
| 368 static char * | |
| 369 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) | |
| 370 { | |
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371 ngx_int_t rc, index; |
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372 ngx_str_t *value, file, name; |
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373 ngx_uint_t i, key; |
| 589 | 374 ngx_http_map_conf_ctx_t *ctx; |
| 591 | 375 ngx_http_variable_value_t *var, **vp; |
| 589 | 376 |
| 377 ctx = cf->ctx; | |
| 378 | |
| 379 value = cf->args->elts; | |
| 380 | |
| 381 if (cf->args->nelts == 1 | |
| 382 && ngx_strcmp(value[0].data, "hostnames") == 0) | |
| 383 { | |
| 384 ctx->hostnames = 1; | |
| 385 return NGX_CONF_OK; | |
| 386 | |
| 387 } else if (cf->args->nelts != 2) { | |
| 388 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 389 "invalid number of the map parameters"); | |
| 390 return NGX_CONF_ERROR; | |
| 391 } | |
| 392 | |
| 393 if (ngx_strcmp(value[0].data, "include") == 0) { | |
| 394 file = value[1]; | |
| 395 | |
| 3642 | 396 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) { |
| 589 | 397 return NGX_CONF_ERROR; |
| 398 } | |
| 399 | |
| 400 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data); | |
| 401 | |
| 402 return ngx_conf_parse(cf, &file); | |
| 403 } | |
| 404 | |
|
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405 if (value[1].data[0] == '$') { |
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406 name = value[1]; |
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407 name.len--; |
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408 name.data++; |
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409 |
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410 index = ngx_http_get_variable_index(ctx->cf, &name); |
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411 if (index == NGX_ERROR) { |
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412 return NGX_CONF_ERROR; |
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413 } |
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414 |
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415 var = ctx->var_values.elts; |
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416 |
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417 for (i = 0; i < ctx->var_values.nelts; i++) { |
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418 if (index == (ngx_int_t) var[i].data) { |
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419 goto found; |
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420 } |
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421 } |
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422 |
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423 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
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424 if (var == NULL) { |
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425 return NGX_CONF_ERROR; |
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426 } |
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427 |
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428 var->valid = 0; |
|
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429 var->no_cacheable = 0; |
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430 var->not_found = 0; |
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431 var->len = 0; |
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432 var->data = (u_char *) index; |
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433 |
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434 vp = ngx_array_push(&ctx->var_values); |
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435 if (vp == NULL) { |
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436 return NGX_CONF_ERROR; |
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437 } |
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438 |
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439 *vp = var; |
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440 |
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441 goto found; |
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442 } |
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443 |
| 589 | 444 key = 0; |
| 445 | |
| 446 for (i = 0; i < value[1].len; i++) { | |
| 447 key = ngx_hash(key, value[1].data[i]); | |
| 448 } | |
| 449 | |
| 593 | 450 key %= ctx->keys.hsize; |
| 589 | 451 |
| 452 vp = ctx->values_hash[key].elts; | |
| 453 | |
| 454 if (vp) { | |
| 455 for (i = 0; i < ctx->values_hash[key].nelts; i++) { | |
| 456 if (value[1].len != (size_t) vp[i]->len) { | |
| 457 continue; | |
| 458 } | |
| 459 | |
| 460 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) { | |
| 461 var = vp[i]; | |
| 462 goto found; | |
| 463 } | |
| 464 } | |
| 465 | |
| 466 } else { | |
| 467 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4, | |
| 468 sizeof(ngx_http_variable_value_t *)) | |
| 469 != NGX_OK) | |
| 470 { | |
| 471 return NGX_CONF_ERROR; | |
| 472 } | |
| 473 } | |
| 474 | |
| 593 | 475 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
| 589 | 476 if (var == NULL) { |
| 477 return NGX_CONF_ERROR; | |
| 478 } | |
| 479 | |
| 480 var->len = value[1].len; | |
| 593 | 481 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]); |
| 589 | 482 if (var->data == NULL) { |
| 483 return NGX_CONF_ERROR; | |
| 484 } | |
| 485 | |
| 486 var->valid = 1; | |
| 1565 | 487 var->no_cacheable = 0; |
| 589 | 488 var->not_found = 0; |
| 489 | |
| 490 vp = ngx_array_push(&ctx->values_hash[key]); | |
| 491 if (vp == NULL) { | |
| 492 return NGX_CONF_ERROR; | |
| 493 } | |
| 494 | |
| 495 *vp = var; | |
| 496 | |
| 497 found: | |
| 498 | |
|
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499 if (ngx_strcmp(value[0].data, "default") == 0) { |
| 589 | 500 |
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501 if (ctx->default_value) { |
| 589 | 502 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
|
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503 "duplicate default map parameter"); |
| 589 | 504 return NGX_CONF_ERROR; |
| 505 } | |
| 506 | |
|
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507 ctx->default_value = var; |
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508 |
|
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509 return NGX_CONF_OK; |
| 589 | 510 } |
| 511 | |
|
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512 #if (NGX_PCRE) |
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513 |
|
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514 if (value[0].len && value[0].data[0] == '~') { |
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515 ngx_regex_compile_t rc; |
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516 ngx_http_map_regex_t *regex; |
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517 u_char errstr[NGX_MAX_CONF_ERRSTR]; |
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518 |
|
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519 regex = ngx_array_push(&ctx->regexes); |
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520 if (regex == NULL) { |
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521 return NGX_CONF_ERROR; |
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522 } |
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523 |
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524 value[0].len--; |
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525 value[0].data++; |
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526 |
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527 ngx_memzero(&rc, sizeof(ngx_regex_compile_t)); |
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528 |
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529 rc.pattern = value[0]; |
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530 rc.err.len = NGX_MAX_CONF_ERRSTR; |
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531 rc.err.data = errstr; |
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532 |
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533 regex->regex = ngx_http_regex_compile(ctx->cf, &rc); |
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534 if (regex->regex == NULL) { |
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535 return NGX_CONF_ERROR; |
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536 } |
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537 |
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538 regex->value = var; |
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539 |
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540 return NGX_CONF_OK; |
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541 } |
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542 |
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543 #endif |
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544 |
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545 if (value[0].len && value[0].data[0] == '\\') { |
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546 value[0].len--; |
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547 value[0].data++; |
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548 } |
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549 |
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550 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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551 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
| 589 | 552 |
| 591 | 553 if (rc == NGX_OK) { |
| 554 return NGX_CONF_OK; | |
| 555 } | |
| 589 | 556 |
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557 if (rc == NGX_DECLINED) { |
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558 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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559 "invalid hostname or wildcard \"%V\"", &value[0]); |
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560 } |
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561 |
| 591 | 562 if (rc == NGX_BUSY) { |
| 563 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 564 "conflicting parameter \"%V\"", &value[0]); | |
| 565 } | |
| 589 | 566 |
| 591 | 567 return NGX_CONF_ERROR; |
| 589 | 568 } |