Mercurial > hg > nginx
annotate src/http/modules/ngx_http_map_module.c @ 3116:98e288c6dac3
If .domain.com, .sub.domain.com, and .domain-some.com were defined,
then .sub.domain.com was matched by .domain.com: wildcard names hash
was built incorrectly due to sorting order issue of "." vs "-".
They were sorted as
com.domain com.domain-some com.domain.sub
while they should be sorted as
com.domain com.domain.sub com.domain-some
for correct hash building
| author | Igor Sysoev <igor@sysoev.ru> |
|---|---|
| date | Sat, 12 Sep 2009 09:28:37 +0000 |
| parents | c7d57b539248 |
| children | ac33852faaac |
| 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; | |
| 22 | |
| 23 ngx_http_variable_value_t *default_value; | |
| 24 ngx_uint_t hostnames; /* unsigned hostnames:1 */ | |
| 25 } ngx_http_map_conf_ctx_t; | |
| 26 | |
| 27 | |
| 28 typedef struct { | |
|
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29 ngx_hash_combined_t hash; |
| 589 | 30 ngx_int_t index; |
| 31 ngx_http_variable_value_t *default_value; | |
| 32 ngx_uint_t hostnames; /* unsigned hostnames:1 */ | |
| 33 } ngx_http_map_ctx_t; | |
| 34 | |
| 35 | |
| 36 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one, | |
| 37 const void *two); | |
| 38 static void *ngx_http_map_create_conf(ngx_conf_t *cf); | |
| 39 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); | |
| 40 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf); | |
| 41 | |
| 42 | |
| 43 static ngx_command_t ngx_http_map_commands[] = { | |
| 44 | |
| 45 { ngx_string("map"), | |
| 46 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2, | |
| 47 ngx_http_map_block, | |
| 48 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 49 0, | |
| 50 NULL }, | |
| 51 | |
| 52 { ngx_string("map_hash_max_size"), | |
| 53 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
| 54 ngx_conf_set_num_slot, | |
| 55 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 56 offsetof(ngx_http_map_conf_t, hash_max_size), | |
| 57 NULL }, | |
| 58 | |
| 59 { ngx_string("map_hash_bucket_size"), | |
| 60 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1, | |
| 61 ngx_conf_set_num_slot, | |
| 62 NGX_HTTP_MAIN_CONF_OFFSET, | |
| 63 offsetof(ngx_http_map_conf_t, hash_bucket_size), | |
| 64 NULL }, | |
| 65 | |
| 66 ngx_null_command | |
| 67 }; | |
| 68 | |
| 69 | |
| 70 static ngx_http_module_t ngx_http_map_module_ctx = { | |
| 71 NULL, /* preconfiguration */ | |
| 72 NULL, /* postconfiguration */ | |
| 73 | |
| 74 ngx_http_map_create_conf, /* create main configuration */ | |
| 75 NULL, /* init main configuration */ | |
| 76 | |
| 77 NULL, /* create server configuration */ | |
| 78 NULL, /* merge server configuration */ | |
| 79 | |
| 80 NULL, /* create location configuration */ | |
| 81 NULL /* merge location configuration */ | |
| 82 }; | |
| 83 | |
| 84 | |
| 85 ngx_module_t ngx_http_map_module = { | |
| 86 NGX_MODULE_V1, | |
| 87 &ngx_http_map_module_ctx, /* module context */ | |
| 88 ngx_http_map_commands, /* module directives */ | |
| 89 NGX_HTTP_MODULE, /* module type */ | |
| 90 NULL, /* init master */ | |
| 91 NULL, /* init module */ | |
| 92 NULL, /* init process */ | |
| 93 NULL, /* init thread */ | |
| 94 NULL, /* exit thread */ | |
| 95 NULL, /* exit process */ | |
| 96 NULL, /* exit master */ | |
| 97 NGX_MODULE_V1_PADDING | |
| 98 }; | |
| 99 | |
| 100 | |
| 101 static ngx_int_t | |
| 102 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v, | |
| 103 uintptr_t data) | |
| 104 { | |
| 105 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data; | |
| 106 | |
| 107 size_t len; | |
| 108 u_char *name; | |
| 2136 | 109 ngx_uint_t key; |
| 589 | 110 ngx_http_variable_value_t *vv, *value; |
| 111 | |
| 112 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
| 113 "http map started"); | |
| 114 | |
| 115 vv = ngx_http_get_flushed_variable(r, map->index); | |
| 116 | |
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117 if (vv == NULL || vv->not_found) { |
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118 *v = *map->default_value; |
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119 return NGX_OK; |
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120 } |
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121 |
| 589 | 122 len = vv->len; |
| 123 | |
| 124 if (len && map->hostnames && vv->data[len - 1] == '.') { | |
| 125 len--; | |
| 126 } | |
| 127 | |
| 128 if (len == 0) { | |
| 129 *v = *map->default_value; | |
| 130 return NGX_OK; | |
| 131 } | |
| 132 | |
| 2049 | 133 name = ngx_pnalloc(r->pool, len); |
| 589 | 134 if (name == NULL) { |
| 135 return NGX_ERROR; | |
| 136 } | |
| 137 | |
| 2136 | 138 key = ngx_hash_strlow(name, vv->data, len); |
| 589 | 139 |
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140 value = ngx_hash_find_combined(&map->hash, key, name, len); |
| 589 | 141 |
| 142 if (value) { | |
| 143 *v = *value; | |
| 144 | |
| 145 } else { | |
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146 *v = *map->default_value; |
| 589 | 147 } |
| 148 | |
| 149 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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150 "http map: \"%v\" \"%v\"", vv, v); |
| 589 | 151 |
| 152 return NGX_OK; | |
| 153 } | |
| 154 | |
| 155 | |
| 156 static void * | |
| 157 ngx_http_map_create_conf(ngx_conf_t *cf) | |
| 158 { | |
| 159 ngx_http_map_conf_t *mcf; | |
| 160 | |
| 161 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
| 162 if (mcf == NULL) { | |
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163 return NULL; |
| 589 | 164 } |
| 165 | |
| 166 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
| 167 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
| 168 | |
| 169 return mcf; | |
| 170 } | |
| 171 | |
| 172 | |
| 173 static char * | |
| 174 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
| 175 { | |
| 176 ngx_http_map_conf_t *mcf = conf; | |
| 177 | |
| 178 char *rv; | |
| 179 ngx_str_t *value, name; | |
| 180 ngx_conf_t save; | |
| 181 ngx_pool_t *pool; | |
| 182 ngx_hash_init_t hash; | |
| 183 ngx_http_map_ctx_t *map; | |
| 184 ngx_http_variable_t *var; | |
| 185 ngx_http_map_conf_ctx_t ctx; | |
| 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 | |
| 206 name = value[1]; | |
| 207 name.len--; | |
| 208 name.data++; | |
| 209 | |
| 210 map->index = ngx_http_get_variable_index(cf, &name); | |
| 211 | |
| 212 if (map->index == NGX_ERROR) { | |
| 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 | |
| 247 ctx.default_value = NULL; | |
| 248 ctx.hostnames = 0; | |
| 249 | |
| 250 save = *cf; | |
| 251 cf->pool = pool; | |
| 252 cf->ctx = &ctx; | |
| 253 cf->handler = ngx_http_map; | |
| 254 cf->handler_conf = conf; | |
| 255 | |
| 256 rv = ngx_conf_parse(cf, NULL); | |
| 257 | |
| 258 *cf = save; | |
| 259 | |
| 260 if (rv != NGX_CONF_OK) { | |
| 261 ngx_destroy_pool(pool); | |
| 262 return rv; | |
| 263 } | |
| 264 | |
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265 map->default_value = ctx.default_value ? ctx.default_value: |
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266 &ngx_http_variable_null_value; |
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267 |
| 589 | 268 hash.key = ngx_hash_key_lc; |
| 269 hash.max_size = mcf->hash_max_size; | |
| 270 hash.bucket_size = mcf->hash_bucket_size; | |
| 271 hash.name = "map_hash"; | |
| 272 hash.pool = cf->pool; | |
| 273 | |
| 593 | 274 if (ctx.keys.keys.nelts) { |
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275 hash.hash = &map->hash.hash; |
| 589 | 276 hash.temp_pool = NULL; |
| 277 | |
| 593 | 278 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts) |
| 591 | 279 != NGX_OK) |
| 280 { | |
| 593 | 281 ngx_destroy_pool(pool); |
| 589 | 282 return NGX_CONF_ERROR; |
| 283 } | |
| 284 } | |
| 285 | |
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286 if (ctx.keys.dns_wc_head.nelts) { |
| 589 | 287 |
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288 ngx_qsort(ctx.keys.dns_wc_head.elts, |
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289 (size_t) ctx.keys.dns_wc_head.nelts, |
| 589 | 290 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
| 291 | |
| 292 hash.hash = NULL; | |
| 293 hash.temp_pool = pool; | |
| 294 | |
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295 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts, |
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296 ctx.keys.dns_wc_head.nelts) |
| 589 | 297 != NGX_OK) |
| 298 { | |
| 593 | 299 ngx_destroy_pool(pool); |
| 589 | 300 return NGX_CONF_ERROR; |
| 301 } | |
| 302 | |
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303 map->hash.wc_head = (ngx_hash_wildcard_t *) hash.hash; |
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304 } |
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305 |
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306 if (ctx.keys.dns_wc_tail.nelts) { |
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307 |
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308 ngx_qsort(ctx.keys.dns_wc_tail.elts, |
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309 (size_t) ctx.keys.dns_wc_tail.nelts, |
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310 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
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311 |
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312 hash.hash = NULL; |
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313 hash.temp_pool = pool; |
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314 |
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315 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts, |
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316 ctx.keys.dns_wc_tail.nelts) |
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317 != NGX_OK) |
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318 { |
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319 ngx_destroy_pool(pool); |
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320 return NGX_CONF_ERROR; |
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321 } |
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322 |
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323 map->hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash; |
| 589 | 324 } |
| 325 | |
| 326 ngx_destroy_pool(pool); | |
| 327 | |
| 328 return rv; | |
| 329 } | |
| 330 | |
| 331 | |
| 332 static int ngx_libc_cdecl | |
| 333 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two) | |
| 334 { | |
| 335 ngx_hash_key_t *first, *second; | |
| 336 | |
| 337 first = (ngx_hash_key_t *) one; | |
| 338 second = (ngx_hash_key_t *) two; | |
| 339 | |
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340 return ngx_dns_strcmp(first->key.data, second->key.data); |
| 589 | 341 } |
| 342 | |
| 343 | |
| 344 static char * | |
| 345 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) | |
| 346 { | |
| 591 | 347 ngx_int_t rc; |
| 348 ngx_str_t *value, file; | |
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349 ngx_uint_t i, key; |
| 589 | 350 ngx_http_map_conf_ctx_t *ctx; |
| 591 | 351 ngx_http_variable_value_t *var, **vp; |
| 589 | 352 |
| 353 ctx = cf->ctx; | |
| 354 | |
| 355 value = cf->args->elts; | |
| 356 | |
| 357 if (cf->args->nelts == 1 | |
| 358 && ngx_strcmp(value[0].data, "hostnames") == 0) | |
| 359 { | |
| 360 ctx->hostnames = 1; | |
| 361 return NGX_CONF_OK; | |
| 362 | |
| 363 } else if (cf->args->nelts != 2) { | |
| 364 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 365 "invalid number of the map parameters"); | |
| 366 return NGX_CONF_ERROR; | |
| 367 | |
| 368 } else if (value[0].len == 0) { | |
| 369 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 370 "invalid first parameter"); | |
| 371 return NGX_CONF_ERROR; | |
| 372 } | |
| 373 | |
| 374 if (ngx_strcmp(value[0].data, "include") == 0) { | |
| 375 file = value[1]; | |
| 376 | |
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377 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK){ |
| 589 | 378 return NGX_CONF_ERROR; |
| 379 } | |
| 380 | |
| 381 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data); | |
| 382 | |
| 383 return ngx_conf_parse(cf, &file); | |
| 384 } | |
| 385 | |
| 386 key = 0; | |
| 387 | |
| 388 for (i = 0; i < value[1].len; i++) { | |
| 389 key = ngx_hash(key, value[1].data[i]); | |
| 390 } | |
| 391 | |
| 593 | 392 key %= ctx->keys.hsize; |
| 589 | 393 |
| 394 vp = ctx->values_hash[key].elts; | |
| 395 | |
| 396 if (vp) { | |
| 397 for (i = 0; i < ctx->values_hash[key].nelts; i++) { | |
| 398 if (value[1].len != (size_t) vp[i]->len) { | |
| 399 continue; | |
| 400 } | |
| 401 | |
| 402 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) { | |
| 403 var = vp[i]; | |
| 404 goto found; | |
| 405 } | |
| 406 } | |
| 407 | |
| 408 } else { | |
| 409 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4, | |
| 410 sizeof(ngx_http_variable_value_t *)) | |
| 411 != NGX_OK) | |
| 412 { | |
| 413 return NGX_CONF_ERROR; | |
| 414 } | |
| 415 } | |
| 416 | |
| 593 | 417 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
| 589 | 418 if (var == NULL) { |
| 419 return NGX_CONF_ERROR; | |
| 420 } | |
| 421 | |
| 422 var->len = value[1].len; | |
| 593 | 423 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]); |
| 589 | 424 if (var->data == NULL) { |
| 425 return NGX_CONF_ERROR; | |
| 426 } | |
| 427 | |
| 428 var->valid = 1; | |
| 1565 | 429 var->no_cacheable = 0; |
| 589 | 430 var->not_found = 0; |
| 431 | |
| 432 vp = ngx_array_push(&ctx->values_hash[key]); | |
| 433 if (vp == NULL) { | |
| 434 return NGX_CONF_ERROR; | |
| 435 } | |
| 436 | |
| 437 *vp = var; | |
| 438 | |
| 439 found: | |
| 440 | |
|
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441 if (ngx_strcmp(value[0].data, "default") == 0) { |
| 589 | 442 |
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443 if (ctx->default_value) { |
| 589 | 444 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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445 "duplicate default map parameter"); |
| 589 | 446 return NGX_CONF_ERROR; |
| 447 } | |
| 448 | |
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449 ctx->default_value = var; |
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450 |
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451 return NGX_CONF_OK; |
| 589 | 452 } |
| 453 | |
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454 if (value[0].len && value[0].data[0] == '!') { |
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455 value[0].len--; |
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456 value[0].data++; |
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457 } |
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458 |
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459 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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460 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
| 589 | 461 |
| 591 | 462 if (rc == NGX_OK) { |
| 463 return NGX_CONF_OK; | |
| 464 } | |
| 589 | 465 |
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466 if (rc == NGX_DECLINED) { |
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467 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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468 "invalid hostname or wildcard \"%V\"", &value[0]); |
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469 } |
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470 |
| 591 | 471 if (rc == NGX_BUSY) { |
| 472 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
| 473 "conflicting parameter \"%V\"", &value[0]); | |
| 474 } | |
| 589 | 475 |
| 591 | 476 return NGX_CONF_ERROR; |
| 589 | 477 } |