Mercurial > hg > nginx
annotate src/http/modules/ngx_http_map_module.c @ 3789:19c931be8b98
allow expressions in the first "map" parameter
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 25 Nov 2010 15:22:43 +0000 |
parents | ac33852faaac |
children | d8300807c4f3 |
rev | line source |
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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; |
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30 ngx_http_complex_value_t value; |
589 | 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; | |
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108 ngx_str_t val; |
2136 | 109 ngx_uint_t key; |
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110 ngx_http_variable_value_t *value; |
589 | 111 |
112 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
113 "http map started"); | |
114 | |
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115 if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) { |
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116 return NGX_ERROR; |
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117 } |
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118 |
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119 len = val.len; |
589 | 120 |
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121 if (len && map->hostnames && val.data[len - 1] == '.') { |
589 | 122 len--; |
123 } | |
124 | |
125 if (len == 0) { | |
126 *v = *map->default_value; | |
127 return NGX_OK; | |
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_hash_find_combined(&map->hash, key, val.data, len); |
589 | 133 |
134 if (value) { | |
135 *v = *value; | |
136 | |
137 } else { | |
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138 *v = *map->default_value; |
589 | 139 } |
140 | |
141 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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142 "http map: \"%v\" \"%v\"", &val, v); |
589 | 143 |
144 return NGX_OK; | |
145 } | |
146 | |
147 | |
148 static void * | |
149 ngx_http_map_create_conf(ngx_conf_t *cf) | |
150 { | |
151 ngx_http_map_conf_t *mcf; | |
152 | |
153 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
154 if (mcf == NULL) { | |
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155 return NULL; |
589 | 156 } |
157 | |
158 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
159 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
160 | |
161 return mcf; | |
162 } | |
163 | |
164 | |
165 static char * | |
166 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
167 { | |
168 ngx_http_map_conf_t *mcf = conf; | |
169 | |
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170 char *rv; |
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171 ngx_str_t *value, name; |
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172 ngx_conf_t save; |
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173 ngx_pool_t *pool; |
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174 ngx_hash_init_t hash; |
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175 ngx_http_map_ctx_t *map; |
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176 ngx_http_variable_t *var; |
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177 ngx_http_map_conf_ctx_t ctx; |
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178 ngx_http_compile_complex_value_t ccv; |
589 | 179 |
180 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) { | |
181 mcf->hash_max_size = 2048; | |
182 } | |
183 | |
184 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) { | |
185 mcf->hash_bucket_size = ngx_cacheline_size; | |
186 | |
187 } else { | |
188 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size, | |
189 ngx_cacheline_size); | |
190 } | |
191 | |
192 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t)); | |
193 if (map == NULL) { | |
194 return NGX_CONF_ERROR; | |
195 } | |
196 | |
197 value = cf->args->elts; | |
198 | |
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199 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
589 | 200 |
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201 ccv.cf = cf; |
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202 ccv.value = &value[1]; |
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203 ccv.complex_value = &map->value; |
589 | 204 |
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205 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
589 | 206 return NGX_CONF_ERROR; |
207 } | |
208 | |
209 name = value[2]; | |
210 name.len--; | |
211 name.data++; | |
212 | |
1565 | 213 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); |
589 | 214 if (var == NULL) { |
215 return NGX_CONF_ERROR; | |
216 } | |
217 | |
637 | 218 var->get_handler = ngx_http_map_variable; |
589 | 219 var->data = (uintptr_t) map; |
220 | |
221 pool = ngx_create_pool(16384, cf->log); | |
222 if (pool == NULL) { | |
223 return NGX_CONF_ERROR; | |
224 } | |
225 | |
593 | 226 ctx.keys.pool = cf->pool; |
227 ctx.keys.temp_pool = pool; | |
589 | 228 |
593 | 229 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) { |
589 | 230 ngx_destroy_pool(pool); |
231 return NGX_CONF_ERROR; | |
232 } | |
233 | |
593 | 234 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize); |
589 | 235 if (ctx.values_hash == NULL) { |
236 ngx_destroy_pool(pool); | |
237 return NGX_CONF_ERROR; | |
238 } | |
239 | |
240 ctx.default_value = NULL; | |
241 ctx.hostnames = 0; | |
242 | |
243 save = *cf; | |
244 cf->pool = pool; | |
245 cf->ctx = &ctx; | |
246 cf->handler = ngx_http_map; | |
247 cf->handler_conf = conf; | |
248 | |
249 rv = ngx_conf_parse(cf, NULL); | |
250 | |
251 *cf = save; | |
252 | |
253 if (rv != NGX_CONF_OK) { | |
254 ngx_destroy_pool(pool); | |
255 return rv; | |
256 } | |
257 | |
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258 map->default_value = ctx.default_value ? ctx.default_value: |
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259 &ngx_http_variable_null_value; |
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260 |
589 | 261 hash.key = ngx_hash_key_lc; |
262 hash.max_size = mcf->hash_max_size; | |
263 hash.bucket_size = mcf->hash_bucket_size; | |
264 hash.name = "map_hash"; | |
265 hash.pool = cf->pool; | |
266 | |
593 | 267 if (ctx.keys.keys.nelts) { |
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268 hash.hash = &map->hash.hash; |
589 | 269 hash.temp_pool = NULL; |
270 | |
593 | 271 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts) |
591 | 272 != NGX_OK) |
273 { | |
593 | 274 ngx_destroy_pool(pool); |
589 | 275 return NGX_CONF_ERROR; |
276 } | |
277 } | |
278 | |
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279 if (ctx.keys.dns_wc_head.nelts) { |
589 | 280 |
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281 ngx_qsort(ctx.keys.dns_wc_head.elts, |
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282 (size_t) ctx.keys.dns_wc_head.nelts, |
589 | 283 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
284 | |
285 hash.hash = NULL; | |
286 hash.temp_pool = pool; | |
287 | |
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288 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts, |
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289 ctx.keys.dns_wc_head.nelts) |
589 | 290 != NGX_OK) |
291 { | |
593 | 292 ngx_destroy_pool(pool); |
589 | 293 return NGX_CONF_ERROR; |
294 } | |
295 | |
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296 map->hash.wc_head = (ngx_hash_wildcard_t *) hash.hash; |
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297 } |
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298 |
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299 if (ctx.keys.dns_wc_tail.nelts) { |
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300 |
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301 ngx_qsort(ctx.keys.dns_wc_tail.elts, |
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302 (size_t) ctx.keys.dns_wc_tail.nelts, |
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303 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards); |
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304 |
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305 hash.hash = NULL; |
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306 hash.temp_pool = pool; |
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307 |
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308 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts, |
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309 ctx.keys.dns_wc_tail.nelts) |
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310 != NGX_OK) |
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311 { |
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312 ngx_destroy_pool(pool); |
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313 return NGX_CONF_ERROR; |
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314 } |
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315 |
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316 map->hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash; |
589 | 317 } |
318 | |
319 ngx_destroy_pool(pool); | |
320 | |
321 return rv; | |
322 } | |
323 | |
324 | |
325 static int ngx_libc_cdecl | |
326 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two) | |
327 { | |
328 ngx_hash_key_t *first, *second; | |
329 | |
330 first = (ngx_hash_key_t *) one; | |
331 second = (ngx_hash_key_t *) two; | |
332 | |
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333 return ngx_dns_strcmp(first->key.data, second->key.data); |
589 | 334 } |
335 | |
336 | |
337 static char * | |
338 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf) | |
339 { | |
591 | 340 ngx_int_t rc; |
341 ngx_str_t *value, file; | |
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342 ngx_uint_t i, key; |
589 | 343 ngx_http_map_conf_ctx_t *ctx; |
591 | 344 ngx_http_variable_value_t *var, **vp; |
589 | 345 |
346 ctx = cf->ctx; | |
347 | |
348 value = cf->args->elts; | |
349 | |
350 if (cf->args->nelts == 1 | |
351 && ngx_strcmp(value[0].data, "hostnames") == 0) | |
352 { | |
353 ctx->hostnames = 1; | |
354 return NGX_CONF_OK; | |
355 | |
356 } else if (cf->args->nelts != 2) { | |
357 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
358 "invalid number of the map parameters"); | |
359 return NGX_CONF_ERROR; | |
360 | |
361 } else if (value[0].len == 0) { | |
362 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
363 "invalid first parameter"); | |
364 return NGX_CONF_ERROR; | |
365 } | |
366 | |
367 if (ngx_strcmp(value[0].data, "include") == 0) { | |
368 file = value[1]; | |
369 | |
3642 | 370 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) { |
589 | 371 return NGX_CONF_ERROR; |
372 } | |
373 | |
374 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data); | |
375 | |
376 return ngx_conf_parse(cf, &file); | |
377 } | |
378 | |
379 key = 0; | |
380 | |
381 for (i = 0; i < value[1].len; i++) { | |
382 key = ngx_hash(key, value[1].data[i]); | |
383 } | |
384 | |
593 | 385 key %= ctx->keys.hsize; |
589 | 386 |
387 vp = ctx->values_hash[key].elts; | |
388 | |
389 if (vp) { | |
390 for (i = 0; i < ctx->values_hash[key].nelts; i++) { | |
391 if (value[1].len != (size_t) vp[i]->len) { | |
392 continue; | |
393 } | |
394 | |
395 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) { | |
396 var = vp[i]; | |
397 goto found; | |
398 } | |
399 } | |
400 | |
401 } else { | |
402 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4, | |
403 sizeof(ngx_http_variable_value_t *)) | |
404 != NGX_OK) | |
405 { | |
406 return NGX_CONF_ERROR; | |
407 } | |
408 } | |
409 | |
593 | 410 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t)); |
589 | 411 if (var == NULL) { |
412 return NGX_CONF_ERROR; | |
413 } | |
414 | |
415 var->len = value[1].len; | |
593 | 416 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]); |
589 | 417 if (var->data == NULL) { |
418 return NGX_CONF_ERROR; | |
419 } | |
420 | |
421 var->valid = 1; | |
1565 | 422 var->no_cacheable = 0; |
589 | 423 var->not_found = 0; |
424 | |
425 vp = ngx_array_push(&ctx->values_hash[key]); | |
426 if (vp == NULL) { | |
427 return NGX_CONF_ERROR; | |
428 } | |
429 | |
430 *vp = var; | |
431 | |
432 found: | |
433 | |
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434 if (ngx_strcmp(value[0].data, "default") == 0) { |
589 | 435 |
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436 if (ctx->default_value) { |
589 | 437 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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438 "duplicate default map parameter"); |
589 | 439 return NGX_CONF_ERROR; |
440 } | |
441 | |
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442 ctx->default_value = var; |
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443 |
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444 return NGX_CONF_OK; |
589 | 445 } |
446 | |
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447 if (value[0].len && value[0].data[0] == '!') { |
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448 value[0].len--; |
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449 value[0].data++; |
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450 } |
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451 |
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452 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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453 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
589 | 454 |
591 | 455 if (rc == NGX_OK) { |
456 return NGX_CONF_OK; | |
457 } | |
589 | 458 |
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459 if (rc == NGX_DECLINED) { |
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460 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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461 "invalid hostname or wildcard \"%V\"", &value[0]); |
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462 } |
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463 |
591 | 464 if (rc == NGX_BUSY) { |
465 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
466 "conflicting parameter \"%V\"", &value[0]); | |
467 } | |
589 | 468 |
591 | 469 return NGX_CONF_ERROR; |
589 | 470 } |