Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_map_module.c @ 4852:9be0b6b749ae stable-1.2
Merge of r4785, r4795, r4811, r4812, r4816, r4822: coverity.
*) Resolver: fixed possible memory leak in ngx_resolver_create().
*) Explicitly ignore returned value from unlink() in ngx_open_tempfile().
*) Explicitly ignore returned value from close() in ngx_event_core_init_conf().
*) Added three missing checks for NULL after ngx_array_push() calls.
*) Crypt: fixed handling of corrupted SSHA entries in password file.
*) Mark logically dead code with corresponding comment.
Found by / prodded by Coverity.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 24 Sep 2012 18:54:28 +0000 |
parents | f8767b8032ba |
children | 0656cfe8f7cb |
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 ngx_array_t var_values; |
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24 #if (NGX_PCRE) |
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25 ngx_array_t regexes; |
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26 #endif |
589 | 27 |
28 ngx_http_variable_value_t *default_value; | |
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29 ngx_conf_t *cf; |
589 | 30 ngx_uint_t hostnames; /* unsigned hostnames:1 */ |
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; |
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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 if (map->hostnames && val.len > 0 && val.data[val.len - 1] == '.') { |
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124 val.len--; |
589 | 125 } |
126 | |
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127 value = ngx_http_map_find(r, &map->map, &val); |
589 | 128 |
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129 if (value == NULL) { |
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130 value = map->default_value; |
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131 } |
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132 |
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133 if (!value->valid) { |
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134 value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data); |
589 | 135 |
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136 if (value == NULL || value->not_found) { |
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137 value = &ngx_http_variable_null_value; |
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138 } |
589 | 139 } |
140 | |
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141 *v = *value; |
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142 |
589 | 143 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, |
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144 "http map: \"%v\" \"%v\"", &val, v); |
589 | 145 |
146 return NGX_OK; | |
147 } | |
148 | |
149 | |
150 static void * | |
151 ngx_http_map_create_conf(ngx_conf_t *cf) | |
152 { | |
153 ngx_http_map_conf_t *mcf; | |
154 | |
155 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t)); | |
156 if (mcf == NULL) { | |
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157 return NULL; |
589 | 158 } |
159 | |
160 mcf->hash_max_size = NGX_CONF_UNSET_UINT; | |
161 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT; | |
162 | |
163 return mcf; | |
164 } | |
165 | |
166 | |
167 static char * | |
168 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
169 { | |
170 ngx_http_map_conf_t *mcf = conf; | |
171 | |
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172 char *rv; |
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173 ngx_str_t *value, name; |
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174 ngx_conf_t save; |
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175 ngx_pool_t *pool; |
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176 ngx_hash_init_t hash; |
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177 ngx_http_map_ctx_t *map; |
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178 ngx_http_variable_t *var; |
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179 ngx_http_map_conf_ctx_t ctx; |
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180 ngx_http_compile_complex_value_t ccv; |
589 | 181 |
182 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) { | |
183 mcf->hash_max_size = 2048; | |
184 } | |
185 | |
186 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) { | |
187 mcf->hash_bucket_size = ngx_cacheline_size; | |
188 | |
189 } else { | |
190 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size, | |
191 ngx_cacheline_size); | |
192 } | |
193 | |
194 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t)); | |
195 if (map == NULL) { | |
196 return NGX_CONF_ERROR; | |
197 } | |
198 | |
199 value = cf->args->elts; | |
200 | |
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201 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
589 | 202 |
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203 ccv.cf = cf; |
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204 ccv.value = &value[1]; |
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205 ccv.complex_value = &map->value; |
589 | 206 |
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207 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
589 | 208 return NGX_CONF_ERROR; |
209 } | |
210 | |
211 name = value[2]; | |
212 name.len--; | |
213 name.data++; | |
214 | |
1565 | 215 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE); |
589 | 216 if (var == NULL) { |
217 return NGX_CONF_ERROR; | |
218 } | |
219 | |
637 | 220 var->get_handler = ngx_http_map_variable; |
589 | 221 var->data = (uintptr_t) map; |
222 | |
223 pool = ngx_create_pool(16384, cf->log); | |
224 if (pool == NULL) { | |
225 return NGX_CONF_ERROR; | |
226 } | |
227 | |
593 | 228 ctx.keys.pool = cf->pool; |
229 ctx.keys.temp_pool = pool; | |
589 | 230 |
593 | 231 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) { |
589 | 232 ngx_destroy_pool(pool); |
233 return NGX_CONF_ERROR; | |
234 } | |
235 | |
593 | 236 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize); |
589 | 237 if (ctx.values_hash == NULL) { |
238 ngx_destroy_pool(pool); | |
239 return NGX_CONF_ERROR; | |
240 } | |
241 | |
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242 if (ngx_array_init(&ctx.var_values, cf->pool, 2, |
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243 sizeof(ngx_http_variable_value_t)) |
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244 != NGX_OK) |
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245 { |
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246 ngx_destroy_pool(pool); |
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247 return NGX_CONF_ERROR; |
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248 } |
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249 |
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250 #if (NGX_PCRE) |
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251 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t)) |
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252 != NGX_OK) |
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253 { |
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254 ngx_destroy_pool(pool); |
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255 return NGX_CONF_ERROR; |
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256 } |
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257 #endif |
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258 |
589 | 259 ctx.default_value = NULL; |
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260 ctx.cf = &save; |
589 | 261 ctx.hostnames = 0; |
262 | |
263 save = *cf; | |
264 cf->pool = pool; | |
265 cf->ctx = &ctx; | |
266 cf->handler = ngx_http_map; | |
267 cf->handler_conf = conf; | |
268 | |
269 rv = ngx_conf_parse(cf, NULL); | |
270 | |
271 *cf = save; | |
272 | |
273 if (rv != NGX_CONF_OK) { | |
274 ngx_destroy_pool(pool); | |
275 return rv; | |
276 } | |
277 | |
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278 map->default_value = ctx.default_value ? ctx.default_value: |
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279 &ngx_http_variable_null_value; |
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280 |
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281 map->hostnames = ctx.hostnames; |
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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 | |
3116
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If .domain.com, .sub.domain.com, and .domain-some.com were defined,
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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 | |
3792
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405 if (value[1].data[0] == '$') { |
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406 name = value[1]; |
164a7f8df979
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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 } |
164a7f8df979
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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 | |
3872
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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 |
3930
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529 if (value[0].data[0] == '*') { |
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530 value[0].len--; |
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531 value[0].data++; |
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532 rc.options = NGX_REGEX_CASELESS; |
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533 } |
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534 |
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535 rc.pattern = value[0]; |
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536 rc.err.len = NGX_MAX_CONF_ERRSTR; |
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537 rc.err.data = errstr; |
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538 |
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539 regex->regex = ngx_http_regex_compile(ctx->cf, &rc); |
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540 if (regex->regex == NULL) { |
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541 return NGX_CONF_ERROR; |
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542 } |
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543 |
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544 regex->value = var; |
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545 |
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546 return NGX_CONF_OK; |
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547 } |
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548 |
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549 #endif |
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550 |
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551 if (value[0].len && value[0].data[0] == '\\') { |
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552 value[0].len--; |
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553 value[0].data++; |
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554 } |
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555 |
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556 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, |
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557 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0); |
589 | 558 |
591 | 559 if (rc == NGX_OK) { |
560 return NGX_CONF_OK; | |
561 } | |
589 | 562 |
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563 if (rc == NGX_DECLINED) { |
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564 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, |
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565 "invalid hostname or wildcard \"%V\"", &value[0]); |
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566 } |
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567 |
591 | 568 if (rc == NGX_BUSY) { |
569 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, | |
570 "conflicting parameter \"%V\"", &value[0]); | |
571 } | |
589 | 572 |
591 | 573 return NGX_CONF_ERROR; |
589 | 574 } |