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138
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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13 ngx_uint_t hash_max_size;
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14 ngx_uint_t hash_bucket_size;
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15 } ngx_http_map_conf_t;
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16
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17
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18 typedef struct {
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142
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19 ngx_hash_keys_arrays_t keys;
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138
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20
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21 ngx_array_t *values_hash;
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604
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22 ngx_array_t var_values;
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616
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23 #if (NGX_PCRE)
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24 ngx_array_t regexes;
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25 #endif
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138
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26
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27 ngx_http_variable_value_t *default_value;
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604
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28 ngx_conf_t *cf;
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138
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29 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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30 } ngx_http_map_conf_ctx_t;
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31
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32
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33 typedef struct {
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616
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34 ngx_http_map_t map;
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604
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35 ngx_http_complex_value_t value;
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36 ngx_http_variable_value_t *default_value;
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37 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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38 } ngx_http_map_ctx_t;
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39
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40
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41 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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42 const void *two);
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43 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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44 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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45 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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46
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47
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48 static ngx_command_t ngx_http_map_commands[] = {
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49
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50 { ngx_string("map"),
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51 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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52 ngx_http_map_block,
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53 NGX_HTTP_MAIN_CONF_OFFSET,
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54 0,
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55 NULL },
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56
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57 { ngx_string("map_hash_max_size"),
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58 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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59 ngx_conf_set_num_slot,
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60 NGX_HTTP_MAIN_CONF_OFFSET,
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61 offsetof(ngx_http_map_conf_t, hash_max_size),
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62 NULL },
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63
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64 { ngx_string("map_hash_bucket_size"),
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65 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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66 ngx_conf_set_num_slot,
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67 NGX_HTTP_MAIN_CONF_OFFSET,
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68 offsetof(ngx_http_map_conf_t, hash_bucket_size),
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69 NULL },
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70
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71 ngx_null_command
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72 };
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73
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74
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75 static ngx_http_module_t ngx_http_map_module_ctx = {
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76 NULL, /* preconfiguration */
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77 NULL, /* postconfiguration */
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78
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79 ngx_http_map_create_conf, /* create main configuration */
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80 NULL, /* init main configuration */
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81
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82 NULL, /* create server configuration */
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83 NULL, /* merge server configuration */
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84
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85 NULL, /* create location configuration */
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86 NULL /* merge location configuration */
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87 };
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88
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89
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90 ngx_module_t ngx_http_map_module = {
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91 NGX_MODULE_V1,
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92 &ngx_http_map_module_ctx, /* module context */
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93 ngx_http_map_commands, /* module directives */
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94 NGX_HTTP_MODULE, /* module type */
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95 NULL, /* init master */
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96 NULL, /* init module */
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97 NULL, /* init process */
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98 NULL, /* init thread */
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99 NULL, /* exit thread */
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100 NULL, /* exit process */
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101 NULL, /* exit master */
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102 NGX_MODULE_V1_PADDING
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103 };
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104
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105
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106 static ngx_int_t
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107 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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108 uintptr_t data)
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109 {
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110 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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111
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112 size_t len;
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604
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113 ngx_str_t val;
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392
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114 ngx_uint_t key;
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604
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115 ngx_http_variable_value_t *value;
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138
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116
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117 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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118 "http map started");
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119
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604
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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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250
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122 }
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123
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604
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124 len = val.len;
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138
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125
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604
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126 if (len && map->hostnames && val.data[len - 1] == '.') {
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127 len--;
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128 }
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129
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130 key = ngx_hash_strlow(val.data, val.data, len);
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138
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131
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132 value = ngx_http_map_find(r, &map->map, key, val.data, len, &val);
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604
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133
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134 if (value == NULL) {
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135 value = map->default_value;
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138
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136 }
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137
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604
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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);
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138
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140
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604
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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 }
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138
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144 }
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145
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604
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146 *v = *value;
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147
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138
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148 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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604
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149 "http map: \"%v\" \"%v\"", &val, v);
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138
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150
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151 return NGX_OK;
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152 }
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153
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154
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155 static void *
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156 ngx_http_map_create_conf(ngx_conf_t *cf)
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157 {
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158 ngx_http_map_conf_t *mcf;
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159
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160 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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161 if (mcf == NULL) {
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496
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162 return NULL;
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138
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163 }
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164
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165 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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166 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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167
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168 return mcf;
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169 }
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170
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171
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172 static char *
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173 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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174 {
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175 ngx_http_map_conf_t *mcf = conf;
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176
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604
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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;
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138
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186
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187 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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188 mcf->hash_max_size = 2048;
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189 }
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190
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191 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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192 mcf->hash_bucket_size = ngx_cacheline_size;
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193
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194 } else {
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195 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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196 ngx_cacheline_size);
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197 }
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198
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199 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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200 if (map == NULL) {
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201 return NGX_CONF_ERROR;
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202 }
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203
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204 value = cf->args->elts;
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205
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206 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
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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;
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211
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212 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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213 return NGX_CONF_ERROR;
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214 }
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215
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216 name = value[2];
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217 name.len--;
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218 name.data++;
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219
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340
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220 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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221 if (var == NULL) {
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222 return NGX_CONF_ERROR;
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223 }
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224
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186
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225 var->get_handler = ngx_http_map_variable;
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226 var->data = (uintptr_t) map;
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227
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228 pool = ngx_create_pool(16384, cf->log);
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229 if (pool == NULL) {
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230 return NGX_CONF_ERROR;
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231 }
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232
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142
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233 ctx.keys.pool = cf->pool;
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234 ctx.keys.temp_pool = pool;
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138
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235
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142
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236 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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237 ngx_destroy_pool(pool);
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238 return NGX_CONF_ERROR;
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239 }
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240
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142
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241 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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242 if (ctx.values_hash == NULL) {
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243 ngx_destroy_pool(pool);
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244 return NGX_CONF_ERROR;
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245 }
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246
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604
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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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616
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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
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264 ctx.default_value = NULL;
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265 ctx.cf = &save;
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138
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266 ctx.hostnames = 0;
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267
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268 save = *cf;
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269 cf->pool = pool;
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270 cf->ctx = &ctx;
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271 cf->handler = ngx_http_map;
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272 cf->handler_conf = conf;
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273
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274 rv = ngx_conf_parse(cf, NULL);
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275
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276 *cf = save;
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277
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278 if (rv != NGX_CONF_OK) {
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279 ngx_destroy_pool(pool);
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280 return rv;
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281 }
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282
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312
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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
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138
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286 hash.key = ngx_hash_key_lc;
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287 hash.max_size = mcf->hash_max_size;
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288 hash.bucket_size = mcf->hash_bucket_size;
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289 hash.name = "map_hash";
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290 hash.pool = cf->pool;
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291
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142
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292 if (ctx.keys.keys.nelts) {
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616
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293 hash.hash = &map->map.hash.hash;
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138
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294 hash.temp_pool = NULL;
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295
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142
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296 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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140
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297 != NGX_OK)
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298 {
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142
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299 ngx_destroy_pool(pool);
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138
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300 return NGX_CONF_ERROR;
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301 }
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302 }
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303
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312
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304 if (ctx.keys.dns_wc_head.nelts) {
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138
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305
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312
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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,
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138
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308 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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309
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310 hash.hash = NULL;
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311 hash.temp_pool = pool;
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312
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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)
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138
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315 != NGX_OK)
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316 {
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142
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317 ngx_destroy_pool(pool);
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138
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318 return NGX_CONF_ERROR;
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319 }
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320
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616
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321 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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312
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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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616
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341 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
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138
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342 }
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343
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616
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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
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138
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353 ngx_destroy_pool(pool);
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354
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355 return rv;
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356 }
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357
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358
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359 static int ngx_libc_cdecl
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360 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
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361 {
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362 ngx_hash_key_t *first, *second;
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363
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364 first = (ngx_hash_key_t *) one;
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365 second = (ngx_hash_key_t *) two;
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366
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526
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367 return ngx_dns_strcmp(first->key.data, second->key.data);
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138
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368 }
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369
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370
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371 static char *
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372 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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373 {
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604
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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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312
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376 ngx_uint_t i, key;
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138
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377 ngx_http_map_conf_ctx_t *ctx;
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140
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378 ngx_http_variable_value_t *var, **vp;
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138
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379
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380 ctx = cf->ctx;
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381
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382 value = cf->args->elts;
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383
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384 if (cf->args->nelts == 1
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385 && ngx_strcmp(value[0].data, "hostnames") == 0)
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386 {
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387 ctx->hostnames = 1;
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388 return NGX_CONF_OK;
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389
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390 } else if (cf->args->nelts != 2) {
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391 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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392 "invalid number of the map parameters");
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393 return NGX_CONF_ERROR;
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394 }
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395
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396 if (ngx_strcmp(value[0].data, "include") == 0) {
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397 file = value[1];
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|
398
|
|
582
|
399 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
|
|
138
|
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
|
|
604
|
408 if (value[1].data[0] == '$') {
|
|
|
409 name = value[1];
|
|
|
410 name.len--;
|
|
|
411 name.data++;
|
|
|
412
|
|
|
413 index = ngx_http_get_variable_index(ctx->cf, &name);
|
|
|
414 if (index == NGX_ERROR) {
|
|
|
415 return NGX_CONF_ERROR;
|
|
|
416 }
|
|
|
417
|
|
|
418 var = ctx->var_values.elts;
|
|
|
419
|
|
|
420 for (i = 0; i < ctx->var_values.nelts; i++) {
|
|
|
421 if (index == (ngx_int_t) var[i].data) {
|
|
|
422 goto found;
|
|
|
423 }
|
|
|
424 }
|
|
|
425
|
|
|
426 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
|
427 if (var == NULL) {
|
|
|
428 return NGX_CONF_ERROR;
|
|
|
429 }
|
|
|
430
|
|
|
431 var->valid = 0;
|
|
|
432 var->no_cacheable = 0;
|
|
|
433 var->not_found = 0;
|
|
|
434 var->len = 0;
|
|
|
435 var->data = (u_char *) index;
|
|
|
436
|
|
|
437 vp = ngx_array_push(&ctx->var_values);
|
|
|
438 if (vp == NULL) {
|
|
|
439 return NGX_CONF_ERROR;
|
|
|
440 }
|
|
|
441
|
|
|
442 *vp = var;
|
|
|
443
|
|
|
444 goto found;
|
|
|
445 }
|
|
|
446
|
|
138
|
447 key = 0;
|
|
|
448
|
|
|
449 for (i = 0; i < value[1].len; i++) {
|
|
|
450 key = ngx_hash(key, value[1].data[i]);
|
|
|
451 }
|
|
|
452
|
|
142
|
453 key %= ctx->keys.hsize;
|
|
138
|
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
|
|
142
|
478 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
138
|
479 if (var == NULL) {
|
|
|
480 return NGX_CONF_ERROR;
|
|
|
481 }
|
|
|
482
|
|
|
483 var->len = value[1].len;
|
|
142
|
484 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
138
|
485 if (var->data == NULL) {
|
|
|
486 return NGX_CONF_ERROR;
|
|
|
487 }
|
|
|
488
|
|
|
489 var->valid = 1;
|
|
340
|
490 var->no_cacheable = 0;
|
|
138
|
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
|
|
312
|
502 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
138
|
503
|
|
312
|
504 if (ctx->default_value) {
|
|
138
|
505 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
312
|
506 "duplicate default map parameter");
|
|
138
|
507 return NGX_CONF_ERROR;
|
|
|
508 }
|
|
|
509
|
|
312
|
510 ctx->default_value = var;
|
|
|
511
|
|
|
512 return NGX_CONF_OK;
|
|
138
|
513 }
|
|
|
514
|
|
616
|
515 #if (NGX_PCRE)
|
|
|
516
|
|
|
517 if (value[0].len && value[0].data[0] == '~') {
|
|
|
518 ngx_regex_compile_t rc;
|
|
|
519 ngx_http_map_regex_t *regex;
|
|
|
520 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
|
521
|
|
|
522 regex = ngx_array_push(&ctx->regexes);
|
|
|
523 if (regex == NULL) {
|
|
|
524 return NGX_CONF_ERROR;
|
|
|
525 }
|
|
|
526
|
|
|
527 value[0].len--;
|
|
|
528 value[0].data++;
|
|
|
529
|
|
|
530 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
|
|
|
531
|
|
|
532 rc.pattern = value[0];
|
|
|
533 rc.err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
534 rc.err.data = errstr;
|
|
|
535
|
|
|
536 regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
|
|
|
537 if (regex->regex == NULL) {
|
|
|
538 return NGX_CONF_ERROR;
|
|
|
539 }
|
|
|
540
|
|
|
541 regex->value = var;
|
|
|
542
|
|
|
543 return NGX_CONF_OK;
|
|
|
544 }
|
|
|
545
|
|
|
546 #endif
|
|
|
547
|
|
604
|
548 if (value[0].len && value[0].data[0] == '\\') {
|
|
312
|
549 value[0].len--;
|
|
|
550 value[0].data++;
|
|
|
551 }
|
|
|
552
|
|
|
553 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
|
554 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
|
138
|
555
|
|
140
|
556 if (rc == NGX_OK) {
|
|
|
557 return NGX_CONF_OK;
|
|
|
558 }
|
|
138
|
559
|
|
312
|
560 if (rc == NGX_DECLINED) {
|
|
|
561 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
562 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
|
563 }
|
|
|
564
|
|
140
|
565 if (rc == NGX_BUSY) {
|
|
|
566 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
567 "conflicting parameter \"%V\"", &value[0]);
|
|
|
568 }
|
|
138
|
569
|
|
140
|
570 return NGX_CONF_ERROR;
|
|
138
|
571 }
|
