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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138
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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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114 ngx_http_variable_value_t *value;
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138
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115
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116 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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117 "http map started");
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118
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604
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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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250
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121 }
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122
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604
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123 len = val.len;
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138
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124
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604
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125 if (len && map->hostnames && val.data[len - 1] == '.') {
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138
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126 len--;
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127 }
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128
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628
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129 value = ngx_http_map_find(r, &map->map, &val);
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604
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130
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131 if (value == NULL) {
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132 value = map->default_value;
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138
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133 }
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134
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604
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135 if (!value->valid) {
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136 value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data);
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138
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137
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604
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138 if (value == NULL || value->not_found) {
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139 value = &ngx_http_variable_null_value;
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140 }
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138
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141 }
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142
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604
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143 *v = *value;
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144
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138
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145 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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604
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146 "http map: \"%v\" \"%v\"", &val, v);
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138
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147
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148 return NGX_OK;
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149 }
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150
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151
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152 static void *
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153 ngx_http_map_create_conf(ngx_conf_t *cf)
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154 {
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155 ngx_http_map_conf_t *mcf;
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156
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157 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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158 if (mcf == NULL) {
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496
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159 return NULL;
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138
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160 }
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161
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162 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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163 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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164
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165 return mcf;
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166 }
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167
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168
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169 static char *
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170 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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171 {
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172 ngx_http_map_conf_t *mcf = conf;
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173
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604
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174 char *rv;
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175 ngx_str_t *value, name;
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176 ngx_conf_t save;
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177 ngx_pool_t *pool;
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178 ngx_hash_init_t hash;
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179 ngx_http_map_ctx_t *map;
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180 ngx_http_variable_t *var;
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181 ngx_http_map_conf_ctx_t ctx;
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182 ngx_http_compile_complex_value_t ccv;
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138
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183
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184 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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185 mcf->hash_max_size = 2048;
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186 }
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187
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188 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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189 mcf->hash_bucket_size = ngx_cacheline_size;
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190
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191 } else {
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192 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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193 ngx_cacheline_size);
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194 }
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195
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196 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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197 if (map == NULL) {
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198 return NGX_CONF_ERROR;
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199 }
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200
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201 value = cf->args->elts;
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202
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604
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203 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
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138
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204
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604
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205 ccv.cf = cf;
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206 ccv.value = &value[1];
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207 ccv.complex_value = &map->value;
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138
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208
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604
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209 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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138
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210 return NGX_CONF_ERROR;
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211 }
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212
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213 name = value[2];
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214 name.len--;
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215 name.data++;
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216
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340
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217 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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218 if (var == NULL) {
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219 return NGX_CONF_ERROR;
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220 }
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221
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186
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222 var->get_handler = ngx_http_map_variable;
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138
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223 var->data = (uintptr_t) map;
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224
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225 pool = ngx_create_pool(16384, cf->log);
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226 if (pool == NULL) {
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227 return NGX_CONF_ERROR;
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228 }
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229
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142
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230 ctx.keys.pool = cf->pool;
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231 ctx.keys.temp_pool = pool;
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138
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232
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142
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233 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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234 ngx_destroy_pool(pool);
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235 return NGX_CONF_ERROR;
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236 }
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237
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142
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238 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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239 if (ctx.values_hash == NULL) {
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240 ngx_destroy_pool(pool);
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241 return NGX_CONF_ERROR;
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242 }
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243
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604
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244 if (ngx_array_init(&ctx.var_values, cf->pool, 2,
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245 sizeof(ngx_http_variable_value_t))
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246 != NGX_OK)
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247 {
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248 ngx_destroy_pool(pool);
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249 return NGX_CONF_ERROR;
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250 }
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251
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616
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252 #if (NGX_PCRE)
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253 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t))
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254 != NGX_OK)
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255 {
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256 ngx_destroy_pool(pool);
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257 return NGX_CONF_ERROR;
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258 }
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259 #endif
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260
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138
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261 ctx.default_value = NULL;
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604
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262 ctx.cf = &save;
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138
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263 ctx.hostnames = 0;
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264
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265 save = *cf;
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266 cf->pool = pool;
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267 cf->ctx = &ctx;
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268 cf->handler = ngx_http_map;
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269 cf->handler_conf = conf;
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270
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271 rv = ngx_conf_parse(cf, NULL);
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272
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273 *cf = save;
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274
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275 if (rv != NGX_CONF_OK) {
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276 ngx_destroy_pool(pool);
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277 return rv;
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278 }
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279
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312
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280 map->default_value = ctx.default_value ? ctx.default_value:
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281 &ngx_http_variable_null_value;
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282
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138
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283 hash.key = ngx_hash_key_lc;
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284 hash.max_size = mcf->hash_max_size;
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285 hash.bucket_size = mcf->hash_bucket_size;
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286 hash.name = "map_hash";
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287 hash.pool = cf->pool;
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288
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142
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289 if (ctx.keys.keys.nelts) {
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616
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290 hash.hash = &map->map.hash.hash;
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138
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291 hash.temp_pool = NULL;
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292
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142
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293 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
|
140
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294 != NGX_OK)
|
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295 {
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142
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296 ngx_destroy_pool(pool);
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138
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297 return NGX_CONF_ERROR;
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298 }
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299 }
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300
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312
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301 if (ctx.keys.dns_wc_head.nelts) {
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138
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302
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312
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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,
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138
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305 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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306
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307 hash.hash = NULL;
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308 hash.temp_pool = pool;
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309
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312
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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)
|
138
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312 != NGX_OK)
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313 {
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142
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314 ngx_destroy_pool(pool);
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138
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315 return NGX_CONF_ERROR;
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316 }
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317
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616
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318 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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312
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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
|
616
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338 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
|
138
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339 }
|
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340
|
616
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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
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138
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350 ngx_destroy_pool(pool);
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351
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352 return rv;
|
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353 }
|
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354
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355
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356 static int ngx_libc_cdecl
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357 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
|
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358 {
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359 ngx_hash_key_t *first, *second;
|
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360
|
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361 first = (ngx_hash_key_t *) one;
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362 second = (ngx_hash_key_t *) two;
|
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363
|
526
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364 return ngx_dns_strcmp(first->key.data, second->key.data);
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138
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365 }
|
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366
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367
|
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368 static char *
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369 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
|
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370 {
|
604
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371 ngx_int_t rc, index;
|
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372 ngx_str_t *value, file, name;
|
312
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373 ngx_uint_t i, key;
|
138
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374 ngx_http_map_conf_ctx_t *ctx;
|
140
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375 ngx_http_variable_value_t *var, **vp;
|
138
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376
|
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377 ctx = cf->ctx;
|
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378
|
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379 value = cf->args->elts;
|
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380
|
|
381 if (cf->args->nelts == 1
|
|
382 && ngx_strcmp(value[0].data, "hostnames") == 0)
|
|
383 {
|
|
384 ctx->hostnames = 1;
|
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385 return NGX_CONF_OK;
|
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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
|
582
|
396 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
|
138
|
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
|
604
|
405 if (value[1].data[0] == '$') {
|
|
406 name = value[1];
|
|
407 name.len--;
|
|
408 name.data++;
|
|
409
|
|
410 index = ngx_http_get_variable_index(ctx->cf, &name);
|
|
411 if (index == NGX_ERROR) {
|
|
412 return NGX_CONF_ERROR;
|
|
413 }
|
|
414
|
|
415 var = ctx->var_values.elts;
|
|
416
|
|
417 for (i = 0; i < ctx->var_values.nelts; i++) {
|
|
418 if (index == (ngx_int_t) var[i].data) {
|
|
419 goto found;
|
|
420 }
|
|
421 }
|
|
422
|
|
423 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
424 if (var == NULL) {
|
|
425 return NGX_CONF_ERROR;
|
|
426 }
|
|
427
|
|
428 var->valid = 0;
|
|
429 var->no_cacheable = 0;
|
|
430 var->not_found = 0;
|
|
431 var->len = 0;
|
|
432 var->data = (u_char *) index;
|
|
433
|
|
434 vp = ngx_array_push(&ctx->var_values);
|
|
435 if (vp == NULL) {
|
|
436 return NGX_CONF_ERROR;
|
|
437 }
|
|
438
|
|
439 *vp = var;
|
|
440
|
|
441 goto found;
|
|
442 }
|
|
443
|
138
|
444 key = 0;
|
|
445
|
|
446 for (i = 0; i < value[1].len; i++) {
|
|
447 key = ngx_hash(key, value[1].data[i]);
|
|
448 }
|
|
449
|
142
|
450 key %= ctx->keys.hsize;
|
138
|
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
|
142
|
475 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
138
|
476 if (var == NULL) {
|
|
477 return NGX_CONF_ERROR;
|
|
478 }
|
|
479
|
|
480 var->len = value[1].len;
|
142
|
481 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
138
|
482 if (var->data == NULL) {
|
|
483 return NGX_CONF_ERROR;
|
|
484 }
|
|
485
|
|
486 var->valid = 1;
|
340
|
487 var->no_cacheable = 0;
|
138
|
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
|
312
|
499 if (ngx_strcmp(value[0].data, "default") == 0) {
|
138
|
500
|
312
|
501 if (ctx->default_value) {
|
138
|
502 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
312
|
503 "duplicate default map parameter");
|
138
|
504 return NGX_CONF_ERROR;
|
|
505 }
|
|
506
|
312
|
507 ctx->default_value = var;
|
|
508
|
|
509 return NGX_CONF_OK;
|
138
|
510 }
|
|
511
|
616
|
512 #if (NGX_PCRE)
|
|
513
|
|
514 if (value[0].len && value[0].data[0] == '~') {
|
|
515 ngx_regex_compile_t rc;
|
|
516 ngx_http_map_regex_t *regex;
|
|
517 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
518
|
|
519 regex = ngx_array_push(&ctx->regexes);
|
|
520 if (regex == NULL) {
|
|
521 return NGX_CONF_ERROR;
|
|
522 }
|
|
523
|
|
524 value[0].len--;
|
|
525 value[0].data++;
|
|
526
|
|
527 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
|
|
528
|
628
|
529 if (value[0].data[0] == '*') {
|
|
530 value[0].len--;
|
|
531 value[0].data++;
|
|
532 rc.options = NGX_REGEX_CASELESS;
|
|
533 }
|
|
534
|
616
|
535 rc.pattern = value[0];
|
|
536 rc.err.len = NGX_MAX_CONF_ERRSTR;
|
|
537 rc.err.data = errstr;
|
|
538
|
|
539 regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
|
|
540 if (regex->regex == NULL) {
|
|
541 return NGX_CONF_ERROR;
|
|
542 }
|
|
543
|
|
544 regex->value = var;
|
|
545
|
|
546 return NGX_CONF_OK;
|
|
547 }
|
|
548
|
|
549 #endif
|
|
550
|
604
|
551 if (value[0].len && value[0].data[0] == '\\') {
|
312
|
552 value[0].len--;
|
|
553 value[0].data++;
|
|
554 }
|
|
555
|
|
556 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
557 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
138
|
558
|
140
|
559 if (rc == NGX_OK) {
|
|
560 return NGX_CONF_OK;
|
|
561 }
|
138
|
562
|
312
|
563 if (rc == NGX_DECLINED) {
|
|
564 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
565 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
566 }
|
|
567
|
140
|
568 if (rc == NGX_BUSY) {
|
|
569 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
570 "conflicting parameter \"%V\"", &value[0]);
|
|
571 }
|
138
|
572
|
140
|
573 return NGX_CONF_ERROR;
|
138
|
574 }
|