138
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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138
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10 #include <ngx_http.h>
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11
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12
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13 typedef struct {
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14 ngx_uint_t hash_max_size;
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15 ngx_uint_t hash_bucket_size;
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16 } ngx_http_map_conf_t;
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17
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18
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19 typedef struct {
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142
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20 ngx_hash_keys_arrays_t keys;
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138
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21
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22 ngx_array_t *values_hash;
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604
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23 ngx_array_t var_values;
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616
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24 #if (NGX_PCRE)
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25 ngx_array_t regexes;
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26 #endif
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138
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27
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28 ngx_http_variable_value_t *default_value;
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604
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29 ngx_conf_t *cf;
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138
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30 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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31 } ngx_http_map_conf_ctx_t;
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32
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33
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34 typedef struct {
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616
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35 ngx_http_map_t map;
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604
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36 ngx_http_complex_value_t value;
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138
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37 ngx_http_variable_value_t *default_value;
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38 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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39 } ngx_http_map_ctx_t;
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40
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41
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42 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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43 const void *two);
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44 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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45 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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46 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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47
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48
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49 static ngx_command_t ngx_http_map_commands[] = {
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50
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51 { ngx_string("map"),
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52 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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53 ngx_http_map_block,
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54 NGX_HTTP_MAIN_CONF_OFFSET,
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55 0,
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56 NULL },
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57
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58 { ngx_string("map_hash_max_size"),
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59 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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60 ngx_conf_set_num_slot,
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61 NGX_HTTP_MAIN_CONF_OFFSET,
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62 offsetof(ngx_http_map_conf_t, hash_max_size),
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63 NULL },
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64
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65 { ngx_string("map_hash_bucket_size"),
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66 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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67 ngx_conf_set_num_slot,
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68 NGX_HTTP_MAIN_CONF_OFFSET,
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69 offsetof(ngx_http_map_conf_t, hash_bucket_size),
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70 NULL },
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71
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72 ngx_null_command
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73 };
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74
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75
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76 static ngx_http_module_t ngx_http_map_module_ctx = {
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77 NULL, /* preconfiguration */
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78 NULL, /* postconfiguration */
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79
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80 ngx_http_map_create_conf, /* create main configuration */
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81 NULL, /* init main configuration */
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82
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83 NULL, /* create server configuration */
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84 NULL, /* merge server configuration */
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85
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86 NULL, /* create location configuration */
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87 NULL /* merge location configuration */
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88 };
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89
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90
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91 ngx_module_t ngx_http_map_module = {
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92 NGX_MODULE_V1,
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93 &ngx_http_map_module_ctx, /* module context */
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94 ngx_http_map_commands, /* module directives */
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95 NGX_HTTP_MODULE, /* module type */
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96 NULL, /* init master */
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97 NULL, /* init module */
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98 NULL, /* init process */
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99 NULL, /* init thread */
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100 NULL, /* exit thread */
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101 NULL, /* exit process */
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102 NULL, /* exit master */
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103 NGX_MODULE_V1_PADDING
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104 };
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105
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106
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107 static ngx_int_t
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108 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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109 uintptr_t data)
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110 {
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111 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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112
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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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680
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123 if (map->hostnames && val.len > 0 && val.data[val.len - 1] == '.') {
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124 val.len--;
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138
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125 }
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126
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628
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127 value = ngx_http_map_find(r, &map->map, &val);
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604
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128
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129 if (value == NULL) {
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130 value = map->default_value;
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138
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131 }
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132
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604
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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);
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138
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135
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604
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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 }
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138
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139 }
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140
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604
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141 *v = *value;
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142
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138
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143 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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604
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144 "http map: \"%v\" \"%v\"", &val, v);
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138
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145
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146 return NGX_OK;
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147 }
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148
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149
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150 static void *
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151 ngx_http_map_create_conf(ngx_conf_t *cf)
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152 {
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153 ngx_http_map_conf_t *mcf;
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154
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155 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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156 if (mcf == NULL) {
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496
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157 return NULL;
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138
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158 }
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159
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160 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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161 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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162
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163 return mcf;
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164 }
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165
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166
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167 static char *
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168 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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169 {
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170 ngx_http_map_conf_t *mcf = conf;
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171
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604
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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;
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138
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181
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182 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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183 mcf->hash_max_size = 2048;
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184 }
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185
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186 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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187 mcf->hash_bucket_size = ngx_cacheline_size;
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188
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189 } else {
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190 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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191 ngx_cacheline_size);
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192 }
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193
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194 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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195 if (map == NULL) {
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196 return NGX_CONF_ERROR;
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197 }
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198
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199 value = cf->args->elts;
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200
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604
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201 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
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138
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202
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604
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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;
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138
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206
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604
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207 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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138
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208 return NGX_CONF_ERROR;
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209 }
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210
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211 name = value[2];
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694
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212
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213 if (name.data[0] != '$') {
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214 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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215 "invalid variable name \"%V\"", &name);
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216 return NGX_CONF_ERROR;
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217 }
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218
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138
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219 name.len--;
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220 name.data++;
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221
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340
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222 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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223 if (var == NULL) {
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224 return NGX_CONF_ERROR;
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225 }
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226
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186
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227 var->get_handler = ngx_http_map_variable;
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138
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228 var->data = (uintptr_t) map;
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229
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230 pool = ngx_create_pool(16384, cf->log);
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231 if (pool == NULL) {
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232 return NGX_CONF_ERROR;
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233 }
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234
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142
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235 ctx.keys.pool = cf->pool;
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236 ctx.keys.temp_pool = pool;
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138
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237
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142
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238 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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239 ngx_destroy_pool(pool);
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240 return NGX_CONF_ERROR;
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241 }
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242
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142
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243 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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244 if (ctx.values_hash == NULL) {
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245 ngx_destroy_pool(pool);
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246 return NGX_CONF_ERROR;
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247 }
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248
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604
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249 if (ngx_array_init(&ctx.var_values, cf->pool, 2,
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250 sizeof(ngx_http_variable_value_t))
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251 != NGX_OK)
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252 {
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253 ngx_destroy_pool(pool);
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254 return NGX_CONF_ERROR;
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255 }
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256
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616
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257 #if (NGX_PCRE)
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258 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t))
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259 != NGX_OK)
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260 {
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261 ngx_destroy_pool(pool);
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262 return NGX_CONF_ERROR;
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263 }
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264 #endif
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265
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138
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266 ctx.default_value = NULL;
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604
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267 ctx.cf = &save;
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138
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268 ctx.hostnames = 0;
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269
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270 save = *cf;
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271 cf->pool = pool;
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272 cf->ctx = &ctx;
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273 cf->handler = ngx_http_map;
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274 cf->handler_conf = conf;
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275
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276 rv = ngx_conf_parse(cf, NULL);
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277
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278 *cf = save;
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279
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280 if (rv != NGX_CONF_OK) {
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281 ngx_destroy_pool(pool);
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282 return rv;
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283 }
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284
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312
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285 map->default_value = ctx.default_value ? ctx.default_value:
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286 &ngx_http_variable_null_value;
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287
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680
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288 map->hostnames = ctx.hostnames;
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289
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138
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290 hash.key = ngx_hash_key_lc;
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291 hash.max_size = mcf->hash_max_size;
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292 hash.bucket_size = mcf->hash_bucket_size;
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293 hash.name = "map_hash";
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294 hash.pool = cf->pool;
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295
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142
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296 if (ctx.keys.keys.nelts) {
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616
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297 hash.hash = &map->map.hash.hash;
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138
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298 hash.temp_pool = NULL;
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299
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142
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300 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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140
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301 != NGX_OK)
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302 {
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142
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303 ngx_destroy_pool(pool);
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138
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304 return NGX_CONF_ERROR;
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305 }
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306 }
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307
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312
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308 if (ctx.keys.dns_wc_head.nelts) {
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138
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309
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312
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310 ngx_qsort(ctx.keys.dns_wc_head.elts,
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311 (size_t) ctx.keys.dns_wc_head.nelts,
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138
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312 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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313
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314 hash.hash = NULL;
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315 hash.temp_pool = pool;
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316
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312
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317 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts,
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318 ctx.keys.dns_wc_head.nelts)
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138
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319 != NGX_OK)
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320 {
|
142
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321 ngx_destroy_pool(pool);
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138
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322 return NGX_CONF_ERROR;
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323 }
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324
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616
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325 map->map.hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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312
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326 }
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327
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328 if (ctx.keys.dns_wc_tail.nelts) {
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329
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330 ngx_qsort(ctx.keys.dns_wc_tail.elts,
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331 (size_t) ctx.keys.dns_wc_tail.nelts,
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332 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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333
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334 hash.hash = NULL;
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335 hash.temp_pool = pool;
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336
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337 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts,
|
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338 ctx.keys.dns_wc_tail.nelts)
|
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339 != NGX_OK)
|
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340 {
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341 ngx_destroy_pool(pool);
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342 return NGX_CONF_ERROR;
|
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343 }
|
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344
|
616
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345 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
|
138
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346 }
|
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347
|
616
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348 #if (NGX_PCRE)
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349
|
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350 if (ctx.regexes.nelts) {
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351 map->map.regex = ctx.regexes.elts;
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352 map->map.nregex = ctx.regexes.nelts;
|
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353 }
|
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354
|
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355 #endif
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356
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138
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357 ngx_destroy_pool(pool);
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358
|
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359 return rv;
|
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360 }
|
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361
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362
|
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363 static int ngx_libc_cdecl
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364 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
|
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365 {
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366 ngx_hash_key_t *first, *second;
|
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367
|
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368 first = (ngx_hash_key_t *) one;
|
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369 second = (ngx_hash_key_t *) two;
|
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370
|
526
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371 return ngx_dns_strcmp(first->key.data, second->key.data);
|
138
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372 }
|
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373
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374
|
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375 static char *
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376 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
|
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377 {
|
604
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378 ngx_int_t rc, index;
|
686
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379 ngx_str_t *value, name;
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312
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380 ngx_uint_t i, key;
|
138
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381 ngx_http_map_conf_ctx_t *ctx;
|
140
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382 ngx_http_variable_value_t *var, **vp;
|
138
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383
|
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384 ctx = cf->ctx;
|
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385
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386 value = cf->args->elts;
|
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387
|
|
388 if (cf->args->nelts == 1
|
|
389 && ngx_strcmp(value[0].data, "hostnames") == 0)
|
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390 {
|
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391 ctx->hostnames = 1;
|
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392 return NGX_CONF_OK;
|
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393
|
|
394 } else if (cf->args->nelts != 2) {
|
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395 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
396 "invalid number of the map parameters");
|
|
397 return NGX_CONF_ERROR;
|
|
398 }
|
|
399
|
|
400 if (ngx_strcmp(value[0].data, "include") == 0) {
|
686
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401 return ngx_conf_include(cf, dummy, conf);
|
138
|
402 }
|
|
403
|
604
|
404 if (value[1].data[0] == '$') {
|
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405 name = value[1];
|
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406 name.len--;
|
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407 name.data++;
|
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408
|
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409 index = ngx_http_get_variable_index(ctx->cf, &name);
|
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410 if (index == NGX_ERROR) {
|
|
411 return NGX_CONF_ERROR;
|
|
412 }
|
|
413
|
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414 var = ctx->var_values.elts;
|
|
415
|
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416 for (i = 0; i < ctx->var_values.nelts; i++) {
|
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417 if (index == (ngx_int_t) var[i].data) {
|
684
|
418 var = &var[i];
|
604
|
419 goto found;
|
|
420 }
|
|
421 }
|
|
422
|
684
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423 var = ngx_array_push(&ctx->var_values);
|
604
|
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 goto found;
|
|
435 }
|
|
436
|
138
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437 key = 0;
|
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438
|
|
439 for (i = 0; i < value[1].len; i++) {
|
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440 key = ngx_hash(key, value[1].data[i]);
|
|
441 }
|
|
442
|
142
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443 key %= ctx->keys.hsize;
|
138
|
444
|
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445 vp = ctx->values_hash[key].elts;
|
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446
|
|
447 if (vp) {
|
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448 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
|
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449 if (value[1].len != (size_t) vp[i]->len) {
|
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450 continue;
|
|
451 }
|
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452
|
|
453 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
|
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454 var = vp[i];
|
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455 goto found;
|
|
456 }
|
|
457 }
|
|
458
|
|
459 } else {
|
|
460 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
461 sizeof(ngx_http_variable_value_t *))
|
|
462 != NGX_OK)
|
|
463 {
|
|
464 return NGX_CONF_ERROR;
|
|
465 }
|
|
466 }
|
|
467
|
142
|
468 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
138
|
469 if (var == NULL) {
|
|
470 return NGX_CONF_ERROR;
|
|
471 }
|
|
472
|
|
473 var->len = value[1].len;
|
142
|
474 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
138
|
475 if (var->data == NULL) {
|
|
476 return NGX_CONF_ERROR;
|
|
477 }
|
|
478
|
|
479 var->valid = 1;
|
340
|
480 var->no_cacheable = 0;
|
138
|
481 var->not_found = 0;
|
|
482
|
|
483 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
484 if (vp == NULL) {
|
|
485 return NGX_CONF_ERROR;
|
|
486 }
|
|
487
|
|
488 *vp = var;
|
|
489
|
|
490 found:
|
|
491
|
312
|
492 if (ngx_strcmp(value[0].data, "default") == 0) {
|
138
|
493
|
312
|
494 if (ctx->default_value) {
|
138
|
495 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
312
|
496 "duplicate default map parameter");
|
138
|
497 return NGX_CONF_ERROR;
|
|
498 }
|
|
499
|
312
|
500 ctx->default_value = var;
|
|
501
|
|
502 return NGX_CONF_OK;
|
138
|
503 }
|
|
504
|
616
|
505 #if (NGX_PCRE)
|
|
506
|
|
507 if (value[0].len && value[0].data[0] == '~') {
|
|
508 ngx_regex_compile_t rc;
|
|
509 ngx_http_map_regex_t *regex;
|
|
510 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
511
|
|
512 regex = ngx_array_push(&ctx->regexes);
|
|
513 if (regex == NULL) {
|
|
514 return NGX_CONF_ERROR;
|
|
515 }
|
|
516
|
|
517 value[0].len--;
|
|
518 value[0].data++;
|
|
519
|
|
520 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
|
|
521
|
628
|
522 if (value[0].data[0] == '*') {
|
|
523 value[0].len--;
|
|
524 value[0].data++;
|
|
525 rc.options = NGX_REGEX_CASELESS;
|
|
526 }
|
|
527
|
616
|
528 rc.pattern = value[0];
|
|
529 rc.err.len = NGX_MAX_CONF_ERRSTR;
|
|
530 rc.err.data = errstr;
|
|
531
|
|
532 regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
|
|
533 if (regex->regex == NULL) {
|
|
534 return NGX_CONF_ERROR;
|
|
535 }
|
|
536
|
|
537 regex->value = var;
|
|
538
|
|
539 return NGX_CONF_OK;
|
|
540 }
|
|
541
|
|
542 #endif
|
|
543
|
604
|
544 if (value[0].len && value[0].data[0] == '\\') {
|
312
|
545 value[0].len--;
|
|
546 value[0].data++;
|
|
547 }
|
|
548
|
|
549 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
550 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
138
|
551
|
140
|
552 if (rc == NGX_OK) {
|
|
553 return NGX_CONF_OK;
|
|
554 }
|
138
|
555
|
312
|
556 if (rc == NGX_DECLINED) {
|
|
557 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
558 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
559 }
|
|
560
|
140
|
561 if (rc == NGX_BUSY) {
|
|
562 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
563 "conflicting parameter \"%V\"", &value[0]);
|
|
564 }
|
138
|
565
|
140
|
566 return NGX_CONF_ERROR;
|
138
|
567 }
|