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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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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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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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212 name.len--;
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213 name.data++;
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214
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340
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215 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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216 if (var == NULL) {
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217 return NGX_CONF_ERROR;
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218 }
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219
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186
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220 var->get_handler = ngx_http_map_variable;
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138
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221 var->data = (uintptr_t) map;
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222
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223 pool = ngx_create_pool(16384, cf->log);
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224 if (pool == NULL) {
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225 return NGX_CONF_ERROR;
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226 }
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227
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142
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228 ctx.keys.pool = cf->pool;
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229 ctx.keys.temp_pool = pool;
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230
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142
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231 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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232 ngx_destroy_pool(pool);
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233 return NGX_CONF_ERROR;
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234 }
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235
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142
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236 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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237 if (ctx.values_hash == NULL) {
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238 ngx_destroy_pool(pool);
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239 return NGX_CONF_ERROR;
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240 }
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241
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604
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242 if (ngx_array_init(&ctx.var_values, cf->pool, 2,
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243 sizeof(ngx_http_variable_value_t))
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244 != NGX_OK)
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245 {
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246 ngx_destroy_pool(pool);
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247 return NGX_CONF_ERROR;
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248 }
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249
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616
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250 #if (NGX_PCRE)
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251 if (ngx_array_init(&ctx.regexes, cf->pool, 2, sizeof(ngx_http_map_regex_t))
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252 != NGX_OK)
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253 {
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254 ngx_destroy_pool(pool);
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255 return NGX_CONF_ERROR;
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256 }
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257 #endif
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258
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138
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259 ctx.default_value = NULL;
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260 ctx.cf = &save;
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261 ctx.hostnames = 0;
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262
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263 save = *cf;
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264 cf->pool = pool;
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265 cf->ctx = &ctx;
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266 cf->handler = ngx_http_map;
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267 cf->handler_conf = conf;
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268
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269 rv = ngx_conf_parse(cf, NULL);
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270
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271 *cf = save;
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272
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273 if (rv != NGX_CONF_OK) {
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274 ngx_destroy_pool(pool);
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275 return rv;
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276 }
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277
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312
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278 map->default_value = ctx.default_value ? ctx.default_value:
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279 &ngx_http_variable_null_value;
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280
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680
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281 map->hostnames = ctx.hostnames;
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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)
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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)
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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
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616
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338 map->map.hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
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138
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339 }
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340
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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
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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 {
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604
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371 ngx_int_t rc, index;
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372 ngx_str_t *value, file, name;
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312
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373 ngx_uint_t i, key;
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138
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374 ngx_http_map_conf_ctx_t *ctx;
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140
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375 ngx_http_variable_value_t *var, **vp;
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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
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381 if (cf->args->nelts == 1
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382 && ngx_strcmp(value[0].data, "hostnames") == 0)
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383 {
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384 ctx->hostnames = 1;
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385 return NGX_CONF_OK;
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386
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387 } else if (cf->args->nelts != 2) {
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388 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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389 "invalid number of the map parameters");
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390 return NGX_CONF_ERROR;
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391 }
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392
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393 if (ngx_strcmp(value[0].data, "include") == 0) {
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394 file = value[1];
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395
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582
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396 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
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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) {
|
|
684
|
419 var = &var[i];
|
|
604
|
420 goto found;
|
|
|
421 }
|
|
|
422 }
|
|
|
423
|
|
684
|
424 var = ngx_array_push(&ctx->var_values);
|
|
604
|
425 if (var == NULL) {
|
|
|
426 return NGX_CONF_ERROR;
|
|
|
427 }
|
|
|
428
|
|
|
429 var->valid = 0;
|
|
|
430 var->no_cacheable = 0;
|
|
|
431 var->not_found = 0;
|
|
|
432 var->len = 0;
|
|
|
433 var->data = (u_char *) index;
|
|
|
434
|
|
|
435 goto found;
|
|
|
436 }
|
|
|
437
|
|
138
|
438 key = 0;
|
|
|
439
|
|
|
440 for (i = 0; i < value[1].len; i++) {
|
|
|
441 key = ngx_hash(key, value[1].data[i]);
|
|
|
442 }
|
|
|
443
|
|
142
|
444 key %= ctx->keys.hsize;
|
|
138
|
445
|
|
|
446 vp = ctx->values_hash[key].elts;
|
|
|
447
|
|
|
448 if (vp) {
|
|
|
449 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
|
|
|
450 if (value[1].len != (size_t) vp[i]->len) {
|
|
|
451 continue;
|
|
|
452 }
|
|
|
453
|
|
|
454 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
|
|
|
455 var = vp[i];
|
|
|
456 goto found;
|
|
|
457 }
|
|
|
458 }
|
|
|
459
|
|
|
460 } else {
|
|
|
461 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
|
462 sizeof(ngx_http_variable_value_t *))
|
|
|
463 != NGX_OK)
|
|
|
464 {
|
|
|
465 return NGX_CONF_ERROR;
|
|
|
466 }
|
|
|
467 }
|
|
|
468
|
|
142
|
469 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
138
|
470 if (var == NULL) {
|
|
|
471 return NGX_CONF_ERROR;
|
|
|
472 }
|
|
|
473
|
|
|
474 var->len = value[1].len;
|
|
142
|
475 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
138
|
476 if (var->data == NULL) {
|
|
|
477 return NGX_CONF_ERROR;
|
|
|
478 }
|
|
|
479
|
|
|
480 var->valid = 1;
|
|
340
|
481 var->no_cacheable = 0;
|
|
138
|
482 var->not_found = 0;
|
|
|
483
|
|
|
484 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
485 if (vp == NULL) {
|
|
|
486 return NGX_CONF_ERROR;
|
|
|
487 }
|
|
|
488
|
|
|
489 *vp = var;
|
|
|
490
|
|
|
491 found:
|
|
|
492
|
|
312
|
493 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
138
|
494
|
|
312
|
495 if (ctx->default_value) {
|
|
138
|
496 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
312
|
497 "duplicate default map parameter");
|
|
138
|
498 return NGX_CONF_ERROR;
|
|
|
499 }
|
|
|
500
|
|
312
|
501 ctx->default_value = var;
|
|
|
502
|
|
|
503 return NGX_CONF_OK;
|
|
138
|
504 }
|
|
|
505
|
|
616
|
506 #if (NGX_PCRE)
|
|
|
507
|
|
|
508 if (value[0].len && value[0].data[0] == '~') {
|
|
|
509 ngx_regex_compile_t rc;
|
|
|
510 ngx_http_map_regex_t *regex;
|
|
|
511 u_char errstr[NGX_MAX_CONF_ERRSTR];
|
|
|
512
|
|
|
513 regex = ngx_array_push(&ctx->regexes);
|
|
|
514 if (regex == NULL) {
|
|
|
515 return NGX_CONF_ERROR;
|
|
|
516 }
|
|
|
517
|
|
|
518 value[0].len--;
|
|
|
519 value[0].data++;
|
|
|
520
|
|
|
521 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
|
|
|
522
|
|
628
|
523 if (value[0].data[0] == '*') {
|
|
|
524 value[0].len--;
|
|
|
525 value[0].data++;
|
|
|
526 rc.options = NGX_REGEX_CASELESS;
|
|
|
527 }
|
|
|
528
|
|
616
|
529 rc.pattern = value[0];
|
|
|
530 rc.err.len = NGX_MAX_CONF_ERRSTR;
|
|
|
531 rc.err.data = errstr;
|
|
|
532
|
|
|
533 regex->regex = ngx_http_regex_compile(ctx->cf, &rc);
|
|
|
534 if (regex->regex == NULL) {
|
|
|
535 return NGX_CONF_ERROR;
|
|
|
536 }
|
|
|
537
|
|
|
538 regex->value = var;
|
|
|
539
|
|
|
540 return NGX_CONF_OK;
|
|
|
541 }
|
|
|
542
|
|
|
543 #endif
|
|
|
544
|
|
604
|
545 if (value[0].len && value[0].data[0] == '\\') {
|
|
312
|
546 value[0].len--;
|
|
|
547 value[0].data++;
|
|
|
548 }
|
|
|
549
|
|
|
550 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
|
551 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
|
138
|
552
|
|
140
|
553 if (rc == NGX_OK) {
|
|
|
554 return NGX_CONF_OK;
|
|
|
555 }
|
|
138
|
556
|
|
312
|
557 if (rc == NGX_DECLINED) {
|
|
|
558 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
559 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
|
560 }
|
|
|
561
|
|
140
|
562 if (rc == NGX_BUSY) {
|
|
|
563 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
564 "conflicting parameter \"%V\"", &value[0]);
|
|
|
565 }
|
|
138
|
566
|
|
140
|
567 return NGX_CONF_ERROR;
|
|
138
|
568 }
|
