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138
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 #define NGX_HTTP_MAP_HASH 10007
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13
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14 typedef struct {
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15 ngx_uint_t hash_max_size;
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16 ngx_uint_t hash_bucket_size;
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17 } ngx_http_map_conf_t;
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18
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19
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20 typedef struct {
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21 ngx_pool_t *pool;
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22
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23 ngx_array_t keys;
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24 ngx_array_t *keys_hash;
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25
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26 ngx_array_t dns_wildcards;
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27 ngx_array_t *dns_hash;
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28
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29 ngx_array_t *values_hash;
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30
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31 ngx_http_variable_value_t *default_value;
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32 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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33 } ngx_http_map_conf_ctx_t;
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34
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35
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36 typedef struct {
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37 ngx_hash_t hash;
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38 ngx_hash_wildcard_t *dns_wildcards;
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39 ngx_int_t index;
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40 ngx_http_variable_value_t *default_value;
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41 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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42 } ngx_http_map_ctx_t;
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43
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44
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45 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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46 const void *two);
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47 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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48 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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49 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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50
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51
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52 static ngx_command_t ngx_http_map_commands[] = {
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53
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54 { ngx_string("map"),
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55 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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56 ngx_http_map_block,
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57 NGX_HTTP_MAIN_CONF_OFFSET,
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58 0,
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59 NULL },
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60
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61 { ngx_string("map_hash_max_size"),
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62 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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63 ngx_conf_set_num_slot,
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64 NGX_HTTP_MAIN_CONF_OFFSET,
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65 offsetof(ngx_http_map_conf_t, hash_max_size),
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66 NULL },
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67
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68 { ngx_string("map_hash_bucket_size"),
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69 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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70 ngx_conf_set_num_slot,
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71 NGX_HTTP_MAIN_CONF_OFFSET,
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72 offsetof(ngx_http_map_conf_t, hash_bucket_size),
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73 NULL },
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74
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75 ngx_null_command
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76 };
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77
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78
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79 static ngx_http_module_t ngx_http_map_module_ctx = {
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80 NULL, /* preconfiguration */
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81 NULL, /* postconfiguration */
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82
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83 ngx_http_map_create_conf, /* create main configuration */
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84 NULL, /* init main configuration */
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85
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86 NULL, /* create server configuration */
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87 NULL, /* merge server configuration */
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88
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89 NULL, /* create location configuration */
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90 NULL /* merge location configuration */
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91 };
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92
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93
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94 ngx_module_t ngx_http_map_module = {
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95 NGX_MODULE_V1,
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96 &ngx_http_map_module_ctx, /* module context */
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97 ngx_http_map_commands, /* module directives */
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98 NGX_HTTP_MODULE, /* module type */
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99 NULL, /* init master */
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100 NULL, /* init module */
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101 NULL, /* init process */
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102 NULL, /* init thread */
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103 NULL, /* exit thread */
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104 NULL, /* exit process */
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105 NULL, /* exit master */
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106 NGX_MODULE_V1_PADDING
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107 };
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108
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109
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110 static ngx_int_t
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111 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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112 uintptr_t data)
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113 {
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114 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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115
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116 size_t len;
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117 u_char *name;
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118 ngx_uint_t key, i;
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119 ngx_http_variable_value_t *vv, *value;
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120
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121 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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122 "http map started");
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123
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124 vv = ngx_http_get_flushed_variable(r, map->index);
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125
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126 len = vv->len;
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127
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128 if (len && map->hostnames && vv->data[len - 1] == '.') {
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129 len--;
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130 }
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131
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132 if (len == 0) {
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133 *v = *map->default_value;
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134 return NGX_OK;
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135 }
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136
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137 name = ngx_palloc(r->pool, len);
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138 if (name == NULL) {
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139 return NGX_ERROR;
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140 }
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141
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142 key = 0;
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143 for (i = 0; i < len; i++) {
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144 name[i] = ngx_tolower(vv->data[i]);
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145 key = ngx_hash(key, name[i]);
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146 }
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147
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148 value = NULL;
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149
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150 if (map->hash.buckets) {
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151 value = ngx_hash_find(&map->hash, key, name, len);
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152 }
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153
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154 if (value) {
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155 *v = *value;
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156
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157 } else {
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158 if (map->dns_wildcards && map->dns_wildcards->hash.buckets) {
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159 value = ngx_hash_find_wildcard(map->dns_wildcards, name, len);
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160 if (value) {
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161 *v = *value;
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162
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163 } else {
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164 *v = *map->default_value;
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165 }
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166
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167 } else {
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168 *v = *map->default_value;
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169 }
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170 }
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171
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172 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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173 "http map: \"%V\" \"%V\"", vv, v);
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174
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175 return NGX_OK;
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176 }
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177
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178
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179 static void *
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180 ngx_http_map_create_conf(ngx_conf_t *cf)
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181 {
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182 ngx_http_map_conf_t *mcf;
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183
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184 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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185 if (mcf == NULL) {
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186 return NGX_CONF_ERROR;
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187 }
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188
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189 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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190 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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191
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192 return mcf;
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193 }
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194
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195
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196 static char *
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197 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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198 {
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199 ngx_http_map_conf_t *mcf = conf;
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200
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201 char *rv;
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202 ngx_str_t *value, name;
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203 ngx_conf_t save;
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204 ngx_pool_t *pool;
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205 ngx_hash_init_t hash;
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206 ngx_http_map_ctx_t *map;
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207 ngx_http_variable_t *var;
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208 ngx_http_map_conf_ctx_t ctx;
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209
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210 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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211 mcf->hash_max_size = 2048;
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212 }
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213
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214 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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215 mcf->hash_bucket_size = ngx_cacheline_size;
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216
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217 } else {
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218 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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219 ngx_cacheline_size);
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220 }
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221
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222 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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223 if (map == NULL) {
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224 return NGX_CONF_ERROR;
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225 }
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226
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227 value = cf->args->elts;
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228
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229 name = value[1];
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230 name.len--;
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231 name.data++;
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232
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233 map->index = ngx_http_get_variable_index(cf, &name);
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234
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235 if (map->index == NGX_ERROR) {
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236 return NGX_CONF_ERROR;
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237 }
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238
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239 name = value[2];
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240 name.len--;
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241 name.data++;
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242
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243 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
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244 if (var == NULL) {
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245 return NGX_CONF_ERROR;
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246 }
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247
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248 var->handler = ngx_http_map_variable;
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249 var->data = (uintptr_t) map;
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250
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251 pool = ngx_create_pool(16384, cf->log);
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252 if (pool == NULL) {
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253 return NGX_CONF_ERROR;
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254 }
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255
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256 if (ngx_array_init(&ctx.keys, pool, 16384, sizeof(ngx_hash_key_t))
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257 != NGX_OK)
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258 {
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259 ngx_destroy_pool(pool);
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260 return NGX_CONF_ERROR;
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261 }
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262
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263 if (ngx_array_init(&ctx.dns_wildcards, pool, 16384, sizeof(ngx_hash_key_t))
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264 != NGX_OK)
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265 {
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266 ngx_destroy_pool(pool);
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267 return NGX_CONF_ERROR;
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268 }
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269
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270 ctx.keys_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * NGX_HTTP_MAP_HASH);
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271 if (ctx.keys_hash == NULL) {
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272 ngx_destroy_pool(pool);
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273 return NGX_CONF_ERROR;
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274 }
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275
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276 ctx.dns_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * NGX_HTTP_MAP_HASH);
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277 if (ctx.dns_hash == NULL) {
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278 ngx_destroy_pool(pool);
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279 return NGX_CONF_ERROR;
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280 }
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281
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282 ctx.values_hash = ngx_pcalloc(pool,
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283 sizeof(ngx_array_t) * NGX_HTTP_MAP_HASH);
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284 if (ctx.values_hash == NULL) {
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285 ngx_destroy_pool(pool);
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286 return NGX_CONF_ERROR;
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287 }
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288
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289 ctx.pool = cf->pool;
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290 ctx.default_value = NULL;
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291 ctx.hostnames = 0;
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292
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293 save = *cf;
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294 cf->pool = pool;
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295 cf->ctx = &ctx;
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296 cf->handler = ngx_http_map;
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297 cf->handler_conf = conf;
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298
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299 rv = ngx_conf_parse(cf, NULL);
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300
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301 *cf = save;
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302
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303 if (rv != NGX_CONF_OK) {
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304 ngx_destroy_pool(pool);
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305
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306 return rv;
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307 }
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308
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309 hash.key = ngx_hash_key_lc;
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310 hash.max_size = mcf->hash_max_size;
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311 hash.bucket_size = mcf->hash_bucket_size;
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312 hash.name = "map_hash";
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313 hash.pool = cf->pool;
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314
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315 if (ctx.keys.nelts) {
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316 hash.hash = &map->hash;
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317 hash.temp_pool = NULL;
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318
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319 if (ngx_hash_init(&hash, ctx.keys.elts, ctx.keys.nelts) != NGX_OK) {
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320 return NGX_CONF_ERROR;
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321 }
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322 }
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323
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324 map->default_value = ctx.default_value ? ctx.default_value:
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325 &ngx_http_variable_null_value;
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326
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327 if (ctx.dns_wildcards.nelts) {
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328
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329 ngx_qsort(ctx.dns_wildcards.elts, (size_t) ctx.dns_wildcards.nelts,
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330 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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331
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332 hash.hash = NULL;
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333 hash.temp_pool = pool;
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334
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335 if (ngx_hash_wildcard_init(&hash, ctx.dns_wildcards.elts,
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336 ctx.dns_wildcards.nelts)
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337 != NGX_OK)
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338 {
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339 return NGX_CONF_ERROR;
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340 }
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341
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342 map->dns_wildcards = (ngx_hash_wildcard_t *) hash.hash;
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343 }
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344
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345 ngx_destroy_pool(pool);
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346
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347 return rv;
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348 }
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349
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350
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351 static int ngx_libc_cdecl
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352 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
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353 {
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354 ngx_hash_key_t *first, *second;
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355
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356 first = (ngx_hash_key_t *) one;
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357 second = (ngx_hash_key_t *) two;
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358
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359 return ngx_strcmp(first->key.data, second->key.data);
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360 }
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361
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362
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363 static char *
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364 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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365 {
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366 size_t len;
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367 ngx_str_t *value, file, *name;
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368 ngx_uint_t i, n, key;
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369 ngx_hash_key_t *m;
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370 ngx_http_map_conf_ctx_t *ctx;
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371 ngx_http_variable_value_t *var, *old, **vp;
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372 u_char buf[2048];
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373
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374 ctx = cf->ctx;
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375
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376 value = cf->args->elts;
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377
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378 if (cf->args->nelts == 1
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379 && ngx_strcmp(value[0].data, "hostnames") == 0)
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380 {
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381 ctx->hostnames = 1;
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382 return NGX_CONF_OK;
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383
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384 } else if (cf->args->nelts != 2) {
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385 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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386 "invalid number of the map parameters");
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387 return NGX_CONF_ERROR;
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388
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389 } else if (value[0].len == 0) {
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390 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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391 "invalid first parameter");
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392 return NGX_CONF_ERROR;
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393 }
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394
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395 if (ngx_strcmp(value[0].data, "include") == 0) {
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396 file = value[1];
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397
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398 if (ngx_conf_full_name(cf->cycle, &file) == NGX_ERROR){
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399 return NGX_CONF_ERROR;
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400 }
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401
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402 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
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403
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404 return ngx_conf_parse(cf, &file);
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405 }
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406
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407 key = 0;
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408
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409 for (i = 0; i < value[1].len; i++) {
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410 key = ngx_hash(key, value[1].data[i]);
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411 }
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412
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413 key %= NGX_HTTP_MAP_HASH;
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414
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415 vp = ctx->values_hash[key].elts;
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416
|
|
|
417 if (vp) {
|
|
|
418 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
|
|
|
419 if (value[1].len != (size_t) vp[i]->len) {
|
|
|
420 continue;
|
|
|
421 }
|
|
|
422
|
|
|
423 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
|
|
|
424 var = vp[i];
|
|
|
425 goto found;
|
|
|
426 }
|
|
|
427 }
|
|
|
428
|
|
|
429 } else {
|
|
|
430 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
|
431 sizeof(ngx_http_variable_value_t *))
|
|
|
432 != NGX_OK)
|
|
|
433 {
|
|
|
434 return NGX_CONF_ERROR;
|
|
|
435 }
|
|
|
436 }
|
|
|
437
|
|
|
438 var = ngx_palloc(ctx->pool, sizeof(ngx_http_variable_value_t));
|
|
|
439 if (var == NULL) {
|
|
|
440 return NGX_CONF_ERROR;
|
|
|
441 }
|
|
|
442
|
|
|
443 var->len = value[1].len;
|
|
|
444 var->data = ngx_pstrdup(ctx->pool, &value[1]);
|
|
|
445 if (var->data == NULL) {
|
|
|
446 return NGX_CONF_ERROR;
|
|
|
447 }
|
|
|
448
|
|
|
449 var->valid = 1;
|
|
|
450 var->no_cachable = 0;
|
|
|
451 var->not_found = 0;
|
|
|
452
|
|
|
453 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
454 if (vp == NULL) {
|
|
|
455 return NGX_CONF_ERROR;
|
|
|
456 }
|
|
|
457
|
|
|
458 *vp = var;
|
|
|
459
|
|
|
460 found:
|
|
|
461
|
|
|
462 if (value[0].data[0] != '*' || ctx->hostnames == 0) {
|
|
|
463
|
|
|
464 if (ngx_strcmp(value[0].data, "default") != 0) {
|
|
|
465
|
|
|
466 if (value[0].len && value[0].data[0] == '!') {
|
|
|
467 value[0].len--;
|
|
|
468 value[0].data++;
|
|
|
469 }
|
|
|
470
|
|
|
471 key = 0;
|
|
|
472
|
|
|
473 for (i = 0; i < value[0].len; i++) {
|
|
|
474 value[0].data[i] = ngx_tolower(value[0].data[i]);
|
|
|
475 key = ngx_hash(key, value[0].data[i]);
|
|
|
476 }
|
|
|
477
|
|
|
478 key %= NGX_HTTP_MAP_HASH;
|
|
|
479
|
|
|
480 name = ctx->keys_hash[key].elts;
|
|
|
481
|
|
|
482 if (name) {
|
|
|
483 for (i = 0; i < ctx->keys_hash[key].nelts; i++) {
|
|
|
484 if (value[0].len != name[i].len) {
|
|
|
485 continue;
|
|
|
486 }
|
|
|
487
|
|
|
488 if (ngx_strncmp(value[0].data, name[i].data, value[0].len)
|
|
|
489 == 0)
|
|
|
490 {
|
|
|
491 m = ctx->keys.elts;
|
|
|
492 for (i = 0; i < ctx->keys.nelts; i++) {
|
|
|
493 if (ngx_strcmp(value[0].data, m[i].key.data) == 0) {
|
|
|
494 old = m[i].value;
|
|
|
495 m[i].value = var;
|
|
|
496
|
|
|
497 goto duplicate;
|
|
|
498 }
|
|
|
499 }
|
|
|
500 }
|
|
|
501 }
|
|
|
502
|
|
|
503 } else {
|
|
|
504 if (ngx_array_init(&ctx->keys_hash[key], cf->pool, 4,
|
|
|
505 sizeof(ngx_str_t))
|
|
|
506 != NGX_OK)
|
|
|
507 {
|
|
|
508 return NGX_CONF_ERROR;
|
|
|
509 }
|
|
|
510 }
|
|
|
511
|
|
|
512 name = ngx_array_push(&ctx->keys_hash[key]);
|
|
|
513 if (name == NULL) {
|
|
|
514 return NGX_CONF_ERROR;
|
|
|
515 }
|
|
|
516
|
|
|
517 *name = value[0];
|
|
|
518
|
|
|
519 m = ngx_array_push(&ctx->keys);
|
|
|
520 if (m == NULL) {
|
|
|
521 return NGX_CONF_ERROR;
|
|
|
522 }
|
|
|
523
|
|
|
524 m->key = value[0];
|
|
|
525 m->key_hash = ngx_hash_key(value[0].data, value[0].len);
|
|
|
526 m->value = var;
|
|
|
527
|
|
|
528 } else {
|
|
|
529 if (ctx->default_value) {
|
|
|
530 old = ctx->default_value;
|
|
|
531 ctx->default_value = var;
|
|
|
532
|
|
|
533 goto duplicate;
|
|
|
534 }
|
|
|
535
|
|
|
536 ctx->default_value = var;
|
|
|
537 }
|
|
|
538
|
|
|
539 } else {
|
|
|
540
|
|
|
541 if (value[0].len < 3 || value[0].data[1] != '.') {
|
|
|
542 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
543 "invalid DNS wildcard \"%V\"", &value[0]);
|
|
|
544 return NGX_CONF_ERROR;
|
|
|
545 }
|
|
|
546
|
|
|
547 key = 0;
|
|
|
548
|
|
|
549 for (i = 2; i < value[0].len; i++) {
|
|
|
550 value[0].data[i] = ngx_tolower(value[0].data[i]);
|
|
|
551 key = ngx_hash(key, value[0].data[i]);
|
|
|
552 }
|
|
|
553
|
|
|
554 key %= NGX_HTTP_MAP_HASH;
|
|
|
555
|
|
|
556 /* convert "*.example.com" into "com.example.\0" */
|
|
|
557
|
|
|
558 len = 0;
|
|
|
559 n = 0;
|
|
|
560
|
|
|
561 for (i = value[0].len - 1; i; i--) {
|
|
|
562 if (value[0].data[i] == '.') {
|
|
|
563 ngx_memcpy(&buf[n], &value[0].data[i + 1], len);
|
|
|
564 n += len;
|
|
|
565 buf[n++] = '.';
|
|
|
566 len = 0;
|
|
|
567 continue;
|
|
|
568 }
|
|
|
569
|
|
|
570 len++;
|
|
|
571 }
|
|
|
572
|
|
|
573 buf[n] = '\0';
|
|
|
574
|
|
|
575 name = ctx->dns_hash[key].elts;
|
|
|
576
|
|
|
577 if (name) {
|
|
|
578 for (i = 0; i < ctx->dns_hash[key].nelts; i++) {
|
|
|
579 if (value[0].len != name[i].len) {
|
|
|
580 continue;
|
|
|
581 }
|
|
|
582
|
|
|
583 if (ngx_strncmp(value[0].data, name[i].data, value[0].len)
|
|
|
584 == 0)
|
|
|
585 {
|
|
|
586 m = ctx->dns_wildcards.elts;
|
|
|
587 for (i = 0; i < ctx->dns_wildcards.nelts; i++) {
|
|
|
588 if (ngx_strcmp(buf, m[i].key.data) == 0) {
|
|
|
589 old = m[i].value;
|
|
|
590 m[i].value = var;
|
|
|
591
|
|
|
592 goto duplicate;
|
|
|
593 }
|
|
|
594 }
|
|
|
595 }
|
|
|
596 }
|
|
|
597
|
|
|
598 } else {
|
|
|
599 if (ngx_array_init(&ctx->dns_hash[key], cf->pool, 4,
|
|
|
600 sizeof(ngx_str_t))
|
|
|
601 != NGX_OK)
|
|
|
602 {
|
|
|
603 return NGX_CONF_ERROR;
|
|
|
604 }
|
|
|
605 }
|
|
|
606
|
|
|
607 name = ngx_array_push(&ctx->dns_hash[key]);
|
|
|
608 if (name == NULL) {
|
|
|
609 return NGX_CONF_ERROR;
|
|
|
610 }
|
|
|
611
|
|
|
612 *name = value[0];
|
|
|
613
|
|
|
614 ngx_memcpy(value[0].data, buf, value[0].len);
|
|
|
615 value[0].len--;
|
|
|
616
|
|
|
617 m = ngx_array_push(&ctx->dns_wildcards);
|
|
|
618 if (m == NULL) {
|
|
|
619 return NGX_CONF_ERROR;
|
|
|
620 }
|
|
|
621
|
|
|
622 m->key = value[0];
|
|
|
623 m->key_hash = 0;
|
|
|
624 m->value = var;
|
|
|
625 }
|
|
|
626
|
|
|
627 return NGX_CONF_OK;
|
|
|
628
|
|
|
629 duplicate:
|
|
|
630
|
|
|
631 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
|
|
|
632 "duplicate parameter \"%V\", value: \"%V\", "
|
|
|
633 "old value: \"%V\"",
|
|
|
634 &value[0], var, old);
|
|
|
635
|
|
|
636 return NGX_CONF_OK;
|
|
|
637 }
|
