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138
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 typedef struct {
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13 ngx_uint_t hash_max_size;
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14 ngx_uint_t hash_bucket_size;
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15 } ngx_http_map_conf_t;
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16
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17
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18 typedef struct {
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142
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19 ngx_hash_keys_arrays_t keys;
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138
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20
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21 ngx_array_t *values_hash;
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22
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23 ngx_http_variable_value_t *default_value;
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24 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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25 } ngx_http_map_conf_ctx_t;
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26
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27
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28 typedef struct {
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29 ngx_hash_t hash;
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30 ngx_hash_wildcard_t *dns_wildcards;
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31 ngx_int_t index;
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32 ngx_http_variable_value_t *default_value;
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33 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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34 } ngx_http_map_ctx_t;
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35
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36
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37 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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38 const void *two);
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39 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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40 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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41 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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42
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43
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44 static ngx_command_t ngx_http_map_commands[] = {
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45
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46 { ngx_string("map"),
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47 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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48 ngx_http_map_block,
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49 NGX_HTTP_MAIN_CONF_OFFSET,
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50 0,
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51 NULL },
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52
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53 { ngx_string("map_hash_max_size"),
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54 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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55 ngx_conf_set_num_slot,
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56 NGX_HTTP_MAIN_CONF_OFFSET,
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57 offsetof(ngx_http_map_conf_t, hash_max_size),
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58 NULL },
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59
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60 { ngx_string("map_hash_bucket_size"),
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61 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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62 ngx_conf_set_num_slot,
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63 NGX_HTTP_MAIN_CONF_OFFSET,
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64 offsetof(ngx_http_map_conf_t, hash_bucket_size),
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65 NULL },
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66
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67 ngx_null_command
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68 };
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69
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70
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71 static ngx_http_module_t ngx_http_map_module_ctx = {
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72 NULL, /* preconfiguration */
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73 NULL, /* postconfiguration */
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74
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75 ngx_http_map_create_conf, /* create main configuration */
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76 NULL, /* init main configuration */
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77
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78 NULL, /* create server configuration */
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79 NULL, /* merge server configuration */
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80
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81 NULL, /* create location configuration */
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82 NULL /* merge location configuration */
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83 };
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84
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85
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86 ngx_module_t ngx_http_map_module = {
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87 NGX_MODULE_V1,
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88 &ngx_http_map_module_ctx, /* module context */
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89 ngx_http_map_commands, /* module directives */
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90 NGX_HTTP_MODULE, /* module type */
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91 NULL, /* init master */
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92 NULL, /* init module */
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93 NULL, /* init process */
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94 NULL, /* init thread */
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95 NULL, /* exit thread */
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96 NULL, /* exit process */
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97 NULL, /* exit master */
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98 NGX_MODULE_V1_PADDING
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99 };
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100
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101
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102 static ngx_int_t
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103 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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104 uintptr_t data)
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105 {
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106 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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107
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108 size_t len;
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109 u_char *name;
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110 ngx_uint_t key, i;
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111 ngx_http_variable_value_t *vv, *value;
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112
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113 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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114 "http map started");
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115
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116 vv = ngx_http_get_flushed_variable(r, map->index);
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117
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118 len = vv->len;
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119
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120 if (len && map->hostnames && vv->data[len - 1] == '.') {
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121 len--;
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122 }
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123
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124 if (len == 0) {
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125 *v = *map->default_value;
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126 return NGX_OK;
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127 }
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128
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129 name = ngx_palloc(r->pool, len);
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130 if (name == NULL) {
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131 return NGX_ERROR;
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132 }
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133
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134 key = 0;
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135 for (i = 0; i < len; i++) {
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136 name[i] = ngx_tolower(vv->data[i]);
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137 key = ngx_hash(key, name[i]);
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138 }
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139
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140 value = NULL;
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141
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142 if (map->hash.buckets) {
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143 value = ngx_hash_find(&map->hash, key, name, len);
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144 }
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145
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146 if (value) {
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147 *v = *value;
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148
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149 } else {
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150 if (map->dns_wildcards && map->dns_wildcards->hash.buckets) {
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151 value = ngx_hash_find_wildcard(map->dns_wildcards, name, len);
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152 if (value) {
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153 *v = *value;
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154
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155 } else {
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156 *v = *map->default_value;
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157 }
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158
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159 } else {
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160 *v = *map->default_value;
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161 }
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162 }
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163
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164 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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165 "http map: \"%V\" \"%V\"", vv, v);
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166
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167 return NGX_OK;
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168 }
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169
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170
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171 static void *
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172 ngx_http_map_create_conf(ngx_conf_t *cf)
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173 {
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174 ngx_http_map_conf_t *mcf;
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175
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176 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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177 if (mcf == NULL) {
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178 return NGX_CONF_ERROR;
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179 }
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180
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181 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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182 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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183
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184 return mcf;
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185 }
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186
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187
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188 static char *
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189 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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190 {
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191 ngx_http_map_conf_t *mcf = conf;
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192
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193 char *rv;
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194 ngx_str_t *value, name;
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195 ngx_conf_t save;
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196 ngx_pool_t *pool;
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197 ngx_hash_init_t hash;
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198 ngx_http_map_ctx_t *map;
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199 ngx_http_variable_t *var;
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200 ngx_http_map_conf_ctx_t ctx;
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201
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202 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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203 mcf->hash_max_size = 2048;
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204 }
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205
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206 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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207 mcf->hash_bucket_size = ngx_cacheline_size;
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208
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209 } else {
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210 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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211 ngx_cacheline_size);
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212 }
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213
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214 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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215 if (map == NULL) {
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216 return NGX_CONF_ERROR;
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217 }
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218
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219 value = cf->args->elts;
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220
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221 name = value[1];
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222 name.len--;
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223 name.data++;
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224
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225 map->index = ngx_http_get_variable_index(cf, &name);
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226
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227 if (map->index == NGX_ERROR) {
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228 return NGX_CONF_ERROR;
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229 }
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230
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231 name = value[2];
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232 name.len--;
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233 name.data++;
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234
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235 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
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236 if (var == NULL) {
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237 return NGX_CONF_ERROR;
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238 }
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239
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240 var->handler = ngx_http_map_variable;
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241 var->data = (uintptr_t) map;
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242
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243 pool = ngx_create_pool(16384, cf->log);
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244 if (pool == NULL) {
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245 return NGX_CONF_ERROR;
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246 }
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247
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142
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248 ctx.keys.pool = cf->pool;
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249 ctx.keys.temp_pool = pool;
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138
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250
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142
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251 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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252 ngx_destroy_pool(pool);
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253 return NGX_CONF_ERROR;
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254 }
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255
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142
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256 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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257 if (ctx.values_hash == NULL) {
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258 ngx_destroy_pool(pool);
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259 return NGX_CONF_ERROR;
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260 }
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261
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262 ctx.default_value = NULL;
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263 ctx.hostnames = 0;
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264
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265 save = *cf;
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266 cf->pool = pool;
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267 cf->ctx = &ctx;
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268 cf->handler = ngx_http_map;
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269 cf->handler_conf = conf;
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270
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271 rv = ngx_conf_parse(cf, NULL);
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272
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273 *cf = save;
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274
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275 if (rv != NGX_CONF_OK) {
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276 ngx_destroy_pool(pool);
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277 return rv;
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278 }
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279
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280 hash.key = ngx_hash_key_lc;
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281 hash.max_size = mcf->hash_max_size;
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282 hash.bucket_size = mcf->hash_bucket_size;
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283 hash.name = "map_hash";
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284 hash.pool = cf->pool;
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285
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142
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286 if (ctx.keys.keys.nelts) {
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138
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287 hash.hash = &map->hash;
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288 hash.temp_pool = NULL;
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289
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142
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290 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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140
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291 != NGX_OK)
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292 {
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142
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293 ngx_destroy_pool(pool);
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138
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294 return NGX_CONF_ERROR;
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295 }
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296 }
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297
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298 map->default_value = ctx.default_value ? ctx.default_value:
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299 &ngx_http_variable_null_value;
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300
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142
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301 if (ctx.keys.dns_wildcards.nelts) {
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138
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302
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142
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303 ngx_qsort(ctx.keys.dns_wildcards.elts,
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304 (size_t) ctx.keys.dns_wildcards.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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142
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310 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wildcards.elts,
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311 ctx.keys.dns_wildcards.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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318 map->dns_wildcards = (ngx_hash_wildcard_t *) hash.hash;
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319 }
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320
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321 ngx_destroy_pool(pool);
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322
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323 return rv;
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324 }
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325
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326
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327 static int ngx_libc_cdecl
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328 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
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329 {
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330 ngx_hash_key_t *first, *second;
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331
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332 first = (ngx_hash_key_t *) one;
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333 second = (ngx_hash_key_t *) two;
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334
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335 return ngx_strcmp(first->key.data, second->key.data);
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336 }
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337
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338
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339 static char *
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340 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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341 {
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140
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342 u_char ch;
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343 ngx_int_t rc;
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344 ngx_str_t *value, file;
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345 ngx_uint_t i, key, flags;
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138
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346 ngx_http_map_conf_ctx_t *ctx;
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140
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347 ngx_http_variable_value_t *var, **vp;
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138
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348
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349 ctx = cf->ctx;
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350
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351 value = cf->args->elts;
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352
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353 if (cf->args->nelts == 1
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354 && ngx_strcmp(value[0].data, "hostnames") == 0)
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355 {
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356 ctx->hostnames = 1;
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357 return NGX_CONF_OK;
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358
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359 } else if (cf->args->nelts != 2) {
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360 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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361 "invalid number of the map parameters");
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362 return NGX_CONF_ERROR;
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363
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364 } else if (value[0].len == 0) {
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365 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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366 "invalid first parameter");
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367 return NGX_CONF_ERROR;
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368 }
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369
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370 if (ngx_strcmp(value[0].data, "include") == 0) {
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371 file = value[1];
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372
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373 if (ngx_conf_full_name(cf->cycle, &file) == NGX_ERROR){
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374 return NGX_CONF_ERROR;
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375 }
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376
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377 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
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378
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379 return ngx_conf_parse(cf, &file);
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380 }
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381
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382 key = 0;
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383
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384 for (i = 0; i < value[1].len; i++) {
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385 key = ngx_hash(key, value[1].data[i]);
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386 }
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387
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142
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388 key %= ctx->keys.hsize;
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138
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389
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390 vp = ctx->values_hash[key].elts;
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391
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392 if (vp) {
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393 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
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394 if (value[1].len != (size_t) vp[i]->len) {
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395 continue;
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396 }
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397
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398 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
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399 var = vp[i];
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400 goto found;
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401 }
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402 }
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403
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404 } else {
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405 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
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406 sizeof(ngx_http_variable_value_t *))
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407 != NGX_OK)
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408 {
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409 return NGX_CONF_ERROR;
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410 }
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411 }
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412
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142
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413 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
138
|
414 if (var == NULL) {
|
|
|
415 return NGX_CONF_ERROR;
|
|
|
416 }
|
|
|
417
|
|
|
418 var->len = value[1].len;
|
|
142
|
419 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
138
|
420 if (var->data == NULL) {
|
|
|
421 return NGX_CONF_ERROR;
|
|
|
422 }
|
|
|
423
|
|
|
424 var->valid = 1;
|
|
|
425 var->no_cachable = 0;
|
|
|
426 var->not_found = 0;
|
|
|
427
|
|
|
428 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
429 if (vp == NULL) {
|
|
|
430 return NGX_CONF_ERROR;
|
|
|
431 }
|
|
|
432
|
|
|
433 *vp = var;
|
|
|
434
|
|
|
435 found:
|
|
|
436
|
|
140
|
437 ch = value[0].data[0];
|
|
138
|
438
|
|
140
|
439 if ((ch != '*' && ch != '.') || ctx->hostnames == 0) {
|
|
138
|
440
|
|
140
|
441 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
138
|
442
|
|
140
|
443 if (ctx->default_value) {
|
|
|
444 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
445 "duplicate default map parameter");
|
|
138
|
446 return NGX_CONF_ERROR;
|
|
|
447 }
|
|
|
448
|
|
140
|
449 ctx->default_value = var;
|
|
138
|
450
|
|
140
|
451 return NGX_CONF_OK;
|
|
|
452 }
|
|
138
|
453
|
|
140
|
454 if (value[0].len && ch == '!') {
|
|
|
455 value[0].len--;
|
|
|
456 value[0].data++;
|
|
|
457 }
|
|
138
|
458
|
|
140
|
459 flags = 0;
|
|
138
|
460
|
|
|
461 } else {
|
|
|
462
|
|
140
|
463 if ((ch == '*' && (value[0].len < 3 || value[0].data[1] != '.'))
|
|
|
464 || (ch == '.' && value[0].len < 2))
|
|
|
465 {
|
|
138
|
466 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
467 "invalid DNS wildcard \"%V\"", &value[0]);
|
|
140
|
468
|
|
138
|
469 return NGX_CONF_ERROR;
|
|
|
470 }
|
|
|
471
|
|
142
|
472 flags = NGX_HASH_WILDCARD_KEY;
|
|
138
|
473 }
|
|
|
474
|
|
142
|
475 rc = ngx_hash_add_key(&ctx->keys, &value[0], var, flags);
|
|
138
|
476
|
|
140
|
477 if (rc == NGX_OK) {
|
|
|
478 return NGX_CONF_OK;
|
|
|
479 }
|
|
138
|
480
|
|
140
|
481 if (rc == NGX_BUSY) {
|
|
|
482 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
483 "conflicting parameter \"%V\"", &value[0]);
|
|
|
484 }
|
|
138
|
485
|
|
140
|
486 return NGX_CONF_ERROR;
|
|
138
|
487 }
|
