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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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604
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22 ngx_array_t var_values;
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138
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23
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24 ngx_http_variable_value_t *default_value;
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604
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25 ngx_conf_t *cf;
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26 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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27 } ngx_http_map_conf_ctx_t;
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28
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29
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30 typedef struct {
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312
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31 ngx_hash_combined_t hash;
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32 ngx_http_complex_value_t value;
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33 ngx_http_variable_value_t *default_value;
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34 ngx_uint_t hostnames; /* unsigned hostnames:1 */
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35 } ngx_http_map_ctx_t;
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36
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37
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38 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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39 const void *two);
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40 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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41 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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42 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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43
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44
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45 static ngx_command_t ngx_http_map_commands[] = {
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46
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47 { ngx_string("map"),
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48 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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49 ngx_http_map_block,
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50 NGX_HTTP_MAIN_CONF_OFFSET,
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51 0,
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52 NULL },
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53
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54 { ngx_string("map_hash_max_size"),
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55 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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56 ngx_conf_set_num_slot,
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57 NGX_HTTP_MAIN_CONF_OFFSET,
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58 offsetof(ngx_http_map_conf_t, hash_max_size),
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59 NULL },
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60
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61 { ngx_string("map_hash_bucket_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_bucket_size),
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66 NULL },
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67
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68 ngx_null_command
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69 };
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70
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71
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72 static ngx_http_module_t ngx_http_map_module_ctx = {
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73 NULL, /* preconfiguration */
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74 NULL, /* postconfiguration */
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75
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76 ngx_http_map_create_conf, /* create main configuration */
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77 NULL, /* init main configuration */
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78
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79 NULL, /* create server configuration */
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80 NULL, /* merge server configuration */
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81
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82 NULL, /* create location configuration */
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83 NULL /* merge location configuration */
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84 };
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85
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86
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87 ngx_module_t ngx_http_map_module = {
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88 NGX_MODULE_V1,
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89 &ngx_http_map_module_ctx, /* module context */
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90 ngx_http_map_commands, /* module directives */
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91 NGX_HTTP_MODULE, /* module type */
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92 NULL, /* init master */
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93 NULL, /* init module */
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94 NULL, /* init process */
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95 NULL, /* init thread */
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96 NULL, /* exit thread */
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97 NULL, /* exit process */
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98 NULL, /* exit master */
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99 NGX_MODULE_V1_PADDING
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100 };
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101
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102
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103 static ngx_int_t
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104 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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105 uintptr_t data)
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106 {
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107 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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108
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109 size_t len;
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604
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110 ngx_str_t val;
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392
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111 ngx_uint_t key;
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604
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112 ngx_http_variable_value_t *value;
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138
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113
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114 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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115 "http map started");
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116
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604
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117 if (ngx_http_complex_value(r, &map->value, &val) != NGX_OK) {
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118 return NGX_ERROR;
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250
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119 }
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120
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604
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121 len = val.len;
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138
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122
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604
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123 if (len && map->hostnames && val.data[len - 1] == '.') {
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124 len--;
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125 }
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126
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604
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127 key = ngx_hash_strlow(val.data, val.data, len);
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138
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128
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604
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129 value = ngx_hash_find_combined(&map->hash, key, val.data, len);
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130
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131 if (value == NULL) {
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132 value = map->default_value;
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138
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133 }
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134
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604
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135 if (!value->valid) {
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136 value = ngx_http_get_flushed_variable(r, (ngx_uint_t) value->data);
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138
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137
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604
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138 if (value == NULL || value->not_found) {
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139 value = &ngx_http_variable_null_value;
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140 }
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138
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141 }
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142
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604
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143 *v = *value;
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144
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138
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145 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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604
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146 "http map: \"%v\" \"%v\"", &val, v);
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138
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147
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148 return NGX_OK;
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149 }
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150
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151
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152 static void *
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153 ngx_http_map_create_conf(ngx_conf_t *cf)
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154 {
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155 ngx_http_map_conf_t *mcf;
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156
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157 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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158 if (mcf == NULL) {
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496
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159 return NULL;
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138
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160 }
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161
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162 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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163 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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164
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165 return mcf;
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166 }
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167
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168
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169 static char *
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170 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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171 {
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172 ngx_http_map_conf_t *mcf = conf;
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173
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604
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174 char *rv;
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175 ngx_str_t *value, name;
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176 ngx_conf_t save;
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177 ngx_pool_t *pool;
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178 ngx_hash_init_t hash;
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179 ngx_http_map_ctx_t *map;
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180 ngx_http_variable_t *var;
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181 ngx_http_map_conf_ctx_t ctx;
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182 ngx_http_compile_complex_value_t ccv;
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138
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183
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184 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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185 mcf->hash_max_size = 2048;
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186 }
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187
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188 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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189 mcf->hash_bucket_size = ngx_cacheline_size;
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190
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191 } else {
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192 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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193 ngx_cacheline_size);
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194 }
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195
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196 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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197 if (map == NULL) {
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198 return NGX_CONF_ERROR;
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199 }
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200
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201 value = cf->args->elts;
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202
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203 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
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204
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604
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205 ccv.cf = cf;
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206 ccv.value = &value[1];
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207 ccv.complex_value = &map->value;
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208
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209 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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210 return NGX_CONF_ERROR;
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211 }
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212
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213 name = value[2];
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214 name.len--;
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215 name.data++;
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216
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340
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217 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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218 if (var == NULL) {
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219 return NGX_CONF_ERROR;
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220 }
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221
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186
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222 var->get_handler = ngx_http_map_variable;
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223 var->data = (uintptr_t) map;
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224
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225 pool = ngx_create_pool(16384, cf->log);
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226 if (pool == NULL) {
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227 return NGX_CONF_ERROR;
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228 }
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229
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142
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230 ctx.keys.pool = cf->pool;
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231 ctx.keys.temp_pool = pool;
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232
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142
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233 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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234 ngx_destroy_pool(pool);
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235 return NGX_CONF_ERROR;
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236 }
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237
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142
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238 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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239 if (ctx.values_hash == NULL) {
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240 ngx_destroy_pool(pool);
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241 return NGX_CONF_ERROR;
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242 }
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243
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604
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244 if (ngx_array_init(&ctx.var_values, cf->pool, 2,
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245 sizeof(ngx_http_variable_value_t))
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246 != NGX_OK)
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247 {
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248 ngx_destroy_pool(pool);
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249 return NGX_CONF_ERROR;
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250 }
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251
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138
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252 ctx.default_value = NULL;
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253 ctx.cf = &save;
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138
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254 ctx.hostnames = 0;
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255
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256 save = *cf;
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257 cf->pool = pool;
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258 cf->ctx = &ctx;
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259 cf->handler = ngx_http_map;
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260 cf->handler_conf = conf;
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261
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262 rv = ngx_conf_parse(cf, NULL);
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263
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264 *cf = save;
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265
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266 if (rv != NGX_CONF_OK) {
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267 ngx_destroy_pool(pool);
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268 return rv;
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269 }
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270
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312
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271 map->default_value = ctx.default_value ? ctx.default_value:
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272 &ngx_http_variable_null_value;
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273
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138
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274 hash.key = ngx_hash_key_lc;
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275 hash.max_size = mcf->hash_max_size;
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276 hash.bucket_size = mcf->hash_bucket_size;
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277 hash.name = "map_hash";
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278 hash.pool = cf->pool;
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279
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142
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280 if (ctx.keys.keys.nelts) {
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312
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281 hash.hash = &map->hash.hash;
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138
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282 hash.temp_pool = NULL;
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283
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142
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284 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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140
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285 != NGX_OK)
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286 {
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142
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287 ngx_destroy_pool(pool);
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138
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288 return NGX_CONF_ERROR;
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289 }
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290 }
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291
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312
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292 if (ctx.keys.dns_wc_head.nelts) {
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138
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293
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312
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294 ngx_qsort(ctx.keys.dns_wc_head.elts,
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295 (size_t) ctx.keys.dns_wc_head.nelts,
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138
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296 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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297
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298 hash.hash = NULL;
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299 hash.temp_pool = pool;
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300
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312
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301 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts,
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302 ctx.keys.dns_wc_head.nelts)
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138
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303 != NGX_OK)
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304 {
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142
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305 ngx_destroy_pool(pool);
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138
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306 return NGX_CONF_ERROR;
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307 }
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308
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312
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309 map->hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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310 }
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311
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312 if (ctx.keys.dns_wc_tail.nelts) {
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313
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314 ngx_qsort(ctx.keys.dns_wc_tail.elts,
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315 (size_t) ctx.keys.dns_wc_tail.nelts,
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316 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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317
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318 hash.hash = NULL;
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319 hash.temp_pool = pool;
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320
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321 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts,
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322 ctx.keys.dns_wc_tail.nelts)
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323 != NGX_OK)
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324 {
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325 ngx_destroy_pool(pool);
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326 return NGX_CONF_ERROR;
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327 }
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328
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329 map->hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
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138
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330 }
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331
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332 ngx_destroy_pool(pool);
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333
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334 return rv;
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335 }
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336
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337
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338 static int ngx_libc_cdecl
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339 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
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340 {
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341 ngx_hash_key_t *first, *second;
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342
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343 first = (ngx_hash_key_t *) one;
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344 second = (ngx_hash_key_t *) two;
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345
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526
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346 return ngx_dns_strcmp(first->key.data, second->key.data);
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138
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347 }
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348
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349
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350 static char *
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351 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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352 {
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604
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353 ngx_int_t rc, index;
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354 ngx_str_t *value, file, name;
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312
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355 ngx_uint_t i, key;
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138
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356 ngx_http_map_conf_ctx_t *ctx;
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140
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357 ngx_http_variable_value_t *var, **vp;
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138
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358
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359 ctx = cf->ctx;
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360
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361 value = cf->args->elts;
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362
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363 if (cf->args->nelts == 1
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364 && ngx_strcmp(value[0].data, "hostnames") == 0)
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365 {
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366 ctx->hostnames = 1;
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367 return NGX_CONF_OK;
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368
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369 } else if (cf->args->nelts != 2) {
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370 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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371 "invalid number of the map parameters");
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372 return NGX_CONF_ERROR;
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373 }
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374
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375 if (ngx_strcmp(value[0].data, "include") == 0) {
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376 file = value[1];
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377
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582
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378 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK) {
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138
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379 return NGX_CONF_ERROR;
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380 }
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381
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382 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
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383
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384 return ngx_conf_parse(cf, &file);
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385 }
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386
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604
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387 if (value[1].data[0] == '$') {
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388 name = value[1];
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389 name.len--;
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390 name.data++;
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391
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392 index = ngx_http_get_variable_index(ctx->cf, &name);
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393 if (index == NGX_ERROR) {
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394 return NGX_CONF_ERROR;
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395 }
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396
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397 var = ctx->var_values.elts;
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398
|
|
|
399 for (i = 0; i < ctx->var_values.nelts; i++) {
|
|
|
400 if (index == (ngx_int_t) var[i].data) {
|
|
|
401 goto found;
|
|
|
402 }
|
|
|
403 }
|
|
|
404
|
|
|
405 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
|
406 if (var == NULL) {
|
|
|
407 return NGX_CONF_ERROR;
|
|
|
408 }
|
|
|
409
|
|
|
410 var->valid = 0;
|
|
|
411 var->no_cacheable = 0;
|
|
|
412 var->not_found = 0;
|
|
|
413 var->len = 0;
|
|
|
414 var->data = (u_char *) index;
|
|
|
415
|
|
|
416 vp = ngx_array_push(&ctx->var_values);
|
|
|
417 if (vp == NULL) {
|
|
|
418 return NGX_CONF_ERROR;
|
|
|
419 }
|
|
|
420
|
|
|
421 *vp = var;
|
|
|
422
|
|
|
423 goto found;
|
|
|
424 }
|
|
|
425
|
|
138
|
426 key = 0;
|
|
|
427
|
|
|
428 for (i = 0; i < value[1].len; i++) {
|
|
|
429 key = ngx_hash(key, value[1].data[i]);
|
|
|
430 }
|
|
|
431
|
|
142
|
432 key %= ctx->keys.hsize;
|
|
138
|
433
|
|
|
434 vp = ctx->values_hash[key].elts;
|
|
|
435
|
|
|
436 if (vp) {
|
|
|
437 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
|
|
|
438 if (value[1].len != (size_t) vp[i]->len) {
|
|
|
439 continue;
|
|
|
440 }
|
|
|
441
|
|
|
442 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
|
|
|
443 var = vp[i];
|
|
|
444 goto found;
|
|
|
445 }
|
|
|
446 }
|
|
|
447
|
|
|
448 } else {
|
|
|
449 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
|
450 sizeof(ngx_http_variable_value_t *))
|
|
|
451 != NGX_OK)
|
|
|
452 {
|
|
|
453 return NGX_CONF_ERROR;
|
|
|
454 }
|
|
|
455 }
|
|
|
456
|
|
142
|
457 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
138
|
458 if (var == NULL) {
|
|
|
459 return NGX_CONF_ERROR;
|
|
|
460 }
|
|
|
461
|
|
|
462 var->len = value[1].len;
|
|
142
|
463 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
138
|
464 if (var->data == NULL) {
|
|
|
465 return NGX_CONF_ERROR;
|
|
|
466 }
|
|
|
467
|
|
|
468 var->valid = 1;
|
|
340
|
469 var->no_cacheable = 0;
|
|
138
|
470 var->not_found = 0;
|
|
|
471
|
|
|
472 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
473 if (vp == NULL) {
|
|
|
474 return NGX_CONF_ERROR;
|
|
|
475 }
|
|
|
476
|
|
|
477 *vp = var;
|
|
|
478
|
|
|
479 found:
|
|
|
480
|
|
312
|
481 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
138
|
482
|
|
312
|
483 if (ctx->default_value) {
|
|
138
|
484 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
312
|
485 "duplicate default map parameter");
|
|
138
|
486 return NGX_CONF_ERROR;
|
|
|
487 }
|
|
|
488
|
|
312
|
489 ctx->default_value = var;
|
|
|
490
|
|
|
491 return NGX_CONF_OK;
|
|
138
|
492 }
|
|
|
493
|
|
604
|
494 if (value[0].len && value[0].data[0] == '\\') {
|
|
312
|
495 value[0].len--;
|
|
|
496 value[0].data++;
|
|
|
497 }
|
|
|
498
|
|
|
499 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
|
500 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
|
138
|
501
|
|
140
|
502 if (rc == NGX_OK) {
|
|
|
503 return NGX_CONF_OK;
|
|
|
504 }
|
|
138
|
505
|
|
312
|
506 if (rc == NGX_DECLINED) {
|
|
|
507 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
508 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
|
509 }
|
|
|
510
|
|
140
|
511 if (rc == NGX_BUSY) {
|
|
|
512 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
513 "conflicting parameter \"%V\"", &value[0]);
|
|
|
514 }
|
|
138
|
515
|
|
140
|
516 return NGX_CONF_ERROR;
|
|
138
|
517 }
|
