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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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312
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29 ngx_hash_combined_t hash;
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138
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30 ngx_int_t index;
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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_ctx_t;
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34
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35
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36 static int ngx_libc_cdecl ngx_http_map_cmp_dns_wildcards(const void *one,
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37 const void *two);
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38 static void *ngx_http_map_create_conf(ngx_conf_t *cf);
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39 static char *ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
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40 static char *ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf);
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41
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42
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43 static ngx_command_t ngx_http_map_commands[] = {
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44
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45 { ngx_string("map"),
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46 NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE2,
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47 ngx_http_map_block,
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48 NGX_HTTP_MAIN_CONF_OFFSET,
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49 0,
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50 NULL },
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51
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52 { ngx_string("map_hash_max_size"),
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53 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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54 ngx_conf_set_num_slot,
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55 NGX_HTTP_MAIN_CONF_OFFSET,
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56 offsetof(ngx_http_map_conf_t, hash_max_size),
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57 NULL },
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58
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59 { ngx_string("map_hash_bucket_size"),
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60 NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
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61 ngx_conf_set_num_slot,
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62 NGX_HTTP_MAIN_CONF_OFFSET,
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63 offsetof(ngx_http_map_conf_t, hash_bucket_size),
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64 NULL },
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65
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66 ngx_null_command
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67 };
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68
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69
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70 static ngx_http_module_t ngx_http_map_module_ctx = {
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71 NULL, /* preconfiguration */
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72 NULL, /* postconfiguration */
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73
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74 ngx_http_map_create_conf, /* create main configuration */
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75 NULL, /* init main configuration */
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76
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77 NULL, /* create server configuration */
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78 NULL, /* merge server configuration */
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79
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80 NULL, /* create location configuration */
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81 NULL /* merge location configuration */
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82 };
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83
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84
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85 ngx_module_t ngx_http_map_module = {
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86 NGX_MODULE_V1,
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87 &ngx_http_map_module_ctx, /* module context */
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88 ngx_http_map_commands, /* module directives */
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89 NGX_HTTP_MODULE, /* module type */
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90 NULL, /* init master */
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91 NULL, /* init module */
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92 NULL, /* init process */
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93 NULL, /* init thread */
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94 NULL, /* exit thread */
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95 NULL, /* exit process */
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96 NULL, /* exit master */
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97 NGX_MODULE_V1_PADDING
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98 };
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99
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100
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101 static ngx_int_t
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102 ngx_http_map_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
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103 uintptr_t data)
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104 {
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105 ngx_http_map_ctx_t *map = (ngx_http_map_ctx_t *) data;
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106
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107 size_t len;
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108 u_char *name;
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392
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109 ngx_uint_t key;
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138
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110 ngx_http_variable_value_t *vv, *value;
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111
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112 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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113 "http map started");
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114
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115 vv = ngx_http_get_flushed_variable(r, map->index);
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116
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250
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117 if (vv == NULL || vv->not_found) {
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118 *v = *map->default_value;
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119 return NGX_OK;
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120 }
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121
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138
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122 len = vv->len;
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123
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124 if (len && map->hostnames && vv->data[len - 1] == '.') {
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125 len--;
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126 }
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127
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128 if (len == 0) {
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129 *v = *map->default_value;
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130 return NGX_OK;
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131 }
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132
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382
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133 name = ngx_pnalloc(r->pool, len);
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138
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134 if (name == NULL) {
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135 return NGX_ERROR;
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136 }
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137
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392
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138 key = ngx_hash_strlow(name, vv->data, len);
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138
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139
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312
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140 value = ngx_hash_find_combined(&map->hash, key, name, len);
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138
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141
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142 if (value) {
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143 *v = *value;
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144
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145 } else {
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312
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146 *v = *map->default_value;
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138
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147 }
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148
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149 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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328
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150 "http map: \"%v\" \"%v\"", vv, v);
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138
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151
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152 return NGX_OK;
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153 }
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154
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155
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156 static void *
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157 ngx_http_map_create_conf(ngx_conf_t *cf)
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158 {
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159 ngx_http_map_conf_t *mcf;
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160
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161 mcf = ngx_palloc(cf->pool, sizeof(ngx_http_map_conf_t));
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162 if (mcf == NULL) {
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163 return NGX_CONF_ERROR;
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164 }
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165
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166 mcf->hash_max_size = NGX_CONF_UNSET_UINT;
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167 mcf->hash_bucket_size = NGX_CONF_UNSET_UINT;
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168
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169 return mcf;
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170 }
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171
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172
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173 static char *
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174 ngx_http_map_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
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175 {
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176 ngx_http_map_conf_t *mcf = conf;
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177
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178 char *rv;
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179 ngx_str_t *value, name;
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180 ngx_conf_t save;
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181 ngx_pool_t *pool;
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182 ngx_hash_init_t hash;
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183 ngx_http_map_ctx_t *map;
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184 ngx_http_variable_t *var;
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185 ngx_http_map_conf_ctx_t ctx;
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186
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187 if (mcf->hash_max_size == NGX_CONF_UNSET_UINT) {
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188 mcf->hash_max_size = 2048;
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189 }
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190
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191 if (mcf->hash_bucket_size == NGX_CONF_UNSET_UINT) {
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192 mcf->hash_bucket_size = ngx_cacheline_size;
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193
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194 } else {
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195 mcf->hash_bucket_size = ngx_align(mcf->hash_bucket_size,
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196 ngx_cacheline_size);
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197 }
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198
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199 map = ngx_pcalloc(cf->pool, sizeof(ngx_http_map_ctx_t));
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200 if (map == NULL) {
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201 return NGX_CONF_ERROR;
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202 }
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203
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204 value = cf->args->elts;
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205
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206 name = value[1];
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207 name.len--;
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208 name.data++;
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209
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210 map->index = ngx_http_get_variable_index(cf, &name);
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211
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212 if (map->index == NGX_ERROR) {
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213 return NGX_CONF_ERROR;
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214 }
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215
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216 name = value[2];
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217 name.len--;
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218 name.data++;
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219
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340
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220 var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
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138
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221 if (var == NULL) {
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222 return NGX_CONF_ERROR;
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223 }
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224
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186
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225 var->get_handler = ngx_http_map_variable;
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138
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226 var->data = (uintptr_t) map;
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227
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228 pool = ngx_create_pool(16384, cf->log);
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229 if (pool == NULL) {
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230 return NGX_CONF_ERROR;
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231 }
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232
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142
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233 ctx.keys.pool = cf->pool;
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234 ctx.keys.temp_pool = pool;
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138
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235
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142
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236 if (ngx_hash_keys_array_init(&ctx.keys, NGX_HASH_LARGE) != NGX_OK) {
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138
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237 ngx_destroy_pool(pool);
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238 return NGX_CONF_ERROR;
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239 }
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240
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142
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241 ctx.values_hash = ngx_pcalloc(pool, sizeof(ngx_array_t) * ctx.keys.hsize);
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138
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242 if (ctx.values_hash == NULL) {
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243 ngx_destroy_pool(pool);
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244 return NGX_CONF_ERROR;
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245 }
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246
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247 ctx.default_value = NULL;
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248 ctx.hostnames = 0;
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249
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250 save = *cf;
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251 cf->pool = pool;
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252 cf->ctx = &ctx;
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253 cf->handler = ngx_http_map;
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254 cf->handler_conf = conf;
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255
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256 rv = ngx_conf_parse(cf, NULL);
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257
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258 *cf = save;
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259
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260 if (rv != NGX_CONF_OK) {
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261 ngx_destroy_pool(pool);
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262 return rv;
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263 }
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264
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312
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265 map->default_value = ctx.default_value ? ctx.default_value:
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266 &ngx_http_variable_null_value;
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267
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138
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268 hash.key = ngx_hash_key_lc;
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269 hash.max_size = mcf->hash_max_size;
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270 hash.bucket_size = mcf->hash_bucket_size;
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271 hash.name = "map_hash";
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272 hash.pool = cf->pool;
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273
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142
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274 if (ctx.keys.keys.nelts) {
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312
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275 hash.hash = &map->hash.hash;
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138
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276 hash.temp_pool = NULL;
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277
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142
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278 if (ngx_hash_init(&hash, ctx.keys.keys.elts, ctx.keys.keys.nelts)
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140
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279 != NGX_OK)
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280 {
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142
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281 ngx_destroy_pool(pool);
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138
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282 return NGX_CONF_ERROR;
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283 }
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284 }
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285
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312
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286 if (ctx.keys.dns_wc_head.nelts) {
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138
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287
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312
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288 ngx_qsort(ctx.keys.dns_wc_head.elts,
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289 (size_t) ctx.keys.dns_wc_head.nelts,
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138
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290 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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291
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292 hash.hash = NULL;
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293 hash.temp_pool = pool;
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294
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312
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295 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_head.elts,
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296 ctx.keys.dns_wc_head.nelts)
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138
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297 != NGX_OK)
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298 {
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142
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299 ngx_destroy_pool(pool);
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138
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300 return NGX_CONF_ERROR;
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301 }
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302
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312
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303 map->hash.wc_head = (ngx_hash_wildcard_t *) hash.hash;
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304 }
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305
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306 if (ctx.keys.dns_wc_tail.nelts) {
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307
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308 ngx_qsort(ctx.keys.dns_wc_tail.elts,
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309 (size_t) ctx.keys.dns_wc_tail.nelts,
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310 sizeof(ngx_hash_key_t), ngx_http_map_cmp_dns_wildcards);
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311
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312 hash.hash = NULL;
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313 hash.temp_pool = pool;
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314
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315 if (ngx_hash_wildcard_init(&hash, ctx.keys.dns_wc_tail.elts,
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316 ctx.keys.dns_wc_tail.nelts)
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317 != NGX_OK)
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318 {
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319 ngx_destroy_pool(pool);
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320 return NGX_CONF_ERROR;
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321 }
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322
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323 map->hash.wc_tail = (ngx_hash_wildcard_t *) hash.hash;
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138
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324 }
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325
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326 ngx_destroy_pool(pool);
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327
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328 return rv;
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329 }
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330
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331
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332 static int ngx_libc_cdecl
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333 ngx_http_map_cmp_dns_wildcards(const void *one, const void *two)
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334 {
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335 ngx_hash_key_t *first, *second;
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336
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337 first = (ngx_hash_key_t *) one;
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338 second = (ngx_hash_key_t *) two;
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339
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340 return ngx_strcmp(first->key.data, second->key.data);
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341 }
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342
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343
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344 static char *
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345 ngx_http_map(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
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346 {
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140
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347 ngx_int_t rc;
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348 ngx_str_t *value, file;
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312
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349 ngx_uint_t i, key;
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138
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350 ngx_http_map_conf_ctx_t *ctx;
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140
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351 ngx_http_variable_value_t *var, **vp;
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138
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352
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353 ctx = cf->ctx;
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354
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355 value = cf->args->elts;
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356
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357 if (cf->args->nelts == 1
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358 && ngx_strcmp(value[0].data, "hostnames") == 0)
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359 {
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360 ctx->hostnames = 1;
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361 return NGX_CONF_OK;
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362
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363 } else if (cf->args->nelts != 2) {
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364 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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365 "invalid number of the map parameters");
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366 return NGX_CONF_ERROR;
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367
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368 } else if (value[0].len == 0) {
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369 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
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370 "invalid first parameter");
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371 return NGX_CONF_ERROR;
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372 }
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373
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374 if (ngx_strcmp(value[0].data, "include") == 0) {
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375 file = value[1];
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376
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454
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377 if (ngx_conf_full_name(cf->cycle, &file, 1) != NGX_OK){
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138
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378 return NGX_CONF_ERROR;
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379 }
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380
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381 ngx_log_debug1(NGX_LOG_DEBUG_CORE, cf->log, 0, "include %s", file.data);
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382
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383 return ngx_conf_parse(cf, &file);
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384 }
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385
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386 key = 0;
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387
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388 for (i = 0; i < value[1].len; i++) {
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389 key = ngx_hash(key, value[1].data[i]);
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390 }
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391
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142
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392 key %= ctx->keys.hsize;
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138
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393
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394 vp = ctx->values_hash[key].elts;
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395
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396 if (vp) {
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397 for (i = 0; i < ctx->values_hash[key].nelts; i++) {
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398 if (value[1].len != (size_t) vp[i]->len) {
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399 continue;
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400 }
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401
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402 if (ngx_strncmp(value[1].data, vp[i]->data, value[1].len) == 0) {
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403 var = vp[i];
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404 goto found;
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405 }
|
|
|
406 }
|
|
|
407
|
|
|
408 } else {
|
|
|
409 if (ngx_array_init(&ctx->values_hash[key], cf->pool, 4,
|
|
|
410 sizeof(ngx_http_variable_value_t *))
|
|
|
411 != NGX_OK)
|
|
|
412 {
|
|
|
413 return NGX_CONF_ERROR;
|
|
|
414 }
|
|
|
415 }
|
|
|
416
|
|
142
|
417 var = ngx_palloc(ctx->keys.pool, sizeof(ngx_http_variable_value_t));
|
|
138
|
418 if (var == NULL) {
|
|
|
419 return NGX_CONF_ERROR;
|
|
|
420 }
|
|
|
421
|
|
|
422 var->len = value[1].len;
|
|
142
|
423 var->data = ngx_pstrdup(ctx->keys.pool, &value[1]);
|
|
138
|
424 if (var->data == NULL) {
|
|
|
425 return NGX_CONF_ERROR;
|
|
|
426 }
|
|
|
427
|
|
|
428 var->valid = 1;
|
|
340
|
429 var->no_cacheable = 0;
|
|
138
|
430 var->not_found = 0;
|
|
|
431
|
|
|
432 vp = ngx_array_push(&ctx->values_hash[key]);
|
|
|
433 if (vp == NULL) {
|
|
|
434 return NGX_CONF_ERROR;
|
|
|
435 }
|
|
|
436
|
|
|
437 *vp = var;
|
|
|
438
|
|
|
439 found:
|
|
|
440
|
|
312
|
441 if (ngx_strcmp(value[0].data, "default") == 0) {
|
|
138
|
442
|
|
312
|
443 if (ctx->default_value) {
|
|
138
|
444 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
312
|
445 "duplicate default map parameter");
|
|
138
|
446 return NGX_CONF_ERROR;
|
|
|
447 }
|
|
|
448
|
|
312
|
449 ctx->default_value = var;
|
|
|
450
|
|
|
451 return NGX_CONF_OK;
|
|
138
|
452 }
|
|
|
453
|
|
312
|
454 if (value[0].len && value[0].data[0] == '!') {
|
|
|
455 value[0].len--;
|
|
|
456 value[0].data++;
|
|
|
457 }
|
|
|
458
|
|
|
459 rc = ngx_hash_add_key(&ctx->keys, &value[0], var,
|
|
|
460 (ctx->hostnames) ? NGX_HASH_WILDCARD_KEY : 0);
|
|
138
|
461
|
|
140
|
462 if (rc == NGX_OK) {
|
|
|
463 return NGX_CONF_OK;
|
|
|
464 }
|
|
138
|
465
|
|
312
|
466 if (rc == NGX_DECLINED) {
|
|
|
467 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
468 "invalid hostname or wildcard \"%V\"", &value[0]);
|
|
|
469 }
|
|
|
470
|
|
140
|
471 if (rc == NGX_BUSY) {
|
|
|
472 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
473 "conflicting parameter \"%V\"", &value[0]);
|
|
|
474 }
|
|
138
|
475
|
|
140
|
476 return NGX_CONF_ERROR;
|
|
138
|
477 }
|
