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annotate xml/en/docs/http/ngx_http_geo_module.xml @ 580:be54c443235a

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Added copyright markers to documentation sources.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 10 Jul 2012 12:59:42 +0000
parents a8daad8e83bb
children 764fbac1b8b4
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Igor Sysoev
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5 Copyright (C) Nginx, Inc.
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6 -->
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7
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8 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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9
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10 <module name="Module ngx_http_geo_module"
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11 link="/en/docs/http/ngx_http_geo_module.html"
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12 lang="en">
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13
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14 <section id="summary">
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15
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16 <para>
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17 The <literal>ngx_http_geo_module</literal> module creates variables
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18 whose values depend on the client IP address.
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19 </para>
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20
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21 </section>
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22
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23
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24 <section id="example" name="Example Configuration">
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25
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26 <para>
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27 <example>
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28 geo $geo {
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29 default 0;
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30 127.0.0.1/32 2;
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31 192.168.1.0/24 1;
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32 10.1.0.0/16 1;
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33 }
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34 </example>
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35 </para>
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36
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37 </section>
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38
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39
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40 <section id="directives" name="Directives">
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41
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42 <directive name="geo">
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43 <syntax block="yes">[<value>$address</value>] <value>$variable</value></syntax>
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44 <default/>
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45 <context>http</context>
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46
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47 <para>
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48 Describes the dependency of values of the specified variable
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49 on the client IP address.
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50 By default an address is taken from the <var>$remote_addr</var> variable
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51 but it can also be taken from another variable (0.7.27), for example:
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52 <example>
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53 geo $arg_remote_addr $geo {
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54 ...;
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55 }
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56 </example>
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57 If the value of a variable does not represent a valid IP address
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58 then the “<literal>255.255.255.255</literal>” address is used.
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59 </para>
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60
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61 <para>
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62 Addresses are specified as CIDR or ranges (0.7.23).
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63 The following special parameters are also supported:
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64 <list type="tag">
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65
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66 <tag-name><literal>delete</literal></tag-name>
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67 <tag-desc>
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68 deletes the specified network (0.7.23).
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69 </tag-desc>
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70
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71 <tag-name><literal>default</literal></tag-name>
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72 <tag-desc>
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73 a value of variable if the client address does not
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74 match any of the specified addresses.
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75 When CIDR is used, “<literal>0.0.0.0/0</literal>” can be written
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76 instead of <literal>default</literal>.
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77 </tag-desc>
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78
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79 <tag-name><literal>include</literal></tag-name>
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80 <tag-desc>
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81 includes a file with addresses and values.
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82 There can be several inclusions.
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83 </tag-desc>
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84
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85 <tag-name><literal>proxy</literal></tag-name>
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86 <tag-desc>
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87 defines trusted addresses (0.8.7, 0.7.63).
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88 When a request comes from a trusted address,
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89 an address from the <header>X-Forwarded-For</header> request
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90 header field will be used instead.
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91 In contrast to the regular addresses, trusted addresses are
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92 checked sequentially.
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93 <note>
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94 IPv6 addresses are supported starting from versions 1.3.0 and 1.2.1.
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95 </note>
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96 </tag-desc>
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97
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98 <tag-name><literal>proxy_recursive</literal></tag-name>
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99 <tag-desc>
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100 enables recursive address search (1.3.0, 1.2.1).
518
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101 If recursive search is disabled then instead of an original client
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102 address that matches one of the trusted addresses, the last
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103 address sent in <header>X-Forwarded-For</header> will be used.
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104 If recursive search is enabled then instead an original client
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105 address that matches one of the trusted addresses, the last
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106 non-trusted address sent in <header>X-Forwarded-For</header> will be used.
369
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107 </tag-desc>
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108
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109 <tag-name><literal>ranges</literal></tag-name>
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110 <tag-desc>
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111 indicates that addresses are specified as ranges (0.7.23).
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112 This parameter should be the first.
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113 To speed up loading of a geo base, addresses should be put in increasing order.
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114 </tag-desc>
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115
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116 </list>
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117 </para>
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118
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119 <para>
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120 Example:
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121 <example>
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122 geo $country {
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123 default ZZ;
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124 include conf/geo.conf;
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125 delete 127.0.0.0/16;
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126 proxy 192.168.100.0/24;
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127 proxy 2001:0db8::/32;
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128
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129 127.0.0.0/24 US;
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130 127.0.0.1/32 RU;
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131 10.1.0.0/16 RU;
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132 192.168.1.0/24 UK;
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133 }
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134 </example>
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135 </para>
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136
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137 <para>
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138 The <path>conf/geo.conf</path> file could contain the following lines:
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139 <example>
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140 10.2.0.0/16 RU;
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141 192.168.2.0/24 RU;
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142 </example>
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143 </para>
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144
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145 <para>
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146 A value of the most specific match is used.
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147 For example, for the 127.0.0.1 address the value “<literal>RU</literal>”
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148 will be chosen, not “<literal>US</literal>”.
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149 </para>
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150
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151 <para>
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152 Example with ranges:
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153 <example>
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154 geo $country {
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155 ranges;
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156 default ZZ;
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157 127.0.0.0-127.0.0.0 US;
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158 127.0.0.1-127.0.0.1 RU;
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159 127.0.0.1-127.0.0.255 US;
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160 10.1.0.0-10.1.255.255 RU;
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161 192.168.1.0-192.168.1.255 UK;
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162 }
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163 </example>
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164 </para>
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165
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166 </directive>
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167
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168 </section>
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169
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170 </module>