Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_geo_module.xml @ 764:f8434fdd3cd9
The "auto" parameter of the ""worker_processes" directive
was merged into 1.2.5.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Tue, 13 Nov 2012 11:12:24 +0000 |
parents | 81ec181c084e |
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1 <?xml version="1.0"?> |
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2 |
580
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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" |
589 | 12 lang="en" |
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13 rev="2"> |
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14 |
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15 <section id="summary"> |
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16 |
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17 <para> |
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18 The <literal>ngx_http_geo_module</literal> module creates variables |
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19 whose values depend on the client IP address. |
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20 </para> |
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21 |
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22 </section> |
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23 |
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24 |
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25 <section id="example" name="Example Configuration"> |
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26 |
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27 <para> |
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28 <example> |
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29 geo $geo { |
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30 default 0; |
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31 127.0.0.1/32 2; |
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32 192.168.1.0/24 1; |
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33 10.1.0.0/16 1; |
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34 } |
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35 </example> |
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36 </para> |
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37 |
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38 </section> |
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39 |
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40 |
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41 <section id="directives" name="Directives"> |
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42 |
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43 <directive name="geo"> |
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44 <syntax block="yes">[<value>$address</value>] <value>$variable</value></syntax> |
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45 <default/> |
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46 <context>http</context> |
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47 |
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48 <para> |
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49 Describes the dependency of values of the specified variable |
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50 on the client IP address. |
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51 By default an address is taken from the <var>$remote_addr</var> variable |
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52 but it can also be taken from another variable (0.7.27), for example: |
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53 <example> |
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54 geo $arg_remote_addr $geo { |
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55 ...; |
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56 } |
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57 </example> |
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58 </para> |
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59 |
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60 <para> |
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61 <note> |
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62 Since variables are evaluated only when used, the mere existence |
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63 of even a large number of declared “<literal>geo</literal>” variables |
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64 does not incur any extra costs for request processing. |
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65 </note> |
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66 </para> |
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67 |
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68 <para> |
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69 If the value of a variable does not represent a valid IP address |
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70 then the “<literal>255.255.255.255</literal>” address is used. |
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71 </para> |
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72 |
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73 <para> |
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74 Addresses are specified as CIDR or ranges (0.7.23). |
518 | 75 The following special parameters are also supported: |
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76 <list type="tag"> |
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77 |
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78 <tag-name><literal>delete</literal></tag-name> |
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79 <tag-desc> |
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80 deletes the specified network (0.7.23). |
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81 </tag-desc> |
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82 |
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83 <tag-name><literal>default</literal></tag-name> |
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84 <tag-desc> |
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85 a value of variable if the client address does not |
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86 match any of the specified addresses. |
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87 When CIDR is used, “<literal>0.0.0.0/0</literal>” can be written |
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88 instead of <literal>default</literal>. |
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89 </tag-desc> |
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90 |
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91 <tag-name><literal>include</literal></tag-name> |
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92 <tag-desc> |
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93 includes a file with addresses and values. |
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94 There can be several inclusions. |
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95 </tag-desc> |
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96 |
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97 <tag-name><literal>proxy</literal></tag-name> |
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98 <tag-desc> |
518 | 99 defines trusted addresses (0.8.7, 0.7.63). |
100 When a request comes from a trusted address, | |
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101 an address from the <header>X-Forwarded-For</header> request |
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102 header field will be used instead. |
518 | 103 In contrast to the regular addresses, trusted addresses are |
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104 checked sequentially. |
518 | 105 <note> |
523 | 106 IPv6 addresses are supported starting from versions 1.3.0 and 1.2.1. |
518 | 107 </note> |
108 </tag-desc> | |
109 | |
110 <tag-name><literal>proxy_recursive</literal></tag-name> | |
111 <tag-desc> | |
523 | 112 enables recursive address search (1.3.0, 1.2.1). |
518 | 113 If recursive search is disabled then instead of an original client |
114 address that matches one of the trusted addresses, the last | |
115 address sent in <header>X-Forwarded-For</header> will be used. | |
116 If recursive search is enabled then instead an original client | |
117 address that matches one of the trusted addresses, the last | |
118 non-trusted address sent in <header>X-Forwarded-For</header> will be used. | |
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119 </tag-desc> |
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120 |
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121 <tag-name><literal>ranges</literal></tag-name> |
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122 <tag-desc> |
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123 indicates that addresses are specified as ranges (0.7.23). |
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124 This parameter should be the first. |
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125 To speed up loading of a geo base, addresses should be put in increasing order. |
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126 </tag-desc> |
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127 |
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128 </list> |
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129 </para> |
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130 |
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131 <para> |
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132 Example: |
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133 <example> |
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134 geo $country { |
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135 default ZZ; |
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136 include conf/geo.conf; |
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137 delete 127.0.0.0/16; |
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138 proxy 192.168.100.0/24; |
518 | 139 proxy 2001:0db8::/32; |
369
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140 |
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141 127.0.0.0/24 US; |
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142 127.0.0.1/32 RU; |
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143 10.1.0.0/16 RU; |
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144 192.168.1.0/24 UK; |
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145 } |
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146 </example> |
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147 </para> |
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148 |
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149 <para> |
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150 The <path>conf/geo.conf</path> file could contain the following lines: |
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151 <example> |
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152 10.2.0.0/16 RU; |
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153 192.168.2.0/24 RU; |
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154 </example> |
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155 </para> |
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156 |
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157 <para> |
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158 A value of the most specific match is used. |
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159 For example, for the 127.0.0.1 address the value “<literal>RU</literal>” |
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160 will be chosen, not “<literal>US</literal>”. |
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161 </para> |
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162 |
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163 <para> |
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164 Example with ranges: |
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165 <example> |
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166 geo $country { |
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167 ranges; |
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168 default ZZ; |
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169 127.0.0.0-127.0.0.0 US; |
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170 127.0.0.1-127.0.0.1 RU; |
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171 127.0.0.1-127.0.0.255 US; |
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172 10.1.0.0-10.1.255.255 RU; |
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173 192.168.1.0-192.168.1.255 UK; |
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174 } |
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175 </example> |
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176 </para> |
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177 |
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178 </directive> |
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179 |
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180 </section> |
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181 |
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182 </module> |