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annotate xml/en/docs/http/ngx_http_map_module.xml @ 348:5a848934a12d

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English translation of ngx_http_geoip_module, ngx_http_map_module, ngx_http_realip_module, ngx_http_secure_link_module, ngx_http_split_clients_module, and ngx_http_sub_module.
author Ruslan Ermilov <ru@nginx.com>
date Mon, 23 Jan 2012 16:50:35 +0000
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children aef88cb1d75c
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348
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1 <?xml version="1.0"?>
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2
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3 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Module ngx_http_map_module"
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6 link="/en/docs/http/ngx_http_map_module.html"
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7 lang="en">
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8
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9 <section id="summary">
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10
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11 <para>
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12 The <literal>ngx_http_map_module</literal> module creates variables
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13 whose values depend on values of other variables.
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14 </para>
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15
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16 </section>
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17
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18
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19 <section id="example" name="Example Configuration">
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20
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21 <para>
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22 <example>
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23 map $http_host $name {
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24 hostnames;
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25
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26 default 0;
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27
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28 example.com 1;
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29 *.example.com 1;
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30 test.com 2;
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31 *.test.com 2;
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32 .site.com 3;
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33 wap.* 4;
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34 }
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35 </example>
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36 </para>
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37
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38 </section>
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39
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40
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41 <section id="directives" name="Directives">
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42
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43 <directive name="map">
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44 <syntax block="yes">
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45 <value>$variable1</value>
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46 <value>$variable2</value></syntax>
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47 <default/>
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48 <context>http</context>
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49
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50 <para>
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51 Creates a variable whose value
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52 depends on the value of another variable.
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53 The directive supports three special parameters:
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54 <list type="tag">
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55 <tag-name><literal>default</literal> <value>value</value></tag-name>
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56 <tag-desc>
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57 sets a value for the second variable when the value
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58 of the first variable cannot be found.
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59 </tag-desc>
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60
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61 <tag-name><literal>hostnames</literal></tag-name>
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62 <tag-desc>
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63 allows to specify hostnames with a prefix or suffix mask, as source
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64 values, for example,
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65 <example>
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66 *.example.com 1;
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67 example.* 1;
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68 </example>
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69 The following two records
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70 <example>
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71 example.com 1;
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72 *.example.com 1;
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73 </example>
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74 can be combined:
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75 <example>
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76 .example.com 1;
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77 </example>
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78 </tag-desc>
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79
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80 <tag-name><literal>include</literal> <value>file</value></tag-name>
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81 <tag-desc>
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82 includes a file with values.
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83 There can be several inclusions.
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84 </tag-desc>
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85
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86 </list>
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87 </para>
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88
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89 </directive>
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90
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91
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92 <directive name="map_hash_bucket_size">
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93 <syntax><value>size</value></syntax>
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94 <default>32|64|128</default>
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95 <context>http</context>
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96
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97 <para>
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98 Sets the bucket size for the <link id="map"/> variables hash tables.
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99 Default value depends on the size of the processor's cache line.
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100 For more information, please refer to
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101 <link doc="../hash.xml">Setting Up Hashes</link>.
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102 </para>
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103
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104 </directive>
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105
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106
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107 <directive name="map_hash_max_size">
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108 <syntax><value>size</value></syntax>
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109 <default>2048</default>
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110 <context>http</context>
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111
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112 <para>
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113 Sets the maximum <value>size</value> of the <link id="map"/> variables
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114 hash tables.
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115 For more information, please refer to
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116 <link doc="../hash.xml">Setting Up Hashes</link>.
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117 </para>
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118
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119 </directive>
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120
5a848934a12d English translation of ngx_http_geoip_module, ngx_http_map_module,
Ruslan Ermilov <ru@nginx.com>
parents:
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121 </section>
5a848934a12d English translation of ngx_http_geoip_module, ngx_http_map_module,
Ruslan Ermilov <ru@nginx.com>
parents:
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122
5a848934a12d English translation of ngx_http_geoip_module, ngx_http_map_module,
Ruslan Ermilov <ru@nginx.com>
parents:
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123 </module>