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annotate xml/en/docs/http/ngx_http_session_log_module.xml @ 1128:1594ed379f1f

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De-i18n'ed <commercial_version/>. Now the text of a link has to be written verbatim.
author Ruslan Ermilov <ru@nginx.com>
date Fri, 21 Mar 2014 13:15:42 +0400
parents 379cb572a7ec
children 07402a11fd8d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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) Nginx, Inc.
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5 -->
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6
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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8
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9 <module name="Module ngx_http_session_log_module"
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10 link="/en/docs/http/ngx_http_session_log_module.html"
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11 lang="en"
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12 rev="1">
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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_session_log_module</literal> module enables logging
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18 sessions (that is, aggregates of multiple HTTP requests) instead of
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19 individual HTTP requests.
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20 </para>
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21
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22 <para>
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23 <note>
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24 This module is available as part of our
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25 <commercial_version>commercial subscription</commercial_version>.
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26 </note>
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27 </para>
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28
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29 </section>
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30
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31
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32 <section id="example" name="Example Configuration">
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33
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34 <para>
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35 The following configuration sets up a session log and maps requests to
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36 sessions according to the request client address and <header>User-Agent</header>
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37 request header field:
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38 <example>
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39 session_log_zone /path/to/log format=combined
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40 zone=one:1m timeout=30s
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41 md5=$binary_remote_addr$http_user_agent;
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42
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43 location /media/ {
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44 session_log one;
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45 }
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46 </example>
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47 </para>
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48
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49 </section>
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50
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51
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52 <section id="directives" name="Directives">
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53
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54 <directive name="session_log_format">
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55 <syntax>
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56 <value>name</value>
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57 <value>string</value> ...</syntax>
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58 <default>combined "..."</default>
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59 <context>http</context>
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60
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61 <para>
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62 Specifies the output format of a log.
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63 The value of the <var>$body_bytes_sent</var> variable is aggregated across
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64 all requests in a session.
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65 The values of all other variables available for logging correspond to the
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66 first request in a session.
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67 </para>
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68
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69 </directive>
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70
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71
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72 <directive name="session_log_zone">
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73 <syntax>
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74 <value>path</value>
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75 <literal>zone</literal>=<value>name</value>:<value>size</value>
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76 [<literal>format</literal>=<value>format</value>]
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77 [<literal>timeout</literal>=<value>time</value>]
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78 [<literal>id</literal>=<value>id</value>]
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79 [<literal>md5</literal>=<value>md5</value>]
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80 </syntax>
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81 <default/>
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82 <context>http</context>
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83
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84 <para>
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85 Sets the path to a log file and configures the shared memory zone that is used
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86 to store currently active sessions.
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87 </para>
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88
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89 <para>
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90 A session is considered active for as long as the time elapsed since
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91 the last request in the session does not exceed the specified
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92 <literal>timeout</literal> (by default, 30 seconds).
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93 Once a session is no longer active, it is written to the log.
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94 </para>
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95
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96 <para>
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97 The <literal>id</literal> parameter identifies the
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98 session to which a request is mapped.
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99 The <literal>id</literal> parameter is set to the hexadecimal representation
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100 of an MD5 hash (for example, obtained from a cookie using variables).
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101 If this parameter is not specified or does not represent the valid
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102 MD5 hash, nginx computes the MD5 hash from the value of
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103 the <literal>md5</literal> parameter and creates a new session using this hash.
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104 Both the <literal>id</literal> and <literal>md5</literal> parameters
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105 can contain variables.
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106 </para>
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107
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108 <para>
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109 The <literal>format</literal> parameter sets the custom session log
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110 format configured by the <link id="session_log_format"/> directive.
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111 If <literal>format</literal> is not specified, the predefined
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112 “<literal>combined</literal>” format is used.
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113 </para>
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114
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115 </directive>
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116
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117
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118 <directive name="session_log">
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119 <syntax><value>name</value> | <literal>off</literal></syntax>
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120 <default>off</default>
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121 <context>http</context>
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122 <context>server</context>
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123 <context>location</context>
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124
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125 <para>
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126 Enables the use of the specified session log.
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127 The special value <literal>off</literal> cancels all
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128 <literal>session_log</literal> directives inherited from the previous
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129 configuration level.
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130 </para>
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131
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132 </directive>
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133
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134 </section>
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135
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136
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137 <section id="variables" name="Embedded Variables">
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138
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139 <para>
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140 The <literal>ngx_http_session_log_module</literal> module supports
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141 two embedded variables:
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142
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143 <list type="tag">
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144
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145 <tag-name><var>$session_log_id</var></tag-name>
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146 <tag-desc>
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147 current session ID;
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148 </tag-desc>
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149
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150 <tag-name><var>$session_log_binary_id</var></tag-name>
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151 <tag-desc>
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152 current session ID in binary form (16 bytes).
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153 </tag-desc>
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154
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155 </list>
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156 </para>
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157
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158 </section>
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159
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160 </module>