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annotate xml/ru/docs/http/ngx_http_log_module.xml @ 617:368a449e85b8

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Expanded documentation of what various parameters of the "listen" directive related to socket options do. While here, documented the fact that accept filters also work on NetBSD.
author Ruslan Ermilov <ru@nginx.com>
date Thu, 02 Aug 2012 13:24:07 +0000
parents 764fbac1b8b4
children ea8773eff48d
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) 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="Модуль ngx_http_log_module"
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11 link="/ru/docs/http/ngx_http_log_module.html"
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12 lang="ru"
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13 rev="1">
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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 Модуль <literal>ngx_http_log_module</literal> записывает логи запросов
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19 в указанном формате.
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20 </para>
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21
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22 <para>
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23 Логи записываются в контексте location’а, где заканчивается обработка.
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24 Это может быть location, отличный от первоначального, если в процессе
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25 обработки запроса происходит
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26 <link doc="ngx_http_core_module.xml" id="internal">внутреннее
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27 перенаправление</link>.
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28 </para>
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29
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30 </section>
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31
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32
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33 <section id="example" name="Пример конфигурации">
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34
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35 <para>
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36 <example>
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37 log_format gzip '$remote_addr - $remote_user [$time_local] '
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38 '"$request" $status $bytes_sent '
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39 '"$http_referer" "$http_user_agent" "$gzip_ratio"';
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40
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41 access_log /spool/logs/nginx-access.log gzip buffer=32k;
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42 </example>
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43 </para>
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44
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45 </section>
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46
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47
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48 <section id="directives" name="Директивы">
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49
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50 <directive name="access_log">
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51 <syntax>
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52 <value>путь</value>
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53 [<value>формат</value>
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54 [<literal>buffer</literal>=<value>размер</value>]]</syntax>
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55 <syntax><literal>off</literal></syntax>
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56 <default>logs/access.log combined</default>
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57 <context>http</context>
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58 <context>server</context>
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59 <context>location</context>
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60 <context>if в location</context>
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61 <context>limit_except</context>
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62
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63 <para>
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64 Задаёт путь, формат и размер буфера для буферизованной записи в лог.
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65 На одном уровне может использоваться несколько логов.
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66 Специальное значение <literal>off</literal> отменяет все директивы
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67 <literal>access_log</literal> для текущего уровня.
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68 Если формат не указан, то используется предопределённый формат
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69 “<literal>combined</literal>”.
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70 </para>
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71
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72 <para>
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73 Размер буфера должен быть не больше размера атомарной записи в дисковый файл.
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74 Для FreeBSD 3.0-6.0 этот размер неограничен.
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75 </para>
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77 <para>
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78 В пути файла можно использовать переменные (0.7.6+),
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79 но такие логи имеют некоторые ограничения:
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80 <list type="bullet">
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81
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82 <listitem>
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83 <link doc="../ngx_core_module.xml" id="user">пользователь</link>,
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84 с правами которого работают рабочие процессы, должен
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85 иметь права на создание файлов в каталоге с такими логами;
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86 </listitem>
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87
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88 <listitem>
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89 не работает буферизация;
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90 </listitem>
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91
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92 <listitem>
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93 файл открывается для каждой записи в лог и сразу же после записи закрывается.
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94 Следует однако иметь в виду, что поскольку дескрипторы часто используемых файлов
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95 могут храниться в <link id="open_log_file_cache">кэше</link>,
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96 то при вращении логов в течение времени, заданного параметром
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97 <literal>valid</literal> директивы <link id="open_log_file_cache"/>,
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98 запись может продолжаться в старый файл.
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99 </listitem>
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100
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101 <listitem>
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102 при каждой записи в лог проверяется существование
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103 <link doc="ngx_http_core_module.xml" id="root">корневого каталога</link>
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104 для запроса — если этот каталог не существует, то лог не создаётся.
106
56457a474903 If text of the link is not provided, the @id is used.
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105 Поэтому <link doc="ngx_http_core_module.xml" id="root"/>
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106 и <literal>access_log</literal> нужно описывать на одном уровне:
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107 <example>
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108 server {
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109 root /spool/vhost/data/$host;
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110 access_log /spool/vhost/logs/$host;
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111 ...
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112 </example>
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113 </listitem>
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114
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115 </list>
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116 </para>
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117
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118 </directive>
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119
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120
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121 <directive name="log_format">
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122 <syntax>
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123 <value>название</value>
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124 <value>строка</value> ...</syntax>
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125 <default>combined "..."</default>
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126 <context>http</context>
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127
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128 <para>
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129 Задаёт формат лога.
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130 </para>
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131
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132 <para>
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133 Кроме общих переменных в формате можно использовать переменные,
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134 существующие только на момент записи в лог:
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135 <list type="tag">
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136
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137 <tag-name><var>$body_bytes_sent</var></tag-name>
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138 <tag-desc>
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139 число байт, переданных клиенту, за вычетом заголовка ответа;
271
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140 переменная совместима с параметром “<literal>%B</literal>” модуля Apache
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141 <literal>mod_log_config</literal>
224
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142 </tag-desc>
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143
224
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144 <tag-name><var>$bytes_sent</var></tag-name>
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145 <tag-desc>
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146 число байт, переданных клиенту
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147 </tag-desc>
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148
224
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149 <tag-name><var>$connection</var></tag-name>
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150 <tag-desc>
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151 порядковый номер соединения
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152 </tag-desc>
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153
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154 <tag-name><var>$connection_requests</var></tag-name>
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155 <tag-desc>
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156 текущее число запросов в соединении
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157 </tag-desc>
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158
224
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159 <tag-name><var>$msec</var></tag-name>
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160 <tag-desc>
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161 время в секундах с точностью до миллисекунд на момент записи в лог
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162 </tag-desc>
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163
224
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164 <tag-name><var>$pipe</var></tag-name>
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165 <tag-desc>
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166 “<literal>p</literal>” если запрос был pipelined, иначе “<literal>.</literal>”
224
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167 </tag-desc>
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168
224
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169 <tag-name><var>$request_length</var></tag-name>
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170 <tag-desc>
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171 длина запроса (включая строку запроса, заголовок и тело запроса)
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172 </tag-desc>
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173
224
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174 <tag-name><var>$request_time</var></tag-name>
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175 <tag-desc>
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176 время обработки запроса в секундах с точностью до миллисекунд;
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177 время, прошедшее с момента чтения первых байт от клиента до
451
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178 момента записи в лог после отправки последних байт клиенту
224
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179 </tag-desc>
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180
224
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181 <tag-name><var>$status</var></tag-name>
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182 <tag-desc>
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183 статус ответа
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184 </tag-desc>
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185
224
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186 <tag-name><var>$time_iso8601</var></tag-name>
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187 <tag-desc>
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188 локальное время в формате по стандарту ISO 8601
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189 </tag-desc>
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190
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191 <tag-name><var>$time_local</var></tag-name>
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192 <tag-desc>
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193 локальное время в Common Log Format
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194 </tag-desc>
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195
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196 </list>
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197 </para>
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198
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199 <para>
224
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200 Строки заголовка, переданные клиенту, начинаются с префикса
271
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201 “<literal>sent_http_</literal>”, например,
224
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202 <var>$sent_http_content_range</var>.
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203 </para>
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204
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205 <para>
224
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206 В конфигурации всегда существует предопределённый формат
271
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207 “<literal>combined</literal>”:
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208 <example>
351
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209 log_format combined '$remote_addr - $remote_user [$time_local] '
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210 '"$request" $status $body_bytes_sent '
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211 '"$http_referer" "$http_user_agent"';
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212 </example>
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213 </para>
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214
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215 </directive>
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216
364
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217
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218 <directive name="open_log_file_cache">
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219
224
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220 <syntax>
271
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221 <literal>max</literal>=<value>N</value>
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222 [<literal>inactive</literal>=<value>время</value>]
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223 [<literal>min_uses</literal>=<value>N</value>]
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224 [<literal>valid</literal>=<value>время</value>]</syntax>
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225 <syntax><literal>off</literal></syntax>
102
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226 <default>off</default>
224
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227 <context>http</context>
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228 <context>server</context>
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229 <context>location</context>
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230
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231 <para>
224
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232 Задаёт кэш, в котором хранятся дескрипторы файлов часто используемых
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233 логов, имена которых заданы с использованием переменных.
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234 Параметры директивы:
224
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235 <list type="tag">
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236
271
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237 <tag-name><literal>max</literal></tag-name>
224
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238 <tag-desc>
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239 задаёт максимальное число дескрипторов в кэше;
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240 при переполнении кэша наименее востребованные (LRU)
224
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241 дескрипторы закрываются
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242 </tag-desc>
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243
271
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244 <tag-name><literal>inactive</literal></tag-name>
224
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245 <tag-desc>
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246 задаёт время, после которого закэшированный дескриптор закрывается,
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247 если к нему не было обращений в течение этого времени;
224
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248 по умолчанию 10 секунд
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249 </tag-desc>
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250
271
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251 <tag-name><literal>min_uses</literal></tag-name>
224
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252 <tag-desc>
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253 задаёт минимальное число использований файла в течение
271
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254 времени, заданного параметром <literal>inactive</literal>,
224
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255 после которого дескриптор файла будет оставаться открытым в кэше;
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256 по умолчанию 1
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257 </tag-desc>
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258
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259 <tag-name><literal>valid</literal></tag-name>
224
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260 <tag-desc>
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261 задаёт, через какое время нужно проверять, что файл ещё
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262 существует под тем же именем;
224
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263 по умолчанию 60 секунд
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264 </tag-desc>
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265
271
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266 <tag-name><literal>off</literal></tag-name>
224
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267 <tag-desc>
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268 запрещает кэш
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269 </tag-desc>
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270
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271 </list>
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272 </para>
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273
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274 <para>
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275 Пример использования:
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276 <example>
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277 open_log_file_cache max=1000 inactive=20s valid=1m min_uses=2;
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278 </example>
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279 </para>
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280
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281 </directive>
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282
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283 </section>
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284
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285 </module>