Mercurial > hg > nginx-site
annotate xml/ru/docs/http/ngx_http_log_module.xml @ 674:c48c0936b4df
Documented internal redirections limit.
author | Vladimir Homutov <vl@nginx.com> |
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date | Fri, 07 Sep 2012 13:00:26 +0000 |
parents | 56fa3cab4ceb |
children | d71e56d56ada |
rev | line source |
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222
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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" |
589 | 12 lang="ru" |
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13 rev="3"> |
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14 |
110
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15 <section id="summary"> |
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16 |
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17 <para> |
271 | 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> |
364 | 52 <value>путь</value> |
53 [<value>формат</value> | |
54 [<literal>buffer</literal>=<value>размер</value>]]</syntax> | |
271 | 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. |
271 | 66 Специальное значение <literal>off</literal> отменяет все директивы |
67 <literal>access_log</literal> для текущего уровня. | |
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68 Если формат не указан, то используется предопределённый формат |
271 | 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 этот размер неограничен. |
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75 </para> |
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76 |
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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 |
271 | 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
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105 Поэтому <link doc="ngx_http_core_module.xml" id="root"/> |
271 | 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> |
271 | 123 <value>название</value> |
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>$body_bytes_sent</var></tag-name> |
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138 <tag-desc> |
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139 число байт, переданных клиенту, за вычетом заголовка ответа; |
271 | 140 переменная совместима с параметром “<literal>%B</literal>” модуля Apache |
141 <literal>mod_log_config</literal> | |
224
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142 </tag-desc> |
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143 |
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144 <tag-name><var>$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 |
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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> |
271 | 166 “<literal>p</literal>” если запрос был pipelined, иначе “<literal>.</literal>” |
224
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167 </tag-desc> |
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168 |
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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>$status</var></tag-name> |
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182 <tag-desc> |
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183 статус ответа |
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184 </tag-desc> |
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185 |
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186 <tag-name><var>$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>$time_local</var></tag-name> |
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192 <tag-desc> |
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193 локальное время в Common Log Format |
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194 </tag-desc> |
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195 |
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196 </list> |
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197 </para> |
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198 |
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199 <para> |
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200 Строки заголовка, переданные клиенту, начинаются с префикса |
271 | 201 “<literal>sent_http_</literal>”, например, |
224
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202 <var>$sent_http_content_range</var>. |
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203 </para> |
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204 |
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205 <para> |
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206 В конфигурации всегда существует предопределённый формат |
271 | 207 “<literal>combined</literal>”: |
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208 <example> |
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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 | 217 |
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218 <directive name="open_log_file_cache"> |
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219 |
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220 <syntax> |
271 | 221 <literal>max</literal>=<value>N</value> |
222 [<literal>inactive</literal>=<value>время</value>] | |
223 [<literal>min_uses</literal>=<value>N</value>] | |
224 [<literal>valid</literal>=<value>время</value>]</syntax> | |
225 <syntax><literal>off</literal></syntax> | |
102
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226 <default>off</default> |
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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> |
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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 | 237 <tag-name><literal>max</literal></tag-name> |
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238 <tag-desc> |
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239 задаёт максимальное число дескрипторов в кэше; |
507 | 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 | 244 <tag-name><literal>inactive</literal></tag-name> |
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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; |
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248 по умолчанию 10 секунд |
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249 </tag-desc> |
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250 |
271 | 251 <tag-name><literal>min_uses</literal></tag-name> |
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252 <tag-desc> |
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253 задаёт минимальное число использований файла в течение |
271 | 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 |
271 | 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 | 266 <tag-name><literal>off</literal></tag-name> |
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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> |