Mercurial > hg > nginx-site

annotate xml/ru/docs/http/ngx_http_headers_module.xml @ 271:4c6d2c614d2c

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Cleaned up XML tag mess: - all of <parameter> and <code>, and some of <dirname>, <value>, and <command> were replaced by <literal>; - the rest of <dirname> were replaced by links; - <argument> were replaced by <value>; - <value> is now rendered in HTML in italic; - <literal> and <path> can now contain <value>. Cleaned up terminology mess: - directives take "parameters".
author Ruslan Ermilov <ru@nginx.com>
date Fri, 23 Dec 2011 17:29:59 +0000
parents bfe3eff81d04
children 7b6155ac373b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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="Директивы модуля ngx_http_headers_module"
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6 link="/ru/docs/http/ngx_http_headers_module.html"
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7 lang="ru">
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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 Модуль ngx_http_headers_module позволяет выдавать строки "Expires"
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13 и "Cache-Control" и добавлять произвольные строки в заголовке ответа.
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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 <section name="Примеры конфигурации" id="example">
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19
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20 <para>
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21 <example>
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22 expires 24h;
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23 expires modified +24h;
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24 expires @24h;
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25 expires 0;
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26 expires -1;
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27 expires epoch;
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28 add_header Cache-Control private;
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29 </example>
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30 </para>
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31
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32 </section>
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33
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34
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35 <section name="Директивы" id="directives">
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36
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37 <directive name="add_header">
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38 <syntax><value>название</value> <value>значение</value></syntax>
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1d315ef37215 The case <default/> is now language-agnostic.
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39 <default/>
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40 <context>http, server, location</context>
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41
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42 <para>
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43 Директива добавляет строку в заголовке ответа при условии, что код ответа
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44 равен 200, 204, 301, 302 или 304.
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45 В значении можно использовать переменные.
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46 </para>
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47
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48 </directive>
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49
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50
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51 <directive name="expires">
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52 <syntax>[<literal>modified</literal>] <value>время</value></syntax>
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53 <syntax>
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54 <literal>epoch</literal> |
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55 <literal>max</literal> |
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56 <literal>off</literal></syntax>
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c76a257f3fd4 The directive name is now automatically printed in <default> and <syntax>.
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57 <default>off</default>
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58 <context>http, server, location</context>
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59
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60 <para>
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61 Разрешает или запрещает добавлять или менять строки "Expires"
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62 и "Cache-Control" в заголовке ответа.
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63 В качестве параметра можно задать положительное или отрицательное
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64 <link doc="../syntax.xml">время</link>.
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65 </para>
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66
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67 <para>
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68 Время в строке "Expires" получается как сумма текущего времени
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69 и времени, заданного в директиве.
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70 Если используется параметр "modified" (0.7.0, 0.6.32),
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71 то время получается как сумма
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72 времени модификации файла и времени, заданного в директиве.
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73 </para>
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74
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75 <para>
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76 Кроме того, с помощью префикса "@" можно задать время суток (0.7.9, 0.6.34):
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77 <example>
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78 expires @15h30m;
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79 </example>
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80 </para>
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81
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82 <para>
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83 Параметр "epoch" означает абсолютное время 1 января 1970 года 00:00:01 GMT.
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84 Содержимое строки "Cache-Control" зависит от знака заданного времени:
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85 <list type="bullet">
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86
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87 <listitem>
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88 отрицательное время — "Cache-Control: no-cache".
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89 </listitem>
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90
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91 <listitem>
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92 положительное время или равное нулю — "Cache-Control: max-age=#",
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93 где "#" - это время в секундах, заданное в директиве.
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94 </listitem>
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95
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96 </list>
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97 </para>
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98
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99 <para>
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100 Параметр "max" задаёт время 31 декабря 2037 23:55:55 GMT для строки "Expires"
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101 и 10 лет для строки "Cache-Control".
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102 </para>
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103
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104 <para>
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105 Параметр "off" запрещает добавлять или менять строки "Expires"
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106 и "Cache-Control" в заголовке ответа.
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107 </para>
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108
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109 </directive>
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110
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111 </section>
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112
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113 </module>