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annotate xml/ru/docs/http/ngx_http_headers_module.xml @ 364:bb51d3e17dd0

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Style fixed.
author Ruslan Ermilov <ru@nginx.com>
date Fri, 27 Jan 2012 10:39:12 +0000
parents 7b6155ac373b
children d4464d7bff6c
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 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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4
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5 <module name="Модуль 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 <literal>ngx_http_headers_module</literal> позволяет выдавать
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13 поля заголовка <header>Expires</header> и <header>Cache-Control</header>,
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14 а также добавлять произвольные поля в заголовок ответа.
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15 </para>
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16
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17 </section>
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18
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19
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20 <section id="example" name="Пример конфигурации">
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21
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22 <para>
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23 <example>
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24 expires 24h;
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25 expires modified +24h;
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26 expires @24h;
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27 expires 0;
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28 expires -1;
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29 expires epoch;
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30 add_header Cache-Control private;
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31 </example>
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32 </para>
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33
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34 </section>
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35
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36
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37 <section id="directives" name="Директивы">
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38
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39 <directive name="add_header">
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40 <syntax><value>имя</value> <value>значение</value></syntax>
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41 <default/>
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42 <context>http</context>
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43 <context>server</context>
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44 <context>location</context>
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45
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46 <para>
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47 Добавляет указанное поле в заголовок ответа при условии, что код ответа
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48 равен 200, 204, 301, 302 или 304.
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49 В значении можно использовать переменные.
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50 </para>
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51
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52 </directive>
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53
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54
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55 <directive name="expires">
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56 <syntax>[<literal>modified</literal>] <value>время</value></syntax>
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57 <syntax>
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58 <literal>epoch</literal> |
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59 <literal>max</literal> |
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60 <literal>off</literal></syntax>
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61 <default>off</default>
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62 <context>http</context>
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63 <context>server</context>
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64 <context>location</context>
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66 <para>
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67 Разрешает или запрещает добавлять или менять поля <header>Expires</header>
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68 и <header>Cache-Control</header> в заголовке ответа.
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69 В качестве параметра можно задать положительное или отрицательное
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70 <link doc="../syntax.xml">время</link>.
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71 </para>
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72
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73 <para>
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74 Время в поле <header>Expires</header> получается как сумма текущего времени
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75 и времени, заданного в директиве.
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76 Если используется параметр <literal>modified</literal> (0.7.0, 0.6.32),
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77 то время получается как сумма
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78 времени модификации файла и времени, заданного в директиве.
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79 </para>
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80
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81 <para>
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82 Кроме того, с помощью префикса “<literal>@</literal>” можно задать
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83 время суток (0.7.9, 0.6.34):
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84 <example>
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85 expires @15h30m;
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86 </example>
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87 </para>
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88
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89 <para>
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90 Параметр <literal>epoch</literal> соответствует абсолютному времени
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91 “<literal>Thu, 01 Jan 1970 00:00:01 GMT</literal>”
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92 (1 января 1970 года 00:00:01 GMT).
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93 Содержимое поля <header>Cache-Control</header> зависит от знака
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94 заданного времени:
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95 <list type="bullet">
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96
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97 <listitem>
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98 отрицательное время — <header>Cache-Control: no-cache</header>.
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99 </listitem>
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100
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101 <listitem>
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102 положительное или равное нулю время —
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103 <header>Cache-Control: max-age=<value>t</value></header>,
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104 где <value>t</value> это время в секундах, заданное в директиве.
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105 </listitem>
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106
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107 </list>
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108 </para>
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109
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110 <para>
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111 Параметр <literal>max</literal> задаёт время
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112 “<literal>Thu, 31 Dec 2037 23:55:55 GMT</literal>”
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113 (31 декабря 2037 23:55:55 GMT) для поля <header>Expires</header>
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114 и 10 лет для поля <header>Cache-Control</header>.
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115 </para>
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116
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117 <para>
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118 Параметр <literal>off</literal> запрещает добавлять или менять поля
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119 <header>Expires</header> и <header>Cache-Control</header> в заголовке ответа.
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120 </para>
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121
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122 </directive>
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123
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124 </section>
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125
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126 </module>