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annotate xml/ru/docs/http/ngx_http_headers_module.xml @ 353:7b6155ac373b

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Revised the Russian version of ngx_http_headers_module and translated it into English.
author Ruslan Ermilov <ru@nginx.com>
date Wed, 25 Jan 2012 13:22:09 +0000
parents 4c6d2c614d2c
children bb51d3e17dd0
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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 <section id="example" name="Пример конфигурации">
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20
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21 <para>
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22 <example>
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23 expires 24h;
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24 expires modified +24h;
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25 expires @24h;
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26 expires 0;
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27 expires -1;
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28 expires epoch;
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29 add_header Cache-Control private;
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30 </example>
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31 </para>
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32
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33 </section>
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34
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35
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36 <section id="directives" name="Директивы">
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37
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38 <directive name="add_header">
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39 <syntax><value>имя</value> <value>значение</value></syntax>
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40 <default/>
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41 <context>http</context>
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42 <context>server</context>
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43 <context>location</context>
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44
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45 <para>
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46 Добавляет указанное поле в заголовок ответа при условии, что код ответа
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47 равен 200, 204, 301, 302 или 304.
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48 В значении можно использовать переменные.
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49 </para>
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50
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51 </directive>
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52
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53
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54 <directive name="expires">
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55 <syntax>[<literal>modified</literal>] <value>время</value></syntax>
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56 <syntax>
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57 <literal>epoch</literal> |
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58 <literal>max</literal> |
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59 <literal>off</literal></syntax>
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60 <default>off</default>
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61 <context>http</context>
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62 <context>server</context>
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63 <context>location</context>
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65 <para>
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66 Разрешает или запрещает добавлять или менять поля <header>Expires</header>
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67 и <header>Cache-Control</header> в заголовке ответа.
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68 В качестве параметра можно задать положительное или отрицательное
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69 <link doc="../syntax.xml">время</link>.
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70 </para>
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71
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72 <para>
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73 Время в поле <header>Expires</header> получается как сумма текущего времени
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74 и времени, заданного в директиве.
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75 Если используется параметр <literal>modified</literal> (0.7.0, 0.6.32),
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76 то время получается как сумма
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77 времени модификации файла и времени, заданного в директиве.
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78 </para>
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79
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80 <para>
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81 Кроме того, с помощью префикса “<literal>@</literal>” можно задать
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82 время суток (0.7.9, 0.6.34):
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83 <example>
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84 expires @15h30m;
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85 </example>
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86 </para>
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87
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88 <para>
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89 Параметр <literal>epoch</literal> соответствует абсолютному времени
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90 “<literal>Thu, 01 Jan 1970 00:00:01 GMT</literal>”
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91 (1 января 1970 года 00:00:01 GMT).
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92 Содержимое поля <header>Cache-Control</header> зависит от знака
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93 заданного времени:
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94 <list type="bullet">
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95
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96 <listitem>
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97 отрицательное время — <header>Cache-Control: no-cache</header>.
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98 </listitem>
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99
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100 <listitem>
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101 положительное или равное нулю время —
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102 <header>Cache-Control: max-age=<value>t</value></header>,
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103 где <value>t</value> это время в секундах, заданное в директиве.
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104 </listitem>
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105
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106 </list>
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107 </para>
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108
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109 <para>
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110 Параметр <literal>max</literal> задаёт время
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111 “<literal>Thu, 31 Dec 2037 23:55:55 GMT</literal>”
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112 (31 декабря 2037 23:55:55 GMT) для поля <header>Expires</header>
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113 и 10 лет для поля <header>Cache-Control</header>.
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114 </para>
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115
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116 <para>
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117 Параметр <literal>off</literal> запрещает добавлять или менять поля
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118 <header>Expires</header> и <header>Cache-Control</header> в заголовке ответа.
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119 </para>
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120
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121 </directive>
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122
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123 </section>
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124
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125 </module>