Mercurial > hg > nginx-site
annotate xml/ru/docs/http/ngx_http_rewrite_module.xml @ 3012:ac4191d05fdf
Fixed link to the server directive in ssl_protocols.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Thu, 14 Sep 2023 21:20:14 +0100 |
parents | dd78dd9e2cb7 |
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rev | line source |
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222
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1 <?xml version="1.0"?> |
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2 |
580
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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 |
382 | 10 <module name="Модуль ngx_http_rewrite_module" |
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11 link="/ru/docs/http/ngx_http_rewrite_module.html" |
589 | 12 lang="ru" |
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13 rev="9"> |
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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> |
382 | 18 Модуль <literal>ngx_http_rewrite_module</literal> позволяет |
1723
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19 изменять URI запроса с помощью регулярных выражений PCRE, делать перенаправления |
391
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20 и выбирать конфигурацию по условию. |
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21 </para> |
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22 |
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23 <para> |
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24 Директивы <link id="break"/>, <link id="if"/>, <link id="return"/>, |
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25 <link id="rewrite"/> и <link id="set"/> |
391
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26 обрабатываются в следующем порядке: |
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27 <list type="bullet"> |
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28 |
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29 <listitem> |
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30 последовательно выполняются директивы этого модуля, описанные на уровне |
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31 <link doc="ngx_http_core_module.xml" id="server"/>; |
391
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32 </listitem> |
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33 |
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34 <listitem> |
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35 в цикле: |
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36 <list type="bullet"> |
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37 |
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38 <listitem> |
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39 ищется |
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40 <link doc="ngx_http_core_module.xml" id="location"/> |
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41 по URI запроса; |
391
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42 </listitem> |
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43 |
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44 <listitem> |
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45 последовательно выполняются директивы этого модуля, |
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46 описанные в найденном location; |
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47 </listitem> |
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48 |
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49 <listitem> |
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50 цикл повторяется, если URI запроса <link id="rewrite">изменялся</link>, |
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51 но не более |
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52 <link doc="ngx_http_core_module.xml" id="internal">10 раз</link>. |
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53 </listitem> |
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54 |
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55 </list> |
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56 </listitem> |
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57 |
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58 </list> |
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59 </para> |
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60 |
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61 </section> |
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62 |
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63 |
382 | 64 <section id="directives" name="Директивы"> |
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65 |
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66 <directive name="break"> |
102
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67 <syntax/> |
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68 <default/> |
382 | 69 <context>server</context> |
70 <context>location</context> | |
71 <context>if</context> | |
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72 |
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73 <para> |
382 | 74 Завершает обработку текущего набора директив модуля |
75 <literal>ngx_http_rewrite_module</literal>. | |
76
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76 </para> |
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77 |
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78 <para> |
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79 Если директива указана внутри |
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80 <link doc="ngx_http_core_module.xml" id="location"/>, |
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81 дальнейшая обработка запроса продолжается в этом location. |
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82 </para> |
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83 |
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84 <para> |
382 | 85 Пример: |
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86 <example> |
382 | 87 if ($slow) { |
88 limit_rate 10k; | |
89 break; | |
90 } | |
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91 </example> |
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92 </para> |
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93 |
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94 </directive> |
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95 |
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96 |
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97 <directive name="if"> |
108
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98 <syntax block="yes">(<value>условие</value>)</syntax> |
99
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99 <default/> |
382 | 100 <context>server</context> |
101 <context>location</context> | |
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102 |
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103 <para> |
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104 Проверяется указанное <value>условие</value>. |
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105 Если оно истинно, то выполняются указанные в фигурных скобках директивы |
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106 этого модуля и запросу назначается конфигурация, указанная внутри |
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107 директивы <literal>if</literal>. |
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108 Конфигурации внутри директив <literal>if</literal> наследуются с |
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109 предыдущего уровня конфигурации. |
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110 </para> |
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111 |
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112 <para> |
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113 В качестве условия могут быть заданы: |
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114 <list type="bullet"> |
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115 |
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116 <listitem> |
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117 имя переменной; ложными значениями переменной являются пустая строка |
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118 или “<literal>0</literal>”; |
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119 <note> |
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120 До версии 1.0.1 ложным значением также являлась любая строка, |
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121 начинающаяся на “<literal>0</literal>”. |
861 | 122 </note> |
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123 </listitem> |
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124 |
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125 <listitem> |
382 | 126 сравнение переменной со строкой с помощью операторов |
127 “<literal>=</literal>” и “<literal>!=</literal>”; | |
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128 </listitem> |
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129 |
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130 <listitem> |
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131 соответствие переменной регулярному выражению с учётом |
382 | 132 регистра символов — “<literal>~</literal>” и без него — “<literal>~*</literal>”. |
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133 В регулярных выражениях можно использовать выделения, которые затем |
391
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134 доступны в виде переменных <var>$1</var>..<var>$9</var>. |
382 | 135 Также можно использовать отрицательные операторы “<literal>!~</literal>” |
136 и “<literal>!~*</literal>”. | |
137 Если в регулярном выражении встречаются символы “<literal>}</literal>” | |
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138 или “<literal>;</literal>”, то всё выражение следует заключить в одинарные |
382 | 139 или двойные кавычки. |
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140 </listitem> |
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141 |
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142 <listitem> |
382 | 143 проверка существования файла с помощью операторов “<literal>-f</literal>” |
144 и “<literal>!-f</literal>”; | |
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145 </listitem> |
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146 |
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147 <listitem> |
382 | 148 проверка существования каталога с помощью операторов “<literal>-d</literal>” |
149 и “<literal>!-d</literal>”; | |
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150 </listitem> |
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151 |
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152 <listitem> |
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153 проверка существования файла, каталога или символической ссылки |
382 | 154 с помощью операторов “<literal>-e</literal>” и “<literal>!-e</literal>”; |
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155 </listitem> |
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156 |
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157 <listitem> |
382 | 158 проверка исполняемости файла с помощью операторов “<literal>-x</literal>” |
159 и “<literal>!-x</literal>”. | |
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160 </listitem> |
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161 |
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162 </list> |
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163 </para> |
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164 |
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165 <para> |
382 | 166 Примеры: |
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167 <example> |
382 | 168 if ($http_user_agent ~ MSIE) { |
169 rewrite ^(.*)$ /msie/$1 break; | |
170 } | |
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171 |
382 | 172 if ($http_cookie ~* "id=([^;]+)(?:;|$)") { |
173 set $id $1; | |
174 } | |
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175 |
382 | 176 if ($request_method = POST) { |
177 return 405; | |
178 } | |
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179 |
382 | 180 if ($slow) { |
181 limit_rate 10k; | |
182 } | |
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183 |
382 | 184 if ($invalid_referer) { |
185 return 403; | |
186 } | |
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187 </example> |
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188 <note> |
382 | 189 Значение встроенной переменной <var>$invalid_referer</var> задаётся директивой |
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190 <link doc="ngx_http_referer_module.xml" id="valid_referers"/>. |
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191 </note> |
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192 </para> |
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193 |
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194 </directive> |
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195 |
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196 |
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197 <directive name="return"> |
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198 <syntax><value>код</value> [<value>текст</value>]</syntax> |
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199 <syntax><value>код</value> <value>URL</value></syntax> |
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200 <syntax><value>URL</value></syntax> |
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201 <default/> |
382 | 202 <context>server</context> |
203 <context>location</context> | |
204 <context>if</context> | |
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205 |
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206 <para> |
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207 Завершает обработку и возвращает клиенту указанный <value>код</value>. |
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208 Нестандартный код 444 закрывает соединение без передачи |
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209 заголовка ответа. |
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210 </para> |
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211 |
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212 <para> |
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213 Начиная с версии 0.8.42 можно задать |
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214 либо URL перенаправления (для кодов 301, 302, 303, 307 и 308) |
548
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215 либо <value>текст</value> тела ответа (для остальных кодов). |
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216 В тексте тела ответа и URL перенаправления можно использовать переменные. |
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217 Как частный случай, URL перенаправления может быть задан как URI, |
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218 локальный для данного сервера, при этом полный URL перенаправления |
966 | 219 формируется согласно схеме запроса (<var>$scheme</var>) и директивам |
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220 <link doc="ngx_http_core_module.xml" id="server_name_in_redirect"/> и |
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221 <link doc="ngx_http_core_module.xml" id="port_in_redirect"/>. |
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222 </para> |
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223 |
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224 <para> |
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225 Кроме того, в качестве единственного параметра можно указать |
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226 <value>URL</value> для временного перенаправления с кодом 302. |
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227 Такой параметр должен начинаться со строк “<literal>http://</literal>”, |
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228 “<literal>https://</literal>” или “<literal>$scheme</literal>”. |
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229 В <value>URL</value> можно использовать переменные. |
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230 </para> |
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231 |
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232 <para> |
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233 <note> |
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234 До версии 0.7.51 можно было возвращать только следующие коды: |
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235 204, 400, 402 — 406, 408, 410, 411, 413, 416 и 500 — 504. |
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236 </note> |
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237 |
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238 <note> |
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239 До версий 1.1.16 и 1.0.13 код 307 не обрабатывался как перенаправление. |
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240 </note> |
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241 |
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242 <note> |
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243 До версии 1.13.0 код 308 не обрабатывался как перенаправление. |
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244 </note> |
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245 </para> |
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246 |
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247 <para> |
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248 См. также директиву <link doc="ngx_http_core_module.xml" id="error_page"/>. |
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249 </para> |
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250 |
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251 </directive> |
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252 |
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253 |
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254 <directive name="rewrite"> |
382 | 255 <syntax> |
256 <value>regex</value> | |
257 <value>замена</value> | |
258 [<value>флаг</value>]</syntax> | |
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259 <default/> |
382 | 260 <context>server</context> |
261 <context>location</context> | |
262 <context>if</context> | |
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263 |
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264 <para> |
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265 Если указанное регулярное выражение соответствует URI запроса, URI изменяется |
391
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266 в соответствии со строкой замены. |
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267 Директивы <literal>rewrite</literal> выполняются последовательно, |
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268 в порядке их следования в конфигурационном файле. |
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269 С помощью флагов можно прекратить дальнейшую обработку директив. |
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270 Если строка замены начинается с “<literal>http://</literal>”, |
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271 “<literal>https://</literal>” или “<literal>$scheme</literal>”, |
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272 то обработка завершается и клиенту возвращается перенаправление. |
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273 </para> |
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274 |
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275 <para> |
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276 Необязательный параметр <value>флаг</value> может быть одним из: |
382 | 277 <list type="tag"> |
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278 |
382 | 279 <tag-name><literal>last</literal></tag-name> |
280 <tag-desc> | |
281 завершает обработку текущего набора директив модуля | |
282 <literal>ngx_http_rewrite_module</literal>, | |
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283 после чего ищется новый location, соответствующий изменённому URI; |
382 | 284 </tag-desc> |
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285 |
382 | 286 <tag-name><literal>break</literal></tag-name> |
287 <tag-desc> | |
288 завершает обработку текущего набора директив модуля | |
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289 <literal>ngx_http_rewrite_module</literal> |
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290 аналогично директиве <link id="break"/>; |
382 | 291 </tag-desc> |
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292 |
382 | 293 <tag-name><literal>redirect</literal></tag-name> |
294 <tag-desc> | |
295 возвращает временное перенаправление с кодом 302; | |
296 используется, если заменяющая строка не начинается с | |
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297 “<literal>http://</literal>”, “<literal>https://</literal>” |
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298 или “<literal>$scheme</literal>”; |
382 | 299 </tag-desc> |
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300 |
382 | 301 <tag-name><literal>permanent</literal></tag-name> |
302 <tag-desc> | |
303 возвращает постоянное перенаправление с кодом 301. | |
304 </tag-desc> | |
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305 |
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306 </list> |
548
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307 Полный URL перенаправлений формируется согласно |
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308 схеме запроса (<var>$scheme</var>) и директив |
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309 <link doc="ngx_http_core_module.xml" id="server_name_in_redirect"/> и |
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310 <link doc="ngx_http_core_module.xml" id="port_in_redirect"/>. |
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311 </para> |
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312 |
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313 <para> |
382 | 314 Пример: |
76
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315 <example> |
391
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316 server { |
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317 ... |
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318 rewrite ^(/download/.*)/media/(.*)\..*$ $1/mp3/$2.mp3 last; |
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319 rewrite ^(/download/.*)/audio/(.*)\..*$ $1/mp3/$2.ra last; |
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320 return 403; |
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321 ... |
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322 } |
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323 </example> |
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324 </para> |
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325 |
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326 <para> |
382 | 327 Если же эти директивы поместить в location “<literal>/download/</literal>”, |
328 то нужно заменить флаг <literal>last</literal> на <literal>break</literal>, | |
329 иначе nginx сделает 10 циклов и вернёт ошибку 500: | |
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330 <example> |
382 | 331 location /download/ { |
332 rewrite ^(/download/.*)/media/(.*)\..*$ $1/mp3/$2.mp3 break; | |
333 rewrite ^(/download/.*)/audio/(.*)\..*$ $1/mp3/$2.ra break; | |
334 return 403; | |
335 } | |
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336 </example> |
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337 </para> |
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338 |
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339 <para> |
391
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340 Если в строке замены указаны новые аргументы запроса, то предыдущие |
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341 аргументы запроса добавляются после них. |
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342 Если такое поведение нежелательно, можно отказаться от этого добавления, |
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343 указав в конце строки замены знак вопроса, например: |
76
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344 <example> |
382 | 345 rewrite ^/users/(.*)$ /show?user=$1? last; |
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346 </example> |
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347 </para> |
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348 |
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349 <para> |
382 | 350 Если в регулярном выражении встречаются символы “<literal>}</literal>” |
391
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351 или “<literal>;</literal>”, то всё выражение следует заключить в одинарные |
382 | 352 или двойные кавычки. |
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353 </para> |
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354 |
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355 </directive> |
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356 |
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357 |
673
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358 <directive name="rewrite_log"> |
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359 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
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360 <default>off</default> |
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361 <context>http</context> |
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362 <context>server</context> |
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363 <context>location</context> |
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364 <context>if</context> |
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365 |
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366 <para> |
703
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367 Разрешает или запрещает записывать в |
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368 <link doc="../ngx_core_module.xml" id="error_log"/> |
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369 на уровне <literal>notice</literal> |
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370 результаты обработки директив модуля <literal>ngx_http_rewrite_module</literal>. |
673
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371 </para> |
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372 |
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373 </directive> |
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374 |
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375 |
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376 <directive name="set"> |
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377 <syntax><value>$переменная</value> <value>значение</value></syntax> |
99
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378 <default/> |
382 | 379 <context>server</context> |
380 <context>location</context> | |
381 <context>if</context> | |
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382 |
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383 <para> |
391
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384 Устанавливает значение указанной переменной. |
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385 В качестве значения можно использовать текст, переменные и их комбинации. |
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386 </para> |
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387 |
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388 </directive> |
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389 |
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390 |
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391 <directive name="uninitialized_variable_warn"> |
271 | 392 <syntax><literal>on</literal> | <literal>off</literal></syntax> |
102
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393 <default>on</default> |
382 | 394 <context>http</context> |
395 <context>server</context> | |
396 <context>location</context> | |
397 <context>if</context> | |
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398 |
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399 <para> |
391
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400 Определяет, нужно ли писать в лог предупреждения о неинициализированных |
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401 переменных. |
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402 </para> |
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403 |
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404 </directive> |
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|
405 |
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406 </section> |
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|
407 |
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408 |
382 | 409 <section id="internals" name="Внутреннее устройство"> |
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|
410 |
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411 <para> |
382 | 412 Директивы модуля <literal>ngx_http_rewrite_module</literal> |
391
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413 компилируются на стадии конфигурации во внутренние инструкции, |
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|
414 интерпретируемые во время обработки запроса. |
382 | 415 Интерпретатор представляет из себя простую стековую виртуальную машину. |
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416 </para> |
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|
417 |
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|
418 <para> |
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|
419 Например, директивы |
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|
420 <example> |
382 | 421 location /download/ { |
422 if ($forbidden) { | |
423 return 403; | |
424 } | |
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425 |
382 | 426 if ($slow) { |
427 limit_rate 10k; | |
428 } | |
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429 |
382 | 430 rewrite ^/(download/.*)/media/(.*)\..*$ /$1/mp3/$2.mp3 break; |
431 } | |
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432 </example> |
391
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433 будут транслированы в такие инструкции: |
76
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434 <example> |
382 | 435 переменная $forbidden |
436 проверка на ноль | |
437 возврат 403 | |
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438 завершение всего кода |
382 | 439 переменная $slow |
440 проверка на ноль | |
441 проверка регулярного выражения | |
442 копирование "/" | |
443 копирование $1 | |
444 копирование "/mp3/" | |
445 копирование $2 | |
446 копирование ".mp3" | |
447 завершение регулярного выражения | |
448 завершение всего кода | |
76
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449 </example> |
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450 </para> |
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|
451 |
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|
452 <para> |
391
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|
453 Обратите внимание, что инструкций для директивы |
382 | 454 <link doc="ngx_http_core_module.xml" id="limit_rate"/> |
455 нет, поскольку она не имеет отношения к модулю | |
456 <literal>ngx_http_rewrite_module</literal>. | |
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457 Для блока <link id="if"/> создаётся отдельная конфигурация. |
391
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458 Если условие истинно, запрос получает эту конфигурацию, |
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459 и в ней <literal>limit_rate</literal> равен 10k. |
76
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|
460 </para> |
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|
461 |
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|
462 <para> |
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|
463 Директиву |
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|
464 <example> |
382 | 465 rewrite ^/(download/.*)/media/(.*)\..*$ /$1/mp3/$2.mp3 break; |
76
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Maxim Dounin <mdounin@mdounin.ru>
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466 </example> |
391
1702722eca07
Cleaned up terminology and language used.
Ruslan Ermilov <ru@nginx.com>
parents:
382
diff
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467 можно сделать на одну инструкцию меньше, если в регулярном выражении перенести |
1702722eca07
Cleaned up terminology and language used.
Ruslan Ermilov <ru@nginx.com>
parents:
382
diff
changeset
|
468 первый слэш внутрь скобок: |
76
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
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469 <example> |
382 | 470 rewrite ^(<emphasis>/</emphasis>download/.*)/media/(.*)\..*$ $1/mp3/$2.mp3 break; |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
471 </example> |
391
1702722eca07
Cleaned up terminology and language used.
Ruslan Ermilov <ru@nginx.com>
parents:
382
diff
changeset
|
472 Тогда соответствующие инструкции будут выглядеть так: |
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Maxim Dounin <mdounin@mdounin.ru>
parents:
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473 <example> |
382 | 474 проверка регулярного выражения |
475 копирование $1 | |
476 копирование "/mp3/" | |
477 копирование $2 | |
478 копирование ".mp3" | |
479 завершение регулярного выражения | |
480 завершение всего кода | |
76
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Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
481 </example> |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
482 </para> |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
483 |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
484 </section> |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
diff
changeset
|
485 |
4a4caa566120
Russian documentation import.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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changeset
|
486 </module> |