annotate xml/ru/docs/http/ngx_http_js_module.xml @ 1862:621daf1b77d0

Restricted context of js_include directive to http and stream only.
author Yaroslav Zhuravlev <yar@nginx.com>
date Tue, 13 Dec 2016 17:51:59 +0300
parents 36cbfff92c6d
children 0227aa9b87de
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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) Nginx, Inc.
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5 -->
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6
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7 <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd">
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8
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9 <module name="Модуль ngx_http_js_module"
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10 link="/ru/docs/http/ngx_http_js_module.html"
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11 lang="ru"
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12 rev="5">
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13
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14 <section id="summary">
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15
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16 <para>
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17 Модуль <literal>ngx_http_js_module</literal> позволяет задавать
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18 обработчики location и переменных
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19 на <link doc="../njs_about.xml">nginScript</link> —
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20 подмножестве языка JavaScript.
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21 </para>
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22
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23 <para>
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24 По умолчанию этот модуль не собирается, его необходимо собрать с
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25 модулем nginScript с помощью конфигурационного параметра
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26 <literal>--add_module</literal>:
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27 <example>
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28 ./configure --add-module=<value>path-to-njs</value>/nginx
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29 </example>
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30 <link url="http://hg.nginx.org/njs">Репозиторий</link>
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31 модуля nginScript можно клонировать следующей командой
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32 (необходим клиент <link url="https://www.mercurial-scm.org">Mercurial</link>):
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33 <example>
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34 hg clone http://hg.nginx.org/njs
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35 </example>
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36 Модуль также можно собрать как
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37 <link doc="../ngx_core_module.xml" id="load_module">динамический</link>:
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38 <example>
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39 ./configure --add-dynamic_module=<value>path-to-njs</value>/nginx
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40 </example>
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41 </para>
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42
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43 </section>
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44
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45
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46 <section id="issues" name="Известные проблемы">
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47
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48 <para>
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49 Модуль экспериментальный, поэтому возможно всё.
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50 </para>
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51
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52 </section>
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53
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54
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55 <section id="example" name="Пример конфигурации">
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56
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57 <para>
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58 <example>
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59 js_include http.js;
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60
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61 js_set $foo foo;
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62 js_set $summary summary;
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63
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64 server {
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65 listen 8000;
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66
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67 location / {
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68 add_header X-Foo $foo;
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69 js_content baz;
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70 }
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71
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72 location /summary {
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73 return 200 $summary;
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74 }
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75 }
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76 </example>
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77 </para>
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78
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79 <para>
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80 Файл <path>http.js</path>:
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81 <example>
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82 function foo(req, res) {
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83 req.log("hello from foo() handler");
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84 return "foo";
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85 }
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86
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87 function summary(req, res) {
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88 var a, s, h;
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89
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90 s = "JS summary\n\n";
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91
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92 s += "Method: " + req.method + "\n";
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93 s += "HTTP version: " + req.httpVersion + "\n";
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94 s += "Host: " + req.headers.host + "\n";
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95 s += "Remote Address: " + req.remoteAddress + "\n";
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96 s += "URI: " + req.uri + "\n";
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97
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98 s += "Headers:\n";
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99 for (h in req.headers) {
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100 s += " header '" + h + "' is '" + req.headers[h] + "'\n";
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101 }
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102
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103 s += "Args:\n";
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104 for (a in req.args) {
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105 s += " arg '" + a + "' is '" + req.args[a] + "'\n";
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106 }
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107
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108 return s;
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109 }
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110
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111 function baz(req, res) {
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112 res.headers.foo = 1234;
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113 res.status = 200;
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114 res.contentType = "text/plain; charset=utf-8";
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115 res.contentLength = 15;
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116 res.sendHeader();
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117 res.send("nginx");
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118 res.send("java");
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119 res.send("script");
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120
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121 res.finish();
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122 }
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123 </example>
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124 </para>
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125
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126 </section>
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127
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128
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129 <section id="directives" name="Директивы">
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130
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131 <directive name="js_include">
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132 <syntax><value>файл</value></syntax>
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133 <default/>
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134 <context>http</context>
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135
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136 <para>
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137 Задаёт файл, позволяющий задавать обработчики location и переменных
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138 на nginScript.
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139 </para>
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140
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141 </directive>
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142
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143
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144 <directive name="js_content">
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145 <syntax><value>функция</value></syntax>
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146 <default/>
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147 <context>location</context>
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148 <context>limit_except</context>
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149
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150 <para>
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151 Задаёт функцию nginScript в качестве обработчика содержимого location.
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152 </para>
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153
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154 </directive>
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155
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156
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157 <directive name="js_set">
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158 <syntax>
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159 <value>$переменная</value> <value>функция</value></syntax>
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160 <default/>
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161 <context>http</context>
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162
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163 <para>
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164 Задаёт функцию nginScript для указанной переменной.
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165 </para>
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166
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167 </directive>
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168
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169 </section>
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170
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171
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172 <section id="arguments" name="Аргументы запроса и ответа">
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173 <para>
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174 Каждый HTTP-обработчик nginScript получает два аргумента: запрос и ответ.
1843
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175 </para>
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176
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177 <para>
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178 Объект запроса имеет следующие свойства:
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179 <list type="tag">
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180
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181 <tag-name><literal>uri</literal></tag-name>
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182 <tag-desc>
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183 текущий URI запроса, только чтение
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184 </tag-desc>
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185
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186 <tag-name><literal>method</literal></tag-name>
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187 <tag-desc>
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188 метод запроса, только чтение
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189 </tag-desc>
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190
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191 <tag-name><literal>httpVersion</literal></tag-name>
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192 <tag-desc>
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193 версия HTTP, только чтение
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194 </tag-desc>
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195
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196 <tag-name><literal>remoteAddress</literal></tag-name>
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197 <tag-desc>
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198 адрес клиента, только чтение
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199 </tag-desc>
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200
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201 <tag-name><literal>headers{}</literal></tag-name>
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202 <tag-desc>
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203 объект заголовков запроса, только чтение.
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204 <para>
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205 Например, доступ к заголовку <literal>Header-Name</literal>
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206 можно получить при помощи синтаксиса <literal>headers['Header-Name']</literal>
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207 или <literal>headers.Header_name</literal>
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208 </para>
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209 </tag-desc>
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210
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211 <tag-name><literal>args{}</literal></tag-name>
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212 <tag-desc>
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213 объект аргументов запроса, только чтение
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214 </tag-desc>
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215
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216 <tag-name><literal>variables{}</literal></tag-name>
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217 <tag-desc>
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218 объект переменных nginx, только чтение
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219 </tag-desc>
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220
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221 <tag-name><literal>log(<value>строка</value>)</literal></tag-name>
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222 <tag-desc>
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223 записывает <literal>строку</literal> в лог-файл ошибок
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224 </tag-desc>
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225 </list>
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226 </para>
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227
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228 <para>
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229 Объект ответа имеет следующие свойства:
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230 <list type="tag">
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231
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232 <tag-name><literal>status</literal></tag-name>
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233 <tag-desc>
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234 статус ответа, доступно для записи
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235 </tag-desc>
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236
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237 <tag-name><literal>headers{}</literal></tag-name>
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238 <tag-desc>
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239 объект заголовков ответа
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240 </tag-desc>
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241
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242 <tag-name><literal>contentType</literal></tag-name>
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243 <tag-desc>
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244 значение поля <header>Content-Type</header> заголовка ответа,
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245 доступно для записи
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246 </tag-desc>
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247
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248 <tag-name><literal>contentLength</literal></tag-name>
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249 <tag-desc>
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250 значение поля <header>Content-Length</header> заголовка ответа,
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251 доступно для записи
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252 </tag-desc>
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253 </list>
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254 </para>
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255
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256 <para>
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257 Объект ответа имеет следующие методы:
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258 <list type="tag">
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259
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260 <tag-name><literal>sendHeader()</literal></tag-name>
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261 <tag-desc>
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262 отправляет заголовок HTTP клиенту
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263 </tag-desc>
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264
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265 <tag-name><literal>send(<value>строка</value>)</literal></tag-name>
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266 <tag-desc>
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267 отправляет часть тела ответа клиенту
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268 </tag-desc>
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269
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270 <tag-name><literal>finish()</literal></tag-name>
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271 <tag-desc>
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272 завершает отправку ответа клиенту
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273 </tag-desc>
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274 </list>
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275 </para>
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276
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277 </section>
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278
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279 </module>