Mercurial > hg > nginx-site
annotate xml/ru/docs/http/ngx_http_js_module.xml @ 2797:17ed19394953
Documented the mp4_start_key_frame directive.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Mon, 15 Nov 2021 12:52:47 +0000 |
parents | 005b056c267f |
children | 652356b39f0f |
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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="33"> |
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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/index.xml">njs</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 Инструкция по сборке и установке доступны |
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25 <link doc="../njs/install.xml">здесь</link>. |
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26 </para> |
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27 |
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28 </section> |
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29 |
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30 |
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31 <section id="example" name="Пример конфигурации"> |
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32 |
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33 <para> |
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34 Пример работает начиная с версии |
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35 <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link>. |
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36 <example> |
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37 http { |
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38 js_import http.js; |
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39 |
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40 js_set $foo http.foo; |
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41 js_set $summary http.summary; |
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42 js_set $hash http.hash; |
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43 |
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44 resolver 10.0.0.1; |
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45 |
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46 server { |
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47 listen 8000; |
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48 |
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49 location / { |
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50 add_header X-Foo $foo; |
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51 js_content http.baz; |
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52 } |
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53 |
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54 location = /summary { |
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55 return 200 $summary; |
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56 } |
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57 |
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58 location = /hello { |
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59 js_content http.hello; |
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60 } |
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61 |
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62 # начиная с версии 0.7.0 |
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63 location = /fetch { |
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64 js_content http.fetch; |
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65 js_fetch_trusted_certificate /path/to/ISRG_Root_X1.pem; |
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66 } |
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67 |
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68 # начиная с версии 0.7.0 |
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69 location = /crypto { |
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70 add_header Hash $hash; |
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71 return 200; |
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72 } |
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73 } |
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74 } |
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75 </example> |
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76 </para> |
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77 |
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78 <para> |
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79 Файл <path>http.js</path>: |
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80 <example> |
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81 function foo(r) { |
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82 r.log("hello from foo() handler"); |
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83 return "foo"; |
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84 } |
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85 |
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86 function summary(r) { |
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87 var a, s, h; |
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88 |
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89 s = "JS summary\n\n"; |
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90 |
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91 s += "Method: " + r.method + "\n"; |
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92 s += "HTTP version: " + r.httpVersion + "\n"; |
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93 s += "Host: " + r.headersIn.host + "\n"; |
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94 s += "Remote Address: " + r.remoteAddress + "\n"; |
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95 s += "URI: " + r.uri + "\n"; |
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96 |
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97 s += "Headers:\n"; |
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98 for (h in r.headersIn) { |
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99 s += " header '" + h + "' is '" + r.headersIn[h] + "'\n"; |
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100 } |
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101 |
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102 s += "Args:\n"; |
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103 for (a in r.args) { |
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104 s += " arg '" + a + "' is '" + r.args[a] + "'\n"; |
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105 } |
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106 |
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107 return s; |
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108 } |
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109 |
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110 function baz(r) { |
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111 r.status = 200; |
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112 r.headersOut.foo = 1234; |
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113 r.headersOut['Content-Type'] = "text/plain; charset=utf-8"; |
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114 r.headersOut['Content-Length'] = 15; |
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115 r.sendHeader(); |
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116 r.send("nginx"); |
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117 r.send("java"); |
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118 r.send("script"); |
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119 |
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120 r.finish(); |
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121 } |
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122 |
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123 function hello(r) { |
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124 r.return(200, "Hello world!"); |
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125 } |
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126 |
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127 // начиная с версии 0.7.0 |
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128 async function fetch(r) { |
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129 let results = await Promise.all([ngx.fetch('https://nginx.org/'), |
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130 ngx.fetch('https://nginx.org/en/')]); |
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131 |
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132 r.return(200, JSON.stringify(results, undefined, 4)); |
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133 } |
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134 |
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135 // начиная с версии 0.7.0 |
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136 async function hash(r) { |
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137 let hash = await crypto.subtle.digest('SHA-512', r.headersIn.host); |
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138 r.setReturnValue(Buffer.from(hash).toString('hex')); |
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139 } |
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140 |
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141 export default {foo, summary, baz, hello, fetch, hash}; |
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142 </example> |
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143 </para> |
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144 |
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145 </section> |
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146 |
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147 |
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148 <section id="directives" name="Директивы"> |
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149 |
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150 <directive name="js_body_filter"> |
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151 <syntax><value>функция</value> | <value>модуль.функция</value> |
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152 [<value>buffer_type</value>=<value>строка</value> | <value>буфер</value>]</syntax> |
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153 <default/> |
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154 <context>location</context> |
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155 <context>limit_except</context> |
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156 <appeared-in>0.5.2</appeared-in> |
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157 |
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158 <para> |
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159 Задаёт функцию njs в качестве фильтра тела ответа. |
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160 Функция фильтра вызывается для каждого блока данных тела ответа |
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161 со следующими аргументами: |
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162 |
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163 <list type="tag"> |
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164 <tag-name><literal>r</literal></tag-name> |
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165 <tag-desc> |
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166 объект <link doc="../njs/reference.xml" id="http">HTTP request</link> |
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167 </tag-desc> |
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168 |
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169 <tag-name><literal>data</literal></tag-name> |
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170 <tag-desc> |
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171 входящий блок данных |
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172 может быть строкой или буфером |
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173 в зависимости от значения <literal>buffer_type</literal>, |
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174 по умолчанию является строкой. |
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175 </tag-desc> |
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176 |
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177 <tag-name><literal>flags</literal></tag-name> |
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178 <tag-desc> |
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179 объект со следующими свойствами: |
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180 <list type="tag"> |
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181 <tag-name><literal>last</literal></tag-name> |
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182 <tag-desc> |
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183 логическое значение, true, если данные являются последним буфером. |
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184 </tag-desc> |
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185 |
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186 </list> |
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187 </tag-desc> |
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188 |
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189 </list> |
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190 </para> |
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191 |
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192 <para> |
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193 Функция фильтра может передавать свою модифицированную версию |
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194 входящего блока данных следующему фильтру тела ответа при помощи вызова |
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195 <link doc="../njs/reference.xml" id="r_sendbuffer"><literal>r.sendBuffer()</literal></link>. |
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196 Пример преобразования букв в нижний регистр в теле ответа: |
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197 <example> |
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198 function filter(r, data, flags) { |
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199 r.sendBuffer(data.toLowerCase(), flags); |
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200 } |
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201 </example> |
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202 Для отмены фильтра (блоки данных будут передаваться клиенту |
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203 без вызова <literal>js_body_filter</literal>), |
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204 можно использовать |
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205 <link doc="../njs/reference.xml" id="r_done"><literal>r.done()</literal></link>. |
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206 </para> |
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207 |
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208 <para> |
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209 Если функция фильтра изменяет длину тела ответа, то |
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210 необходимо очистить заголовок ответа <header>Content-Length</header> |
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211 (если присутствует) в |
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212 <link id="js_header_filter"><literal>js_header_filter</literal></link>, |
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213 чтобы применить поблочное кодирование. |
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214 </para> |
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215 |
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216 <para> |
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217 <note> |
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218 Так как обработчик <literal>js_body_filter</literal> |
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219 должен сразу возвращать результат, |
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220 то поддерживаются только синхронные операции, |
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221 Таким образом, асинхронные операции, например |
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222 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link> |
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223 или |
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224 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>, |
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225 не поддерживаются. |
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226 </note> |
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227 </para> |
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228 |
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229 </directive> |
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230 |
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231 |
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232 <directive name="js_content"> |
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233 <syntax><value>функция</value> | <value>модуль.функция</value></syntax> |
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234 <default/> |
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235 <context>location</context> |
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236 <context>limit_except</context> |
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237 |
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238 <para> |
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239 Задаёт функцию njs в качестве обработчика содержимого location. |
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240 Начиная с версии <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link> |
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241 можно ссылаться на функцию модуля. |
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242 </para> |
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243 |
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244 </directive> |
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245 |
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246 |
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247 <directive name="js_fetch_ciphers"> |
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248 <syntax><value>шифры</value></syntax> |
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249 <default>HIGH:!aNULL:!MD5</default> |
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250 <context>http</context> |
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251 <context>server</context> |
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252 <context>location</context> |
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253 <appeared-in>0.7.0</appeared-in> |
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254 |
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255 <para> |
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256 Описывает разрешённые шифры для HTTPS-запросов |
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257 при помощи <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>. |
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258 Шифры задаются в формате, поддерживаемом библиотекой OpenSSL. |
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259 </para> |
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260 |
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261 <para> |
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262 Полный список можно посмотреть с помощью команды |
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263 “<command>openssl ciphers</command>”. |
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264 </para> |
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265 |
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266 </directive> |
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267 |
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268 |
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269 <directive name="js_fetch_protocols"> |
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270 <syntax> |
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271 [<literal>TLSv1</literal>] |
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272 [<literal>TLSv1.1</literal>] |
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273 [<literal>TLSv1.2</literal>] |
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274 [<literal>TLSv1.3</literal>]</syntax> |
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275 <default>TLSv1 TLSv1.1 TLSv1.2</default> |
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276 <context>http</context> |
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277 <context>server</context> |
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278 <context>location</context> |
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279 <appeared-in>0.7.0</appeared-in> |
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280 |
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281 <para> |
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282 Разрешает указанные протоколы для HTTPS-запросов |
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283 при помощи <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>. |
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284 </para> |
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285 |
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286 </directive> |
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287 |
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288 |
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289 <directive name="js_fetch_trusted_certificate"> |
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290 <syntax><value>файл</value></syntax> |
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291 <default/> |
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292 <context>http</context> |
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293 <context>server</context> |
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294 <context>location</context> |
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295 <appeared-in>0.7.0</appeared-in> |
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296 |
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297 <para> |
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298 Задаёт <value>файл</value> с доверенными сертификатами CA в формате PEM, |
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299 используемыми при |
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300 <link doc="../njs/reference.xml" id="fetch_verify">проверке</link> |
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301 HTTPS-сертификата |
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302 при помощи <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>. |
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303 </para> |
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304 |
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305 </directive> |
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306 |
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307 |
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308 <directive name="js_fetch_verify_depth"> |
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309 <syntax><value>число</value></syntax> |
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310 <default>100</default> |
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311 <context>http</context> |
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312 <context>server</context> |
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313 <context>location</context> |
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314 <appeared-in>0.7.0</appeared-in> |
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315 |
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316 <para> |
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317 Устанавливает глубину проверки в цепочке HTTPS-сертификатов |
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318 при помощи <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>. |
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319 </para> |
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320 |
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321 </directive> |
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322 |
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323 |
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324 <directive name="js_header_filter"> |
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325 <syntax><value>функция</value> | <value>модуль.функция</value></syntax> |
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326 <default/> |
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327 <context>location</context> |
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328 <context>limit_except</context> |
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329 <appeared-in>0.5.1</appeared-in> |
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330 |
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331 <para> |
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332 Задаёт функцию njs в качестве фильтра заголовка ответа. |
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333 Директива позволяет менять произвольные поля заголовка ответа. |
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334 </para> |
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335 |
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336 <para> |
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337 <note> |
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338 Так как обработчик <literal>js_header_filter</literal> |
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339 должен сразу возвращать результат, |
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340 то поддерживаются только синхронные операции, |
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341 Таким образом, асинхронные операции, например |
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342 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link> |
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343 или |
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344 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>, |
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345 не поддерживаются. |
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346 </note> |
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347 </para> |
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348 |
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349 </directive> |
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350 |
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351 |
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352 <directive name="js_import"> |
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353 <syntax><value>модуль.js</value> | |
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354 <value>имя_экспорта из модуль.js</value></syntax> |
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355 <default/> |
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356 <context>http</context> |
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357 <appeared-in>0.4.0</appeared-in> |
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358 |
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|
359 <para> |
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360 Импортирует модуль, позволяющий задавать обработчики location и переменных |
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361 на njs. |
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362 <literal>Имя_экспорта</literal> является пространством имён |
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363 при доступе к функциям модуля. |
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364 Если <literal>имя_экспорта</literal> не задано, |
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365 то пространством имён будет являться имя модуля. |
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366 <example> |
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367 js_import http.js; |
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368 </example> |
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369 В примере при доступе к экспорту в качестве |
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370 пространства имён используется имя модуля <literal>http</literal>. |
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371 Если импортируемый модуль экспортирует <literal>foo()</literal>, |
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372 то для доступа используется <literal>http.foo</literal>. |
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373 </para> |
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|
374 |
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375 <para> |
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376 Директив <literal>js_import</literal> может быть несколько. |
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377 </para> |
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|
378 |
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|
379 </directive> |
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|
380 |
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|
381 |
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|
382 <directive name="js_include"> |
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383 <syntax><value>файл</value></syntax> |
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|
384 <default/> |
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|
385 <context>http</context> |
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|
386 |
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|
387 <para> |
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388 Задаёт файл, позволяющий задавать обработчики location и переменных на njs: |
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|
389 <example> |
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|
390 nginx.conf: |
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|
391 js_include http.js; |
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|
392 location /version { |
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|
393 js_content version; |
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|
394 } |
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Documented the js_import directive and corresponding changes.
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|
395 |
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Documented the js_import directive and corresponding changes.
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|
396 http.js: |
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|
397 function version(r) { |
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|
398 r.return(200, njs.version); |
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|
399 } |
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|
400 </example> |
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|
401 </para> |
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Documented the js_import directive and corresponding changes.
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|
402 |
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Documented the js_import directive and corresponding changes.
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|
403 <para> |
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|
404 Директива устарела начиная с |
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|
405 <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link>, |
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|
406 вместо неё следует использовать директиву <link id="js_import"/>. |
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|
407 </para> |
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changeset
|
408 |
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|
409 </directive> |
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diff
changeset
|
410 |
3492eb9b8138
Translated http and stream js modules into Russian.
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diff
changeset
|
411 |
2352
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Documented the js_path directive.
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|
412 <directive name="js_path"> |
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Documented the js_path directive.
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|
413 <syntax> |
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Documented the js_path directive.
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|
414 <value>путь</value></syntax> |
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Documented the js_path directive.
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|
415 <default/> |
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Documented the js_path directive.
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|
416 <context>http</context> |
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Documented the js_path directive.
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|
417 <appeared-in>0.3.0</appeared-in> |
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Documented the js_path directive.
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|
418 |
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Documented the js_path directive.
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|
419 <para> |
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Documented the js_path directive.
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|
420 Задаёт дополнительный путь для модулей njs. |
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Documented the js_path directive.
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|
421 </para> |
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Documented the js_path directive.
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changeset
|
422 |
1101e24c6d14
Documented the js_path directive.
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diff
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|
423 </directive> |
1101e24c6d14
Documented the js_path directive.
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diff
changeset
|
424 |
1101e24c6d14
Documented the js_path directive.
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diff
changeset
|
425 |
1843
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diff
changeset
|
426 <directive name="js_set"> |
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changeset
|
427 <syntax> |
2530
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|
428 <value>$переменная</value> <value>функция</value> | |
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|
429 <value>модуль.функция</value></syntax> |
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|
430 <default/> |
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diff
changeset
|
431 <context>http</context> |
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diff
changeset
|
432 |
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diff
changeset
|
433 <para> |
2686
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|
434 Задаёт <literal>функцию</literal> njs |
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Improved description of js_set.
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|
435 для указанной <literal>переменной</literal>. |
2530
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Documented the js_import directive and corresponding changes.
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|
436 Начиная с <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link> |
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Documented the js_import directive and corresponding changes.
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|
437 можно ссылаться на функцию модуля. |
1843
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changeset
|
438 </para> |
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Translated http and stream js modules into Russian.
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diff
changeset
|
439 |
2686
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Improved description of js_set.
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|
440 <para> |
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Improved description of js_set.
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changeset
|
441 Функция вызывается в момент |
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Improved description of js_set.
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|
442 первого обращения к переменной для данного запроса. |
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Improved description of js_set.
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|
443 Точный момент вызова функции зависит от |
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Improved description of js_set.
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|
444 <link doc="../dev/development_guide.xml" id="http_phases">фазы</link>, |
45214e5316cd
Improved description of js_set.
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|
445 в которой происходит обращение к переменной. |
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Improved description of js_set.
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|
446 Это можно использовать для реализации дополнительной логики, |
45214e5316cd
Improved description of js_set.
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|
447 не относящейся к вычислению переменной. |
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Improved description of js_set.
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|
448 Например, если переменная указана |
45214e5316cd
Improved description of js_set.
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|
449 в директиве <link doc="ngx_http_log_module.xml" id="log_format"/>, |
45214e5316cd
Improved description of js_set.
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|
450 то её обработчик не будет выполняться до фазы записи в лог. |
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Improved description of js_set.
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|
451 Этот обработчик также может использоваться для выполнения процедур |
45214e5316cd
Improved description of js_set.
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|
452 непосредственно перед освобождением запроса. |
45214e5316cd
Improved description of js_set.
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|
453 </para> |
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diff
changeset
|
454 |
2747
42fb92e582db
Added note to js_set about asyncronous calls.
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2693
diff
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|
455 <para> |
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|
456 <note> |
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|
457 Так как обработчик <literal>js_set</literal> |
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diff
changeset
|
458 должен сразу возвращать результат, |
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459 то поддерживаются только синхронные операции, |
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460 Таким образом, асинхронные операции, например |
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461 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link> |
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462 или |
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463 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>, |
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464 не поддерживаются. |
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465 </note> |
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466 </para> |
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467 |
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468 </directive> |
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469 |
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470 |
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471 <directive name="js_var"> |
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472 <syntax><value>$переменная</value> [<value>значение</value>]</syntax> |
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473 <default/> |
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474 <context>http</context> |
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475 <appeared-in>0.5.3</appeared-in> |
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476 |
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477 <para> |
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478 Объявляет |
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479 <link doc="../njs/reference.xml" id="r_variables">перезаписываемую</link> |
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480 переменную. |
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481 В качестве значения можно использовать текст, переменные и их комбинации. |
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482 Переменная не перезаписывается после перенаправления, |
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483 в отличие от переменных, созданных при помощи |
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484 директивы <link doc="ngx_http_rewrite_module.xml" id="set"/>. |
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485 </para> |
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486 |
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487 </directive> |
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488 |
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489 </section> |
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490 |
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491 |
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492 <section id="arguments" name="Аргумент запроса"> |
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493 |
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494 <para> |
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495 Каждый HTTP-обработчик njs получает один аргумент, |
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496 <link doc="../njs/reference.xml" id="http">объект</link> запроса. |
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497 </para> |
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498 |
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499 </section> |
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500 |
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501 </module> |