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Moved njs HTTP and Stream API to a separate page.
author Yaroslav Zhuravlev <yar@nginx.com>
date Tue, 05 Jun 2018 18:22:00 +0300
parents
children 7865ca0da0ab
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2175
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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 article SYSTEM "../../../../dtd/article.dtd">
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8
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9 <article name="njs API"
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10 link="/ru/docs/njs/njs_api.html"
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11 lang="ru"
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12 rev="1">
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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 <link doc="../njs_about.xml">njs</link> предоставляет объекты, методы и свойства
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18 для расширения функциональности nginx.
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19 </para>
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20
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21 </section>
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22
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23
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24 <section id="http" name="HTTP">
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25
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26 <para>
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27 Объекты <literal>HTTP</literal> доступны только в
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28 модуле <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link>.
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29 </para>
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30
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31
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32 <section id="http_request" name="Запрос">
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33
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34 <para>
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35 <list type="tag">
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36
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37 <tag-name><literal>req.uri</literal></tag-name>
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38 <tag-desc>
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39 текущий URI запроса, только чтение
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40 </tag-desc>
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41
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42 <tag-name><literal>req.method</literal></tag-name>
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43 <tag-desc>
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44 метод запроса, только чтение
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45 </tag-desc>
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46
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47 <tag-name><literal>req.httpVersion</literal></tag-name>
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48 <tag-desc>
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49 версия HTTP, только чтение
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50 </tag-desc>
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51
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52 <tag-name><literal>req.remoteAddress</literal></tag-name>
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53 <tag-desc>
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54 адрес клиента, только чтение
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55 </tag-desc>
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56
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57 <tag-name><literal>req.headers{}</literal></tag-name>
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58 <tag-desc>
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59 объект заголовков запроса, только чтение.
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60 <para>
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61 Например, доступ к заголовку <literal>Header-Name</literal>
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62 можно получить при помощи синтаксиса <literal>headers['Header-Name']</literal>
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63 или <literal>headers.Header_name</literal>
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64 </para>
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65 </tag-desc>
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66
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67 <tag-name><literal>req.args{}</literal></tag-name>
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68 <tag-desc>
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69 объект аргументов запроса, только чтение
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70 </tag-desc>
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71
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72 <tag-name><literal>req.variables{}</literal></tag-name>
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73 <tag-desc>
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74 объект переменных nginx, только чтение
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75 </tag-desc>
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76
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77 <tag-name><literal>req.response</literal></tag-name>
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78 <tag-desc>
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79 объект <link id="http_response_object">ответа</link> (0.2.0), только чтение
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80 </tag-desc>
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81
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82 <tag-name><literal>req.log(<value>строка</value>)</literal></tag-name>
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83 <tag-desc>
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84 записывает <literal>строку</literal> в лог-файл ошибок
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85 на уровне лога <literal>info</literal>
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86 </tag-desc>
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87
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88 <tag-name><literal>req.warn(<value>строка</value>)</literal></tag-name>
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89 <tag-desc>
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90 записывает <literal>строку</literal> в лог-файл ошибок
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91 на уровне лога <literal>warning</literal> (0.2.0)
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92 </tag-desc>
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93
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94 <tag-name><literal>req.error(<value>строка</value>)</literal></tag-name>
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95 <tag-desc>
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96 записывает <literal>строку</literal> в лог-файл ошибок
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97 на уровне лога <literal>error</literal> (0.2.0)
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98 </tag-desc>
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99
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100 <tag-name id="subrequest"><literal>req.subrequest(<value>uri</value>[,
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101 <value>options</value>[, <value>callback</value>]])</literal></tag-name>
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102 <tag-desc>
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103 создаёт подзапрос с заданными <literal>uri</literal> и
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104 <literal>options</literal> и
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105 устанавливает необязательный <literal>callback</literal> завершения (0.2.0).
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106
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107 <para>
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108 Если <literal>options</literal> является строкой, то в ней
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109 содержится срока аргументов подзапроса.
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110 В противном случае ожидается, что <literal>options</literal> является объектом
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111 со следующими ключами:
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112 <list type="tag">
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113 <tag-name><literal>args</literal></tag-name>
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114 <tag-desc>
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115 строка с аргументами
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116 </tag-desc>
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117
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118 <tag-name><literal>body</literal></tag-name>
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119 <tag-desc>
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120 тело запроса
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121 </tag-desc>
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122
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123 <tag-name><literal>method</literal></tag-name>
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124 <tag-desc
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125 >метод HTTP
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126 </tag-desc>
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127
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128 </list>
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129 </para>
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130
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131 <para>
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132 <literal>callback</literal>
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133 получает объект <link id="http_reply">reply</link>.
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134 </para>
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135 </tag-desc>
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136
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137 </list>
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138 </para>
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139
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140 </section>
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141
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142
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143 <section id="http_response" name="Ответ">
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144
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145 <para>
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146 <list type="tag">
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147
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148 <tag-name><literal>res.status</literal></tag-name>
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149 <tag-desc>
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150 статус ответа, доступно для записи
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151 </tag-desc>
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152
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153 <tag-name><literal>res.headers{}</literal></tag-name>
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154 <tag-desc>
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155 объект заголовков ответа
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156 </tag-desc>
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157
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158 <tag-name><literal>res.contentType</literal></tag-name>
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159 <tag-desc>
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160 значение поля <header>Content-Type</header> заголовка ответа,
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161 доступно для записи
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162 </tag-desc>
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163
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164 <tag-name><literal>res.contentLength</literal></tag-name>
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165 <tag-desc>
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166 значение поля <header>Content-Length</header> заголовка ответа,
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167 доступно для записи
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168 </tag-desc>
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169
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170 <tag-name><literal>res.sendHeader()</literal></tag-name>
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171 <tag-desc>
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172 отправляет заголовок HTTP клиенту
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173 </tag-desc>
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174
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175 <tag-name><literal>res.send(<value>строка</value>)</literal></tag-name>
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176 <tag-desc>
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177 отправляет часть тела ответа клиенту
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178 </tag-desc>
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179
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180 <tag-name><literal>res.finish()</literal></tag-name>
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181 <tag-desc>
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182 завершает отправку ответа клиенту
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183 </tag-desc>
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184
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185 <tag-name><literal>res.return(код[, строка])</literal></tag-name>
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186 <tag-desc>
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187 отправляет
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188 клиенту полный ответ с указанным <literal>кодом</literal> (0.2.0)
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189 <para>
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190 Можно задать или URL перенаправления
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191 (для кодов 301, 302, 303, 307 и 308),
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192 или текст тела ответа (для остальных кодов) в качестве второго аргумента
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193 </para>
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194 </tag-desc>
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195
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196 </list>
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197 </para>
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198
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199 </section>
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200
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201
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202 <section id="http_reply" name="Reply">
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203
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204 <para>
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205 <list type="tag">
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206
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207 <tag-name><literal>reply.uri</literal></tag-name>
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208 <tag-desc>
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209 текущий URI, только чтение
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210 </tag-desc>
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211
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212 <tag-name><literal>reply.method</literal></tag-name>
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213 <tag-desc>
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214 метод, только чтение
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215 </tag-desc>
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216
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217 <tag-name><literal>reply.status</literal></tag-name>
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218 <tag-desc>
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219 статус, доступно для записи
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220 </tag-desc>
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221
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222 <tag-name><literal>reply.contentType</literal></tag-name>
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223 <tag-desc>
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224 значение поля <header>Content-Type</header> заголовка,
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225 доступно для записи
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226 </tag-desc>
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227
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228 <tag-name><literal>reply.contentLength</literal></tag-name>
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229 <tag-desc>
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230 значение поля <header>Content-Length</header> заголовка,
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231 доступно для записи
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232 </tag-desc>
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233
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234 <tag-name><literal>reply.headers{}</literal></tag-name>
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235 <tag-desc>
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236 объект заголовков ответа, только чтение
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237 </tag-desc>
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238
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239 </list>
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240 </para>
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241
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242 <para>
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243 Кроме того, у объект <literal>reply</literal> имеет
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244 следующие свойства:
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245
cd4889fdcfa4 Moved njs HTTP and Stream API to a separate page.
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246 <list type="tag">
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247
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248 <tag-name><literal>reply.body</literal></tag-name>
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249 <tag-desc>
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250 хранит тело ответа подзапроса
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251 </tag-desc>
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252
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253 <tag-name><literal>reply.parent</literal></tag-name>
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254 <tag-desc>
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255 ссылается на родительский объект запроса
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256 </tag-desc>
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257
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258 </list>
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259 </para>
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260
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261 </section>
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262
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263 </section>
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264
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265
cd4889fdcfa4 Moved njs HTTP and Stream API to a separate page.
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266 <section id="stream" name="Stream">
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267
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268 <para>
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269 Объекты <literal>stream</literal> доступны только в
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270 модуле
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271 <link doc="../stream/ngx_stream_js_module.xml">ngx_stream_js_module</link>.
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272 </para>
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273
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274
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275 <section id="stream_session" name="Сессия">
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276
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277 <para>
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278 <list type="tag">
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279
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280 <tag-name><literal>s.remoteAddress</literal></tag-name>
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281 <tag-desc>
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282 адрес клиента, только чтение
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283 </tag-desc>
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284
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285 <tag-name><literal>s.eof</literal></tag-name>
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286 <tag-desc>
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287 логическое свойство,
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288 true, если текущий буфер является последним буфером,
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289 только чтение
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290 </tag-desc>
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291
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292 <tag-name><literal>s.fromUpstream</literal></tag-name>
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293 <tag-desc>
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294 логическое свойство,
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295 true, если текущий буфер является буфером от проксируемого сервера к клиенту,
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296 только чтение
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297 </tag-desc>
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298
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299 <tag-name><literal>s.buffer</literal></tag-name>
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300 <tag-desc>
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301 текущий буфер, доступен для записи
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302 </tag-desc>
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303
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304 <tag-name><literal>s.variables{}</literal></tag-name>
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305 <tag-desc>
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306 объект переменных nginx, только чтение
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307 </tag-desc>
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308
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309 <tag-name><literal>s.OK</literal></tag-name>
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310 <tag-desc>
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311 код <literal>OK</literal>
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312 </tag-desc>
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313
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314 <tag-name><literal>s.DECLINED</literal></tag-name>
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315 <tag-desc>
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316 код <literal>DECLINED</literal>
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317 </tag-desc>
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318
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319 <tag-name><literal>s.AGAIN</literal></tag-name>
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320 <tag-desc>
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321 код <literal>AGAIN</literal>
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322 </tag-desc>
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323
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324 <tag-name><literal>s.ERROR</literal></tag-name>
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325 <tag-desc>
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326 код <literal>ERROR</literal>
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327 </tag-desc>
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328
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329 <tag-name><literal>s.ABORT</literal></tag-name>
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330 <tag-desc>
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331 код <literal>ABORT</literal>
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332 </tag-desc>
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333
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334 <tag-name><literal>s.log(<value>строка</value>)</literal></tag-name>
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335 <tag-desc>
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336 записывает отправленную <value>строку</value> в лог-файл ошибок
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337 на уровне лога <literal>info</literal>
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338 </tag-desc>
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339
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340 <tag-name><literal>s.warn(<value>строка</value>)</literal></tag-name>
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341 <tag-desc>
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342 записывает отправленную <literal>строку</literal> в лог-файл ошибок
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343 на уровне лога <literal>warning</literal> (0.2.0)
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344 </tag-desc>
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345
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346 <tag-name><literal>s.error(<value>строка</value>)</literal></tag-name>
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347 <tag-desc>
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348 записывает отправленную <literal>строку</literal> в лог-файл ошибок
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349 на уровне лога <literal>error</literal> (0.2.0)
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350 </tag-desc>
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351
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352 </list>
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353 </para>
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354
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355 </section>
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356
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357 </section>
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358
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359
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360 </article>
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361