Mercurial > hg > nginx-site
annotate xml/en/docs/njs/njs_api.xml @ 2175:cd4889fdcfa4
Moved njs HTTP and Stream API to a separate page.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Tue, 05 Jun 2018 18:22:00 +0300 |
parents | |
children | 95b406f1f347 |
rev | line source |
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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="/en/docs/njs/njs_api.html" |
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11 lang="en" |
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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> provides objects, methods and properties |
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18 for extending nginx functionality. |
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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 The <literal>HTTP</literal> objects are available only in the |
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28 <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link> module. |
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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="Request"> |
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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 current URI in a request, read-only |
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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 request method, read-only |
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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 HTTP version, read-only |
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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 client address, read-only |
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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 request headers object, read-only. |
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60 <para> |
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61 For example, the <literal>Header-Name</literal> header |
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62 can be accessed with the syntax <literal>headers['Header-Name']</literal> |
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63 or <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 request arguments object, read-only |
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70 </tag-desc> |
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71 |
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72 <tag-name><literal>request.variables{}</literal></tag-name> |
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73 <tag-desc> |
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74 nginx variables object, read-only |
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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 the <link id="http_response">response</link> object (0.2.0), read-only |
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80 </tag-desc> |
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81 |
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82 <tag-name><literal>req.log(<value>string</value>)</literal></tag-name> |
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83 <tag-desc> |
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84 writes a <literal>string</literal> to the error log |
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85 on the <literal>info</literal> level of logging |
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86 </tag-desc> |
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87 |
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88 <tag-name><literal>req.warn(<value>string</value>)</literal></tag-name> |
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89 <tag-desc> |
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90 writes a <literal>string</literal> to the error log |
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91 on the <literal>warning</literal> level of logging (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>string</value>)</literal></tag-name> |
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95 <tag-desc> |
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96 writes a <literal>string</literal> to the error log |
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97 on the <literal>error</literal> level of logging (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 creates a subrequest with the given <literal>uri</literal> and |
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104 <literal>options</literal>, and installs |
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105 an optional completion <literal>callback</literal> (0.2.0). |
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106 |
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107 <para> |
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108 If <literal>options</literal> is a string, then it |
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109 holds the subrequest arguments string. |
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110 Otherwise, <literal>options</literal> is expected to be |
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111 an object with the following keys: |
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112 |
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113 <list type="tag"> |
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114 <tag-name><literal>args</literal></tag-name> |
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115 <tag-desc> |
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116 arguments string |
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117 </tag-desc> |
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118 |
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119 <tag-name><literal>body</literal></tag-name> |
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120 <tag-desc> |
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121 request body |
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122 </tag-desc> |
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123 |
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124 <tag-name><literal>method</literal></tag-name> |
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125 <tag-desc> |
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126 HTTP method |
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127 </tag-desc> |
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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 The completion <literal>callback</literal> |
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133 receives a <link id="http_reply_object">reply</link> object. |
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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="Response"> |
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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 response status, writable |
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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 response headers object |
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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 the response <header>Content-Type</header> header field value, writable |
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161 </tag-desc> |
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162 |
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163 <tag-name><literal>res.contentLength</literal></tag-name> |
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164 <tag-desc> |
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165 the response <header>Content-Length</header> header field value, writable |
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166 </tag-desc> |
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167 |
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168 <tag-name><literal>res.sendHeader()</literal></tag-name> |
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169 <tag-desc> |
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170 sends the HTTP header to the client |
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171 </tag-desc> |
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172 |
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173 <tag-name><literal>res.send(<value>string</value>)</literal></tag-name> |
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174 <tag-desc> |
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175 sends a part of the response body to the client |
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176 </tag-desc> |
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177 |
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178 <tag-name><literal>res.finish()</literal></tag-name> |
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179 <tag-desc> |
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180 finishes sending a response to the client |
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181 </tag-desc> |
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182 |
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183 <tag-name><literal>res.return(status[, string])</literal></tag-name> |
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184 <tag-desc> |
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185 sends |
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186 the entire response with the specified <literal>status</literal> to the client |
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187 (0.2.0) |
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188 <para> |
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189 It is possible to specify either a redirect URL |
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190 (for codes 301, 302, 303, 307, and 308) |
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191 or the response body text (for other codes) as the second argument |
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192 </para> |
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193 </tag-desc> |
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194 |
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195 </list> |
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196 </para> |
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197 |
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198 </section> |
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199 |
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200 |
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201 <section id="http_reply" name="Reply"> |
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202 |
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203 <para> |
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204 <list type="tag"> |
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205 |
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206 <tag-name><literal>reply.uri</literal></tag-name> |
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207 <tag-desc> |
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208 current URI in a reply, read-only |
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209 </tag-desc> |
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210 |
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211 <tag-name><literal>reply.method</literal></tag-name> |
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212 <tag-desc> |
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213 reply method, read-only |
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214 </tag-desc> |
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215 |
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216 <tag-name><literal>reply.status</literal></tag-name> |
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217 <tag-desc> |
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218 reply status, writable |
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219 </tag-desc> |
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220 |
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221 <tag-name><literal>reply.contentType</literal></tag-name> |
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222 <tag-desc> |
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223 the response <header>Content-Type</header> header field value, writable |
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224 </tag-desc> |
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225 |
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226 <tag-name><literal>reply.contentLength</literal></tag-name> |
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227 <tag-desc> |
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228 the response <header>Content-Length</header> header field value, writable |
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229 </tag-desc> |
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230 |
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231 <tag-name><literal>reply.headers{}</literal></tag-name> |
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232 <tag-desc> |
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233 reply headers object, read-only |
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234 </tag-desc> |
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235 |
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236 </list> |
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237 </para> |
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238 |
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239 <para> |
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240 Additionally, the <literal>reply</literal> object has |
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241 the following properties: |
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242 |
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243 <list type="tag"> |
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244 |
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245 <tag-name><literal>reply.body</literal></tag-name> |
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246 <tag-desc> |
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247 holds the subrequest response body |
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248 </tag-desc> |
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249 |
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250 <tag-name><literal>reply.parent</literal></tag-name> |
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251 <tag-desc> |
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252 references the parent request object |
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253 </tag-desc> |
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254 |
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255 </list> |
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256 </para> |
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257 |
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258 </section> |
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259 |
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260 </section> |
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261 |
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262 |
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263 <section id="stream" name="Stream"> |
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264 |
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265 <para> |
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266 The <literal>stream</literal> objects are available only in the |
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267 <link doc="../stream/ngx_stream_js_module.xml">ngx_stream_js_module</link> |
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268 module. |
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269 </para> |
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270 |
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271 |
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272 <section id="stream_session" name="Session"> |
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273 |
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274 <para> |
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275 <list type="tag"> |
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276 |
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277 <tag-name><literal>s.remoteAddress</literal></tag-name> |
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278 <tag-desc> |
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279 client address, read-only |
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280 </tag-desc> |
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281 |
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282 <tag-name><literal>s.eof</literal></tag-name> |
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283 <tag-desc> |
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284 a boolean read-only property, true if the current buffer is the last buffer |
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285 </tag-desc> |
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286 |
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287 <tag-name><literal>s.fromUpstream</literal></tag-name> |
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288 <tag-desc> |
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289 a boolean read-only property, |
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290 true if the current buffer is from the upstream server to the client |
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291 </tag-desc> |
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292 |
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293 <tag-name><literal>s.buffer</literal></tag-name> |
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294 <tag-desc> |
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295 the current buffer, writable |
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296 </tag-desc> |
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297 |
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298 <tag-name><literal>s.variables{}</literal></tag-name> |
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299 <tag-desc> |
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300 nginx variables object, read-only |
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301 </tag-desc> |
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302 |
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303 <tag-name><literal>s.OK</literal></tag-name> |
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304 <tag-desc> |
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305 the <literal>OK</literal> return code |
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306 </tag-desc> |
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307 |
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308 <tag-name><literal>s.DECLINED</literal></tag-name> |
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309 <tag-desc> |
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310 the <literal>DECLINED</literal> return code |
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311 </tag-desc> |
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312 |
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313 <tag-name><literal>s.AGAIN</literal></tag-name> |
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314 <tag-desc> |
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315 the <literal>AGAIN</literal> return code |
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316 </tag-desc> |
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317 |
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318 <tag-name><literal>s.ERROR</literal></tag-name> |
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319 <tag-desc> |
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320 the <literal>ERROR</literal> return code |
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321 </tag-desc> |
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322 |
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323 <tag-name><literal>s.ABORT</literal></tag-name> |
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324 <tag-desc> |
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325 the <literal>ABORT</literal> return code |
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326 </tag-desc> |
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327 |
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328 <tag-name><literal>s.log(<value>string</value>)</literal></tag-name> |
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329 <tag-desc> |
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330 writes a sent <value>string</value> to the error log |
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331 on the <literal>info</literal> level of logging |
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332 </tag-desc> |
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333 |
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334 <tag-name><literal>s.warn(<value>string</value>)</literal></tag-name> |
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335 <tag-desc> |
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336 writes a sent <literal>string</literal> to the error log |
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337 on the <literal>warning</literal> level of logging (0.2.0) |
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338 </tag-desc> |
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339 |
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340 <tag-name><literal>s.error(<value>string</value>)</literal></tag-name> |
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341 <tag-desc> |
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342 writes a sent <literal>string</literal> to the error log |
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343 on the <literal>error</literal> level of logging (0.2.0) |
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344 </tag-desc> |
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345 |
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346 </list> |
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347 </para> |
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348 |
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349 </section> |
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350 |
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351 </section> |
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352 |
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353 |
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354 </article> |