Mercurial > hg > nginx-site
annotate xml/en/docs/http/ngx_http_js_module.xml @ 1844:f56626ce9c40
Changed JavaScript to nginScript.
author | Yaroslav Zhuravlev <yar@nginx.com> |
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date | Thu, 01 Dec 2016 14:41:04 +0300 |
parents | 15632fc2d548 |
children | bfac366fa1e4 |
rev | line source |
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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="Module ngx_http_js_module" |
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10 link="/en/docs/http/ngx_http_js_module.html" |
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11 lang="en" |
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12 rev="2"> |
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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 The <literal>ngx_http_js_module</literal> module is used to implement |
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18 location and variable handlers |
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19 in nginScript — |
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20 a subset of the JavaScript language. |
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21 </para> |
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22 |
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23 <para> |
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24 This module is not built by default, it should be compiled with |
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25 the nginScript module using the |
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26 <literal>--add_module</literal> configuration parameter: |
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27 <example> |
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28 ./configure --add-module=<value>path-to-njs</value>/nginx |
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29 </example> |
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30 The <link url="http://hg.nginx.org/njs">repository</link> |
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31 with the nginScript module can be cloned with the following command |
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32 (requires <link url="https://www.mercurial-scm.org">Mercurial</link> client): |
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33 <example> |
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34 hg clone http://hg.nginx.org/njs |
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35 </example> |
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36 This module can also be built as |
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37 <link doc="../ngx_core_module.xml" id="load_module">dynamic</link>: |
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38 <example> |
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39 ./configure --add-dynamic_module=<value>path-to-njs</value>/nginx |
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40 </example> |
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41 </para> |
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42 |
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43 </section> |
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44 |
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45 |
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46 <section id="issues" name="Known Issues"> |
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47 |
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48 <para> |
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49 The module is experimental, caveat emptor applies. |
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50 </para> |
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51 |
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52 </section> |
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53 |
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54 |
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55 <section id="example" name="Example Configuration"> |
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56 |
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57 <para> |
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58 <example> |
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59 js_include http.js; |
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60 |
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61 server { |
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62 listen 8000; |
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63 |
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64 location / { |
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65 js_set $foo foo; |
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66 add_header X-Foo $foo; |
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67 js_content baz; |
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68 } |
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69 |
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70 location /summary { |
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71 js_set $summary summary; |
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72 return 200 $summary; |
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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 The <path>http.js</path> file: |
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80 <example> |
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81 function foo(req, res) { |
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82 req.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(req, res) { |
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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: " + req.method + "\n"; |
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92 s += "HTTP version: " + req.httpVersion + "\n"; |
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93 s += "Host: " + req.headers.host + "\n"; |
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94 s += "Remote Address: " + req.remoteAddress + "\n"; |
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95 s += "URI: " + req.uri + "\n"; |
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96 |
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97 s += "Headers:\n"; |
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98 for (h in req.headers) { |
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99 s += " header '" + h + "' is '" + req.headers[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 req.args) { |
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104 s += " arg '" + a + "' is '" + req.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(req, res) { |
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111 res.headers.foo = 1234; |
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112 res.status = 200; |
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113 res.contentType = "text/plain; charset=utf-8"; |
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114 res.contentLength = 15; |
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115 res.sendHeader(); |
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116 res.send("nginx"); |
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117 res.send("java"); |
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118 res.send("script"); |
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119 |
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120 res.finish(); |
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121 } |
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122 </example> |
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123 </para> |
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124 |
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125 </section> |
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126 |
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127 |
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128 <section id="directives" name="Directives"> |
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129 |
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130 <directive name="js_include"> |
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131 <syntax><value>file</value></syntax> |
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132 <default/> |
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133 <context>http</context> |
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134 <context>server</context> |
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135 <context>location</context> |
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136 |
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137 <para> |
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138 Specifies a file that implements location and variable handlers in nginScript. |
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139 </para> |
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140 |
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141 </directive> |
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142 |
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143 |
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144 <directive name="js_content"> |
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145 <syntax><value>function</value></syntax> |
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146 <default/> |
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147 <context>location</context> |
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148 <context>limit_except</context> |
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149 |
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150 <para> |
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151 Sets an nginScript function as a location content handler. |
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152 </para> |
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153 |
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154 </directive> |
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155 |
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156 |
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157 <directive name="js_set"> |
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158 <syntax> |
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159 <value>$variable</value> <value>function</value></syntax> |
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160 <default/> |
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161 <context>http</context> |
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162 <context>server</context> |
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163 <context>location</context> |
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164 |
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165 <para> |
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166 Sets an nginScript function for the specified variable. |
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167 </para> |
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168 |
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169 </directive> |
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170 |
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171 </section> |
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172 |
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173 |
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174 <section id="arguments" name="Request and Response Arguments"> |
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175 <para> |
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176 Each HTTP nginScript handler receives two arguments, request and response. |
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177 </para> |
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178 |
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179 <para> |
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180 The request object has the following properties: |
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181 <list type="tag"> |
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182 |
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183 <tag-name><literal>uri</literal></tag-name> |
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184 <tag-desc> |
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185 current URI in a request, read-only |
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186 </tag-desc> |
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187 |
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188 <tag-name><literal>method</literal></tag-name> |
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189 <tag-desc> |
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190 request method, read-only |
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191 </tag-desc> |
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192 |
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193 <tag-name><literal>httpVersion</literal></tag-name> |
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194 <tag-desc> |
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195 HTTP version, read-only |
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196 </tag-desc> |
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197 |
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198 <tag-name><literal>remoteAddress</literal></tag-name> |
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199 <tag-desc> |
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200 client address, read-only |
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201 </tag-desc> |
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202 |
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203 <tag-name><literal>headers{}</literal></tag-name> |
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204 <tag-desc> |
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205 request headers object, read-only. |
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206 <para> |
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207 For example, the <literal>Header-Name</literal> header |
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208 can be accessed with the syntax <literal>headers['Header-Name']</literal> |
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209 or <literal>headers.Header_name</literal> |
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210 </para> |
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211 </tag-desc> |
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212 |
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213 <tag-name><literal>args{}</literal></tag-name> |
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214 <tag-desc> |
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215 request arguments object, read-only |
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216 </tag-desc> |
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217 |
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218 <tag-name><literal>variables{}</literal></tag-name> |
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219 <tag-desc> |
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220 nginx variables object, read-only |
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221 </tag-desc> |
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222 |
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223 <tag-name><literal>log(<value>string</value>)</literal></tag-name> |
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224 <tag-desc> |
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225 writes a <literal>string</literal> to the error log |
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226 </tag-desc> |
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227 </list> |
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228 </para> |
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229 |
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230 <para> |
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231 The response object has the following properties: |
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232 <list type="tag"> |
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233 |
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234 <tag-name><literal>status</literal></tag-name> |
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235 <tag-desc> |
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236 response status, writable |
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237 </tag-desc> |
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238 |
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239 <tag-name><literal>headers{}</literal></tag-name> |
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240 <tag-desc> |
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241 response headers object |
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242 </tag-desc> |
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243 |
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244 <tag-name><literal>contentType</literal></tag-name> |
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245 <tag-desc> |
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246 the response <header>Content-Type</header> header field value, writable |
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247 </tag-desc> |
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248 |
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249 <tag-name><literal>contentLength</literal></tag-name> |
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250 <tag-desc> |
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251 the response <header>Content-Length</header> header field value, writable |
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252 </tag-desc> |
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253 </list> |
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254 </para> |
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255 |
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256 <para> |
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257 The response object has the following methods: |
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258 <list type="tag"> |
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259 |
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260 <tag-name><literal>sendHeader()</literal></tag-name> |
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261 <tag-desc> |
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262 sends the HTTP header to the client |
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263 </tag-desc> |
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264 |
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265 <tag-name><literal>send(<value>string</value>)</literal></tag-name> |
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266 <tag-desc> |
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267 sends a part of the response body to the client |
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268 </tag-desc> |
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269 |
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270 <tag-name><literal>finish()</literal></tag-name> |
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271 <tag-desc> |
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272 finishes sending a response to the client |
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273 </tag-desc> |
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274 </list> |
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275 </para> |
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276 |
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277 </section> |
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278 |
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279 </module> |