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annotate xml/en/docs/http/ngx_http_js_module.xml @ 2901:9719a0184a67

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Documented the js_preload_object directive.
author Yaroslav Zhuravlev <yar@nginx.com>
date Fri, 21 Oct 2022 12:19:07 +0100
parents 986e1f930e3b
children 7e83ebfac8ca
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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="37">
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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 <link doc="../njs/index.xml">njs</link> —
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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 Download and install instructions are available
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25 <link doc="../njs/install.xml">here</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="Example Configuration">
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32
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33 <para>
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34 The example works since
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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 # since 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 # since 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 The <path>http.js</path> file:
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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 // since 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 // since 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="Directives">
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149
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150 <directive name="js_body_filter">
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151 <syntax><value>function</value> | <value>module.function</value>
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152 [<value>buffer_type</value>=<value>string</value> | <value>buffer</value>]</syntax>
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153 <default/>
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154 <context>location</context>
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155 <context>if in location</context>
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156 <context>limit_except</context>
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157 <appeared-in>0.5.2</appeared-in>
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158
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159 <para>
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160 Sets an njs function as a response body filter.
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161 The filter function is called for each data chunk of a response body
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162 with the following arguments:
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163
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164 <list type="tag">
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165 <tag-name><literal>r</literal></tag-name>
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166 <tag-desc>
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167 the <link doc="../njs/reference.xml" id="http">HTTP request</link> object
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168 </tag-desc>
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169
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170 <tag-name><literal>data</literal></tag-name>
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171 <tag-desc>
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172 the incoming data chunk,
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173 may be a string or Buffer
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174 depending on the <literal>buffer_type</literal> value,
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175 by default is a string.
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176 </tag-desc>
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177
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178 <tag-name><literal>flags</literal></tag-name>
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179 <tag-desc>
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180 an object with the following properties:
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181 <list type="tag">
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182 <tag-name><literal>last</literal></tag-name>
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183 <tag-desc>
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184 a boolean value, true if data is a last buffer.
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185 </tag-desc>
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186
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187 </list>
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188 </tag-desc>
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189
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190 </list>
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191 </para>
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192
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193 <para>
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194 The filter function can pass its own modified version
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195 of the input data chunk to the next body filter by calling
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196 <link doc="../njs/reference.xml" id="r_sendbuffer"><literal>r.sendBuffer()</literal></link>.
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197 For example, to transform all the lowercase letters in the response body:
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198 <example>
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199 function filter(r, data, flags) {
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200 r.sendBuffer(data.toLowerCase(), flags);
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201 }
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202 </example>
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203 To stop filtering (following data chunks will be passed to client
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204 without calling <literal>js_body_filter</literal>),
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205 <link doc="../njs/reference.xml" id="r_done"><literal>r.done()</literal></link>
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206 can be used.
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207 </para>
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208
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209 <para>
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210 If the filter function changes the length of the response body, then
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211 it is required to clear out the <header>Content-Length</header> response header
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212 (if any) in
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213 <link id="js_header_filter"><literal>js_header_filter</literal></link>
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214 to enforce chunked transfer encoding.
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215 </para>
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216
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217 <para>
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218 <note>
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219 As the <literal>js_body_filter</literal> handler
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220 returns its result immediately, it supports
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221 only synchronous operations.
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222 Thus, asynchronous operations such as
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223 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link>
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224 or
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225 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>
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226 are not supported.
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227 </note>
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228 </para>
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229
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230 <para>
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231 <note>
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232 The directive can be specified inside the
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233 <link doc="../http/ngx_http_rewrite_module.xml" id="if">if</link> block
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234 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
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235 </note>
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236 </para>
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237
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238 </directive>
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239
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240
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241 <directive name="js_content">
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242 <syntax><value>function</value> | <value>module.function</value></syntax>
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243 <default/>
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244 <context>location</context>
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245 <context>if in location</context>
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246 <context>limit_except</context>
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247
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248 <para>
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249 Sets an njs function as a location content handler.
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250 Since <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link>,
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251 a module function can be referenced.
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252 </para>
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253
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254 <para>
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255 <note>
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256 The directive can be specified inside the
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257 <link doc="../http/ngx_http_rewrite_module.xml" id="if">if</link> block
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258 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
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259 </note>
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260 </para>
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261
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262 </directive>
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263
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264
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265 <directive name="js_fetch_buffer_size">
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266 <syntax><value>size</value></syntax>
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267 <default>16k</default>
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268 <context>http</context>
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269 <context>server</context>
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270 <context>location</context>
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271 <appeared-in>0.7.4</appeared-in>
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272
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273 <para>
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274 Sets the <value>size</value> of the buffer used for reading and writing
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275 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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276 </para>
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277
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278 </directive>
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279
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280
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281 <directive name="js_fetch_ciphers">
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282 <syntax><value>ciphers</value></syntax>
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283 <default>HIGH:!aNULL:!MD5</default>
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284 <context>http</context>
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285 <context>server</context>
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286 <context>location</context>
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287 <appeared-in>0.7.0</appeared-in>
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288
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289 <para>
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290 Specifies the enabled ciphers for HTTPS requests
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291 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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292 The ciphers are specified in the format understood by the
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293 OpenSSL library.
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294 </para>
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295
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296 <para>
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297 The full list can be viewed using the
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298 “<command>openssl ciphers</command>” command.
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299 </para>
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300
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301 </directive>
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302
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303
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304 <directive name="js_fetch_max_response_buffer_size">
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305 <syntax><value>size</value></syntax>
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306 <default>1m</default>
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307 <context>http</context>
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308 <context>server</context>
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309 <context>location</context>
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310 <appeared-in>0.7.4</appeared-in>
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311
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312 <para>
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313 Sets the maximum <value>size</value> of the response received
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314 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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315 </para>
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316
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317 </directive>
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318
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319
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320 <directive name="js_fetch_protocols">
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321 <syntax>
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322 [<literal>TLSv1</literal>]
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323 [<literal>TLSv1.1</literal>]
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324 [<literal>TLSv1.2</literal>]
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325 [<literal>TLSv1.3</literal>]</syntax>
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326 <default>TLSv1 TLSv1.1 TLSv1.2</default>
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327 <context>http</context>
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328 <context>server</context>
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329 <context>location</context>
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330 <appeared-in>0.7.0</appeared-in>
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331
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332 <para>
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333 Enables the specified protocols for HTTPS requests
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334 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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335 </para>
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336
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337 </directive>
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338
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339
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340 <directive name="js_fetch_timeout">
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341 <syntax><value>time</value></syntax>
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342 <default>60s</default>
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343 <context>http</context>
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344 <context>server</context>
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345 <context>location</context>
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346 <appeared-in>0.7.4</appeared-in>
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347
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348 <para>
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349 Defines a timeout for reading and writing
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350 for <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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351 The timeout is set only between two successive read/write operations,
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352 not for the whole response.
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353 If no data is transmitted within this time, the connection is closed.
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354 </para>
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355
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356 </directive>
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357
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358
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359 <directive name="js_fetch_trusted_certificate">
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360 <syntax><value>file</value></syntax>
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361 <default/>
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362 <context>http</context>
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363 <context>server</context>
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364 <context>location</context>
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365 <appeared-in>0.7.0</appeared-in>
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366
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367 <para>
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368 Specifies a <value>file</value> with trusted CA certificates in the PEM format
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369 used to
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370 <link doc="../njs/reference.xml" id="fetch_verify">verify</link>
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371 the HTTPS certificate
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372 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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373 </para>
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374
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375 </directive>
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376
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377
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378 <directive name="js_fetch_verify">
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379 <syntax><literal>on</literal> | <literal>off</literal></syntax>
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380 <default>on</default>
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381 <context>http</context>
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382 <context>server</context>
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383 <context>location</context>
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384 <appeared-in>0.7.4</appeared-in>
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385
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386 <para>
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387 Enables or disables verification of the HTTPS server certificate
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388 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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389 </para>
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390
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391 </directive>
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392
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393
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394 <directive name="js_fetch_verify_depth">
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395 <syntax><value>number</value></syntax>
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396 <default>100</default>
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397 <context>http</context>
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398 <context>server</context>
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399 <context>location</context>
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400 <appeared-in>0.7.0</appeared-in>
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401
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diff changeset
402 <para>
a2852750c379 Added fetch directives to js http and stream modules.
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403 Sets the verification depth in the HTTPS server certificates chain
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diff changeset
404 with <link doc="../njs/reference.xml" id="ngx_fetch">Fetch API</link>.
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diff changeset
405 </para>
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diff changeset
406
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diff changeset
407 </directive>
a2852750c379 Added fetch directives to js http and stream modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2747
diff changeset
408
a2852750c379 Added fetch directives to js http and stream modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2747
diff changeset
409
2651
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
410 <directive name="js_header_filter">
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
411 <syntax><value>function</value> | <value>module.function</value></syntax>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
412 <default/>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
413 <context>location</context>
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
414 <context>if in location</context>
2651
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
415 <context>limit_except</context>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
416 <appeared-in>0.5.1</appeared-in>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
417
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
418 <para>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
419 Sets an njs function as a response header filter.
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
420 The directive allows changing arbitrary header fields of a response header.
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
421 </para>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
422
2787
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
423 <para>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
424 <note>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
425 As the <literal>js_header_filter</literal> handler
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
426 returns its result immediately, it supports
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
427 only synchronous operations.
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
428 Thus, asynchronous operations such as
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
429 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
430 or
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
431 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
432 are not supported.
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
433 </note>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
434 </para>
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
435
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
436 <para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
437 <note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
438 The directive can be specified inside the
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
439 <link doc="../http/ngx_http_rewrite_module.xml" id="if">if</link> block
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
440 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
441 </note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
442 </para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
443
2651
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
444 </directive>
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
445
b4991bbd64ee Documented the js_header_filter directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2534
diff changeset
446
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
447 <directive name="js_import">
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
448 <syntax><value>module.js</value> |
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
449 <value>export_name from module.js</value></syntax>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
450 <default/>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
451 <context>http</context>
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
452 <context>server</context>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
453 <context>location</context>
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
454 <appeared-in>0.4.0</appeared-in>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
455
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
456 <para>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
457 Imports a module that implements location and variable handlers in njs.
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
458 The <literal>export_name</literal> is used as a namespace
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
459 to access module functions.
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
460 If the <literal>export_name</literal> is not specified,
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
461 the module name will be used as a namespace.
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
462 <example>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
463 js_import http.js;
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
464 </example>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
465 Here, the module name <literal>http</literal> is used as a namespace
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
466 while accessing exports.
2680
8751cab1d562 Corrected example description in js_import.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2675
diff changeset
467 If the imported module exports <literal>foo()</literal>,
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
468 <literal>http.foo</literal> is used to refer to it.
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
469 </para>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
470
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
471 <para>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
472 Several <literal>js_import</literal> directives can be specified.
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
473 </para>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
474
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
475 <para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
476 <note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
477 The directive can be specified on the
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
478 <literal>server</literal> and <literal>location</literal> level
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
479 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
480 </note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
481 </para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
482
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
483 </directive>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
484
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
485
2142
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
486 <directive name="js_include">
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
487 <syntax><value>file</value></syntax>
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
488 <default/>
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
489 <context>http</context>
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
490
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
491 <para>
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
492 Specifies a file that implements location and variable handlers in njs:
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
493 <example>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
494 nginx.conf:
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
495 js_include http.js;
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
496 location /version {
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
497 js_content version;
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
498 }
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
499
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
500 http.js:
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
501 function version(r) {
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
502 r.return(200, njs.version);
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
503 }
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
504 </example>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
505 </para>
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
506
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
507 <para>
2823
652356b39f0f Added info about removal of the js_import directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2787
diff changeset
508 The directive was made obsolete in version
652356b39f0f Added info about removal of the js_import directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2787
diff changeset
509 <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link>
652356b39f0f Added info about removal of the js_import directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2787
diff changeset
510 and was removed in version
652356b39f0f Added info about removal of the js_import directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2787
diff changeset
511 <link doc="../njs/changes.xml" id="njs0.7.1">0.7.1</link>.
652356b39f0f Added info about removal of the js_import directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2787
diff changeset
512 The <link id="js_import"/> directive should be used instead.
2142
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
513 </para>
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
514
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
515 </directive>
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
516
ca7568f67dee Sorted directives alphabetically.
Ruslan Ermilov <ru@nginx.com>
parents: 2135
diff changeset
517
2352
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
518 <directive name="js_path">
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
519 <syntax>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
520 <value>path</value></syntax>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
521 <default/>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
522 <context>http</context>
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
523 <context>server</context>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
524 <context>location</context>
2352
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
525 <appeared-in>0.3.0</appeared-in>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
526
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
527 <para>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
528 Sets an additional path for njs modules.
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
529 </para>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
530
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
531 <para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
532 <note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
533 The directive can be specified on the
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
534 <literal>server</literal> and <literal>location</literal> level
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
535 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
536 </note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
537 </para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
538
2352
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
539 </directive>
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
540
1101e24c6d14 Documented the js_path directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2246
diff changeset
541
2901
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
542 <directive name="js_preload_object">
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
543 <syntax><value>name.json</value> |
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
544 <value>name</value> from <value>file.json</value></syntax>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
545 <default/>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
546 <context>http</context>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
547 <context>server</context>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
548 <context>location</context>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
549 <appeared-in>0.7.8</appeared-in>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
550
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
551 <para>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
552 Preloads an immutable object at configure time.
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
553 The <literal>name</literal> is used a name of the global variable
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
554 though which the object is available in njs code.
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
555 If the <literal>name</literal> is not specified,
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
556 the file name will be used instead.
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
557 <example>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
558 js_preload_object map.json;
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
559 </example>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
560 Here, the <literal>map</literal> is used as a name
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
561 while accessing the preloaded object.
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
562 </para>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
563
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
564 <para>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
565 Several <literal>js_preload_object</literal> directives can be specified.
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
566 </para>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
567
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
568 </directive>
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
569
9719a0184a67 Documented the js_preload_object directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2882
diff changeset
570
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
571 <directive name="js_set">
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
572 <syntax>
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
573 <value>$variable</value> <value>function</value> |
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
574 <value>module.function</value></syntax>
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
575 <default/>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
576 <context>http</context>
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
577 <context>server</context>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
578 <context>location</context>
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
579
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
580 <para>
2686
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
581 Sets an njs <literal>function</literal>
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
582 for the specified <literal>variable</literal>.
2530
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
583 Since <link doc="../njs/changes.xml" id="njs0.4.0">0.4.0</link>,
407c5bd5bffc Documented the js_import directive and corresponding changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2352
diff changeset
584 a module function can be referenced.
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
585 </para>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
586
2686
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
587 <para>
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
588 The function is called when
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
589 the variable is referenced for the first time for a given request.
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
590 The exact moment depends on a
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
591 <link doc="../dev/development_guide.xml" id="http_phases">phase</link>
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
592 at which the variable is referenced.
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
593 This can be used to perform some logic
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
594 not related to variable evaluation.
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
595 For example, if the variable is referenced only in the
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
596 <link doc="ngx_http_log_module.xml" id="log_format"/> directive,
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
597 its handler will not be executed until the log phase.
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
598 This handler can be used to do some cleanup
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
599 right before the request is freed.
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
600 </para>
45214e5316cd Improved description of js_set.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2680
diff changeset
601
2747
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
602 <para>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
603 <note>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
604 As the <literal>js_set</literal> handler
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
605 returns its result immediately, it supports
2787
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
606 only synchronous operations.
005b056c267f Added note about async calls for js_body_filter, js_header_filter.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2784
diff changeset
607 Thus, asynchronous operations such as
2747
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
608 <link doc="../njs/reference.xml" id="r_subrequest">r.subrequest()</link>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
609 or
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
610 <link doc="../njs/reference.xml" id="settimeout">setTimeout()</link>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
611 are not supported.
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
612 </note>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
613 </para>
42fb92e582db Added note to js_set about asyncronous calls.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2693
diff changeset
614
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
615 <para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
616 <note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
617 The directive can be specified on the
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
618 <literal>server</literal> and <literal>location</literal> level
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
619 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
620 </note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
621 </para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
622
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
623 </directive>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
624
2693
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
625
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
626 <directive name="js_var">
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
627 <syntax><value>$variable</value> [<value>value</value>]</syntax>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
628 <default/>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
629 <context>http</context>
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
630 <context>server</context>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
631 <context>location</context>
2693
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
632 <appeared-in>0.5.3</appeared-in>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
633
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
634 <para>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
635 Declares
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
636 a <link doc="../njs/reference.xml" id="r_variables">writable</link>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
637 variable.
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
638 The value can contain text, variables, and their combination.
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
639 The variable is not overwritten after a redirect
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
640 unlike variables created with the
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
641 <link doc="ngx_http_rewrite_module.xml" id="set"/> directive.
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
642 </para>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
643
2882
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
644 <para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
645 <note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
646 The directive can be specified on the
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
647 <literal>server</literal> and <literal>location</literal> level
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
648 since <link doc="../njs/changes.xml" id="njs0.7.7">0.7.7</link>.
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
649 </note>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
650 </para>
986e1f930e3b Documented server, location, if contexts for some js directives.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2845
diff changeset
651
2693
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
652 </directive>
3cbd6e440581 Documented the js_var directive.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2686
diff changeset
653
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
654 </section>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
655
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
656
2187
ed905ab118c7 Updated HTTP njs module according to njs 0.2.2.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2175
diff changeset
657 <section id="arguments" name="Request Argument">
2149
6df1a86a60b8 Added new njs HTTP properties and methods.
Roman Arutyunyan <arut@nginx.com>
parents: 2142
diff changeset
658
6df1a86a60b8 Added new njs HTTP properties and methods.
Roman Arutyunyan <arut@nginx.com>
parents: 2142
diff changeset
659 <para>
2187
ed905ab118c7 Updated HTTP njs module according to njs 0.2.2.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2175
diff changeset
660 Each HTTP njs handler receives one argument, a request
2246
32ba43abf9cd Renamed njs API, njs Changes.
Yaroslav Zhuravlev <yar@nginx.com>
parents: 2245
diff changeset
661 <link doc="../njs/reference.xml" id="http">object</link>.
1840
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
662 </para>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
663
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
664 </section>
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
665
15632fc2d548 Documented http and stream nginScript modules.
Yaroslav Zhuravlev <yar@nginx.com>
parents:
diff changeset
666 </module>