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Added article about TypeScript in njs.
author Yaroslav Zhuravlev <yar@nginx.com>
date Fri, 15 May 2020 16:22:43 +0100
parents 73d254c3376d
children 5b2764724e0d
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1 <?xml version="1.0"?>
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2
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3 <!--
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4 Copyright (C) Nginx, Inc.
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5 -->
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6
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7 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd">
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8
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9 <article name="njs scripting language"
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10 link="/en/docs/njs/index.html"
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11 lang="en"
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12 rev="29"
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13 toc="no">
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15 <section id="summary">
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16
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17 <para>
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18 njs is a subset of the JavaScript language that allows
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19 extending nginx functionality.
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20 njs is created in compliance with
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21 <link url="http://www.ecma-international.org/ecma-262/5.1/">ECMAScript 5.1</link>
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22 (strict mode) with some
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23 <link url="http://www.ecma-international.org/ecma-262/6.0/">ECMAScript 6</link>
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24 and later extensions.
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25 The compliance is still <link doc="compatibility.xml">evolving</link>.
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26 </para>
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27
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28 </section>
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31 <section id="links">
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33 <para>
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34 <list type="bullet">
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35
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36 <listitem>
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37 <link doc="install.xml"/>
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38 </listitem>
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40 <listitem>
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41 <link doc="changes.xml"/>
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42 </listitem>
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43
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44 <listitem>
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45 <link doc="reference.xml"/>
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46 </listitem>
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47
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48 <listitem>
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49 <link doc="examples.xml"/>
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50 </listitem>
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52 <listitem>
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53 <link doc="compatibility.xml"/>
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54 </listitem>
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56 <listitem>
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57 <link doc="cli.xml"/>
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58 </listitem>
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59
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60 </list>
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61 </para>
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62
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63 <para>
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64 <list type="bullet">
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65
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66 <listitem>
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67 <link doc="../http/ngx_http_js_module.xml">
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68 ngx_http_js_module</link>
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69 </listitem>
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71 <listitem>
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72 <link doc="../stream/ngx_stream_js_module.xml">
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73 ngx_stream_js_module</link>
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74 </listitem>
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75
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76 </list>
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77 </para>
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78
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79 <para>
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80 <list type="bullet">
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81
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82 <listitem>
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83 <link doc="typescript.xml"/>
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84 </listitem>
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85
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86 <listitem>
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87 <link doc="node_modules.xml"/>
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88 </listitem>
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89
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90 </list>
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91 </para>
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92
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93 </section>
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94
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95
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96 <section id="usecases" name="Use cases">
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97
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98 <para>
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99 <list type="bullet">
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100
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101 <listitem>
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102 Complex access control and security checks in njs
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103 before a request reaches an upstream server
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104 </listitem>
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105
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106 <listitem>
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107 Manipulating response headers
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108 </listitem>
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109
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110 <listitem>
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111 Writing flexible asynchronous content handlers and filters
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112 </listitem>
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113
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114 </list>
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115 See <link doc="examples.xml">examples</link> and
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116 <link url="https://www.nginx.com/blog/tag/nginx-javascript-module/">blog posts</link>
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117 for more njs use cases.
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118 </para>
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119
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120 </section>
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121
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122
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123 <section id="example" name="Basic HTTP Example">
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124
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125 <para>
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126 To use njs in nginx:
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127 <list type="bullet">
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128
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129 <listitem>
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130 <para>
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131 <link doc="install.xml">install</link> njs scripting language
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132 </para>
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133 </listitem>
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134
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135 <listitem id="hello_world">
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136 <para>
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137 create an njs script file, for example, <path>hello_world.js</path>.
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138 See <link doc="reference.xml">Reference</link>
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139 for the list of njs properties and methods.
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140 <example>
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141 function hello(r) {
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142 r.return(200, "Hello world!");
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143 }
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144 </example>
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145 </para>
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146 </listitem>
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147
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148 <listitem>
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149
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150 <para>
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151 in the <path>nginx.conf</path> file, enable
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152 <link doc="../http/ngx_http_js_module.xml">ngx_http_js_module</link> module
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153 and specify the
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154 <link doc="../http/ngx_http_js_module.xml" id="js_include">js_include</link>
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155 directive
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156 with the <path>hello_world.js</path> script file:
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157 <example>
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158 load_module modules/ngx_http_js_module.so;
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159
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160 events {}
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161
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162 http {
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163 js_include hello_world.js;
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164
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165 server {
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166 listen 8000;
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167
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168 location / {
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169 js_content hello;
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170 }
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171 }
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172 }
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173
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174 </example>
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175 </para>
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176 </listitem>
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177
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178 </list>
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179 There is also a standalone <link doc="cli.xml">command line</link> utility
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180 that can be used independently of nginx for njs development and debugging.
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181 </para>
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182
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183 </section>
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184
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185
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186 <section id="presentation" name="Presentation at nginx.conf 2018">
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187
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188 <para><video id="Jc_L6UffFOs" /></para>
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189
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190 </section>
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191
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192 </article>