nginx-site: xml/ru/docs/njs/examples.xml comparison

Added Example of promisified requests to njs.

author	Yaroslav Zhuravlev <yar@nginx.com>
date	Tue, 21 Jan 2020 16:37:54 +0000
parents	253641e268a8
children	ba9bfd064a61

comparison

equal deleted inserted replaced

-:9bf87153b1b3
+:b60e5be733cd
 <!DOCTYPE article SYSTEM "../../../../dtd/article.dtd">
 <article name="Примеры использования"
 link="/ru/docs/njs/examples.html"
 lang="ru"
-rev="7">
+rev="8">
 <section id="helloword" name="Hello World">
 <para>
 <path>nginx.conf</path>:
 </note>
 </para>
 </section>
+<section id="promisified_subrequest" name="Подзапрос с promise">
+<para>
+Пример работает начиная с версии
+<link doc="changes.xml" id="njs0.3.8">0.3.8</link>.
+<path>nginx.conf</path>:
+<example>
+js_include promisified_subrequest.js;
+location /start {
+js_content content;
+}
+location /auth {
+proxy_pass http://auth_backend;
+}
+location /backend {
+proxy_pass http://backend;
+}
+</example>
+</para>
+<para>
+<path>promisified_subrequest.js</path>:
+<example>
+function content(r) {
+r.subrequest(r, '/auth')
+.then(reply => JSON.parse(reply.responseBody))
+.then(response => {
+if (!response['token']) {
+throw new Error("token is not available");
+}
+return token;
+})
+.then(token => {
+r.subrequest('/backend', `token=${token}`)
+.then(reply => r.return(reply.status, reply.responseBody));
+})
+.catch(_ => r.return(500));
+}
+</example>
+</para>
+</section>
 </article>

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