From fe1f132be8b8cb81121daccf091a98dd0afcb447 Mon Sep 17 00:00:00 2001
From: Dan Castillo <dan.castillo@jasper.ai>
Date: Thu, 7 Nov 2024 05:47:54 -0500
Subject: [PATCH] docs: add example using proxy with fetch (#3800)

* docs: add example using proxy with fetch

* remove main function and use TLA
---
 docs/examples/proxy/fetch.mjs | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 docs/examples/proxy/fetch.mjs

diff --git a/docs/examples/proxy/fetch.mjs b/docs/examples/proxy/fetch.mjs
new file mode 100644
index 00000000000..56e37728a73
--- /dev/null
+++ b/docs/examples/proxy/fetch.mjs
@@ -0,0 +1,35 @@
+import * as http from 'node:http'
+import { once } from 'node:events'
+import { createProxy } from 'proxy'
+import { ProxyAgent } from '../../../index.js'
+
+const proxyServer = createProxy(http.createServer())
+const server = http.createServer((req, res) => {
+  res.writeHead(200, { 'Content-Type': 'text/plain' })
+  res.end('okay')
+})
+
+proxyServer.on('request', (req, res) => {
+  console.log(`Incoming request to ${req.url}`)
+})
+
+await once(proxyServer.listen(0), 'listening')
+await once(server.listen(0), 'listening')
+
+const { port: proxyPort } = proxyServer.address()
+const { port } = server.address()
+
+console.log(`Proxy listening on port ${proxyPort}`)
+console.log(`Server listening on port ${port}`)
+try {
+  // undici does a tunneling to the proxy server using CONNECT.
+  const agent = new ProxyAgent(`http://localhost:${proxyPort}`)
+  const response = await fetch(`http://localhost:${port}`, {
+    dispatcher: agent,
+    method: 'GET'
+  })
+  const data = await response.text()
+  console.log('Response data:', data)
+} catch (e) {
+  console.log(e)
+}