[Backport 7.x] Added proxy support (#1276)

Co-authored-by: Tomas Della Vedova <delvedor@users.noreply.github.com>

test/acceptance/proxy.test.js

@@ -0,0 +1,149 @@
+'use strict'
+
+// We are using self-signed certificates
+process.env.NODE_TLS_REJECT_UNAUTHORIZED = 0
+
+const { test } = require('tap')
+const { Client } = require('../../index')
+const {
+  buildProxy: {
+    createProxy,
+    createSecureProxy,
+    createServer,
+    createSecureServer
+  }
+} = require('../utils')
+
+test('http-http proxy support', async t => {
+  const server = await createServer()
+  const proxy = await createProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  const client = new Client({
+    node: `http://${server.address().address}:${server.address().port}`,
+    proxy: `http://${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})
+
+test('http-https proxy support', async t => {
+  const server = await createSecureServer()
+  const proxy = await createProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  const client = new Client({
+    node: `https://${server.address().address}:${server.address().port}`,
+    proxy: `http://${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})
+
+test('https-http proxy support', async t => {
+  const server = await createServer()
+  const proxy = await createSecureProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  const client = new Client({
+    node: `http://${server.address().address}:${server.address().port}`,
+    proxy: `https://${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})
+
+test('https-https proxy support', async t => {
+  const server = await createSecureServer()
+  const proxy = await createSecureProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  const client = new Client({
+    node: `https://${server.address().address}:${server.address().port}`,
+    proxy: `https://${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})
+
+test('http basic authentication', async t => {
+  const server = await createServer()
+  const proxy = await createProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  proxy.authenticate = function (req, fn) {
+    fn(null, req.headers['proxy-authorization'] === `Basic ${Buffer.from('hello:world').toString('base64')}`)
+  }
+
+  const client = new Client({
+    node: `http://${server.address().address}:${server.address().port}`,
+    proxy: `http://hello:world@${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})
+
+test('https basic authentication', async t => {
+  const server = await createSecureServer()
+  const proxy = await createProxy()
+  server.on('request', (req, res) => {
+    t.strictEqual(req.url, '/_cluster/health')
+    res.setHeader('content-type', 'application/json')
+    res.end(JSON.stringify({ hello: 'world' }))
+  })
+
+  proxy.authenticate = function (req, fn) {
+    fn(null, req.headers['proxy-authorization'] === `Basic ${Buffer.from('hello:world').toString('base64')}`)
+  }
+
+  const client = new Client({
+    node: `https://${server.address().address}:${server.address().port}`,
+    proxy: `http://hello:world@${proxy.address().address}:${proxy.address().port}`
+  })
+
+  const response = await client.cluster.health()
+  t.deepEqual(response.body, { hello: 'world' })
+
+  server.close()
+  proxy.close()
+})