mirror of
https://github.com/weaveworks/scope.git
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113 lines
2.6 KiB
JavaScript
113 lines
2.6 KiB
JavaScript
/* eslint no-console: 0 */
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const express = require('express');
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const http = require('http');
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const httpProxy = require('http-proxy');
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const HttpProxyRules = require('http-proxy-rules');
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const app = express();
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const BACKEND_HOST = process.env.BACKEND_HOST || 'localhost';
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/*
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*
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* Proxy requests to:
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* - /api -> :4040/api
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*
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*/
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const backendProxy = httpProxy.createProxy({
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target: `http://${BACKEND_HOST}:4040`,
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ws: true,
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});
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backendProxy.on('error', err => console.error('Proxy error', err));
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app.all('/api*', backendProxy.web.bind(backendProxy));
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/*
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*
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* Production env serves precompiled content from build/
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*
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*/
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if (process.env.NODE_ENV === 'production') {
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app.use(express.static('build'));
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}
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/*
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*
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* Webpack Dev Middleware with Hot Reload
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*
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* See: https://github.com/webpack/webpack-dev-middleware;
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* https://github.com/glenjamin/webpack-hot-middleware
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*
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*/
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if (process.env.NODE_ENV !== 'production') {
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const webpack = require('webpack');
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const webpackMiddleware = require('webpack-dev-middleware');
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const webpackHotMiddleware = require('webpack-hot-middleware');
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const config = require('./webpack.local.config');
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const compiler = webpack(config);
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app.use(webpackMiddleware(compiler, {
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noInfo: true,
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publicPath: config.output.publicPath, // required
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stats: 'errors-only',
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}));
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app.use(webpackHotMiddleware(compiler));
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}
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/*
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*
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* Express server
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*
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*/
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const port = process.env.PORT || 4042;
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const server = app.listen(port, 'localhost', () => {
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const host = server.address().address;
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console.log('Scope UI listening at http://%s:%s', host, port);
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});
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server.on('upgrade', backendProxy.ws.bind(backendProxy));
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/*
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*
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* Path proxy server
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*
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*/
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const proxyRules = new HttpProxyRules({
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rules: {
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'/scoped/': `http://localhost:${port}`,
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}
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});
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const pathProxy = httpProxy.createProxy({ws: true});
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pathProxy.on('error', err => console.error('path proxy error', err));
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const pathProxyPort = port + 1;
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const proxyPathServer = http.createServer((req, res) => {
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const target = proxyRules.match(req);
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if (!target) {
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res.writeHead(500, {'Content-Type': 'text/plain'});
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return res.end('No rules matched! Check out /scoped/');
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}
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return pathProxy.web(req, res, {target});
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}).listen(pathProxyPort, 'localhost', () => {
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const pathProxyHost = proxyPathServer.address().address;
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console.log(
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'Scope Proxy Path UI listening at http://%s:%s/scoped/',
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pathProxyHost, pathProxyPort
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);
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});
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proxyPathServer.on('upgrade', (req, socket, head) => {
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const target = proxyRules.match(req);
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if (target) {
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pathProxy.ws(req, socket, head, {target});
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}
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});
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