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server.js
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server.js
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"use strict";
let express = require('express'),
compression = require('compression'),
proxy = require('express-http-proxy'),
http = require('http'),
url = require('url'),
serveStatic = require('serve-static'),
fs = require('fs'),
path = require('path'),
app = express(),
config = require('./config'),
mock = require('./json-server/mock-redirect');
//use mocks where appropriate, then fall back to real thing if mocks aren't there
if (config.enableMocks) mock(app);
//proxy /api locally to the designated endpoint that should be passed in as an environment variable
if (config.enableProxy) {
//app.enable('trust proxy');
app.use('/api', proxy(config.proxyDomain, {
//preserveHostHdr: true,
//reqBodyEncoding: 'UTF-8',
//timeout: 10000,
decorateRequest: (proxyReq, originalReq) => {
//FIXME: if we allow gzip compress, IIS in Azure sitting in front of Node is blowing up on a 502
//I think this needs a fix to web.config to handle this, may need a web.config here to override
delete proxyReq.headers['accept-encoding'];
return proxyReq;
},
intercept: (rsp, data, req, res, callback) => {
if (res._headers['set-cookie']) {
//fix any set cookie headers specific to the proxied domain back to the local domain
let localDomain = req.headers.host.substr(0, req.headers.host.indexOf(':') || req.headers.length);
res._headers['set-cookie'] = JSON.parse(JSON.stringify(res._headers['set-cookie']).replace(config.proxyDomain, localDomain));
}
if (res._headers['location']) {
res.location('/' + res._headers['location']);
res.end();
return;
}
try {
callback(null, data);
}
catch(e) {
console.log(e);
}
},
forwardPath: (req) => {
//forward to proxy with same url including the prefix
return `/api${url.parse(req.url).path}`;
}
}));
}
app.set('port', config.hostPort);
app.use(compression());
//primary - resolve from statically compiled files
app.use(serveStatic('dist'));
//secondary - resolve from dynamically compiled files on-demand
try {
let webpack = require('webpack'),
webpackConfig = require('./webpack.config'),
webpackHot = require('webpack-hot-middleware'),
webpackMiddleware = require('webpack-dev-middleware'),
compiler = webpack(webpackConfig);
app.use(webpackMiddleware(compiler, {
noInfo: true,
publicPath: webpackConfig.output.publicPath,
stats: {
colors: true
}
}));
app.use(webpackHot(compiler));
}
catch(e) {
console.log('webpack development tools for on-demand compilation disabled');
}
//fallback - resolve from raw source files
app.use(serveStatic('public'));
//404 resolution back to index.html for html5 push state
let request = require('request');
app.get('*', (req, res, next) => {
if (req.method === 'GET' && req.headers.accept.includes('html')) {
req.pipe(request(`${req.protocol}://${req.get('host')}/`)).pipe(res);
}
else {
next();
}
});
let server = http.createServer(app);
server.listen(app.get('port'), () => {
console.log(`Server running on port ${app.get('port')}`);
});