Socket Hangup error Http-Proxy NodeJS - node.js

Question

I am getting following error in my server console when user click signout button.
Error: socket hang up
at createHangUpError (http.js:1472:15)
at Socket.socketCloseListener (http.js:1522:23)
at Socket.EventEmitter.emit (events.js:95:17)
at TCP.close (net.js:466:12)
Here is my proxy_server:
var fs=require('fs');
var options = {
key: fs.readFileSync('key/xxxxxxxxx.pem'),
cert: fs.readFileSync('key/xxxxx.pem'),
ca: fs.readFileSync('key/gd_bundle-g2-g1.crt')
};
var express=require('express'),
https=require('https'),
httpProxy = require('http-proxy'),
http=require('http'),
app=express(),
app1=express(),
server=https.createServer(options,app),
serverhttp=http.createServer(app1);
var proxy = httpProxy.createProxy({ target: 'http://localhost:9898',secureOptions:'constants.SSL_OP_NO_TLSv1_2'});
var proxySig = httpProxy.createProxy({target:'http://localhost:8881',secureOptions:'constants.SSL_OP_NO_TLSv1_2'});
var callSig = httpProxy.createProxy({target:'http://localhost:6666',secureOptions:'constants.SSL_OP_NO_TLSv1_2'});
var proxyCdn = httpProxy.createProxy({target:'http://localhost:3030',secureOptions:'constants.SSL_OP_NO_TLSv1_2'});
// var proxyhttps= new httpProxy.createProxy({ target: 'https://localhost:443',secure:false});
var errorhandler = require('errorhandler');
app.all('*', function(req,res){
if(req.hostname=='xxxxxxxx.in')
{
proxy.web(req, res);
}
else if(req.hostname=='xxxx.in')
{
proxyCdn.web(req, res);
}
else if(req.hostname=='xxxxxx.in')
{
proxySig.web(req, res);
}
else if(req.hostname=='xxxxx.in')
{
callSig.web(req, res);
}
});
app1.all('*', function(req,res){
res.redirect('https://'+req.hostname);;
});
serverhttp.listen(80);
server.listen(443);

Answer 1

You need to handle errors on each of your httpProxy objects. For example:
proxy.on('error', function (error, req, res) {
var json;
console.log('proxy error', error);
if (!res.headersSent) {
res.writeHead(500, { 'content-type': 'application/json' });
}
json = { error: 'proxy_error', reason: error.message };
res.end(JSON.stringify(json));
});
This thread was useful to me: https://github.com/nodejitsu/node-http-proxy/issues/527

Answer 2

Add changeOrigin: true, to the options when you set up the proxy. It changes the origin of the host header. When the proxy is "name based" /not an ip/, its a requirement.
Short summary:
Technical prerequisite needed for name-based virtual hosts is a web browser with HTTP/1.1 support (commonplace today) to include the target hostname in the request