Https proxy decode encoded data node js - node.js

Question

I am trying to setup a proxy for http and https. Here is my code,
const http = require('http');
var https = require('https');
const fs = require('fs');
var url = require('url');
var net = require('net');
const config = require('./config');
let proxify = function (req, res) {
var urlObj = url.parse(req.url);
var target = urlObj.protocol + '//' + urlObj.host;
if (!req.headers['x-target']) req.headers['x-target'] = target;
req.headers['x-proxy-username'] = config.username;
req.headers['x-proxy-password'] = config.password;
console.log(target);
console.log('Proxy HTTP request for:', target);
var proxy = httpProxy.createProxyServer({});
proxy.on('error', function (err, req, res) {
console.log('proxy error', err);
res.end();
});
proxy.web(req, res, { target: config.server, changeOrigin: true });
};
var httpserver = http.createServer(proxify).listen(2890); //this is the port your clients will connect to
const httpsserver = https
.createServer(
{
cert: fs.readFileSync('./ssl_cert/cert.pem'),
key: fs.readFileSync('./ssl_cert/key.pem'),
},
proxify
)
.listen(2891);
var regex_hostport = /^([^:]+)(:([0-9]+))?$/;
var getHostPortFromString = function (hostString, defaultPort) {
var host = hostString;
var port = defaultPort;
var result = regex_hostport.exec(hostString);
if (result != null) {
host = result[1];
if (result[2] != null) {
port = result[3];
}
}
return [host, port];
};
httpserver.addListener('connect', function (req, socket, bodyhead) {
var hostPort = getHostPortFromString(req.url, 443);
var hostDomain = hostPort[0];
var port = parseInt(hostPort[1]);
console.log('Proxying HTTPS request for:', hostDomain, port);
req.headers['x-target'] = 'http://' + hostDomain + ':' + port;
req.headers['x-proxy-username'] = config.username;
req.headers['x-proxy-password'] = config.password;
var proxyHost = new URL(config.server);
var proxySocket = new net.Socket();
proxySocket.connect(
{ port: proxyHost.port, host: proxyHost.hostname },
function () {
console.log('bodyhead', bodyhead.toString()); //debug
proxySocket.write(bodyhead);
socket.write(
'HTTP/' + req.httpVersion + ' 200 Connection established\r\n\r\n'
);
}
);
proxySocket.on('data', function (chunk) {
console.log('proxy data chunk', chunk.toString()); // debug
socket.write(chunk);
});
proxySocket.on('end', function () {
socket.end();
});
proxySocket.on('error', function () {
socket.write('HTTP/' + req.httpVersion + ' 500 Connection error\r\n\r\n');
socket.end();
});
socket.on('data', function (chunk) {
console.log('data chunk', chunk.toString('utf8')); // debug
proxySocket.write(chunk);
});
socket.on('end', function () {
proxySocket.end();
});
socket.on('error', function () {
proxySocket.end();
});
});
Don't judge me too hard, just trying to get it working first.
When proxying http with windows 10 proxy settings, it works fine. But when I am trying to proxy https, it logs encoded data like `↕►♦♦♦☺♣♣♣♠♠☺↕3+)/1.1♣♣☺
☺↔ \s☻�t�DQ��g}T�c\‼sO��♦��U��ޝ∟-☻☺☺+♂
→→♥♦♥♥♥☻♥☺♥☻☻j☺§�` and gives a 400 bad request.I don't know if its the encoding of https response or something else, I have no idea what i am doing at this point and need help.

Answer 1

it is because https uses tls/ssl to encrypt the data.