[英]Node JS TCP Proxy: Set up HTTP Tunnel using Node JS
I'm trying to implement a TCP proxy in Node JS. 我正在尝试在Node JS中实现TCP代理。 I only have some experience with Javascript so I met a lot of problems along the way.
我只有Java方面的经验,所以在此过程中遇到了很多问题。 I've done a lot of searching for this one but had no luck.
我已经做了很多寻找,但是没有运气。
I want to implement a two-hop TCP connection for HTTPS proxy. 我想为HTTPS代理实现两跳TCP连接。 Here is part of my code.
这是我的代码的一部分。
var net = require('net');
var server = net.createServer(function(clientSock) {
var connected = false;
var serverSock;
clientSock.on('data', function(clientData) {
if (connected) {
// Send future messages if is connected
serverSocet.write(clientData);
} else {
var host = // get from data
var port = // get from data
if (clientData is a CONNECT request) {
// Create a new socket to server
if (!serverSock) {
serverSock = new net.Socket();
serverSock.connect(port, host, function() {
// Send the CONNECT request (Client Hello)
serverSock.write(clientData);
connected = true;
clientSock.write('HTTP/1.1 200 OK\r\n');
});
serverSock.on('data', function(serverData) {
clientSock.write(serverData);
});
}
}
});
});
I used Wireshark to capture the packets sent if I visit https://www.google.com . 如果访问https://www.google.com,我会使用Wireshark捕获发送的数据包。 If I don't use my proxy, the "Client Hello" message is sent in TLS v1.2.
如果我不使用代理,则会在TLS v1.2中发送“ Client Hello”消息。 But if I use my proxy, it is sent by SSL.
但是,如果我使用代理,它是通过SSL发送的。 The server always reject my CONNECT request and send back a reset request.
服务器始终拒绝我的CONNECT请求并发送回重置请求。
I also tried the TLS API in Node JS. 我还尝试了Node JS中的TLS API。 The server accepted my CONNECT request but always request me to start a new session after the Key Exchange.
服务器接受了我的CONNECT请求,但始终要求我在密钥交换后开始新的会话。 The browser will close the socket and create a new socket.
浏览器将关闭套接字并创建一个新的套接字。 But it never loaded the page...
但是它从来没有加载过页面...
I've spent a whole day on this single problem. 我花了整整一天的时间来解决这个问题。 I believe I can use TCP socket to implement HTTP Tunnel.
我相信我可以使用TCP套接字来实现HTTP隧道。 Please help... Thanks a lot!!
请帮助...非常感谢!
Problem solved! 问题解决了!
To make TCP socket use TLS v1.2 while dealing with HTTPS, just put this option, {allowHalfOpen: true}, as parameter when creating the sockets. 要使TCP套接字在处理HTTPS时使用TLS v1.2,只需在创建套接字时将此参数{allowHalfOpen:true}作为参数即可。
New Code would look like this: 新代码如下所示:
var net = require('net');
// option here
var server = net.createServer({allowHalfOpen: true}, function(clientSock) {
var connected = false;
var serverSock;
clientSock.on('data', function(clientData) {
if (connected) {
// Send future messages if is connected
serverSocet.write(clientData);
} else {
var host = // get from data
var port = // get from data
if (clientData is a CONNECT request) {
// Create a new socket to server
if (!serverSock) {
// Option here
serverSock = new net.Socket({allowHalfOpen: true});
serverSock.connect(port, host, function() {
// Don't need to forward hello message from client
// Connect method automatically sends it for you
//serverSock.write(clientData);
connected = true;
clientSock.write('HTTP/1.1 200 OK\r\n');
});
serverSock.on('data', function(serverData) {
clientSock.write(serverData);
});
}
}
});
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