本文关键词：内网穿透
内网穿透是用来做什么的，大家都知道本地的电脑做的网站外网是访问不了的，只能通过127.0.0.1在本地访问。但是在本地的程序想调试微信的程序，或者想让别人在远程能访问到你电脑的程序。内网穿透就派上用上了。
用法：
1、在有独立ip的一台服务器上运行node server.js。
2、在本地运行 node client.js
3、世界上任何一个地点访问：http://独立ip:7777就可以访问到本地电脑里的127.0.0.1：80
说明：端口在client跟server代码的最后一行都可以换。
下面是client.js的代码
(function() {
var Net;
Net = require('net');
Client = (function() {
function _Class(localAddress, remoteAddress) {
this.localAddress = localAddress;
this.remoteAddress = remoteAddress;
this.createDaemonSocket();
}
_Class.prototype.createDaemonSocket = function() {
var ping;
ping = Buffer.from([0]);
this.daemonSocket = this.connectRemote((function(_this) {
return function() {
_this.daemonSocket.ref();
_this.daemonSocket.on('data', function(data) {
var uuid;
if (data.length === 4) {
uuid = data.readInt32LE(0);
console.info("request pipe " + uuid);
return _this.createTunnel(uuid);
}
});
_this.daemonSocket.write(ping);
return setInterval(function() {
return _this.daemonSocket.write(ping);
}, 10000);
};
})(this));
return this.daemonSocket.on('close', (function(_this) {
return function() {
return setTimeout(function() {
return _this.createDaemonSocket();
}, 1000);
};
})(this));
};
_Class.prototype.connectRemote = function(cb) {
var socket;
socket = Net.connect(this.remoteAddress.port, this.remoteAddress.ip, cb);
socket.on('error', console.error);
return socket;
};
_Class.prototype.connectLocal = function(cb) {
var socket;
socket = Net.connect(this.localAddress.port, this.localAddress.ip, cb);
socket.on('error', console.error);
return socket;
};
_Class.prototype.createTunnel = function(uuid) {
var ping, socket;
ping = new Buffer(4);
ping.writeInt32LE(uuid, 0);
return socket = this.connectRemote((function(_this) {
return function() {
var local;
console.info("connect remote " + uuid);
return local = _this.connectLocal(function() {
console.info("connect local " + uuid);
socket.write(ping);
socket.pipe(local).pipe(socket);
return console.info("piped " + uuid);
});
};
})(this));
};
return _Class;
})();
}).call(this);
new Client({'port':80,'ip':'127.0.0.1'},{'port':8888,'ip':'127.0.0.1'});下面是server.js的代码
(function() {
var Net;
Net = require('net');
Client = (function() {
function _Class(localAddress, remoteAddress) {
this.localAddress = localAddress;
this.remoteAddress = remoteAddress;
this.createDaemonSocket();
}
_Class.prototype.createDaemonSocket = function() {
var ping;
ping = Buffer.from([0]);
this.daemonSocket = this.connectRemote((function(_this) {
return function() {
_this.daemonSocket.ref();
_this.daemonSocket.on('data', function(data) {
var uuid;
if (data.length === 4) {
uuid = data.readInt32LE(0);
console.info("request pipe " + uuid);
return _this.createTunnel(uuid);
}
});
_this.daemonSocket.write(ping);
return setInterval(function() {
return _this.daemonSocket.write(ping);
}, 10000);
};
})(this));
return this.daemonSocket.on('close', (function(_this) {
return function() {
return setTimeout(function() {
return _this.createDaemonSocket();
}, 1000);
};
})(this));
};
_Class.prototype.connectRemote = function(cb) {
var socket;
socket = Net.connect(this.remoteAddress.port, this.remoteAddress.ip, cb);
socket.on('error', console.error);
return socket;
};
_Class.prototype.connectLocal = function(cb) {
var socket;
socket = Net.connect(this.localAddress.port, this.localAddress.ip, cb);
socket.on('error', console.error);
return socket;
};
内网穿透– 用我最直白的语言解读优秀源码
_Class.prototype.createTunnel = function(uuid) {
var ping, socket;
ping = new Buffer(4);
ping.writeInt32LE(uuid, 0);
return socket = this.connectRemote((function(_this) {
return function() {
var local;
console.info("connect remote " + uuid);
return local = _this.connectLocal(function() {
console.info("connect local " + uuid);
socket.write(ping);
socket.pipe(local).pipe(socket);
return console.info("piped " + uuid);
});
};
})(this));
};
return _Class;
})();
}).call(this);
new Client({'port':80,'ip':'127.0.0.1'},{'port':8888,'ip':'127.0.0.1'});大体的流程是：
1、server.js启动，监听8888跟7777端口。
2、client.js启动，与server的8888端口链接，这个TCP链接是主要链接，后面的其他TCP分裂，client与server协商都靠这个TCP，此链接不参与具体业务数据传送。
3、server上面的7777有TCP链接接入，server给此socket起一个唯一数，并作为对象的键存起来，而且通过主TCP通道高速client。
4、client收到后，与server新建一个TCP链接，第一个信息就是这个唯一数，server把此socket与7777端口进来的socket对接，转发数据。
5、至此，一个单线程、事件驱动、多tcp的内网穿透开启完毕
内网穿透– 用我最直白的语言解读优秀源码
