https://github.com/play175/exbuffer

ExBuffer，NodeJs的TCP中的粘包、分包问题的解决方案！
https://github.com/play175/exbuffer

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ExBuffer，NodeJs的TCP中的粘包、分包问题的解决方案！

• Host: GitHub
• URL: https://github.com/play175/exbuffer
• Owner: play175
• Created: 2012-06-15T08:39:25.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2018-10-24T12:44:36.000Z (about 6 years ago)
• Last Synced: 2024-11-30T22:48:46.874Z (about 1 month ago)
• Language: JavaScript
• Homepage: https://play175.com/ExBuffer/
• Size: 18.6 KB
• Stars: 77
• Watchers: 5
• Forks: 27
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
ExBuffer，NodeJs的TCP中的粘包、分包问题的解决方案！

推荐结合ByteBuffer来做通信协议！https://github.com/play175/ByteBuffer

C版本的ExBuffer：https://github.com/play175/exbuffer.c

```javascript

var ExBuffer = require('./ExBuffer');

/*************************基本操作****************************/

//构造一个ExBuffer，采用4个字节（uint32无符号整型）表示包长，而且是little endian 字节序

var exBuffer = new ExBuffer().uint32Head().littleEndian();

//或者构造一个ExBuffer，采用2个字节（ushort型）表示包长，而且是big endian 字节序 (默认)

var exBuffer = new ExBuffer().ushortHead().bigEndian();

//只要收到满足的包就会触发事件

exBuffer.on('data',function(buffer){

    console.log('>> receive data,length:'+buffer.length);

    //console.log(buffer);

});

//传入一个9字节长的数据，分多次put （对应于TCP中的分包的情况）

exBuffer.put(new Buffer([0,9]));

exBuffer.put(new Buffer([1,2,3,4,5,6,7]));

exBuffer.put(new Buffer([8,9]));

//传入一个3个字节的数据和一个6个字节的数据，一次put（对应于TCP中的粘包的情况）

exBuffer.put(new Buffer([0,3,1,2,3,0,6,1,2,3,4,5,6]));

//大数据处理测试 (20MB)

var exBuffer = new ExBuffer().uint32Head().bigEndian();

exBuffer.on('data',function(buffer){

    console.log('>> receive data,length:'+buffer.length);

    console.log(buffer);

});

var sbuf = new Buffer(4);

sbuf.writeUInt32BE(1024*1024*20,0);//写入包长

exBuffer.put(sbuf);

exBuffer.put(new Buffer(1024*1024*20));

/*************************在socket中的应用****************************/

console.log('-----------------------use in socket------------------------');

var net = require('net');

//测试服务端

var server = net.createServer(function(socket) {

  console.log('client connected');

  new Connection(socket);//有客户端连入时

});

server.listen(8124);

//服务端中映射客户端的类

function Connection(socket) {

    var exBuffer = new ExBuffer();

    exBuffer.on('data',onReceivePackData);

    socket.on('data', function(data) {

        exBuffer.put(data);//只要收到数据就往ExBuffer里面put

    });

    //当服务端收到完整的包时

    function onReceivePackData(buffer){

        console.log('>> server receive data,length:'+buffer.length);

        console.log(buffer.toString());

        var data = 'wellcom, I am server';

        var len = Buffer.byteLength(data);

        //写入2个字节表示本次包长

        var headBuf = new Buffer(2);

        headBuf.writeUInt16BE(len, 0)

        socket.write(headBuf);

        var bodyBuf = new Buffer(len);

        bodyBuf.write(data);

        socket.write(bodyBuf);

    }

}

//测试客户端

var exBuffer = new ExBuffer();

var client = net.connect(8124, function() {

  var data = 'hello I am client';

  var len = Buffer.byteLength(data);

  //写入2个字节表示本次包长

  var headBuf = new Buffer(2);

  headBuf.writeUInt16BE(len, 0)

  client.write(headBuf);

  var bodyBuf = new Buffer(len);

  bodyBuf.write(data);

  client.write(bodyBuf);

  

});

client.on('data', function(data) {

  exBuffer.put(data);//只要收到数据就往ExBuffer里面put

});

//当客户端收到完整的数据包时

exBuffer.on('data', function(buffer) {

    console.log('>> client receive data,length:'+buffer.length);

    console.log(buffer.toString());

});

```

安装

```javascript

npm install ExBuffer

```