Node.js Net TCP缓冲内存泄漏

Question

I'm writing a TCP game server in Node.js and am having issues with splitting the TCP stream into messages. As i want to read numbers and floats from the buffer i cannot find a suitable module to outsource to as all the ones i've found deal with simple strings ending with a new line delimiter. I decided to go with prefixing each message with the length in bytes of the message. I did this and wrote a simple program to spam the server with random messages ( well constructed with a UInt16LE prefix depicting the length of the message ). I noticed that the longer I leave the programs running my actual server keeps using up more and more memory. I tried using a debugging tool to trace the memory allocation with no success so I figured i'd post my code here and hope for a reply. So here is my code... any tips or pointers as to where I'm going wrong or what I can do differently/more efficiently would be amazing! Thanks.

server.on("connection", function(socket) {
var session = new sessionCS(socket);
console.log("Connection from " + session.address);

// data buffering variables
var currentBuffer = new Buffer(args.bufSize);
var bufWrite = 0;
var bufRead = 0;
var mSize = null;
var i = 0;

socket.on("data", function(dataBuffer) {

    // check if buffer risk of overflow
    if (bufWrite + dataBuffer.length > args.bufSize-1) {
        var newBufWrite = 0;
        var newBuffer = new Buffer(args.bufSize);

        while(bufRead < bufWrite) {
            newBuffer[newBufWrite] = currentBuffer[bufRead];
            newBufWrite++;
            bufRead++;
        }

        currentBuffer = newBuffer;
        bufWrite = newBufWrite;
        bufRead = 0;
        newBufWrite = null;
    }

    // appending buffer
    for (i=0; i<dataBuffer.length; i++) {
        currentBuffer[bufWrite] = dataBuffer[i];
        bufWrite ++;
    }

    // if beginning of message not acknowleged
    if (mSize === null && (bufWrite - bufRead) >= 2) {
        mSize = currentBuffer.readUInt16LE(bufRead);
    }

    // if difference between read and write is greater or equal to message mSize + 2
    // +2 for the integer holding the message size
    // this means that a full message is in the buffer and needs to be extracted
    while ((bufWrite - bufRead) >= mSize+2) {
        bufRead += 2;
        var messageBuffer = new Buffer(mSize);

        for(i=0; i<messageBuffer.length; i++) {
            messageBuffer[i] = currentBuffer[bufRead];
            bufRead++;
        }

        // this is where the message buffer would be passed to the router
        router(session, messageBuffer);
        messageBuffer = null;

        // seeinf if another message length indicator is in the buffer
        if ((bufWrite - bufRead) >= 2) {
            mSize = currentBuffer.readUInt16LE(bufRead);
        }
        else {
            mSize = null;
        }
    }
});
}

Answer 1

缓冲区帧序列化协议（BUFSP） https://github.com/teambition/bufsp可能是您想要的：将消息编码为缓冲区，写入TCP，接收TCP流缓冲区并将其拆分为消息。