tcppk/lib/msgCenter.js

The solution of sticky package problem of TCP for Node.Js !

'use strict'

const Stick = require('./core')

module.exports = function msgCenter(option) {

    option = option || {}
    const bufferSize = option.bufferSize || 1024
    const type = option.type || 16
    const bigEndian = option.bigEndian || true
    const stick = bigEndian ? new Stick(bufferSize).setReadIntBE(type) : new Stick(bufferSize).setReadIntLE(type)

    // 向stick 队列中推送消息
    this.putMsg = function (msg) {
        stick.putMsg(msg)
    }

    // 向stick 队列中推送字节流
    this.putData = function (data) {
        stick.putData(data)
    }

    this.publish = function (msg) {
        return stick.publish(msg)
    }

    this.onMsgRecv = function (msgHandleFun) {

        stick.onData(function (data) {
            
            const headLen = stick.dataHeadLen
            const head = new Buffer(headLen)
            data.copy(head, 0, 0, headLen)

            const dataLen = head[stick.readIntMethod]()
            const body = new Buffer(dataLen)
            data.copy(body, 0, headLen, headLen + dataLen)

            msgHandleFun(body)
        })
    }

}