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195 lines
4.5 KiB
195 lines
4.5 KiB
package znet
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import (
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"errors"
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"fmt"
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"io"
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"net"
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"zinx/ziface"
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)
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type Connection struct {
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//当前连接的socket TCP套接字
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Conn *net.TCPConn
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//当前连接的ID 也可以称作为SessionID,ID全局唯一
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ConnID uint32
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//当前连接的关闭状态
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isClosed bool
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//消息管理MsgId和对应处理方法的消息管理模块
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MsgHandler ziface.IMsgHandle
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//告知该链接已经退出/停止的channel
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ExitBuffChan chan bool
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//无缓冲管道,用于读、写两个goroutine之间的消息通信
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msgChan chan []byte
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//给缓冲队列发送数据的channel,
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// 如果向缓冲队列发送数据,那么把数据发送到这个channel下
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// SendBuffChan chan []byte
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}
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//创建连接的方法
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func NewConntion(conn *net.TCPConn, connID uint32, msgHandler ziface.IMsgHandle) *Connection{
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c := &Connection{
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Conn: conn,
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ConnID: connID,
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isClosed: false,
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MsgHandler: msgHandler,
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ExitBuffChan: make(chan bool, 1),
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msgChan:make(chan []byte),
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// SendBuffChan: make(chan []byte, 512),
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}
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return c
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}
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/*
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写消息Goroutine, 用户将数据发送给客户端
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*/
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func (c *Connection) StartWriter() {
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defer fmt.Println(c.RemoteAddr().String(), " conn Writer exit!")
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defer c.Stop()
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for {
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select {
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case data := <-c.msgChan:
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//有数据要写给客户端
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if _, err := c.Conn.Write(data); err != nil {
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fmt.Println("Send Data error:, ", err, " Conn Writer exit")
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return
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}
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case <- c.ExitBuffChan:
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//conn已经关闭
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return
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}
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}
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}
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/*
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读消息Goroutine,用于从客户端中读取数据
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*/
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func (c *Connection) StartReader() {
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fmt.Println("Reader Goroutine is running")
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defer fmt.Println(c.RemoteAddr().String(), " conn reader exit!")
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defer c.Stop()
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for {
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// 创建拆包解包的对象
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dp := NewDataPack()
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//读取客户端的Msg head
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headData := make([]byte, dp.GetHeadLen())
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if _, err := io.ReadFull(c.GetTCPConnection(), headData); err != nil {
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fmt.Println("read msg head error ", err)
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c.ExitBuffChan <- true
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continue
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}
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//拆包,得到msgid 和 datalen 放在msg中
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msg , err := dp.Unpack(headData)
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if err != nil {
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fmt.Println("unpack error ", err)
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c.ExitBuffChan <- true
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continue
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}
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//根据 dataLen 读取 data,放在msg.Data中
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var data []byte
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if msg.GetDataLen() > 0 {
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data = make([]byte, msg.GetDataLen())
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if _, err := io.ReadFull(c.GetTCPConnection(), data); err != nil {
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fmt.Println("read msg data error ", err)
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c.ExitBuffChan <- true
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continue
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}
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}
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msg.SetData(data)
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//得到当前客户端请求的Request数据
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req := Request{
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conn:c,
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msg:msg,
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}
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//从绑定好的消息和对应的处理方法中执行对应的Handle方法
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go c.MsgHandler.DoMsgHandler(&req)
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}
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}
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//启动连接,让当前连接开始工作
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func (c *Connection) Start() {
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//1 开启用户从客户端读取数据流程的Goroutine
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go c.StartReader()
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//2 开启用于写回客户端数据流程的Goroutine
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go c.StartWriter()
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for {
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select {
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case <- c.ExitBuffChan:
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//得到退出消息,不再阻塞
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return
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}
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}
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}
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//停止连接,结束当前连接状态M
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func (c *Connection) Stop() {
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//1. 如果当前链接已经关闭
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if c.isClosed == true {
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return
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}
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c.isClosed = true
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//TODO Connection Stop() 如果用户注册了该链接的关闭回调业务,那么在此刻应该显示调用
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// 关闭socket链接
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c.Conn.Close()
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//通知从缓冲队列读数据的业务,该链接已经关闭
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c.ExitBuffChan <- true
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//关闭该链接全部管道
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close(c.ExitBuffChan)
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//close(c.SendBuffChan)
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}
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//从当前连接获取原始的socket TCPConn
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func (c *Connection) GetTCPConnection() *net.TCPConn {
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return c.Conn
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}
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//获取当前连接ID
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func (c *Connection) GetConnID() uint32{
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return c.ConnID
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}
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//获取远程客户端地址信息
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func (c *Connection) RemoteAddr() net.Addr {
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return c.Conn.RemoteAddr()
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}
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//直接将Message数据发送数据给远程的TCP客户端
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func (c *Connection) SendMsg(msgId uint32, data []byte) error {
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if c.isClosed == true {
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return errors.New("Connection closed when send msg")
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}
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//将data封包,并且发送
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dp := NewDataPack()
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msg, err := dp.Pack(NewMsgPackage(msgId, data))
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if err != nil {
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fmt.Println("Pack error msg id = ", msgId)
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return errors.New("Pack error msg ")
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}
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//写回客户端
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c.msgChan <- msg
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return nil
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}
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//将数据发送给缓冲队列,通过专门从缓冲队列读数据的go写给客户端
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//func (c *Connection) SendBuff(data []byte) error {
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// return nil
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//}
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