[Go] 轻量服务器框架基础TCP连接的抽象和封装

对tcp连接部分以及与连接绑定的业务部分进行抽象和封装

主要是对连接的开启关闭和读写进行封装，抽象出接口，使用回调进行具体业务的绑定

zinterface/iconnection.go

package zinterface

import "net"

type IConnection interface{
    Start()
    Stop()
    GetConnId() uint32
    IsClosed() bool
    Send(data []byte,len int) error
    GetRemoteAddr() net.Addr
    GetConn() *net.TCPConn
}
type HandleFunc func (*net.TCPConn,[]byte,int) error

znet/connection.go

package znet

import (
    "log"
    "net"
    "zinx/zinterface"
)

type Connection struct {
    ConnId     uint32
    Conn       *net.TCPConn
    Closed     bool
    RemoteAddr net.Addr
    ExitChan   chan bool
    HandleAPI  zinterface.HandleFunc
}

func NewConnection(connid uint32, conn *net.TCPConn, callback zinterface.HandleFunc) zinterface.IConnection {
    c := &Connection{
        ConnId:    connid,
        Conn:      conn,
        Closed:    false,
        ExitChan:  make(chan bool, 1),
        HandleAPI: callback,
    }
    return c
}
func (c *Connection) StartRead() {
    defer c.Stop()
    for {
        b := make([]byte, 512)
        len, err := c.Conn.Read(b)
        if err != nil {
            log.Println("read tcp err ", err)
            break
        }
        log.Printf("recv from client %s,len=%d,connid=%d", b, len,c.ConnId)

        if err:=c.HandleAPI(c.Conn,b,len);err!=nil{
            log.Println("c.handleAPI err ",err)
            break
        }

    }
}
func (c *Connection) Start() {
    go c.StartRead()
}
func (c *Connection) Stop() {
    if c.Closed {
        return
    }
    c.Closed = true
    c.Conn.Close()
    close(c.ExitChan)
}
func (c *Connection) GetConnId() uint32 {
    return c.ConnId
}

func (c *Connection) Send(data []byte, len int) error {
    return nil
}
func (c *Connection) GetRemoteAddr() net.Addr {
    return c.Conn.RemoteAddr()
}
func (c *Connection) GetConn() *net.TCPConn {
    return c.Conn
}
func (c *Connection) IsClosed() bool {
    return c.Closed
}

znet/server.go

package znet

import (
    "fmt"
    "errors"
    "log"
    "net"
    "zinx/zinterface"
)

type Server struct {
    Name      string
    IP        string
    IPversion string
    Port      int
}
func Callbackapi(conn *net.TCPConn,readData []byte,len int) error{
    if _, err := conn.Write(readData[:len]); err != nil {
        log.Println("write tcp err ", err)
        return errors.New("write tcp err")
    }
    log.Println("callback write...")
    return nil
}
func (s *Server) Start() {
    log.Printf("%s %s:%d start...\n", s.Name, s.IP, s.Port)
    go func() {
        addr, err := net.ResolveTCPAddr(s.IPversion, fmt.Sprintf("%s:%d", s.IP, s.Port))
        if err != nil {
            log.Println("resolve tcp addr err ", err)
            return
        }
        listener, err := net.ListenTCP(s.IPversion, addr)
        if err != nil {
            log.Println("listen tcp err ", err)
            return
        }
        var connid uint32
        connid=0
        for {
            conn, err := listener.AcceptTCP()
            if err != nil {
                log.Println("accept tcp err ", err)
                continue
            }
            dealConn:=NewConnection(connid,conn,Callbackapi)
            go dealConn.Start()
            connid++
        }
    }()

}
func (s *Server) Stop() {

}
func (s *Server) Server() {
    s.Start()
    select {}
}
func NewServer(name string) zinterface.IServer {
    s := &Server{
        Name:      name,
        IP:        "0.0.0.0",
        IPversion: "tcp4",
        Port:      8999,
    }
    return s
}