go语言实现 tcp客户端/服务端
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/ server.go /package main
import (
"bufio"
"fmt"
"net"
"time"
)
func main() {
var tcpAddr *net.TCPAddr
tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")
tcpListener, _ := net.ListenTCP("tcp", tcpAddr)
defer tcpListener.Close()
for {
tcpConn, err := tcpListener.AcceptTCP()
if err != nil {
continue
}
fmt.Println("A client connected : " + tcpConn.RemoteAddr().String())
go tcpPipe(tcpConn)
}
}
func tcpPipe(conn *net.TCPConn) {
ipStr := conn.RemoteAddr().String()
defer func() {
fmt.Println("disconnected :" + ipStr)
conn.Close()
}()
reader := bufio.NewReader(conn)
for {
message, err := reader.ReadString(‘\n‘)
if err != nil {
return
}
fmt.Println(string(message))
msg := time.Now().String() + "\n"
b := []byte(msg)
conn.Write(b)
}
}
/client.go /
package main
import (
"bufio"
"fmt"
"net"
"time"
)
var quitSemaphore chan bool
func main() {
var tcpAddr *net.TCPAddr
tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")
conn, _ := net.DialTCP("tcp", nil, tcpAddr)
defer conn.Close()
fmt.Println("connected!")
go onMessageRecived(conn)
b := []byte("time\n")
conn.Write(b)
<-quitSemaphore
}
func onMessageRecived(conn *net.TCPConn) {
reader := bufio.NewReader(conn)
for {
msg, err := reader.ReadString(‘\n‘)
fmt.Println(msg)
if err != nil {
quitSemaphore <- true
break
}
time.Sleep(time.Second)
b := []byte(msg)
conn.Write(b)
}
}
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