例如,具有基本数据包协议,例如:
[packetType int] [packetId int] [data [] byte]
让客户端和服务器用它做简单的事情(egx,聊天。)
答案 0 :(得分:5)
这是一个客户端和服务器,带有草率的恐慌错误处理。他们有一些限制:
这是服务器:
package main
import (
"encoding/binary"
"fmt"
"net"
)
type packet struct {
// Field names must be capitalized for encoding/binary.
// It's also important to use explicitly sized types.
// int32 rather than int, etc.
Type int32
Id int32
// This must be an array rather than a slice.
Data [100]byte
}
func main() {
// set up a listener on port 2000
l, err := net.Listen("tcp", ":2000")
if err != nil {
panic(err.String())
}
for {
// start listening for a connection
conn, err := l.Accept()
if err != nil {
panic(err.String())
}
handleClient(conn)
}
}
func handleClient(conn net.Conn) {
defer conn.Close()
// a client has connected; now wait for a packet
var msg packet
binary.Read(conn, binary.BigEndian, &msg)
fmt.Printf("Received a packet: %s\n", msg.Data)
// send the response
response := packet{Type: 1, Id: 1}
copy(response.Data[:], "Hello, client")
binary.Write(conn, binary.BigEndian, &response)
}
这是客户。它发送一个数据包类型为0,ID为0的数据包,内容为“Hello,server”。然后它等待响应,打印并退出。
package main
import (
"encoding/binary"
"fmt"
"net"
)
type packet struct {
Type int32
Id int32
Data [100]byte
}
func main() {
// connect to localhost on port 2000
conn, err := net.Dial("tcp", ":2000")
if err != nil {
panic(err.String())
}
defer conn.Close()
// send a packet
msg := packet{}
copy(msg.Data[:], "Hello, server")
err = binary.Write(conn, binary.BigEndian, &msg)
if err != nil {
panic(err.String())
}
// receive the response
var response packet
err = binary.Read(conn, binary.BigEndian, &response)
if err != nil {
panic(err.String())
}
fmt.Printf("Response: %s\n", response.Data)
}
答案 1 :(得分:3)
查看Jan Newmarch的{{3}}。