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gudp
模块提供了非常简便易用的gudp.Conn
链接操作对象。
使用方式:
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import "github.com/gogf/gf/v2/net/gudp" |
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接口文档: https://
...
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dev/github.com/gogf/gf/v2/net/gudp
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type Conn
func NewConn(raddr string, laddr ...string) (*Conn, error)
func NewConnByNetConn(udp *net.UDPConn) *Conn
func (c *Conn) Close() error
func (c *Conn) LocalAddr() net.Addr
func (c *Conn) Recv(length int, retry ...Retry) ([]byte, error)
func (c *Conn) RecvPkg(retry ...Retry) (result []byte, err error)
func (c *Conn) RecvPkgWithTimeout(timeout time.Duration, retry ...Retry) ([]byte, error)
func (c *Conn) RecvWithTimeout(length int, timeout time.Duration, retry ...Retry) ([]byte, error)
func (c *Conn) RemoteAddr() net.Addr
func (c *Conn) Send(data []byte, retry ...Retry) error
func (c *Conn) SendPkg(data []byte, retry ...Retry) error
func (c *Conn) SendPkgWithTimeout(data []byte, timeout time.Duration, retry ...Retry) error
func (c *Conn) SendRecv(data []byte, receive int, retry ...Retry) ([]byte, error)
func (c *Conn) SendRecvPkg(data []byte, retry ...Retry) ([]byte, error)
func (c *Conn) SendRecvPkgWithTimeout(data []byte, timeout time.Duration, retry ...Retry) ([]byte, error)
func (c *Conn) SendRecvWithTimeout(data []byte, receive int, timeout time.Duration, retry ...Retry) ([]byte, error)
func (c *Conn) SendWithTimeout(data []byte, timeout time.Duration, retry ...Retry) error
func (c *Conn) SetDeadline(t time.Time) error
func (c *Conn) SetRecvBufferWait(d time.Duration)
func (c *Conn) SetRecvDeadline(t time.Time) error
func (c *Conn) SetSendDeadline(t time.Time) error |
...
可以看到,gudp.Conn
和gtcp.Conn
的方法非常类似,并且也支持简单协议的消息包方法。
基本介绍
gudp.Conn
的操作绝大部分类似于gtcp
的操作方式(大部分的方法名称也相同),但由于UDP
是面向非连接的协议,因此gudp.Conn
(底层通信端口)也只能完成最多一次数据写入和读取,客户端下一次再与目标服务端进行通信的时候,将需要创建新的Conn
对象进行通信。
使用示例
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package main import ( "fmt" "github.com/gogf/gf/v2/frame/g" "github.com/gogf/gf/v2/net/gudp" "github.com/gogf/gf/v2/os/gtime" "time" ) func main() { // Server go gudp.NewServer("127.0.0.1:8999", func(conn *gudp.Conn) { defer conn.Close() for { data, err := conn.Recv(-1) if len(data) > 0 { if err := conn.Send(append([]byte("> "), data...)); err != nil { g.Log().Error(err) } } if err != nil { g.Log().Error(err) } } }).Run() time.Sleep(time.Second) // Client for { if conn, err := gudp.NewConn("127.0.0.1:8999"); err == nil { if b, err := conn.SendRecv([]byte(gtime.Datetime()), -1); err == nil { fmt.Println(string(b), conn.LocalAddr(), conn.RemoteAddr()) } else { g.Log().Error(err) } conn.Close() } else { g.Log().Error(err) } time.Sleep(time.Second) } } |
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该示例与gtcp.Conn
中的通信示例类似,不同的是,客户端与服务端无法保持连接,每次通信都需要创建的新的连接对象进行通信。
执行后,输出结果如下:
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> 2018-07-21 23:13:31 127.0.0.1:33271 127.0.0.1:8999
> 2018-07-21 23:13:32 127.0.0.1:45826 127.0.0.1:8999
> 2018-07-21 23:13:33 127.0.0.1:58027 127.0.0.1:8999
> 2018-07-21 23:13:34 127.0.0.1:33056 127.0.0.1:8999
> 2018-07-21 23:13:35 127.0.0.1:39260 127.0.0.1:8999
> 2018-07-21 23:13:36 127.0.0.1:33967 127.0.0.1:8999
> 2018-07-21 23:13:37 127.0.0.1:52359 127.0.0.1:8999
... |
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