-
-
Save chenwaichung/3025ece283ab272fa0b45b93cbdd16d9 to your computer and use it in GitHub Desktop.
golang tcp client connection alive check
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"fmt" | |
"io" | |
"net" | |
"time" | |
) | |
func main() { | |
conn, _ := net.Dial("tcp", "127.0.0.1:8081") | |
err := conn.(*net.TCPConn).SetKeepAlive(true) | |
if err != nil { | |
fmt.Println(err) | |
return | |
} | |
err = conn.(*net.TCPConn).SetKeepAlivePeriod(30 * time.Second) | |
if err != nil { | |
fmt.Println(err) | |
return | |
} | |
notify := make(chan error) | |
go func() { | |
buf := make([]byte, 1024) | |
for { | |
n, err := conn.Read(buf) | |
if err != nil { | |
notify <- err | |
if io.EOF == err { | |
return | |
} | |
} | |
if n > 0 { | |
fmt.Println("unexpected data: %s", buf[:n]) | |
} | |
} | |
}() | |
for { | |
select { | |
case err := <-notify: | |
fmt.Println("connection dropped message", err) | |
break | |
case <-time.After(time.Second * 1): | |
fmt.Println("timeout 1, still alive") | |
} | |
} | |
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main | |
import ( | |
"fmt" | |
"io" | |
"net" | |
"time" | |
) | |
func handleConnection(conn net.Conn) { | |
defer conn.Close() | |
notify := make(chan error) | |
go func() { | |
buf := make([]byte, 1024) | |
for { | |
n, err := conn.Read(buf) | |
if err != nil { | |
notify <- err | |
return | |
} | |
if n > 0 { | |
fmt.Println("unexpected data: %s", buf[:n]) | |
} | |
} | |
}() | |
for { | |
select { | |
case err := <-notify: | |
if io.EOF == err { | |
fmt.Println("connection dropped message", err) | |
return | |
} | |
case <-time.After(time.Second * 1): | |
fmt.Println("timeout 1, still alive") | |
} | |
} | |
} | |
func main() { | |
fmt.Println("Launching server...") | |
ln, _ := net.Listen("tcp", ":8081") | |
for { | |
conn, _ := ln.Accept() | |
go handleConnection(conn) | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment