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network port forwarding in go lang
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package main | |
import ( | |
"fmt" | |
"io" | |
"net" | |
) | |
func main() { | |
ln, err := net.Listen("tcp", ":8452") | |
if err != nil { | |
panic(err) | |
} | |
for { | |
conn, err := ln.Accept() | |
if err != nil { | |
panic(err) | |
} | |
go handleRequest(conn) | |
} | |
} | |
func handleRequest(conn net.Conn) { | |
fmt.Println("new client") | |
proxy, err := net.Dial("tcp", "127.0.0.1:80") | |
if err != nil { | |
panic(err) | |
} | |
fmt.Println("proxy connected") | |
go copyIO(conn, proxy) | |
go copyIO(proxy, conn) | |
} | |
func copyIO(src, dest net.Conn) { | |
defer src.Close() | |
defer dest.Close() | |
io.Copy(src, dest) | |
} |
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