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chat.go
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/
chat.go
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package main
import (
"fmt"
"io"
"log"
"net"
)
const listenAddr = "localhost:4000"
func main() {
l, err := net.Listen("tcp", listenAddr)
if err != nil {
log.Fatal(err)
}
for {
c, err := l.Accept()
if err != nil {
log.Fatal(err)
}
go match(c)
}
}
var partner = make(chan io.ReadWriteCloser)
func match(c io.ReadWriteCloser) {
fmt.Fprint(c, "Waiting for a partner...")
select {
case partner <- c:
// now handled by the other goroutine
case p := <-partner:
chat(p, c)
}
}
func chat(a, b io.ReadWriteCloser) {
fmt.Fprintln(a, "Found one! Say hi.")
fmt.Fprintln(b, "Found one! Say hi.")
go io.Copy(a, b)
io.Copy(b, a)
}