/
main.go
72 lines (63 loc) · 1.25 KB
/
main.go
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package main
import (
"fmt"
manet "github.com/Gaboose/go-multiaddr-net"
ma "github.com/jbenet/go-multiaddr"
"io"
lg "log"
"os"
"strings"
)
var log = lg.New(os.Stdout, "", lg.LstdFlags|lg.Lshortfile)
func main() {
ip := os.Getenv("OPENSHIFT_GO_IP")
if ip == "" {
ip = "127.0.0.1"
}
port := os.Getenv("OPENSHIFT_GO_PORT")
if port == "" {
port = "8000"
}
m, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%s/ws/echo", ip, port))
if err != nil {
panic(err)
}
go serve(m, func(s string) string {
return fmt.Sprintf("you're the \"%s\"\n", s)
})
m, err = ma.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/%s/ws/notecho", ip, port))
if err != nil {
panic(err)
}
serve(m, func(s string) string {
return "not speaking to you\n"
})
}
func serve(m ma.Multiaddr, handler func(string) string) {
ln, err := manet.Listen(m)
if err != nil {
panic(err)
}
for {
c, err := ln.Accept()
if err != nil {
log.Println(err)
return
}
go echo(c, handler)
}
}
func echo(rwc io.ReadWriteCloser, handler func(string) string) {
for {
buf := make([]byte, 256)
n, err := rwc.Read(buf)
if err != nil {
log.Println(err)
rwc.Close()
return
}
s := strings.TrimRight(string(buf[:n]), "\n")
s = handler(s)
_, err = rwc.Write([]byte(s))
}
}