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proxy.go
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/
proxy.go
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package controllers
import (
"fmt"
"io"
"net"
"sync"
"time"
"github.com/convox/rack/api/httperr"
"github.com/gorilla/mux"
"golang.org/x/net/websocket"
)
func Proxy(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
host := vars["host"]
port := vars["port"]
conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%s", host, port), 3*time.Second)
if neterr, ok := err.(net.Error); ok && neterr.Timeout() {
return httperr.Errorf(403, "timeout")
}
if err != nil {
return httperr.Server(err)
}
var wg sync.WaitGroup
wg.Add(2)
go copyAsync(ws, conn, &wg)
go copyAsync(conn, ws, &wg)
wg.Wait()
return nil
}
func copyAsync(dst io.Writer, src io.Reader, wg *sync.WaitGroup) {
defer wg.Done()
io.Copy(dst, src)
}