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Example: Go Websocket binary proxy noVnc
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package main | |
import ( | |
"flag" | |
"golang.org/x/net/websocket" | |
"io" | |
"log" | |
"net" | |
"net/http" | |
"os" | |
) | |
var ( | |
sourceAddr = flag.String("source", "", "source address") | |
targeAddr = flag.String("target", "", "target address") | |
) | |
func main() { | |
flag.Parse() | |
if *sourceAddr == "" || *targeAddr == "" { | |
flag.PrintDefaults() | |
os.Exit(1) | |
} | |
mux := websocket.Server{ | |
Handshake: bootHandshake, | |
Handler: handleWss} | |
http.Handle("/websockify", mux) | |
err := http.ListenAndServe(*sourceAddr, nil) | |
if err != nil { | |
log.Fatal(err) | |
} | |
} | |
func handleWss(wsconn *websocket.Conn) { | |
log.Println("handlewss") | |
conn, err := net.Dial("tcp", *targeAddr) | |
if err != nil { | |
log.Println(err) | |
wsconn.Close() | |
} else { | |
wsconn.PayloadType = websocket.BinaryFrame | |
go io.Copy(conn, wsconn) | |
go io.Copy(wsconn, conn) | |
select {} | |
} | |
} | |
func bootHandshake(config *websocket.Config, r *http.Request) error { | |
config.Protocol = []string{"binary"} | |
r.Header.Set("Access-Control-Allow-Origin", "*") | |
r.Header.Set("Access-Control-Allow-Methods", "GET, POST, PUT, PATCH, DELETE") | |
return nil | |
} |
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