mirror of https://github.com/fatedier/frp.git
77 lines
1.4 KiB
Go
77 lines
1.4 KiB
Go
package net
|
|
|
|
import (
|
|
"errors"
|
|
"net"
|
|
"net/http"
|
|
"strconv"
|
|
|
|
"golang.org/x/net/websocket"
|
|
)
|
|
|
|
var ErrWebsocketListenerClosed = errors.New("websocket listener closed")
|
|
|
|
const (
|
|
FrpWebsocketPath = "/~!frp"
|
|
)
|
|
|
|
type WebsocketListener struct {
|
|
ln net.Listener
|
|
acceptCh chan net.Conn
|
|
|
|
server *http.Server
|
|
}
|
|
|
|
// NewWebsocketListener to handle websocket connections
|
|
// ln: tcp listener for websocket connections
|
|
func NewWebsocketListener(ln net.Listener) (wl *WebsocketListener) {
|
|
wl = &WebsocketListener{
|
|
acceptCh: make(chan net.Conn),
|
|
}
|
|
|
|
muxer := http.NewServeMux()
|
|
muxer.Handle(FrpWebsocketPath, websocket.Handler(func(c *websocket.Conn) {
|
|
notifyCh := make(chan struct{})
|
|
conn := WrapCloseNotifyConn(c, func() {
|
|
close(notifyCh)
|
|
})
|
|
wl.acceptCh <- conn
|
|
<-notifyCh
|
|
}))
|
|
|
|
wl.server = &http.Server{
|
|
Addr: ln.Addr().String(),
|
|
Handler: muxer,
|
|
}
|
|
|
|
go func() {
|
|
_ = wl.server.Serve(ln)
|
|
}()
|
|
return
|
|
}
|
|
|
|
func ListenWebsocket(bindAddr string, bindPort int) (*WebsocketListener, error) {
|
|
tcpLn, err := net.Listen("tcp", net.JoinHostPort(bindAddr, strconv.Itoa(bindPort)))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
l := NewWebsocketListener(tcpLn)
|
|
return l, nil
|
|
}
|
|
|
|
func (p *WebsocketListener) Accept() (net.Conn, error) {
|
|
c, ok := <-p.acceptCh
|
|
if !ok {
|
|
return nil, ErrWebsocketListenerClosed
|
|
}
|
|
return c, nil
|
|
}
|
|
|
|
func (p *WebsocketListener) Close() error {
|
|
return p.server.Close()
|
|
}
|
|
|
|
func (p *WebsocketListener) Addr() net.Addr {
|
|
return p.ln.Addr()
|
|
}
|