mirror of https://gitee.com/IrisVega/frp.git
106 lines
1.9 KiB
Go
106 lines
1.9 KiB
Go
package net
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import (
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"errors"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"time"
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"github.com/fatedier/frp/utils/log"
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"golang.org/x/net/websocket"
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)
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var (
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ErrWebsocketListenerClosed = errors.New("websocket listener closed")
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)
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const (
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FrpWebsocketPath = "/~!frp"
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)
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type WebsocketListener struct {
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net.Addr
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ln net.Listener
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accept chan Conn
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log.Logger
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server *http.Server
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httpMutex *http.ServeMux
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}
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// ln: tcp listener for websocket connections
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func NewWebsocketListener(ln net.Listener) (wl *WebsocketListener) {
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wl = &WebsocketListener{
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Addr: ln.Addr(),
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accept: make(chan Conn),
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Logger: log.NewPrefixLogger(""),
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}
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muxer := http.NewServeMux()
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muxer.Handle(FrpWebsocketPath, websocket.Handler(func(c *websocket.Conn) {
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notifyCh := make(chan struct{})
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conn := WrapCloseNotifyConn(c, func() {
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close(notifyCh)
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})
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wl.accept <- conn
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<-notifyCh
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}))
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wl.server = &http.Server{
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Addr: ln.Addr().String(),
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Handler: muxer,
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}
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go wl.server.Serve(ln)
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return
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}
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func ListenWebsocket(bindAddr string, bindPort int) (*WebsocketListener, error) {
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tcpLn, err := net.Listen("tcp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
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if err != nil {
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return nil, err
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}
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l := NewWebsocketListener(tcpLn)
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return l, nil
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}
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func (p *WebsocketListener) Accept() (Conn, error) {
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c, ok := <-p.accept
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if !ok {
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return nil, ErrWebsocketListenerClosed
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}
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return c, nil
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}
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func (p *WebsocketListener) Close() error {
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return p.server.Close()
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}
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// addr: domain:port
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func ConnectWebsocketServer(addr string) (Conn, error) {
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addr = "ws://" + addr + FrpWebsocketPath
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uri, err := url.Parse(addr)
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if err != nil {
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return nil, err
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}
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origin := "http://" + uri.Host
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cfg, err := websocket.NewConfig(addr, origin)
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if err != nil {
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return nil, err
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}
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cfg.Dialer = &net.Dialer{
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Timeout: 10 * time.Second,
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}
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conn, err := websocket.DialConfig(cfg)
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if err != nil {
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return nil, err
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}
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c := WrapConn(conn)
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return c, nil
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}
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