mirror of https://gitee.com/IrisVega/frp.git
128 lines
2.4 KiB
Go
128 lines
2.4 KiB
Go
package net
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import (
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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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"sync/atomic"
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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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type WebsocketListener struct {
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log.Logger
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server *http.Server
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httpMutex *http.ServeMux
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connChan chan *WebsocketConn
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closeFlag bool
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}
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func NewWebsocketListener(ln net.Listener,
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filter func(w http.ResponseWriter, r *http.Request) bool) (l *WebsocketListener, err error) {
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l = &WebsocketListener{
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httpMutex: http.NewServeMux(),
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connChan: make(chan *WebsocketConn),
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Logger: log.NewPrefixLogger(""),
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}
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l.httpMutex.Handle("/", websocket.Handler(func(c *websocket.Conn) {
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conn := NewWebScoketConn(c)
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l.connChan <- conn
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conn.waitClose()
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}))
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l.server = &http.Server{
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Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if filter != nil && !filter(w, r) {
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return
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}
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l.httpMutex.ServeHTTP(w, r)
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}),
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}
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ch := make(chan struct{})
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go func() {
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close(ch)
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err = l.server.Serve(ln)
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}()
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<-ch
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<-time.After(time.Millisecond)
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return
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}
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func ListenWebsocket(bindAddr string, bindPort int) (l *WebsocketListener, err error) {
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ln, err := net.Listen("tcp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
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if err != nil {
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return
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}
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l, err = NewWebsocketListener(ln, nil)
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return
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}
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func (p *WebsocketListener) Accept() (Conn, error) {
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c := <-p.connChan
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return c, nil
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}
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func (p *WebsocketListener) Close() error {
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if !p.closeFlag {
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p.closeFlag = true
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p.server.Close()
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}
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return nil
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}
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type WebsocketConn struct {
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net.Conn
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log.Logger
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closed int32
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wait chan struct{}
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}
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func NewWebScoketConn(conn net.Conn) (c *WebsocketConn) {
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c = &WebsocketConn{
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Conn: conn,
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Logger: log.NewPrefixLogger(""),
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wait: make(chan struct{}),
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}
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return
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}
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func (p *WebsocketConn) Close() error {
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if atomic.SwapInt32(&p.closed, 1) == 1 {
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return nil
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}
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close(p.wait)
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return p.Conn.Close()
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}
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func (p *WebsocketConn) waitClose() {
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<-p.wait
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}
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// ConnectWebsocketServer :
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// addr: ws://domain:port
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func ConnectWebsocketServer(addr string) (c Conn, err error) {
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addr = "ws://" + addr
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uri, err := url.Parse(addr)
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if err != nil {
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return
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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
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}
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cfg.Dialer = &net.Dialer{
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Timeout: time.Second * 10,
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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
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}
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c = NewWebScoketConn(conn)
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return
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}
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