add tls and ws listener

server/listener/ws/listener.go

@@ -0,0 +1,173 @@
+package tcp
+
+import (
+	"crypto/tls"
+	"errors"
+	"net"
+	"net/http"
+	"time"
+
+	"github.com/go-gost/gost/logger"
+	"github.com/go-gost/gost/server/listener"
+	"github.com/go-gost/gost/utils"
+	"github.com/gorilla/websocket"
+)
+
+var (
+	_ listener.Listener = (*Listener)(nil)
+)
+
+type Listener struct {
+	md       metadata
+	addr     net.Addr
+	upgrader *websocket.Upgrader
+	srv      *http.Server
+	connChan chan net.Conn
+	errChan  chan error
+	logger   logger.Logger
+}
+
+func NewListener(opts ...listener.Option) *Listener {
+	options := &listener.Options{}
+	for _, opt := range opts {
+		opt(options)
+	}
+	return &Listener{
+		logger: options.Logger,
+	}
+}
+
+func (l *Listener) Init(md listener.Metadata) (err error) {
+	l.md, err = l.parseMetadata(md)
+	if err != nil {
+		return
+	}
+
+	l.upgrader = &websocket.Upgrader{
+		HandshakeTimeout:  l.md.handshakeTimeout,
+		ReadBufferSize:    l.md.readBufferSize,
+		WriteBufferSize:   l.md.writeBufferSize,
+		CheckOrigin:       func(r *http.Request) bool { return true },
+		EnableCompression: l.md.enableCompression,
+	}
+
+	path := l.md.path
+	if path == "" {
+		path = defaultPath
+	}
+	mux := http.NewServeMux()
+	mux.Handle(path, http.HandlerFunc(l.upgrade))
+	l.srv = &http.Server{
+		Addr:              l.md.addr,
+		TLSConfig:         l.md.tlsConfig,
+		Handler:           mux,
+		ReadHeaderTimeout: l.md.readHeaderTimeout,
+	}
+
+	queueSize := l.md.connQueueSize
+	if queueSize <= 0 {
+		queueSize = defaultQueueSize
+	}
+	l.connChan = make(chan net.Conn, queueSize)
+	l.errChan = make(chan error, 1)
+
+	ln, err := net.Listen("tcp", l.md.addr)
+	if err != nil {
+		return
+	}
+	if l.md.tlsConfig != nil {
+		ln = tls.NewListener(ln, l.md.tlsConfig)
+	}
+
+	l.addr = ln.Addr()
+
+	go func() {
+		err := l.srv.Serve(ln)
+		if err != nil {
+			l.errChan <- err
+		}
+		close(l.errChan)
+	}()
+
+	select {
+	case err = <-l.errChan:
+		return
+	case <-time.After(100 * time.Millisecond):
+	}
+
+	return
+}
+
+func (l *Listener) Accept() (conn net.Conn, err error) {
+	select {
+	case conn = <-l.connChan:
+	case err = <-l.errChan:
+	}
+	return
+}
+
+func (l *Listener) Close() error {
+	return l.srv.Close()
+}
+
+func (l *Listener) Addr() net.Addr {
+	return l.addr
+}
+
+func (l *Listener) parseMetadata(md listener.Metadata) (m metadata, err error) {
+	if val, ok := md[addr]; ok {
+		m.addr = val
+	} else {
+		err = errors.New("missing address")
+		return
+	}
+
+	m.tlsConfig, err = utils.LoadTLSConfig(md[certFile], md[keyFile], md[caFile])
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+func (l *Listener) upgrade(w http.ResponseWriter, r *http.Request) {
+	conn, err := l.upgrader.Upgrade(w, r, l.md.responseHeader)
+	if err != nil {
+		l.logger.Error(err)
+		return
+	}
+
+	select {
+	case l.connChan <- &websocketConn{Conn: conn}:
+	default:
+		conn.Close()
+		l.logger.Warn("connection queue is full")
+	}
+}
+
+type websocketConn struct {
+	*websocket.Conn
+	rb []byte
+}
+
+func (c *websocketConn) Read(b []byte) (n int, err error) {
+	if len(c.rb) == 0 {
+		_, c.rb, err = c.ReadMessage()
+	}
+	n = copy(b, c.rb)
+	c.rb = c.rb[n:]
+	return
+}
+
+func (c *websocketConn) Write(b []byte) (n int, err error) {
+	err = c.WriteMessage(websocket.BinaryMessage, b)
+	n = len(b)
+	return
+}
+
+func (c *websocketConn) SetDeadline(t time.Time) error {
+	if err := c.SetReadDeadline(t); err != nil {
+		return err
+	}
+	return c.SetWriteDeadline(t)
+}

server/listener/ws/metadata.go

@@ -0,0 +1,40 @@
+package tcp
+
+import (
+	"crypto/tls"
+	"net/http"
+	"time"
+)
+
+const (
+	addr              = "addr"
+	path              = "path"
+	certFile          = "certFile"
+	keyFile           = "keyFile"
+	caFile            = "caFile"
+	handshakeTimeout  = "handshakeTimeout"
+	readHeaderTimeout = "readHeaderTimeout"
+	readBufferSize    = "readBufferSize"
+	writeBufferSize   = "writeBufferSize"
+	enableCompression = "enableCompression"
+	responseHeader    = "responseHeader"
+	connQueueSize     = "connQueueSize"
+)
+
+const (
+	defaultPath      = "/ws"
+	defaultQueueSize = 128
+)
+
+type metadata struct {
+	addr              string
+	path              string
+	tlsConfig         *tls.Config
+	handshakeTimeout  time.Duration
+	readHeaderTimeout time.Duration
+	readBufferSize    int
+	writeBufferSize   int
+	enableCompression bool
+	responseHeader    http.Header
+	connQueueSize     int
+}