Websockets support

pkg/web/websocket.go

@@ -0,0 +1,67 @@
+// Copyright (c) 2018 The Grumble Authors
+// The use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE-file.
+
+package web
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+type conn struct {
+	ws     *websocket.Conn
+	msgbuf bytes.Buffer
+}
+
+func (c *conn) Read(b []byte) (n int, err error) {
+	if c.msgbuf.Len() == 0 {
+		_, r, err := c.ws.NextReader()
+		if err != nil {
+			if _, ok := err.(*websocket.CloseError); ok {
+				return 0, io.EOF
+			}
+			return 0, err
+		}
+		if _, err := c.msgbuf.ReadFrom(r); err != nil {
+			return 0, err
+		}
+	}
+	// Impossible to read over message boundaries - will generate EOF
+	return c.msgbuf.Read(b)
+}
+
+func (c *conn) Write(b []byte) (n int, err error) {
+	return len(b), c.ws.WriteMessage(websocket.BinaryMessage, b)
+}
+
+func (c *conn) Close() error {
+	return c.ws.Close()
+}
+
+func (c *conn) LocalAddr() net.Addr {
+	return c.ws.LocalAddr()
+}
+
+func (c *conn) RemoteAddr() net.Addr {
+	return c.ws.RemoteAddr()
+}
+
+func (c *conn) SetDeadline(t time.Time) (err error) {
+	if err = c.ws.SetReadDeadline(t); err != nil {
+		return err
+	}
+	return c.ws.SetWriteDeadline(t)
+}
+
+func (c *conn) SetReadDeadline(t time.Time) error {
+	return c.ws.SetReadDeadline(t)
+}
+
+func (c *conn) SetWriteDeadline(t time.Time) error {
+	return c.ws.SetWriteDeadline(t)
+}