mirror of https://github.com/XTLS/Xray-core
125 lines
2.7 KiB
Go
125 lines
2.7 KiB
Go
package websocket
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import (
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"io"
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"net"
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"time"
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"github.com/gorilla/websocket"
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"github.com/xtls/xray-core/common/buf"
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"github.com/xtls/xray-core/common/errors"
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"github.com/xtls/xray-core/common/serial"
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)
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var _ buf.Writer = (*connection)(nil)
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// connection is a wrapper for net.Conn over WebSocket connection.
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// remoteAddr is used to pass "virtual" remote IP addresses in X-Forwarded-For.
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// so we shouldn't directly read it form conn.
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type connection struct {
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conn *websocket.Conn
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reader io.Reader
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remoteAddr net.Addr
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}
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func NewConnection(conn *websocket.Conn, remoteAddr net.Addr, extraReader io.Reader, heartbeatPeriod uint32) *connection {
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if heartbeatPeriod != 0 {
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go func() {
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for {
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time.Sleep(time.Duration(heartbeatPeriod) * time.Second)
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if err := conn.WriteControl(websocket.PingMessage, []byte{}, time.Time{}); err != nil {
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break
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}
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}
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}()
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}
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return &connection{
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conn: conn,
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remoteAddr: remoteAddr,
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reader: extraReader,
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}
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}
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// Read implements net.Conn.Read()
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func (c *connection) Read(b []byte) (int, error) {
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for {
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reader, err := c.getReader()
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if err != nil {
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return 0, err
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}
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nBytes, err := reader.Read(b)
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if errors.Cause(err) == io.EOF {
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c.reader = nil
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continue
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}
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return nBytes, err
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}
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}
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func (c *connection) getReader() (io.Reader, error) {
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if c.reader != nil {
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return c.reader, nil
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}
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_, reader, err := c.conn.NextReader()
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if err != nil {
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return nil, err
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}
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c.reader = reader
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return reader, nil
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}
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// Write implements io.Writer.
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func (c *connection) Write(b []byte) (int, error) {
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if err := c.conn.WriteMessage(websocket.BinaryMessage, b); err != nil {
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return 0, err
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}
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return len(b), nil
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}
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func (c *connection) WriteMultiBuffer(mb buf.MultiBuffer) error {
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mb = buf.Compact(mb)
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mb, err := buf.WriteMultiBuffer(c, mb)
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buf.ReleaseMulti(mb)
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return err
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}
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func (c *connection) Close() error {
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var errs []interface{}
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if err := c.conn.WriteControl(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, ""), time.Now().Add(time.Second*5)); err != nil {
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errs = append(errs, err)
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}
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if err := c.conn.Close(); err != nil {
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errs = append(errs, err)
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}
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if len(errs) > 0 {
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return errors.New("failed to close connection").Base(errors.New(serial.Concat(errs...)))
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}
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return nil
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}
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func (c *connection) LocalAddr() net.Addr {
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return c.conn.LocalAddr()
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}
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func (c *connection) RemoteAddr() net.Addr {
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return c.remoteAddr
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}
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func (c *connection) SetDeadline(t time.Time) error {
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if err := c.SetReadDeadline(t); err != nil {
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return err
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}
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return c.SetWriteDeadline(t)
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}
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func (c *connection) SetReadDeadline(t time.Time) error {
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return c.conn.SetReadDeadline(t)
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}
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func (c *connection) SetWriteDeadline(t time.Time) error {
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return c.conn.SetWriteDeadline(t)
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}
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