/
conn.go
79 lines (64 loc) · 1.78 KB
/
conn.go
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package portforward
import (
"errors"
"io"
"io/ioutil"
"net"
"time"
"github.com/go-logr/logr"
"k8s.io/apimachinery/pkg/util/httpstream"
"github.com/rusenask/k8s-portforward/pkg/recover"
)
// streamConn wraps a pair of SPDY streams and pretends to be a net.Conn
type streamConn struct {
log *logr.Logger
c httpstream.Connection
dataStream httpstream.Stream
errorStream httpstream.Stream
errch chan error
}
var _ net.Conn = (*streamConn)(nil)
func newStreamConn(log logr.Logger, c httpstream.Connection, dataStream, errorStream httpstream.Stream) *streamConn {
s := &streamConn{
log: &log,
errch: make(chan error, 1),
c: c,
dataStream: dataStream,
errorStream: errorStream,
}
go s.readErrorStream()
return s
}
func (s *streamConn) readErrorStream() {
defer recover.Panic(s.log)
message, err := ioutil.ReadAll(s.errorStream)
if err != nil {
s.errch <- err
} else if len(message) > 0 {
s.errch <- errors.New(string(message))
} else {
s.errch <- nil
}
close(s.errch)
}
func (s *streamConn) Read(b []byte) (int, error) {
n, err := s.dataStream.Read(b)
if err == io.EOF {
err = <-s.errch
if err == nil {
err = io.EOF
}
}
return n, err
}
func (s *streamConn) Write(b []byte) (int, error) {
return s.dataStream.Write(b)
}
func (s *streamConn) Close() error {
return s.c.Close()
}
func (s *streamConn) LocalAddr() net.Addr { return nil }
func (s *streamConn) RemoteAddr() net.Addr { return nil }
func (s *streamConn) SetDeadline(time.Time) error { return errors.New("not implemented") }
func (s *streamConn) SetReadDeadline(time.Time) error { return errors.New("not implemented") }
func (s *streamConn) SetWriteDeadline(time.Time) error { return errors.New("not implemented") }