diff --git a/common/bufio/only.go b/common/bufio/only.go
new file mode 100644
index 0000000..e757c45
--- /dev/null
+++ b/common/bufio/only.go
@@ -0,0 +1,95 @@
+package bufio
+
+import (
+	"io"
+	"net"
+	"time"
+)
+
+type ReadOnlyConn struct {
+	reader io.Reader
+}
+
+func NewReadOnlyConn(reader io.Reader) net.Conn {
+	return &ReadOnlyConn{reader}
+}
+
+func (c *ReadOnlyConn) Read(b []byte) (n int, err error) {
+	return c.reader.Read(b)
+}
+
+func (c *ReadOnlyConn) Write(b []byte) (n int, err error) {
+	return 0, io.ErrClosedPipe
+}
+
+func (c *ReadOnlyConn) Close() error {
+	return nil
+}
+
+func (c *ReadOnlyConn) LocalAddr() net.Addr {
+	return nil
+}
+
+func (c *ReadOnlyConn) RemoteAddr() net.Addr {
+	return nil
+}
+
+func (c *ReadOnlyConn) SetDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *ReadOnlyConn) SetWriteDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *ReadOnlyConn) SetReadDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *ReadOnlyConn) Upstream() any {
+	return c.reader
+}
+
+type WriteOnlyConn struct {
+	writer io.Writer
+}
+
+func NewWriteOnlyConn(writer io.Writer) net.Conn {
+	return &WriteOnlyConn{writer}
+}
+
+func (c *WriteOnlyConn) Read(b []byte) (n int, err error) {
+	return 0, io.ErrClosedPipe
+}
+
+func (c *WriteOnlyConn) Write(b []byte) (n int, err error) {
+	return c.writer.Write(b)
+}
+
+func (c *WriteOnlyConn) Close() error {
+	return nil
+}
+
+func (c *WriteOnlyConn) LocalAddr() net.Addr {
+	return nil
+}
+
+func (c *WriteOnlyConn) RemoteAddr() net.Addr {
+	return nil
+}
+
+func (c *WriteOnlyConn) SetDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *WriteOnlyConn) SetWriteDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *WriteOnlyConn) SetReadDeadline(t time.Time) error {
+	return nil
+}
+
+func (c *WriteOnlyConn) Upstream() any {
+	return c.writer
+}