update github.com/pires/go-proxyproto to v0.5.0

test/e2e/pkg/rpc/rpc.go

@@ -0,0 +1,35 @@
+package rpc
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/binary"
+	"errors"
+	"io"
+)
+
+func WriteBytes(w io.Writer, buf []byte) (int, error) {
+	out := bytes.NewBuffer(nil)
+	binary.Write(out, binary.BigEndian, int64(len(buf)))
+	out.Write(buf)
+	return w.Write(out.Bytes())
+}
+
+func ReadBytes(r io.Reader) ([]byte, error) {
+	// To compatible with UDP connection, use bufio reader here to avoid lost conent.
+	rd := bufio.NewReader(r)
+
+	var length int64
+	if err := binary.Read(rd, binary.BigEndian, &length); err != nil {
+		return nil, err
+	}
+	buffer := make([]byte, length)
+	n, err := io.ReadFull(rd, buffer)
+	if err != nil {
+		return nil, err
+	}
+	if int64(n) != length {
+		return nil, errors.New("invalid length")
+	}
+	return buffer, nil
+}