proto/tcp: fix unexpected close function, fix #332

models/proto/tcp/tcp.go

@@ -27,23 +27,29 @@ func WithEncryption(rwc io.ReadWriteCloser, key []byte) (io.ReadWriteCloser, err
 	if err != nil {
 		return nil, err
 	}
-	return WrapReadWriteCloser(crypto.NewReader(rwc, key), w), nil
+	return WrapReadWriteCloser(crypto.NewReader(rwc, key), w, func() error {
+		return rwc.Close()
+	}), nil
 }
 
 func WithCompression(rwc io.ReadWriteCloser) io.ReadWriteCloser {
-	return WrapReadWriteCloser(snappy.NewReader(rwc), snappy.NewWriter(rwc))
-}
-
-func WrapReadWriteCloser(r io.Reader, w io.Writer) io.ReadWriteCloser {
-	return &ReadWriteCloser{
-		r: r,
-		w: w,
-	}
+	return WrapReadWriteCloser(snappy.NewReader(rwc), snappy.NewWriter(rwc), func() error {
+		return rwc.Close()
+	})
 }
 
 type ReadWriteCloser struct {
-	r io.Reader
-	w io.Writer
+	r       io.Reader
+	w       io.Writer
+	closeFn func() error
+}
+
+func WrapReadWriteCloser(r io.Reader, w io.Writer, closeFn func() error) io.ReadWriteCloser {
+	return &ReadWriteCloser{
+		r:       r,
+		w:       w,
+		closeFn: closeFn,
+	}
 }
 
 func (rwc *ReadWriteCloser) Read(p []byte) (n int, err error) {
@@ -69,5 +75,12 @@ func (rwc *ReadWriteCloser) Close() (errRet error) {
 			errRet = err
 		}
 	}
+
+	if rwc.closeFn != nil {
+		err = rwc.closeFn()
+		if err != nil {
+			errRet = err
+		}
+	}
 	return
 }