fix #244 use BinaryAsStringExtension to make []byte pretty, while the output is valid json, but it can not be decoded by other json codec, as \x01 is decoded as \x01 by them, which is not original input

stream.go

@@ -55,6 +55,11 @@ func (stream *Stream) Buffer() []byte {
 	return stream.buf
 }
 
+// SetBuffer allows to append to the internal buffer directly
+func (stream *Stream) SetBuffer(buf []byte) {
+	stream.buf = buf
+}
+
 // Write writes the contents of p into the buffer.
 // It returns the number of bytes written.
 // If nn < len(p), it also returns an error explaining