feat: add method to acknowledge expected read errors

conn.go

@@ -1007,8 +1007,9 @@ func (c *Conn) handleProtocolError(message string) error {
 //
 // Applications must break out of the application's read loop when this method
 // returns a non-nil error value. Errors returned from this method are
-// permanent. Once this method returns a non-nil error, all subsequent calls to
-// this method return the same error.
+// permanent, unless explicitly cleared using ClearReadError. Once this method
+// returns a non-nil error, all subsequent calls to this method return the
+// same error.
 func (c *Conn) NextReader() (messageType int, r io.Reader, err error) {
  // Close previous reader, only relevant for decompression.
  if c.reader != nil {
@@ -1047,6 +1048,15 @@ func (c *Conn) NextReader() (messageType int, r io.Reader, err error) {
  return noFrame, nil, c.readErr
 }
 
+// ClearReadError clears the read error state of the connection. This is
+// primarily useful for handling expected errors such as read timeouts with
+// non-blocking I/O. Applications must be careful to ensure errors are
+// temporary before clearing them as not doing so will lead to busy loops.
+func (c *Conn) ClearReadError() {
+ c.readErr = nil
+ c.readErrCount--
+}
+
 type messageReader struct{ c *Conn }
 
 func (r *messageReader) Read(b []byte) (int, error) {