http2: add Framer.ErrorDetail method
Change-Id: Ida47c3feab7bfb0f12bf832953e16d167e6547dd
Reviewed-on: https://go-review.googlesource.com/19917
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/http2/frame.go b/http2/frame.go
index f359d99..6943f93 100644
--- a/http2/frame.go
+++ b/http2/frame.go
@@ -424,6 +424,17 @@
fr.maxReadSize = v
}
+// ErrorDetail returns a more detailed error of the last error
+// returned by Framer.ReadFrame. For instance, if ReadFrame
+// returns a StreamError with code PROTOCOL_ERROR, ErrorDetail
+// will say exactly what was invalid. ErrorDetail is not guaranteed
+// to return a non-nil value and like the rest of the http2 package,
+// its return value is not protected by an API compatibility promise.
+// ErrorDetail is reset after the next call to ReadFrame.
+func (fr *Framer) ErrorDetail() error {
+ return fr.errDetail
+}
+
// ErrFrameTooLarge is returned from Framer.ReadFrame when the peer
// sends a frame that is larger than declared with SetMaxReadFrameSize.
var ErrFrameTooLarge = errors.New("http2: frame too large")
