Merge pull request #2 from mpl/master

Catch and report non HTTP/2 error case
go4org · Feb 4, 2017 · 4d918e3 · 4d918e3
2 parents 188a132 + 7206c86
commit 4d918e3
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/call.go b/call.go
@@ -199,6 +199,9 @@ func (cc *ClientConn) invoke(ctx context.Context, method string, args, reply int
 	}
 	defer res.Body.Close()
 
+	if !res.ProtoAtLeast(2, 0) {
+		return Errorf(codes.Internal, "grpc: HTTP/2 required; response was %v", res.Proto)
+	}
 	if res.StatusCode != 200 {
 		return Errorf(codes.Internal, "grpc: unexpected status code %v", res.Status)
 	}