Avoid creating transport stream error outside of transport

call.go

@@ -96,7 +96,7 @@ func sendRequest(ctx context.Context, codec Codec, compressor Compressor, callHd
 	}
 	outBuf, err := encode(codec, args, compressor, cbuf)
 	if err != nil {
-		return nil, transport.StreamErrorf(codes.Internal, "grpc: %v", err)
+		return nil, Errorf(codes.Internal, "grpc: %v", err)
 	}
 	err = t.Write(stream, outBuf, opts)
 	// t.NewStream(...) could lead to an early rejection of the RPC (e.g., the service/method

rpc_util.go

@@ -303,10 +303,10 @@ func checkRecvPayload(pf payloadFormat, recvCompress string, dc Decompressor) er
 	case compressionNone:
 	case compressionMade:
 		if dc == nil || recvCompress != dc.Type() {
-			return transport.StreamErrorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
+			return Errorf(codes.Unimplemented, "grpc: Decompressor is not installed for grpc-encoding %q", recvCompress)
 		}
 	default:
-		return transport.StreamErrorf(codes.Internal, "grpc: received unexpected payload format %d", pf)
+		return Errorf(codes.Internal, "grpc: received unexpected payload format %d", pf)
 	}
 	return nil
 }

server.go

@@ -547,7 +547,7 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 			return err
 		}
 		if err == io.ErrUnexpectedEOF {
-			err = transport.StreamError{Code: codes.Internal, Desc: "io.ErrUnexpectedEOF"}
+			err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
 		}
 		if err != nil {
 			switch err := err.(type) {
@@ -569,8 +569,8 @@ func (s *Server) processUnaryRPC(t transport.ServerTransport, stream *transport.
 
 		if err := checkRecvPayload(pf, stream.RecvCompress(), s.opts.dc); err != nil {
 			switch err := err.(type) {
-			case transport.StreamError:
-				if err := t.WriteStatus(stream, err.Code, err.Desc); err != nil {
+			case *rpcError:
+				if err := t.WriteStatus(stream, err.code, err.desc); err != nil {
 					grpclog.Printf("grpc: Server.processUnaryRPC failed to write status %v", err)
 				}
 			default:

stream.go

@@ -296,7 +296,7 @@ func (cs *clientStream) SendMsg(m interface{}) (err error) {
 		}
 	}()
 	if err != nil {
-		return transport.StreamErrorf(codes.Internal, "grpc: %v", err)
+		return Errorf(codes.Internal, "grpc: %v", err)
 	}
 	return cs.t.Write(cs.s, out, &transport.Options{Last: false})
 }
@@ -468,10 +468,13 @@ func (ss *serverStream) SendMsg(m interface{}) (err error) {
 		}
 	}()
 	if err != nil {
-		err = transport.StreamErrorf(codes.Internal, "grpc: %v", err)
+		err = Errorf(codes.Internal, "grpc: %v", err)
 		return err
 	}
-	return ss.t.Write(ss.s, out, &transport.Options{Last: false})
+	if err := ss.t.Write(ss.s, out, &transport.Options{Last: false}); err != nil {
+		return toRPCErr(err)
+	}
+	return nil
 }
 
 func (ss *serverStream) RecvMsg(m interface{}) (err error) {
@@ -489,5 +492,14 @@ func (ss *serverStream) RecvMsg(m interface{}) (err error) {
 			ss.mu.Unlock()
 		}
 	}()
-	return recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize)
+	if err := recv(ss.p, ss.codec, ss.s, ss.dc, m, ss.maxMsgSize); err != nil {
+		if err == io.EOF {
+			return err
+		}
+		if err == io.ErrUnexpectedEOF {
+			err = Errorf(codes.Internal, io.ErrUnexpectedEOF.Error())
+		}
+		return toRPCErr(err)
+	}
+	return nil
 }

test/end2end_test.go

@@ -66,7 +66,6 @@ import (
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
 	testpb "google.golang.org/grpc/test/grpc_testing"
-	"google.golang.org/grpc/transport"
 )
 
 var (
@@ -2280,8 +2279,8 @@ func testClientRequestBodyErrorCancelStreamingInput(t *testing.T, e env) {
 		case <-time.After(3 * time.Second):
 			t.Fatal("timeout waiting for error")
 		}
-		if se, ok := got.(transport.StreamError); !ok || se.Code != codes.Canceled {
-			t.Errorf("error = %#v; want transport.StreamError with code Canceled", got)
+		if grpc.Code(got) != codes.Canceled {
+			t.Errorf("error = %#v; want error code %s", got, codes.Canceled)
 		}
 	})
 }