Beispiel #1
0
func (s *testServer) EmptyCall(ctx context.Context, in *testpb.Empty) (*testpb.Empty, error) {
	if _, ok := metadata.FromContext(ctx); ok {
		// For testing purpose, returns an error if there is attached metadata.
		return nil, grpc.Errorf(codes.DataLoss, "got extra metadata")
	}
	return new(testpb.Empty), nil
}
Beispiel #2
0
func (s *testServer) FullDuplexCall(stream testpb.TestService_FullDuplexCallServer) error {
	md, ok := metadata.FromContext(stream.Context())
	if ok {
		if err := stream.SendHeader(md); err != nil {
			grpclog.Fatalf("%v.SendHeader(%v) = %v, want %v", stream, md, err, nil)
		}
		stream.SetTrailer(md)
	}
	for {
		in, err := stream.Recv()
		if err == io.EOF {
			// read done.
			return nil
		}
		if err != nil {
			return err
		}
		cs := in.GetResponseParameters()
		for _, c := range cs {
			if us := c.GetIntervalUs(); us > 0 {
				time.Sleep(time.Duration(us) * time.Microsecond)
			}
			if err := stream.Send(&testpb.StreamingOutputCallResponse{
				Payload: newPayload(in.GetResponseType(), c.GetSize()),
			}); err != nil {
				return err
			}
		}
	}
}
Beispiel #3
0
func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
	md, ok := metadata.FromContext(ctx)
	if ok {
		if err := grpc.SendHeader(ctx, md); err != nil {
			grpclog.Fatalf("grpc.SendHeader(%v, %v) = %v, want %v", ctx, md, err, nil)
		}
		grpc.SetTrailer(ctx, md)
	}
	// Simulate some service delay.
	time.Sleep(2 * time.Millisecond)
	return &testpb.SimpleResponse{
		Payload: newPayload(in.GetResponseType(), in.GetResponseSize()),
	}, nil
}
Beispiel #4
0
func (s *testServer) StreamingOutputCall(args *testpb.StreamingOutputCallRequest, stream testpb.TestService_StreamingOutputCallServer) error {
	if _, ok := metadata.FromContext(stream.Context()); ok {
		// For testing purpose, returns an error if there is attached metadata.
		return grpc.Errorf(codes.DataLoss, "got extra metadata")
	}
	cs := args.GetResponseParameters()
	for _, c := range cs {
		if us := c.GetIntervalUs(); us > 0 {
			time.Sleep(time.Duration(us) * time.Microsecond)
		}
		if err := stream.Send(&testpb.StreamingOutputCallResponse{
			Payload: newPayload(args.GetResponseType(), c.GetSize()),
		}); err != nil {
			return err
		}
	}
	return nil
}
Beispiel #5
0
// NewStream creates a stream and register it into the transport as "active"
// streams.
func (t *http2Client) NewStream(ctx context.Context, callHdr *CallHdr) (_ *Stream, err error) {
	// Record the timeout value on the context.
	var timeout time.Duration
	if dl, ok := ctx.Deadline(); ok {
		timeout = dl.Sub(time.Now())
		if timeout <= 0 {
			return nil, ContextErr(context.DeadlineExceeded)
		}
	}
	authData := make(map[string]string)
	for _, c := range t.authCreds {
		data, err := c.GetRequestMetadata(ctx)
		if err != nil {
			return nil, StreamErrorf(codes.InvalidArgument, "transport: %v", err)
		}
		for k, v := range data {
			authData[k] = v
		}
	}
	if _, err := wait(ctx, t.shutdownChan, t.writableChan); err != nil {
		return nil, err
	}
	t.mu.Lock()
	if t.state != reachable {
		t.mu.Unlock()
		return nil, ErrConnClosing
	}
	if uint32(len(t.activeStreams)) >= t.maxStreams {
		t.mu.Unlock()
		t.writableChan <- 0
		return nil, StreamErrorf(codes.Unavailable, "transport: failed to create new stream because the limit has been reached.")
	}
	s := t.newStream(ctx, callHdr)
	t.activeStreams[s.id] = s
	t.mu.Unlock()
	// HPACK encodes various headers. Note that once WriteField(...) is
	// called, the corresponding headers/continuation frame has to be sent
	// because hpack.Encoder is stateful.
	t.hBuf.Reset()
	t.hEnc.WriteField(hpack.HeaderField{Name: ":method", Value: "POST"})
	t.hEnc.WriteField(hpack.HeaderField{Name: ":scheme", Value: t.scheme})
	t.hEnc.WriteField(hpack.HeaderField{Name: ":path", Value: callHdr.Method})
	t.hEnc.WriteField(hpack.HeaderField{Name: ":authority", Value: callHdr.Host})
	t.hEnc.WriteField(hpack.HeaderField{Name: "content-type", Value: "application/grpc"})
	t.hEnc.WriteField(hpack.HeaderField{Name: "te", Value: "trailers"})
	if timeout > 0 {
		t.hEnc.WriteField(hpack.HeaderField{Name: "grpc-timeout", Value: timeoutEncode(timeout)})
	}
	for k, v := range authData {
		t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: v})
	}
	var (
		hasMD      bool
		endHeaders bool
	)
	if md, ok := metadata.FromContext(ctx); ok {
		hasMD = true
		for k, v := range md {
			t.hEnc.WriteField(hpack.HeaderField{Name: k, Value: v})
		}
	}
	first := true
	// Sends the headers in a single batch even when they span multiple frames.
	for !endHeaders {
		size := t.hBuf.Len()
		if size > http2MaxFrameLen {
			size = http2MaxFrameLen
		} else {
			endHeaders = true
		}
		if first {
			// Sends a HeadersFrame to server to start a new stream.
			p := http2.HeadersFrameParam{
				StreamID:      s.id,
				BlockFragment: t.hBuf.Next(size),
				EndStream:     false,
				EndHeaders:    endHeaders,
			}
			// Do a force flush for the buffered frames iff it is the last headers frame
			// and there is header metadata to be sent. Otherwise, there is flushing until
			// the corresponding data frame is written.
			err = t.framer.writeHeaders(hasMD && endHeaders, p)
			first = false
		} else {
			// Sends Continuation frames for the leftover headers.
			err = t.framer.writeContinuation(hasMD && endHeaders, s.id, endHeaders, t.hBuf.Next(size))
		}
		if err != nil {
			t.notifyError(err)
			return nil, ConnectionErrorf("transport: %v", err)
		}
	}
	t.writableChan <- 0
	return s, nil
}