| // |
| // Copyright 2017 gRPC authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #include <new> |
| |
| #include "absl/status/status.h" |
| #include "absl/types/optional.h" |
| #include "gtest/gtest.h" |
| |
| #include <grpc/impl/channel_arg_names.h> |
| #include <grpc/status.h> |
| |
| #include "src/core/lib/channel/channel_args.h" |
| #include "src/core/lib/channel/channel_fwd.h" |
| #include "src/core/lib/channel/channel_stack.h" |
| #include "src/core/lib/channel/channel_stack_builder.h" |
| #include "src/core/lib/config/core_configuration.h" |
| #include "src/core/lib/gprpp/status_helper.h" |
| #include "src/core/lib/gprpp/time.h" |
| #include "src/core/lib/iomgr/call_combiner.h" |
| #include "src/core/lib/iomgr/closure.h" |
| #include "src/core/lib/iomgr/error.h" |
| #include "src/core/lib/surface/channel_init.h" |
| #include "src/core/lib/surface/channel_stack_type.h" |
| #include "src/core/lib/transport/metadata_batch.h" |
| #include "src/core/lib/transport/transport.h" |
| #include "test/core/end2end/end2end_tests.h" |
| |
| namespace grpc_core { |
| namespace { |
| |
| // A filter that, for the first call it sees, will fail all batches except |
| // for cancellations, so that the call fails with an error whose |
| // StreamNetworkState is kNotSeenByServer. |
| // All subsequent calls are allowed through without failures. |
| class FailFirstCallFilter { |
| public: |
| static grpc_channel_filter kFilterVtable; |
| |
| private: |
| class CallData { |
| public: |
| static grpc_error_handle Init(grpc_call_element* elem, |
| const grpc_call_element_args* args) { |
| new (elem->call_data) CallData(args); |
| return absl::OkStatus(); |
| } |
| |
| static void Destroy(grpc_call_element* elem, |
| const grpc_call_final_info* /*final_info*/, |
| grpc_closure* /*ignored*/) { |
| auto* calld = static_cast<CallData*>(elem->call_data); |
| calld->~CallData(); |
| } |
| |
| static void StartTransportStreamOpBatch( |
| grpc_call_element* elem, grpc_transport_stream_op_batch* batch) { |
| auto* chand = static_cast<FailFirstCallFilter*>(elem->channel_data); |
| auto* calld = static_cast<CallData*>(elem->call_data); |
| if (!chand->seen_call_) { |
| calld->fail_ = true; |
| chand->seen_call_ = true; |
| } |
| if (calld->fail_) { |
| if (batch->recv_trailing_metadata) { |
| batch->payload->recv_trailing_metadata.recv_trailing_metadata->Set( |
| GrpcStreamNetworkState(), |
| GrpcStreamNetworkState::kNotSeenByServer); |
| } |
| if (!batch->cancel_stream) { |
| grpc_transport_stream_op_batch_finish_with_failure( |
| batch, |
| grpc_error_set_int( |
| GRPC_ERROR_CREATE("FailFirstCallFilter failing batch"), |
| StatusIntProperty::kRpcStatus, GRPC_STATUS_UNAVAILABLE), |
| calld->call_combiner_); |
| return; |
| } |
| } |
| grpc_call_next_op(elem, batch); |
| } |
| |
| private: |
| explicit CallData(const grpc_call_element_args* args) |
| : call_combiner_(args->call_combiner) {} |
| |
| CallCombiner* call_combiner_; |
| bool fail_ = false; |
| }; |
| |
| static grpc_error_handle Init(grpc_channel_element* elem, |
| grpc_channel_element_args* /*args*/) { |
| new (elem->channel_data) FailFirstCallFilter(); |
| return absl::OkStatus(); |
| } |
| |
| static void Destroy(grpc_channel_element* elem) { |
| auto* chand = static_cast<FailFirstCallFilter*>(elem->channel_data); |
| chand->~FailFirstCallFilter(); |
| } |
| |
| bool seen_call_ = false; |
| }; |
| |
| grpc_channel_filter FailFirstCallFilter::kFilterVtable = { |
| CallData::StartTransportStreamOpBatch, |
| nullptr, |
| grpc_channel_next_op, |
| sizeof(CallData), |
| CallData::Init, |
| grpc_call_stack_ignore_set_pollset_or_pollset_set, |
| CallData::Destroy, |
| sizeof(FailFirstCallFilter), |
| Init, |
| grpc_channel_stack_no_post_init, |
| Destroy, |
| grpc_channel_next_get_info, |
| "FailFirstCallFilter", |
| }; |
| |
| // Tests transparent retries when the call was never sent out on the wire. |
| CORE_END2END_TEST(RetryTest, TransparentGoaway) { |
| CoreConfiguration::RegisterBuilder([](CoreConfiguration::Builder* builder) { |
| builder->channel_init()->RegisterStage( |
| GRPC_CLIENT_SUBCHANNEL, GRPC_CHANNEL_INIT_BUILTIN_PRIORITY + 1, |
| [](ChannelStackBuilder* builder) { |
| // Skip on proxy (which explicitly disables retries). |
| if (!builder->channel_args() |
| .GetBool(GRPC_ARG_ENABLE_RETRIES) |
| .value_or(true)) { |
| return true; |
| } |
| // Install filter. |
| builder->PrependFilter(&FailFirstCallFilter::kFilterVtable); |
| return true; |
| }); |
| }); |
| auto c = |
| NewClientCall("/service/method").Timeout(Duration::Minutes(1)).Create(); |
| EXPECT_NE(c.GetPeer(), absl::nullopt); |
| // Start a batch containing send ops. |
| c.NewBatch(1) |
| .SendInitialMetadata({}) |
| .SendMessage("foo") |
| .SendCloseFromClient(); |
| // Start a batch containing recv ops. |
| CoreEnd2endTest::IncomingStatusOnClient server_status; |
| CoreEnd2endTest::IncomingMetadata server_initial_metadata; |
| CoreEnd2endTest::IncomingMessage server_message; |
| c.NewBatch(2) |
| .RecvInitialMetadata(server_initial_metadata) |
| .RecvMessage(server_message) |
| .RecvStatusOnClient(server_status); |
| // Client send ops should now complete. |
| Expect(1, true); |
| Step(); |
| // Server should get a call. |
| auto s = RequestCall(101); |
| Expect(101, true); |
| Step(); |
| // Server receives the request. |
| CoreEnd2endTest::IncomingMessage client_message; |
| s.NewBatch(102).RecvMessage(client_message); |
| Expect(102, true); |
| Step(); |
| // Server sends a response with status OK. |
| CoreEnd2endTest::IncomingCloseOnServer client_close; |
| s.NewBatch(103) |
| .RecvCloseOnServer(client_close) |
| .SendInitialMetadata({}) |
| .SendMessage("bar") |
| .SendStatusFromServer(GRPC_STATUS_OK, "xyz", {}); |
| // In principle, the server batch should complete before the client |
| // recv ops batch, but in the proxy fixtures, there are multiple threads |
| // involved, so the completion order tends to be a little racy. |
| Expect(103, true); |
| Expect(2, true); |
| Step(); |
| EXPECT_EQ(server_status.status(), GRPC_STATUS_OK); |
| EXPECT_EQ(server_status.message(), "xyz"); |
| EXPECT_EQ(s.method(), "/service/method"); |
| EXPECT_FALSE(client_close.was_cancelled()); |
| EXPECT_EQ(server_message.payload(), "bar"); |
| EXPECT_EQ(client_message.payload(), "foo"); |
| // Make sure the "grpc-previous-rpc-attempts" header was NOT sent, since |
| // we don't do that for transparent retries. |
| EXPECT_EQ(s.GetInitialMetadata("grpc-previous-rpc-attempts"), absl::nullopt); |
| } |
| |
| } // namespace |
| } // namespace grpc_core |