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/*
*
* Copyright 2018 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 <grpc/grpc.h>
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include <grpcpp/channel.h>
#include <grpcpp/client_context.h>
#include <grpcpp/create_channel.h>
#include <grpcpp/security/credentials.h>
#include <grpcpp/security/server_credentials.h>
#include <grpcpp/server.h>
#include <grpcpp/server_builder.h>
#include <grpcpp/server_context.h>
#include "src/proto/grpc/testing/echo.grpc.pb.h"
#include "test/core/util/port.h"
#include "test/core/util/test_config.h"
#include "test/cpp/util/string_ref_helper.h"
#include <gtest/gtest.h>
namespace grpc {
namespace testing {
namespace {
const char kServerReturnStatusCode[] = "server_return_status_code";
const char kServerDelayBeforeReturnUs[] = "server_delay_before_return_us";
const char kServerReturnAfterNReads[] = "server_return_after_n_reads";
class TestServiceImpl : public ::grpc::testing::EchoTestService::Service {
public:
// Unused methods are not implemented.
Status RequestStream(ServerContext* context,
ServerReader<EchoRequest>* reader,
EchoResponse* response) override {
int server_return_status_code =
GetIntValueFromMetadata(context, kServerReturnStatusCode, 0);
int server_delay_before_return_us =
GetIntValueFromMetadata(context, kServerDelayBeforeReturnUs, 0);
int server_return_after_n_reads =
GetIntValueFromMetadata(context, kServerReturnAfterNReads, 0);
EchoRequest request;
while (server_return_after_n_reads--) {
EXPECT_TRUE(reader->Read(&request));
}
response->set_message("response msg");
gpr_sleep_until(gpr_time_add(
gpr_now(GPR_CLOCK_MONOTONIC),
gpr_time_from_micros(server_delay_before_return_us, GPR_TIMESPAN)));
return Status(static_cast<StatusCode>(server_return_status_code), "");
}
Status BidiStream(
ServerContext* context,
ServerReaderWriter<EchoResponse, EchoRequest>* stream) override {
int server_return_status_code =
GetIntValueFromMetadata(context, kServerReturnStatusCode, 0);
int server_delay_before_return_us =
GetIntValueFromMetadata(context, kServerDelayBeforeReturnUs, 0);
int server_return_after_n_reads =
GetIntValueFromMetadata(context, kServerReturnAfterNReads, 0);
EchoRequest request;
EchoResponse response;
while (server_return_after_n_reads--) {
EXPECT_TRUE(stream->Read(&request));
response.set_message(request.message());
EXPECT_TRUE(stream->Write(response));
}
gpr_sleep_until(gpr_time_add(
gpr_now(GPR_CLOCK_MONOTONIC),
gpr_time_from_micros(server_delay_before_return_us, GPR_TIMESPAN)));
return Status(static_cast<StatusCode>(server_return_status_code), "");
}
int GetIntValueFromMetadata(ServerContext* context, const char* key,
int default_value) {
auto metadata = context->client_metadata();
if (metadata.find(key) != metadata.end()) {
std::istringstream iss(ToString(metadata.find(key)->second));
iss >> default_value;
}
return default_value;
}
};
class ServerEarlyReturnTest : public ::testing::Test {
protected:
ServerEarlyReturnTest() : picked_port_(0) {}
void SetUp() override {
int port = grpc_pick_unused_port_or_die();
picked_port_ = port;
server_address_ << "127.0.0.1:" << port;
ServerBuilder builder;
builder.AddListeningPort(server_address_.str(),
InsecureServerCredentials());
builder.RegisterService(&service_);
server_ = builder.BuildAndStart();
channel_ =
CreateChannel(server_address_.str(), InsecureChannelCredentials());
stub_ = grpc::testing::EchoTestService::NewStub(channel_);
}
void TearDown() override {
server_->Shutdown();
if (picked_port_ > 0) {
grpc_recycle_unused_port(picked_port_);
}
}
// Client sends 20 requests and the server returns after reading 10 requests.
// If return_cancel is true, server returns CANCELLED status. Otherwise it
// returns OK.
void DoBidiStream(bool return_cancelled) {
EchoRequest request;
EchoResponse response;
ClientContext context;
context.AddMetadata(kServerReturnAfterNReads, "10");
if (return_cancelled) {
// "1" means CANCELLED
context.AddMetadata(kServerReturnStatusCode, "1");
}
context.AddMetadata(kServerDelayBeforeReturnUs, "10000");
auto stream = stub_->BidiStream(&context);
for (int i = 0; i < 20; i++) {
request.set_message(grpc::string("hello") + grpc::to_string(i));
bool write_ok = stream->Write(request);
bool read_ok = stream->Read(&response);
if (i < 10) {
EXPECT_TRUE(write_ok);
EXPECT_TRUE(read_ok);
EXPECT_EQ(response.message(), request.message());
} else {
EXPECT_FALSE(read_ok);
}
}
stream->WritesDone();
EXPECT_FALSE(stream->Read(&response));
Status s = stream->Finish();
if (return_cancelled) {
EXPECT_EQ(s.error_code(), StatusCode::CANCELLED);
} else {
EXPECT_TRUE(s.ok());
}
}
void DoRequestStream(bool return_cancelled) {
EchoRequest request;
EchoResponse response;
ClientContext context;
context.AddMetadata(kServerReturnAfterNReads, "10");
if (return_cancelled) {
// "1" means CANCELLED
context.AddMetadata(kServerReturnStatusCode, "1");
}
context.AddMetadata(kServerDelayBeforeReturnUs, "10000");
auto stream = stub_->RequestStream(&context, &response);
for (int i = 0; i < 20; i++) {
request.set_message(grpc::string("hello") + grpc::to_string(i));
bool written = stream->Write(request);
if (i < 10) {
EXPECT_TRUE(written);
}
}
stream->WritesDone();
Status s = stream->Finish();
if (return_cancelled) {
EXPECT_EQ(s.error_code(), StatusCode::CANCELLED);
} else {
EXPECT_TRUE(s.ok());
}
}
std::shared_ptr<Channel> channel_;
std::unique_ptr<grpc::testing::EchoTestService::Stub> stub_;
std::unique_ptr<Server> server_;
std::ostringstream server_address_;
TestServiceImpl service_;
int picked_port_;
};
TEST_F(ServerEarlyReturnTest, BidiStreamEarlyOk) { DoBidiStream(false); }
TEST_F(ServerEarlyReturnTest, BidiStreamEarlyCancel) { DoBidiStream(true); }
TEST_F(ServerEarlyReturnTest, RequestStreamEarlyOK) { DoRequestStream(false); }
TEST_F(ServerEarlyReturnTest, RequestStreamEarlyCancel) {
DoRequestStream(true);
}
} // namespace
} // namespace testing
} // namespace grpc
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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