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Diffstat (limited to 'examples/cpp/metadata/greeter_server.cc')
-rw-r--r-- | examples/cpp/metadata/greeter_server.cc | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/examples/cpp/metadata/greeter_server.cc b/examples/cpp/metadata/greeter_server.cc new file mode 100644 index 0000000000..a9a4f33cb0 --- /dev/null +++ b/examples/cpp/metadata/greeter_server.cc @@ -0,0 +1,94 @@ +/* + * + * Copyright 2015 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 <iostream> +#include <memory> +#include <string> + +#include <grpcpp/grpcpp.h> + +#ifdef BAZEL_BUILD +#include "examples/protos/helloworld.grpc.pb.h" +#else +#include "helloworld.grpc.pb.h" +#endif + +using grpc::Server; +using grpc::ServerBuilder; +using grpc::ServerContext; +using grpc::Status; +using helloworld::HelloRequest; +using helloworld::HelloReply; +using helloworld::Greeter; + +// Logic and data behind the server's behavior. +class GreeterServiceImpl final : public Greeter::Service { + Status SayHello(ServerContext* context, const HelloRequest* request, + HelloReply* reply) override { + std::string prefix("Hello "); + + // Get the client's initial metadata + std::cout << "Client metadata: " << std::endl; + const std::multimap<grpc::string_ref, grpc::string_ref> metadata = context->client_metadata(); + for (auto iter = metadata.begin(); iter != metadata.end(); ++iter) { + std::cout << "Header key: " << iter->first << ", value: "; + // Check for binary value + size_t isbin = iter->first.find("-bin"); + if ((isbin != std::string::npos) && (isbin + 4 == iter->first.size())) { + std::cout << std::hex; + for (auto c : iter->second) { + std::cout << static_cast<unsigned int>(c); + } + std::cout << std::dec; + } else { + std::cout << iter->second; + } + std::cout << std::endl; + } + + context->AddInitialMetadata("custom-server-metadata", "initial metadata value"); + context->AddTrailingMetadata("custom-trailing-metadata", "trailing metadata value"); + reply->set_message(prefix + request->name()); + return Status::OK; + } +}; + +void RunServer() { + std::string server_address("0.0.0.0:50051"); + GreeterServiceImpl service; + + ServerBuilder builder; + // Listen on the given address without any authentication mechanism. + builder.AddListeningPort(server_address, grpc::InsecureServerCredentials()); + // Register "service" as the instance through which we'll communicate with + // clients. In this case it corresponds to an *synchronous* service. + builder.RegisterService(&service); + // Finally assemble the server. + std::unique_ptr<Server> server(builder.BuildAndStart()); + std::cout << "Server listening on " << server_address << std::endl; + + // Wait for the server to shutdown. Note that some other thread must be + // responsible for shutting down the server for this call to ever return. + server->Wait(); +} + +int main(int argc, char** argv) { + RunServer(); + + return 0; +} |