使用c++实现双向通信 grpc
时间: 2023-12-08 14:01:17 浏览: 72
gRPC是一种高性能、开源的通信框架,它支持多种编程语言,包括C。要使用C实现双向通信的gRPC,可以按照以下步骤进行:
1. 定义协议:首先,需要使用Protocol Buffers语言编写一个.proto文件,定义通信双方之间的数据结构和服务接口等信息。例如,可以定义一个简单的服务接口,包含两个双向通信的方法。
2. 生成代码:使用gRPC提供的protoc工具将.proto文件编译为对应编程语言(C)的代码。命令类似于:`protoc -I=. --grpc_out=. --plugin=protoc-gen-grpc=/path/to/grpc_c_plugin your_service.proto`
3. 实现服务:根据生成的代码,实现服务端和客户端的逻辑。服务端需要监听指定的网络地址,接受客户端请求,并对请求进行处理。客户端可以连接到服务端,发送请求并接收响应。
4. 实现双向通信:在服务端和客户端的代码中,使用gRPC提供的双向流式RPC(Bidirectional Streaming RPC)来实现双向通信。双向流式RPC允许服务端和客户端同时读写数据流,可以实现实时的双向通信。
5. 编译和运行:使用C编译器将实现的代码编译为可执行文件,然后分别在服务端和客户端上运行。
总结:使用C实现双向通信的gRPC,通过定义协议、生成代码、实现服务、使用双向流式RPC等步骤,可以实现高效、可扩展的双向通信。双向通信可以满足多种应用场景的需求,如实时聊天、实时数据推送等。
相关问题
使用C++写一个grpc的通信案例
好的,以下是一个简单的grpc通信案例。
首先,安装protobuf和grpc。在Ubuntu下,可以使用以下命令安装:
```
sudo apt-get install protobuf-compiler
sudo apt-get install libprotobuf-dev
sudo apt-get install grpc-tools
sudo apt-get install libgrpc-dev
```
接下来,我们需要定义.proto文件。例如,我们定义一个Hello.proto文件:
```protobuf
syntax = "proto3";
package helloworld;
message HelloRequest {
string name = 1;
}
message HelloReply {
string message = 1;
}
service Greeter {
rpc SayHello (HelloRequest) returns (HelloReply) {}
}
```
然后,使用以下命令生成C++代码:
```
protoc -I=./ --grpc_out=./ --plugin=protoc-gen-grpc=`which grpc_cpp_plugin` ./Hello.proto
protoc -I=./ --cpp_out=./ ./Hello.proto
```
生成的代码包括Hello.pb.h和Hello.pb.cc,以及Hello.grpc.pb.h和Hello.grpc.pb.cc。
接下来,我们编写客户端代码:
```c++
#include <iostream>
#include <memory>
#include <string>
#include <grpcpp/grpcpp.h>
#include "Hello.grpc.pb.h"
using grpc::Channel;
using grpc::ClientContext;
using grpc::Status;
using helloworld::HelloRequest;
using helloworld::HelloReply;
using helloworld::Greeter;
class GreeterClient {
public:
GreeterClient(std::shared_ptr<Channel> channel)
: stub_(Greeter::NewStub(channel)) {}
std::string SayHello(const std::string& user) {
HelloRequest request;
request.set_name(user);
HelloReply reply;
ClientContext context;
Status status = stub_->SayHello(&context, request, &reply);
if (status.ok()) {
return reply.message();
} else {
return "RPC failed";
}
}
private:
std::unique_ptr<Greeter::Stub> stub_;
};
int main(int argc, char** argv) {
GreeterClient greeter(grpc::CreateChannel("localhost:50051", grpc::InsecureChannelCredentials()));
std::string user("world");
std::string reply = greeter.SayHello(user);
std::cout << "Greeter received: " << reply << std::endl;
return 0;
}
```
最后,编写服务器端代码:
```c++
#include <iostream>
#include <memory>
#include <string>
#include <grpcpp/grpcpp.h>
#include "Hello.grpc.pb.h"
using grpc::Server;
using grpc::ServerBuilder;
using grpc::ServerContext;
using grpc::Status;
using helloworld::HelloRequest;
using helloworld::HelloReply;
using helloworld::Greeter;
class GreeterServiceImpl final : public Greeter::Service {
Status SayHello(ServerContext* context, const HelloRequest* request,
HelloReply* reply) override {
std::string prefix("Hello ");
reply->set_message(prefix + request->name());
return Status::OK;
}
};
void RunServer() {
std::string server_address("0.0.0.0:50051");
GreeterServiceImpl service;
grpc::EnableDefaultHealthCheckService(true);
grpc::reflection::InitProtoReflectionServerBuilderPlugin();
ServerBuilder builder;
builder.AddListeningPort(server_address, grpc::InsecureServerCredentials());
builder.RegisterService(&service);
std::unique_ptr<Server> server(builder.BuildAndStart());
std::cout << "Server listening on " << server_address << std::endl;
server->Wait();
}
int main(int argc, char** argv) {
RunServer();
return 0;
}
```
现在,我们可以先运行服务器端代码,然后再运行客户端代码,观察输出结果。
使用C++写一个grpc的通信例子,包括客户端和服务端
好的,下面是一个简单的示例,包括客户端和服务端。首先,我们需要安装gRPC和protobuf库。
服务端代码:
```cpp
#include <iostream>
#include <memory>
#include <string>
#include <grpcpp/grpcpp.h>
#include "helloworld.grpc.pb.h"
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 ");
reply->set_message(prefix + request->name());
return Status::OK;
}
};
void RunServer() {
std::string server_address("0.0.0.0:50051");
GreeterServiceImpl service;
grpc::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.
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;
}
```
客户端代码:
```cpp
#include <iostream>
#include <memory>
#include <string>
#include <grpcpp/grpcpp.h>
#include "helloworld.grpc.pb.h"
using grpc::Channel;
using grpc::ClientContext;
using grpc::Status;
using helloworld::HelloRequest;
using helloworld::HelloReply;
using helloworld::Greeter;
class GreeterClient {
public:
GreeterClient(std::shared_ptr<Channel> channel)
: stub_(Greeter::NewStub(channel)) {}
std::string SayHello(const std::string& user) {
// Data we are sending to the server.
HelloRequest request;
request.set_name(user);
// Container for the data we expect from the server.
HelloReply reply;
// Context for the client. It could be used to convey extra information to
// the server and/or tweak certain RPC behaviors.
ClientContext context;
// The actual RPC.
Status status = stub_->SayHello(&context, request, &reply);
// Act upon its status.
if (status.ok()) {
return reply.message();
} else {
std::cout << status.error_code() << ": " << status.error_message()
<< std::endl;
return "RPC failed";
}
}
private:
std::unique_ptr<Greeter::Stub> stub_;
};
int main(int argc, char** argv) {
// Create a channel to the server.
std::shared_ptr<Channel> channel =
grpc::CreateChannel("localhost:50051", grpc::InsecureChannelCredentials());
GreeterClient greeter(channel);
std::string user("world");
std::string reply = greeter.SayHello(user);
std::cout << "Greeter received: " << reply << std::endl;
return 0;
}
```
编译命令:
```bash
$ g++ -std=c++11 -I./include -L./lib -o server server.cpp helloworld.grpc.pb.cc helloworld.pb.cc -lgrpc++ -lgrpc -lprotobuf -lpthread
$ g++ -std=c++11 -I./include -L./lib -o client client.cpp helloworld.grpc.pb.cc helloworld.pb.cc -lgrpc++ -lgrpc -lprotobuf -lpthread
```
运行命令:
```bash
$ ./server
$ ./client
```
运行结果:
```bash
# server console
Server listening on 0.0.0.0:50051
# client console
Greeter received: Hello world
```
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