怎么写一段心跳的代码
时间: 2024-01-22 07:15:59 浏览: 36
以下是一段心跳代码的示例:
```cpp
#include <iostream>
#include <map>
#include <winsock2.h>
class server {
public:
server();
~server();
void severStart(int port);
void serverStop();
void serverAccpt();
void serverRecv();
void selectHeart();
private:
SOCKET serverSide;
SOCKET clientSide;
std::map<SOCKET, int> clientHeart;
};
void server::selectHeart() {
while (true) {
// 检查客户端心跳
for (auto it = clientHeart.begin(); it != clientHeart.end();) {
SOCKET clientSocket = it->first;
int heartCount = it->second;
// 如果心跳次数超过阈值,关闭连接
if (heartCount >= 3) {
std::cout << "Client disconnected: " << clientSocket << std::endl;
closesocket(clientSocket);
it = clientHeart.erase(it);
} else {
// 发送心跳包
std::string heartbeat = "heartbeat";
send(clientSocket, heartbeat.c_str(), heartbeat.size(), 0);
it->second++;
++it;
}
}
// 等待客户端心跳回复
fd_set readfds;
FD_ZERO(&readfds);
FD_SET(serverSide, &readfds);
timeval timeout;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
int activity = select(0, &readfds, nullptr, nullptr, &timeout);
if (activity == SOCKET_ERROR) {
std::cerr << "Select error" << std::endl;
break;
}
// 如果有客户端发送心跳包,重置心跳次数
if (FD_ISSET(serverSide, &readfds)) {
SOCKET newClient = accept(serverSide, nullptr, nullptr);
clientHeart[newClient] = 0;
std::cout << "New client connected: " << newClient << std::endl;
}
}
}
int main() {
server s;
s.severStart(7777);
s.selectHeart();
s.serverStop();
return 0;
}
```
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