C++ socket服务器

要创建一个基本的C++ socket服务器，你可以按照以下步骤进行操作：

1. 包含必要的头文件：

#include <iostream>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

2. 创建服务器socket：

int serverSocket = socket(AF_INET, SOCK_STREAM, 0);
if (serverSocket == -1) {
    std::cout << "Failed to create socket." << std::endl;
    return -1;
}

3. 绑定服务器地址和端口：

struct sockaddr_in serverAddress;
serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.s_addr = INADDR_ANY;
serverAddress.sin_port = htons(8080);  // 替换为你想要使用的端口号

if (bind(serverSocket, (struct sockaddr*)&serverAddress, sizeof(serverAddress)) == -1) {
    std::cout << "Failed to bind socket." << std::endl;
    return -1;
}

4. 监听连接请求：

if (listen(serverSocket, 5) == -1) {
    std::cout << "Failed to listen on socket." << std::endl;
    return -1;
}

5. 接受客户端连接：

struct sockaddr_in clientAddress;
socklen_t clientAddressLength = sizeof(clientAddress);
int clientSocket = accept(serverSocket, (struct sockaddr*)&clientAddress, &clientAddressLength);
if (clientSocket == -1) {
    std::cout << "Failed to accept client connection." << std::endl;
    return -1;
}

6. 与客户端进行通信：

char buffer[1024];
int bytesRead = recv(clientSocket, buffer, sizeof(buffer), 0);
if (bytesRead == -1) {
    std::cout << "Failed to receive data from client." << std::endl;
    return -1;
}

// 处理接收到的数据

std::string response = "Hello from server!";
int bytesSent = send(clientSocket, response.c_str(), response.length(), 0);
if (bytesSent == -1) {
    std::cout << "Failed to send response to client." << std::endl;
    return -1;
}

7. 关闭连接：

close(clientSocket);
close(serverSocket);

这只是一个简单的示例，你可以根据自己的需求进行扩展和修改。请注意，以上代码仅展示了基本的服务器功能，没有处理并发连接和错误处理。在实际开发中，你可能需要更多的代码来处理这些情况。