linux c++ 服务 程序

#include <iostream>
#include <string>
#include <thread>
#include <vector>
#include <cstring>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

const int PORT = 8080;

void handle_request(int client_socket) {
    char buffer[1024] = {0};
    read(client_socket, buffer, 1024);
    std::string response = "HTTP/1.1 200 OK\r\nContent-Length: 12\r\n\r\nHello World!";
    send(client_socket, response.c_str(), response.size(), 0);
    close(client_socket);
}

int main() {
    int server_fd, new_socket;
    struct sockaddr_in address;
    int opt = 1;
    int addrlen = sizeof(address);

    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
        perror("setsockopt");
        exit(EXIT_FAILURE);
    }
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }
    if (listen(server_fd, 3) < 0) {
        perror("listen");
        exit(EXIT_FAILURE);
    }

    std::vector<std::thread> threads;
    while (true) {
        if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
            perror("accept");
            exit(EXIT_FAILURE);
        }
        threads.emplace_back(handle_request, new_socket);
    }

    for (auto& th : threads) th.join();
    return 0;
}