请求一个URL并在c++中后台运行

#include <iostream>
#include <curl/curl.h>

// 回调函数，用于处理接收到的数据
size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* response) {
    size_t totalSize = size * nmemb;
    response->append((char*)contents, totalSize);
    return totalSize;
}

int main() {
    // 初始化CURL库
    curl_global_init(CURL_GLOBAL_DEFAULT);

    // 创建CURL句柄
    CURL* curl = curl_easy_init();
    if (curl) {
        std::string response;

        // 设置请求的URL
        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

        // 设置回调函数，用于处理接收到的数据
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);

        // 执行请求
        CURLcode res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            std::cerr << "请求失败: " << curl_easy_strerror(res) << std::endl;
        } else {
            std::cout << "请求成功，返回结果：" << std::endl;
            std::cout << response << std::endl;
        }

        // 清理CURL句柄
        curl_easy_cleanup(curl);
    }

    // 清理CURL库
    curl_global_cleanup();

    return 0;
}