在Windows下的c++中捕获std::string中libcurl的输出

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

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* output);

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* output) {
    size_t totalSize = size * nmemb;
    output->append(static_cast<char*>(contents), totalSize);
    return totalSize;
}

int main() {
    CURL* curl;
    CURLcode res;
    std::string output;

    curl_global_init(CURL_GLOBAL_DEFAULT);
    curl = curl_easy_init();
    if (curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &output);

        res = curl_easy_perform(curl);
        if (res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        }

        curl_easy_cleanup(curl);
    }

    curl_global_cleanup();

    // 输出捕获到的libcurl输出
    std::cout << output << std::endl;

    return 0;
}