ftps

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

int main(void)
{
    CURL *curl;
    CURLcode res;

    curl_global_init(CURL_GLOBAL_DEFAULT);

    curl = curl_easy_init();
    if(curl) {
        curl_easy_setopt(curl, CURLOPT_URL, "ftps://example.com/");

        /* 设置代理 */
        curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example.com:1080");
        curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTP);

        /* 启用FTP目录列表 */
        curl_easy_setopt(curl, CURLOPT_DIRLISTONLY, 1L);

        /* 打开verbose模式，用于调试和检查libcurl的行为 */
        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);

        /* 如果您的FTP服务器需要身份验证 */
        curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
        curl_easy_setopt(curl, CURLOPT_PASSWORD, "pass");

        /* 执行请求，res将获取返回代码 */
        res = curl_easy_perform(curl);

        /* 检查错误 */
        if(res != CURLE_OK)
            fprintf(stderr, "curl_easy_perform() failed: %s\n",
                curl_easy_strerror(res));

        /* 总是清理 */
        curl_easy_cleanup(curl);
    }

    curl_global_cleanup();

    return 0;
}