private: static size_t writeCallback(void* contents, size_t size, size_t nmemb, void* userp); static int progressCallback(void* userp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow); struct DownloadContext std::ofstream file; size_t downloaded_bytes = 0; size_t total_bytes = 0; ProgressCallback progress_cb; std::string output_path; bool resume_mode = false; ; std::unique_ptr<DownloadContext> m_context; std::thread m_downloadThread; std::atomic<bool> m_activefalse; std::atomic<bool> m_cancelfalse; std::string m_lastError; CURL* m_curl; ;
# Install libcurl (Ubuntu/Debian) sudo apt-get install libcurl4-openssl-dev mkdir build && cd build cmake .. && make Run ./downloader runtime c++ download
// download_manager.cpp #include "download_manager.h" #include <curl/easy.h> #include <sys/stat.h> private: static size_t writeCallback(void* contents
cmake_minimum_required(VERSION 3.10) project(DownloadManager) set(CMAKE_CXX_STANDARD 17) static int progressCallback(void* userp
This is production-ready code that handles real-world download scenarios efficiently.