Deconstructing Telegram Media Extraction: Building a High-Performance Downloader with MTProto and Async I/O

Introduction As developers, we are often fascinated by how global-scale platforms manage and distribute massive multimedia data. Telegram is not just a messaging app; from an engineering perspective, it is a colossal distributed object storage system built on a custom encryption protocol known as MTProto. However, for developers building web-based archiving tools or users needing to extract resources cross-platform, Telegram's "walled garden" (specifically its mobile-first caching and binary pro