runtimequestion 382 Async Python · easy
Fix the download that leaks temp files when cancelled
A downloader registers a temporary file before streaming and removes it at the end. When users cancel a download (the task is cancelled mid-stream), the temp file is never removed, and the disk fills up. Fix download so the temp file is removed however the download ends, while a cancelled download still ends cancelled.
Coroutine
async def download(url, temp_files, fetch_chunk, chunks)Effectadds
url + ".part" to the temp_files list, awaits fetch_chunk(url, i) for each chunk, removes the temp entry, and returns the number of chunksRulethe temp entry is removed after success, error and cancellation; cancellation is not swallowed