[BUG] Failed download attachments after starting for a period of time

[niuhuan]

Because FileDownloader does not have the ability to reconnect

I tried delete this line codes, then this bug has been fixed.

grammers/lib/grammers-client/src/client/net.rs

Line 343 in a0c5ef3

mutex.insert(dc_id, new_downloader.clone());

This line of code is for multiple downloads to use one Downloader, If delete this line, a new Downloader will be generated each time.

The code is dirty, and my code quality is not good. It may take a long time. At the same time, I hope others can repair it.

Icreate a new issue and record it first.

[gus4rs]

The workaround works because it creates a new downloader on every download, which is wasteful. A solution is to only re-create the downloader if it is disconnected, reuse it otherwise