Workaround Telegram upload by URL failed

[mo-rijndael]

Sometimes uploading by URL fails with no reason. Would be nice to implement downloading& uploading pictures in that case (it's not optimal to do it by default), so post would be still crossposted

[hatkidchan]

Yeah, I was having same issue quite often. No clue why that's happening, but for some URLs Telegram just refuses to even show a preview in app itself. I'm not sure how to make that efficiently though, because I don't want to download every image and then re-upload them. But at the same time I'm not sure how to do all of that asynchronously. I'll try to figure that out later this day

[mo-rijndael]

I don't want to download every image and then re-upload them.

But there is no more efficient way. Trying to determine which image triggers this bug would consume even more requests

But at the same time I'm not sure how to do all of that asynchronously.

asyncio.gather