Download size = -1 (snap download)

It seems like this could have better checking and bail out with more reasons why if the content length is -1.

Why doesn’t this code bail when things are as they expect? You can wind up in the situation I’m in where I’m trying to debug sha3_384 mismatches and I think it was a Content-Length not being set issue.

I guess I was wrong. It appears as though it’s downloading at least something. :confused: