connection closed before message completed

[DevBlocky]

Infrequent error that happens during MISS requests where a connection is closed before the download of the image can be started.

It's documented with hyperium/hyper#2136, and is related to keep-alives being closed by the target while we try a message. Possible solution is to implement retry behavior.

Example Logs

[2021-05-30T05:48:07Z ERROR scalpel::http::handler] unexpected upstream error before download (error sending request for url (https://reh3tgm2rs8sr.xnvda7fch4zhr.mangadex.network/data/22b9b3d01473f7ab671c5aef21dbe1f5/n31-1f7489d0d4ace98891f8cf73d105be69095304ee78a6eff4418afaad5a696498.png): connection closed before message completed)
[2021-05-30T05:53:43Z ERROR scalpel::http::handler] unexpected upstream error before download (error sending request for url (https://reh3tgm2rs8sr.xnvda7fch4zhr.mangadex.network/data/5c91564db1a34f123432e738b8eb8271/21-5d1905830e67e1a05ac90792f11f0834af416309b6c6eb94b5a46da39e0ffb06.png): connection closed before message completed)
[2021-05-30T07:47:45Z ERROR scalpel::http::handler] unexpected upstream error before download (error sending request for url (https://reh3tgm2rs8sr.xnvda7fch4zhr.mangadex.network/data/980ff600525bb34d3f7cf1b3b8423ffb/g43-818bb01b89e5211079ebbfee4fc0f497bad578d78ea7db1d8e31fa3e4a1d835c.jpg): connection closed before message completed)

[DevBlocky]

fixed in d5884e5