gitlab-zip-cat fails with `net/http: request canceled`

We introduced in gitlab-zip-cat support for externally hosted .zip archives, allowing us to do range download to fetch only parts of archive to download specific file.

However, this works like 50% of time.

When it does not work it fails with:

net/http: request canceled

Some reproduce case:

export ARCHIVE_PATH=https://s3.amazonaws.com/challengepost/zip_files/production/4553/zip_files/BD%20MGIT%20Technology%20PFH%20Binder.zip
export ENCODED_FILE_NAME=$(echo -n "BD MGIT Technology PFH Binder.pdf" | base64)
./gitlab-zip-cat

(Try to use also different .zip archives, it fails the same way).

@nick.thomas Do you have some idea where we hit the timeout?