Support Range requests on files.pythonhosted.org

[dholth]

Describe the bug
Byte Range: requests appear to be broken on files.pythonhosted.org, noticed in pypa/pip#8723 . This was supported earlier last year.

To Reproduce
A 206 response would be expected, but we see

curl -I https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl -i -H "Range: bytes=0-1023"
HTTP/2 200 
last-modified: Sun, 13 Dec 2020 18:09:08 GMT
etag: "6c222a4df97a3311b4e189a59c47dea0"
content-type: application/octet-stream
x-goog-hash: crc32c=+zKrbw==
x-goog-hash: md5=bCIqTfl6MxG04YmlnEfeoA==
server: UploadServer
cache-control: max-age=365000000, immutable, public
accept-ranges: bytes
date: Wed, 06 Jan 2021 15:41:19 GMT
age: 2064730
x-served-by: cache-sea4427-SEA, cache-fty21321-FTY
x-cache: HIT, HIT
x-cache-hits: 4, 19
x-timer: S1609947679.367178,VS0,VE0
strict-transport-security: max-age=31536000; includeSubDomains; preload
x-frame-options: deny
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
x-permitted-cross-domain-policies: none
x-robots-header: noindex
content-length: 35046

Additional context
I understand pypi is using these services. This documentation mentions a few configuration quirks that could prevent range requests from working.
https://docs.fastly.com/en/guides/segmented-caching https://cloud.google.com/storage/docs/transcoding#range

[ewdurbin]

It works for actual GET, but not HEAD. You've issued a HEAD request via the -I parameter of your curl command.

[dholth]

Thanks and sorry for the misunderstanding. These commands show that we get the expected number of bytes from a couple of range requests.

$ curl https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl -H "Range: bytes=0-4747" | wc
     16      94    4748

$ curl https://files.pythonhosted.org/packages/65/63/39d04c74222770ed1589c0eaba06c05891801219272420b40311cd60c880/wheel-0.36.2-py2.py3-none-any.whl -H "Range: bytes=-4747" | wc

     14      76    4747