Utilize Prefer Header

[ibnesayeed]

As proposed in http://ws-dl.blogspot.com/2016/08/2016-08-15-mementos-in-raw-take-two.html it should be possible to request for the original content for the proxy without using the id_ hack. However, it is not reliable yet until many archives start supporting that.

[machawk1]

Do any of the archives that are aggregated by default support this, @ibnesayeed? I think support for something like this was added to pywb, so we might look to those to identify support.

[ibnesayeed]

Yes, we need to asses the support of Prefer header in replay systems and their deployment base before we consider putting any cycles in coding this.

[machawk1]

@ikreymer Do you have a running list of publicly available archives that are using pywb and if any have Prefer mod enabled?