[syndication] [Bug 372006] New: [Patch] Support feed deltas

[Daniel]

https://bugs.kde.org/show_bug.cgi?id=372006

            Bug ID: 372006
           Summary: [Patch] Support feed deltas
           Product: syndication
           Version: git
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: code at daniel.priv.no
  Target Milestone: ---

Created attachment 101990
  --> https://bugs.kde.org/attachment.cgi?id=101990&action=edit
Patch

Support RFC3229 with the feed extension.

Instead of returning the full feed, supporting servers will return the delta
since the If-Modified-Since timestamp or the If-None-Match ETag identifier.
Reduces the bandwidth requirements for users and servers like, and reduces
processing required as feeds only contain new entries since the last time they
where checked.

The only modification required to support this in Akregator is adding the
`A-IM: feed` header in requests when updating feeds. I’ve only tested this with
Akregator, where it works as desired.

Question:
Does Syndication have other uses that I’m not aware of where the full feed
would be preferred instead of deltas?

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