[webkit-dev] Request for feedback on CompressionStream and DecompressionStream

[Adam Rice]

We are implementing the "deflate-raw" compression codec for compression
streams. This is similar to "deflate" but lacks a header and footer. In
other words, it is pure RFC1951, unlike "deflate" which is actually
RFC1950, "ZLIB Compressed Data Format". The awkward naming is for
compatibility with HTTP Content-Encodings.

One of the major use cases for this is implementing the ZIP format, which
otherwise requires some ugly hacks:
https://github.com/WICG/compression/issues/25#issuecomment-850959782

This is a tiny addition, so I haven't created a new thread for it. Any
feedback is welcome.

Thanks,
Adam Rice, Chromium

On Thu, 13 Aug 2020 at 08:37, Ryosuke Niwa <rniwa at webkit.org> wrote:

> Hi all,
>
> This is a very belated reply but what's being proposed seems
> reasonable to us (Apple's WebKit team). We would like to know more
> about use cases, and how they might be deployed in real websites / use
> cases but we don't see any major issues with it.
>
> - R. Niwa
>
> On Wed, Nov 27, 2019 at 11:18 PM Thomas Steiner <tomac at google.com> wrote:
> >
> > You can see DecompressionStream in action in unarchiver, this is the
> relevant code snippet (run it in Chrome 79+ with the
> chrome://flags/#native-file-system-api and the
> chrome://flags/#enable-experimental-web-platform-features flags set).
> >
> > On Thu, Nov 28, 2019 at 6:07 AM Adam Rice <ricea at chromium.org> wrote:
> >>
> >> I am trying to gauge feedback on compression streams with a view to
> shipping them in Chromium.
> >>
> >> Very briefly, they are a way to do gzip and gunzip in the browser. Less
> briefly, the explainer
> https://github.com/WICG/compression/blob/master/explainer.md goes into
> some detail of the how and why. The specification
> https://wicg.github.io/compression/ gives verbose detail of how. You may
> also find the W3C TAG review
> https://github.com/w3ctag/design-reviews/issues/410 interesting.
> >
> > _______________________________________________
> > webkit-dev mailing list
> > webkit-dev at lists.webkit.org
> > https://lists.webkit.org/mailman/listinfo/webkit-dev
>
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