[Webkit-unassigned] [Bug 202142] Fix ServiceWorker downloads

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=202142

--- Comment #13 from youenn fablet <youennf at gmail.com> ---
(In reply to Pedro Pedrosa from comment #12)
> Regardless of the above discussion, even if the client page remains open,
> downloading a service worker generated response (Content-Disposition:
> attachment) still doesn't work.
> 
> Downloading by clicking on a link simply doesn't trigger the service worker
> at all and downloads the URL from the network.
> 
> Downloading by creating a hidden iframe does trigger the service worker, and
> I can see that the service worker responds with a stream and that this
> stream is actually read all the way through, but the download manager simply
> doesn't care and downloads the URL from the network.
> 
> This is a show-stopper for my application so I'm forced to tell my users
> that downloading files this way is not supported by safari.

Right, this is a known limitation that should definitely be fixed.
If the service worker is generating the content (no opaque response), the workaround is to generate a blob from the Response and trigger the download as a blob.

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