Safari Bug "no-cache" network error

• Component: Service Workers
• Status: RESOLVED FIXED

[Janos Wartig]

A fetch request on the page that sets the cache: "no-cache" will result in a network error when it is fetched by a Service Worker.
The error that is thrown looks like this:
TypeError: Request header field Cache-Control is not allowed by Access-Control-Allow-Headers

I implemented a simple test page that reproduces the issue here: https://testjanos.app.baqend.com/
The test page registers a simple Service Worker which listens to fetch requests and tries to fetch them.
It also includes the following script tag:
	<script>
      let options = { method: "POST", cache: "no-cache", mode: "cors", body: '{"weather":true}' };
	  fetch("https://dcinfos-cache.abtasty.com/v1/geoip", options);
	</script>

Ways to reproduce:
1. Go to https://testjanos.app.baqend.com/
2. Open Service Workers view (Developer -> Service Workers)
3. Refresh the page
4. Observe that resource https://dcinfos-cache.abtasty.com/v1/geoip could not be fetched due to above error (error prited to the Service Worker console)

Is there any fix for this issue?

[youenn fablet]

Created attachment 446342 [details]
Patch

[Chris Dumez]

Comment on attachment 446342 [details]
Patch

r=me

[EWS]

Committed r286655 (244968@main): <https://commits.webkit.org/244968@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 446342 [details].

[Radar WebKit Bug Importer]

<rdar://problem/86211355>

[youenn fablet]

*** Bug 236084 has been marked as a duplicate of this bug. ***