Add logging of the source of a response used to respond a fetch event

[youenn fablet]

Add logging of the source of a response used to respond a fetch event

[youenn fablet]

Created attachment 388052 [details]
Patch

[Darin Adler]

Comment on attachment 388052 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=388052&action=review

> Source/WebCore/Modules/cache/DOMCache.cpp:578
> +                auto resourceResponse = WTFMove(record.response);
> +                resourceResponse.setSource(ResourceResponse::Source::DOMCache);

We do not need to move this into a local variable to modify it. We can just write:

    record.response.setSource(ResourceResponse::Source::DOMCache);

and not make the other changes. Basically, an rvalue reference gives us the permission to modify and/or take the value of something. No reason we need to move it to modify it.

If we were copying rather than moving, then yes, it’s important to copy before modifying something. But that’s not the case here.

> Source/WebCore/Modules/cache/DOMCache.cpp:591
> +            auto resourceResponse = WTFMove(record.response);
> +            resourceResponse.setSource(ResourceResponse::Source::DOMCache);

Ditto.

[youenn fablet]

Created attachment 388297 [details]
Patch for landing

[youenn fablet]

> We do not need to move this into a local variable to modify it. We can just
> write:
> 
>     record.response.setSource(ResourceResponse::Source::DOMCache);

Right, fixed in latest patch.

I also added a small internals test to verify the response source is correctly set if coming from DOM cache.

[youenn fablet]

Created attachment 388416 [details]
Patch for landing

[WebKit Commit Bot]

Comment on attachment 388416 [details]
Patch for landing

Clearing flags on attachment: 388416

Committed r254919: <https://trac.webkit.org/changeset/254919>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/58795155>