CORS check is sometimes incorrectly failing for media loads

• Component: Media
• Status: RESOLVED FIXED

[Chris Dumez]

CORS check is sometimes incorrectly failing for media loads. This happens when our media library issues a conditional request and when the sever responds with a "304 Not Modified" response which does not have the "Access-Control-Allow-Origin: *" header. Apache for example does not provide such header for 304 responses.

[Chris Dumez]

<rdar://problem/26071607>

[Chris Dumez]

Created attachment 278156 [details]
WIP Patch

[Alex Christensen]

Comment on attachment 278156 [details]
WIP Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=278156&action=review

> Source/WebCore/loader/MediaResourceLoader.cpp:73
> +    if (updatedRequest.isConditional() && corsPolicy == PotentiallyCrossOriginEnabled) {

We shouldn't need to check if a request is conditional.  Just make it unconditional, which won't do anything if it is not conditional.  This will reduce iterating.
We also don't need to make a new ResourceRequest for non-cors requests.

[Chris Dumez]

Comment on attachment 278156 [details]
WIP Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=278156&action=review

>> Source/WebCore/loader/MediaResourceLoader.cpp:73
>> +    if (updatedRequest.isConditional() && corsPolicy == PotentiallyCrossOriginEnabled) {
> 
> We shouldn't need to check if a request is conditional.  Just make it unconditional, which won't do anything if it is not conditional.  This will reduce iterating.
> We also don't need to make a new ResourceRequest for non-cors requests.

Yes, I thought about calling makeUnconditional() directly as well. I have it done locally already.

It is true we do not have to copy the request in the non-CORS case, it is just easier to write this way.

[Chris Dumez]

Created attachment 278193 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 278193 [details]
Patch

Clearing flags on attachment: 278193

Committed r200493: <http://trac.webkit.org/changeset/200493>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Michael Catanzaro]

This test is timing out for GTK, see bug #158921.