[Webkit-unassigned] [Bug 142281] New: [MSE][MAC]xhr cache corrupted under some circumstances.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142281

            Bug ID: 142281
           Summary: [MSE][MAC]xhr cache corrupted under some
                    circumstances.
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: srandoux at cisco.com

When we try to execute some youtube MSE tests within webkit (SAFARI 8.0.3) or webkit tip,
http://yt-dash-mse-test.commondatastorage.googleapis.com/unit-tests/tip.html

the test fails the second time, because a request is made via a HTTPRequest for a file which was downloaded earlier with a different size.

In the url above, click on test 14 (AppendAudio), once the test is over it becomes green. 
Then, click on test 16 (AbortAudio), upon completion it also becomes green.
At last, click again on test 14 (AppendAudio) and this time it is red.

In the result text box, we can see that a file of 200000 bytes was downloaded where it shall have been 1MB bytes. A wireshark capture confirms that the file was retrieved from the cache and not from the network.

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