[Webkit-unassigned] [Bug 107298] New: XMLHttpRequest re-issued if server returns 401

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=107298

           Summary: XMLHttpRequest re-issued if server returns 401
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://jsbin.com/ohehon/1/
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: New Bugs
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: costan at gmail.com


Created an attachment (id=183491)
 --> (https://bugs.webkit.org/attachment.cgi?id=183491&action=review)
Test case (also in JSBin)

When Safari issues an XMLHttpRequest and the server returns a 401, Safari seems to repeat the request.

If the server uses OAuth, repeating the request triggers an OAuth error, because the nonce is reused. The server returns a 403, which is reported by the XMLHttpRequest. Both Chrome and Firefox report the 401 response from the XMLHttpRequest.

The link is to a JSBin that demonstrates this issue with the Dropbox API server, but the bug is applicable to any other OAuth API. To reproduce the issue, click through the pop-up authentication (sign into Dropbox if necessary) and look at the console. Safari shows a 403 error, Chrome and Firefox show a 401 error.

I used the Charles proxy to confirm my suspicion that Safari sends a second request to the API server. Any intercepting SSL proxy should do the trick.

Please let me know if there is anything else I can do to help investigate this issue.

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