[Webkit-unassigned] [Bug 44721] New: XHR.responseBlob

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=44721

           Summary: XHR.responseBlob
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: XML
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: michaeln at google.com
        Depends on: 44133


This is an umbrella bug for adding support for getting the response as a blob.

Two new additions for the XHR interface in support of this. This is not entirely solidified yet, still pending some discussion on the public lists.

boolean attribute asBlob;
// Prepares the XHR to make the response available as a blob object.
// Defaults to false, must be set after calling open() and
// prior to calling send(). Gets reset upon subsequent calls to open().
// Throws INVALID_STATE_ERR if set at an invalid time. Maybe read at
// anytime without exception.

Blob attribute responseBlob;
// Returns a blob the contains the response body.
// Only valid to access when asBlob is true and when the request is in
// a terminal state. Throws INVALID_STATE_ERR if accessed at an
// invalid time.

When asBlob is true, the other response accessors (responseText, resonseXML, responseBody) throw INVALID_STATE_ERR if accessed.

We're making this "modal" for the benefit of the browser vendors, to make it easier for them to know how to handle the response data as it comes in. With a priori knowlege that the data need never be made available thru the responseText attribute, life is a little easier for them/us.

Also see http://code.google.com/p/chromium/issues/detail?id=52486

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