[Webkit-unassigned] [Bug 4363] document.lastModified format is incorrect

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=4363


karl <karl+webkit at la-grange.net> changed:

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                 CC|                            |karl+webkit at la-grange.net




--- Comment #7 from karl <karl+webkit at la-grange.net>  2010-10-15 06:48:14 PST ---
There is a subtle difference between Firefox and IE. I have tested yesterday with different browsers the dates returned when HTTP Last-Modified is not returned by the server.

HTML5 specification says 
http://www.w3.org/TR/html5/dom.html#dom-document-lastmodified

"The Document 's source file's last modification date and time must be derived from relevant features of the networking protocols used, e.g. from the value of the HTTP Last-Modified header of the document, or from metadata in the file system for local files."

For a page where the HTTP header is 
Last-Modified: Wed, 13 Oct 2010 17:11:52 GMT

Opera 10.63  - Wed, 13 Oct 2010 17:11:52 GMT
Safari 5.0.2 - Wed, 13 Oct 2010 17:11:52 GMT
chrome v6.0.472.63 - Wed, 13 Oct 2010 17:11:52 GMT
Firefox 4.0b6 - 10/13/2010 13:11:52
IE8 - 10/13/2010 13:11:52

Conclusion IE8, Firefox are aligned with the specification.

When Last-Modified is not defined, HTML5 says:

"If the last modification date and time are not known, the attribute must return the current date and time in the above format."

The results are:

Opera 10.63 - January 1, 1970 GMT
Safari 5.0.2 - Nil
chrome v6.0.472.63 - Nil
Firefox 4.0b6 - 10/13/2010 14:36:31 (date of the cache)
IE8 - 10/13/2010 14:53:22 (date of now)

Only IE8 is aligned with the specification.

Note that the HTML5 Specification editor welcomes modifications to the specification if implementers decide to align on one format. One of the issues is the proposed format in the specification is a US one, aka "MM/DD/YYYY HH:MM:SS" See http://lists.w3.org/Archives/Public/public-html/2007Jun/1005

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