[wp-trac] [WordPress Trac] #17117: WordPress serves up wrong MIME type for Office 2007 downloads

[WordPress Trac]

#17117: WordPress serves up wrong MIME type for Office 2007 downloads
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 Reporter:  LafayetteNuke  |      Owner:
     Type:  defect (bug)   |     Status:  new
 Priority:  normal         |  Milestone:  Awaiting Review
Component:  Filesystem     |    Version:  3.1
 Severity:  normal         |   Keywords:
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 When serving up hosted files for download, WordPress assigns the wrong
 MIME type for Office 2007. For example, docx files are served up as
 "application/msword" instead of "application/vnd.openxmlformats-
 officedocument.wordprocessingml.document"

 As a result, browsers end up interpreting the files in different ways.
 Some, like IE8 on Windows 7 or Safari on Mac OS X 10.6, will add a ".doc"
 to the end of the file name. Others (Firefox, Chrome) will see the Office
 98-2003 MIME type, but keep the existing file name. The iPad displays a
 "Unknown file type" error. The issue is not limited to Word 2007 files
 however; all Office 2007 files (pptx, xlsx) appear to have the same issue.

 There is a forum discussion for this issue:
 http://wordpress.org/support/topic/docx-files-and-functionsphp?replies=9

 It's possible this bug was introduced here:
 http://core.trac.wordpress.org/changeset/9662

 The proposed change is to tweak the MIME declarations in wp-
 includes/functions.php to reflect the proper MIME type information.

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Ticket URL: <http://core.trac.wordpress.org/ticket/17117>
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