[wp-trac] [WordPress Trac] #11487: Fix AJAX bug created by web hosts who inject ads into html pages

[WordPress Trac]

#11487: Fix AJAX bug created by web hosts who inject ads into html pages
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 Reporter:  palotasb      |       Owner:                              
     Type:  defect (bug)  |      Status:  new                         
 Priority:  normal        |   Milestone:  Unassigned                  
Component:  General       |     Version:                              
 Severity:  normal        |    Keywords:  free web hosting, ads, admin
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 Most web hosting companies insert ads into HTML pages downloaded from
 them. This breaks some admin page features, because files downloaded via
 AJAX have a text/html header and the host automatically injects the ads.
 This sometimes creates a reload cycle or makes the page completely
 unaccessible.

 I have fixed the issue partly by editing /wp-admin/admin-ajax.php at line
 19 and /wp-admin/index-extra.php at line 18, by overwriting the Content-
 Type header to be text/plain. This does not fix the issue on the admin
 dashboard, where some widgets need to be disabled.

 I suggest that any content not rendered directly by the browser (used for
 AJAX data transfer only, processed by JavaScript, where only content
 matters) should be transferred using a text/plain header. This should be a
 straightforward change and I don't think it could cause any bugs
 (actually, it works for me), but you may want to investigate.

 In case you want to reproduce, you have to set up a web server in a way
 that it injects some content into the body of every served file with the
 text/html MIME type.

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Ticket URL: <http://core.trac.wordpress.org/ticket/11487>
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