Original Bug title:
FlickrUpload stopped working due to API request through iframe && X-Frame-Option DENY
Issue:
From the casual user's perspective.
On Wikimedia Commons, Flickr upload through Upload Wizard ( https://commons.wikimedia.org/wiki/Special:UploadWizard ) does no longer work. After selecting a file from Flickr for upload, the throbber spins around but Upload Wizard never knows if the upload succeeded.
For reproducing you should be a member of the sysop or the image-reviewer user group.
JavaScript error console.
Mozilla Firefox latest RC.
Load denied by X-Frame-Options: https://commons.wikimedia.org/w/api.php does not permit framing.
Error: Permission denied to access property 'document'
https://bits.wikimedia.org/commons.wikimedia.org/load.php?debug=false&lang=en&modules=ext.uploadWizard.apiUploadFormDataHandler%2CapiUploadHandler%2Cevents%2CformDataTransport%2CiFrameTransport%2Cpage%7Cjquery.arrowSteps%2Cvalidate%7Cmediawiki.api.category%2Cparse%2Ctitleblacklist%7Cmediawiki.feedback%7Cmediawiki.libs.jpegmeta%7Cschema.UploadWizardErrorFlowEvent%2CUploadWizardFlowEvent%2CUploadWizardStep%2CUploadWizardTutorialActions%2CUploadWizardUploadActions%2CUploadWizardUploadFlowEvent%7Cuw.EventFlowLogger%2Cbase%7Cuw.controller.Deed%2CDetails%2CStep%2CThanks%2CTutorial%2CUpload%2Cbase%7Cuw.model.Description%2Cbase%7Cuw.ui.Step%2CThanks%2CWizard%2Cbase&skin=vector&version=20141021T180751Z&*
Line 12
All response headers: http://pastebin.de/145139
This regression has been presumably introduced with yesterday's deployment of MW 1.25wmf4
Version: unspecified
Severity: normal
URL: https://commons.wikimedia.org/wiki/Commons:Village_pump#.22Select_images_from_Flickr.22_.28Upload_Wizard.29
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=65423