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This repository was archived by the owner on Mar 27, 2026. It is now read-only.
This repository was archived by the owner on Mar 27, 2026. It is now read-only.

IE9 Flash callback issues #46

Description

@k3mist

I am having problems in IE9 with the Flash FileReader callbacks that I can not resolve. After trying to figure this out over a weekend I found what I think may be the problem. I am using the FileAPI polyfill to get the files list in IE9 (which I imagine should not be an issue). This code should work I believe unless I really am doing something wrong here.

Filereader options

filereader:
    id: 'fileAPIProxy'
    filereader: '/assets/libs/webshims/vendor/filereader/filereader.swf'
    expressInstall: '/assets/libs/webshims/vendor/swfobject/expressinstall.swf'

Binding handler code (with feature detection removed)

   isImage = (file) ->
       file and typeof file.type isnt "undefined" and file.type.match('image.*') and file.name.match(/\.(gif|png|jpe?g)$/i)

   $(element).fileReader(viewModel.filereader).on(
      change: (event) ->
        file = FileAPI.getFiles(event)[0]
        if isImage(file)
          reader = new FileReader()
          reader.onload = (event) -> koPhoto.photo_uri(event.target.result)
          reader.readAsDataURL(file)
    )

The Flash callback that is issuing the JS error when readAsDataURL() is executed is below. This link references the Flash Callback problems in IE; http://zaalabs.com/2011/01/adobe-flash-externalinterface-issues-with-internet-explorer/

function __flash__addCallback(instance, name) {
  instance[name] = function () { 
    return eval(instance.CallFunction("<invoke name=\""+name+"\" returntype=\"javascript\">" + __flash__argumentsToXML(arguments,0) + "</invoke>"));
  }
}

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