Bug #21871 See Comments

Internet Explorer (IE7–IE11 on Win8.1 or lower) prompts to save index.json when uploading a file.

Version: 3.3.1 Reporter: Derek Jones

This is an archived bug report. If you are experiencing a similar issue, upgrade to the latest release and if that does not solve the problem, submit a new bug report

Problem: When uploading a file, Internet Explorer prompts to save or open a download named index.json. The file is uploaded to the server, but the upload dialog remains open, and the file is not added to the file field.

Reason: On Windows 8.1 and lower, Internet Explorer does not support JSON responses sent with the proper content type application/json. When it receives an Ajax response from ExpressionEngine’s file uploader with that header, it prompts you to download a file named index.json rather than allowing that Ajax response to be processed by ExpressionEngine.

  • There are three available options to solve this:

    • Upgrade Windows to version 10 or higher (free upgrade). Microsoft has confirmed this will not be addressed in Win8.1:
    Posted by Charles [MSFT] on 4/13/2015 at 5:32 PM: Viewing JSON is now supported in Windows 10 builds 10049 and greater.
    • or, Switch to a different browser: Chrome is our recommended browser for all Windows users, followed by Firefox.

    • or, Apply a change to your Windows Registry that allows proper handling of the application/json content type in Win8.1. It essentially involves copying and pasting code from the linked solution into a file on your desktop with a .reg extension, double clicking it to modify the Registry, and restarting.

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