IE prompts to open or save json result from server

Question

Internet explorer in compatibility mode gets the data from the server in an ajax callback method, and pops-up a dialog if I want to save the data or open. How to get rid of

Answer 1

I faced this while using jQuery FileUpload plugin.

Then I took a look in their documentation, most exactly in the Content-Type Negotiation section and followed their suggestion for Ruby/Rails.

render(json: , content_type: request.format)

Which fixed the issue for me.

Quick Explanation: for old IE/Opera versions, this plugin will use an iframe with text/plain or text/html content-type, so if you force the response to json, browser will try download it. Using the same content-type as in the request will make it work for any browser.