Permission error when using Ajax on a protocol other than http

Question

Hello,

We are using a custom protocol handler to connect to an embedded device across firewalls, NAT etc. The solution is called Nabto.
This works great - a plug-in on the user's computer handles requests to all nabto:// URIs and serves HTML pages with information about the current connections etc.

Now, we would like to access Nabto functionality from a regular web page. This is difficult with browsers enforcing the Same-Origin policy (e.g. our http page cannot communicate with the nabto page).
So far, I am trying to solve this using easyXDM by having a "proxy page" served by the nabto plug-in. This page is then allowed to launch nabto:// requests and can communicate the results back to the http page using easyXDM.

However, same-origin requests fail in Internet Explorer - even when both pages reside in the nabto://self domain. I get this error: image

Is this an error in Internet Explorer? Any idea how to solve it?

Thanks a lot,
Martin

Answer 1

We had huge issues that sound similar to yours when developing the plugin. I must admit that we gave up getting clean Ajax support working through Nabto after spending a lot of time on it. In fact, the final thing that happened was opening a support case with Microsoft about it, the case bounced around and we never heard anything back.

There might be a chance though for a hack: In the meantime we realized that IE allows you to populate images through nabto:// urls on an http / https page. Maybe you can populate an image object through your query and extract the result from there?

On a side note: You are welcome to post in the support forums (forum.nabto.com) about such things. On the other hand, you help spread the word about the product in this way ;-)

Ulrik