Question

In my application I have a WebView and I would like to be able to disable the security feature of not allowing ctx.getImageData on a canvas where an image from the local (file:// url) machine was drawn.

There doesn’t seem to be a method on the policy delegate to enable this. Now I could implement a server in my app to act like a proxy, but that seems like quite an overkill. How should I solve this?

Answer 1

The solution turns out to be relatively simple:

1. Download the webkit source.

2. Comment out these lines (1558 – 1561):

   if (!canvas()->originClean()) {
        ec = SECURITY_ERR;
        return 0;
   }
   

3. Build.

4. Add it as a framework in XCode.