How to configure WebView to allow getImageData on canvas from local or remote files?

Question

In my application, I have a WebView, and I would like to disable the security function, not allowing ctx.getImageDataon the canvas where the image was drawn from the local ( file://url) machine.

To enable this setting, the policy delegate does not seem to exist. Now I can implement the server in my application to act as a proxy server, but this seems like an unnecessary one. How do i solve this?

Answer 1

The solution is relatively simple:

• Download the webkit source.

• Comment on these lines (1558 - 1561):

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

• Build.

• Add it as a frame in Xcode.

Answer 2

uri data:? :

data:text/html;base64,PGgxPlRoZSBNYWdpYyBXb3JkcyBhcmUgU3F1ZWFtaXNoIE9zc2lmcmFnZTwvaDE+

.

Answer 3

, :

+[WebView registerURLSchemeAsLocal:]

, URL- http:, WebKit http-, .

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Answer 4

WebView.setAllowFileAccessFromFileURLs .