Cross-origin image load denied by Cross-Origin Resource Sharing policy

Question

I use html2canvas (from html2canvas.hertzen.com) to capture screenshot. I got this strange error like this: The code of my webpage is put on one host, say Host A. If my webpag

Answer 1

If you wish to load cross-origin images to a canvas, you need to either serve the image with cross-origin headers or under the same origin. That image under Facebook is served with the following header option set:

Access-Control-Allow-Origin:*

Meaning, it can be cross-origin loaded with the useCORS option. However, it would appear that your Host B isn't serving them with cross-origin headers set.