servlet-reverse-proxy is a Java servlet to play a role of reverse-proxy.
Our front-end webapp uses canvas, we want to take screenshot from canvas, but some images on canvas come from another origin and calling canvas.toDataURL() will throw an error or gets a blank image.
After some googling we found what it is about, see stackoverflow - is-canvas-security-model-ignoring...
and whatwg - security-with-canvas-elements