问题
I'm using kinetic js to build an application using HTML5 canvas where users drag and drop images and then save the final image. It is giving the following error: Unable to get data URL. SecurityError: DOM Exception 18 Please help.
回答1:
It happens when the images drawn onto the canvas and the code are on different server. As quoted from the http://www.html5canvastutorials.com/kineticjs/html5-canvas-stage-data-url-with-kineticjs/:
"The toDataURL() method requires that any images drawn onto the canvas are hosted on a web server with the same domain as the code executing it. If this condition is not met, a SECURITY_ERR exception is thrown"
来源：https://stackoverflow.com/questions/16684784/not-able-to-get-data-url-when-using-images-in-kinetic-js