[GitHub] 5r1m opened a new issue #79: Canvas gets tainted when loaded with an image using the custom scheme

[GitBox <gi...@apache.org>]

5r1m opened a new issue #79: Canvas gets tainted when loaded with an image using the custom scheme
URL: https://github.com/apache/cordova-plugin-wkwebview-engine/issues/79
 
 
   **Details:**
   We are migrating from UIWebview to wkWebview for iOS, we got in to problem where Canvas gets tainted when loaded with an image using the custom scheme
   
   **Problem**
   For iOS, we are using setURLSchemeHandler to load the resources from Library folder. Resources (images, videos, pdfs etc) are loaded fine after doing necessary additions to meta tag to allow the new custom scheme being used. How ever canvas is getting tainted when we draw the image using the custom scheme and throws security CORS error when tried to get the canvas data using toDataURL.
   
   I see error message "_SecurityError: The operation is insecure._" on call to toDataURL in console.
   
   I know wkwebview is having issues( or strict) with CORS but as per document (https://cordova.apache.org/docs/en/latest/guide/appdev/whitelist/) this issue should not occur even for Canvas with _access origin='*'_ setting and custom scheme file loading, when its working fine for other elements.
   
   **Note:** toDataURL works fine when Image element being drawn is set with base64 data instead of url with custom scheme
   
   **Environment:**
   iPad pro with iOS 12.1.3
   cordova-plugin-wkwebview-engine : 1.1.4
   
   Is this a bug in the cordova-plugin-wkwebview-engine?

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