CORS issue with Tomcat and Android Webview

Question

I am facing a strange problem with Tomcat 8 and CORS. I am developing a Hybrid web app using ionicframework, AngularJS, Cordova as front end and Tomcat 8 and Spring 3 as back-en

Answer 1

I did more research on this and figure out the issue.If you see the headers from Android and look into Origin Header.

Origin: file://

Tomcat CORS filter tries to validate the URI in Origin header and considers "file://" as an invalid URI and returns back 403.

     */
    protected static boolean isValidOrigin(String origin) {
       /* // Checks for encoded characters. Helps prevent CRLF injection.
        if (origin.contains("%")) {
            return false;
        }

        URI originURI;

        try {
            originURI = new URI(origin);
        } catch (URISyntaxException e) {
            return false;
        }
        // If scheme for URI is null, return false. Return true otherwise.
        return originURI.getScheme() != null;
*/
        return true;
    }

I need to dig more on why Android is sending the incorrect URI.