Question

Is there a method to this madness? I am trying to build a browser app for a kiosk that restrict much need for running additional applications and simply stay within one website.

I research and found decidePolicyForNavigationAction should work for what I want, but how do I start filtering URI schemes (mailto://, irc://, etc.)? Thanks!

Answer 1

You’re implementing a WebView in your application to browse the web, right?
If yes, look into the WebPolicyDelegate Protocol reference.
Especially the following delegate might be of interest:

               - (void)webView:(WebView *)webView 
decidePolicyForNewWindowAction:(NSDictionary *)actionInformation 
                       request:(NSURLRequest *)request 
                  newFrameName:(NSString *)frameName 
              decisionListener:(id < WebPolicyDecisionListener >)listener

Using the above delegate, you can validate any request, including mailto requests.
Quick example how to detect the URL scheme and decide wether to block:

NSLog(@"Request URL scheme = %@",[[request URL] scheme]);
if([[[request URL] scheme]isEqualToString:@"mailto"])
{
    [listener ignore]; // Block Request
} 
else 
{
    [listener use]; // Allow Request
}