Re: Exception handling with NSURL

[Richard Frith-Macdonald]

On 2007-12-06 08:51:29 +0000 Philippe Roussel <address@hidden> 
wrote:

> Hi all,
>
> I'm trying to verify a string is a valid URL with the following :
>
> - (void)controlTextDidChange:(NSNotification *)notification
> {
>   NS_DURING
>     {
>       NSURL *storeUrl = [NSURL URLWithString:[url stringValue]];
>       [ok setEnabled:(storeUrl != nil)];
>     }
>   NS_HANDLER
>     {
>       NSLog([localException name]);
>       [ok setEnabled:NO];
>     }
>   NS_ENDHANDLER
> }
>
> When I enter an URL of the form http://user:address@hidden, an exception is
> raised (see below) when starting to enter the password because NSURL 
> is
> expecting a numeric port (as in http://host:port). The thing is, the
> exception isn't catched by NS_HANDLER (NSLog is never called) and the
> application coredumps when I enter another caracter.
>
> <NSException: 0x8357318> NAME:NSGenericException REASON:illegal
> character in port part 

<snip>

> Am I doing something wrong ?

My guess is that you are misinterpreting what's happening.

Probably the reason the NSLog() in the exception handler is not called 
is because the handler is not called because the exception is not 
ocurring in this piece of code.  The exception message 'illegal 
character in port part' does not correspond to a URL for the form 
'http://user:address@hidden' because such a URL has no port part, so it's 
presumably being raised because some otyher URL used elsewhere in the 
program has a port part containing an illegal character.