Is it possible to know referrer for GURL call received via AppleScript event?

Question

I have a protocol handler associated with my Cocoa application.

[[NSAppleEventManager sharedAppleEventManager] 
    setEventHandler:self
    andSelector:@selector(getUrl:withReplyEvent:)
    forEventClass:kInternetEventClass andEventID:kAEGetURL];    

...

- (void)getUrl:(NSAppleEventDescriptor *)event withReplyEvent:(NSAppleEventDescriptor *)replyEvent
{
#ifdef DEBUG
    NSLog(@"%s: %@",__PRETTY_FUNCTION__,event);
#endif
    NSURL *url = [NSURL URLWithString:[[event paramDescriptorForKeyword:keyDirectObject] stringValue]];
...
}

Who is referrer? (if it called from local machine I think it can be undefined, but if I call this protocol from a Web site... I would like to know domain from which the request is received.

Is it possible at all?

Is there solution to solve this task by another way?

Answer 1

Try inspecting the target of the reply event. That event will be sent back to whatever application sent you the original event, wherever it may be.

If you mean the user is clicking on a link that your application handles, and you want to know the URL of the page that contained the link: There's no way to do that.

Answer 2

From: http://www.cocoabuilder.com/archive/cocoa/125741-finding-the-sender-of-an-appleevent-in-cocoa-app-on-10-2-8-or-greater.html

NSAppleEventDescriptor *addrDesc = [event
attributeDescriptorForKeyword:keyAddressAttr];
NSData *psnData = [[addrDesc
coerceToDescriptorType:typeProcessSerialNumber] data];

if (psnData)
{
 ProcessSerialNumber psn = *(ProcessSerialNumber *) [psnData bytes];
 ...
}