Re: NSHTTPCookieStorage notification troubles
Re: NSHTTPCookieStorage notification troubles
- Subject: Re: NSHTTPCookieStorage notification troubles
- From: Jerry Krinock <email@hidden>
- Date: Sun, 23 Dec 2007 13:09:26 -0800
On 2007 Dec, 22, at 21:47, Jacob Bandes-Storch wrote:
My application needs to observe changes in the shared cookie storage
so it can check if a certain one changed. I've added it as an
observer to the notification with this:
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateIDField)
name:NSHTTPCookieManagerCookiesChangedNotification
object:nil];
When I delete a cookie from within my application, Safari gets the
message, and with a refresh or two, it takes effect. However, when a
cookie is added in Safari, it seems unreliable whether or not my
application gets the notification. Does this have something to do
with the suspensionBehavior of the observation, maybe?
I've had a similar problem. I believe I found that when cookies are
^deleted^ in Safari, they are still available for other apps for up to
five seconds. I therefore implemented a ten second delay and this has
seemed to work.
I don't remember whether or not I played with the suspensionBehavior,
but you might want to read the top three hits on this in the list
archives for term NSHTTPCookieStorage:
http://www.cocoabuilder.com/search/archive/cocoa?words=NSHTTPCookieStorage
I was going to file this bug a few months ago, but it looks like it
slipped through a crack. If you do, please post the text and number
of your bug report so that others, like me, can file their own bugs
and reference it.
I found the complete code from a little project that I used to test
this. If I recall correctly, it worked better if the observer was a
Foundation tool instead of an application. Run this tool, then log in
and out of a Google account several times and watch what happens.
Sorry my memory on this is a bit foggy. Reply if you have any
specific questions.
#import <Foundation/Foundation.h>
@interface CookieChecker : NSObject {
BOOL _googleLoggedIn ;
}
@end
@implementation CookieChecker
- (void)cookieChomp:(NSNotification*)notification {
NSHTTPCookieStorage* sharedCookieStorage = [NSHTTPCookieStorage
sharedHTTPCookieStorage] ;
NSArray* cookies = [sharedCookieStorage cookies] ;
NSEnumerator* e = [cookies objectEnumerator] ;
NSHTTPCookie* cookie ;
BOOL gotGoogle = NO ;
while ((cookie = [e nextObject])) {
NSString* domain = [cookie domain] ;
if ([domain hasSuffix:@"google.com"]) {
if ([[cookie name] isEqualToString:@"LSID"]) {
gotGoogle = YES ;
break ;
}
}
}
if (gotGoogle) {
NSLog(@"Notification: Google cookie APPEARED") ;
}
else {
NSLog(@"Notification: Google cookie DIS-APPEARED") ;
}
}
- (void)check:(NSTimer*)timer {
NSHTTPCookieStorage* sharedCookieStorage = [NSHTTPCookieStorage
sharedHTTPCookieStorage] ;
NSArray* cookies = [sharedCookieStorage cookies] ;
NSEnumerator* e = [cookies objectEnumerator] ;
NSHTTPCookie* cookie ;
BOOL gotGoogle = NO ;
while ((cookie = [e nextObject])) {
NSString* domain = [cookie domain] ;
if ([domain hasSuffix:@"google.com"]) {
if ([[cookie name] isEqualToString:@"LSID"]) {
gotGoogle = YES ;
break ;
}
}
}
if (gotGoogle != _googleLoggedIn) {
if (gotGoogle) {
NSLog(@"Polling: Google cookie APPEARED") ;
}
else {
NSLog(@"Polling: Google cookie DIS-APPEARED") ;
}
}
_googleLoggedIn = gotGoogle ;
}
@end
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// Same code:
CookieChecker* checker = [[CookieChecker alloc] init] ;
[NSTimer scheduledTimerWithTimeInterval:0.20
target:checker
selector:@selector(check:)
userInfo:nil
repeats:YES] ;
[[NSNotificationCenter defaultCenter] addObserver:checker
selector:@selector(cookieChomp:)
name:NSHTTPCookieManagerCookiesChangedNotification
object:nil] ;
[[NSRunLoop currentRunLoop] run] ;
[pool release];
return 0;
}
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