iPhone: NSHTTPCookie is not saved across app restarts
In my iPhone app, I want to be able to reuse the same server-side session when my app restarts. A session on the server is identified by a cookie, which is sent on each request. When I restart the app, that cookie is gone and I can't use the same session anymore.
What I noticed when I used the NSHTTPCookieStorage to look up the cookie I got from the server, is that [cookie isSessionOnly] returns YES. I get the impression that this is why cookies are not saved across restarts of my app. What would I have to do to make my cookie NOT session only? What HTTP headers do I have to send from the server?
accepted
You can save the cookie by saving its properties dictionary and then restoring as a new cookiebefore you go to re-connect.
Save:
NSArray* allCookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookiesForURL:[NSURL URLWithString:URL]];
for (NSHTTPCookie *cookie in allCookies) {
if ([cookie.name isEqualToString:MY_COOKIE]) {
NSMutableDictionary* cookieDictionary = [NSMutableDictionary dictionaryWithDictionary:[[NSUserDefaults standardUserDefaults] dictionaryForKey:PREF_KEY]];
[cookieDictionary setValue:cookie.properties forKey:URL];
[[NSUserDefaults standardUserDefaults] setObject:cookieDictionary forKey:PREF_KEY];
}
}
Load:
NSDictionary* cookieDictionary = [[NSUserDefaults standardUserDefaults] dictionaryForKey:PREF_KEY];
NSDictionary* cookieProperties = [cookieDictionary valueForKey:URL];
if (cookieProperties != nil) {
NSHTTPCookie* cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
NSArray* cookieArray = [NSArray arrayWithObject:cookie];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookies:cookieArray forURL:[NSURL URLWithString:URL] mainDocumentURL:nil];
}
do you need to synchronize the nsuserdefaults? – Ninja Jan 10 at 8:52
You only need to synchronize if you need to save them right then. Otherwise they will be saved at some interderminate time later. Here's the doc page: developer.apple.com/library/mac/#documentation/Cocoa/Reference/… – Mike Katz Jan 10 at 18:44