How to get cookie from Webserver and maintain it in iOS app?

问题

I would like to to get fetch JSON from http://mycompany.com/page1...http://mycompany.com/page2... On the the webserver side, it requires initial login http://mycompany.com/login, and after that a cookie is maintained for the user. How do I get this behavior with NSURLConnection without having to ask for login every time? Here is the non-working code using NSURLCredential Storage. Do I need to get the cookie from webservice at loging and then send it along with later requests? I struggled with this for some time, So can you please clarify your answer.

- (IBAction)getJSON:(id)sender
{


NSURLCredential *credential = [NSURLCredential credentialWithUser:@"user"
                                                         password:@"pass"
                                                          persistence:NSURLCredentialPersistenceForSession];

NSURLProtectionSpace *protectionSpace = [[NSURLProtectionSpace alloc]
                                         initWithHost:@"myCompany.com"
                                         port:0
                                         protocol:@"http"
                                         realm:nil
                                         authenticationMethod:nil];

[[NSURLCredentialStorage sharedCredentialStorage] setDefaultCredential:credential
                                                    forProtectionSpace:protectionSpace];


//////////GET JSON//////////////

NSError *error;
NSURL *url = [NSURL URLWithString:@"http://mycompany.com.jsonpage1"];
 NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}

 //I am NOT getting JSON in this delegate
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

NSString *responseString = [[NSString alloc] initWithData:responseData    encoding:NSUTF8StringEncoding];

NSLog(@"%@",responseString);

}

回答1:

Reading cookies:

refer to Managing HTTP Cookies on iPhone

Setting cookie:

... set dictionary with cookie properties, then:

NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:[NSDictionary dictionaryWithObjects:object forKeys:keys]];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];

but keep in mind that session cookies can expire on your server

来源：https://stackoverflow.com/questions/12036512/how-to-get-cookie-from-webserver-and-maintain-it-in-ios-app