NSHTTPCookieStorage
NSHTTPCookieStorage
xiaobai1315 发表于2年前
NSHTTPCookieStorage
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摘要: NSHTTPCookieStorage


 cookie机制采用的是在客户端保持 HTTP 状态信息的方案 

Cookie是在浏览器访问WEB服务器的某个资源时,由WEB服务器在HTTP响应消息头中附带传送给浏览器的一个小文本文件。 
一旦WEB浏览器保存了某个Cookie,那么它在以后每次访问该WEB服务器时,都会在HTTP请求头中将这个Cookie回传给WEB服务器。 
底层的实现原理: WEB服务器通过在HTTP响应消息中增加Set-Cookie响应头字段将Cookie信息发送给浏览器,浏览器则通过在HTTP请求消息中增加Cookie请求头字段将Cookie回传给WEB服务器。 
一个Cookie只能标识一种信息,它至少含有一个标识该信息的名称(NAME)和设置值(VALUE)。 
一个WEB站点可以给一个WEB浏览器发送多个Cookie,一个WEB浏览器也可以存储多个WEB站点提供的Cookie。 
浏览器一般只允许存放300个Cookie,每个站点最多存放20个Cookie,每个Cookie的大小限制为4KB。

 

一、NSHTTPCookieStorage  【转自 http://rainbird.blog.51cto.com/211214/805173】

一 直以为ios的http请求这块很简单应该不支持记录,保存,或者使用cookie,可是想当然归想当然,真用的时候,真研究了一下发现还真强大。经过一 番的研究简单说一下我的理解:当你访问一个网站时,不管你愿意或者不愿意,NSURLRequest都会帮你主动记录下来你访问的站点设置的 cookie,而且很负责任的,当你下次再访问这个站点时,NSURLRequest会拿着上次保存下来了的cookie继续去请求。这规律同样适用于 ASIHTTPRequest。所以当你做一些基于认证的网络请求时,cookie不失为一个完美的解决方案。

那么怎么查看cookie呢?很简单:

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
for (NSHTTPCookie *cookie in [cookieJar cookies]) {
   NSLog(@"%@", cookie);
}

这样就列出了所有已保存的cookie,如果当前为空怎么办呢?随便请求一个url喽。

复制代码

NSURLRequest *request = [NSURLRequest requestWithURL:
[NSURL URLWithString:@"http://blog.cnrainbird.com"]
                                           cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData    timeoutInterval:3];
  
  [NSURLConnection sendSynchronousRequest:request 
                        returningResponse:nil
                                    error:nil];
  
  NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
  for (NSHTTPCookie *cookie in [cookieJar cookies]) {
    NSLog(@"%@", cookie);
  }

复制代码

 

是不是得到了类似:

1

<NSHTTPCookie version:0 name:"PHPSESSID" value:"evf5rcboo8th1dnl53fs4ukmt2" expiresDate:(null) created:2012-03-13 14:28:13 +0000 (3.53342e+08) sessionOnly:TRUE domain:"blog.cnrainbird.com" path:"/" isSecure:FALSE>

的东东?这就是cookie啦

怎么清空cookie呢?

NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
  NSArray *_tmpArray = [NSArray arrayWithArray:[cookieJar cookies]];
  for (id obj in _tmpArray) {
    [cookieJar deleteCookie:obj];
  }

 

这样cookie就消失的一干二净了。

会查看cookie了,也会清空cookie了,怎么设置指定的cookie呢?

复制代码

NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
  [cookieProperties setObject:@"username" forKey:NSHTTPCookieName];
  [cookieProperties setObject:@"rainbird" forKey:NSHTTPCookieValue];
  [cookieProperties setObject:@"cnrainbird.com" forKey:NSHTTPCookieDomain];
  [cookieProperties setObject:@"cnrainbird.com" forKey:NSHTTPCookieOriginURL];
  [cookieProperties setObject:@"/" forKey:NSHTTPCookiePath];
  [cookieProperties setObject:@"0" forKey:NSHTTPCookieVersion];
 
  NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
  [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];

复制代码

这样就可以了。输入一下,是不是得到了下面这样的结果:

1

<NSHTTPCookie version:0 name:"username" value:"rainbird" expiresDate:(null) crea

 二、

1.NSHttpCookiesStorage是一个单例,管理所有的Cookie,每个Cookie都是一个NSHTTPCookie的实例,所有应用的cookies都被保存在这个NSHTTPCookieStorage的单例中,并且跨进程同步。  但为了安全,每个应用都有自己的沙盒,A应用的cookie是不能被B应用访问的。

                             iOS Note: Cookies are not shared among applications in iOS.

2. cookie的接收模式有3种

NSHTTPCookieAcceptPolicyAlways,
NSHTTPCookieAcceptPolicyNever,
NSHTTPCookieAcceptPolicyOnlyFromMainDocumentDomain

如果改变cookie的接收模式,会影响所有当前正在使用cookie storage正在运行的应用。

  Note: Changes made to the cookie accept policy affect all currently running applications using the cookie storage.

 

 3.Session cookies (where the cookie object’s isSessionOnly method returns YES) are local to a single process and are not shared.

 

4.NSHTTPCookieStorage的问题,即当更改或者删除一个cookie时,NSHTTPCookieStorage不是立即接收NSHTTPCookieManagerCookiesChangedNotification,然后进行更改,而是有5s的延迟,

参考:http://stackoverflow.com/questions/5837702/nshttpcookiestorage-state-not-saved-on-app-exit-any-definitive-knowledge-docume

http://www.cocoabuilder.com/archive/cocoa/195413-nshttpcookiestorage-notification-troubles.html

 

一般解决方法是把cookie手动的保存,隔一段时间刷新,程序启动时再从NSDefaultUser中读出


NSHTTPCookieStorage state not saved on app exit. Any definitive knowledge/documentation out there?

I also got the same problem but i found a solution. I saved the cookies as it get created by the browser and then recreate them as app restarts.

1) Save cookie when they get created by uiwebview.

 NSMutableArray *cookieArray = [[NSMutableArray alloc] init];
    for (NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
        [cookieArray addObject:cookie.name];
        NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
        [cookieProperties setObject:cookie.name forKey:NSHTTPCookieName];
        [cookieProperties setObject:cookie.value forKey:NSHTTPCookieValue];
        [cookieProperties setObject:cookie.domain forKey:NSHTTPCookieDomain];
        [cookieProperties setObject:cookie.path forKey:NSHTTPCookiePath];
        [cookieProperties setObject:[NSNumber numberWithInt:cookie.version] forKey:NSHTTPCookieVersion];

        [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];

        [[NSUserDefaults standardUserDefaults] setValue:cookieProperties forKey:cookie.name];
        [[NSUserDefaults standardUserDefaults] synchronize];

    }

    [[NSUserDefaults standardUserDefaults] setValue:cookieArray forKey:@"cookieArray"];
    [[NSUserDefaults standardUserDefaults] synchronize];

2) Now recreate them as app restarts:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    NSMutableArray* cookieDictionary = [[NSUserDefaults standardUserDefaults] valueForKey:@"cookieArray"];
     NSLog(@"cookie dictionary found is %@",cookieDictionary);

    for (int i=0; i < cookieDictionary.count; i++) 
{


        NSLog(@"cookie found is %@",[cookieDictionary objectAtIndex:i]);
        NSMutableDictionary* cookieDictionary1 = [[NSUserDefaults standardUserDefaults] valueForKey:[cookieDictionary objectAtIndex:i]];
        NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieDictionary1];
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];


 }

    // other code

}

I also got the same problem but i found a solution. I saved the cookies as it get created by the browser and then recreate them as app restarts.

1) Save cookie when they get created by uiwebview.

 NSMutableArray *cookieArray = [[NSMutableArray alloc] init];
    for (NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
        [cookieArray addObject:cookie.name];
        NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
        [cookieProperties setObject:cookie.name forKey:NSHTTPCookieName];
        [cookieProperties setObject:cookie.value forKey:NSHTTPCookieValue];
        [cookieProperties setObject:cookie.domain forKey:NSHTTPCookieDomain];
        [cookieProperties setObject:cookie.path forKey:NSHTTPCookiePath];
        [cookieProperties setObject:[NSNumber numberWithInt:cookie.version] forKey:NSHTTPCookieVersion];

        [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];

        [[NSUserDefaults standardUserDefaults] setValue:cookieProperties forKey:cookie.name];
        [[NSUserDefaults standardUserDefaults] synchronize];

    }

    [[NSUserDefaults standardUserDefaults] setValue:cookieArray forKey:@"cookieArray"];
    [[NSUserDefaults standardUserDefaults] synchronize];

2) Now recreate them as app restarts:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    NSMutableArray* cookieDictionary = [[NSUserDefaults standardUserDefaults] valueForKey:@"cookieArray"];
     NSLog(@"cookie dictionary found is %@",cookieDictionary);

    for (int i=0; i < cookieDictionary.count; i++) 
{


        NSLog(@"cookie found is %@",[cookieDictionary objectAtIndex:i]);
        NSMutableDictionary* cookieDictionary1 = [[NSUserDefaults standardUserDefaults] valueForKey:[cookieDictionary objectAtIndex:i]];
        NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieDictionary1];
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];


 }

    // other code

}

I also got the same problem but i found a solution. I saved the cookies as it get created by the browser and then recreate them as app restarts.

1) Save cookie when they get created by uiwebview.

 NSMutableArray *cookieArray = [[NSMutableArray alloc] init];
    for (NSHTTPCookie *cookie in [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies]) {
        [cookieArray addObject:cookie.name];
        NSMutableDictionary *cookieProperties = [NSMutableDictionary dictionary];
        [cookieProperties setObject:cookie.name forKey:NSHTTPCookieName];
        [cookieProperties setObject:cookie.value forKey:NSHTTPCookieValue];
        [cookieProperties setObject:cookie.domain forKey:NSHTTPCookieDomain];
        [cookieProperties setObject:cookie.path forKey:NSHTTPCookiePath];
        [cookieProperties setObject:[NSNumber numberWithInt:cookie.version] forKey:NSHTTPCookieVersion];

        [cookieProperties setObject:[[NSDate date] dateByAddingTimeInterval:2629743] forKey:NSHTTPCookieExpires];

        [[NSUserDefaults standardUserDefaults] setValue:cookieProperties forKey:cookie.name];
        [[NSUserDefaults standardUserDefaults] synchronize];

    }

    [[NSUserDefaults standardUserDefaults] setValue:cookieArray forKey:@"cookieArray"];
    [[NSUserDefaults standardUserDefaults] synchronize];

2) Now recreate them as app restarts:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    NSMutableArray* cookieDictionary = [[NSUserDefaults standardUserDefaults] valueForKey:@"cookieArray"];
     NSLog(@"cookie dictionary found is %@",cookieDictionary);

    for (int i=0; i < cookieDictionary.count; i++) 
{


        NSLog(@"cookie found is %@",[cookieDictionary objectAtIndex:i]);
        NSMutableDictionary* cookieDictionary1 = [[NSUserDefaults standardUserDefaults] valueForKey:[cookieDictionary objectAtIndex:i]];
        NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieDictionary1];
        [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];


 }

    // other code

}


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