背景

公司在https服务器（端口443）进行正常登陆业务等处理
https://ip1:443/
然后在端口444服务器进行资料文件上传等处理
https://ip1:444/
因为服务器在https://ip1:443/登陆成功之后对cookie中的session进行校验保存，而一旦出现访问443->444->443，就是进行文件上传操作后，再调用443端口后，服务器对session校验失败，出现会话超时问题

原因

因为session状态是靠cookie中存储的jsessionid实现的，所以，由于两个服务器的sessionid，名称、域、路径都一样，导致sessionid被覆盖，从而导致session失效；由此也得出cookie是不区分端口的。

cookie不区分端口号
cookie区分域、路径、名称

处理办法

在访问另一个端口前，把cookie缓存到本地，然后在返回443端口后，再把cookie重新写入

导出cookie并缓存:

//导出cookie
    NSHTTPCookieStorage* nCookies = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray* nCookies = [nCookies cookiesForURL:[NSURL URLWithString:urlStr]].copy;
for(NSHTTPCookie*cookie in nCookies)
    {
        if([cookie isKindOfClass:[NSHTTPCookie class]])
        {
            if([cookie.name isEqualToString:@"JSESSIONID"])
            {
                NSNumber*sessionOnly =[NSNumber numberWithBool:cookie.sessionOnly];
                NSNumber*isSecure = [NSNumber numberWithBool:cookie.isSecure];
                NSArray*cookies = [NSArray arrayWithObjects:cookie.name, cookie.value, sessionOnly, cookie.domain, cookie.path, isSecure,nil];
                [[NSUserDefaults standardUserDefaults]setObject:cookies forKey:@"cookies"];
                
                break;
            }
        }
    }

读取cookie并写入:

-(void)loadCookies
{
    NSArray*cookies =[[NSUserDefaults standardUserDefaults]objectForKey:@"cookies"];
    
    if(cookies.count>0)
    {
        NSMutableDictionary*cookieProperties = [NSMutableDictionary dictionary];
        [cookieProperties setObject:[cookies objectAtIndex:0]forKey:NSHTTPCookieName];
        
        [cookieProperties setObject:[cookies objectAtIndex:1]forKey:NSHTTPCookieValue];
        
        [cookieProperties setObject:[cookies objectAtIndex:3]forKey:NSHTTPCookieDomain];
        
        [cookieProperties setObject:[cookies objectAtIndex:4]forKey:NSHTTPCookiePath];
        
        NSHTTPCookie*cookieuser = [NSHTTPCookie cookieWithProperties:cookieProperties];
        
        [[NSHTTPCookieStorage sharedHTTPCookieStorage]setCookie:cookieuser];
        
    }
}

PS:AFNetworking也能用相同处理办法