在Silverlight开发基于http协议客户端连接器(三)

下面应用前面设计的这个连接器演练一个登录服务并保持session。

先定消息，就是用LoginMessage好了。

这里说明一下，很多页面访问的时候都是需要验证的，比如qq、178的游戏页面都会包含appid，sessionkey，uid之类的信息，这样就能够防止非注册用户访问他们的webgame。所以我们还要收集html中的这些数据用于登录用。在silverlight中可以通过HTML Bridge来获取DOM，其实用起来也很简单，在js中写function，再在sl中调用HtmlPage.Window.Invoke(方法名，参数名……)。

下面是获取某页面验证信息用的的工具类：

public static class PageMessageUtil
   {
       public static PageSignEntity GetData()
       {
           if ((string)HtmlPage.Window.Invoke("get178PageData", "178_sig_uid") != "")
           {
               var entity = new PageSignEntity();
               entity.Id = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_uid");
               entity.Signtime = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_time");
               entity.Appid = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_appId");
               entity.Appversion = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_v");
               entity.Isaddapp = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_added");
               entity.Sessionkey = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_sessionId");
               entity.Friendlist = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_friends");
               entity.Signsumber = (string)HtmlPage.Window.Invoke("get178PageData", "178_sig_key");
               return entity;
           }
           else
           {
               MessageBox.Show("没有给定参数");
               System.Diagnostics.Debug.WriteLine("没有给定参数");
               return null;
           }
       }
   }

public class PageSignEntity
    {
        public PageSignEntity()
        {
        }
        public string Id { get; set; }
        public string Signtime { get; set; }
        public string Appid { get; set; }
        public string Appversion { get; set; }
        public string Isaddapp { get; set; }
        public string Sessionkey { get; set; }
        private string friendList;
        public string Friendlist
        {
            get { return friendList; }
            set
            {
                friendList = value ?? string.Empty;
            }
        }
        public string Signsumber { get; set; }
    }

继承Message，设置有效的url参数

public class LoginMessage : Message
    {
        public  readonly static string Uid = "178_sig_uid";
        public readonly static string Signtime = "178_sig_time";
        public readonly static string Appid = "178_sig_appId";
        public readonly static string Appversion = "178_sig_v";
        public readonly static string Isaddapp = "178_sig_added";
        public readonly static string Sessionkey = "178_sig_sessionId";
        public readonly static string Friendlist = "178_sig_friends";
        public readonly static string Signsumber = "178_sig_key";
        public LoginMessage()
        {
            init();
        }
        public LoginMessage(PageSignEntity dataEntity)
        {
            init();
            base.Parameters[LoginMessage.Uid] = dataEntity.Id;
            base.Parameters[LoginMessage.Appid] = dataEntity.Appid;
            base.Parameters[LoginMessage.Appversion] = dataEntity.Appversion;
            base.Parameters[LoginMessage.Signtime] = dataEntity.Signtime;
            base.Parameters[LoginMessage.Signsumber] = dataEntity.Signsumber;
            base.Parameters[LoginMessage.Sessionkey] = dataEntity.Sessionkey;
            base.Parameters[LoginMessage.Isaddapp] = dataEntity.Isaddapp;
            base.Parameters[LoginMessage.Friendlist] = dataEntity.Friendlist;
        }
        private void init()
        {
            base.MessageId = "10000";
            //可以用反射少些代码，或用code generater的方式
            base.AvaliableParameterNames.Add(Uid);
            base.AvaliableParameterNames.Add(Signtime);
            base.AvaliableParameterNames.Add(Appid);
            base.AvaliableParameterNames.Add(Appversion);
            base.AvaliableParameterNames.Add(Isaddapp);
            base.AvaliableParameterNames.Add(Sessionkey);
            base.AvaliableParameterNames.Add(Friendlist);
            base.AvaliableParameterNames.Add(Signsumber);
        }
    }

我们从WebConnectorContext继承来一个LkDemoDomainService。

public class LkDemoDomainService : WebConnectorContext
    {
        public LkDemoDomainService(string baseAddress)
            : base(baseAddress)
        {

        }
        public void LoginGameFromPageSign()
        {
            LoginGameFromPageSign("http://localhost:8085/igscdemo/login.sa");
        }
        public void LoginGameFromPageSign(string loginUrl)
        {

            var msg = new LoginMessage(PageMessageUtil.GetData());
            var loginService = new LkDemoDomainService(loginUrl);
        }

        public  void Login(Message msg, Action<WebClientWrapper, string> action)
        {
           loginService.AddMessageToSend(msg, (client, s) =>
            {

                //解析返回的结果，略
                base.AppCookie = loginService.AppCookie;//保存用户sessionid等

               //提示登录结果，略
            });

        }

        public override void AddMessageToSend(Message msg, Action<WebClientWrapper, string> action)
        {
            base.AddMessageToSend(msg, action);
        }
    }

之后我们假如有LichKingGameDomainService继承于WebConnectorContext，只需将登录的AppCookie设置给LichKingGameDomainService对象即可使LichKingGameDomainService对象发送出去的消息含有用户的sessionid等cookie值。