WPF一步步开发XMPP IM客户端1：入门

[起因&目标]

因为工作原因接触openfire服务端和spark客户端开发，主要是基于openfire扩展开发了针对企业用途的服务器插件，还开发了各个平台上的客户端(Windows\mac\android\ios\linux)，详情可搜索微信公众号：CVTalk

在开发过程中，发现基于Spark开发Java Swing客户端（公司内部命名CVTalk）比较重，用户体验很难做到和微信客户端看齐，皮肤的开发也比较费力，公司里绝大部分是windows的客户端，而且高清分辨率屏幕的用户越来越多, 那蚂蚁一样的小字和拥挤的布局改造很费劲，内存占用过多的问题也解决不了，swing客户端越发力不从心。

于是，我打算利用业余时间做一个 轻量级、易用、稳定、美观的Windows客户端。并抛砖引玉放开源：https://lightchat.codeplex.com/

坚持轻客户端，体验第一。 目标功能只有7个

1、  单聊

2、  群聊

3、  人员搜索

4、  消息搜索

5、  截屏传输

6、  文件传输

7、  插件扩展平台和企业业务集成接口，及xmpp少量扩展和服务器插件

特性：

• XMPP message、iq、presence、vcard、roster.....
• MUC(Multi-User Chat) support
• Fast localized(sqlite) user search,and Openfire ofUser import & sync
• Easy message search console
• Extensible organizational structure tree interface （Chinese users love it）
• HD resolution screen support
• ...

界面采用Modern UI。布局采用微信PC的方式，即搜索+联系人+聊天窗一体，不开新窗。

第一版的界面，单聊界面

消息搜索：

[项目介绍]

项目目录介绍：

主要类介绍

1、Config.cs:全局设置类

//是否显示即时调试窗口
        public static bool IsDebug = false;
        public static String Version = "0.1";
//@加上bareJid的域名部分
        public static String Domain = "@im";
//注意：这个是域名，一般为该服务器的机器名
        public static String Server = "im";//外网或内网IP,目前AutoResolveConnectServer设置为true也不起作用，只能先改hosts文件
        //public static readonly String ServerIP = "111.63.127.83";
        public static readonly String ResourceName = "LightChat";
        public static readonly bool IsCheckPresence = false;
        public static readonly bool IsCheckChatState = false;
        public static readonly bool AutoAgents = false;
        public static readonly bool AutoPresence = true;
        public static readonly bool AutoRoster = true;

        //### 如果无法登陆，请在hosts文件中关联IP到Server域名 ###//C:\Windows\System32\drivers\etc\hosts  最后一行增加IP映射 比如 111.63.127.83 im
        //自动解析connectserver属性，设置为true就会解析server属性即会利用System.Net.DNS.Resolve方法来将域名映射成ip地址
        public static readonly bool AutoResolveConnectServer = false;
        public static String MeCharacter = "我: ";

        //### Organization structure data source definition  ###
        //### 组织架构数据源定义 ###
        //support：XML\Json\SqliteDB
        //public static IDataSource OrgSource = new XmlDataSource();
        public static IDataSource OrgSource = new DbDataSource();

        //### User search data source ###
        //### 用户搜索数据源 ###
        public static IResultsProvider SearchSource = new UserSearchProvider();

用户搜索数据源，使用统一的返回结果接口IResultsProvider

public static IResultsProvider SearchSource = new UserSearchProvider();

使用接口的目的是使业务代码具有扩展性，比如组织架构数据源实现松耦合的具体实现。

2、登陆类： LightChat.Pages.Login

代码

/// <summary>
    /// Login.xaml 的交互逻辑
    /// </summary>
    public partial class Login : UserControl
    {

        public Login()
        {
            InitializeComponent();
            //读取设置
            this.Dispatcher.BeginInvoke(new Action(LoadSettings), null);
        }

        private void btnLogin_Click(object sender, RoutedEventArgs e)
        {
            LoginTalk();
        }

        private void LoginTalk()
        {
            this.Dispatcher.BeginInvoke(new Action(BusyRun), null);

            if (tbxUsername.Text.Trim() == "")
            {
                ModernProgressRing mpr = new ModernProgressRing();
                ModernDialog.ShowMessage("注意：您的账户名未填写。", "提示",MessageBoxButton.OK);
                return;
            }
            if (tbxPassword.Password == "")
            {
                ModernDialog.ShowMessage("注意：您的账户名未填写。", "提示", MessageBoxButton.OK);
                return;
            }

            LoginXMPP();
            SaveSettingsDB();
        }
        /// <summary>
        /// 执行登录
        /// </summary>
        private void LoginXMPP()
        {
            XmppStatic.xmppCon = new XmppClientConnection();
            XmppStatic.xmppCon.Server = Config.Server;
            XmppStatic.xmppCon.Username = tbxUsername.Text.Trim();
            XmppStatic.xmppCon.Password = tbxPassword.Password;
            XmppStatic.xmppCon.Resource = Config.ResourceName;
            XmppStatic.xmppCon.Priority = ;
            XmppStatic.xmppCon.AutoAgents = Config.AutoAgents;
            XmppStatic.xmppCon.AutoPresence = Config.AutoPresence;
            XmppStatic.xmppCon.AutoRoster = Config.AutoRoster;
            XmppStatic.xmppCon.AutoResolveConnectServer = Config.AutoResolveConnectServer;
            XmppStatic.xmppCon.UseStartTLS = true;
            XmppStatic.xmppCon.ClientVersion = "1.0";
            XmppStatic.xmppCon.Capabilities.Node = "http://www.cvtalk.cn/caps";
            SetDiscoInfo();

            try
            {
                //登录事件，异步
                XmppStatic.xmppCon.OnLogin += new ObjectHandler(xmppCon_OnLogin);
                //socket断开事件
                XmppStatic.xmppCon.OnClose += new ObjectHandler(xmppCon_OnClose);
                //连接XMPP服务
                XmppStatic.xmppCon.Open();
                XmppStatic.SelfJID = new Jid(tbxUsername.Text.Trim() + Config.Domain +
                    "/"+ Config.ResourceName);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

        }

        private void xmppCon_OnClose(object sender)
        {
            this.Dispatcher.BeginInvoke(new Action(UIChangeOnClose), null);
        }

        /// <summary>
        /// 断线后的UI改变，需要后续开发断线重连
        /// </summary>
        private void UIChangeOnClose()
        {
            UIStatic.mainHome.SetLogText("连接关闭");
            //todo : 自动重连逻辑...
        }

        /// <summary>
        /// 登录后的UI改变
        /// </summary>
        /// <param name="sender"></param>
        void xmppCon_OnLogin(object sender)
        {
            this.Dispatcher.BeginInvoke(new Action(UIChangeOnLogin), null);
        }

        private void UIChangeBeforeLogin()
        {

        }
        private void UIChangeOnLogin()
        {
            tbxUsername.IsEnabled = false;
            tbxPassword.IsEnabled = false;
            btnLogin.IsEnabled = false;
            //设置主窗体的Tab展示
            UIStatic.mainWindow.SetBussTabText("Work");
            UIStatic.mainWindow.SetHomeTabText("Chat");
            UIStatic.mainWindow.SetHomeTabText();

            UIStatic.mainWindow.ContentSource = new System.Uri("/Pages/Home.xaml", UriKind.Relative);
            BusyStop();

            //VersionIq viq = new VersionIq(IqType.get, new Jid("wangxin@im/PC"), new Jid("zz@im"));
            //xmppCon.Send(viq);

            //DiscoManager dmg = new DiscoManager(xmppCon);
            //dmg.DiscoverInformation(new Jid("im"));

            //LastIq lastIq = new LastIq(IqType.get, new Jid("wangxin@im/PC"));
            //XmppStatic.xmppCon.Send(lastIq);

            PrivateIq privateIq = new PrivateIq(IqType.get);
            privateIq.Query.Storage = new agsXMPP.protocol.extensions.bookmarks.Storage();
            XmppStatic.xmppCon.IqGrabber.SendIq(privateIq, new IqCB(PrivateIqResult), null);

            ///SearchIq searchIq = new SearchIq(IqType.set, new Jid("search.im"));
            //searchIq.Query.Email = "wangx";
            //xmppCon.Send(searchIq);

            //VcardIq vcardIq = new VcardIq();
            //vcardIq.Type = IqType.get;
            //vcardIq.To = new Jid("wangxin@im");
            //XmppStatic.xmppCon.IqGrabber.SendIq(vcardIq, new IqCB(VcardIqResult), null);

            //BookmarkManager bkmg = new BookmarkManager(XmppStatic.xmppCon);
            //bkmg.RequestBookmarks();
        }

        private void VcardIqResult(object sender, IQ iq, object data)
        {
            if (iq.Type == IqType.result)
            {
                Vcard vcard = iq.Vcard;
                if (vcard != null)
                {
                    string fullname = vcard.Fullname;
                    string nickname = vcard.Nickname;
                    string description = vcard.Description;
                    Photo photo = vcard.Photo;
                }
            }
        }

        //获取MUC会议室书签Bookmarks
        private void PrivateIqResult(object sender, IQ iq, object data)
        {

            if (iq.Type == IqType.result)
            {
                Private piq = iq.Query as Private;
                if (piq != null)
                {
                    if (piq.HasChildElements)
                    {
                        XmppStatic.Conferences = ((Storage)piq.FirstChild).GetConferences();
                    }
                }
            }
        }

        /// <summary>
        /// 设置本地客户端XMPP发现服务
        /// </summary>
        private void SetDiscoInfo()
        {
            XmppStatic.xmppCon.DiscoInfo.AddIdentity(new DiscoIdentity("pc", "cvtalk", "client"));

            XmppStatic.xmppCon.DiscoInfo.AddFeature(new DiscoFeature(agsXMPP.Uri.DISCO_INFO));
            XmppStatic.xmppCon.DiscoInfo.AddFeature(new DiscoFeature(agsXMPP.Uri.DISCO_ITEMS));
            XmppStatic.xmppCon.DiscoInfo.AddFeature(new DiscoFeature(agsXMPP.Uri.MUC));

            // for testing to bypass disco caches
            //_connection.DiscoInfo.AddFeature(new DiscoFeature(Guid.NewGuid().ToString()));
        }

        private void LoadSettings()
        {
            //建立数据库
            CreateSaveTable.InitDB();

            //读取设置，用户记住用户名、密码等
            DataTable dtSelect = LoadTable.LoadSettings();

            if (dtSelect == null || dtSelect.Rows.Count < ) //没有数据
            {
                chkRememberPSW.IsChecked = true;
            }
            else
            {
                tbxUsername.Text = dtSelect.Rows[]["Jid"] + "";
                tbxPassword.Password = dtSelect.Rows[]["Password"] + "";
                chkRememberPSW.IsChecked = dtSelect.Rows[]["RememberPSW"] + "" == "true" ? true : false;
                chkAutomatic.IsChecked = dtSelect.Rows[]["Automatic"] + "" == "true" ? true : false;
            }

        }

        /// <summary>
        /// 保存本地设置
        /// </summary>
        private void SaveSettingsDB()
        {
            CreateSaveTable.SaveSettingsDB(tbxUsername.Text, tbxPassword.Password, (bool)chkRememberPSW.IsChecked, (bool)chkAutomatic.IsChecked);
        }

        private void tbxPassword_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                //enter key is down
                LoginTalk();
            }
        }

        private void BusyRun()
        {
            //busyr.IsBusy = true;
            this._loading.Visibility = Visibility.Visible;
        }

        private void BusyStop()
        {
            //busyr.IsBusy = false;
            this._loading.Visibility = Visibility.Collapsed;
        }

    }

3、主窗体： LightChat.Pages.Home

区域介绍

代码下载地址：https://lightchat.codeplex.com/

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