Synnefo » Pithos MS Client

#region

/* -----------------------------------------------------------------------

 * <copyright file="App.xaml.cs" company="GRNet">

 * 

 * Copyright 2011-2012 GRNET S.A. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or

 * without modification, are permitted provided that the following

 * conditions are met:

 *

 *   1. Redistributions of source code must retain the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer.

 *

 *   2. Redistributions in binary form must reproduce the above

 *      copyright notice, this list of conditions and the following

 *      disclaimer in the documentation and/or other materials

 *      provided with the distribution.

 *

 *

 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 *

 * The views and conclusions contained in the software and

 * documentation are those of the authors and should not be

 * interpreted as representing official policies, either expressed

 * or implied, of GRNET S.A.

 * </copyright>

 * -----------------------------------------------------------------------

 */

#endregion

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Net;

using System.Reflection;

using System.Security.Cryptography;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows;

using Caliburn.Micro;

using Pithos.Client.WPF.Configuration;

using Pithos.Client.WPF.Properties;

using Pithos.Interfaces;

using Pithos.Network;

using log4net.Appender;

using log4net.Core;

using log4net.Repository.Hierarchy;

using System.Runtime.InteropServices;

namespace Pithos.Client.WPF

{

    /// <summary>

    /// Interaction logic for App.xaml

    /// </summary>

    public partial class App : Application

    {

        private static readonly log4net.ILog Log = log4net.LogManager.GetLogger( MethodBase.GetCurrentMethod().DeclaringType );

            //DLL Import to add restart manager support

            [DllImport("kernel32.dll", CharSet = CharSet.Auto)]

            public static extern Int32 RegisterApplicationRestart(String commandLineArgs, UInt32 flags);

        public App()

        {            

            //var instanceMutex=new Mutex()

            InitializeLogging();

            RegisterOpenSSL();

            //Detect OS, if Major Version is 6+ use RestartManager

            OperatingSystem os = Environment.OSVersion;

            Version vs = os.Version;

            //Register Application in the Restartmanager service

            Log.DebugFormat("OS: [{0}]", vs.Major);

            if (vs.Major > 5)

            {

                Int32 result = RegisterApplicationRestart(null, 0);

                Log.DebugFormat("RM Result: [{0}]", result);

            }

            DispatcherUnhandledException += OnDispatcherUnhandledException;

            AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;

            TaskScheduler.UnobservedTaskException += OnUnobservedException;

            //Fix incorrect proxy settings by switching to default proxy, if the proxy server settings is empty

            if (Settings.Default.UseManualProxy && String.IsNullOrWhiteSpace(Settings.Default.ProxyServer))

            {

                Settings.Default.UseManualProxy = false;

                Settings.Default.UseDefaultProxy = true;

            }

            if (Settings.Default.IgnoreCertificateErrors)

                ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, errors) => true;

            ServicePointManager.Expect100Continue = false;

            InitializeComponent();            

        }

        private static void RegisterOpenSSL()

        {

            //Try to instantiate OpenSSL and hash an empty array

            try

            {

                using(var testHasher=new SHA256OpenSSL())

                {

                    testHasher.ComputeHash(new byte[0]);

                }

                CryptoConfig.AddAlgorithm(typeof(SHA256OpenSSL), "SHA256");

                Log.InfoFormat("Registered OpenSSL hash provider");

            }

            catch (Exception exc)

            {

                Log.WarnFormat("OpenSSL instantiation failed. Falling back to CNG provider.\r\n[{0}]",exc);                

            }

            //Running on Vista + ?

            if (Environment.OSVersion.Version.Major >= 6)

            {

                CryptoConfig.AddAlgorithm(typeof(SHA256Cng), "SHA256");

                Log.InfoFormat("Registered CNG hash provider");

            }

            else

            {

                Log.WarnFormat("Running on XP. Falling back to default hash algorithm.");

            }

        }

/*        private static string[] platformLibraries = {"libeay32.dll","ssleay32.dll"};

        private static Assembly CustomResolve(object sender,ResolveEventArgs args)

        {

            if (platformLibraries.Contains(args.Name))

            {

                var platformPath = Path.Combine(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITECTURE")

                                                + args.Name);

                string fileName = Path.GetFullPath( platformPath);

                if (File.Exists(fileName))

                {

                    if (Log.IsDebugEnabled)

                        Log.DebugFormat("[PLATFORM] Loading {0}", fileName);

                    return Assembly.LoadFile(fileName);

                }

                else

                {

                    Log.ErrorFormat("Platform specific file [{0}] not found",fileName);

                }

            }

            return null;

        }*/

/*

        private void OnUpdateDetected(object sender, UpdateDetectedEventArgs e)

        {

            Log.InfoFormat("Update Detected {0}",e.LatestVersion.Version);    

        }

*/

        private static void InitializeLogging()

        {

            log4net.Config.XmlConfigurator.Configure();

            try

            {

                var pithosDataPath = PithosSettings.PithosDataPath;

                if (!Directory.Exists(pithosDataPath))

                    Directory.CreateDirectory(pithosDataPath);

                var loggerRepository = (Hierarchy)log4net.LogManager.GetRepository();

                var appenders = loggerRepository.GetAppenders();

/*

                var lossyAppender = appenders.OfType<BufferingForwardingAppender>()

                    .FirstOrDefault(appender => appender.Name == "LossyFileAppender");

                if (lossyAppender!=null)

                {

                    var dumpAppender = lossyAppender.Appenders.OfType<RollingFileAppender>().First();

                    dumpAppender.File = Path.Combine(pithosDataPath, "errorlog.xml");

                    dumpAppender.ActivateOptions();

                }

*/

                var debugAppender =appenders.OfType<RollingFileAppender>()

                    .FirstOrDefault(a => a.Name == "DebugFileAppender");

                if (debugAppender != null)

                {

                    //debugAppender.File = Path.Combine(pithosDataPath, "debuglog.xml");

                    if (!Settings.Default.DebugLoggingEnabled)

                    {

                        debugAppender.Threshold = Level.Off;

                        debugAppender.ActivateOptions();

                    }

                }

            }

            catch (Exception exc)

            {

                Log.Error("Dumpl appender initialization failed",exc);                

            }

        }

        private Mutex _singleInstanceMutex;

        protected override void OnStartup(StartupEventArgs e)

        {

            if (!Settings.Default.StartOnSystemStartup && e.Args.Contains("startup"))

            {

                Shutdown();

                return;

            }

            bool firstInstance;

            _singleInstanceMutex = new Mutex(false, "PITHOSMUTEX", out firstInstance);

            if (!firstInstance)

            {

                _singleInstanceMutex.Dispose();

                _singleInstanceMutex = null;

                Log.Warn("An instance of Pithos+ is already running. Terminating.");

                Shutdown();

                return;

            }

            //Delay during startup

            if (e.Args.Contains("startup"))

            {

                if (Settings.Default.StartupDelay>TimeSpan.Zero)

                    Thread.Sleep(Settings.Default.StartupDelay);

            }

            var splashScreen = new SplashScreen("images/pithos_logo-title-margin-splash-600-whitebg.png");

            splashScreen.Show(true);

            base.OnStartup(e);

        }

        protected override void OnExit(ExitEventArgs e)

        {

            try

            {

                if (_singleInstanceMutex!=null)

                    _singleInstanceMutex.Dispose();

                _singleInstanceMutex = null;

            }

            catch { }

            base.OnExit(e);

        }

        private void OnUnobservedException(object sender, UnobservedTaskExceptionEventArgs e)

        {

            Log.Error("Unobserved Task Exception", e.Exception); 

            var messages = new List<UserMessage>();

            e.Exception.Handle(exc=>{

                messages.Add(new UserMessage

                {

                    Message = "Unexpected Exception",

                    Details = exc.ToString(),

                    Severity = Severity.Error

                });

                return true;

            });

            //Do not display any messages if this is a 304 code

            var ignoreExceptions = from exc in e.Exception.InnerExceptions.OfType<WebException>()

                                   where IsAllowedException(exc)

                                   select exc;

            if (ignoreExceptions.Any())

            {

                e.SetObserved();

                return;

            }

           /* var message = String.Format(@"{0}" + Environment.NewLine + "{1}" + Environment.NewLine + "{2}", 

                WPF.Properties.Resources.Unexpected_Error,

                WPF.Properties.Resources.We_Apologize, 

                WPF.Properties.Resources.Please_Submit_Error);

            ShowMessages("Oops!",message, messages);*/

            e.SetObserved();            

        }

        private bool IsAllowedException(Exception exc)

        {

            var we = exc as WebException;

            if (we==null)

            {

                return false;

            }

            var response = we.Response as HttpWebResponse;

            return (response != null && response.StatusCode == HttpStatusCode.NotModified);

        }

        private void OnUnhandledException(object sender, UnhandledExceptionEventArgs e)

        {

            //Do not display any messages if this is a 304 code

            if (IsAllowedException(e.ExceptionObject as Exception))

            {

                return;

            }

            if (e.ExceptionObject is ReflectionTypeLoadException)

            {

                var les=(ReflectionTypeLoadException) e.ExceptionObject;

                Log.Error("Unhandled exception", les);

                foreach (var le in les.LoaderExceptions)

                {

                    Log.Error("Dll load error", le);    

                }

            }

            else

                Log.Error("Unhandled exception", (Exception)e.ExceptionObject);

            if (!e.IsTerminating)

                //Do not display a message unless the application is terminating

                return;

            var description = e.IsTerminating

                              ? WPF.Properties.Resources.Unexpected_Error_Terminating

                              : WPF.Properties.Resources.Unexpected_Error;

            var message = String.Format(@"{0}<LineBreak/>{1}<LineBreak/><LineBreak/>{2}",

                description,

                WPF.Properties.Resources.We_Apologize,

                WPF.Properties.Resources.Please_Submit_Error);

            var exc = ((Exception) e.ExceptionObject);

            var messages = new[]{

                                   new UserMessage

                                       {

                                           Message = exc.Message,

                                           Details = exc.ToString(),

                                           Severity = Severity.Error

                                       }

                               };

            ShowMessages("Oops!", message,messages);

        }

        void OnDispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)

        {

            //Do not display any messages if this is a 304 code

            if (IsAllowedException(e.Exception))

            {

                return;

            }

            if (e.Exception is ReflectionTypeLoadException)

            {

                var les = (ReflectionTypeLoadException)e.Exception;

                Log.Error("Unhandled exception", les);

                foreach (var le in les.LoaderExceptions)

                {

                    Log.Error("Dll load error", le);

                }

            }

            else

                Log.Error("Unhandled Dispatcher exception", e.Exception);

           /* var messages = new[]{

                                   new UserMessage

                                       {

                                           Message = e.Exception.Message, 

                                           Details = e.Exception.ToString(),

                                           Severity = Severity.Error

                                       }

                               };

            ShowMessages(WPF.Properties.Resources.Error_Title, 

                WPF.Properties.Resources.Unexpected_Error,

                messages);*/

            e.Handled=true;

        }

        void ShowMessages(string title,string message,IEnumerable<UserMessage> messages )

        {

            var messageList = messages.ToList();

            LogMessages(messageList);

            Execute.OnUIThread(()=>{

                                       var messageView = new MessageView(messageList)

                                                        {

                                                            Title = title, 

                                                            Message = message

                                                        };

                                       messageView.ShowDialog();

            });

        }

        private void LogMessages(IEnumerable<UserMessage> messages)

        {

            var logMessage = CreateMessage(messages);

            Log.Error(logMessage);

        }

        private static string CreateMessage(IEnumerable<UserMessage> messages)

        {

            var messageBuilder = messages.Aggregate(new StringBuilder("Unexpected Error\r\n"),

                                                    (builder, message) =>

                                                        {

                                                            builder.AppendFormat("\r\n[{0}] {1}\r\n{2}\r\n", message.Severity,

                                                                                 message.Message, message.Details);

                                                            return builder;

                                                        });

            var logMessage = messageBuilder.ToString();

            return logMessage;

        }

    }

}

    enum RestartFlags

    {

        NONE = 0,

        RESTART_CYCLICAL = 1,

        RESTART_NOTIFY_SOLUTION = 2,

        RESTART_NOTIFY_FAULT = 4,

        RESTART_NO_CRASH = 8,

        RESTART_NO_HANG = 16,

        RESTART_NO_PATCH = 32,

        RESTART_NO_REBOOT = 64

    }