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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="UpdateService.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// The Update Service
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Services
{
using System;
using System.IO;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading;
using HandBrake.ApplicationServices.Utilities;
using HandBrake.ApplicationServices.Interop;
using HandBrakeWPF.Model;
using HandBrakeWPF.Services.Interfaces;
using AppcastReader = HandBrakeWPF.Utilities.AppcastReader;
/// <summary>
/// The Update Service
/// </summary>
public class UpdateService : IUpdateService
{
#region Constants and Fields
/// <summary>
/// Backing field for the update service
/// </summary>
private readonly IUserSettingService userSettingService;
#endregion
#region Constructors and Destructors
/// <summary>
/// Initializes a new instance of the <see cref="UpdateService"/> class.
/// </summary>
/// <param name="userSettingService">
/// The user setting service.
/// </param>
public UpdateService(IUserSettingService userSettingService)
{
this.userSettingService = userSettingService;
}
#endregion
#region Public Methods
/// <summary>
/// Perform an update check at application start, but only daily, weekly or monthly depending on the users settings.
/// </summary>
/// <param name="callback">
/// The callback.
/// </param>
public void PerformStartupUpdateCheck(Action<UpdateCheckInformation> callback)
{
// Make sure it's running on the calling thread
if (this.userSettingService.GetUserSetting<bool>(UserSettingConstants.UpdateStatus))
{
DateTime lastUpdateCheck = this.userSettingService.GetUserSetting<DateTime>(UserSettingConstants.LastUpdateCheckDate);
int checkFrequency = this.userSettingService.GetUserSetting<int>(UserSettingConstants.DaysBetweenUpdateCheck) == 0 ? 7 : 30;
if (DateTime.Now.Subtract(lastUpdateCheck).TotalDays > checkFrequency)
{
this.userSettingService.SetUserSetting(UserSettingConstants.LastUpdateCheckDate, DateTime.Now);
this.CheckForUpdates(callback);
}
}
}
/// <summary>
/// Check for Updates
/// </summary>
/// <param name="callback">
/// The callback.
/// </param>
public void CheckForUpdates(Action<UpdateCheckInformation> callback)
{
ThreadPool.QueueUserWorkItem(
delegate
{
try
{
string url =
VersionHelper.Is64Bit() || Environment.Is64BitOperatingSystem
? Constants.Appcast64
: Constants.Appcast32;
if (VersionHelper.IsNightly())
{
url =
VersionHelper.Is64Bit() || Environment.Is64BitOperatingSystem
? Constants.AppcastUnstable64
: Constants.AppcastUnstable32;
}
var currentBuild = HandBrakeUtils.Build;
// Initialize variables
WebRequest request = WebRequest.Create(url);
WebResponse response = request.GetResponse();
var reader = new AppcastReader();
// Get the data, convert it to a string, and parse it into the AppcastReader
reader.GetUpdateInfo(new StreamReader(response.GetResponseStream()).ReadToEnd());
// Further parse the information
string build = reader.Build;
int latest = int.Parse(build);
int current = currentBuild;
var info2 = new UpdateCheckInformation
{
NewVersionAvailable = latest > current,
DescriptionUrl = reader.DescriptionUrl,
DownloadFile = reader.DownloadFile,
Build = reader.Build,
Version = reader.Version,
ExpectedSHA1Hash = reader.Hash
};
callback(info2);
}
catch (Exception exc)
{
callback(new UpdateCheckInformation { NewVersionAvailable = false, Error = exc });
}
});
}
/// <summary>
/// Download the update file.
/// </summary>
/// <param name="url">
/// The url.
/// </param>
/// <param name="expectedSha1Hash">
/// The expected Sha 1 Hash.
/// </param>
/// <param name="completed">
/// The complete.
/// </param>
/// <param name="progress">
/// The progress.
/// </param>
public void DownloadFile(string url, string expectedSha1Hash, Action<DownloadStatus> completed, Action<DownloadStatus> progress)
{
ThreadPool.QueueUserWorkItem(
delegate
{
string tempPath = Path.Combine(Path.GetTempPath(), "handbrake-setup.exe");
WebClient wcDownload = new WebClient();
try
{
if (File.Exists(tempPath))
File.Delete(tempPath);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Credentials = CredentialCache.DefaultCredentials;
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
long fileSize = webResponse.ContentLength;
Stream responceStream = wcDownload.OpenRead(url);
Stream localStream = new FileStream(tempPath, FileMode.Create, FileAccess.Write, FileShare.None);
int bytesSize;
byte[] downBuffer = new byte[2048];
while ((bytesSize = responceStream.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
localStream.Write(downBuffer, 0, bytesSize);
progress(new DownloadStatus { BytesRead = localStream.Length, TotalBytes = fileSize});
}
responceStream.Close();
localStream.Close();
completed(
GetSHA1(tempPath) != expectedSha1Hash
? new DownloadStatus
{
WasSuccessful = false,
Message = "Download Failed. SHA1 Checksum Failed. Please visit the website to download this update."
}
: new DownloadStatus { WasSuccessful = true, Message = "Download Complete." });
}
catch (Exception exc)
{
progress(new DownloadStatus { WasSuccessful = false, Exception = exc, Message = "Download Failed. Please visit the website to download this update." });
}
});
}
/// <summary>
/// The get sh a 1.
/// </summary>
/// <param name="fileName">
/// The file name.
/// </param>
/// <returns>
/// The <see cref="string"/>.
/// </returns>
public static String GetSHA1(String fileName)
{
FileStream file = new FileStream(fileName, FileMode.Open);
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] retVal = sha1.ComputeHash(file);
file.Close();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
{
sb.Append(retVal[i].ToString("x2"));
}
return sb.ToString();
}
#endregion
}
}
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