/// <summary>
/// Checks the version
/// </summary>
/// <exception cref="System.NotImplementedException"></exception>
public async Task CheckVersions(Type targetSubscriber = null)
{
// If 3 mins passed, update info
if (targetSubscriber == typeof(UpdateMenuViewModel) && Properties.Settings.Default.LastVersionCheck.AddSeconds(30) <= DateTime.Now ||
Properties.Settings.Default.LastVersionCheck.AddMinutes(3) <= DateTime.Now)
{
// Initialize an HttpWebRequest for the current URL.
var webReq = (HttpWebRequest)WebRequest.Create(ConstantsBase.ApiUrl + "Version");
webReq.Timeout = 1000;
webReq.Headers.Add("Client-Version", _currentVersion.ToString());
// Send request
using (WebResponse response = await webReq.GetResponseAsync())
{
// Get response
var respStream = response.GetResponseStream();
// The downloaded resource ends up in the variable named content.
var content = new MemoryStream();
// Read response if stream is not null
if (respStream != null)
{
await respStream.CopyToAsync(content);
}
// Deserialize string
string str = Encoding.Default.GetString(content.ToArray());
VersionList.Clear();
VersionList = JsonConvert.DeserializeObject <List <VersionModel> >(str);
// Update AppUpdater hash
this._appUpdaterHash = response.Headers["App-Checksum"];
content.Dispose();
}
// Update last check time
Properties.Settings.Default.LastVersionCheck = DateTime.Now;
Properties.Settings.Default.Save();
}
if (VersionList == null || !VersionList.Any())
{
return;
}
// Get latest version
LatestVersion = VersionList.MaxBy(x => x.VersionNumber);
if (CheckVersionsCompleted != null)
{
bool update = LatestVersion.VersionNumber > _currentVersion;
IsUpdateAvailable = update;
CheckVersionsCompleted(this, new CheckVersionEventArgs(update, targetSubscriber));
}
}
/// <summary>
/// Downloads the version package.
/// </summary>
/// <exception cref="System.NotImplementedException"></exception>
public async Task DownloadLatestVersion()
{
if (!VersionList.Any())
{
await CheckVersions();
}
// Get latest version
LatestVersion = VersionList.MaxBy(x => x.VersionNumber);
if (LatestVersion == null)
{
throw new InvalidOperationException(
"A version wasn't found after successfully reaching the server, this should not happen!");
}
// Check if package already is downloaded
if (File.Exists(ConstantsBase.UpdatePath) &&
String.Equals(CrcHelper.GetCrc32HashToString(ConstantsBase.UpdatePath), LatestVersion.CrcHash,
StringComparison.CurrentCultureIgnoreCase))
{
// Used to raise DownloadCompleted
_webClient.CancelAsync();
return;
}
// Iterate URLs
foreach (var url in LatestVersion.DownloadUrls)
{
Directory.CreateDirectory("tmp");
// Delete file if existent
if (File.Exists(ConstantsBase.UpdatePath))
{
File.Delete(ConstantsBase.UpdatePath);
}
// Download file
await _webClient.DownloadFileTaskAsync(new Uri(url), ConstantsBase.UpdatePath);
if (CrcHelper.GetCrc32HashToString(ConstantsBase.UpdatePath) != LatestVersion.CrcHash)
{
continue;
}
}
if (!String.Equals(CrcHelper.GetCrc32HashToString(ConstantsBase.UpdatePath), LatestVersion.CrcHash, StringComparison.CurrentCultureIgnoreCase))
{
throw new IOException("Could not successfully download the update package! Data corruption occurred! ");
}
}
