/// <summary>
/// Checks for application updates broadcasted by the appcast URI provided when this object
/// was constructed.
/// </summary>
/// <param name="myUpdateChannel">
/// An optional update channel. Will only look for updates where the channel of the update
/// matches this value in a case-insensitive fashion.
/// </param>
/// <returns>
/// Returns an ApplicationUpdate if an update that supersedes the executing assembly version
/// could be found. Returns null otherwise.
/// </returns>
public async Task <ApplicationUpdate> CheckForUpdate(string myUpdateChannel = null)
{
ApplicationUpdate update = await GetLatestUpdate(myUpdateChannel);
var thisVersion = Assembly.GetEntryAssembly().GetName().Version;
if (update.IsNewerThan(thisVersion))
{
return(update);
}
else
{
return(null);
}
}
/// <summary>
/// Checks for application updates broadcasted by the appcast URI provided when this object
/// was constructed.
/// </summary>
/// <param name="myUpdateChannel">
/// An optional update channel. Will only look for updates where the channel of the update
/// matches this value in a case-insensitive fashion.
/// </param>
/// <returns>
/// Returns an ApplicationUpdate if an update that supersedes the executing assembly version
/// could be found. Returns null otherwise.
/// </returns>
public async Task <ApplicationUpdate> CheckForUpdate(string myUpdateChannel = null)
{
var thisVersion = Assembly.GetEntryAssembly().GetName().Version;
var bestVersion = thisVersion;
ApplicationUpdate bestAvailableUpdate = null;
try
{
using (var cli = new HttpClient())
{
string appInfo = null;
#if USE_LOCAL_UPDATE_XML
string appInfoPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData), @"CloudVeil", @"update.xml");
if (!File.Exists(appInfoPath))
{
appInfo = await cli.GetStringAsync(m_appcastLocationUri);
}
else
{
using (var stream = new FileStream(appInfoPath, FileMode.Open))
{
using (var reader = new StreamReader(stream))
{
appInfo = await reader.ReadToEndAsync();
}
}
}
#else
appInfo = await cli.GetStringAsync(m_appcastLocationUri);
#endif
var feed = SyndicationFeed.Load(XmlReader.Create(new StringReader(appInfo)));
foreach (var item in feed.Items)
{
var enclosure = item.Links.Where(x => x.RelationshipType == "enclosure").FirstOrDefault();
if (enclosure != null)
{
var sparkleVersion = enclosure.AttributeExtensions.Where(x => x.Key.Name == "version").FirstOrDefault().Value;
var sparkleOs = enclosure.AttributeExtensions.Where(x => x.Key.Name == "os").FirstOrDefault().Value;
var updateChannel = enclosure.AttributeExtensions.Where(x => x.Key.Name == "channel").FirstOrDefault().Value;
var sparkleInstallerArgs = enclosure.AttributeExtensions.Where(x => x.Key.Name == "installerArguments").FirstOrDefault().Value;
if (StringExtensions.Valid(updateChannel) && StringExtensions.Valid(myUpdateChannel) && !updateChannel.OIEquals(myUpdateChannel))
{
m_logger.Info("Skipping app update in channel {0} because it doesn't match required channel {1}.", updateChannel, myUpdateChannel);
continue;
}
Uri url = enclosure.Uri;
long length = enclosure.Length;
string mediaType = enclosure.MediaType;
var thisUpdateVersion = Version.Parse(sparkleVersion);
m_logger.Info("App version {0} detected in update channel. Checking if superior.", sparkleVersion);
if (thisUpdateVersion > bestVersion)
{
m_logger.Info("Available app update with version {0} is superior to current best version {1}.", bestVersion.ToString());
bestAvailableUpdate = new ApplicationUpdate(item.PublishDate.DateTime, item.Title.Text, ((TextSyndicationContent)item.Content).Text, thisVersion, thisUpdateVersion, url, UpdateKind.MsiInstaller, sparkleInstallerArgs, sparkleInstallerArgs.IndexOf("norestart") < 0);
bestVersion = thisUpdateVersion;
}
}
}
}
}
catch (WebException we)
{
// Failed to load. Doesn't matter, we could not find an update. Maybe later
// return an error or something.
LoggerUtil.RecursivelyLogException(m_logger, we);
}
catch (Exception e)
{
// Other unknown failure. Doesn't matter, we could not find an update. Maybe later
// return an error or something.
LoggerUtil.RecursivelyLogException(m_logger, e);
}
return(bestAvailableUpdate);
}