private void DoCheckForUpdate(bool skipIfPeriodNotElapsed, bool fireErrorEvent, bool fireNotFoundEvent)
{
OnUpdateCheckStarted();
UpdatesHistoryInfo updatesHistoryInfo = UpdatesHistoryInfo.LoadFromFile(Path.Combine(this.settings.ProductPathToStoreHistoryInfo, "SoftwareUpdateHistory.xml"), XmlSerializableFileCorruptedAction.LoadDefaultsSilently);
try
{
if (skipIfPeriodNotElapsed && (updatesHistoryInfo.LastUpdateCheck + settings.UpdateCheckPeriod > DateTime.Now))
{
return;
}
updatesHistoryInfo.LastUpdateCheck = DateTime.Now;
string tmpPath = Path.Combine(Path.Combine(Path.GetTempPath(), "Scarfsail.SoftwareUpdates"), Guid.NewGuid().ToString());
if (!Directory.Exists(tmpPath))
{
Directory.CreateDirectory(tmpPath);
}
//Download definition xml file
string definitionXmlFileName = Path.Combine(tmpPath, "Definition.xml");
if (File.Exists(definitionXmlFileName))
{
File.Delete(definitionXmlFileName);
}
using (WebClient webClient = new WebClient())
{
webClient.DownloadFile(settings.RemoteDefinitionXmlUrl + String.Format("?Version={0}&ForceCheck={1}", settings.ProductVersion, !skipIfPeriodNotElapsed), definitionXmlFileName);
}
UpdateDefinitionXml updateDefinitionXml = UpdateDefinitionXml.LoadFromFile(definitionXmlFileName, XmlSerializableFileCorruptedAction.LoadDefaultsSilently);
if (updateDefinitionXml.LatestVersion.Version > settings.ProductVersion)
{
updatesHistoryInfo.LastUpdateFound = DateTime.Now;
OnUpdateFound(new UpdateFoundEventArgs(updateDefinitionXml, settings.ProductVersion, tmpPath));
}
else
{
if (fireNotFoundEvent)
{
this.OnUpdateNotFound(skipIfPeriodNotElapsed);
}
}
}
catch (WebException ex)
{
UpdateErrorHandler(ex.InnerException != null ? ex.InnerException.Message : ex.Message, updatesHistoryInfo, fireErrorEvent, skipIfPeriodNotElapsed);
}
catch (Exception ex)
{
UpdateErrorHandler(ex.Message, updatesHistoryInfo, fireErrorEvent, skipIfPeriodNotElapsed);
}
finally
{
updatesHistoryInfo.Save();
OnUpdateCheckFinished();
}
}
internal UpdateFoundEventArgs(UpdateDefinitionXml updateDefinitionXml, Version currentVersion, string tmpPath)
{
this.updateDefinition = updateDefinitionXml;
this.CurrentVersion = currentVersion;
this.tmpPath = tmpPath;
}