private static void PerformCheck(Object stateInfo)
{
try
{
ShrewProperties properties = ShrewConfiguration.LoadProperties();
Version localVersion = Assembly.GetExecutingAssembly().GetName().Version;
//userID used to track active user count.
WebRequest request = HttpWebRequest.Create(string.Format(VERSION_URL, properties.userId, localVersion.ToString(), getArch()));
WebResponse response = request.GetResponse();
StreamReader rdr = new StreamReader(response.GetResponseStream());
char[] buffer = new char[response.ContentLength];
rdr.Read(buffer, 0, (Int32)response.ContentLength);
Version latestVersion = new Version(new String(buffer));
bool newVersionAvailable = latestVersion.CompareTo(localVersion) > 0;
if (newVersionAvailable && UpdateAvailable != null)
{
UpdateAvailable(null, new UpdateAvailableArgs(latestVersion));
}
properties.lastUpdateCheck = DateTime.UtcNow;
ShrewConfiguration.SaveProperties(properties);
}
catch (Exception)
{
//Eat all errors
}
}
internal static void SaveProperties(ShrewProperties properties)
{
DeleteProperties();
string serializedProperties = JsonConvert.SerializeObject(properties);
byte[] encryptedData = ProtectedData.Protect(
Encoding.UTF8.GetBytes(serializedProperties), null, DataProtectionScope.CurrentUser);
File.WriteAllBytes(propsFileName, encryptedData);
}
public static void CheckForUpdate()
{
ShrewProperties properties = ShrewConfiguration.LoadProperties();
if (properties == null)
{
properties = new ShrewProperties();
properties.userId = Guid.NewGuid();
ShrewConfiguration.SaveProperties(properties);
}
long initalDelay = 0;
if (properties.lastUpdateCheck != null)
{
initalDelay = (long)properties.lastUpdateCheck.AddMilliseconds(UPDATE_CHECK_INTERVAL_MILLIS)
.Subtract(DateTime.UtcNow).TotalMilliseconds;
if (initalDelay < 0)
{
initalDelay = 0;
}
}
updateCheckTimer = new Timer(UpdateChecker.PerformCheck, null, initalDelay, UPDATE_CHECK_INTERVAL_MILLIS);
}
internal static ShrewProperties LoadProperties()
{
if (File.Exists(propsFileName))
{
try
{
byte[] encryotedData = File.ReadAllBytes(propsFileName);
string serializedProperties = Encoding.UTF8.GetString(
ProtectedData.Unprotect(
encryotedData, null, DataProtectionScope.CurrentUser));
ShrewProperties properties = JsonConvert.DeserializeObject <ShrewProperties>(serializedProperties);
return(properties);
}
catch (Exception)
{
DeleteProperties();
throw;
}
}
else
{
return(null);
}
}