/// <summary>
/// Download castUrl resource and parse it
/// </summary>
public bool DownloadAndParse()
{
try
{
_logWriter.PrintMessage("Downloading app cast data...");
var appcast = _dataDownloader.DownloadAndGetAppCastData(_castUrl);
var signatureNeeded = Utilities.IsSignatureNeeded(_signatureVerifier.SecurityMode, _signatureVerifier.HasValidKeyInformation(), false);
bool isValidAppcast = true;
if (signatureNeeded)
{
_logWriter.PrintMessage("Downloading app cast signature data...");
var signature = "";
var extension = SignatureFileExtension?.TrimStart('.') ?? "signature";
try
{
signature = _dataDownloader.DownloadAndGetAppCastData(_castUrl + "." + extension);
}
catch (Exception e)
{
_logWriter.PrintMessage("Error reading app cast {0}.{2}: {1} ", _castUrl, e.Message, extension);
}
if (string.IsNullOrWhiteSpace(signature))
{
// legacy: check for .dsa file
try
{
signature = _dataDownloader.DownloadAndGetAppCastData(_castUrl + ".dsa");
}
catch (Exception e)
{
_logWriter.PrintMessage("Error reading app cast {0}.dsa: {1} ", _castUrl, e.Message);
}
}
isValidAppcast = VerifyAppCast(appcast, signature);
}
if (isValidAppcast)
{
_logWriter.PrintMessage("Appcast is valid! Parsing...");
ParseAppCast(appcast);
return(true);
}
}
catch (Exception e)
{
_logWriter.PrintMessage("Error reading app cast {0}: {1} ", _castUrl, e.Message);
}
_logWriter.PrintMessage("Appcast is not valid");
return(false);
}
/// <summary>
/// Gets the available updates.
/// </summary>
/// <returns>List<AppCastItem>.</returns>
public List <AppCastItem> GetAvailableUpdates()
{
Version installed = new Version(config.InstalledVersion);
var signatureNeeded = Utilities.IsSignatureNeeded(signatureVerifier.SecurityMode, signatureVerifier.HasValidKeyInformation(), false);
var allowAlphaVersions = updaterService.Get().CheckForPrerelease;
var results = appCast.Items.Where((item) =>
{
// Filter out prerelease tags if specified as such
if (!allowAlphaVersions && prereleaseVersionTags.Any(p => item.Title.Contains(p, StringComparison.OrdinalIgnoreCase)))
{
return(false);
}
// Filter out by os
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
// Filter out if using portable or installer version
var fileName = item.DownloadLink.Split("/", StringSplitOptions.RemoveEmptyEntries).LastOrDefault();
if (!item.IsWindowsUpdate)
{
return(false);
}
else if (IsInstallerVersion && !fileName.Contains("setup", StringComparison.OrdinalIgnoreCase))
{
return(false);
}
else if (!IsInstallerVersion && fileName.Contains("setup", StringComparison.OrdinalIgnoreCase))
{
return(false);
}
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX) && !item.IsMacOSUpdate)
{
return(false);
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux) && !item.IsLinuxUpdate)
{
return(false);
}
// Base validation stuff
if (new Version(item.Version).CompareTo(installed) <= 0)
{
return(false);
}
if (signatureNeeded && string.IsNullOrEmpty(item.DownloadSignature) && !string.IsNullOrEmpty(item.DownloadLink))
{
return(false);
}
return(true);
}).ToList();
return(results);
}
