public async Task <UpdateMeta> CheckForUpdate()
{
var url = BuildUrl("spec.xml");
var response = await _httpClient.GetStringAsync(url);
var tempPath = Path.GetTempPath();
var updateFilePath = Path.Combine(tempPath, Guid.NewGuid() + ".xml");
// To be able to deserialize XML, we need a "temporary" file
// so save the response to disk, deserialize and then
// delete the file from the user's machine
File.WriteAllText(updateFilePath, response);
var deserialized = SpecificationParser.Deserialize(updateFilePath);
File.Delete(updateFilePath);
var currentVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString();
var currentParsedVersion = new Version(currentVersion);
var remoteParsedVersion = new Version(deserialized.ProductVersion);
var isUpdateAvailable = remoteParsedVersion > currentParsedVersion;
return(new UpdateMeta(isUpdateAvailable, deserialized.ProductVersion));
}
private static Specification GetSpecification(string specificationPath)
{
if (!File.Exists(specificationPath))
{
throw new InvalidOperationException("Cannot compose WXS with missing NETWeasel Spec file, ensure spec.xml exists");
}
return(SpecificationParser.Deserialize(specificationPath));
}