private UpdateInformation GetUpdateInfo()
{
if (UpdateInfoWebRequest is null)
{
throw new InvalidDataException(string.Format(CultureInfo.CurrentCulture, Properties.Resources.NotSet, nameof(UpdateInfoWebRequest)));
}
UpdateInfoWebRequest.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);
var webResponse = UpdateInfoWebRequest.GetResponse();
UpdateInformation updateInfo = null;
using (var appCastStream = webResponse.GetResponseStream())
{
if (appCastStream != null)
{
using (var streamReader = new StreamReader(appCastStream))
{
var data = streamReader.ReadToEnd();
updateInfo = JsonSerializer.Deserialize <UpdateInformation>(data);
}
}
webResponse.Close();
}
return(updateInfo);
}
private async Task <string> DownloadZip(UpdateInformation updateInfo)
{
if (DownloadWebClient is null)
{
throw new InvalidDataException(string.Format(CultureInfo.CurrentCulture, Properties.Resources.NotSet, nameof(DownloadWebClient)));
}
DownloadWebClient.CachePolicy = new RequestCachePolicy(RequestCacheLevel.NoCacheNoStore);
var zipSetupFilePath = Path.GetTempFileName();
if (File.Exists(zipSetupFilePath))
{
File.Delete(zipSetupFilePath);
}
await DownloadWebClient.DownloadFileTaskAsync(updateInfo.DownloadURL, zipSetupFilePath).ConfigureAwait(false);
if (File.Exists(zipSetupFilePath) == false)
{
throw new FileNotFoundException($"[{zipSetupFilePath}] does not exist");
}
// use https://emn178.github.io/online-tools/sha512_file_hash.html
var checkSum = CalculateCheckSum(zipSetupFilePath);
if (updateInfo.Checksum.ToUpperInvariant() != checkSum)
{
throw new FileNotFoundException($"Zip file integrity check failed, [{updateInfo.Checksum}/{checkSum}]");
}
return(zipSetupFilePath);
}
