/// <summary>
/// Syncs a file
/// </summary>
/// <param name="zsyncFile"></param>
/// <param name="outputFile"></param>
/// <param name="fileUri"></param>
/// <returns>Number of bytes downloaded</returns>
/// <exception cref="WebException"></exception>
/// <exception cref="Exception"></exception>
public static long Sync(Uri zsyncFile, FileInfo outputFile, Uri fileUri = null, Action <SyncState> stateUpdate = null)
{
// Load zsync control file
var cf = new ControlFile(zsyncFile.ToString().GetStreamAsync().Result);
return(Sync(cf, zsyncFile, outputFile, fileUri, stateUpdate));
}
/// <summary>
/// Syncs a file
/// </summary>
/// <param name="zsyncFile"></param>
/// <param name="output"></param>
/// <returns>Number of bytes downloaded</returns>
/// <exception cref="WebException"></exception>
/// <exception cref="Exception"></exception>
public static long Sync(Uri zsyncFile, DirectoryInfo output)
{
// Load zsync control file
var cf = new ControlFile(zsyncFile.ToString().GetStreamAsync().Result);
var outputFile = new FileInfo(Path.Combine(output.FullName, cf.GetHeader().Filename.TrimStart()));
return(Sync(cf, zsyncFile, outputFile));
}
private static long Sync(ControlFile cf, Uri zsyncFile, FileInfo outputFile, Uri fileUri = null, Action <SyncState> stateUpdate = null)
{
stateUpdate?.Invoke(SyncState.GetHeader);
if (fileUri == null)
{
if (cf.GetHeader().Url == null || !IsAbsoluteUrl(cf.GetHeader().Url))
{
// Relative
fileUri = new Uri(zsyncFile.ToString().Replace(".zsync", string.Empty));
}
else
{
fileUri = new Uri(cf.GetHeader().Url);
}
}
if (fileUri.ToString().HeadAsync().Result.StatusCode == HttpStatusCode.NotFound)
{
// File not found
throw new WebException("File not found");
}
if (outputFile.Exists)
{
// File exists, use the existing file as the seed file
stateUpdate?.Invoke(SyncState.PatchFile);
OutputFile of = new OutputFile(outputFile, cf, fileUri, stateUpdate);
of.Patch();
if (VerifyFile(of.TempPath, cf.GetHeader().Sha1))
{
File.Copy(of.TempPath.FullName, of.FilePath.FullName, true);
File.Delete(of.TempPath.FullName);
}
else
{
throw new Exception("File invalid");
}
return(of.TotalBytesDownloaded);
}
else
{
stateUpdate?.Invoke(SyncState.DownloadNew);
fileUri.ToString().DownloadFileAsync(outputFile.Directory.FullName, outputFile.Name).Wait();
return(cf.GetHeader().Length);
}
}
