/// <summary>
/// Get the content for the client brand file
/// </summary>
/// <param name="pathname">Client brand file path</param>
/// <param name="output">Stream to hold the client brand file</param>
/// <returns>Whether to get the content for the client brand file</returns>
public bool GetFile(string pathname, Stream output)
{
if (this.session == null)
{
return(false);
}
try {
IDocument doc = this.session.GetObjectByPath(pathname) as IDocument;
if (doc == null)
{
return(false);
}
DotCMIS.Data.IContentStream contentStream = doc.GetContentStream();
if (contentStream == null)
{
return(false);
}
contentStream.Stream.CopyTo(output);
return(true);
} catch (Exception e) {
Logger.Debug(e.Message);
return(false);
}
}
/// <summary>
/// Downloads the file and returns the SHA-1 hash of the content of the saved file
/// </summary>
/// <param name="remoteDocument">Remote document.</param>
/// <param name="localFileStream">Local taget file stream.</param>
/// <param name="status">Transmission status.</param>
/// <param name="hashAlg">Hash algoritm, which should be used to calculate hash of the uploaded stream content</param>
/// <exception cref="IOException">On any disc or network io exception</exception>
/// <exception cref="DisposeException">If the remote object has been disposed before the dowload is finished</exception>
/// <exception cref="AbortException">If download is aborted</exception>
/// <exception cref="CmisException">On exceptions thrown by the CMIS Server/Client</exception>
public void DownloadFile(IDocument remoteDocument, Stream localFileStream, FileTransmissionEvent status, HashAlgorithm hashAlg)
{
long?fileLength = remoteDocument.ContentStreamLength;
DotCMIS.Data.IContentStream contentStream = remoteDocument.GetContentStream();
// Skip downloading empty content, just go on with an empty file
if (null == fileLength || fileLength == 0 || contentStream == null)
{
hashAlg.TransformFinalBlock(new byte[0], 0, 0);
return;
}
using (ProgressStream progressStream = new ProgressStream(localFileStream, status))
using (CryptoStream hashstream = new CryptoStream(progressStream, hashAlg, CryptoStreamMode.Write))
using (Stream remoteStream = contentStream.Stream) {
status.ReportProgress(new TransmissionProgressEventArgs {
Length = remoteDocument.ContentStreamLength,
ActualPosition = 0
});
byte[] buffer = new byte[8 * 1024];
int len;
while ((len = remoteStream.Read(buffer, 0, buffer.Length)) > 0)
{
lock (this.disposeLock)
{
if (this.disposed)
{
status.ReportProgress(new TransmissionProgressEventArgs {
Aborted = true
});
throw new ObjectDisposedException(status.Path);
}
hashstream.Write(buffer, 0, len);
hashstream.Flush();
}
}
}
}
/// <summary>
/// Downloads the file and returns the SHA-1 hash of the content of the saved file
/// </summary>
/// <param name="remoteDocument">Remote document.</param>
/// <param name="localFileStream">Local taget file stream.</param>
/// <param name="transmission">Transmission status.</param>
/// <param name="hashAlg">Hash algoritm, which should be used to calculate hash of the uploaded stream content</param>
/// <exception cref="IOException">On any disc or network io exception</exception>
/// <exception cref="DisposeException">If the remote object has been disposed before the dowload is finished</exception>
/// <exception cref="AbortException">If download is aborted</exception>
/// <exception cref="CmisException">On exceptions thrown by the CMIS Server/Client</exception>
public void DownloadFile(
IDocument remoteDocument,
Stream localFileStream,
Transmission transmission,
HashAlgorithm hashAlg,
UpdateChecksum update = null)
{
byte[] buffer = new byte[8 * 1024];
int len;
if (localFileStream.Length > 0)
{
localFileStream.Seek(0, SeekOrigin.Begin);
while ((len = localFileStream.Read(buffer, 0, buffer.Length)) > 0)
{
hashAlg.TransformBlock(buffer, 0, len, buffer, 0);
}
}
long offset = localFileStream.Position;
long?fileLength = remoteDocument.ContentStreamLength;
if (fileLength <= offset)
{
transmission.Length = fileLength.GetValueOrDefault();
transmission.Position = offset;
hashAlg.TransformFinalBlock(new byte[0], 0, 0);
return;
}
DotCMIS.Data.IContentStream contentStream = null;
if (offset > 0)
{
long remainingBytes = (long)fileLength - offset;
transmission.Length = remoteDocument.ContentStreamLength;
transmission.Position = offset;
contentStream = remoteDocument.GetContentStream(remoteDocument.ContentStreamId, offset, remainingBytes);
}
else
{
contentStream = remoteDocument.GetContentStream();
}
using (var transmissionStream = transmission.CreateStream(localFileStream))
using (CryptoStream hashstream = new CryptoStream(transmissionStream, hashAlg, CryptoStreamMode.Write))
using (Stream remoteStream = contentStream != null ? contentStream.Stream : new MemoryStream(0)) {
transmission.Length = remoteDocument.ContentStreamLength;
transmission.Position = offset;
int written = 0;
while ((len = remoteStream.Read(buffer, 0, buffer.Length)) > 0)
{
lock (this.disposeLock) {
if (this.disposed)
{
transmission.Status = TransmissionStatus.ABORTED;
throw new ObjectDisposedException(transmission.Path);
}
try {
hashstream.Write(buffer, 0, len);
hashstream.Flush();
written += len;
} catch (Exception) {
this.UpdateHash(hashAlg, localFileStream.Length, update);
throw;
}
if (written >= 1024 * 1024)
{
this.UpdateHash(hashAlg, localFileStream.Length, update);
written = 0;
}
}
}
if (written > 0)
{
this.UpdateHash(hashAlg, localFileStream.Length, update);
}
}
}
/**
* Download a single file from the CMIS server.
*/
private void DownloadFile(IDocument remoteDocument, string localFolder)
{
activityListener.ActivityStarted();
if (remoteDocument.ContentStreamLength == 0)
{
Logger.Info("CmisDirectory | Skipping download of file with null content stream: " + remoteDocument.ContentStreamFileName);
activityListener.ActivityStopped();
return;
}
StreamWriter localfile = null;
DotCMIS.Data.IContentStream contentStream = null;
string filepath = Path.Combine(localFolder, remoteDocument.ContentStreamFileName);
// If a file exist, file is deleted.
if (File.Exists(filepath))
{
File.Delete(filepath);
}
string tmpfilepath = filepath + ".sync";
// Download file, starting at the last download point
Boolean success = false;
try
{
// Get the last position in the localfile. By default position 0 (Nuxeo do not support partial getContentStream #107
Int64 Offset = 0;
// Nuxeo don't support partial getContentStream
if (session.RepositoryInfo.VendorName.ToLower().Contains("nuxeo"))
{
Logger.Warn("CmisDirectory | Nuxeo does not support partial download, so restart from zero.");
localfile = new StreamWriter(tmpfilepath);
contentStream = remoteDocument.GetContentStream();
}
else
{
// Create Stream with the local file in append mode, if file is empty it's like a full download (Offset 0)
localfile = new StreamWriter(tmpfilepath, true);
localfile.AutoFlush = true;
Offset = localfile.BaseStream.Position;
contentStream = remoteDocument.GetContentStream(remoteDocument.Id, Offset, remoteDocument.ContentStreamLength);
}
if (contentStream == null)
{
Logger.Warn("CmisDirectory | Skipping download of file with null content stream: " + remoteDocument.ContentStreamFileName);
throw new IOException();
}
Logger.Info(String.Format("CmisDirectory | Start download of file with offset {0}", Offset));
contentStream.Stream.Flush();
CopyStream(contentStream.Stream, localfile.BaseStream);
localfile.Flush();
localfile.Close();
contentStream.Stream.Close();
success = true;
}
catch (Exception ex)
{
Logger.Fatal(String.Format("CmisDirectory | Download of file {0} abort: {1}", remoteDocument.ContentStreamFileName, ex));
success = false;
if (localfile != null)
{
localfile.Flush();
localfile.Close();
File.Delete(tmpfilepath);
}
if (contentStream != null)
{
contentStream.Stream.Close();
}
}
try
{
// Rename file
// TODO - Yannick - Control file integrity by using hash compare - Is it necessary ?
if (success)
{
File.Move(tmpfilepath, filepath);
// Get metadata.
Dictionary <string, string[]> metadata = FetchMetadata(remoteDocument);
// Create database entry for this file.
database.AddFile(filepath, remoteDocument.LastModificationDate, metadata);
}
}
catch (Exception ex)
{
Logger.Fatal("CmisDirectory | Unable to write metadata in the CmisDatabase: " + ex.ToString());
}
activityListener.ActivityStopped();
}
