/// <summary>
/// Download a file, without retrying.
/// </summary>
private void DownloadStream(DotCMIS.Data.IContentStream contentStream, string filePath)
{
using (Stream file = File.OpenWrite(filePath))
{
byte[] buffer = new byte[8 * 1024];
int len;
while ((len = contentStream.Stream.Read(buffer, 0, buffer.Length)) > 0)
{
file.Write(buffer, 0, len);
}
}
contentStream.Stream.Close();
}
/// <summary>
/// Download a file, without retrying.
/// </summary>
private byte[] DownloadStream(DotCMIS.Data.IContentStream contentStream, string filePath)
{
byte[] hash = { };
using (Stream file = File.OpenWrite(filePath))
using (SHA1 hashAlg = new SHA1Managed())
using (CryptoStream hashstream = new CryptoStream(file, hashAlg, CryptoStreamMode.Write))
{
byte[] buffer = new byte[8 * 1024];
int len;
while ((len = contentStream.Stream.Read(buffer, 0, buffer.Length)) > 0)
{
hashstream.Write(buffer, 0, len);
}
hashstream.FlushFinalBlock();
hash = hashAlg.Hash;
}
contentStream.Stream.Close();
return(hash);
}
/// <summary>
/// Download a single file from the CMIS server.
/// </summary>
private bool DownloadFile(IDocument remoteDocument, string localFolder)
{
sleepWhileSuspended();
string fileName = remoteDocument.ContentStreamFileName;
Logger.Info("Downloading: " + fileName);
// Skip if invalid file name. See https://github.com/nicolas-raoul/CmisSync/issues/196
if (Utils.IsInvalidFileName(fileName))
{
Logger.Info("Skipping download of file with illegal filename: " + fileName);
return(true);
}
try
{
DotCMIS.Data.IContentStream contentStream = null;
string filepath = Path.Combine(localFolder, fileName);
string tmpfilepath = filepath + ".sync";
// If there was previously a directory with this name, delete it.
// TODO warn if local changes inside the folder.
if (Directory.Exists(filepath))
{
Directory.Delete(filepath);
}
// If file exists, delete it.
File.Delete(filepath);
File.Delete(tmpfilepath);
// Download file.
Boolean success = false;
byte[] filehash = { };
try
{
contentStream = remoteDocument.GetContentStream();
// If this file does not have a content stream, ignore it.
// Even 0 bytes files have a contentStream.
// null contentStream sometimes happen on IBM P8 CMIS server, not sure why.
if (contentStream == null)
{
Logger.Warn("Skipping download of file with null content stream: " + fileName);
return(true);
}
// Skip downloading the content, just go on with an empty file
if (remoteDocument.ContentStreamLength == 0)
{
Logger.Info("Skipping download of file with content length zero: " + fileName);
using (FileStream s = File.Create(tmpfilepath))
{
s.Close();
}
}
else
{
filehash = DownloadStream(contentStream, tmpfilepath);
contentStream.Stream.Close();
}
success = true;
}
catch (CmisBaseException e)
{
ProcessRecoverableException("Download failed: " + fileName, e);
if (contentStream != null)
{
contentStream.Stream.Close();
}
success = false;
File.Delete(tmpfilepath);
}
if (success)
{
Logger.Info("Downloaded: " + fileName);
// TODO Control file integrity by using hash compare?
// Get metadata.
Dictionary <string, string[]> metadata = null;
try
{
metadata = FetchMetadata(remoteDocument);
}
catch (CmisBaseException e)
{
ProcessRecoverableException("Could not fetch metadata: " + fileName, e);
// Remove temporary local document to avoid it being considered a new document.
File.Delete(tmpfilepath);
return(false);
}
// Remove the ".sync" suffix.
File.Move(tmpfilepath, filepath);
if (null != remoteDocument.CreationDate)
{
File.SetCreationTime(filepath, (DateTime)remoteDocument.CreationDate);
}
if (null != remoteDocument.LastModificationDate)
{
File.SetLastWriteTime(filepath, (DateTime)remoteDocument.LastModificationDate);
}
// Create database entry for this file.
database.AddFile(filepath, remoteDocument.LastModificationDate, metadata, filehash);
Logger.Info("Added file to database: " + filepath);
}
return(success);
}
catch (Exception e)
{
ProcessRecoverableException("Could not download file: " + Path.Combine(localFolder, fileName), e);
return(false);
}
}
/// <summary>
/// Download a single file from the CMIS server.
/// </summary>
private void DownloadFile(IDocument remoteDocument, string localFolder)
{
activityListener.ActivityStarted();
string fileName = remoteDocument.ContentStreamFileName;
Logger.Info("Downloading: " + fileName);
// TODO: Make this configurable.
if (remoteDocument.ContentStreamLength == 0)
{
Logger.Info("Skipping download of file with content length zero: " + fileName);
activityListener.ActivityStopped();
return;
}
// Skip if invalid file name. See https://github.com/nicolas-raoul/CmisSync/issues/196
if (Utils.IsInvalidFileName(fileName))
{
Logger.Info("Skipping download of file with illegal filename: " + fileName);
activityListener.ActivityStopped();
return;
}
try
{
DotCMIS.Data.IContentStream contentStream = null;
string filepath = Path.Combine(localFolder, fileName);
string tmpfilepath = filepath + ".sync";
// If there was previously a directory with this name, delete it.
// TODO warn if local changes inside the folder.
if (Directory.Exists(filepath))
{
Directory.Delete(filepath);
}
// If file exists, delete it.
File.Delete(filepath);
File.Delete(tmpfilepath);
// Download file.
Boolean success = false;
try
{
contentStream = remoteDocument.GetContentStream();
// If this file does not have a content stream, ignore it.
// Even 0 bytes files have a contentStream.
// null contentStream sometimes happen on IBM P8 CMIS server, not sure why.
if (contentStream == null)
{
Logger.Warn("Skipping download of file with null content stream: " + fileName);
activityListener.ActivityStopped();
return;
}
DownloadStream(contentStream, tmpfilepath);
contentStream.Stream.Close();
success = true;
}
catch (Exception ex)
{
Logger.Error("Download failed: " + fileName + " " + ex);
if (contentStream != null)
{
contentStream.Stream.Close();
}
success = false;
File.Delete(tmpfilepath);
}
if (success)
{
Logger.Info("Downloaded: " + fileName);
// TODO Control file integrity by using hash compare?
// Get metadata.
Dictionary <string, string[]> metadata = null;
try
{
metadata = FetchMetadata(remoteDocument);
}
catch (Exception e)
{
Logger.Info("Exception while fetching metadata: " + fileName + " " + Utils.ToLogString(e));
// Remove temporary local document to avoid it being considered a new document.
File.Delete(tmpfilepath);
activityListener.ActivityStopped();
return;
}
// Remove the ".sync" suffix.
File.Move(tmpfilepath, filepath);
// Create database entry for this file.
database.AddFile(filepath, remoteDocument.LastModificationDate, metadata);
Logger.Info("Added to database: " + fileName);
}
}
catch (IOException e)
{
Logger.Warn("Exception while file operation: " + Utils.ToLogString(e));
}
activityListener.ActivityStopped();
}
