private bool Transfer()
{
int index = 0;
DAsyncResultHandler rh = null;
DOnExceptionFromServer se = null;
CClientSocket cs = AttachedClientSocket;
if (!cs.Sendable)
{
return(false);
}
uint sent_buffer_size = cs.BytesInSendingBuffer;
if (sent_buffer_size > 3 * STREAM_CHUNK_SIZE)
{
return(true);
}
while (index < m_vContext.Count)
{
CContext context = m_vContext[index];
if (context.Sent)
{
++index;
continue;
}
if (context.Uploading && context.Tried && context.File == null)
{
if (index == 0)
{
if (context.Upload != null)
{
context.Upload(this, CANNOT_OPEN_LOCAL_FILE_FOR_READING, context.ErrMsg);
}
m_vContext.RemoveFromFront();
}
else
{
++index;
}
continue;
}
if (context.Uploading)
{
if (!context.Tried)
{
context.Tried = true;
try
{
FileShare fs = FileShare.None;
if ((context.Flags & FILE_OPEN_SHARE_READ) == FILE_OPEN_SHARE_READ)
{
fs = FileShare.Read;
}
context.File = new FileStream(context.LocalFile, FileMode.Open, FileAccess.Read, fs);
context.FileSize = context.File.Length;
IClientQueue cq = AttachedClientSocket.ClientQueue;
if (cq.Available)
{
if (!cq.StartJob())
{
context.File.Close();
context.File = null;
throw new Exception("Cannot start queue job");
}
}
if (!SendRequest(idUpload, context.FilePath, context.Flags, context.FileSize, rh, context.Discarded, se))
{
return(false);
}
}
catch (Exception err)
{
context.ErrMsg = err.Message;
}
finally { }
}
if (context.File == null)
{
if (index == 0)
{
if (context.Upload != null)
{
context.Upload(this, CANNOT_OPEN_LOCAL_FILE_FOR_READING, context.ErrMsg);
}
m_vContext.RemoveFromFront();
}
else
{
++index;
}
continue;
}
else
{
using (CScopeUQueue sb = new CScopeUQueue())
{
if (sb.UQueue.MaxBufferSize < STREAM_CHUNK_SIZE)
{
sb.UQueue.Realloc(STREAM_CHUNK_SIZE);
}
byte[] buffer = sb.UQueue.IntenalBuffer;
int ret = context.File.Read(buffer, 0, (int)STREAM_CHUNK_SIZE);
while (ret > 0)
{
if (!SendRequest(idUploading, buffer, (uint)ret, rh, context.Discarded, se))
{
return(false);
}
sent_buffer_size = cs.BytesInSendingBuffer;
if (ret < (int)STREAM_CHUNK_SIZE)
{
break;
}
if (sent_buffer_size >= 5 * STREAM_CHUNK_SIZE)
{
break;
}
ret = context.File.Read(buffer, 0, (int)STREAM_CHUNK_SIZE);
}
if (ret < (int)STREAM_CHUNK_SIZE)
{
context.Sent = true;
if (!SendRequest(idUploadCompleted, rh, context.Discarded, se))
{
return(false);
}
IClientQueue cq = AttachedClientSocket.ClientQueue;
if (cq.Available)
{
cq.EndJob();
}
}
if (sent_buffer_size >= 4 * STREAM_CHUNK_SIZE)
{
break;
}
}
}
}
else
{
if (!SendRequest(idDownload, context.FilePath, context.Flags, rh, context.Discarded, se))
{
return(false);
}
context.Sent = true;
context.Tried = true;
sent_buffer_size = cs.BytesInSendingBuffer;
if (sent_buffer_size > 3 * STREAM_CHUNK_SIZE)
{
break;
}
}
++index;
}
return(true);
}
