// This method is invoked via the AsyncOperation object,
// so it is guaranteed to be executed on the correct thread.
private void OnAsyncReportProgress(object state)
{
AsyncOperationProgressEventArgs e = state as AsyncOperationProgressEventArgs;
if (AsyncOperationProgress != null)
{
AsyncOperationProgress(this, e);
}
}
private MemoryStream CopyResponseToMemory(AsyncData data, Stream responseStream, long contentLength)
{
if (responseStream == null)
{
return(null);
}
// read the stream into memory. That's the only way to satisfy the "main work
// on the other thread requirement
MemoryStream memStream = new MemoryStream();
const int size = 4096;
var bytes = new byte[size];
int numBytes;
double current = 0;
long bytesWritten = 0;
while ((numBytes = responseStream.Read(bytes, 0, size)) > 0)
{
memStream.Write(bytes, 0, numBytes);
if (data == null || data.Delegate == null)
{
continue;
}
bytesWritten += numBytes;
if (contentLength > size)
{
current = bytesWritten * 100d / contentLength;
}
// see if we are still in the list...
// Multiple threads will access the task dictionary,
// so it must be locked to serialize access.
if (CheckIfOperationIsCancelled(data.UserData))
{
throw new ArgumentException("Operation was cancelled");
}
var args = new AsyncOperationProgressEventArgs(
contentLength,
bytesWritten,
(int)current,
data.UriToUse,
data.HttpVerb,
data.UserData);
data.Operation.Post(data.Delegate, args);
}
memStream.Seek(0, SeekOrigin.Begin);
return(memStream);
}
internal bool SendProgressData(AsyncData data, AsyncOperationProgressEventArgs args)
{
// In this case, don't allow cancellation, as the method
// is about to raise the completed event.
bool ret = !CheckIfOperationIsCancelled(data.UserData);
if (ret)
{
data.Operation.Post(data.Delegate, args);
}
return(ret);
}
/// <summary>takes our copy of the stream, and puts it into the request stream</summary>
protected void CopyRequestData()
{
if (_requestCopy != null)
{
// Since we don't use write buffering on the WebRequest object,
// we need to ensure the Content-Length field is correctly set
// to the length we want to set.
EnsureWebRequest();
Request.ContentLength = _requestCopy.Length;
// stream it into the real request stream
Stream req = base.GetRequestStream();
try
{
const int size = 4096;
byte[] bytes = new byte[size];
int numBytes;
double oneLoop = 100;
if (_requestCopy.Length > size)
{
oneLoop = (100 / ((double)_requestCopy.Length / size));
}
// 3 lines of debug code
// this.requestCopy.Seek(0, SeekOrigin.Begin);
// StreamReader reader = new StreamReader( this.requestCopy );
// string text = reader.ReadToEnd();
_requestCopy.Seek(0, SeekOrigin.Begin);
long bytesWritten = 0;
double current = 0;
while ((numBytes = _requestCopy.Read(bytes, 0, size)) > 0)
{
req.Write(bytes, 0, numBytes);
bytesWritten += numBytes;
if (_asyncData != null && _asyncData.Delegate != null &&
_asyncData.DataHandler != null)
{
AsyncOperationProgressEventArgs args;
args = new AsyncOperationProgressEventArgs(
_requestCopy.Length,
bytesWritten, (int)current,
Request.RequestUri,
Request.Method,
_asyncData.UserData);
current += oneLoop;
if (!_asyncData.DataHandler.SendProgressData(_asyncData, args))
{
break;
}
}
}
}
finally
{
req.Close();
}
}
else
{
if (IsBatch)
{
EnsureWebRequest();
ContentStore.SaveToXml(GetRequestStream());
CopyRequestData();
}
}
}
