/// <devdoc>
/// <para>Generates a byte array or downloads data to an open file stream</para>
/// </devdoc>
private byte[] DownloadBits(WebRequest request, Stream writeStream, CompletionDelegate completionDelegate, AsyncOperation asyncOp) {
WebResponse response = null;
DownloadBitsState state = new DownloadBitsState(request, writeStream, completionDelegate, asyncOp, m_Progress, this);
if (state.Async) {
request.BeginGetResponse(new AsyncCallback(DownloadBitsResponseCallback), state);
return null;
} else {
response = m_WebResponse = GetWebResponse(request);
}
bool completed;
int bytesRead = state.SetResponse(response);
do {
completed = state.RetrieveBytes(ref bytesRead);
} while (!completed);
state.Close();
return state.InnerBuffer;
}
private static void DownloadBitsReadCallbackState(DownloadBitsState state, IAsyncResult result)
{
Stream readStream = state.ReadStream;
Exception exception = null;
bool flag = false;
try
{
int bytesRetrieved = 0;
if ((readStream != null) && (readStream != Stream.Null))
{
bytesRetrieved = readStream.EndRead(result);
}
flag = state.RetrieveBytes(ref bytesRetrieved);
}
catch (Exception exception2)
{
flag = true;
if (((exception2 is ThreadAbortException) || (exception2 is StackOverflowException)) || (exception2 is OutOfMemoryException))
{
throw;
}
exception = exception2;
state.InnerBuffer = null;
if (!(exception2 is WebException) && !(exception2 is SecurityException))
{
exception = new WebException(SR.GetString("net_webclient"), exception2);
}
AbortRequest(state.Request);
if ((state != null) && (state.WriteStream != null))
{
state.WriteStream.Close();
}
}
finally
{
if (flag)
{
if (exception == null)
{
state.Close();
}
state.CompletionDelegate(state.InnerBuffer, exception, state.AsyncOp);
}
}
}
static private void DownloadBitsReadCallbackState(DownloadBitsState state, IAsyncResult result) {
Stream stream = state.ReadStream;
Exception exception = null;
bool completed = false;
try {
int bytesRead = 0;
if (stream != null && stream != Stream.Null)
bytesRead = stream.EndRead(result);
completed = state.RetrieveBytes(ref bytesRead);
} catch (Exception e) {
completed = true;
if (e is ThreadAbortException || e is StackOverflowException || e is OutOfMemoryException) {
throw;
}
exception = e;
state.InnerBuffer = null;
if (!(e is WebException || e is SecurityException)) {
exception = new WebException(SR.GetString(SR.net_webclient), e);
}
AbortRequest(state.Request);
if(state != null && state.WriteStream != null){
state.WriteStream.Close();
}
}
finally {
if (completed) {
if(exception == null){
state.Close();
}
state.CompletionDelegate(state.InnerBuffer, exception, state.AsyncOp);
}
}
}
private byte[] DownloadBits(WebRequest request, Stream writeStream, CompletionDelegate completionDelegate, AsyncOperation asyncOp)
{
WebResponse response = null;
DownloadBitsState state = new DownloadBitsState(request, writeStream, completionDelegate, asyncOp, this.m_Progress, this);
if (state.Async)
{
request.BeginGetResponse(new AsyncCallback(WebClient.DownloadBitsResponseCallback), state);
return null;
}
response = this.m_WebResponse = this.GetWebResponse(request);
int bytesRetrieved = state.SetResponse(response);
while (!state.RetrieveBytes(ref bytesRetrieved))
{
}
state.Close();
return state.InnerBuffer;
}