/// <summary>
/// Returns a value indicating if a connection can be made to the resource.
/// </summary>
public void CheckConnection()
{
if (State != WebOperationState.Idle)
{
return;
}
State = WebOperationState.InProgress;
Result = WebOperationResult.None;
_webRequest.Method = GetWebCheckConnectionMethod();
IWebResponse response = null;
try
{
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(0, 0, State, Result));
response = _webRequest.GetResponse();
Result = WebOperationResult.Completed;
}
finally
{
if (response != null)
{
response.Close();
}
State = WebOperationState.Idle;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(0, 0, State, Result));
}
}
/// <summary>
/// Downloads the resource to a stream.
/// </summary>
/// <param name="stream">The stream used to receive the data.</param>
public void Download(Stream stream)
{
if (State != WebOperationState.Idle)
{
return;
}
State = WebOperationState.InProgress;
Result = WebOperationResult.None;
_webRequest.Method = GetWebDownloadMethod();
long totalBytesRead = 0;
long totalLength;
IWebResponse response = _webRequest.GetResponse();
using (Stream responseStream = response.GetResponseStream())
{
totalLength = response.ContentLength;
if (AutoSizeBuffer)
{
Buffer = CalculateBufferSize(totalLength);
}
var buffer = new byte[Buffer];
int bytesRead = 0;
do
{
if (_cancel)
{
Result = WebOperationResult.Canceled;
break;
}
if (responseStream != null)
{
bytesRead = responseStream.Read(buffer, 0, buffer.Length);
}
stream.Write(buffer, 0, bytesRead);
totalBytesRead += bytesRead;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(totalBytesRead, totalLength, State, Result));
}while (bytesRead > 0);
}
if (Result != WebOperationResult.Canceled && (totalLength < 0 || totalBytesRead == totalLength))
{
Result = WebOperationResult.Completed;
}
// Close the Response Stream
response.Close();
State = WebOperationState.Idle;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(totalBytesRead, totalLength, State, Result));
}
/// <summary>
/// Uploads the specified stream to the resource.
/// </summary>
/// <param name="stream">The stream to send to the resource.</param>
public void Upload(Stream stream)
{
if (State != WebOperationState.Idle)
{
return;
}
State = WebOperationState.InProgress;
Result = WebOperationResult.None;
_webRequest.Method = GetWebUploadMethod();
long totalBytesRead = 0;
long totalLength = stream.Length - stream.Position;
if (AutoSizeBuffer)
{
Buffer = CalculateBufferSize(totalLength);
}
using (Stream requestStream = _webRequest.GetRequestStream())
{
var buffer = new byte[Buffer];
int bytesRead;
do
{
if (_cancel)
{
Result = WebOperationResult.Canceled;
break;
}
bytesRead = stream.Read(buffer, 0, buffer.Length);
requestStream.Write(buffer, 0, bytesRead);
totalBytesRead += bytesRead;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(totalBytesRead, totalLength, State, Result));
} while (bytesRead > 0);
}
if (Result != WebOperationResult.Canceled && totalBytesRead == totalLength)
{
Result = WebOperationResult.Completed;
}
IWebResponse response = _webRequest.GetResponse();
response.Close();
State = WebOperationState.Idle;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(totalBytesRead, totalLength, State, Result));
}
/// <summary>
/// Gets the length of the data being received.
/// </summary>
/// <returns>The length of the data being received in bytes.</returns>
public long GetDownloadLength()
{
if (State != WebOperationState.Idle)
{
return(0);
}
State = WebOperationState.InProgress;
Result = WebOperationResult.None;
_webRequest.Method = GetWebDownloadMethod();
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(0, 0, State, Result));
IWebResponse response = _webRequest.GetResponse();
long length = response.ContentLength;
response.Close();
State = WebOperationState.Idle;
Result = WebOperationResult.Completed;
OnWebOperationProgress(new WebOperationProgressChangedEventArgs(0, length, State, Result));
return(length);
}