/// <summary>
/// Determines the actual content length in a more reliable
/// way for FTP downloads.
/// </summary>
/// <returns>-1 if no size could be determined</returns>
private static long GetContentLength(WebResponse response)
{
HttpWebResponse http = response as HttpWebResponse;
if (http != null)
{
return(http.ContentLength);
}
FtpWebResponse ftp = response as FtpWebResponse;
if (ftp != null)
{
if (ftp.ContentLength > 0)
{
return(ftp.ContentLength);
}
else
{
// There is a problem with the .NET FTP implementation:
// "TYPE I" is never sent unless a file is requested, but is sometimes
// required by FTP servers to get the file size (otherwise error 550).
// Thus, we use a custom FTP library from code project for this task.
FTP ftpConnection = null;
try
{
ftpConnection = new FTP(response.ResponseUri.Host, "anonymous", "*****@*****.**");
return(ftpConnection.GetFileSize(response.ResponseUri.LocalPath));
}
catch (Exception)
{
// Limited trust in this code...
return(-1);
}
finally
{
if (ftpConnection != null)
{
ftpConnection.Disconnect();
}
}
}
}
ScpWebResponse scp = response as ScpWebResponse;
if (scp != null)
{
return(scp.ContentLength);
}
return(-1);
}
/// <summary>
/// Creates a new ScpWebResponse from the current request.
/// </summary>
/// <returns></returns>
public override WebResponse GetResponse()
{
this.responseToAbort = new ScpWebResponse(this.requestUri, this.timeout);
return(this.responseToAbort);
}
/// <summary>
/// Creates a new ScpWebResponse from the current request.
/// </summary>
/// <returns></returns>
public override WebResponse GetResponse()
{
this.responseToAbort = new ScpWebResponse(this.requestUri, this.timeout);
return this.responseToAbort;
}