/// <summary>
/// Download a stream from server to a client. Internally, it will also fake an empty request (CStreamSerializationHelper.idReadDataFromServerToClient) on behalf on the client
/// </summary>
/// <param name="PeerHandle">A peer socket handle to represent a client</param>
/// <param name="source">A valid stream at server side</param>
/// <param name="fileSize">File size in bytes. It will be -1 if there is error</param>
/// <param name="errMsg">An error message. It will be empty string with zero length if no error is found</param>
public static void Download(ulong PeerHandle, Stream source, out ulong fileSize, out string errMsg)
{
if (source == null)
{
fileSize = ulong.MaxValue;
errMsg = "Source stream not available";
return;
}
else if (!source.CanRead)
{
fileSize = ulong.MaxValue;
errMsg = "Source stream not readable";
return;
}
errMsg = "";
try
{
fileSize = (ulong)source.Length;
}
catch (Exception)
{
fileSize = ulong.MaxValue;
}
unsafe
{
byte[] temp = null;
fixed(byte *p = temp)
{
ServerCoreLoader.MakeRequest(PeerHandle, CStreamSerializationHelper.idReadDataFromServerToClient, p, (uint)0);
}
}
}
/// <summary>
/// Download a file from server to a client. Internally, it will also fake an empty request (CStreamSerializationHelper.idReadDataFromServerToClient) on behalf on the client
/// </summary>
/// <param name="PeerHandle">A peer socket handle to represent a client</param>
/// <param name="RemoteFilePath">A path to a file</param>
/// <param name="fileSize">File size in bytes. It will be -1 if there is error</param>
/// <param name="errMsg">An error message. It will be empty string with zero length if no error is found</param>
/// <returns>A file stream</returns>
public static FileStream DownloadFile(ulong PeerHandle, string RemoteFilePath, out ulong fileSize, out string errMsg)
{
FileStream fs = null;
try
{
fs = new FileStream(RemoteFilePath, FileMode.Open);
fileSize = (ulong)fs.Length;
unsafe
{
byte [] temp = null;
fixed(byte *p = temp)
{
ServerCoreLoader.MakeRequest(PeerHandle, CStreamSerializationHelper.idReadDataFromServerToClient, p, (uint)0);
}
}
errMsg = "";
}
catch (Exception err)
{
fileSize = ulong.MaxValue;
errMsg = err.Message;
}
return(fs);
}
