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using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using OpenMetaverse;
using OpenMetaverse.Packets;
using OpenSim.Framework;
using OpenSim.Framework.Client;
using OpenSim.Framework.Communications.Cache;
using OpenSim.Framework.Statistics;
using OpenSim.Region.Interfaces;
using OpenSim.Region.Environment.Scenes;
namespace OpenSim.Region.ClientStack.LindenUDP
{
public class LLFileTransfer : IClientFileTransfer
{
protected IClientAPI m_clientAPI;
/// Dictionary of handlers for uploading files from client
/// TODO: Need to add cleanup code to remove handlers that have completed their upload
protected Dictionary<ulong, XferHandler> m_handlers;
protected object m_handlerLock = new object();
public LLFileTransfer(IClientAPI clientAPI)
{
m_handlers = new Dictionary<ulong, XferHandler>();
m_clientAPI = clientAPI;
m_clientAPI.OnXferReceive += XferReceive;
m_clientAPI.OnAbortXfer += AbortXferHandler;
}
public void Close()
{
if (m_clientAPI != null)
{
m_clientAPI.OnXferReceive -= XferReceive;
m_clientAPI.OnAbortXfer -= AbortXferHandler;
m_clientAPI = null;
}
}
public bool RequestUpload(string clientFileName, UploadComplete uploadCompleteCallback, UploadAborted abortCallback)
{
if ((String.IsNullOrEmpty(clientFileName)) || (uploadCompleteCallback == null))
{
return false;
}
XferHandler uploader = new XferHandler(m_clientAPI, clientFileName);
return StartUpload(uploader, uploadCompleteCallback, abortCallback);
}
public bool RequestUpload(UUID fileID, UploadComplete uploadCompleteCallback, UploadAborted abortCallback)
{
if ((fileID == UUID.Zero) || (uploadCompleteCallback == null))
{
return false;
}
XferHandler uploader = new XferHandler(m_clientAPI, fileID);
return StartUpload(uploader, uploadCompleteCallback, abortCallback);
}
private bool StartUpload(XferHandler uploader, UploadComplete uploadCompleteCallback, UploadAborted abortCallback)
{
uploader.UploadDone += uploadCompleteCallback;
if (abortCallback != null)
{
uploader.UploadAborted += abortCallback;
}
lock (m_handlerLock)
{
if (!m_handlers.ContainsKey(uploader.XferID))
{
m_handlers.Add(uploader.XferID, uploader);
uploader.RequestStartXfer(m_clientAPI);
return true;
}
else
{
// something went wrong with the xferID allocation
uploader.UploadDone -= uploadCompleteCallback;
if (abortCallback != null)
{
uploader.UploadAborted -= abortCallback;
}
return false;
}
}
}
protected void AbortXferHandler(IClientAPI remoteClient, ulong xferID)
{
lock (m_handlerLock)
{
if (m_handlers.ContainsKey(xferID))
{
m_handlers[xferID].AbortUpload(remoteClient);
m_handlers.Remove(xferID);
}
}
}
protected void XferReceive(IClientAPI remoteClient, ulong xferID, uint packetID, byte[] data)
{
lock (m_handlerLock)
{
if (m_handlers.ContainsKey(xferID))
{
m_handlers[xferID].XferReceive(remoteClient, xferID, packetID, data);
}
}
}
}
public class XferHandler
{
private AssetBase m_asset;
public event UploadComplete UploadDone;
public event UploadAborted UploadAborted;
private sbyte type = 0;
public ulong mXferID;
private UploadComplete handlerUploadDone;
private UploadAborted handlerAbort;
private bool m_complete = false;
public bool UploadComplete
{
get { return m_complete; }
}
public XferHandler(IClientAPI pRemoteClient, string pClientFilename)
{
m_asset = new AssetBase();
m_asset.FullID = UUID.Zero;
m_asset.Type = type;
m_asset.Data = new byte[0];
m_asset.Name = pClientFilename;
m_asset.Description = "empty";
m_asset.Local = true;
m_asset.Temporary = true;
mXferID = Util.GetNextXferID();
}
public XferHandler(IClientAPI pRemoteClient, UUID fileID)
{
m_asset = new AssetBase();
m_asset.FullID = fileID;
m_asset.Type = type;
m_asset.Data = new byte[0];
m_asset.Name = null;
m_asset.Description = "empty";
m_asset.Local = true;
m_asset.Temporary = true;
mXferID = Util.GetNextXferID();
}
public ulong XferID
{
get { return mXferID; }
}
public void RequestStartXfer(IClientAPI pRemoteClient)
{
if (m_asset.Name != null)
{
pRemoteClient.SendXferRequest(mXferID, m_asset.Type, m_asset.FullID, 0, Utils.StringToBytes(m_asset.Name));
}
else
{
pRemoteClient.SendXferRequest(mXferID, m_asset.Type, m_asset.FullID, 0, new byte[0]);
}
}
/// <summary>
/// Process transfer data received from the client.
/// </summary>
/// <param name="xferID"></param>
/// <param name="packetID"></param>
/// <param name="data"></param>
public void XferReceive(IClientAPI remoteClient, ulong xferID, uint packetID, byte[] data)
{
if (mXferID == xferID)
{
if (m_asset.Data.Length > 1)
{
byte[] destinationArray = new byte[m_asset.Data.Length + data.Length];
Array.Copy(m_asset.Data, 0, destinationArray, 0, m_asset.Data.Length);
Array.Copy(data, 0, destinationArray, m_asset.Data.Length, data.Length);
m_asset.Data = destinationArray;
}
else
{
byte[] buffer2 = new byte[data.Length - 4];
Array.Copy(data, 4, buffer2, 0, data.Length - 4);
m_asset.Data = buffer2;
}
remoteClient.SendConfirmXfer(xferID, packetID);
if ((packetID & 0x80000000) != 0)
{
SendCompleteMessage(remoteClient);
}
}
}
protected void SendCompleteMessage(IClientAPI remoteClient)
{
m_complete = true;
handlerUploadDone = UploadDone;
if (handlerUploadDone != null)
{
handlerUploadDone(m_asset.Name, m_asset.FullID, m_asset.Data, remoteClient);
}
}
public void AbortUpload(IClientAPI remoteClient)
{
handlerAbort = UploadAborted;
if (handlerAbort != null)
{
handlerAbort(m_asset.Name, mXferID, remoteClient);
}
}
}
}
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