// pause download
void PauseToolStripMenuItemClick(object sender, EventArgs e)
{
if (this.InvokeRequired)
{
this.Invoke(new MethodInvoker(() => { this.PauseToolStripMenuItemClick(sender, e); }));
}
else
{
DataGridViewRow row = DownloadsGrid.CurrentRow;
// change row color
row.DefaultCellStyle.ForeColor = Color.Orange;
if (row != null)
{
if (row.Cells[0].Value != null)
{
Objects.Download download = Daemons.Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
if (download != null)
{
download.Active = false;
}
}
}
}
}
/// <summary>
/// Send a new FPR to the peer for download the next not-downloaded file pack of a this file part.
/// </summary>
/// <param name="download">The download object.</param>
/// <param name="Peer">The IP address of peer to send the FPR message.</param>
/// <returns>Return true if the message has been sended.</returns>
private static bool DownloadFirstNotDownloadedFilePack(Objects.Download download, Objects.Peer Peer)
{
for (int i = 0; i < download.ListFileParts.Length; i++)
{
if (download.ListFileParts[i] > 0)
{
int a = i * 128;
for (int n = 0; n < 128; n++)
{
if (download.ListFilePacks[a + n] == false)
{
// start to download the file part
string[] Params = new string[3];
Params[0] = download.Name;
Params[1] = download.SHA1;
Params[2] = ((a + n) * 16384).ToString();
Messages.IMessage FprMess = Messages.MessagesFactory.Instance.CreateMessage(Messages.Commands.FPR, Params);
Peer.Send(FprMess);
return(true);
}
}
}
}
return(false);
}
/// <summary>
/// Send a new FPR to the peer for download a file pack of a not-downloading file part.
/// </summary>
/// <param name="download">The download object.</param>
/// <param name="Peer">The IP address of peer to send the FPR message.</param>
/// <returns>Return true if the message has been sended.</returns>
private static bool StartDownloadNextFilePart(Objects.Download download, Objects.Peer Peer)
{
// the index of the not-downloaded file parts
int[] index = new int[download.RemainingFileParts];
int n = 0;
// get the not-downloaded file parts
for (int i = 0; i < download.ListFileParts.Length; i++)
{
if (download.ListFileParts[i] == 128 || (download.ListFileParts[i] > 0 && i == (download.ListFileParts.Length - 1)))
{
index[n] = i;
n++;
}
}
// select a random not-downloaded file part to download
Random random = new Random();
if (n > 0)
{
while (true)
{
int a = 0;
if (download.RemainingFileParts != 0)
{
a = random.Next(n);
if (download.ListFileParts[index[a]] != 0)
{
// start to download the file part
string[] Params = new string[3];
Params[0] = download.Name;
Params[1] = download.SHA1;
Params[2] = (index[a] * 16384).ToString();
Messages.IMessage FprMess = Messages.MessagesFactory.Instance.CreateMessage(Messages.Commands.FPR, Params);
Peer.Send(FprMess);
return(true);
}
}
else
{
return(false);
}
}
}
else
{
return(false);
}
}
/// <summary>
/// Creates a new download from a exist file in the list of the found files.
/// </summary>
/// <param name="FileName">The name of the file.</param>
/// <param name="FileID">The ID of the file.</param>
public static void AddDownload(string FileName, string FileID)
{
Lists.FilesFoundList.File file = Lists.FilesFoundList.GetFile(FileName, FileID);
Objects.Download download = new Objects.Download(file.Name, file.Size, file.SHA1);
download.Active = true;
download.FindPeers();
if (List.Count > 0)
{
int n = 0;
int max = List.Count - 1;
int min = 0;
int compare = 0;
while (max >= min)
{
n = (max + min) / 2;
compare = FileID.CompareTo(List[n].SHA1);
if (compare > 0)
{
min = n + 1;
}
else if (compare < 0)
{
max = n - 1;
}
else
{
return;
}
}
if (compare < 0)
{
n--;
}
List.Add(List[List.Count - 1]);
for (int i = List.Count - 1; i > n + 1; i--)
{
List[i] = List[i - 1];
}
List[n + 1] = download;
}
else
{
List.Add(download);
}
NewOrUpdatedDownload = true;
}
/// <summary>
/// Adds a download object.
/// </summary>
/// <param name="download">The download object.</param>
public static void AddDownload(Objects.Download download)
{
download.Active = true;
download.FindPeers();
if (List.Count > 0)
{
int n = 0;
int max = List.Count - 1;
int min = 0;
int compare = 0;
while (max >= min)
{
n = (max + min) / 2;
compare = download.SHA1.CompareTo(List[n].SHA1);
if (compare > 0)
{
min = n + 1;
}
else if (compare < 0)
{
max = n - 1;
}
else
{
return;
}
}
if (compare < 0)
{
n--;
}
List.Add(List[List.Count - 1]);
for (int i = List.Count - 1; i > n + 1; i--)
{
List[i] = List[i - 1];
}
List[n + 1] = download;
}
else
{
List.Add(download);
}
NewOrUpdatedDownload = true;
}
void DataGridView_DownloadsCellClick(object sender, System.Windows.Forms.DataGridViewCellEventArgs e)
{
DataGridViewRow row = DownloadsGrid.CurrentRow;
if (row != null)
{
if (row.Cells[0].Value != null)
{
this.SelectedDownload = Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
this.UpdateDownloadInfo();
}
}
}
void DataGridView_DownloadsCellClick(object sender, System.Windows.Forms.DataGridViewCellEventArgs e)
{
DataGridViewRow row = DownloadsGrid.CurrentRow;
if (row != null)
{
if (row.Cells[0].Value != null)
{
this.SelectedDownload = Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
this.UpdateDownloadInfo();
}
}
}
void DataGridView_DownloadsSelectionChanged(object sender, EventArgs e)
{
this.m_bOpenContextMenuStripDownloadsGrid = true;
DataGridViewRow row = DownloadsGrid.CurrentRow;
if (row != null)
{
if (row.Cells[0].Value != null)
{
this.SelectedDownload = Daemons.Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
this.UpdateSelectedDownloadInfo();
}
}
}
// pause download
void PauseToolStripMenuItemClick(object sender, EventArgs e)
{
DataGridViewRow row = DownloadsGrid.CurrentRow;
if (row != null)
{
if (row.Cells[0].Value != null)
{
Objects.Download download = Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
if (download != null)
{
download.Active = false;
}
}
}
}
/// <summary>
/// Save the info of the pending downloads in the file of the pending downloads.
/// </summary>
public static void SavePendingDownloadsInfo()
{
// create the file
XmlDocument XmlDoc = new XmlDocument();
XmlDoc.LoadXml("<PENDING_DOWNLOADS></PENDING_DOWNLOADS>");
// write in the file
XmlElement element = null;
for (int i = 0; i < Daemons.Downloader.List.Count; i++)
{
Objects.Download download = Daemons.Downloader.List[i];
if (download.Completed == false)
{
element = XmlDoc.CreateElement("_" + download.SHA1);
XmlElement name = XmlDoc.CreateElement("NAME");
name.InnerText = download.Name;
element.AppendChild(name);
XmlElement size = XmlDoc.CreateElement("SIZE");
size.InnerText = download.Size.ToString();
element.AppendChild(size);
XmlElement filePacks = XmlDoc.CreateElement("FILE_PACKS");
filePacks.InnerText = Utilities.Converterer.ConvertBitToHex(download.ListFilePacks);
element.AppendChild(filePacks);
XmlDoc.DocumentElement.AppendChild(element);
}
}
// save the file
XmlTextWriter writer = new XmlTextWriter(Global.iKiwiPath + "PendingDownloads.xml", null);
writer.Formatting = Formatting.Indented;
XmlDoc.Save(writer);
writer.Flush();
writer.Close();
}
/// <summary>
/// Control if there is the minimum number of uploader peers else get other uploader peers.
/// </summary>
/// <param name="download">The download object.</param>
/// <returns>Return true if there is the minimum number of the uploader peers else return false.</returns>
private static bool CheckMinNumberOfUploaderPeers(Objects.Download download)
{
if (download.ListUploaderPeers.Count < NumPeersForEachDownloads)
{
System.Random random = new Random();
while (download.ListUploaderPeers.Count < NumPeersForEachDownloads)
{
// control if there are peers that have this file
if (download.ListPeers.Count == 0)
{
download.FindPeers();
}
if (download.ListPeers.Count > download.ListUploaderPeers.Count)
{
// get a casual peer
Objects.Peer peer = download.ListPeers[random.Next(download.ListPeers.Count)];
// control if the peer is already an uploader
if (download.SearchUploaderPeer(peer.Key) == null)
{
// add the peer in the list of the uploader peers of the download
download.AddUploaderPeer(peer);
// send a FPR message to the new uploader peer
if (StartDownloadNextFilePart(download, peer) == false)
{
DownloadFirstNotDownloadedFilePack(download, peer);
}
}
}
else
{
return(false);
}
}
return(true);
}
else
{
return(true);
}
}
/// <summary>
/// Manage the uploader peers of a download.
/// </summary>
/// <param name="Download">The download object.</param>
private static void ManageUploaderPeers(Objects.Download Download)
{
CheckMinNumberOfUploaderPeers(Download);
// search the slowest uploader peer
int slowestDownloadSpeed = 0;
int b = 0;
for (int i = 0; i < Download.ListUploaderPeers.Count; i++)
{
if (Download.ListUploaderPeers[i].DownloadSpeed < slowestDownloadSpeed)
{
b = i;
slowestDownloadSpeed = Download.ListUploaderPeers[i].DownloadSpeed;
}
// control if the download speed of the peer is zero
if (Download.ListUploaderPeers[i].DownloadSpeed == 0)
{
// send a new FPR-message to the peer
DownloadFirstNotDownloadedFilePack(Download, Download.ListUploaderPeers[i]);
}
}
if (Download.ListUploaderPeers.Count >= NumPeersForEachDownloads)
{
// remove the slowest uploader peer
Download.ListUploaderPeers.RemoveAt(b);
// add a new uploader peer
CheckMinNumberOfUploaderPeers(Download);
}
}
/// <summary>
/// Logs a downloaded file pack and send a new FPR message if is necessary.
/// </summary>
/// <param name="Download">The download object.</param>
/// <param name="StartPoint">The star point of the file pack.</param>
/// <param name="SenderPeer">The sender peer object.</param>
/// <param name="Status">If the file-pack has been written or not ( other ).</param>
public static void LogFilePack(Objects.Download Download, int StartPoint, Objects.Peer SenderPeer, Status_FilePack Status)
{
// indicate the downloading of a file pack
SenderPeer.FilePackDownloaded = true;
if (Status == Status_FilePack.Written)
{
#region ...
int filePackNum = StartPoint / 16384;
int filePartNum = StartPoint / 2097152;
// control if the file pack is already been downloaded
if (Download.ListFilePacks[filePackNum] == false)
{
// update the list of file packs
Download.ListFilePacks[filePackNum] = true;
// update the number of remaining file packs
Download.RemainingFilePacks--;
// update the list of file parts
Download.ListFileParts[filePartNum]--;
// control if the file part is completed
if (Download.ListFileParts[filePartNum] == 0)
{
// update the number of remaining file parts
Download.RemainingFileParts--;
// control if the download is finished
if (Download.RemainingFilePacks == 0)
{
// move the completed download from temp-directory to shared-directory
File.Move(Global.TempDirectory + Download.Name, Global.SharedDirectory + Download.Name);
// update download's informations
Download.Progress = 100;
Download.Active = false;
}
else
{
// send a new FPR to the peer for the next not downloaded file pack of a new file part
StartDownloadNextFilePart(Download, SenderPeer);
}
}
else
{
// send a new FPR to the peer for the next not downloaded file pack of a this file part
if (DownloadNextFilePackOfAFilePart(filePackNum, filePartNum, Download, SenderPeer) == false)
{
StartDownloadNextFilePart(Download, SenderPeer);
}
}
// log the file pack
Download.LogFilePack(SenderPeer.IP, filePackNum);
NewOrUpdatedDownload = true;
}
#endregion
}
// if the FilePack is damaged, will send a new FPR-mess to the peer;
else if (Status == Status_FilePack.Damaged)
{
#region ...
string[] Params = new string[3];
Params[0] = Download.Name;
Params[1] = Download.SHA1;
Params[2] = StartPoint.ToString();
Messages.IMessage FprMess = Messages.MessagesFactory.Instance.CreateMessage(Messages.Commands.FPR, Params);
SenderPeer.Send(FprMess);
#endregion
}
}
/// <summary>
/// Start to manages, in background, the download-operations.
/// </summary>
public static void Start()
{
if (m_mainThread != null)
{
// close the deamon
Close();
}
Thread t = new Thread(new ParameterizedThreadStart(
delegate
{
// start a timer to update the downloads
System.Timers.Timer timer = new System.Timers.Timer(1000);
timer.Elapsed += new ElapsedEventHandler(
delegate
{
for (int i = 0; i < m_downloadsList.Count; i++)
{
try
{
// update the download rate info of this downloads
m_downloadsList[i].UpdateDownloadRateInfo();
}
catch
{
}
}
});
timer.Start();
// manage the downloads
while (true)
{
for (int i = 0; i < m_downloadsList.Count; i++)
{
Objects.Download download = m_downloadsList[i];
if (download.Active == true)
{
ManageUploaderPeers(download);
// control if the download speed is 0
if (download.DownloadSpeed == 0)
{
for (int n = 0; n < download.ListPeers.Count; n++)
{
DownloadFirstNotDownloadedFilePack(download, download.ListPeers[n]);
}
}
}
}
Thread.Sleep(5000);
}
}));
t.Name = "Downloader";
t.IsBackground = true;
t.Start();
m_mainThread = t;
}
/// <summary>
/// Process a file pack.
/// </summary>
/// <param name="FileName">The name of the file.</param>
/// <param name="FileID">The ID of the file.</param>
/// <param name="StartPoint">The star point of the file pack.</param>
/// <param name="PackID">The ID of the binary data.</param>
/// <param name="Binary">The binary data.</param>
/// <param name="SenderPeer">The sender peer object.</param>
public static void ProcessFilePack(string FileName, string FileID, int StartPoint, string PackID, byte[] Binary, Objects.Peer SenderPeer)
{
Objects.Download download = Downloader.SearchDownload(FileName, FileID);
// control if exist this download and if it is actived
if (download != null && download.Active == true)
{
// control that the binaryPack isn't damaged
SHA1 sha1 = new SHA1CryptoServiceProvider();
if (PackID == BitConverter.ToString(sha1.ComputeHash(Binary)).Replace("-", ""))
{
#region Write to the file
while (true)
{
try
{
// open ( or create ) the file ( in temp-directory )
FileStream fs = new FileStream((Global.TempDirectory + @"\" + FileName), FileMode.OpenOrCreate);
// lock the access to file
fs.Lock(StartPoint, 16384);
// set the start-point
fs.Seek(StartPoint, SeekOrigin.Begin);
int count = 16384;
if ((download.Size - StartPoint) < 16384)
{
count = ((int)download.Size - StartPoint);
}
// write the filePack in the file ( temp )
fs.Write(Binary, 0, count);
// unlock the access to file
fs.Unlock(StartPoint, 16384);
fs.Close();
// log the file pack
Downloader.LogFilePack(download, StartPoint, SenderPeer, Downloader.Status_FilePack.Written);
break;
}
catch (IOException) // the file is already locked
{
Thread.Sleep(1);
}
catch (Exception ex) // other problem
{
Utilities.Log.Write("Downloader.cs: error to write in a file: \n" + ex.Message, Utilities.Log.LogCategory.Error);
break;
}
}
#endregion
}
else
{
// log
// communicate to Downloader that the FilePack is damaged
Downloader.LogFilePack(download, StartPoint, SenderPeer, Downloader.Status_FilePack.Damaged);
}
}
}
/// <summary>
/// Creates a new download from a exist file in the list of the found files.
/// </summary>
/// <param name="FileName">The name of the file.</param>
/// <param name="FileID">The ID of the file.</param>
public static void AddDownload(string FileName, string FileID)
{
Lists.FilesFoundList.File file = Lists.FilesFoundList.GetFile(FileName, FileID);
Objects.Download download = new Objects.Download(file.Name, file.Size, file.SHA1);
download.Active = true;
download.FindPeers();
if (List.Count > 0)
{
int n = 0;
int max = List.Count - 1;
int min = 0;
int compare = 0;
while (max >= min)
{
n = (max + min) / 2;
compare = FileID.CompareTo(List[n].SHA1);
if (compare > 0)
{
min = n + 1;
}
else if (compare < 0)
{
max = n - 1;
}
else
{
return;
}
}
if (compare < 0)
{
n--;
}
List.Add(List[List.Count - 1]);
for(int i = List.Count - 1; i > n + 1; i--)
{
List[i] = List[i - 1];
}
List[n + 1] = download;
}
else
{
List.Add(download);
}
NewOrUpdatedDownload = true;
}
/// <summary>
/// Update the grid of the downloads.
/// </summary>
private void UpdateDownloadGrid()
{
if (this.InvokeRequired)
{
this.Invoke(new MethodInvoker(() => { this.UpdateDownloadGrid(); }));
}
else
{
DataGridViewRowCollection rows = this.DownloadsGrid.Rows;
if (rows.Count > Daemons.Downloader.Count)
{
rows.Clear();
}
for (int i = 0; i < Daemons.Downloader.Count; i++)
{
Objects.Download download = Daemons.Downloader.List[i];
if (i >= rows.Count)
{
rows.Add(
download.Name,
Utilities.Converterer.AutoConvertSizeFromByte(download.CurrentSize),
download.Progress.ToString("F") + "%",
Utilities.Converterer.AutoConvertSizeFromByte(download.DownloadSpeed) + "/s",
Utilities.Converterer.AutoConvertSizeFromByte(download.Size),
download.SHA1);
}
else
{
rows[i].SetValues(
download.Name,
Utilities.Converterer.AutoConvertSizeFromByte(download.CurrentSize),
download.Progress.ToString("F") + "%",
Utilities.Converterer.AutoConvertSizeFromByte(download.DownloadSpeed) + "/s",
Utilities.Converterer.AutoConvertSizeFromByte(download.Size),
download.SHA1);
}
// change the color of the row
Color rowColor;
if (download.Active)
{
rowColor = Color.Blue;
}
else
{
if (download.Completed)
{
rowColor = Color.Green;
}
else
{
rowColor = Color.Orange;
}
}
rows[i].DefaultCellStyle.ForeColor = rowColor;
}
}
}
void DataGridView_DownloadsSelectionChanged(object sender, EventArgs e)
{
this.m_bOpenContextMenuStripDownloadsGrid = true;
DataGridViewRow row = DownloadsGrid.CurrentRow;
if (row != null)
{
if (row.Cells[0].Value != null)
{
this.SelectedDownload = Daemons.Downloader.SearchDownload(row.Cells[0].Value.ToString(), row.Cells[5].Value.ToString());
this.UpdateSelectedDownloadInfo();
}
}
}
/// <summary>
/// Send a new FPR to the peer for download the next not-downloaded file pack of a this file part.
/// </summary>
/// <param name="filePackNum">The number of the file pack.</param>
/// <param name="filePartNum">The number of the file part.</param>
/// <param name="download">The download object.</param>
/// <param name="Peer">The IP address of peer to send the FPR message.</param>
/// <returns>Return true if the message has been sended; return false if the file part is completed.</returns>
private static bool DownloadNextFilePackOfAFilePart(int filePackNum, int filePartNum, Objects.Download download, Objects.Peer Peer)
{
int nPack = filePackNum;
int partEnd = (filePartNum * 128) + 128;
for (int i = 0; i < 128; i++)
{
if (nPack < download.ListFilePacks.Length)
{
if (download.ListFilePacks[nPack] == false)
{
// download this file pack
string[] Params = new string[3];
Params[0] = download.Name;
Params[1] = download.SHA1;
Params[2] = (nPack * 16384).ToString();
Messages.IMessage FprMess = Messages.MessagesFactory.Instance.CreateMessage(Messages.Commands.FPR, Params);
Peer.Send(FprMess);
return(true);
}
}
else
{
return(false);
}
if (nPack < partEnd)
{
nPack++;
}
else
{
nPack = filePartNum * 128;
}
}
return(false);
}
