Pisces.IM.Client.WPF（持续更新...）

 Pisces.IM.Client.WPF

 服务端监听各个客户端的连接情况

WPF 客户端

 　　　　　　　　　　　　　　　　　　　　　　　　　　　基础聊天

 

文件收发

 

　　　　　　　　　　　　　　历史记录

 

 

WPF 界面部分用到了MaterialDesignThemes(4.9.0)

emoji的支持：Emoji.Wpf(0.3.4)

 Helper

ImageHelper.cs 处理WPF中图像的使用

internal static class ImageHelper
{
    public static BitmapImage ToBitmapImage(this Bitmap bitmap)
    {
        var bitmapImage = new BitmapImage();

        using var ms = new MemoryStream();
        bitmap.Save(ms, ImageFormat.Png);
        bitmapImage.BeginInit();
        bitmapImage.StreamSource = ms;
        bitmapImage.CacheOption = BitmapCacheOption.OnLoad;
        bitmapImage.EndInit();
        bitmapImage.Freeze();

        return bitmapImage;
    }

    public static BitmapImage? ToBitmapImage(this string path)
    {
        if (!File.Exists(path)) return null;

        var bi = new BitmapImage();
        bi.BeginInit();
        bi.UriSource = new Uri(path, UriKind.RelativeOrAbsolute);
        bi.EndInit();
        return bi;
    }

    public static Bitmap ToBitmap(this BitmapSource source)
    {
        var bmp = new Bitmap(source.PixelWidth, source.PixelHeight, PixelFormat.Format32bppArgb);
        var bmpData = bmp.LockBits(new System.Drawing.Rectangle(Point.Empty, bmp.Size),
            ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
        source.CopyPixels(Int32Rect.Empty, bmpData.Scan0, bmpData.Height * bmpData.Stride, bmpData.Stride);
        bmp.UnlockBits(bmpData);

        var temp = new Bitmap(bmp.Width, bmp.Height, PixelFormat.Format32bppArgb);
        var g = Graphics.FromImage(temp);
        g.DrawImage(bmp, new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height));
        g.Dispose();
        return temp;
    }

}

获取系统中默认文件的的icon

        private static ImageSource? GetFileIcon(string? fileName)
        {

            if (!File.Exists(fileName)) return null;

            if (string.IsNullOrEmpty(fileName)) return null;

            var icon = System.Drawing.Icon.ExtractAssociatedIcon(fileName);

            return icon?.ToBitmap().ToBitmapImage();

        }

如下图：

 

Views

ChatView.xaml.cs 

文件的收发

因为目前并未设计服务端进行消息和文件的缓存，所以文件的收发未采用FTP，目前选择Socket直接收发，目前文件限制到50M以内

同时将文件拆分各个小的数据包， 每个小数据包大小为2048byte，并包装成消息收发协议。

文件数据包的发送同样遵照Pisces.IM.Communication中对数据包处理。

发送文件之前，将告诉文件接收方，当文件接收方做好接收准备后并告知发送方可以发送文件数据了。

         var fileTransferInfo = new FileTransferInfo()
         {
             FileId = GenerateIdHelper.GenerateId().ToString(),
             FileExtension = FileHelper.GetFileExtension(file),
             FileHashCode = FileHelper.GetFileSHA256HexString(file),
             FileName = FileHelper.GetFileShortName(file),
             FileSize = FileHelper.GetFileSize(file),
             FromId = _globalDataContext.MySelfID,
             ToId = SelectedItem.Id,
             ReceiverStatus = false,
             SenderStatus = true,
         };

FileExtension ：告知文件的类型

FileHashCode：告知文件的SHA256校验值，防止在传输过程中文件是否被修改或者损坏

FileSize：告知文件的大小

 

文件的拆分与发送

  private void SendFile(FileTransferInfo fileTransferInfo)
  {

      Task.Run(() =>
      {
          if (_globalDataContext == null) return;
          if (_globalDataContext.FileTransfer == null) return;

          var fileTransfer = _globalDataContext.FileTransfer;

          if (string.IsNullOrEmpty(fileTransferInfo.ToId)) return;
          if (string.IsNullOrEmpty(fileTransferInfo.FromId)) return;
          if (string.IsNullOrEmpty(fileTransferInfo.FileId)) return;
          if (string.IsNullOrEmpty(fileTransferInfo.FileName)) return;
          var content = _chatContentViewModel.ChatContents[fileTransferInfo.ToId];

          if (content == null) return;
          var fileContent = content.Where(x => x.FileContent?.FileId == fileTransferInfo.FileId).FirstOrDefault();
          if (fileContent == null) return;
          if (fileContent.FileContent == null) return;
          if (fileTransferInfo.FileSize <= 0) return;

          var sdl = 1024 * 2;
          //Number of slices
          var nos = fileTransferInfo.FileSize / sdl;
          //Final sliced data
          long fsd = fileTransferInfo.FileSize % sdl;

          using var steam = File.OpenRead(fileTransferInfo.FileName);

          if (nos > 0)
          {
              var count = 0;
              while (count < nos)
              {
                  var sd = new byte[sdl];
                  steam.Seek(sdl * count, SeekOrigin.Begin);
                  steam.Read(sd, 0, sdl);
                  var buffer = FilePacketService.Combined(fileTransferInfo.FromId,
                      fileTransferInfo.ToId, 1, sd, fileTransferInfo.FileId);
                  fileTransfer.GetCurrentSocket().Send(buffer);
                  count++;
                  fileContent.FileContent.CurrentFileSize += buffer.Length;
                  fileContent.FileContent.SetProgressValue();
                  Thread.Sleep(5);
              }

              var sd_f = new byte[fsd];
              steam.Seek(sdl * count, SeekOrigin.Begin);
              steam.Read(sd_f, 0, sd_f.Length);
              var buffer_f = FilePacketService.Combined(fileTransferInfo.FromId,
                     fileTransferInfo.ToId, 1, sd_f, fileTransferInfo.FileId);
  
                 fileTransfer.GetCurrentSocket().Send(buffer_f);
     
                  fileContent.FileContent.CurrentFileSize += buffer_f.Length;
                  fileContent.FileContent.SetProgressValue();
             
          }
          else
          {
              var sd = new byte[fileTransferInfo.FileSize];
              steam.Read(sd, 0, sd.Length);
              var buffer = FilePacketService.Combined(fileTransferInfo.FromId,
                                fileTransferInfo.ToId, 1, sd, fileTransferInfo.FileId);

              fileTransfer.GetCurrentSocket().Send(buffer);

              fileContent.FileContent.CurrentFileSize += buffer.Length;
              fileContent.FileContent.SetProgressValue();


          }

          steam.Flush();
          steam.Close();
          fileContent.FileContent.ProcessbarVisibility = Visibility.Hidden;
      });
  }

 

 

 

完整源码：github