c# - 如何通过网络流 c# 接收大文件？

Question

我通过 TCPClient 和 TCPListener 连接了 2 个设备，我现在只发送一个字符串，它的所有工作:

ASCIIEncoding encoder = new ASCIIEncoding();
byte[] buffer = encoder.GetBytes("Hello Server!");
clientStream.Write(buffer, 0 , buffer.Length);
clientStream.Flush();

然后

bytesRead = clientStream.Read(message, 0, 4096);
ASCIIEncoding encoder = new ASCIIEncoding();
Console.WriteLine("Mensageee"+ encoder.GetString(message, 0, bytesRead));

但现在我需要在上面发送一个大文件，比如 10mb 或更多，所以我应该使用这个吗？

 string doc = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
        byte[] file = File.ReadAllBytes(doc + filedir)
        byte[] fileBuffer = new byte[file.Length];
        TcpClient clientSocket = new TcpClient(ip, port);
        NetworkStream networkStream = clientSocket.GetStream();
        networkStream.Write(file.ToArray(), 0, fileBuffer.GetLength(0));
        networkStream.Close();

我应该如何接收所有这些文件并将其保存在某个地方？ 欢迎任何帮助，谢谢 o/

Answer 1

简短的回答是，您发送一个 byte[]多次...

本质上，您需要用文件的子集填充缓冲区('byte[]'):

int count = fileIO.Read(buffer, 0, buffer.Length);

然后通过套接字发送缓冲区:

clientSocket.Send(buffer, 0, count);

只需执行这两个过程，直到您发送了整个文件...(即 count <= 0 时)但是，服务器必须知道要读取多少字节...所以我们应该首先发送一个Int64与文件的长度。

我们目前拥有的......

using (var fileIO = File.OpenRead(@"C:\temp\fake.bin"))
using(var clientSocket = new System.Net.Sockets.TcpClient(ip, port).GetStream())
{
  // Send Length (Int64)
  clientSocket.Write(BitConverter.GetBytes(fileIO.Length, 0, 8));

  var buffer = new byte[1024 * 8];
  int count;
  while ((count = fileIO.Read(buffer, 0, buffer.Length)) > 0)
    clientSocket.Write(buffer, 0, count);
}

服务器端

Int64 bytesReceived = 0;
int count;
var buffer = new byte[1024*8];

// Read length - Int64
clientStream.Read(buffer, 0, 8);
Int64 numberOfBytes = BitConverter.ToInt64(buffer, 0);

using(var fileIO = File.Create("@c:\some\path"))
  while(bytesReceived < numberOfBytes && (count = clientStream.Read(buffer, 0, buffer.Length)) > 0)
  {
    fileIO.Write(buffer, 0, count);
    bytesReceived += count;
  }