使用TCP客戶端接收多個文件

Question

我想創建一個TcpClient，它通過名稱自動從服務器獲取多個文件。

我想了解一下我如何構建這樣的應用程序。

我的想法是：

做一個for循環包含SwitchCase，在這裏我指定我的文件名。我真的不知道這是否會奏效。

要走出for循環，我可以將索引運算符與文件數進行比較。如果他們相等，那麼我會退出循環。我的想法

例子：

for (int i = 1; i <= 4; i++) 
{ 

switch (----) 
     { 
      case 'file1': 
       code... 
       break; 
      case 'file2': 
       code... 
      case 'file3': 
       code... 
       break; 
      case 'file4': 
       code... 
       break; 
      default: 
       code... 
       break; 
     } 

} 

Answer 1

我解決它像這樣：

我的應用程序。從服務器獲取2個文件並移動文件並重命名它們。

測試= mytest的 test111 = TEST2

static string myfile1 = @"C:\inbox\mytest.txt"; 
    static string myfile2 = @"C:\inbox\test2.txt"; 
    //files from server   
    static string myServerfile = @"C:\Users\me\Documents\file_client\bin\Debug\test.csv"; 
    static string myServerfile1 = @"C:\Users\RH-T3\Documents\file_client\bin\Debug\test111.txt"; 


public static void Main(string[] args) 
    { 
      try 
      { 
       for (int i = 0; i < 2; i++) 
       { 
        if (i == 0) 
        { 
         Console.WriteLine("Downloading test.csv"); 
         string fileName = "test.csv"; 
         Console.WriteLine("Client starts..."); 
         //args[0] = Console.ReadLine(); 
         file_client client = new file_client(args); 
         Console.WriteLine("efter file_client..."); 
         NetworkStream serverStream = client.clientSocket.GetStream(); 
         LIB.writeTextTCP(serverStream, fileName); 
         long rest = long.Parse(LIB.readTextTCP(serverStream)); 

         byte[] inStream = new byte[rest]; 

         while (rest != 0) 
         { 
          rest = rest - serverStream.Read(inStream, 0, inStream.Length); 
          Console.WriteLine("REST: " + rest); 

         } 
         FileStream fs = new FileStream(fileName,       FileMode.Create); 
         fs.Write(inStream, 0, inStream.Length); 
         { 
          fs.Close(); 
          serverStream.Close(); 
         } 
         if (File.Exists(myfile1)) 
         { 
          File.Delete(myfile1); 
         } 
         File.Move(myServerfile, myfile1); 

         Console.WriteLine("Moved"); 
         System.Threading.Thread.Sleep(500); 
        } 
        else 
         { 
         Console.WriteLine("Downloading .txt file"); 
         string fileName = "test111.txt"; 
         Console.WriteLine("Client starts..."); 
         //args[0] = Console.ReadLine(); 
         file_client client = new file_client(args); 
         Console.WriteLine("efter file_client..."); 
         NetworkStream serverStream = client.clientSocket.GetStream(); 
         LIB.writeTextTCP(serverStream, fileName); 
         long rest = long.Parse(LIB.readTextTCP(serverStream)); 
         byte[] inStream = new byte[rest]; 
         while (rest != 0) 
         { 
      rest = rest - serverStream.Read(inStream, 0, inStream.Length); 
          Console.WriteLine("REST: " + rest); 
         } 
         FileStream fs = new FileStream(fileName,       FileMode.Create); 
         fs.Write(inStream, 0, inStream.Length); 
         { 
          fs.Close(); 
          serverStream.Close(); 
         } 
         if (File.Exists(myfile2)) 
         { 
          File.Delete(myfile2); 
         } 
         File.Move(myServerfile1, myfile2); 

         Console.WriteLine("Moved"); 
         System.Threading.Thread.Sleep(500); 
        } 
       } 
     } 
       catch (Exception ex) 
      { 
       Console.WriteLine(ex.ToString()); 
       Console.WriteLine("Cannot be DONE!"); 
      } 

Answer 2

使用FTP，你可以使用下載文件時FtpWebRequest和HTTP使用HttpWebRequest。 下面是如何請求使用http一個文件一個簡單的例子（該方法用於ftp的類似）：

public void Download(string url, string localPath) 
{ 
    HttpWebRequest request = HttpWebRequest.Create(url); 
    HttpWebResponse response = request.GetResponse() as HttpWebResponse; 
    Stream stream = response.GetResponseStream(); 
    FileStream fs = new FileStream(localPath, FileMode.Create); 

    int count; 
    byte[] buffer = new byte[8096]; 
    while ((count = stream.Read(buffer, 0, 8096)) > 0) 
     fs.Write(buffer, 0, count); 

    fs.Dispose(); 
    response.Close(); 
} 

代替使用開關內部的for循環的你應該迭代的數組：

string[] files = new string[]{ url1, url2, ...}; 
for(int i = 0; i < files.Length; i++) 
{ 
    Download(files[i], "file" + i); 
}