這個HttpWebRequest/HttpWebResponse/StreamReader代碼是否有意義？

Question

我沒有加入到我的問題here中，而是添加了一個新的，因爲一旦我連接了我的X-Ray視覺護目鏡查看我的代碼，我就不理睬它。

我什至不記得我在哪裏得到這段代碼，但它是我在某處找到的一個例子的改編。然而，數據似乎並沒有被髮送到服務器。具體而言，此代碼：

public static string SendXMLFile(string xmlFilepath, string uri) 
{ 
    HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri); 

    request.KeepAlive = false; 
    request.ProtocolVersion = HttpVersion.Version10; 

    request.Method = "POST"; 

    StringBuilder sb = new StringBuilder(); 
    using (StreamReader sr = new StreamReader(xmlFilepath)) 
    { 
     String line; 
     while ((line = sr.ReadLine()) != null) 
     { 
      // test to see if it's finding any lines 
      //MessageBox.Show(line); <= works fine 
      sb.AppendLine(line); 
     } 
     byte[] postBytes = Encoding.UTF8.GetBytes(sb.ToString()); 

     request.ContentLength = postBytes.Length; 
     // Did the sb get into the byte array? 
     //MessageBox.Show(request.ContentLength.ToString()); <= shows "112" (seems right) 
     request.KeepAlive = false; 

     request.ContentType = "application/xml"; 

     try 
     { 
      Stream requestStream = request.GetRequestStream(); 
      // now test this: MessageBox.Show() below causing exception? See https://stackoverflow.com/questions/22358231/why-is-the-httpwebrequest-body-val-null-after-crossing-the-rubicon 
      //MessageBox.Show(string.Format("requestStream length is {0}", requestStream.Length.ToString())); 
      requestStream.Write(postBytes, 0, postBytes.Length); 
      MessageBox.Show(string.Format("requestStream length is {0}", requestStream.Length.ToString())); 
      requestStream.Close(); 

      using (var response = (HttpWebResponse)request.GetResponse()) 
      { 
       return response.ToString(); 
      } 
     } 
     catch (Exception ex) 
     { 
      MessageBox.Show("SendXMLFile exception " + ex.Message); 
      request.Abort(); 
      return string.Empty; 
     } 
    } 
} 

...似乎是這樣：

0) Reads the contents of the file at xmlFilepath and puts it into a StreamReader ("sr") 
1) A StringBuilder ("sb") is populated with the contents of the StreamReader 
2) The contents of the StringBuilder are put into an array of Bytes ("postBytes") 
- then here comes the weird part (or so it seems to me, after analyzing the code more closely): 
3) The contents of the array of bytes are written to a Stream ("requestStream") 
4) The Stream is closed (???) 
5) The HttpWebRequest ("request") attempts to return a HttpWebResponse by calling GetResponse() 

• 但到底是什麼 「要求」 包含哪些內容？ （StreamReader => StringBuilder => Array of Bytes => Stream）的內容永遠不會被分配給它！看起來好像Stream的存在只是爲了編寫代碼行，加熱處理器，並放慢操作！

這段代碼無意義了，還是我只是沒有在意它呢？

Answer 1

GetRequestStream()返回一個流，通過HttpWebRequest轉發寫入到網絡。
您的代碼不必要的很長，但是正確無誤。

但是，response.ToString()是錯誤的;你想用StreamReader來閱讀response.GetResponseStream()。