连接到ftps:// URL

Question

我正在尝试使用此代码将文件上传到FTP,我遇到的问题是当语法命中时serverURI.Scheme != Uri.UriSchemeFtp它返回false.这是否意味着我的URI地址设置不正确？我知道这是一个有效的地址,我使用ftptest.net来验证网站是否正常运行.我的语法有什么不对？

private void button1_Click(object sender, EventArgs e)
{
  Uri serverUri = new Uri("ftps://afjafaj.org");
  string userName = "Ricard";
  string password = "";
  string filename = "C:\\Book1.xlsx";
  ServicePointManager.ServerCertificateValidationCallback = AcceptAllCertificatePolicy;
  UploadFile(serverUri, userName, password, filename);
}

public bool AcceptAllCertificatePolicy(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
  return true;
}

public bool UploadFile(Uri serverUri, string userName, string password, string fileName)
{
  if (serverUri.Scheme != Uri.UriSchemeFtp)
    return false;

  try
  {
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
    request.EnableSsl = true;
    request.Credentials = new NetworkCredential(userName, password);
    request.Method = WebRequestMethods.Ftp.UploadFile;
    StreamReader sourceStream = new StreamReader(fileName);
    byte[] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
    sourceStream.Close();
    request.ContentLength = fileContents.Length;
    Stream requestStream = request.GetRequestStream();
    requestStream.Write(fileContents, 0, fileContents.Length);
    requestStream.Close();

    FtpWebResponse response = (FtpWebResponse)request.GetResponse();
    Console.WriteLine("Response status: {0}", response.StatusDescription);
  }
  catch (Exception exc)
  {
    throw exc;
  }
  return true;
}

Answer 1

该ftps://前缀是不是一个标准的IANA URI方案.RFC 1738ftp://定义了唯一的方案.

无论如何,ftps://某些软件仍然认为它指的是FTP over TLS/SSL协议(安全FTP).这种模仿https://方案是HTTP over TLS/SSL(https://是标准方案).

虽然ftps://.NET框架无法识别.

要通过TLS/SSL 连接到显式模式FTP,请将您的URI更改为ftp://,并设置FtpWebRequest.EnableSsl为true(您已经在做什么).

请注意,ftps://前缀通常是指通过TLS/SSL 的隐式模式FTP..NET框架仅支持显式模式.虽然你的URI确实是指隐式模式,但大多数服务器都支持显式模式.所以这通常不会成为问题.对于显式模式,ftpes://有时使用.请参阅我的文章,了解FTP over TLS/SSL隐式和显式模式之间的区别.