FtpWebRequest:远程服务器返回一个错误：(530)未登录

Question

我一直在接收错误“远程服务器返回了一个错误：(530)没有登录。当调用FtpWebRequest.GetResponse()时。我怀疑这是因为我错误地配置了FTP站点以进行基本身份验证，但我不确定。我读过其他文章，但解决方案似乎围绕着NetworkCredential对象中指定的不正确凭据。我希望能够通过SSL向ftp站点传递凭据。我已经把问题隔离到一个测试项目上了。在这里，主要是从msdn https://msdn.microsoft.com/en-us/library/system.net.ftpwebrequest.enablessl(v=vs.110).aspx复制的。

public static void Main(string[] args)
{
    // Only use this to get around issues with self-signed certificates...
    ServicePointManager.ServerCertificateValidationCallback =
        delegate (object s, X509Certificate certificate, X509Chain chain,
        SslPolicyErrors sslPolicyErrors) { return true; };

    ListFilesOnServerSsl(new Uri("ftp://127.0.0.1:21"));

    Console.WriteLine("Press any key...");
    Console.ReadKey();
}

public static bool ListFilesOnServerSsl(Uri serverUri)
{
    // The serverUri should start with the ftp:// scheme.
    if (serverUri.Scheme != Uri.UriSchemeFtp)
    {
        return false;
    }
    // Get the object used to communicate with the server.
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
    request.Method = WebRequestMethods.Ftp.ListDirectory;
    request.UseBinary = false;
    request.EnableSsl = true;

    // Need to use credentials to log in...
    request.Credentials = new NetworkCredential("TestFtpUser", "IDontKnow");

    // Get the ServicePoint object used for this request, and limit it to one connection.
    // In a real-world application you might use the default number of connections (2),
    // or select a value that works best for your application.

    ServicePoint sp = request.ServicePoint;
    Console.WriteLine("ServicePoint connections = {0}.", sp.ConnectionLimit);
    sp.ConnectionLimit = 1;

    FtpWebResponse response = (FtpWebResponse)request.GetResponse();
    Console.WriteLine("The content length is {0}", response.ContentLength);
    // The following streams are used to read the data returned from the server.
    Stream responseStream = null;
    StreamReader readStream = null;
    try
    {
        responseStream = response.GetResponseStream();
        readStream = new StreamReader(responseStream, System.Text.Encoding.UTF8);

        if (readStream != null)
        {
            // Display the data received from the server.
            Console.WriteLine(readStream.ReadToEnd());
        }
        Console.WriteLine("List status: {0}", response.StatusDescription);
    }
    finally
    {
        if (readStream != null)
        {
            readStream.Close();
        }
        if (response != null)
        {
            response.Close();
        }
    }


    Console.WriteLine("Banner message: {0}",
        response.BannerMessage);

    Console.WriteLine("Welcome message: {0}",
        response.WelcomeMessage);

    Console.WriteLine("Exit message: {0}",
        response.ExitMessage);
    return true;
}

下面是在IIS中的本地主机上创建ftp站点的屏幕截图：

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我注意到，在设置基本身份验证时，IIS没有向我询问密码。我不知道这是为什么。我不应该使用FTP站点的基本身份验证吗？

事先非常感谢！

Answer 1

结果发现，在IIS中配置ftp站点时，我没有在计算机上配置本地用户帐户来匹配“指定的用户”。在转到“控制面板”=>用户帐户“=>”用户帐户“=>”管理用户帐户“=>”管理用户帐户“=>添加”并将用户添加到本地计算机后，"(530)未登录“的消息就消失了。

Answer 2

一般情况下，我在用C#代码连接到FTP服务器时遇到了问题，并得到了一个错误，比如FTPWebRequest 530错误:没有登录。

原来，当我可以用Filezilla连接到ftp时，我试图连接到的FTP站点使用FTP与TLS连接(证明我的凭据用户名和--有效)：

状态:连接建立，等待欢迎信息..。状态:初始化TLS..。状态:验证证书..。状态:建立TLS连接。状态:登录

我只需在我的FtpWebRequest中添加request.EnableSSL = true；然后它工作了，不再收到530错误.示例：

FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
request.Method = WebRequestMethods.Ftp.ListDirectory;
request.EnableSsl = true;

希望这对外面的人有帮助！

TJ