使用凭据连接 ftp 服务器

发布于 2024-10-10 06:37:21 字数 1720 浏览 7 评论 0原文

我正在编写一个使用带有凭据的 ftp 服务器的程序。我正在尝试从服务器检索目录列表,但是当我到达该行时:

string line = reader.ReadLine();

我得到的字符串仅包含:“无法打开\”主机:/ lib1 \“。”

如果我尝试获取另一行,则会引发下一个异常:远程服务器返回错误:(550) 文件不可用(例如,找不到文件,无法访问)。

我确信(使用另一个 ftp 应用程序)ftp 服务器上存在“lib1”目录,并且我的凭据(用户名和密码)是正确的。

这是我的代码:

 public class FTPClient
{
    public string UserName { get; set; }
    public string Password { get; set; }
    public string IpAddress { get; set; }
    public int Port { get; set; }

    public FTPClient(string _userName, string _password, string _address, int _port)
    {
        UserName = _userName;
        Password = _password;
        IpAddress = _address;
        Port = _port;
    }

    public void GetDirectoriesList(string _path)
    {           
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri("ftp://" + 
        IpAddress + _path));
        request.UseBinary = true;
        request.Method = WebRequestMethods.Ftp.ListDirectory;
        request.Credentials = new NetworkCredential(UserName, Password);

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        Stream responseStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(responseStream);

        string line = reader.ReadLine();
        while (line!=null)
        {
            ... //do something with line
            line = reader.ReadLine();
        }
        ...
        reader.Close();
        response.Close();


    }

我按如下方式使用它:

FTPClient ftpClient = new FTPClient("user1", "pass1", "192.168.2.110", 21);

        string dirList = ftpClient.GetDirectoriesList("/lib1");

有人能发现问题吗?

I'm writing a program that uses an ftp server with credentials. I'm trying to retrieve the directory list from the server but when I get to the line:

string line = reader.ReadLine();

the string that I get contains only : "Can't open \"host:/lib1\"."

If I try to get another line, the next exception is thrown: The remote server returned an error: (550) File unavailable (e.g., file not found, no access).

I know for sure (using another ftp application) that 'lib1' directory exists on the ftp server and my credentials (username and password) are correct.

Here is my code:

 public class FTPClient
{
    public string UserName { get; set; }
    public string Password { get; set; }
    public string IpAddress { get; set; }
    public int Port { get; set; }

    public FTPClient(string _userName, string _password, string _address, int _port)
    {
        UserName = _userName;
        Password = _password;
        IpAddress = _address;
        Port = _port;
    }

    public void GetDirectoriesList(string _path)
    {           
        FtpWebRequest request = (FtpWebRequest)WebRequest.Create(new Uri("ftp://" + 
        IpAddress + _path));
        request.UseBinary = true;
        request.Method = WebRequestMethods.Ftp.ListDirectory;
        request.Credentials = new NetworkCredential(UserName, Password);

        FtpWebResponse response = (FtpWebResponse)request.GetResponse();
        Stream responseStream = response.GetResponseStream();
        StreamReader reader = new StreamReader(responseStream);

        string line = reader.ReadLine();
        while (line!=null)
        {
            ... //do something with line
            line = reader.ReadLine();
        }
        ...
        reader.Close();
        response.Close();


    }

And I use it as follows:

FTPClient ftpClient = new FTPClient("user1", "pass1", "192.168.2.110", 21);

        string dirList = ftpClient.GetDirectoriesList("/lib1");

Can anyone spot the problem?

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评论(2

泛泛之交 2024-10-17 06:37:21

我的解决方案:

public string[] GetDirectory()
{
    StringBuilder result = new StringBuilder();
    FtpWebRequest requestDir = (FtpWebRequest)WebRequest.Create("ftp://urserverip/");
    requestDir.Method = WebRequestMethods.Ftp.ListDirectory;
    requestDir.Credentials = new NetworkCredential("username", "password");
    FtpWebResponse responseDir = (FtpWebResponse)requestDir.GetResponse();
    StreamReader readerDir  = new StreamReader(responseDir.GetResponseStream());

    string line = readerDir.ReadLine();
    while (line != null)
    {
        result.Append(line);
        result.Append("\n");
        line = readerDir.ReadLine();
    }

    result.Remove(result.ToString().LastIndexOf('\n'), 1);
    responseDir.Close(); 
    return result.ToString().Split('\n');
}

My solution:

public string[] GetDirectory()
{
    StringBuilder result = new StringBuilder();
    FtpWebRequest requestDir = (FtpWebRequest)WebRequest.Create("ftp://urserverip/");
    requestDir.Method = WebRequestMethods.Ftp.ListDirectory;
    requestDir.Credentials = new NetworkCredential("username", "password");
    FtpWebResponse responseDir = (FtpWebResponse)requestDir.GetResponse();
    StreamReader readerDir  = new StreamReader(responseDir.GetResponseStream());

    string line = readerDir.ReadLine();
    while (line != null)
    {
        result.Append(line);
        result.Append("\n");
        line = readerDir.ReadLine();
    }

    result.Remove(result.ToString().LastIndexOf('\n'), 1);
    responseDir.Close(); 
    return result.ToString().Split('\n');
}
咽泪装欢 2024-10-17 06:37:21

对 Abdul Waheed 的答案进行了一些改进:

  • 添加了 using 块来清理 FtpWebResponse< /code> 和 StreamReader 对象;
  • 减少字符串操作:

    私有静态字符串[] GetDirectoryListing()
    {
        FtpWebRequest directoryListRequest = (FtpWebRequest)WebRequest.Create("ftp://urserverip/");
        DirectoryListRequest.Method = WebRequestMethods.Ftp.ListDirectory;
        DirectoryListRequest.Credentials = new NetworkCredential("用户名", "密码");
    
        使用 (FtpWebResponse directoryListResponse = (FtpWebResponse)directoryListRequest.GetResponse())
        {
            使用 (StreamReader directoryListResponseReader = new StreamReader(directoryListResponse.GetResponseStream()))
            {
                字符串responseString = directoryListResponseReader.ReadToEnd();
                string[] results = responseString.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.RemoveEmptyEntries);
                返回结果;
            }
        }
    }
    

Some refinements to Abdul Waheed's answer:

  • Added using blocks to clean up the FtpWebResponse and StreamReader objects;
  • Reduced string manipulation:

    private static string[] GetDirectoryListing()
    {
        FtpWebRequest directoryListRequest = (FtpWebRequest)WebRequest.Create("ftp://urserverip/");
        directoryListRequest.Method = WebRequestMethods.Ftp.ListDirectory;
        directoryListRequest.Credentials = new NetworkCredential("username", "password");
    
        using (FtpWebResponse directoryListResponse = (FtpWebResponse)directoryListRequest.GetResponse())
        {
            using (StreamReader directoryListResponseReader = new StreamReader(directoryListResponse.GetResponseStream()))
            {
                string responseString = directoryListResponseReader.ReadToEnd();
                string[] results = responseString.Split(new string[] { "\r\n", "\n" }, StringSplitOptions.RemoveEmptyEntries);
                return results;
            }
        }
    }
    
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