CODEWITHSUNDEEP
c#ftp
Alex Day
Alex Day

Reputation: 39

550 Error when connecting to FTP server. Only occurs with C#

I'm trying to write a program in C# that will FTP into a machine, download some logs, and then delete the logs off of the machine. This process works with a dev FTP server I have to test on my machine but when I try to connect to the production server I want this program to be used on I get a "550 No files found or invalid directory or permission problem" error on the server.

The server will list the directory file for FileZilla, even when using the exact same URI. I have captured the packets with wireshark and the server just cuts off after sending the text "total" to the data port when trying it with C#

Uri uri = new Uri("ftp://username:[email protected]:21/");               
FtpWebRequest ftpWebRequest =  FtpWebRequest)WebRequest.Create(uri.ToString());

ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

// Get the response
FtpWebResponse response = (FtpWebResponse)ftpWebRequest.GetResponse();

// Get the stream and reader
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);

// Close the response
response.Close();

// Get all the results into a list
List<string> results = new List<string>();
results.AddRange(reader.ReadToEnd().Split('\n')); //<---- Web Exception Here

Upvotes: 1

Views: 1278

Answers (1)

Aashish Koirala
Aashish Koirala

Reputation: 448

Please try it this way:

Uri uri = new Uri("ftp://username:[email protected]:21/");               
FtpWebRequest ftpWebRequest = (FtpWebRequest)WebRequest.Create(uri.ToString());
ftpWebRequest.Method = WebRequestMethods.Ftp.ListDirectoryDetails;

using (FtpWebResponse response = (FtpWebResponse)ftpWebRequest.GetResponse())
using (Stream responseStream = response.GetResponseStream())
using (StreamReader reader = new StreamReader(responseStream))
{
    List<string> results = new List<string>();
    results.AddRange(reader.ReadToEnd().Split('\n'));
}

In general it is safest to use using when dealing with streams or other disposable resources.

Upvotes: 2

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