SSH.NET library encode the file name

Question

I must download a file using SSH.NET library. After I download a file I must delete the remote file. Everything works but the file name is encoded. I mean that for example, if I have a file named New file, I download/upload a file named New%20file. Now, if I download/upload the new file I obtain New%25%20file and again New%252520file... and so on... This is very problematic. How can I avoid to change the file name after I download it?

Here the code I am using to download:

string fileName = base.Uri.GetFileName();
string fullPath = Path.Combine(pathFolder, fileName);

using (SftpClient client = new SftpClient(
              new PasswordConnectionInfo(
                    base.Uri.Host, SftpFlowGateway.CONST_PORT_NUMBER,
                    base.Credential.UserName,
                    base.Credential.Password))
      )
{
    client.Connect();

    using (FileStream fileStreamToDownload = new FileStream(fullPath, FileMode.Create))
    {
        client.DownloadFile(base.Uri.LocalPath, fileStreamToDownload);
    }

    client.Disconnect();
}

EDIT:

base.Uri is just defined as follow:

private Uri _uri;
public Uri Uri 
{
    get { return _uri; }
    protected set { _uri = value; } 
}

And the GetFileName method is:

public static string GetFileName(this Uri path)
{
    return path.Segments.Last();
}

When I debug, I can see that the properties of the class Uri have the correct value... It is not encoded

Thank you

Answer 1

You are passing a stream you have created yourself (new FileStream) to the SSH.NET. The library does not even know it's a file it is writing to, nor its name. So it's not the library that URL-encodes the file name. It has to be URL-encoded in the fullPath variable already.

It's the Uri.AbsolutePath and Uri.Segments that return URL-encoded path. That's how the System.Uri class works. I assume you use the constructor overload Uri(string uriString).

Use the static method Uri.UnescapeDataString to reverse encoding done by the Uri constructor.

Note the obsoleted constructor overload Uri(string uriString, bool dontEscape).

Answer 2

It looks like the SSH.Net library simply URL encodes the file names.

I suppose you could rename the file after you've downloaded it using the System.Web.UrlDecode method?

Or UrlEncode the filename when you upload.

Unfortunately, I haven't used the library myself but you could help further by letting us know if the name change occurs on download or upload or both.

EDIT: As martin mentioned, its not the library doing any encoding.

I've just tried it myself.

string fileName = "file with spaces.txt";
using (Stream outputFile = File.OpenWrite(localDir + "\\" + fileName))
{
    sftpClient.DownloadFile(fileName, outputFile);
}

The created file is also named "file with spaces.txt" though that would've been the case anyway since it was created via the stream.