Authorizing using http-01 validation (FTP) - upload Failed

[svarga91]

win-acme/src/main.lib/Clients/FtpClient.cs

Line 48 in 5186bf6

public async Task Upload(string ftpPath, string content)

2022-07-24 13:55:37.736 +02:00 [INF] [xxx.com] Authorizing using http-01 validation (FTP)
2022-07-24 13:55:37.959 +02:00 [INF] Established connection with ftp server at 19.105.158.190:21, encrypted: true
2022-07-24 13:55:38.126 +02:00 [WRN] Upload ftp://19.105.158.190:21/www/.well-known/acme-challenge/2pRO5RqE3-aO3ig3XqUhwNtHDu-2FLfylhG7rxKF1u0 status "Failed"

File is created but is empty.

[WouterTinus]

Do you have a log from the FTP servers side?

[svarga91]

I tried to use latest version of FluentFTP but still the same issue. File is created but empty.

var status = await client.UploadBytesAsync(Encoding.UTF8.GetBytes(content), uri.PathAndQuery, FtpRemoteExists.Overwrite, true);

I dont have access to ftp logs. I will have to setup some ftp server on localhost.

[WouterTinus]

You can try adding this code to capture log output from the client side, that might provide some insights:

client.OnLogEvent += (level, message) =>
{
    switch (level)
    {
        case FtpTraceLevel.Verbose:
            _log.Verbose("FTP: {message}", message);
            break;
        case FtpTraceLevel.Info:
            _log.Information("FTP: {message}", message);
            break;
        case FtpTraceLevel.Warn:
            _log.Warning("FTP: {message}", message);
            break;
        case FtpTraceLevel.Error:
            _log.Error("FTP: {message}", message);
            break;
    }
};`

[WouterTinus]

Additional logs are captured in v2.1.23 and FluentFTP was updated to the latest release.

[svarga91]

Thank you. It looks like old server version issue.
See related robinrodricks/FluentFTP#1219 (comment)

I also got Received an unexpected EOF or 0 bytes from the transport stream.

[svarga91]

FYI: using the GnuTLS library instead of Microsoft's native TLS solved my problem.
Thank you for such a great tool 😄