[racket] FTP strange behavior

The ftp.datasus server returns the 125 code when a user tries to get
something while connected using passive mode, which is what net/ftp
does. But the code errors because it is only expecting 150 return
codes from the server. I'm inclined to believe it's a bug with
net/ftp, since the transfer completes successfully (the file in the
example code is no longer available but i tried with another site).
I've checked in a fix allowing the 125 return code, but I'm not
familiar enough with ftp protocol to know if there are other cases
that are missing.





On Mon, Feb 7, 2011 at 2:02 PM, Jay McCarthy <jay.mccarthy at gmail.com> wrote:
> I can tell you what it means, but I don't know why it would do it...
>
> 2011/2/7 Eduardo Bellani <ebellani at gmail.com>:
>> Hello list
>>
>> I am getting an error out of this snippet that I think I should not be
>> getting:
>>
>> (require net/ftp)
>>
>>
>> (define conn (ftp-establish-connection "ftp.datasus.gov.br" 21
>> "anonymous" ""))
>>
>> (ftp-cd conn "siasus/Documentos")
>>
>> (ftp-download-file conn "./" "APAC.xls")
>
> This establishes a connection on the side to receive the data. There
> is normally just one per transfer. Maybe the server is sending the
> message multiple times? And so it is trying to open two? Can you use
> WireShark to get a transcript of the session?
>
> Jay
>
>>
>> (ftp-close-connection conn)
>>
>>
>> the error is
>> ftp: exected result code 150, got 125 Data connection already open;
>> Transfer starting.
>>
>> My version is 5.0.2/linux
>>
>> Could anyone tell me what could be wrong?
>>
>> --
>> Eduardo Bellani
>>
>> omnia mutantur, nihil interit.
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>
>
>
> --
> Jay McCarthy <jay at cs.byu.edu>
> Assistant Professor / Brigham Young University
> http://faculty.cs.byu.edu/~jay
>
> "The glory of God is Intelligence" - D&C 93
>
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