Is there a bug in the internet toolkit?

[Bjarne Joergensen]

HI

I am using LV8.2.1 and the internet toolkit.

There is a FTP function called "PWD"(print working directory) who I think got a bug.

It don't put out the working direktory.

It take the reply text ( ex: Current working directory is "fs" and use the subVI "unescabe double quotes.vi" to remove the quotes, but this subVI need to have a string where the hole text is surrounded with double qoutes.

The FTP "PWD" function send a string like this( ex: Current working directory is "fs" to the subVI and that result in an empty string out.

Take a look at the attached pictures.

It's the same in LV8.6.1

regards Bjarne

PS: I have also posted this in the NI forum, but no one reply, so I try here at LAVA

FTP [PWD]_BD.png (5 kb) Unescape Double Quotes_BD.png (11 kb)

[Neville D]

Can you please post jpegs and use the "insert image" icon above so that it is visible in your post.

thanks,

Neville.

[Bjarne Joergensen]

QUOTE (Neville D @ Feb 25 2009, 06:13 PM)

Can you please post jpegs and use the "insert image" icon above so that it is visible in your post.

thanks,

Neville.

Here they are

The little white box with an arrow reprecent the code below!

Remember, this is not my code. This is what NI deliver whith the Internet toolkit(nice style ).

Regards Bjarne

[Phillip Brooks]

I compared your block diagram images to the FTP VIs in LabVIEW 7.0. They are exactly the same (as I expected). The internet toolkit has been around for a long time and if there was a bug, I think someone would have found this long ago.

I believe the problem is with the FTP server you are connecting to. If you see

Current working directory is "fs"

when you connect to the host with a command line FTP client, then the FTP server is not compliant with RFC 959 - File Transfer Protocol (FTP).

The format of a response to a PWD command should be:

257 "fs" is CWD

If the server is returning the string you indicated, then the bug is in the server

[Bjarne Joergensen]

QUOTE (Phillip Brooks @ Feb 26 2009, 01:43 PM)

I compared your block diagram images to the FTP VIs in LabVIEW 7.0. They are exactly the same (as I expected). The internet toolkit has been around for a long time and if there was a bug, I think someone would have found this long ago.

I believe the problem is with the FTP server you are connecting to. If you see

Current working directory is "fs"

when you connect to the host with a command line FTP client, then the FTP server is not compliant with

http://www.ietf.org/rfc/rfc959.txt'

rel='nofollow' target="_blank">RFC 959 - File Transfer Protocol (FTP)

.

The format of a response to a PWD command should be:

257 "fs" is CWD

If the server is returning the string you indicated, then the bug is in the server

Hi Philip

Thank you. :thumbup:

I think you are right about that the bug must be in the server. It is a product of our own.

I will ask the R&D if they are diviating (they must be) from the RFC 959.

regards Bjarne

[Mark Yedinak]

QUOTE (Bjarne Joergensen @ Feb 26 2009, 11:06 AM)

Hi Philip

Thank you. :thumbup:

I think you are right about that the bug must be in the server. It is a product of our own.

I will ask the R&D if they are diviating (they must be) from the RFC 959.

regards Bjarne

I would definitely talk to your R&D about this. The RFC's are there for a reason and it stills baffles me why you find so many home-grown networking implementations that appear like they have never even looked at the RFC. My guess is that your R&D folks simply took the command list and implemented its functionality.