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From Kevin Dougan <>
Subject RE: Question about FTPClient.sendCommand()
Date Tue, 02 Jun 2009 12:38:43 GMT

Hi and thanks for your reply. I'll try and give an example to illustrate...


Let's say there's a file that contains the following lines:

   CWD /home/sampleuser/

   PUT localfile.txt remotefile.txt

I am building a Java Class that will be "dumb", in the sense that it will just open the file
(after connecting to the FTP Server using some other properties), and issue the commands it
finds in that file. The idea is that the caller can dynamically build a file of commands,
and the program does not have to parse them individually and decide what they are, the program
can simply pass them along to the FTP Server.


Therefore, I was thinking that I could use the FTPClient.sendCommand() method to simple forward
those commands, but it is not working.


I do NOT want to do the following: line from file: PUT localfile.txt remotefile.txt

...decide which API method to call: if (line.startsWith("PUT")) client.storeFile(remoteFile,
localFile); else if (line.statrsWith("GET"))...etc, etc


However, I am trying to do something more simple, like the following: line from file: PUT localfile.txt remotefile.txt

...pass the command along next line from file: : : : 

...pass the command along: : : :

...etc, etc



> From:
> To:
> Subject: Re: Question about FTPClient.sendCommand()
> Date: Tue, 2 Jun 2009 08:29:55 -0400
> I'm not sure if I understand what you're trying to accomplish. Are you
> sending FTP commands to the FTP server? If so, what command? Or are you
> trying to send operating system shell script commands? The FTP server is
> only going to accept commands it understands and supports, which is not the
> same as OS shell scripts.
> ----- Original Message ----- 
> From: "Kevin Dougan" <>
> To: <>
> Sent: Tuesday, June 02, 2009 7:14 AM
> Subject: Question about FTPClient.sendCommand()
> Greetings!
> I have been searching around a lot, trying to figure out how to properly use
> the FTPClient.sendCommand() API method, but to no avail! Perhaps someone
> here can answer my question very quickly...?
> Basically, I want to implement a "dumb" FTP class who handles "batch
> processing". I thought I could just read lines from a file, and then pass
> them through to an FTP Server using the sendCommand() method, but it always
> replies with "command not understood".
> Am I totally off track with what I want to do here? Am I using the API
> method incorrectly or for the wrong purpose?
> I am trying to avoid parsing every command, doing a String compare on each
> word, and then trying to match it against a specific API method
> (storeFile(), retrieveFile(), etc.), depending on each String I parse...big,
> long IF blocks are ugly!
> Thanks!
> Kevin
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