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From "Norbert Lazzeri" <elno...@gmx.de>
Subject Re: FTPSClient.listNames()
Date Thu, 16 Apr 2009 15:36:29 GMT
found this issue:
https://issues.apache.org/jira/browse/NET-235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

this solves my problem.

cheers
Norbert

On Thu, 16 Apr 2009 17:18:41 +0200, Norbert Lazzeri <elnogge@gmx.de> wrote:

>
> Hi,
>
> im new to commons-net. for my company-app i need a ftp via ssl  
> connection to upload/retrieve some files
>
> Remote system is UNIX Type: L8
>
> connection works fine, also changing the working directory. however when  
> i try to get a file-listening, i only get a null value / empty  
> result-lists.
>
> getReplyString() says: 521 Data connections must be encrypted
>
>
> i could only find few code-snippets for ftps. here is what ive done  
> (this is mixed groovy/java code, but shouldnt be harder to read than  
> usual java-code). i hope you guyes can give me some hints how to enable  
> encryption:
>
>
>
>          def ftps = new FTPSClient();
>
>          ftps.addProtocolCommandListener(new PrintCommandListener(new  
> PrintWriter(System.out)));
>
>          try {
>              int reply;
>
>              ftps.connect(data.server);
>              //ftps.enterLocalPassiveMode()
>              System.out.println("Connected to " + data.server + ".");
>
>              // After connection attempt, you should check the reply  
> code to verify
>              // success.
>              reply = ftps.replyCode;
>
>              if (!FTPReply.isPositiveCompletion(reply)) {
>                  ftps.disconnect();
>                  System.err.println("FTP server refused connection.");
>                  System.exit(1);
>              }
>              if (ftps.isConnected()) {
>                  try {
>                      if (!ftps.login(data.user, data.password)) {
>                          ftps.logout();
>                          ftps.disconnect();
>                          println("user/password not accepted")
>                          System.exit(1)
>                      } else {
>                          println "login successfull"
>                          System.out.println("Remote system is " +  
> ftps.systemName);
>                      }
>                  }
>                  catch (IOException f) {
>                      System.err.println("Could not connect to server.");
>                      f.printStackTrace();
>                      System.exit(1);
>                  }
>              }
>
> 	    if (!ftps.changeWorkingDirectory(data.userDataDirectory))
>                          println "could not change to directory:  
> ${data.userDataDirectory} "
>
>                      //delete if file allready exists
>                      def filelist = ftps.listFiles()  //a  
> ftps.listNames() returnes null, listFiles returnes an empty list
>                      println ftps.getReplyString()
>                      filelist.each {FTPFile f ->
>                          if (f != null)
>                              if (f.name.equals(resultlist.name))
>                                  ftps.deleteFile(resultlist.name)
>
>          } catch (IOException e) {
>              System.err.println("Could not connect to server.");
>              e.printStackTrace();
>              System.exit(1);
>          }
>
>
> system-out:
> 220 XXXXX
> AUTH TLS
> 234 Proceed with negotiation.
> Connected to XXXXX
> USER XXXXX
> 331 Please specify the password.
> PASS XXXXX
> 230 Login successful.
> login successfull
> SYST
> 215 UNIX Type: L8
> Remote system is UNIX Type: L8
> CWD userdata
> 250 Directory successfully changed.
> PASV
> 227 Entering Passive Mode (194,88,217,30,41,196)
> LIST
> 521 Data connections must be encrypted.
> 521 Data connections must be encrypted.
>
> PASV
> 227 Entering Passive Mode (194,88,217,30,77,95)
> NLST
> 521 Data connections must be encrypted.
>
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