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Message-ID: <784063636.30911267610787427.JavaMail.jira@brutus.apache.org>
Date: Wed, 3 Mar 2010 10:06:27 +0000 (UTC)
From: "Philip Yao (JIRA)" <jira@apache.org>
To: issues@commons.apache.org
Subject: [jira] Commented: (NET-61) [net] FTPClient.listFiles() hangs on Red
 Hat Linux
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    [ https://issues.apache.org/jira/browse/NET-61?page=3Dcom.atlassian.jir=
a.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D12840558=
#action_12840558 ]=20

Philip Yao commented on NET-61:
-------------------------------

i have sloved.
My code is not work like this:
--------------------------------------------------------------
public boolean createDirectory(String pathName){=20
=09=09 boolean success =3D true;
=09=09 try{
=09=09=09 if(!ftp.isConnected()) {
=09=09=09=09 this.connectFtpServer();
=09=09=09 }
=09=09=09 pathName =3D new String(pathName.getBytes("GBK"), "iso-8859-1");=
=09=09=20
=09=09=09=20
=09=09=09 FTPFile[] ftpFileArr =3D ftp.listFiles();
=09=09=09 for(FTPFile f : ftpFileArr){
=09=09=09=09 if(pathName.equals(f.getName())){
=09=09=09=09=09 return true;
=09=09=09=09 }
=09=09=09 }
=09=09=09=20
=09=09=09 ftp.makeDirectory(pathName); =20
=09=09 }catch (Exception ie){=20
=09=09=09 logger.error("=E5=88=9B=E5=BB=BA=E7=9B=AE=E5=BD=95=E5=87=BA=E9=94=
=99=EF=BC=81", ie);=20
=09=09=09 success =3D false;
=09=09 }
=09=09 return success;
=09 }
----------------------------------------------------
On the works fine (my notebook).I found the ftp log is :

220 Serv-U FTP Server v6.4 for WinSock ready...
USER user
331 User name okay, need password.
PASS user
230 User logged in, proceed.
CWD ????????
250 Directory changed to /????????
PASV
227 Entering Passive Mode (192,168,137,7,173,212)
227
SYST
215 UNIX Type: L8
PORT 192,168,137,7,4,152
200 PORT Command successful.
LIST
150 Opening ASCII mode data connection for /bin/ls.
226 Transfer complete.

-----------------------------------------------------
On the not work server(DELL 1950) .i found the log is no PASV.


So I change the Code like this:
public boolean createDirectory(String pathName){=20
=09=09 boolean success =3D true;
=09=09 try{
=09=09=09 if(!ftp.isConnected()) {
=09=09=09=09 this.connectFtpServer();
=09=09=09 }
=09=09=09 pathName =3D new String(pathName.getBytes("GBK"), "iso-8859-1");
=09=09=09 ftp.enterLocalPassiveMode();
=09=09=09 FTPFile[] ftpFileArr =3D ftp.listFiles();
=09=09=09 for(FTPFile f : ftpFileArr){
=09=09=09=09 if(pathName.equals(f.getName())){
=09=09=09=09=09 return true;
=09=09=09=09 }
=09=09=09 }
=09=09=09=20
=09=09=09 ftp.makeDirectory(pathName); =20
=09=09 }catch (Exception ie){=20
=09=09=09 logger.error("=E5=88=9B=E5=BB=BA=E7=9B=AE=E5=BD=95=E5=87=BA=E9=94=
=99=EF=BC=81", ie);=20
=09=09=09 success =3D false;
=09=09 }
=09=09 return success;
=09 }
-------------------------------------------------------
Before call ftp.listFiles() , call ftp.enterLocalPassiveMode(); Frist;


> [net] FTPClient.listFiles() hangs on Red Hat Linux
> --------------------------------------------------
>
>                 Key: NET-61
>                 URL: https://issues.apache.org/jira/browse/NET-61
>             Project: Commons Net
>          Issue Type: Bug
>    Affects Versions: 1.4
>         Environment: Operating System: Linux
> Platform: PC
>            Reporter: George Van Treeck
>            Priority: Blocker
>
> A Java app that uses FTPClient to download a file from a website to Windo=
ws XP=20
> works properly. But, when the same app runs on Linux to download the same=
 file=20
> from the same website, it hangs at listFiles().
> Using Java 1.5.0_03 on both the Windows XP and Linux. The version of Linu=
x=20
> used is Fedor Red Hat Linux Core 3 with all the latest updates. The follo=
wing=20
> segment of code from the program demonstrates the problem:
>               FTPClient ftp =3D new FTPClient();
>               ftp.connect(host);
>               reply =3D ftp.getReplyCode();
>               if (!FTPReply.isPositiveCompletion(reply)) {
>                 final String ftpStatus =3D ftp.getReplyString();
>                 ftp.disconnect();
>                 throw new IOException(
>                     "FTP server refused connection. Status: " +
>                    ftpStatus);
>               }
>               ftp.login(user, password);
>               reply =3D ftp.getReplyCode();
>               if (!FTPReply.isPositiveCompletion(reply)) {
>                 final String ftpStatus =3D ftp.getReplyString();
>                 ftp.disconnect();
>                 throw new IOException(
>                     "FTP server refused username/password. Status: " +
>                    ftpStatus);
>               }
>               String[] list =3D ftp.listNames();

--=20
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