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<pre>public class <span class="strong">Client</span>
extends org.apache.commons.net.ftp.FTP</pre>
<div class="block">Client.java encapsulates functionalities necessary for nutch to
 get dir list and retrieve file from an FTP server.
 This class takes care of all low level details of interacting
 with an FTP server and provides a convenient higher level interface.

 Modified from FtpClient.java in apache commons-net.
 
 Notes by John Xing:
 ftp server implementations are hardly unif