ftprequest.java

Ftp服务1.0

package ranab.server.ftp;

/**
 * Ftp command request class. We can access command, line and argument using 
 * <code>{CMD}, {ARG}</code> within ftp status file. This represents 
 * single Ftp request.
 *
 * @author <a href="mailto:[e-mail]">Rana Bhattacharyya</a>
 */
public
class FtpRequest {
    
    private String mstLine     = null;
    private String mstCommand  = null;
    private String mstArgument = null;
    
    
    /**
     * Constructor.
     *
     * @param commandLine ftp input command line.
     */
    public FtpRequest(String commandLine) {
        mstLine = commandLine.trim();
        parse();
    }
     
    /**
     * Parse the ftp command line.
     */
    private void parse() {
       int spInd = mstLine.indexOf(' ');
       
       if(spInd != -1) {
           mstArgument = mstLine.substring(spInd + 1);
           mstCommand = mstLine.substring(0, spInd).toUpperCase();
       }
       else {
           mstCommand = mstLine.toUpperCase();
       }
       
       if( (mstCommand.length()>0) && (mstCommand.charAt(0)=='X') ) {
           mstCommand = mstCommand.substring(1);
       }
    }
    
    
    /**
     * Get the ftp command.
     */
    public String getCommand() {
        return mstCommand;
    }
    
    /**
     * Get ftp input argument.  
     */ 
    public String getArgument() {
        return mstArgument;
    }
    
    /**
     * Get the ftp request line.
     */
    public String getCommandLine() {
        return mstLine;
    }
    
    /**
     * Has argument.
     */
    public boolean hasArgument() {
        return getArgument() != null;
    }
         
}