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A pure-java CIFS/SMB client library
There is a newer version: 2.1.10
/* jcifs smb client library in Java
 * Copyright (C) 2000  "Michael B. Allen" 
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package jcifs.smb;


import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLStreamHandler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.CIFSContext;
import jcifs.SmbConstants;
import jcifs.context.SingletonContext;


/**
 * URL handler for transparent smb:// URL handling
 * 
 */
public class Handler extends URLStreamHandler {

    private static final Logger log = LoggerFactory.getLogger(Handler.class);
    static final URLStreamHandler SMB_HANDLER = new Handler();
    private CIFSContext transportContext;


    /**
     * 
     */
    public Handler () {}


    /**
     * @param tc
     */
    public Handler ( CIFSContext tc ) {
        this.transportContext = tc;
    }


    @Override
    protected int getDefaultPort () {
        return SmbConstants.DEFAULT_PORT;
    }


    @Override
    public URLConnection openConnection ( URL u ) throws IOException {
        if ( log.isDebugEnabled() ) {
            log.debug("Opening file " + u);
        }
        return new SmbFile(u, getTransportContext());
    }


    /**
     * @return
     */
    private CIFSContext getTransportContext () {
        if ( this.transportContext == null ) {
            this.transportContext = SingletonContext.getInstance();
        }
        return this.transportContext;
    }


    @Override
    protected void parseURL ( URL u, String spec, int start, int limit ) {
        String host = u.getHost();
        String path, ref;
        int port;

        if ( spec.equals("smb://") ) {
            spec = "smb:////";
            limit += 2;
        }
        else if ( spec.startsWith("smb://") == false && host != null && host.length() == 0 ) {
            spec = "//" + spec;
            limit += 2;
        }
        super.parseURL(u, spec, start, limit);
        path = u.getPath();
        ref = u.getRef();
        if ( ref != null ) {
            path += '#' + ref;
        }
        port = u.getPort();
        if ( port == -1 ) {
            port = getDefaultPort();
        }
        setURL(u, "smb", u.getHost(), port, u.getAuthority(), u.getUserInfo(), path, u.getQuery(), null);
    }
}