networkexplorer.java

实现网上邻居需要的jar库；可以使用库中的接口实现文件共享的功能

/* jcifs smb client library in Java
 * Copyright (C) 2002  "Michael B. Allen" <jcifs at samba dot org>
 * 
 * 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.http;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.text.SimpleDateFormat;
import java.net.UnknownHostException;
import jcifs.*;
import jcifs.http.*;
import jcifs.smb.*;
import jcifs.netbios.NbtAddress;
import jcifs.util.MimeMap;
import jcifs.util.Base64;
import jcifs.util.LogStream;

/**
 * This servlet may be used to "browse" the entire hierarchy of resources
 * on an SMB network like one might with Network Neighborhood or Windows
 * Explorer. The users credentials with be negotiated using NTLM SSP if
 * the client is Microsoft Internet Explorer.
 */

public class NetworkExplorer extends HttpServlet {

    private static LogStream log = LogStream.getInstance();

    private MimeMap mimeMap;
    private String style;
    private NtlmSsp ntlmSsp;
    private boolean credentialsSupplied;
    private boolean enableBasic;
    private boolean insecureBasic;
    private String realm, defaultDomain;

    public void init() throws ServletException {
        InputStream is;
        StringBuffer sb = new StringBuffer();
        byte[] buf = new byte[1024];
        int n, level;
        String name;

        Config.setProperty( "jcifs.smb.client.soTimeout", "600000" );
        Config.setProperty( "jcifs.smb.client.attrExpirationPeriod", "300000" );

        Enumeration e = getInitParameterNames();
        while( e.hasMoreElements() ) {
            name = (String)e.nextElement();
            if( name.startsWith( "jcifs." )) {
                Config.setProperty( name, getInitParameter( name ));
            }
        }

        if( Config.getProperty( "jcifs.smb.client.username" ) == null ) {
            ntlmSsp = new NtlmSsp();
        } else {
            credentialsSupplied = true;
        }

        try {
            mimeMap = new MimeMap();
            is = getClass().getClassLoader().getResourceAsStream( "jcifs/http/ne.css" );
            while(( n = is.read( buf )) != -1 ) {
                sb.append( new String( buf, 0, n, "ISO8859_1" ));
            }
            style = sb.toString();
        } catch( IOException ioe ) {
            throw new ServletException( ioe.getMessage() );
        }

        enableBasic = Config.getBoolean("jcifs.http.enableBasic", false );
        insecureBasic = Config.getBoolean("jcifs.http.insecureBasic", false );
        realm = Config.getProperty("jcifs.http.basicRealm");
        if (realm == null) realm = "jCIFS";
        defaultDomain = Config.getProperty("jcifs.smb.client.domain");

        if(( level = Config.getInt( "jcifs.util.loglevel", -1 )) != -1 ) {
            LogStream.setLevel( level );
        }
        if( log.level > 2 ) {
            try {
                Config.store( log, "JCIFS PROPERTIES" );
            } catch( IOException ioe ) {
            }
        }
    }

    protected void doFile( HttpServletRequest req,
                HttpServletResponse resp, SmbFile file ) throws IOException {
        byte[] buf = new byte[8192];
        SmbFileInputStream in;
        ServletOutputStream out;
        String url, type;
        int n;

        in = new SmbFileInputStream( file );
        out = resp.getOutputStream();
        url = file.getPath();

        resp.setContentType( "text/plain" );

        if(( n = url.lastIndexOf( '.' )) > 0 &&
                ( type = url.substring( n + 1 )) != null &&
                type.length() > 1 && type.length() < 6 ) {
            resp.setContentType( mimeMap.getMimeType( type ));
        }
        resp.setHeader( "Content-Length", file.length() + "" );
        resp.setHeader( "Accept-Ranges", "Bytes" );

        while(( n = in.read( buf )) != -1 ) {
            out.write( buf, 0, n );
        }
    }
    protected int compareNames( SmbFile f1, String f1name, SmbFile f2 ) throws IOException {
        if( f1.isDirectory() != f2.isDirectory() ) {
            return f1.isDirectory() ? -1 : 1;
        }
        return f1name.compareToIgnoreCase( f2.getName() );
    }
    protected int compareSizes( SmbFile f1, String f1name, SmbFile f2 ) throws IOException {
        long diff;

        if( f1.isDirectory() != f2.isDirectory() ) {
            return f1.isDirectory() ? -1 : 1;
        }
        if( f1.isDirectory() ) {
            return f1name.compareToIgnoreCase( f2.getName() );
        }
        diff = f1.length() - f2.length();
        if( diff == 0 ) {
            return f1name.compareToIgnoreCase( f2.getName() );
        }
        return diff > 0 ? -1 : 1;
    }
    protected int compareTypes( SmbFile f1, String f1name, SmbFile f2 ) throws IOException {
        String f2name, t1, t2;
        int i;

        if( f1.isDirectory() != f2.isDirectory() ) {
            return f1.isDirectory() ? -1 : 1;
        }
        f2name = f2.getName();
        if( f1.isDirectory() ) {
            return f1name.compareToIgnoreCase( f2name );
        }
        i = f1name.lastIndexOf( '.' );
        t1 = i == -1 ? "" : f1name.substring( i + 1 );
        i = f2name.lastIndexOf( '.' );
        t2 = i == -1 ? "" : f2name.substring( i + 1 );

        i = t1.compareToIgnoreCase( t2 );
        if( i == 0 ) {
            return f1name.compareToIgnoreCase( f2name );
        }
        return i;
    }
    protected int compareDates( SmbFile f1, String f1name, SmbFile f2 ) throws IOException {
        if( f1.isDirectory() != f2.isDirectory() ) {
            return f1.isDirectory() ? -1 : 1;
        }
        if( f1.isDirectory() ) {
            return f1name.compareToIgnoreCase( f2.getName() );
        }
        return f1.lastModified() > f2.lastModified() ? -1 : 1;
    }
    protected void doDirectory( HttpServletRequest req, HttpServletResponse resp, SmbFile dir ) throws IOException {
        PrintWriter out;
        SmbFile[] dirents;
        SmbFile f;
        int i, j, len, maxLen, dirCount, fileCount, sort;
        String str, name, path, fmt;
        LinkedList sorted;
        ListIterator iter;
        SimpleDateFormat sdf = new SimpleDateFormat( "MM/d/yy h:mm a" );
        GregorianCalendar cal = new GregorianCalendar();

        sdf.setCalendar( cal );

        dirents = dir.listFiles();
        if( log.level > 2 )
            log.println( dirents.length + " items listed" );
        sorted = new LinkedList();
        if(( fmt = req.getParameter( "fmt" )) == null ) {
            fmt = "col";
        }
        sort = 0;
        if(( str = req.getParameter( "sort" )) == null || str.equals( "name" )) {
            sort = 0;
        } else if( str.equals( "size" )) {
            sort = 1;
        } else if( str.equals( "type" )) {
            sort = 2;
        } else if( str.equals( "date" )) {
            sort = 3;
        }
        dirCount = fileCount = 0;
        maxLen = 28;
        for( i = 0; i < dirents.length; i++ ) {
            try {
                if( dirents[i].getType() == SmbFile.TYPE_NAMED_PIPE ) {
                    continue;
                }
            } catch( SmbAuthException sae ) {
                if( log.level > 2 )
                    sae.printStackTrace( log );
            } catch( SmbException se ) {
                if( log.level > 2 )
                    se.printStackTrace( log );
                if( se.getNtStatus() != se.NT_STATUS_UNSUCCESSFUL ) {
                    throw se;
                }
            }
            if( dirents[i].isDirectory() ) {
                dirCount++;
            } else {
                fileCount++;
            }

            name = dirents[i].getName();
            if( log.level > 3 )
                log.println( i + ": " + name );
            len = name.length(); 
            if( len > maxLen ) {
                maxLen = len;
            }

            iter = sorted.listIterator();
            for( j = 0; iter.hasNext(); j++ ) {
                if( sort == 0 ) {
                    if( compareNames( dirents[i], name, (SmbFile)iter.next() ) < 0 ) {
                        break;
                    }
                } else if( sort == 1 ) {
                    if( compareSizes( dirents[i], name, (SmbFile)iter.next() ) < 0 ) {
                        break;
                    }
                } else if( sort == 2 ) {
                    if( compareTypes( dirents[i], name, (SmbFile)iter.next() ) < 0 ) {
                        break;
                    }
                } else if( sort == 3 ) {
                    if( compareDates( dirents[i], name, (SmbFile)iter.next() ) < 0 ) {
                        break;
                    }
                }
            }
            sorted.add( j, dirents[i] );
        }
        if( maxLen > 50 ) {
            maxLen = 50;
        }