Directory lister for the web.

Question

Hi
Here iam attaching my project code for my particualr aplication
The source code for a directory lister for the web. You give it
one or more URLs as arguments and its not displays the formatted results .. can any body will help me
import java.util.*;
import java.net.*;
import java.io.*;
public class WebList extends abcd.Application
static final String progName = "WebList";
public static void main( String[] args )
(new WebList()).compat( args );
public int newMain( String[] args )
int argc = args.length;
if ( argc == 0 )
usage();
return -1;
for ( int argn = 0; argn < argc; argn++ )
if ( argc > 1 )
if ( argn > 0 )
out.println( "" );
out.println( args[argn] + ":" );
list( args[argn] );
return 0;
private void usage()
err.println( "usage: " + progName + " URL ..." );
void list( String urlStr )
String base = abcd.Utils.baseUrlStr( urlStr );
Enumeration as;
try
as = new abcd.Spider( urlStr, err );
catch ( MalformedURLException e )
err.println( e );
return;
while ( as.hasMoreElements() )
URLConnection uc = as.nextElement();
if ( uc == null )
continue;
URL thisUrl = uc.getURL();
String thisUrlStr = thisUrl.toExternalForm();
if ( thisUrlStr.startsWith( base ) )
thisUrlStr = thisUrlStr.substring( base.length() );
if ( thisUrlStr.length() == 0 )
thisUrlStr = ".";
String mimeType = uc.getContentType();
int len = uc.getContentLength();
long mod = uc.getLastModified();
Date modDate = new Date( mod );
String modDateStr = abcd.Utils.lsDateStr( modDate );
out.println(
abcd.Fmt.fmt( mimeType, 14, abcd.Fmt.LJ ) + " " +
abcd.Fmt.fmt( len, 8 ) + " " +
modDateStr + " " + thisUrlStr );
try
InputStream in = uc.getInputStream();
in.close();
catch ( IOException e ) {}
}

Answer 1

Hi,
It is enumerating the files reachable at or
below those URLs, i hope it will full fill your application requirements.
and also in the for loop you have to do pre increment not post increment so it may be the casue for entier your logic ..
as per my knowledge iam changing the code .. i hope it will work for your application...
still if you have any querys please post me with details of your projects so that i can help you more..
here is modified code:
=================
import java.util.*;
import java.net.*;
import java.io.*;
public class WebList extends abcd.Application
static final String progName = "WebList";
public static void main( String[] args )
(new WebList()).compat( args );
public int newMain( String[] args )
int argc = args.length;
if ( argc == 0 )
usage();
return -1;
for ( int argn = 0; argn < argc; ++argn )
if ( argc > 1 )
if ( argn > 0 )
out.println( "" );
out.println( args[argn] + ":" );
list( args[argn] );
return 0;
private void usage()
err.println( "usage: " + progName + " URL ..." );
void list( String urlStr )
String base = abcd.Utils.baseUrlStr( urlStr );
Enumeration as;
try
as = new abcd.Spider( urlStr, err );
catch ( MalformedURLException e )
err.println( e );
return;
while ( as.hasMoreElements() )
URLConnection uc = (URLConnection) as.nextElement();
if ( uc == null )
continue;
URL thisUrl = uc.getURL();
String thisUrlStr = thisUrl.toExternalForm();
if ( thisUrlStr.startsWith( base ) )
thisUrlStr = thisUrlStr.substring( base.length() );
if ( thisUrlStr.length() == 0 )
thisUrlStr = ".";
String mimeType = uc.getContentType();
int len = uc.getContentLength();
long mod = uc.getLastModified();
Date modDate = new Date( mod );
String modDateStr = abcd.Utils.lsDateStr( modDate );
out.println(
abcd.Fmt.fmt( mimeType, 14, abcd.Fmt.LJ ) + " " +
abcd.Fmt.fmt( len, 8 ) + " " +
modDateStr + " " + thisUrlStr );
try
InputStream in = uc.getInputStream();
in.close();
catch ( IOException e ) {}
Regards,
TirumalaRao.
Developer Technical support,
sun MicroSystem, India.