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view src/goodjava/webserver/handlers/DirHandler.java @ 1785:39d2be9784ab

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minor
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 10 Dec 2023 21:13:30 -0700
parents d88fb2eb15aa
children
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line source

package goodjava.webserver.handlers;

import java.io.File;
import java.io.FileInputStream;
import java.io.Writer;
import java.io.OutputStreamWriter;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Date;
import goodjava.webserver.Handler;
import goodjava.webserver.Request;
import goodjava.webserver.Response;
import goodjava.webserver.ResponseOutputStream;


public final class DirHandler implements Handler {
	private final FileHandler fileHandler;

	public DirHandler(FileHandler fileHandler) {
		this.fileHandler = fileHandler;
	}

	private static final Comparator<File> sorter = new Comparator<File>() {
		public int compare(File f1, File f2) {
			boolean f1IsDir = f1.isDirectory();
			boolean f2IsDir = f2.isDirectory();
			if( f1IsDir && !f2IsDir )
				return -1;
			if( !f1IsDir && f2IsDir )
				return 1;
			return f1.getName().compareTo(f2.getName());
		}
	};

	public Response handle(Request request) {
		try {
			File file = fileHandler.file(request);
			String path = request.path;
			if( path.endsWith("/") && file.isDirectory() ) {
				DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");
				Response response = new Response();
				response.headers.put( "Content-Type", "text/html; charset=utf-8" );
				Writer writer = new OutputStreamWriter( new ResponseOutputStream(response) );
				writer.write( "<!doctype html>\n<html>\n" );
				writer.write( "\t<head>\n" );
				writer.write( "\t\t<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n" );
				writer.write( "\t\t<meta name=\"robots\" content=\"noindex,nofollow\">\n" );
				writer.write( "\t\t<style>\n" );
				writer.write( "\t\t\ttd {padding: 2px 8px}\n" );
				writer.write( "\t\t\ta {text-decoration: none}\n" );
				writer.write( "\t\t\ta:hover {text-decoration: underline}\n" );
				writer.write( "\t\t</style>\n" );
				writer.write( "\t</head>\n" );
				writer.write( "\t<body>\n" );
				writer.write( "\t\t<h1>Directory: "+path+"</h1>\n" );
				writer.write( "\t\t<table border=0>\n" );
				if( !path.equals("/") ) {
					writer.write( "\t\t\t<tr>\n" );
					writer.write( "\t\t\t\t<td><a href='..'>../</a></td>\n" );
					writer.write( "\t\t\t</tr>\n" );
				}
				File[] a = file.listFiles();
				Arrays.sort(a,sorter);
				for( File child : a ) {
					String name = child.getName();
					boolean isDir = child.isDirectory();
					if( isDir )
						name += '/';
					writer.write( "\t\t\t<tr>\n" );
					writer.write( "\t\t\t\t<td><a href='"+name+"'>"+name+"</a></td>\n" );
					writer.write( "\t\t\t\t<td>"+fmt.format(new Date(child.lastModified()))+"</td>\n" );
					if( !isDir )
						writer.write( "\t\t\t\t<td align=right>"+child.length()+" bytes</td>\n" );
					writer.write( "\t\t\t</tr>\n" );
				}
				writer.write( "\t\t</table>\n" );
				writer.write( "\t</body>\n" );
				writer.write( "</html>\n" );
				writer.close();
				return response;
			}
			return null;
		} catch(IOException e) {
			throw new RuntimeException(e);
		}
	}
}