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annotate src/goodjava/webserver/handlers/DirHandler.java @ 1602:55d7b60c074d

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add DirHandler to WebHandler
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 09 Apr 2021 23:46:12 -0600
parents 27efb1fcbcb5
children fa066aaa068c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package goodjava.webserver.handlers;
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2
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3 import java.io.File;
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4 import java.io.FileInputStream;
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5 import java.io.Writer;
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6 import java.io.OutputStreamWriter;
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7 import java.io.IOException;
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8 import java.text.DateFormat;
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9 import java.text.SimpleDateFormat;
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10 import java.util.Arrays;
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11 import java.util.Comparator;
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12 import java.util.Date;
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13 import goodjava.webserver.Handler;
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14 import goodjava.webserver.Request;
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15 import goodjava.webserver.Response;
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16 import goodjava.webserver.ResponseOutputStream;
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18
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19 public final class DirHandler implements Handler {
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20 private final FileHandler fileHandler;
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21
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22 public DirHandler(FileHandler fileHandler) {
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23 this.fileHandler = fileHandler;
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24 }
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25
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26 private static final Comparator<File> sorter = new Comparator<File>() {
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27 public int compare(File f1, File f2) {
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28 boolean f1IsDir = f1.isDirectory();
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29 boolean f2IsDir = f2.isDirectory();
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30 if( f1IsDir && !f2IsDir )
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31 return -1;
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32 if( !f1IsDir && f2IsDir )
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33 return 1;
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34 return f1.getName().compareTo(f2.getName());
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35 }
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36 };
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37
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38 public Response handle(Request request) {
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39 try {
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40 File file = fileHandler.file(request);
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41 String path = request.path;
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42 if( path.endsWith("/") && file.isDirectory() ) {
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43 DateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss zzz");
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44 Response response = new Response();
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45 response.headers.put( "content-type", "text/html; charset=utf-8" );
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46 Writer writer = new OutputStreamWriter( new ResponseOutputStream(response) );
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47 writer.write( "<!doctype html>\n<html>\n" );
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48 writer.write( "\t<head>\n" );
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49 writer.write( "\t\t<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n" );
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50 writer.write( "\t\t<style>\n" );
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51 writer.write( "\t\t\ttd {padding: 2px 8px}\n" );
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52 writer.write( "\t\t\ta {text-decoration: none}\n" );
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53 writer.write( "\t\t\ta:hover {text-decoration: underline}\n" );
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54 writer.write( "\t\t</style>\n" );
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55 writer.write( "\t</head>\n" );
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56 writer.write( "\t<body>\n" );
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57 writer.write( "\t\t<h1>Directory: "+path+"</h1>\n" );
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58 writer.write( "\t\t<table border=0>\n" );
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59 if( !path.equals("/") ) {
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60 writer.write( "\t\t\t<tr>\n" );
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61 writer.write( "\t\t\t\t<td><a href='..'>../</a></td>\n" );
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62 writer.write( "\t\t\t</tr>\n" );
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63 }
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64 File[] a = file.listFiles();
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65 Arrays.sort(a,sorter);
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66 for( File child : a ) {
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67 String name = child.getName();
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68 boolean isDir = child.isDirectory();
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69 if( isDir )
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70 name += '/';
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71 writer.write( "\t\t\t<tr>\n" );
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72 writer.write( "\t\t\t\t<td><a href='"+name+"'>"+name+"</a></td>\n" );
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73 writer.write( "\t\t\t\t<td>"+fmt.format(new Date(child.lastModified()))+"</td>\n" );
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74 if( !isDir )
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75 writer.write( "\t\t\t\t<td align=right>"+child.length()+" bytes</td>\n" );
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76 writer.write( "\t\t\t</tr>\n" );
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77 }
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78 writer.write( "\t\t</table>\n" );
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79 writer.write( "\t</body>\n" );
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80 writer.write( "</html>\n" );
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81 writer.close();
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82 return response;
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83 }
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84 return null;
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85 } catch(IOException e) {
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86 throw new RuntimeException(e);
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87 }
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88 }
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89 }