Mercurial Hosting > luan
annotate src/goodjava/webserver/handlers/FileHandler.java @ 1829:0eb615de1f80
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 22 Sep 2024 20:05:54 -0600 |
parents | fa066aaa068c |
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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.IOException; |
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6 import java.text.DateFormat; |
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7 import java.text.SimpleDateFormat; |
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8 import java.text.ParseException; |
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9 import java.util.Date; |
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10 import java.util.TimeZone; |
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11 import goodjava.webserver.Handler; |
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12 import goodjava.webserver.Request; |
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13 import goodjava.webserver.Response; |
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14 import goodjava.webserver.Status; |
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15 |
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16 |
1167 | 17 public class FileHandler implements Handler { |
18 final File dir; | |
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19 |
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20 public FileHandler() { |
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21 this("."); |
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22 } |
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23 |
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24 public FileHandler(String pathname) { |
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25 this(new File(pathname)); |
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26 } |
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27 |
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28 public FileHandler(File dir) { |
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29 if( !dir.isDirectory() ) |
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30 throw new RuntimeException("must be a directory"); |
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31 this.dir = dir; |
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32 } |
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33 |
1168 | 34 File file(Request request) { |
35 return new File(dir,request.path); | |
36 } | |
37 | |
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38 public Response handle(Request request) { |
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39 try { |
1168 | 40 File file = file(request); |
41 if( file.isFile() ) { | |
42 Response response = new Response(); | |
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43 |
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44 DateFormat fmt = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z"); |
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45 fmt.setTimeZone(TimeZone.getTimeZone("GMT")); |
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46 String lastModified = fmt.format(new Date(file.lastModified())); |
1607 | 47 String ifMod = (String)request.headers.get("If-Modified-Since"); |
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48 if( ifMod != null ) { |
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49 try { |
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50 Date ifModDate = fmt.parse(ifMod); |
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51 if( ifModDate != null && ifModDate.getTime() >= fmt.parse(lastModified).getTime() ) { |
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52 response.status = Status.NOT_MODIFIED; |
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53 return response; |
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54 } |
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55 |
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56 } catch(ParseException e) {} |
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57 } |
1607 | 58 response.headers.put("Last-Modified",lastModified); |
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59 |
1168 | 60 response.body = new Response.Body( file.length(), new FileInputStream(file) ); |
61 return response; | |
62 } | |
63 return null; | |
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64 } catch(IOException e) { |
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65 throw new RuntimeException(e); |
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66 } |
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67 } |
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68 } |