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1 /*
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2 Copyright (c) 2008 Franklin Schmidt <fschmidt@gmail.com>
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3
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4 Permission is hereby granted, free of charge, to any person obtaining a copy
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5 of this software and associated documentation files (the "Software"), to deal
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6 in the Software without restriction, including without limitation the rights
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7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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8 copies of the Software, and to permit persons to whom the Software is
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9 furnished to do so, subject to the following conditions:
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10
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11 The above copyright notice and this permission notice shall be included in
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12 all copies or substantial portions of the Software.
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13
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14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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20 THE SOFTWARE.
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21 */
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22
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23 package fschmidt.util.servlet;
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24
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25 import java.io.*;
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26 import java.net.*;
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27 import javax.servlet.*;
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28 import javax.servlet.http.*;
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29 import fschmidt.util.java.*;
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30
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31
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32 public class ResourceServlet extends HttpServlet {
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33 private static final long started = System.currentTimeMillis()/1000*1000;
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34 private String welcomeFile;
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35
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36 public void init(ServletConfig config)
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37 throws ServletException
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38 {
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39 super.init(config);
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40 welcomeFile = config.getInitParameter("welcome-file");
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41 }
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42
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43 protected void service(HttpServletRequest request,final HttpServletResponse response)
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44 throws ServletException, IOException
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45 {
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46 ServletContext context = getServletConfig().getServletContext();
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47 String path = request.getServletPath();
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48 if( path.endsWith("/") ) {
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49 context.getRequestDispatcher( path + welcomeFile ).forward(request,response);
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50 return;
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51 }
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52 if( started <= request.getDateHeader("If-Modified-Since") ) {
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53 response.sendError(HttpServletResponse.SC_NOT_MODIFIED);
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54 return;
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55 }
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56 response.setDateHeader("Last-Modified",started);
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57 String type = context.getMimeType(path);
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58 if( type != null )
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59 response.setHeader("Content-Type",type);
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60 String resource = context.getRealPath(path).replace(File.separatorChar,'/');
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61 if( resource.startsWith("/") )
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62 resource = resource.substring(1);
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63 URL url = IoUtils.getUrlFromResource(resource);
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64 if( url==null ) {
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65 response.sendError(HttpServletResponse.SC_NOT_FOUND);
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66 return;
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67 }
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68 ServletOutputStream out = response.getOutputStream();
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69 InputStream in = url.openStream();
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70 IoUtils.copyAll(in,out);
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71 in.close();
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72 }
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73
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74 }
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