ProjectDownloadController


1   package org.openi.web.controller.admin;
2   
3   import org.apache.log4j.Logger;
4   
5   import org.openi.project.ProjectContext;
6   
7   import org.springframework.web.servlet.ModelAndView;
8   import org.springframework.web.servlet.mvc.AbstractController;
9   
10  import java.io.IOException  ;
11  import java.util.zip.ZipOutputStream  ;
12  
13  import javax.activation.FileTypeMap  ;
14  
15  import javax.servlet.http.HttpServletRequest  ;
16  import javax.servlet.http.HttpServletResponse  ;
17  
18  
19  /**
20   * Zips up the project contents and sends to the user:
21   * <li>Wraps the servlet output stream in a zip output stream.
22   * <li>Uses the current projectContext (from session) and calls zipProjectContents, sending the
23   * results directly to the servlet output stream
24   *
25   * @see org.openi.project.ProjectContext#zipProjectContents(ZipOutputStream)
26   *
27   */
28  public class ProjectDownloadController extends AbstractController {
29      private static Logger logger = Logger.getLogger(ProjectDownloadController.class);
30  
31      public ProjectDownloadController() {
32          super();
33      }
34  
35      protected ModelAndView handleRequestInternal(HttpServletRequest   request,
36          HttpServletResponse   response) throws Exception   {
37          logger.debug("zipping up project, sending to servlet output stream");
38  
39          ProjectContext context = (ProjectContext) request.getSession()
40                                                           .getAttribute("projectContext");
41  
42          String   filename = context.getProject().getProjectId() + ".zip";
43  
44          // need to set response headers so browser handles properly:
45          // use jaf filetype map to get content type 
46          // (might be overkill, but at least the type will be std): 
47          FileTypeMap   map = FileTypeMap.getDefaultFileTypeMap();
48          response.setContentType(map.getContentType(filename));
49          response.setHeader("Pragma", "no-cache");
50          response.setHeader("Content-Disposition",
51                  "attachement; filename=\"" + filename + "\"");
52  
53          ZipOutputStream   zos = new ZipOutputStream  (response.getOutputStream());
54          try {
55              context.zipProjectContents(zos);
56          } catch(IOException   ex) {
57              logger.error("An exception occured while zipping project content", ex);
58          }
59          zos.close();
60          zos = null;
61  
62          return null;
63      }
64  }
65
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