runtime/org.argeo.slc.server/src/main/java/org/argeo/slc/web/ajaxplorer/svn/SvnDownloadAction.java

   1 package org.argeo.slc.web.ajaxplorer.svn;
   2
   3 import javax.servlet.ServletOutputStream;
   4 import javax.servlet.http.HttpServletRequest;
   5 import javax.servlet.http.HttpServletResponse;
   6
   7 import org.apache.commons.io.IOUtils;
   8 import org.argeo.slc.web.ajaxplorer.AjxpAction;
   9 import org.argeo.slc.web.ajaxplorer.AjxpAnswer;
  10 import org.argeo.slc.web.ajaxplorer.AjxpDriverException;
  11 import org.argeo.slc.web.ajaxplorer.file.FileDownloadAction;
  12 import org.tmatesoft.svn.core.io.SVNRepository;
  13
  14 public class SvnDownloadAction implements AjxpAction<SvnDriver> {
  15
  16         public AjxpAnswer execute(SvnDriver driver, HttpServletRequest request) {
  17                 String path = request.getParameter("file");
  18                 if (path.charAt(path.length() - 1) == '/') {
  19                         // probably a directory
  20                         return AjxpAnswer.DO_NOTHING;
  21                 }
  22
  23                 String revStr = request.getParameter("rev");
  24                 Long rev = Long.parseLong(revStr);
  25                 return new SvnDownloadAnswer(driver, path, rev);
  26         }
  27
  28         public class SvnDownloadAnswer implements AjxpAnswer {
  29                 private final SvnDriver driver;
  30                 private final String path;
  31                 private final Long rev;
  32
  33                 public SvnDownloadAnswer(SvnDriver driver, String path, Long rev) {
  34                         this.driver = driver;
  35                         this.path = path;
  36                         this.rev = rev;
  37                 }
  38
  39                 public void updateResponse(HttpServletResponse response) {
  40                         ServletOutputStream out = null;
  41                         try {
  42                                 FileDownloadAction.setDefaultDownloadHeaders(response,
  43                                                 getFileName(), null);
  44                                 response.setHeader("AjaXplorer-SvnFileName", getFileName());
  45
  46                                 SVNRepository repository = driver.getRepository();
  47                                 out = response.getOutputStream();
  48                                 repository.getFile(path, rev, null, out);
  49                         } catch (Exception e) {
  50                                 throw new AjxpDriverException("Cannot download revision " + rev
  51                                                 + " of path " + path, e);
  52                         } finally {
  53                                 IOUtils.closeQuietly(out);
  54                         }
  55                 }
  56
  57                 protected String getFileName() {
  58                         int lastIndexSlash = path.lastIndexOf('/');
  59                         final String origFileName;
  60                         if (lastIndexSlash != -1) {
  61                                 origFileName = path.substring(lastIndexSlash + 1);
  62                         } else {
  63                                 origFileName = path;
  64                         }
  65
  66                         int lastIndexPoint = origFileName.lastIndexOf('.');
  67                         String prefix = origFileName.substring(0, lastIndexPoint);
  68                         String ext = origFileName.substring(lastIndexPoint);
  69                         return prefix + "-" + rev + ext;
  70                 }
  71         }
  72 }