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

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.web.ajaxplorer.svn;
  17
  18 import javax.servlet.ServletOutputStream;
  19 import javax.servlet.http.HttpServletRequest;
  20 import javax.servlet.http.HttpServletResponse;
  21
  22 import org.apache.commons.io.IOUtils;
  23 import org.argeo.slc.web.ajaxplorer.AjxpAction;
  24 import org.argeo.slc.web.ajaxplorer.AjxpAnswer;
  25 import org.argeo.slc.web.ajaxplorer.AjxpDriverException;
  26 import org.argeo.slc.web.ajaxplorer.file.FileDownloadAction;
  27 import org.tmatesoft.svn.core.io.SVNRepository;
  28
  29 public class SvnDownloadAction implements AjxpAction<SvnDriver> {
  30
  31         public AjxpAnswer execute(SvnDriver driver, HttpServletRequest request) {
  32                 String path = request.getParameter("file");
  33                 if (path.charAt(path.length() - 1) == '/') {
  34                         // probably a directory
  35                         return AjxpAnswer.DO_NOTHING;
  36                 }
  37
  38                 String revStr = request.getParameter("rev");
  39                 Long rev = Long.parseLong(revStr);
  40                 return new SvnDownloadAnswer(driver, path, rev);
  41         }
  42
  43         public class SvnDownloadAnswer implements AjxpAnswer {
  44                 private final SvnDriver driver;
  45                 private final String path;
  46                 private final Long rev;
  47
  48                 public SvnDownloadAnswer(SvnDriver driver, String path, Long rev) {
  49                         this.driver = driver;
  50                         this.path = path;
  51                         this.rev = rev;
  52                 }
  53
  54                 public void updateResponse(HttpServletResponse response) {
  55                         ServletOutputStream out = null;
  56                         try {
  57                                 FileDownloadAction.setDefaultDownloadHeaders(response,
  58                                                 getFileName(), null);
  59                                 response.setHeader("AjaXplorer-SvnFileName", getFileName());
  60
  61                                 SVNRepository repository = driver.getRepository();
  62                                 out = response.getOutputStream();
  63                                 repository.getFile(path, rev, null, out);
  64                         } catch (Exception e) {
  65                                 throw new AjxpDriverException("Cannot download revision " + rev
  66                                                 + " of path " + path, e);
  67                         } finally {
  68                                 IOUtils.closeQuietly(out);
  69                         }
  70                 }
  71
  72                 protected String getFileName() {
  73                         int lastIndexSlash = path.lastIndexOf('/');
  74                         final String origFileName;
  75                         if (lastIndexSlash != -1) {
  76                                 origFileName = path.substring(lastIndexSlash + 1);
  77                         } else {
  78                                 origFileName = path;
  79                         }
  80
  81                         int lastIndexPoint = origFileName.lastIndexOf('.');
  82                         String prefix = origFileName.substring(0, lastIndexPoint);
  83                         String ext = origFileName.substring(lastIndexPoint);
  84                         return prefix + "-" + rev + ext;
  85                 }
  86         }
  87 }