base/runtime/org.argeo.eclipse.ui.rap/src/main/java/org/argeo/eclipse/ui/specific/FileHandler.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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.eclipse.ui.specific;
  17
  18 import org.apache.commons.logging.Log;
  19 import org.apache.commons.logging.LogFactory;
  20 import org.eclipse.rap.rwt.RWT;
  21 import org.eclipse.rap.rwt.client.service.UrlLauncher;
  22 import org.eclipse.rap.rwt.service.ServiceHandler;
  23
  24 /**
  25  * RAP SPECIFIC handler to enable the opening of a download dialog box triggered
  26  * by whatever action in the UI
  27  *
  28  * Manages the registration of the effective DownloadServiceHandler at
  29  * instantiation time.
  30  *
  31  * Manages the process of forwarding the request to the handler at runtime to
  32  * open the dialog box encodedURL
  33  */
  34 public class FileHandler {
  35         public final static String DOWNLOAD_SERVICE_NAME = "argeo.rap.download.service";
  36         private final static Log log = LogFactory.getLog(FileHandler.class);
  37
  38         public FileHandler(FileProvider provider) {
  39                 ServiceHandler handler = new DownloadServiceHandler(provider);
  40                 RWT.getServiceManager().registerServiceHandler(DOWNLOAD_SERVICE_NAME,
  41                                 handler);
  42         }
  43
  44         public void openFile(String fileName, String fileId) {
  45                 try {
  46                         String downloadUrl = RWT.getServiceManager().getServiceHandlerUrl(
  47                                         DOWNLOAD_SERVICE_NAME)
  48                                         + createParamUrl(fileName, fileId);
  49                         if (log.isTraceEnabled())
  50                                 log.debug("URL : " + downloadUrl);
  51                         UrlLauncher launcher = RWT.getClient()
  52                                         .getService(UrlLauncher.class);
  53                         launcher.openURL(downloadUrl);
  54                 } catch (Exception e) {
  55                         e.printStackTrace();
  56                 }
  57                 // These lines are useless in the current use case but might be
  58                 // necessary with new browsers. Stored here for memo
  59                 // response.setContentType("application/force-download");
  60                 // response.setHeader("Content-Disposition", contentDisposition);
  61                 // response.setHeader("Content-Transfer-Encoding", "binary");
  62                 // response.setHeader("Pragma", "no-cache");
  63                 // response.setHeader("Cache-Control", "no-cache, must-revalidate");
  64         }
  65
  66         private String createParamUrl(String filename, String fileId) {
  67                 StringBuilder url = new StringBuilder();
  68                 url.append("&filename=");
  69                 url.append(filename);
  70                 url.append("&fileid=");
  71                 url.append(fileId);
  72                 return url.toString();
  73         }
  74 }