code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/server/rest/SharedHandler.java

   1 /*
   2  * Copyright 2008, 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.server.rest;
  20
  21 import gr.ebs.gss.client.exceptions.InsufficientPermissionsException;
  22 import gr.ebs.gss.client.exceptions.ObjectNotFoundException;
  23 import gr.ebs.gss.client.exceptions.RpcException;
  24 import gr.ebs.gss.server.domain.User;
  25 import gr.ebs.gss.server.domain.dto.FileHeaderDTO;
  26 import gr.ebs.gss.server.domain.dto.FolderDTO;
  27
  28 import java.io.IOException;
  29 import java.net.URLEncoder;
  30 import java.util.ArrayList;
  31 import java.util.List;
  32
  33 import javax.servlet.http.HttpServletRequest;
  34 import javax.servlet.http.HttpServletResponse;
  35
  36 import org.apache.commons.logging.Log;
  37 import org.apache.commons.logging.LogFactory;
  38 import org.json.JSONException;
  39 import org.json.JSONObject;
  40
  41
  42 /**
  43  * A class that handles operations on the 'shared' namespace.
  44  *
  45  * @author past
  46  */
  47 public class SharedHandler extends RequestHandler {
  48         /**
  49          * The logger.
  50          */
  51         private static Log logger = LogFactory.getLog(SharedHandler.class);
  52
  53         /**
  54      * Serve the 'shared' namespace for the user.
  55      *
  56      * @param req The servlet request we are processing
  57      * @param resp The servlet response we are processing
  58      * @throws IOException if an input/output error occurs
  59          */
  60         void serveShared(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  61         String path = getInnerPath(req, PATH_SHARED);
  62                 if (path.equals(""))
  63                         path = "/";
  64
  65         if (path.equals("/"))
  66                         try {
  67                         User user = getUser(req);
  68                         User owner = getOwner(req);
  69                         if (!owner.equals(user))
  70                                 throw new InsufficientPermissionsException("User " + user.getUsername()
  71                                                         + " does not have permission to view the resources shared by "
  72                                                         + owner.getUsername());
  73                         JSONObject json = new JSONObject();
  74
  75                                 List<JSONObject> subfolders = new ArrayList<JSONObject>();
  76                 List<FolderDTO> folders = getService().getSharedRootFolders(owner.getId());
  77                 for (FolderDTO f: folders) {
  78                                 JSONObject j = new JSONObject();
  79                                 j.put("name", f.getName()).
  80                                         put("uri", getApiRoot() + f.getURI());
  81                                 if (f.getParent() != null)
  82                                         j.put("parent", getApiRoot() + f.getParent().getURI());
  83                                 subfolders.add(j);
  84                         }
  85                         json.put("folders", subfolders);
  86
  87                 List<FileHeaderDTO> fileHeaders = getService().getSharedFilesNotInSharedFolders(owner.getId());
  88                 List<JSONObject> files = new ArrayList<JSONObject>();
  89                 for (FileHeaderDTO f: fileHeaders) {
  90                         JSONObject j = new JSONObject();
  91                                 j.put("name", f.getName()).
  92                                         put("owner", f.getOwner().getUsername()).
  93                                         put("deleted", f.isDeleted()).
  94                                         put("version", f.getVersion()).
  95                                         put("size", f.getFileSize()).
  96                                         put("content", f.getMimeType()).
  97                                         put("path", f.getFolder().getPath()).
  98                                         put("creationDate", f.getAuditInfo().getCreationDate().getTime()).
  99                                         put("uri", getApiRoot() + f.getURI());
 100                                 JSONObject jf = new JSONObject();
 101                                 jf.put("uri", getApiRoot() + f.getFolder().getURI()).
 102                                                 put("name", URLEncoder.encode(f.getFolder().getName(),"UTF-8"));
 103                                 j.put("folder", jf);
 104                                 files.add(j);
 105                 }
 106                 json.put("files", files);
 107
 108                 sendJson(req, resp, json.toString());
 109                 // Workaround for IE's broken caching behavior.
 110                         resp.setHeader("Expires", "-1");
 111                 } catch (ObjectNotFoundException e) {
 112                         logger.error("User not found", e);
 113                         resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 114                 } catch (RpcException e) {
 115                         logger.error("", e);
 116                         resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 117                         } catch (JSONException e) {
 118                                 logger.error("", e);
 119                                 resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
 120                         } catch (InsufficientPermissionsException e) {
 121                                 resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, e.getMessage());
 122                         }
 123                 else
 124                         resp.sendError(HttpServletResponse.SC_NOT_FOUND);
 125         }
 126
 127 }