root / src / gr / ebs / gss / server / rest / GroupsHandler.java @ f9bd859c
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/*
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* Copyright 2008, 2009 Electronic Business Systems Ltd.
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*
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* This file is part of GSS.
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*
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* GSS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GSS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GSS. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gr.ebs.gss.server.rest; |
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import gr.ebs.gss.client.exceptions.DuplicateNameException; |
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import gr.ebs.gss.client.exceptions.InsufficientPermissionsException; |
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import gr.ebs.gss.client.exceptions.ObjectNotFoundException; |
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import gr.ebs.gss.client.exceptions.RpcException; |
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import gr.ebs.gss.server.domain.User; |
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import gr.ebs.gss.server.domain.dto.GroupDTO; |
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import gr.ebs.gss.server.domain.dto.UserDTO; |
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import gr.ebs.gss.server.ejb.TransactionHelper; |
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import java.io.IOException; |
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import java.net.URLDecoder; |
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import java.net.URLEncoder; |
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import java.util.List; |
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import java.util.concurrent.Callable; |
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import javax.servlet.http.HttpServletRequest; |
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import javax.servlet.http.HttpServletResponse; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import org.json.JSONArray; |
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import org.json.JSONException; |
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import org.json.JSONObject; |
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/**
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* A class that handles operations on the 'groups' namespace.
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*
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* @author past
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*/
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public class GroupsHandler extends RequestHandler { |
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/**
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* The logger.
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*/
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private static Log logger = LogFactory.getLog(GroupsHandler.class); |
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/**
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* Serve the groups namespace for the user.
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*
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* @param req The servlet request we are processing
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* @param resp The servlet response we are processing
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* @throws IOException if an input/output error occurs
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*/
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void serveGroups(HttpServletRequest req, HttpServletResponse resp) throws IOException { |
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String parentUrl = getContextPath(req, true); |
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String path = getInnerPath(req, PATH_GROUPS);
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if (path.equals("")) |
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path = "/";
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User user = getUser(req); |
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User owner = getOwner(req); |
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if (!owner.equals(user)) {
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resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED); |
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return;
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} |
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if (path.equals("/")) |
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// Request to serve all groups
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try {
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List<GroupDTO> groups = getService().getGroups(owner.getId());
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JSONArray json = new JSONArray();
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for (GroupDTO group: groups) {
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JSONObject j = new JSONObject();
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j.put("name", group.getName()).
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put("uri", parentUrl + URLEncoder.encode(group.getName(),"UTF-8")); |
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json.put(j); |
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} |
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sendJson(req, resp, json.toString()); |
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} catch (ObjectNotFoundException e) {
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logger.error("User not found", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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return;
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} catch (RpcException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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return;
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} catch (JSONException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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return;
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} |
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else {
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// Chop any trailing slash
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path = path.endsWith("/")? path.substring(0, path.length()-1): path; |
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// Chop any leading slash
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path = path.startsWith("/")? path.substring(1): path; |
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int slash = path.indexOf('/'); |
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try {
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if (slash != -1) { |
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// Request to serve group member
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if (logger.isDebugEnabled())
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logger.debug("Serving member " + path.substring(slash + 1) + |
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" from group " + path.substring(0, slash)); |
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GroupDTO group = getService().getGroup(owner.getId(), URLDecoder.decode(path.substring(0, slash),"UTF-8")); |
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for (UserDTO u: group.getMembers())
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if (u.getUsername().equals(path.substring(slash + 1))) { |
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// Build the proper parent URL
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String pathInfo = req.getPathInfo();
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parentUrl = parentUrl.replaceFirst(pathInfo, "");
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JSONObject json = new JSONObject();
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json.put("username", u.getUsername()).put("name", u.getName()). |
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put("home", parentUrl + u.getUsername());
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sendJson(req, resp, json.toString()); |
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} |
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} else {
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// Request to serve group
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if (logger.isDebugEnabled())
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logger.debug("Serving group " + path);
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GroupDTO group = getService().getGroup(owner.getId(), URLDecoder.decode(path,"UTF-8")); |
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JSONArray json = new JSONArray();
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for (UserDTO u: group.getMembers())
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json.put(parentUrl + u.getUsername()); |
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sendJson(req, resp, json.toString()); |
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} |
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} catch (ObjectNotFoundException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_NOT_FOUND, e.getMessage()); |
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return;
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} catch (RpcException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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return;
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} catch (JSONException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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return;
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} |
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} |
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// Workaround for IE's broken caching behavior.
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resp.setHeader("Expires", "-1"); |
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} |
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/**
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* Handle POST requests in the groups namespace.
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*
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* @param req The servlet request we are processing
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* @param resp The servlet response we are processing
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* @throws IOException if an input/output error occurs
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*/
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void postGroup(HttpServletRequest req, HttpServletResponse resp) throws IOException { |
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// Identify the requested resource path
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String path = getInnerPath(req, PATH_GROUPS);
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if (path.equals("")) |
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path = "/";
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try {
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User user = getUser(req); |
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final User owner = getOwner(req);
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if (!owner.equals(user))
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throw new InsufficientPermissionsException("User " + user.getUsername() |
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+ " does not have permission to modify the groups owned by "
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+ owner.getUsername()); |
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if (path.equals("/")) { |
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// Request to add group
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final String group = req.getParameter(GROUP_PARAMETER); |
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if (!isValidResourceName(group)) {
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resp.sendError(HttpServletResponse.SC_BAD_REQUEST); |
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return;
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} |
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if (logger.isDebugEnabled())
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logger.debug("Adding group " + group);
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new TransactionHelper<Void>().tryExecute(new Callable<Void>() { |
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@Override
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public Void call() throws Exception { |
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getService().createGroup(owner.getId(), group); |
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return null; |
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} |
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}); |
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resp.setStatus(HttpServletResponse.SC_CREATED); |
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} else {
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// Request to add group member
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String username = req.getParameter(USERNAME_PARAMETER);
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if (!isValidResourceName(username)) {
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resp.sendError(HttpServletResponse.SC_BAD_REQUEST); |
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return;
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} |
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// Chop any trailing slash
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path = path.endsWith("/")? path.substring(0, path.length()-1): path; |
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// Chop any leading slash
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path = path.startsWith("/")? path.substring(1): path; |
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if (logger.isDebugEnabled())
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logger.debug("Adding member " + username +
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" to group " + path);
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final GroupDTO group = getService().getGroup(owner.getId(), URLDecoder.decode(path,"UTF-8")); |
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final User member = getService().findUser(username);
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if (member == null) { |
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resp.sendError(HttpServletResponse.SC_NOT_FOUND, "User " + username + " not found"); |
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return;
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} |
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new TransactionHelper<Void>().tryExecute(new Callable<Void>() { |
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@Override
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public Void call() throws Exception { |
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getService().addUserToGroup(owner.getId(), group.getId(), member.getId()); |
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return null; |
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} |
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}); |
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resp.setStatus(HttpServletResponse.SC_CREATED); |
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} |
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// Workaround for IE's broken caching behavior.
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resp.setHeader("Expires", "-1"); |
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} catch (ObjectNotFoundException e) {
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resp.sendError(HttpServletResponse.SC_NOT_FOUND, e.getMessage()); |
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} catch (IllegalArgumentException e) { |
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resp.sendError(HttpServletResponse.SC_BAD_REQUEST, e.getMessage()); |
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} catch (DuplicateNameException e) {
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resp.sendError(HttpServletResponse.SC_CONFLICT, e.getMessage()); |
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} catch (RpcException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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} catch (InsufficientPermissionsException e) {
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resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, e.getMessage()); |
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} catch (Exception e) { |
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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} |
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} |
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/**
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* Handle DELETE requests in the groups namespace.
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*
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* @param req The servlet request we are processing
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* @param resp The servlet response we are processing
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* @throws IOException if an input/output error occurs
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*/
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void deleteGroup(HttpServletRequest req, HttpServletResponse resp) throws IOException { |
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String path = getInnerPath(req, PATH_GROUPS);
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if (path.equals("")) |
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path = "/";
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if (path.equals("/")) |
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resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, METHOD_GET + ", " + METHOD_POST);
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else {
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// Chop any trailing slash
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path = path.endsWith("/")? path.substring(0, path.length()-1): path; |
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// Chop any leading slash
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path = path.startsWith("/")? path.substring(1): path; |
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int slash = path.indexOf('/'); |
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try {
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User user = getUser(req); |
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final User owner = getOwner(req);
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if (!owner.equals(user))
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throw new InsufficientPermissionsException("User " + user.getUsername() |
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+ " does not have permission to modify the groups owned by "
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+ owner.getUsername()); |
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if (slash != -1) { |
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// Request to delete group member
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if (logger.isDebugEnabled())
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logger.debug("Removing member " + path.substring(slash + 1) + |
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" from group " + path.substring(0, slash)); |
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final GroupDTO group = getService().getGroup(owner.getId(), URLDecoder.decode(path.substring(0, slash),"UTF-8")); |
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for (final UserDTO u: group.getMembers()) |
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if (u.getUsername().equals(path.substring(slash + 1))) |
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new TransactionHelper<Void>().tryExecute(new Callable<Void>() { |
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@Override
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public Void call() throws Exception { |
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getService().removeMemberFromGroup(owner.getId(), group.getId(), u.getId()); |
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return null; |
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} |
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}); |
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} else {
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if (logger.isDebugEnabled())
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logger.debug("Removing group " + path);
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final GroupDTO group = getService().getGroup(owner.getId(), URLDecoder.decode(path,"UTF-8")); |
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new TransactionHelper<Void>().tryExecute(new Callable<Void>() { |
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@Override
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public Void call() throws Exception { |
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getService().deleteGroup(owner.getId(), group.getId()); |
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return null; |
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} |
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}); |
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} |
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resp.setStatus(HttpServletResponse.SC_NO_CONTENT); |
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// Workaround for IE's broken caching behavior.
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resp.setHeader("Expires", "-1"); |
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} catch (RpcException e) {
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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} catch (ObjectNotFoundException e) {
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resp.sendError(HttpServletResponse.SC_NOT_FOUND, e.getMessage()); |
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} catch (InsufficientPermissionsException e) {
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resp.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, e.getMessage()); |
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} catch (Exception e) { |
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logger.error("", e);
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resp.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR); |
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} |
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} |
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} |
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} |