authentificateservlet.java.svn-base

远程学生作业提交系统,所用技术JSP,Servelet,Ajax,Web Services,MySql

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.sixtwenty.servlet;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.ArrayList;

import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import org.apache.axis.encoding.XMLType;

import javax.xml.namespace.QName;
import javax.xml.rpc.ParameterMode;

import com.sixtwenty.Projects;
import com.sixtwenty.Submissions;
import com.sixtwenty.Submit;
import com.sixtwenty.SubmitServiceLocator;

/**
 * This servlet is used by authenticate user. 
 * @author grp-e
 *
 */
public class AuthentificateServlet extends HttpServlet
{
	//String endpoint = "http://172.23.96.22:8180/axis/services/submit";
	String endpoint = "http://localhost:8080/axis/services/submit";


	/**
	 * Handles the get request
	 * @param request
	 * @param response
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException
	{
		doPost(request, response);
	}

	/**
	 * Handles the post request
	 * @param request
	 * @param response
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
	throws IOException, ServletException {
		response.setContentType("text/html");
		PrintWriter out = response.getWriter ();

		try {
			// Get password and login
			String username = new String(request.getParameter("username"));	//The username
			String password = new String(request.getParameter("password"));	//The password

			//Instantiate the SubmitServiceLocator
			SubmitServiceLocator ssl = new SubmitServiceLocator();
			Submit submit = ssl.getsubmit();

			//call to remote method authenticateUser
			Boolean ret = submit.authenticateUser(username, password);

			//Check if the user is authorised user
			if(ret.booleanValue()) {

				//call to remote method accessLevel
				int accessLevel = submit.accessLevel(username);
				System.out.println("accessLevel :" +accessLevel);

				//access level for staff as 2
				if(accessLevel == 2) {
					System.out.println("Staff Login");

					//Forwarding to next jsp
					String nextJSP = "/jsp/staffpage.jsp";
					RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);

					//setting the values in session
					request.getSession().setAttribute("username", username);
					request.getSession().setAttribute("password", password);
					dispatcher.forward(request, response);
				}

				//access level for student as 1
				if(accessLevel == 1) {
					System.out.println("Student Login");

					//Forwarding to next jsp
					String nextJSP = "/jsp/studentpage.jsp";
					RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);

					//setting the username in session
					request.getSession().setAttribute("username", username);
					dispatcher.forward(request, response);


				}
				//access level for admin as 3
				if(accessLevel == 3) {
					System.out.println("Admin Login");

					//Forwarding to next jsp
					String nextJSP = "/jsp/adminpage.jsp";
					RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);

					//setting the username in session
					request.getSession().setAttribute("username", username);
					dispatcher.forward(request, response);


				}

			} else {
				System.out.println("User unknown");

				//If the user is unauthorised, the system directs to error page 
				String nextJSP = "/jsp/errorpage.jsp";
				RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(nextJSP);

				//setting the username in session
				request.getSession().setAttribute("username", username);
				dispatcher.forward(request, response);
			}

		} catch (Exception e) {
			out.println(e.toString());
		}
	}
}