sourceservlet.java

一个简单的java邮件系统

/*
 * @(#)SourceServlet.java
 *
 * Copyright (C) 2006 Sergey Bredikhin
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package olivax.webmail;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class SourceServlet extends HttpServlet {

	static final long serialVersionUID = 1675075694621323211L;	
	
	public SourceServlet() {
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		try {
			request.setCharacterEncoding(Context.clntCp);
			response.setContentType("text/html; charset=" + Context.clntCp);			
			HttpSession session = request.getSession();
			Context myContext = (Context) session.getAttribute("myContext");
			if(myContext == null) {
				myContext = new Context();
				session.setAttribute("myContext", myContext);
			}			
			if(!myContext.isLoggedIn()) {
				Context.forward(this, request, response, "/logon"); 
			}
			myContext.setNoCache(response);

			// Get parameters
			int msgno = Integer.parseInt(request.getParameter("msgno"));
			String msguid = request.getParameter("msguid");
			if (msguid == null)
				msguid = "";
			String strPartNo = request.getParameter("partno");
			int partno = -1;
			if (strPartNo != null)
				partno = Integer.parseInt(strPartNo);

			javax.servlet.ServletOutputStream os = response.getOutputStream();
			response.setHeader("Content-Type", "text/plain");
			response.setHeader("Content-Disposition", "filename=msg"
					+ String.valueOf(msgno) + ".txt");
			if (partno == -1) {
				myContext.mailBean.getMessageSource(msgno, msguid, os);
			} else {
				myContext.getMessage(msgno, msguid, null).getRfc822Part(partno).apiMessage
						.writeTo(os);
				os.flush();
			}  
		} catch (Exception e) {
			try {
				Context.sendErrorRedirect(this, request, response, "/error", e);
			} catch (Exception exc) {				
				exc.printStackTrace();				
			}
		}		
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}
}