headersservlet.java

来自「一个简单的java邮件系统」· Java 代码 · 共 142 行

JAVA
142 行
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/*
 * @(#)HeadersServlet.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 java.io.PrintWriter;

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 HeadersServlet extends HttpServlet {

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

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		PrintWriter out = null;
		try {
			request.setCharacterEncoding(Context.clntCp);
			response.setContentType("text/html; charset=" + Context.clntCp);			
			out = response.getWriter();
			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);
			    
			  java.util.Enumeration msgHdrs = null;
			  if(partno == -1) {
				  msgHdrs = myContext.getMessage(msgno, msguid, null).headers;
			  } else {		  	  
				  msgHdrs = myContext.getMessage(msgno, msguid, null).getRfc822Part(partno).headers;
			  }
			  
			  if(msgHdrs == null) {
				  Context.forward(this, request, response, "/list");
			    return;
			  }
			
			
			// Main page
		    StringBuffer sb = new StringBuffer();
		    sb.append("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\r\n");
		    sb.append("<html>\r\n");
		    sb.append("<head>\r\n");
		    sb.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=").append(Context.clntCp).append("\">\r\n");
//		    sb.append("<meta http-equiv=\"Content-Language\" content=\"ru-RU\">\r\n");
		    sb.append("<meta HTTP-EQUIV=\"PRAGMA\" content=\"NO-CACHE\">\r\n");
		    sb.append("<title>\r\n");
		    sb.append(myContext.getI18nString("_str_headers_title")).append("\r\n");
		    sb.append("</title>\r\n");
		    sb.append("<link rel=\"stylesheet\" type=\"text/css\" href=\"./oliva.css\">\r\n");
		    sb.append("</head>\r\n");		    		    		    
		    sb.append("<body link=\"#000033\" alink=\"#000033\" vlink=\"#000033\">\r\n");
		    out.print(sb.toString());
		    		    		    
		    // Main pane
			sb = new StringBuffer();
			sb.append("<table border=\"0\" cellspacing=\"1\" cellpadding=\"2\" class=\"basic\" width=\"100%\">");
			while (msgHdrs.hasMoreElements()) {
				javax.mail.Header hdr = (javax.mail.Header) msgHdrs.nextElement();
				sb.append("<tr>\r\n");
				sb.append("<td width=\"110\" valign=\"top\" class=\"hdr\" bgcolor=\"#ccccff\"><font size=\"2\">")
					.append(hdr.getName()).append(":</font></td>");
				sb.append("<td width=\"600\" class=\"data\" bgcolor=\"#eeeeff\"><font size=\"2\">");
				String hdrVal = hdr.getValue();
				if (hdrVal == null)
					hdrVal = "";
				sb.append(hdrVal.replaceAll("<", "&lt;")
						.replaceAll(">", "&gt;"));
				sb.append("</font>&nbsp;</td>");
				sb.append("</tr>");
			}
			sb.append("</table>");
		    		    
		    WebPage webPage = new WebPage();
		    WebPane webPane = new WebPane();
			webPane = new WebPane();
		    webPane.setColor(WebPane.COLOR_9999CC);
//		    webPane.setHeight("200");
		    webPane.setContent(sb.toString());
		    webPage.addPane(webPane);		    
		    
		    webPage.show(out);
		    
		    sb = new StringBuffer();
		    sb.append("</body>\r\n");
		    sb.append("</html>\r\n");
		    out.print(sb.toString());
		    out.flush();
		    out.close();	    
		} 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);
	}
}

headersservlet.java - 源码说明

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