📄 jeevesupsince.java

📁 无线网络管理
💻 JAVA
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// NAME//      $RCSfile: JeevesUpSince.java,v $// DESCRIPTION//      [given below in javadoc format]// DELTA//      $Revision: 3.10 $// CREATED//      $Date: 2006/02/09 14:20:07 $// COPYRIGHT//      Westhawk Ltd// TO DO///* * Copyright (C) 1996 - 2006 by Westhawk Ltd * * Permission to use, copy, modify, and distribute this software * for any purpose and without fee is hereby granted, provided * that the above copyright notices appear in all copies and that * both the copyright notice and this permission notice appear in * supporting documentation. * This software is provided "as is" without express or implied * warranty. * author <a href="mailto:snmp@westhawk.co.uk">Tim Panton</a> */package uk.co.westhawk.servlet;import javax.servlet.*;import javax.servlet.http.*;import uk.co.westhawk.snmp.stack.*;import uk.co.westhawk.snmp.pdu.*;import java.util.*;import java.io.*;/** * <p> * When accessed, the JeevesUpSince servlet sends once a UpSincePdu request  * to the configured host to get the uptime of the host. * It will hold the connection until it has received the information. Then  * it will print the information to your webpage. * </p> * * <p> * It supports the GET action. The following parameter should be sent * in the URL:  * <ul> * <li>host - the hostname or IP address of the SNMP server, default is <em>your localhost</em></li> * </ul> * For example: * <pre> *     http:&lt;servlet URL&gt;?host=localhost * </pre> * </p> * * <p> * It will use port <em>161</em> and community name <em>public</em>. * </p> * * Some general information about <a * href="./Interfaces.html#_general_">servlets</a>. * * @see uk.co.westhawk.snmp.pdu.UpSincePdu * * @author <a href="mailto:snmp@westhawk.co.uk">Tim Panton</a> * @version $Revision: 3.10 $ $Date: 2006/02/09 14:20:07 $ */public class JeevesUpSince extends HttpServlet{    private static final String     version_id =        "@(#)$Id: JeevesUpSince.java,v 3.10 2006/02/09 14:20:07 birgit Exp $ Copyright Westhawk Ltd";    protected void doGet(HttpServletRequest req, HttpServletResponse res)        throws ServletException, IOException    {        final int port = 161;        SnmpContext context;        String reps = "is not replying to snmp";        String host = req.getParameter("host");        if (host == null)        {            host = req.getRemoteHost();            if (host == null)            {                host = "localhost";            }        }        try         {            context = new SnmpContext(host, port);            UpSincePdu since = new UpSincePdu(context, null);            if (since.waitForSelf())            {                Date when = since.getDate();                if (when != null)                {                    reps = "up since " + when.toString();                }                 else                 {                    reps = "no date";                }            }             else             {                reps = "waited in vain";            }        }        catch (java.io.IOException exc)        {            // should log this            reps = "IO exception: " + exc.getMessage();        }        catch (PduException exc)        {            reps = "Pdu exception: " + exc.getMessage();        }        try         {            res.setStatus(res.SC_OK);            res.setContentType("text/html");            PrintWriter out = res.getWriter();            out.println("<html><head><title>"+getServletInfo()+"</title>");            out.println("</head><body>");            out.println("<h2>"+getServletInfo()+"</h2>");            out.println("<p> Host "+host+" "+reps+"</p>");            out.println("</body></html>");            out.flush();            out.close();        }        catch (java.io.IOException exc)        {            // should log this            ;        }    }    public String getServletInfo()    {        return "Snmp uptime checker";    }}
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