readlogfileservlet.java

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package com.sun.j2ee.workflow.control.web;

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

/**
 * @author Jian (James) Cai
 */
public class ReadLogFileServlet extends HttpServlet {

	private ServletContext sc= null;
	private String full_fname= null;
	private File baseDir = null;
	private String str = null;
	private String file_name = null;

	public void init(ServletConfig config) throws ServletException{

		super.init(config);
		sc = config.getServletContext();
	}


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

			response.setContentType("text/html");
			PrintWriter pw = response.getWriter();
			//get the base directory for thr temp working files
			baseDir = (File)sc.getAttribute("javax.servlet.context.tempdir");

			//get the file name from the request parameter
			file_name=(String)request.getParameter("resultfile");
			full_fname = baseDir.toString()+baseDir.separator+file_name;
			try{
				BufferedReader bfr = new BufferedReader(new FileReader(full_fname));
				while((str = bfr.readLine()) != null ){
						pw.println(str);
						//		pw.println("<br>");

				}
				bfr.close();
				}catch(FileNotFoundException fnfe){ throw new ServletException(fnfe.toString());}
			catch(SecurityException se){throw new ServletException(se.toString()); }
    }

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

		  doGet(request,response);

    }


}