📄 log4jrequesthandler.java
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package com.psibt.framework.net;import java.io.*;import java.net.*;import java.util.*;import org.apache.log4j.*;/** * This class implements a RequestHandler for log4j configuration. It serves the "/log4j/" path * in the PluggableHTTPServer. If this path is requested a list of all current log4j categories * with their current priorities is created. All priority settings can be changed by the user * and can be submitted and taken over. * * @author <a HREF="mailto:V.Mentzner@psi-bt.de">Volker Mentzner</a> */public class Log4jRequestHandler extends RootRequestHandler { private Priority[] prios = Priority.getAllPossiblePriorities(); /** * Creates a new Log4jRequestHandler object */ public Log4jRequestHandler() { this.setTitle("log4j"); this.setDescription("log4j configuration"); this.setHandledPath("/log4j/"); } /** * Handles the given request and writes the reply to the given out-stream. * * @param request - client browser request * @param out - Out stream for sending data to client browser * @return if the request was handled by this handler : true, else : false */ public boolean handleRequest(String request, Writer out) { String path = ""; String query = null; String name; try { // check request url URL url = new URL("http://localhost"+request); path = url.getPath(); query = url.getQuery(); if (path.startsWith(this.getHandledPath()) == false) { return false; } out.write("HTTP/1.0 200 OK\r\n"); out.write("Content-type: text/html\r\n\r\n"); out.write("<HTML><HEAD><TITLE>" + this.getTitle() + "</TITLE></HEAD>\r\n"); out.write("<BODY><H1>log4j</H1>\r\n"); out.write(this.getDescription() + "<br><br>\r\n"); // handle a request with query if ((query != null) && (query.length() >= 0)) { StringTokenizer st = new StringTokenizer(query, "&"); String cmd; String catname; String catval; int idx; while (st.hasMoreTokens()) { cmd = st.nextToken(); idx = cmd.indexOf("="); catname = cmd.substring(0, idx); catval = cmd.substring(idx+1, cmd.length()); if (catname.equalsIgnoreCase("root")) Category.getRoot().setPriority(Priority.toPriority(catval)); else Category.getInstance(catname).setPriority(Priority.toPriority(catval)); } } // output category information in a form with a simple table out.write("<form name=\"Formular\" ACTION=\""+this.getHandledPath()+"\" METHOD=\"PUT\">"); out.write("<table cellpadding=4>\r\n"); out.write(" <tr>\r\n"); out.write(" <td><b>Category</b></td>\r\n"); out.write(" <td><b>Priority</b></td>\r\n"); out.write(" <td><b>Appender</b></td>\r\n"); out.write(" </tr>\r\n"); // output for root category Category cat = Category.getRoot(); out.write(" <tr><td>root</td>\r\n"); out.write(" <td>\r\n"); out.write(" <select size=1 name=\""+ cat.getName() +"\">"); for (int i = 0; i < prios.length; i++) { if (cat.getChainedPriority().toString().equals(prios[i].toString())) out.write("<option selected>"+prios[i].toString()); else out.write("<option>"+prios[i].toString()); } out.write("</select>\r\n"); out.write(" </td>\r\n"); out.write(" <td>\r\n"); for (Enumeration apds = cat.getAllAppenders(); apds.hasMoreElements();) { Appender apd = (Appender)apds.nextElement(); name = apd.getName(); if (name == null) name = "<i>(no name)</i>"; out.write(name); if (apd instanceof AppenderSkeleton) { try { AppenderSkeleton apskel = (AppenderSkeleton)apd; out.write(" [" + apskel.getThreshold().toString() + "]"); } catch (Exception ex) { } } if (apds.hasMoreElements()) out.write(", "); } out.write(" </td>\r\n"); out.write(" </tr>\r\n"); // output for all other categories for (Enumeration en = Category.getCurrentCategories(); en.hasMoreElements();) { cat = (Category)en.nextElement(); out.write(" <tr>\r\n"); out.write(" <td>" + cat.getName() + "</td>\r\n"); out.write(" <td>\r\n"); out.write(" <select size=1 name=\""+ cat.getName() +"\">"); for (int i = 0; i < prios.length; i++) { if (cat.getChainedPriority().toString().equals(prios[i].toString())) out.write("<option selected>"+prios[i].toString()); else out.write("<option>"+prios[i].toString()); } out.write("</select>\r\n"); out.write(" </td>\r\n"); out.write(" <td>\r\n"); for (Enumeration apds = cat.getAllAppenders(); apds.hasMoreElements();) { Appender apd = (Appender)apds.nextElement(); name = apd.getName(); if (name == null) name = "<i>(no name)</i>"; out.write(name); if (apd instanceof AppenderSkeleton) { try { AppenderSkeleton apskel = (AppenderSkeleton)apd; out.write(" [" + apskel.getThreshold().toString() + "]"); } catch (Exception ex) { } } if (apds.hasMoreElements()) out.write(", "); } out.write(" </td>\r\n"); out.write(" </tr>\r\n"); } out.write("</table>\r\n"); out.write("<input type=submit value=\"Submit\">"); out.write("</form>"); out.write("</BODY></HTML>\r\n"); out.flush(); return true; } catch (Exception ex) { return false; } }}⌨️ 快捷键说明
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