📄 userdialogrequesthandler.java
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/** * Title: PSI Java Framework: UserDialogRequestHandler<p> * Copyright: PSI-BT AG<p> * History: * Date Author What's new * 16.04.2001 VMentzner Created */package com.psibt.framework.net;/** * This class implements a RequestHandler for the path "/userdialog/" in the PluggableHTTPServer. * A simple input form is presented in the browser where you can enter a message. This message will be sent * to the PluggableHTTPServer and shown in a JOptionPane MessageDialog. * * @author <a HREF="mailto:V.Mentzner@psi-bt.de">Volker Mentzner</a> */public class UserDialogRequestHandler extends RootRequestHandler { private Component parentComponent; /** * Creates a new UserDialogRequestHandler object */ public UserDialogRequestHandler() { this(null); } /** * Creates a new UserDialogRequestHandler object with a parentComponent reference */ public UserDialogRequestHandler(Component parentComponent) { this.setTitle("user dialog"); this.setDescription("show user dialog"); this.setHandledPath("/userdialog/"); this.parentComponent = parentComponent; } /** * 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; try { 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>" + this.getDescription() + "</H1>\r\n"); if ((query != null) && (query.length() >= 0)) { int idx = query.indexOf("="); String message = query.substring(idx+1, query.length()); // replace '+' by space message = message.replace('+', ' '); // replace hex strings starting with '%' by their values idx = message.indexOf("%"); while (idx >= 0) { String sl = message.substring(0, idx); String sm = message.substring(idx+1, idx+3); String sr = message.substring(idx+3, message.length()); try { int i = Integer.parseInt(sm, 16); sm = String.valueOf((char)i); } catch (Exception ex) { sm = ""; } message = sl + sm + sr; idx = message.indexOf("%"); } // show message in a new thread if ((message != null) && (message.length() > 0)) { Thread t = new Thread(new DialogThread(parentComponent, message)); t.start(); } } out.write("<form name=\"Formular\" ACTION=\""+this.getHandledPath()+"+\" METHOD=\"PUT\">"); out.write("<table>\r\n"); out.write(" <tr><td>Send message to user</td></tr>\r\n"); out.write(" <tr><td><textarea name=\"message\" rows=10 cols=50></textarea></td></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; } } /** * Internal class to start the user dialog in a new thread. This makes the RequestHandler return * immediatly */ class DialogThread implements Runnable { private Component parentComponent; private String message; public DialogThread(Component parentComponent, String message) { this.parentComponent = parentComponent; this.message = message; } public void run() { JOptionPane.showMessageDialog(parentComponent, message); } }}⌨️ 快捷键说明
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