001/* 002 Licensed to the Apache Software Foundation (ASF) under one 003 or more contributor license agreements. See the NOTICE file 004 distributed with this work for additional information 005 regarding copyright ownership. The ASF licenses this file 006 to you under the Apache License, Version 2.0 (the 007 "License"); you may not use this file except in compliance 008 with the License. You may obtain a copy of the License at 009 010 http://www.apache.org/licenses/LICENSE-2.0 011 012 Unless required by applicable law or agreed to in writing, 013 software distributed under the License is distributed on an 014 "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 KIND, either express or implied. See the License for the 016 specific language governing permissions and limitations 017 under the License. 018 */ 019package org.apache.wiki.tags; 020 021import java.io.IOException; 022import java.security.Principal; 023import java.util.regex.Pattern; 024 025import javax.servlet.http.HttpServletRequest; 026 027import org.apache.wiki.WikiEngine; 028import org.apache.wiki.WikiSession; 029import org.apache.wiki.i18n.InternationalizationManager; 030import org.apache.wiki.preferences.Preferences; 031import org.apache.wiki.util.TextUtil; 032 033/** 034 * Returns the current user name, or empty, if the user has not been 035 * validated. 036 * 037 * @since 2.0 038 */ 039public class UserNameTag extends WikiTagBase 040{ 041 private static final long serialVersionUID = 0L; 042 043 private static String notStartWithBlankOrColon = "^[^( |:)]"; 044 045 private static String noColons = "[^:]*"; 046 047 private static final Pattern VALID_USER_NAME_PATTERN = Pattern.compile(notStartWithBlankOrColon + noColons); 048 049 public final int doWikiStartTag() throws IOException 050 { 051 WikiEngine engine = this.m_wikiContext.getEngine(); 052 WikiSession wikiSession = WikiSession.getWikiSession(engine, (HttpServletRequest) pageContext.getRequest()); 053 Principal user = wikiSession.getUserPrincipal(); 054 055 if (user != null) 056 { 057 if (VALID_USER_NAME_PATTERN.matcher(user.getName()).matches()) 058 { 059 pageContext.getOut().print(TextUtil.replaceEntities(user.getName())); 060 } 061 else 062 { 063 pageContext.getOut().print( Preferences.getBundle( m_wikiContext, InternationalizationManager.CORE_BUNDLE ) 064 .getString( "security.user.fullname.invalid" ) ); 065 } 066 } 067 068 return SKIP_BODY; 069 } 070}