Java tutorial
/* ***** BEGIN LICENSE BLOCK ***** * * Copyright (C) 2011-2014 Linagora * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version, provided you comply * with the Additional Terms applicable for OBM connector by Linagora * pursuant to Section 7 of the GNU Affero General Public License, * subsections (b), (c), and (e), pursuant to which you must notably (i) retain * the Message sent thanks to OBM, Free Communication by Linagora? * signature notice appended to any and all outbound messages * (notably e-mail and meeting requests), (ii) retain all hypertext links between * OBM and obm.org, as well as between Linagora and linagora.com, and (iii) refrain * from infringing Linagora intellectual property rights over its trademarks * and commercial brands. Other Additional Terms apply, * see <http://www.linagora.com/licenses/> for more details. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License * for more details. * * You should have received a copy of the GNU Affero General Public License * and its applicable Additional Terms for OBM along with this program. If not, * see <http://www.gnu.org/licenses/> for the GNU Affero General Public License version 3 * and <http://www.linagora.com/licenses/> for the Additional Terms applicable to * OBM connectors. * * ***** END LICENSE BLOCK ***** */ package org.obm.push.protocol.data; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.apache.commons.lang.StringEscapeUtils; /** * Convert text/plain mail body to HTML. The HTML version should be used for * display & rich formatting. */ public class HTMLBodyFormatter { private static String PATTERN_EMAIL = "[a-zA-Z_0-9\\-.]+@[a-zA-Z_0-9\\-.]+\\.[a-z]+"; private static String PATTERN_URL = "(((http://)|(https://)|(w{3}.))" + "+[a-zA-Z_0-9\\-]+(\\.\\w[a-zA-Z_0-9\\-]+)" + "+(/[#&;\\n\\-=?:|,()@\\+\\%/\\.\\w]+)?+(:[0-9]*+)?)"; public HTMLBodyFormatter() { super(); } public String convert(String plain) { StringBuilder sb = new StringBuilder(); sb.append("<html><body>"); String escaped = StringEscapeUtils.escapeHtml(plain); escaped = escaped.replaceAll("\r\n", "<br>"); sb.append(escaped); sb.append("</body></html>"); Pattern p = Pattern.compile(PATTERN_URL + "|" + PATTERN_EMAIL); Matcher m = p.matcher(sb); StringBuffer res = parseUrl(m); if (res.toString().length() > 0) { return res.toString(); } else { return sb.toString(); } } public StringBuffer parseUrl(Matcher m) { StringBuffer result = new StringBuffer(); Pattern pEmail = Pattern.compile(PATTERN_EMAIL); Pattern pUrl = Pattern.compile(PATTERN_URL); while (m.find()) { String href = m.group(); Matcher mEmail = pEmail.matcher(href); Matcher mUrl = pUrl.matcher(href); if (mUrl.find()) { if (href.startsWith("http")) { m.appendReplacement(result, "<a href=\"" + href + "\" target=\"_blank\">" + href + "</a>"); } else { m.appendReplacement(result, "<a href=\"http://" + href + "\" target=\"_blank\">" + href + "</a>"); } } else if (mEmail.find()) { m.appendReplacement(result, "<a href=mailto:" + href + ">" + href + "</a>"); } } m.appendTail(result); return result; } }