Java tutorial
//The MIT License // //Copyright (c) 2009 nodchip // //Permission is hereby granted, free of charge, to any person obtaining a copy //of this software and associated documentation files (the "Software"), to deal //in the Software without restriction, including without limitation the rights //to use, copy, modify, merge, publish, distribute, sublicense, and/or sell //copies of the Software, and to permit persons to whom the Software is //furnished to do so, subject to the following conditions: // //The above copyright notice and this permission notice shall be included in //all copies or substantial portions of the Software. // //THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR //IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, //FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE //AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER //LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, //OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN //THE SOFTWARE. package tv.dyndns.kishibe.qmaclone.server; import java.io.EOFException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.List; import java.util.TimeZone; import java.util.concurrent.ExecutionException; import java.util.concurrent.TimeUnit; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import tv.dyndns.kishibe.qmaclone.client.packet.PacketProblem; import tv.dyndns.kishibe.qmaclone.server.database.Database; import tv.dyndns.kishibe.qmaclone.server.database.DatabaseException; import com.google.common.base.Preconditions; import com.google.common.cache.CacheBuilder; import com.google.common.cache.CacheLoader; import com.google.common.cache.LoadingCache; import com.google.common.io.ByteStreams; import com.google.gwt.safehtml.shared.SafeHtmlUtils; import com.google.inject.Inject; import com.google.inject.Singleton; @SuppressWarnings("serial") @Singleton public class ServiceTopPage extends HttpServlet { private static final Logger logger = Logger.getLogger(ServiceTopPage.class.getName()); private static final String PREFIX = "<html>\n<head>\n<title>QMAClone by nodchip (?)</title>\n<meta http-equiv='content-type' content='text/html; charset=UTF-8'>\n<link rel='stylesheet' type='text/css' href='QMAClone.css'>\n<link rel='alternate' type='application/rss+xml'\n\ttitle='QMAClone RSS' href='rss.xml' />\n<link rel='alternate' type='application/atom+xml'\n\ttitle='QMAClone Atom' href='rss.xml?rssVersion=atom03' />\n<meta name='google-site-verification'\n\tcontent='mDQyFPpWAu6I_S35Y2Ud7ptxAZtpKGldvi8IN7f3ibY' />\n<script type='text/javascript'>\n\twindow.___gcfg = {\n\t\tlang : 'ja'\n\t};\n</script>\n<script type='text/javascript'>\n\tdocument.onkeydown = function(e) {\n\t\t// Backspace\n\t\tif (e && e.keyCode == 8) {\n\t\t\telement = e.target || e.srcElement;\n\t\t\tif (element.tagName && element.tagName.toLowerCase() != 'input'\n\t\t\t\t\t&& element.tagName.toLowerCase() != 'textarea') {\n\t\t\t\t// Google Chrome & FireFox\n\t\t\t\te.preventDefault();\n\t\t\t\te.stopPropagation();\n\t\t\t\treturn false;\n\t\t\t}\n\t\t} else if (EVENT && EVENT.keyCode == 8 && EVENT.srcElement.type == null) {\n\t\t\t// IE\n\t\t\tevent.returnValue = false;\n\t\t\tevent.cancelBubble = true;\n\t\t\treturn false;\n\t\t}\n\t}\n</script>\n</head>\n\n<body>\n\t<iframe src='javascript:''' id='__gwt_historyFrame'\n\t\tstyle='width: 0; height: 0; border: 0'></iframe>\n\n\t<script type='text/javascript'\n\t\tsrc='tv.dyndns.kishibe.qmaclone.QMAClone/tv.dyndns.kishibe.qmaclone.QMAClone.nocache.js'></script>\n\n\t<h1 id='title' align='right'>QMAClone by nodchip(?)</h1>\n\n\t<div id='slot' style='width: 100%; height: 100%;'></div>\n\t<div id='sound' style='width: 0px; height: 0px'></div>\n\t<div id='position_selecter'></div>\n\t<div id='click_canvas'></div>\n\n\t<div style='visibility: hidden'></div>\n\n\t<script type='text/javascript'>\n\t\tvar gaJsHost = (('https:' == document.location.protocol) ? 'https://ssl.'\n\t\t\t\t: 'http://www.');\n\t\tdocument\n\t\t\t\t.write(unescape('%3Cscript src=''\n\t\t\t\t\t\t+ gaJsHost\n\t\t\t\t\t\t+ 'google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E'));\n\t</script>\n\t<script type='text/javascript'>\n\t\ttry {\n\t\t\tvar pageTracker = _gat._getTracker('UA-12390713-3');\n\t\t\tpageTracker._trackPageview();\n\t\t} catch (err) {\n\t\t}\n\t</script>\n\n<div style='visibility: hidden'>\n"; private static final String SURFIX = "</div>\n\n</body>\n</html>\n"; private static final Object STATIC_KEY = new Object(); private final Database database; private final LoadingCache<Object, byte[]> content = CacheBuilder.newBuilder().concurrencyLevel(1) .expireAfterWrite(1, TimeUnit.DAYS).build(new CacheLoader<Object, byte[]>() { @Override public byte[] load(Object arg0) throws Exception { return createHtml(); } }); private long lastLastModified; @Inject public ServiceTopPage(Database database) { this.database = Preconditions.checkNotNull(database); } @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { resp.setContentType("text/html;charset=utf-8"); resp.setHeader("Cache-Control", "max-age=86400"); resp.setHeader("Expires", getRFC1123NextDay()); try (InputStream inputStream = req.getInputStream(); OutputStream outputStream = resp.getOutputStream()) { try { ByteStreams.skipFully(inputStream, Long.MAX_VALUE); } catch (EOFException e) { // Do nothing. } outputStream.write(content.get(STATIC_KEY)); } catch (ExecutionException e) { logger.log(Level.SEVERE, "HTML???????", e); throw new IOException(e); } } private byte[] createHtml() throws DatabaseException, UnsupportedEncodingException { lastLastModified = System.currentTimeMillis(); StringBuilder b = new StringBuilder(); b.append(PREFIX); StringBuilder sb = new StringBuilder("MMO"); List<PacketProblem> adsenseProblems = database.getAdsenseProblems(sb.toString()); for (PacketProblem problem : adsenseProblems) { String sentence = problem.sentence; String note = problem.note; String[] choices = problem.choices; String[] answers = problem.answers; b.append("<div>\n"); b.append("\t<div>").append(SafeHtmlUtils.htmlEscape(sentence)).append("</div>\n"); b.append("\t<div>"); for (String choice : choices) { if (choice != null && !choice.isEmpty()) { b.append("<span>").append(SafeHtmlUtils.htmlEscape(choice)).append("</span>"); } } for (String answer : answers) { if (answer != null && !answer.isEmpty()) { b.append("<span>").append(SafeHtmlUtils.htmlEscape(answer)).append("</span>"); } } b.append("</div>\n"); if (note != null && !note.isEmpty()) { b.append("\t<div>").append(SafeHtmlUtils.htmlEscape(note)).append("</div>\n"); } b.append("</div>\n"); } b.append(SURFIX); return b.toString().getBytes("utf-8"); } @Override protected long getLastModified(HttpServletRequest req) { return lastLastModified; } public String getRFC1123NextDay() { SimpleDateFormat rfc1123DateFormat = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss zzz", java.util.Locale.US); rfc1123DateFormat.setTimeZone(TimeZone.getTimeZone("GMT")); Calendar calendar = Calendar.getInstance(); calendar.add(Calendar.DAY_OF_MONTH, 1); Date current = calendar.getTime(); return rfc1123DateFormat.format(current); } }