HTML5Tidy.java
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	• tstarling
	Aug 6 2015, 11:27 AM

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HTML5Tidy.java
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	package org.wikimedia.html5tidy;

	import javax.servlet.*;
	import java.io.IOException;
	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;

	import java.util.Enumeration;

	import java.nio.charset.Charset;

	import org.xml.sax.ContentHandler;
	import org.xml.sax.InputSource;
	import org.xml.sax.SAXException;

	import nu.validator.encoding.Encoding;
	import nu.validator.htmlparser.common.XmlViolationPolicy;
	import nu.validator.htmlparser.sax.HtmlParser;
	import nu.validator.htmlparser.sax.HtmlSerializer;

	public class HTML5Tidy extends GenericServlet {
	public void service(ServletRequest req, ServletResponse res)
	throws ServletException, IOException
	{
	req.setCharacterEncoding("UTF-8");
	String text = req.getParameter("text");
	if (text == null) {
	throw new ServletException("The text parameter must be given");
	}
	Charset utf8;
	try {
	utf8 = Charset.forName("UTF-8");
	} catch (IllegalArgumentException e) {
	throw new ServletException("No UTF-8", e);
	}
	byte[] input = req.getParameter("text").getBytes(utf8);
	ByteArrayOutputStream sink = new ByteArrayOutputStream();
	ContentHandler serializer = new HtmlSerializer(sink);
	HtmlParser parser = new HtmlParser(XmlViolationPolicy.ALLOW);
	parser.setContentHandler(serializer);
	try {
	parser.setProperty("http://xml.org/sax/properties/lexical-handler",
	serializer);
	InputSource source = new InputSource(new ByteArrayInputStream(input));
	source.setEncoding("UTF-8");
	parser.parse(source);
	} catch (SAXException e) {
	throw new ServletException("Error parsing HTML", e);
	}

	// HtmlSerializer writes UTF-8 by default
	res.setContentType("text/html;charset=UTF-8");

	res.getOutputStream().write(sink.toByteArray());
	}
	};

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