org.eclipse.help.webapp/src/org/eclipse/help/internal/webapp/servlet/DynamicXHTMLFilter.java - platform/eclipse.platform.ua - Git at Google

 /*******************************************************************************
  * Copyright (c) 2006, 2010 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.help.internal.webapp.servlet;

 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.PrintWriter;
 import java.io.StringWriter;

 import javax.servlet.http.HttpServletRequest;

 import org.eclipse.help.internal.util.ProductPreferences;
 import org.eclipse.help.internal.webapp.WebappResources;
 import org.eclipse.help.internal.webapp.data.UrlUtil;
 import org.eclipse.help.internal.xhtml.DynamicXHTMLProcessor;
 import org.eclipse.help.webapp.IFilter;

 /*
  * A filter that performs any required XHTML processing, if the content is
  * XHTML. Using a servlet path of /rtopic (raw topic) will turn off this
  * filter.
  */
 public class DynamicXHTMLFilter implements IFilter {

 	private static final String ERROR_PAGE_PREFIX = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\">\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n</head>\n<body>"; //$NON-NLS-1$
 	private static final String ERROR_PAGE_SUFFIX = "</body>\n</html>"; //$NON-NLS-1$
 	private static final String CHARSET_UTF8 = "UTF-8"; //$NON-NLS-1$

 	/* (non-Javadoc)
 	 * @see org.eclipse.help.internal.webapp.servlet.IFilter#filter(javax.servlet.http.HttpServletRequest, java.io.OutputStream)
 	 */
 	@Override
 	public OutputStream filter(final HttpServletRequest req, final OutputStream out) {
 		final String uri = req.getRequestURI();
 		if (uri == null || !uri.endsWith("html") && !uri.endsWith("htm")) { //$NON-NLS-1$ //$NON-NLS-2$
 			return out;
 		}

 		/*
 		 * Remote help does all XHTML processing on the client side, so we
 		 * want raw XHTML topics from the remote help server.
 		 */
 		if ("/rtopic".equals(req.getServletPath())) { //$NON-NLS-1$
 			return out;
 		}

 		/*
 		 * Buffers the contents of the document until stream is closed, where
 		 * the document is processed then pushed through the filter.
 		 */
 		ByteArrayOutputStream out2 = new ByteArrayOutputStream() {
 			@Override
 			public void close() throws IOException {
 				super.close();
 				byte[] buf = toByteArray();
 				ByteArrayInputStream in = new ByteArrayInputStream(buf);

 				String locale = UrlUtil.getLocale(req, null);
 				String contextPath = req.getContextPath();
 				String servletPath = req.getServletPath();
 				String href = uri;
 				if (href.startsWith(contextPath)) {
 					href = href.substring(contextPath.length());
 				}
 				if (href.startsWith(servletPath)) {
 					href = href.substring(servletPath.length());
 				}

 				try {
 					boolean filter = ProductPreferences.useEnablementFilters();
 					InputStream in2 = DynamicXHTMLProcessor.process(href, in, locale, filter);
 					transferContent(in2, out);
 				}
 				catch (Throwable t) {
 					PrintWriter writer = new PrintWriter(new OutputStreamWriter(out, CHARSET_UTF8));
 					writer.println(ERROR_PAGE_PREFIX);
 					writer.println("<p>"); //$NON-NLS-1$
 					writer.println(WebappResources.getString("ProcessingError", req.getLocale())); //$NON-NLS-1$
 					writer.println("</p>"); //$NON-NLS-1$
 					writer.println("<pre>"); //$NON-NLS-1$

 					StringWriter w1 = new StringWriter();
 					PrintWriter w2 = new PrintWriter(w1);
 					t.printStackTrace(w2);

 					writer.println(UrlUtil.htmlEncode(w1.getBuffer().toString()));
 					writer.println("</pre>"); //$NON-NLS-1$
 					writer.println(ERROR_PAGE_SUFFIX);
 					writer.close();
 				}
 			}
 		};
 		return out2;
 	}

 	/*
 	 * Forward the contents of the input stream to the output stream.
 	 */
 	private void transferContent(InputStream in, OutputStream out)
 			throws IOException {
 		byte[] buffer = new byte[4096];
 		int len = 0;
 		while (true) {
 			len = in.read(buffer);
 			if (len == -1)
 				break;
 			out.write(buffer, 0, len);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2006, 2010 IBM Corporation and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.help.internal.webapp.servlet;

	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.IOException;
	import java.io.InputStream;
	import java.io.OutputStream;
	import java.io.OutputStreamWriter;
	import java.io.PrintWriter;
	import java.io.StringWriter;

	import javax.servlet.http.HttpServletRequest;

	import org.eclipse.help.internal.util.ProductPreferences;
	import org.eclipse.help.internal.webapp.WebappResources;
	import org.eclipse.help.internal.webapp.data.UrlUtil;
	import org.eclipse.help.internal.xhtml.DynamicXHTMLProcessor;
	import org.eclipse.help.webapp.IFilter;

	/*
	* A filter that performs any required XHTML processing, if the content is
	* XHTML. Using a servlet path of /rtopic (raw topic) will turn off this
	* filter.
	*/
	public class DynamicXHTMLFilter implements IFilter {

	private static final String ERROR_PAGE_PREFIX = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\">\n<html>\n<head>\n<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\n</head>\n<body>"; //$NON-NLS-1$
	private static final String ERROR_PAGE_SUFFIX = "</body>\n</html>"; //$NON-NLS-1$
	private static final String CHARSET_UTF8 = "UTF-8"; //$NON-NLS-1$

	/* (non-Javadoc)
	* @see org.eclipse.help.internal.webapp.servlet.IFilter#filter(javax.servlet.http.HttpServletRequest, java.io.OutputStream)
	*/
	@Override
	public OutputStream filter(final HttpServletRequest req, final OutputStream out) {
	final String uri = req.getRequestURI();
	if (uri == null \|\| !uri.endsWith("html") && !uri.endsWith("htm")) { //$NON-NLS-1$ //$NON-NLS-2$
	return out;
	}

	/*
	* Remote help does all XHTML processing on the client side, so we
	* want raw XHTML topics from the remote help server.
	*/
	if ("/rtopic".equals(req.getServletPath())) { //$NON-NLS-1$
	return out;
	}

	/*
	* Buffers the contents of the document until stream is closed, where
	* the document is processed then pushed through the filter.
	*/
	ByteArrayOutputStream out2 = new ByteArrayOutputStream() {
	@Override
	public void close() throws IOException {
	super.close();
	byte[] buf = toByteArray();
	ByteArrayInputStream in = new ByteArrayInputStream(buf);

	String locale = UrlUtil.getLocale(req, null);
	String contextPath = req.getContextPath();
	String servletPath = req.getServletPath();
	String href = uri;
	if (href.startsWith(contextPath)) {
	href = href.substring(contextPath.length());
	}
	if (href.startsWith(servletPath)) {
	href = href.substring(servletPath.length());
	}

	try {
	boolean filter = ProductPreferences.useEnablementFilters();
	InputStream in2 = DynamicXHTMLProcessor.process(href, in, locale, filter);
	transferContent(in2, out);
	}
	catch (Throwable t) {
	PrintWriter writer = new PrintWriter(new OutputStreamWriter(out, CHARSET_UTF8));
	writer.println(ERROR_PAGE_PREFIX);
	writer.println("<p>"); //$NON-NLS-1$
	writer.println(WebappResources.getString("ProcessingError", req.getLocale())); //$NON-NLS-1$
	writer.println("</p>"); //$NON-NLS-1$
	writer.println("<pre>"); //$NON-NLS-1$

	StringWriter w1 = new StringWriter();
	PrintWriter w2 = new PrintWriter(w1);
	t.printStackTrace(w2);

	writer.println(UrlUtil.htmlEncode(w1.getBuffer().toString()));
	writer.println("</pre>"); //$NON-NLS-1$
	writer.println(ERROR_PAGE_SUFFIX);
	writer.close();
	}
	}
	};
	return out2;
	}

	/*
	* Forward the contents of the input stream to the output stream.
	*/
	private void transferContent(InputStream in, OutputStream out)
	throws IOException {
	byte[] buffer = new byte[4096];
	int len = 0;
	while (true) {
	len = in.read(buffer);
	if (len == -1)
	break;
	out.write(buffer, 0, len);
	}
	}
	}