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Thomas De Schampheleire

lib: sanitize HTML for all types of README rendering, not only markdown

The repository summary page will display a rendered version of the
repository 'readme' based on its file extension. In commit 5746cc3b3fa5,
the rendered output was already sanitized when the input was markdown.
However, also readmes written in other formats, like ReStructuredText (RST)
or plain text could have content that we want sanitized.

Therefore, move the sanitizing one level up so it covers all renderers, for
now and the future.

This fixes an XSS issue when a repository readme contains javascript code,
which would be executed when the repository summary page is visited by a
user.

Reported by Bob Hogg <wombat@rwhogg.site> (thanks!).

<!DOCTYPE html>
<html lang="en">
<!--[if IE]>
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<![endif]-->
<head>
	<meta charset="utf-8" /><title>Mergely License</title>
	<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
	<meta name="description" content="Mergely license requirements for open source software and commercial software" />
	<meta name="keywords" content="diff,merge,compare,compare documents,js diff,javascript diff,comparison,online diff,difference,file,text,unix,patch,algorithm,saas,longest common subsequence,diff online" />
	<meta name="author" content="Jamie Peabody" />
	<meta name="author" content="Jamie Peabody" />
	<link rel="shortcut icon" href="http://www.mergely.com/favicon.ico" />
    <link href='http://fonts.googleapis.com/css?family=Noto+Sans:400,700' rel='stylesheet' type='text/css' />
    <link href='fonts/berlin-sans-fb-demi.css' rel='stylesheet' type='text/css' />
    <link href='style/mergely.css' rel='stylesheet' type='text/css' />
    <link href='/Mergely/lib/mergely.css' rel='stylesheet' type='text/css' />
	<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
	<script type="text/javascript">
		var _gaq = _gaq || [];
		_gaq.push(['_setAccount', 'UA-85576-5']);
		_gaq.push(['_trackPageview']);
		(function() {
			var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
			ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
			var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
		})();
	</script>
</head>
<body>
    <div id="page">
        <div id="content">
            <div id="header">
                <h1><span>Mergely License - Closed Distribution License</span></h1>
                <div id="options">
                    <a href="/editor" class="button">Online Diff</a>
                    <a href="/download" class="button">Download</a>
                </div>
                <nav>
                    <ul>
                        <li><a href="/">Home</a></li>                        <li><a href="/doc">Documentation</a></li>                        <li><a href="/about">About Mergely</a></li>                        <li><a href="/license">License</a></li>                        <li><a href="#footer">Contact</a></li>                    </ul>
                </nav>
            </div>

            <div id="main">
				<h1>Mergely License</h1>
				<p>
					All Mergely code is Copyright 2014 by Jamie Peabody.
					Mergely is distributed under the 
					<a href="http://www.gnu.org/licenses/gpl.html">GPL</a>, 
					<a href="http://www.gnu.org/licenses/lgpl.html">LGPL</a>
					and 
					<a href="http://www.mozilla.org/MPL/MPL-1.1.html">MPL</a> open source licenses. 
					This triple <b>copyleft</b> licensing model avoids incompatibility with other open 
					source licenses. These open source licenses are specially indicated for:
					<ul>
						<li>Integrating Mergely into Open Source software;</li>
						<li>Personal and educational use of Mergely;</li>
						<li>
							Integrating Mergely in commercial software, taking care of satisfying 
							the Open Source licenses terms, while not able or interested on supporting 
							Mergely and its development.
						</li>
					</ul>
				</p>
				<h2>Mergely Commercial License - Closed Distribution License - CDL</h2>
				<p>
					You may contact <a href="mailto:jamie.peabody@gmail.com">Jamie Peabody</a> to enquire about
					obtaining a CDL license.
				</p>
				<p>
					This license offers a very flexible way to integrate Mergely in your commercial 
					application. These are the main advantages it offers over an Open Source license:
				</p>
				<p>
					Modifications and enhancements do not need to be released under an Open 
					Source license; There is no need to distribute any Open Source license terms 
					along with your product and no reference to it have to be done; You do not have
					to mention any reference to Mergely in your product; Mergely source code does not
					have to be distributed with your product; You can remove any file from Mergely 
					when integrating it with your product.
				</p>
				<p>
					The CDL is a lifetime license valid for all previous releases of Mergely published 
                    prior to the year of purchase, and any releases in the following year. Please select 
                    the license option that best fit your needs above. It includes 1 year of 
                    <b>personal e-mail support</b>.
				</p>
				<h2>Third party codes</h2>
				<p>
					Mergely utilizes <b>CodeMirror</b>, a third-party library released under an 
					<a href="http://en.wikipedia.org/wiki/MIT_License">MIT</a>
					license.  Also used is <b>jQuery</b> and is released under the 
					<a href="http://en.wikipedia.org/wiki/MIT_License">MIT</a> or 
					<a href="http://www.gnu.org/licenses/gpl.html">GPL</a> Version 2 license.
				</p>
            </div>
            
            <div id="footer">
                <a href="/download" class="download">Download</a>
                <ul>
                    <li id="google-plus"><a target="_blank" href="http://groups.google.com/group/mergely">http://groups.google.com/group/mergely</a></li>
                    <li id="github"><a target="_blank" href="https://github.com/wickedest/Mergely">https://github.com/wickedest/Mergely</a></li>
                    <li id="email"><a target="_blank" href="mailto:jamie.peabody@gmail.com">jamie.peabody@gmail.com</a></li>
                </ul>
            </div>
        </div>
        <div id="copyright">By <b>Jamie Peabody</b></div>
    </div>
</body>
</html>