def index(self):
        """Produce HTTP response body of file upload app index URI."""
        return """
        <html><body>
            <h2>Upload a file</h2>
            <form action="upload" method="post" enctype="multipart/form-data">
            filename: <input type="file" name="myFile" /><br />
            <input type="submit" />
            </form>
            <h2>Download a file</h2>
            <a href='download'>This one</a>
        </body></html>
        """
Produce HTTP response body of file upload app index URI.
cherrypy/tutorial/tut09_files.py