def open_file(self, url):
        path = urllib.url2pathname(urllib.unquote(url))
        if os.path.isdir(path):
            if path[-1] != os.sep:
                url = url + '/'
            indexpath = os.path.join(path, "index.html")
            if os.path.exists(indexpath):
                return self.open_file(url + "index.html")
            try:
                names = os.listdir(path)
            except os.error, msg:
                exc_type, exc_value, exc_tb = sys.exc_info()
                raise IOError, msg, exc_tb
            names.sort()
            s = MyStringIO("file:"+url, {'content-type': 'text/html'})
            s.write('<BASE HREF="file:%s">\n' %
                    urllib.quote(os.path.join(path, "")))
            for name in names:
                q = urllib.quote(name)
                s.write('<A HREF="%s">%s</A>\n' % (q, q))
            s.seek(0)
            return s
        return urllib.FancyURLopener.open_file(self, url)
dataset/ETHPy150Open francelabs/datafari/windows/python/Tools/webchecker/webchecker.py/MyURLopener.open_file/original