'æåæ å¿§ä»£ç http://www.data5u.com/
:param page: é¡µæ°
:return:'

@staticmethod
@robustCrawl
def freeProxyFirst(page=10):

    url_list = ['http://www.data5u.com/', 'http://www.data5u.com/free/', 'http://www.data5u.com/free/gngn/index.shtml', 'http://www.data5u.com/free/gnpt/index.shtml']
    for url in url_list:
        html_tree = getHtmlTree(url)
        ul_list = html_tree.xpath('//ul[@class="l2"]')
        for ul in ul_list:
            (yield ':'.join(ul.xpath('.//li/text()')[0:2]))
