2019獨(dú)角獸企業(yè)重金招聘Python工程師標(biāo)準(zhǔn)>>>

import tornado.web import tornado.ioloop import tornado.auth import tornado.escape import tornado.optionsfrom tornado.options import define, optionsimport mako.lookup import mako.templateimport osdefine('port', default=8888, help='run on given port', type=int)CURRENT_PATH= os.path.dirname(__file__) TEMPLATE_PATH = os.path.join(CURRENT_PATH, 'templates') STATIC_PATH = os.path.join(CURRENT_PATH, 'static')LOOK_UP = mako.lookup.TemplateLookup(directories=[TEMPLATE_PATH,], module_directory='/tmp/mako', output_encoding='utf-8', encoding_errors='replace')class Application(tornado.web.Application):def __init__(self):handlers = [(r'/', MainHandler),]settings = {'cookie_secret':'', 'login_url':'','static_path':STATIC_PATH,'xsrf_cookies':True,}super(Application, self).__init__(handlers, **settings)class BaseHandler(tornado.web.RequestHandler):def initialize(self, lookup=LOOK_UP):''' Set template lookup object, Defalut is LOOK_UP'''self._lookup = lookupdef get_current_user(self):user = self.get_secure_cookie('user')if not user:returnreturn tornado.escape.json_decode(user)def render_string(self, filename, **kwargs):'''Override render_string to use mako template.Like tornado render_string method, this method also pass request handler environment to template engin. '''try:template = self._loolup.get_template(filename)env_kwargs = dict(handler = self,request = self.request,current_user = self.current_user,locale = self.locale,_ = self.locale.translate,static_url = self.static_url,xsrf_form_html = self.xsrf_form_html,reverse_url = self.application.reverse_url,)env_kwargs.update(kwargs)return template.render(**env_kwargs)except:# exception handlerpassdef render(self, filename, **kwargs):self.finish(self.render_string(filename, **kwargs))class MainHandler(BaseHandler):@tornado.web.authenticateddef get(self):self.render('index.html', messages=[])class AuthLoginHandler(BaseHandler, tornado.web.GoogleMixin):@tornado.web.asynchronousdef get(self):if self.get_argument('openid.mode', None):self.get_authenticated_user(self.async_callback(self._on_auth))returnself.authenticate.redirect()def _on_auth(self, user):if not user:raise tornado.web.HTTPError(500, 'Google authenticate failed')self.set_secure_cookie('user', tornado.escape.json_encode(user))self.redirect('/')def main():tornado.options.parse_command_line()app = Application()app.listen(options.port)tornado.ioloop.IOLoop.instance().start()if __name__ == '__main__':main() 如上代碼所示,只需要在派生的BaseHandler override initilize 和 render_string即可. 其他Request handler只要 繼承自BaseHandler即可.這樣就不僅可以使用性能高效的mako模板,而且還能使用tornado模板提供的一些功能.

轉(zhuǎn)載于:https://my.oschina.net/u/140191/blog/48017

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