Tornadao—正则提取uri

• 正则

  ---

  tornado中对于路由映射也⽀持正则提取uri，提取出来的参数会作为
  RequestHandler中对应请求⽅式的成员⽅法参数。若在正则表达式中定义了名
  字，则参数按名传递；若未定义名字，则参数按顺序传递。提取出来的参数会作为
  对应请求⽅式的成员⽅法的参数。

  ---

  import tornado.web
  import tornado.ioloop
  import tornado.httpserver
  import tornado.options
  from tornado.options import options, define
  from tornado.web import RequestHandler
  define("port", default=8000, type=int, help="run server on the given
  port.")
  
  class IndexHandler(RequestHandler):
   def get(self):
   self.write("hello itcast.")
  class SubjectCityHandler(RequestHandler):
   def get(self, subject, city):
   self.write(("Subject: %s<br/>City: %s" % (subject, city)))
  class SubjectDateHandler(RequestHandler):
   def get(self, date, subject):
   self.write(("Date: %s<br/>Subject: %s" % (date, subject)))
  if __name__ == "__main__":
   tornado.options.parse_command_line()
   app = tornado.web.Application([
   (r"/", IndexHandler),
   (r"/sub-city/(.+)/([a-z]+)", SubjectCityHandler), # ⽆名⽅式
   (r"/sub-date/(?P<subject>.+)/(?P<date>\d+)",
  SubjectDateHandler), #　命名⽅式
   ])
   http_server = tornado.httpserver.HTTPServer(app)
   http_server.listen(options.port)
   tornado.ioloop.IOLoop.current().start()

  import tornado.web
  import tornado.ioloop
  import tornado.options
  from tornado.web import url
  
  from settings import params
  
  
  # 定义接收参数的名称和类型，缺省值
  tornado.options.define('p',default=9090,type=int)
  
  class IndexHandler(tornado.web.RequestHandler):
      def get(self):
          self.write("不到长城非好汉")
  
  
  class ShowHandler(tornado.web.RequestHandler):
      # 接收路由中的附加参数，参数个数和initialize中参数一致
      def initialize(self,name,age):
          self.name = name
          self.age = age
      # def initialize(self,**kwargs):
      #     self.name = kwargs.get('name')
      #     self.age = kwargs.get('age')
  
      def get(self):
          self.write("姓名:{}".format(self.name))
  
  
  class ListHandler(tornado.web.RequestHandler):
      def get(self):
          self.write("路由")
  
  
  class DetailHandler(tornado.web.RequestHandler):
      def get(self,aid):
          print(aid,type(aid))
          self.write("详细信息"+aid)
  
  
  def main():
      # 接收命名行参数
      tornado.options.parse_command_line()
      # 路由的写法
      app = tornado.web.Application(
          [(r'/',IndexHandler),
           (r'/show/',ShowHandler,{'name':'admin','age':20}),
           url(r'/list/',ListHandler,name='list'),
           (r'/detail/(\d+)/',DetailHandler),
           ],
          **params
      )
      app.listen(tornado.options.options.p)
      tornado.ioloop.IOLoop.current().start()
  if __name__ == '__main__':
      main()