Tornado-–handler URL Regular

Turn from: Http://my.oschina.net/jiemachina/blog/204878tornado (ii)-–handler URL regular Handler URL regular match, Get/post1. Simple

    application = tornado.web.Application([        (r‘/‘, MainHandler)    

2. With parameters

    class ProfileHandler(RequestHandler):            def initialize(self, database):                self.database = database            def get(self, username):                print username        app = Application([            (r‘/user/(.*)‘, ProfileHandler, dict(database=database)),            ])

This code comes to Tornado.web.RequestHandler's initialize comment, which (.*) is used to match the parameters in the Get method, such as: The first (.*) match username ; If you want get to have multiple arguments: get(self, username, password) ; Then the configuration r‘/user/(.*)/(.*)‘ can be the (.*) value of the second regular matching group; Let's cite a few examples:

As follows:

url: localhost:9002/user/hander_parse: (r‘/user/‘, ProfileHandler)get(self):-------------------------------------------url:localhost:9002/user/username/passwordhander_parse: (r‘/user/(.*)/(.*)‘, ProfileHandler)#这里主要正则匹配url,get(self, username, password):    print username, ‘  ‘, password-------------------------------------------url:localhost:9002/user/username_passwordhander_parse: (r‘/user/(.*)_(.*)‘, ProfileHandler)get(self, username, password):    print username, ‘  ‘, password

If you like to pass a lot of parameters in the URL, so the Get method does not have a lot of parameters??? So there's an easy way

get(self, *args):    print str(args)

So the above said so much nonsense, after all use this bar;

3. Understanding the process of regular matching

Debug in application, you can view the source code of tornado.web.py.
From:

(r‘/profile/(.*)‘, ProfileHandler, dict(database="mysql"))

--Convert into

URLSpec(r‘/profile/(.*)‘, ProfileHandler, dict(database="mysql"))# 会把所有的URLSpec放到self.handlers 中

Then the RequestHandler subclasses will

-

Call Requesthandler.initialize (**kwargs)

So when there is Dict (database=database)

(r‘/user/(.*)‘, ProfileHandler, dict(database=database)),

, you can have:

def initialize(self, database):    self.database = database

Tornado-–handler URL Regular