Source code for cherrypy.tutorial.tut04_complex_site

Tutorial - Multiple objects

This tutorial shows you how to create a site structure through multiple
possibly nested request handler objects.

import os.path

import cherrypy

[docs]class HomePage:
[docs] @cherrypy.expose def index(self): return ''' <p>Hi, this is the home page! Check out the other fun stuff on this site:</p> <ul> <li><a href="/joke/">A silly joke</a></li> <li><a href="/links/">Useful links</a></li> </ul>'''
[docs]class JokePage:
[docs] @cherrypy.expose def index(self): return ''' <p>"In Python, how do you create a string of random characters?" -- "Read a Perl file!"</p> <p>[<a href="../">Return</a>]</p>'''
[docs]class LinksPage: def __init__(self): # Request handler objects can create their own nested request # handler objects. Simply create them inside their __init__ # methods! self.extra = ExtraLinksPage()
[docs] @cherrypy.expose def index(self): # Note the way we link to the extra links page (and back). # As you can see, this object doesn't really care about its # absolute position in the site tree, since we use relative # links exclusively. return ''' <p>Here are some useful links:</p> <ul> <li> <a href="">The CherryPy Homepage</a> </li> <li> <a href="">The Python Homepage</a> </li> </ul> <p>You can check out some extra useful links <a href="./extra/">here</a>.</p> <p>[<a href="../">Return</a>]</p> '''
[docs]class ExtraLinksPage:
[docs] @cherrypy.expose def index(self): # Note the relative link back to the Links page! return ''' <p>Here are some extra useful links:</p> <ul> <li><a href=""></a></li> <li><a href="">CherryPy</a></li> </ul> <p>[<a href="../">Return to links page</a>]</p>'''
# Of course we can also mount request handler objects right here! root = HomePage() root.joke = JokePage() root.links = LinksPage() # Remember, we don't need to mount ExtraLinksPage here, because # LinksPage does that itself on initialization. In fact, there is # no reason why you shouldn't let your root object take care of # creating all contained request handler objects. tutconf = os.path.join(os.path.dirname(__file__), 'tutorial.conf') if __name__ == '__main__': # CherryPy always starts with app.root when trying to map request URIs # to objects, so we need to mount a request handler root. A request # to '/' will be mapped to HelloWorld().index(). cherrypy.quickstart(root, config=tutconf)