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