smtest.py

import functools
import collections

import cherrypy


__metaclass__ = type  # enable new-style classes by default


class SelectedMethod:
    """
    Descriptor allowing a series of handler methods to satisfy
    a variety of behaviors based on the request method.

    Works similar to the MethodDispatcher, but doesn't
    require replacing the whole dispatch mechanism, so
    may be deployed selectively.

    First, decorate your method using SelectedMethod::

        class App:
            @SelectedMethod
            def index(self):
                return "Hello World"

    Then, add separate handlers for specific methods::

            @index.GET
            def get(self):
                return "Your method was GET"

            @index.POST
            def delete(self):
                db.delete(self.id)

    The first handler passed will always handle any methods
    not specified. The app may wish to
    raise 405 in this case::

            @SelectedMethod
            def index(self):
                raise cherrypy.HTTPError("405 Method Not Allowed")
    """
    __isabstractmethod__ = False

    def __init__(self, orig):
        self.methods = collections.defaultdict(lambda: orig)

    def __get__(self, obj, type=None):
        method = self.methods[cherrypy.request.method]
        bound = functools.partial(method, obj)
        bound._cp_config = getattr(method, '_cp_config', {})
        bound.exposed = True
        return bound

    def __getattr__(self, method):
        """
        Return a decorator suitable for wrapping another
        """
        def wrapper(func):
            self.methods[method] = func
            return func
        return wrapper



class People:

    @SelectedMethod
    def index(self):
        return "Default Index"

    @index.GET
    def get(self):
        return "GET"

    @index.POST
    def post(self):
        return "POST"


class WebUi:
    def __init__(self):
        self.people = People()
    @cherrypy.expose()
    def index(self):
        raise cherrypy.HTTPRedirect('/ui/people/')


class WebRoot:
    def __init__(self):
        # Front-end API end-points loaded from '/web/routes/ui.py'
        self.ui = WebUi()

    @cherrypy.expose()
    def index(self):
        raise cherrypy.HTTPRedirect('/ui/')

conf = {} # For purposes of this code sample let's just assume this is properly defined with all the rules it needs....

cherrypy.tree.mount(WebRoot(), '/', conf)

cherrypy.engine.start()