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Exposing
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Any object that is attached to the root object is traversible via the internal
URL-to-object mapping routine. However, it does not mean that the object itself
is directly accessible via the Web. For this to happen, the object has to be
**exposed**.
Exposing objects
----------------
CherryPy maps URL requests to objects and invokes the suitable callable
automatically. The callables that can be invoked as a result of external
requests are said to be **exposed**.
Objects are **exposed** in CherryPy by setting the ``exposed`` attribute.
Most often, a method on an object is the callable that is to be invoked. In
this case, one can directly set the exposed attribute::
class Root:
def index(self):
...
index.exposed = True
or use a decorator::
@cherrypy.expose
def index(self):
...
When it is a special method, such as ``__call__``, that is to be invoked,
the exposed attribute must be set on the class itself::
class Node:
exposed = True
def __call__(self):
...
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