3 üZð]ªã @sndZddlmZddlmZedddddd d d gƒZGd d „d eƒZGdd„de ƒZ Gdd„dee eƒƒZ dS)z¦ flask.views ~~~~~~~~~~~ This module provides class-based views inspired by the ones in Django. :copyright: 2010 Pallets :license: BSD-3-Clause é)Úwith_metaclass)ÚrequestÚgetÚpostÚheadÚoptionsÚdeleteÚputÚtraceÚpatchc@s0eZdZdZdZdZfZdd„Zedd„ƒZ dS)ÚViewa©Alternative way to use view functions. A subclass has to implement :meth:`dispatch_request` which is called with the view arguments from the URL routing system. If :attr:`methods` is provided the methods do not have to be passed to the :meth:`~flask.Flask.add_url_rule` method explicitly:: class MyView(View): methods = ['GET'] def dispatch_request(self, name): return 'Hello %s!' % name app.add_url_rule('/hello/', view_func=MyView.as_view('myview')) When you want to decorate a pluggable view you will have to either do that when the view function is created (by wrapping the return value of :meth:`as_view`) or you can use the :attr:`decorators` attribute:: class SecretView(View): methods = ['GET'] decorators = [superuser_required] def dispatch_request(self): ... The decorators stored in the decorators list are applied one after another when the view function is created. Note that you can *not* use the class based decorators since those would decorate the view class and not the generated view function! NcCs tƒ‚dS)z­Subclasses have to override this method to implement the actual view function code. This method is called with all the arguments from the URL rule. N)ÚNotImplementedError)Úself©rú,/tmp/pip-build-w1as9q70/flask/flask/views.pyÚdispatch_requestEszView.dispatch_requestcsl‡‡‡fdd„‰|jr<|ˆ_|jˆ_x|jD] }|ˆƒ‰q,W|ˆ_|ˆ_|jˆ_|jˆ_|jˆ_|jˆ_ˆS)a€Converts the class into an actual view function that can be used with the routing system. Internally this generates a function on the fly which will instantiate the :class:`View` on each request and call the :meth:`dispatch_request` method on it. The arguments passed to :meth:`as_view` are forwarded to the constructor of the class. csˆjˆˆŽ}|j||ŽS)N)Ú view_classr)ÚargsÚkwargsr)Ú class_argsÚ class_kwargsÚviewrrrWs zView.as_view..view)Ú decoratorsÚ__name__Ú __module__rÚ__doc__ÚmethodsÚprovide_automatic_options)ÚclsÚnamerrZ decoratorr)rrrrÚas_viewLs   z View.as_view) rrÚ __qualname__rrrrrÚ classmethodr rrrrr s  r cs eZdZdZ‡fdd„Z‡ZS)ÚMethodViewTypezYMetaclass for :class:`MethodView` that determines what methods the view defines. cs|tt|ƒj|||ƒd|krxtƒ}x$|D]}t|ddƒr(|j|jƒq(Wx$tD]}t||ƒrN|j |j ƒƒqNW|rx||_dS)Nr) Úsuperr#Ú__init__ÚsetÚgetattrÚupdaterÚhttp_method_funcsÚhasattrÚaddÚupper)rrÚbasesÚdrÚbaseÚkey)Ú __class__rrr%ts    zMethodViewType.__init__)rrr!rr%Ú __classcell__rr)r1rr#osr#c@seZdZdZdd„ZdS)Ú MethodViewaA class-based view that dispatches request methods to the corresponding class methods. For example, if you implement a ``get`` method, it will be used to handle ``GET`` requests. :: class CounterAPI(MethodView): def get(self): return session.get('counter', 0) def post(self): session['counter'] = session.get('counter', 0) + 1 return 'OK' app.add_url_rule('/counter', view_func=CounterAPI.as_view('counter')) cOsPt|tjjƒdƒ}|dkr0tjdkr0t|ddƒ}|dk sFtdtjƒ‚|||ŽS)NÚHEADrzUnimplemented method %r)r'rÚmethodÚlowerÚAssertionError)rrrÚmethrrrršs  zMethodView.dispatch_requestN)rrr!rrrrrrr3Šsr3N) rÚ_compatrÚglobalsrÚ frozensetr)Úobjectr Útyper#r3rrrrÚ s  [