Major improvements in IDE usability.

1 files changed, 0 insertions, 73 deletions

diff --git a/studio/static/doc/flask-docs/_sources/patterns/deferredcallbacks.txt b/studio/static/doc/flask-docs/_sources/patterns/deferredcallbacks.txt
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-.. _deferred-callbacks:
-
-Deferred Request Callbacks
-==========================
-
-One of the design principles of Flask is that response objects are created
-and passed down a chain of potential callbacks that can modify them or
-replace them.  When the request handling starts, there is no response
-object yet.  It is created as necessary either by a view function or by
-some other component in the system.
-
-But what happens if you want to modify the response at a point where the
-response does not exist yet?  A common example for that would be a
-before-request function that wants to set a cookie on the response object.
-
-One way is to avoid the situation.  Very often that is possible.  For
-instance you can try to move that logic into an after-request callback
-instead.  Sometimes however moving that code there is just not a very
-pleasant experience or makes code look very awkward.
-
-As an alternative possibility you can attach a bunch of callback functions
-to the :data:`~flask.g` object and call then at the end of the request.
-This way you can defer code execution from anywhere in the application.
-
-
-The Decorator
--------------
-
-The following decorator is the key.  It registers a function on a list on
-the :data:`~flask.g` object::
-
-    from flask import g
-
-    def after_this_request(f):
-        if not hasattr(g, 'after_request_callbacks'):
-            g.after_request_callbacks = []
-        g.after_request_callbacks.append(f)
-        return f
-
-
-Calling the Deferred
---------------------
-
-Now you can use the `after_this_request` decorator to mark a function to
-be called at the end of the request.  But we still need to call them.  For
-this the following function needs to be registered as
-:meth:`~flask.Flask.after_request` callback::
-
-    @app.after_request
-    def call_after_request_callbacks(response):
-        for callback in getattr(g, 'after_request_callbacks', ()):
-            response = callback(response)
-        return response
-
-
-A Practical Example
--------------------
-
-Now we can easily at any point in time register a function to be called at
-the end of this particular request.  For example you can remember the
-current language of the user in a cookie in the before-request function::
-
-    from flask import request
-
-    @app.before_request
-    def detect_user_language():
-        language = request.cookies.get('user_lang')
-        if language is None:
-            language = guess_language_from_request()
-            @after_this_request
-            def remember_language(response):
-                response.set_cookie('user_lang', language)
-        g.language = language