mirror of https://github.com/mitsuhiko/flask.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
2.4 KiB
54 lines
2.4 KiB
.. _becomingbig: |
|
|
|
Becoming Big |
|
============ |
|
|
|
Your application is becoming more and more complex? Flask is really not |
|
designed for large scale applications and does not attempt to do so, but |
|
that does not mean you picked the wrong tool in the first place. |
|
|
|
Flask is powered by Werkzeug and Jinja2, two libraries that are in use at |
|
a number of large websites out there and all Flask does is bringing those |
|
two together. Being a microframework, Flask is literally a single file. |
|
What that means for large applications is that it's probably a good idea |
|
to take the code from Flask and put it into a new module within the |
|
applications and expanding on that. |
|
|
|
What Could Be Improved? |
|
----------------------- |
|
|
|
For instance it makes a lot of sense to change the way endpoints (the |
|
names of the functions / URL rules) are handled to also take the module |
|
name into account. Right now the function name is the URL name, but |
|
imagine you have a large applications consisting of multiple components. |
|
In that case, it makes a lot of sense to use dotted names for the URL |
|
endpoints. |
|
|
|
Here some suggestions how Flask can be modified to better accomodate large |
|
scale applications: |
|
|
|
- implement dotted names for URL endpoints |
|
- get rid of the decorator function registering which causes a lot |
|
of troubles for applications that have circular dependencies. It |
|
also requires that the whole application is imported when the system |
|
initializes or certain URLs will not be available right away. |
|
- switch to explicit request object passing. This makes it more to type |
|
(because you now have something to pass around) but it makes it a |
|
whole lot easier to debug hairy situations and to test the code. |
|
- integrate the `Babel`_ i18n package or `SQLAlchemy`_ directl into the |
|
core framework. |
|
|
|
.. _Babel: http://babel.edgewall.org/ |
|
.. _SQLAlchemy: http://www.sqlalchemy.org/ |
|
|
|
Why does not Flask do all that by Default? |
|
------------------------------------------ |
|
|
|
There is a huge difference between a small application that only has to |
|
handle a couple of requests per second and with an overall code complexity |
|
of less than 4000 lines of code or something of larger scale. At one |
|
point it becomes important to integrate external systems, different |
|
storage backends and more. |
|
|
|
If Flask was designed with all these contingencies in mind, it would be a |
|
much more complex framework and less easy to get started with.
|
|
|