Menu
I have some code I want to run for every request that comes into Flask-- specifically adding some analytics information. I know I could do this with a decorator, but I'd rather not waste the extra lines of code for each of my views. Is there a way to just write this code in a catch all that will be applied before or after each view?
552
Any flask application, while handling a request, creates a Request object. This object created is dependent on the environment as received by the WSGI server. A worker is able to handle only one request at a time. As the request is made, the flask application automatically pushes a request context during the course.
By default, the server can handle multiple client requests without the programmer having to do anything special in the application. However, if you wish your application to handle a massive amount of simultaneous connections, you could make use of a suitable messaging library such as ZeroMQ.
Flask will process one request per thread at the same time. If you have 2 processes with 4 threads each, that's 8 concurrent requests. Flask doesn't spawn or manage threads or processes.
Improve performance in both Blocking and Non-Blocking web servers. Multitasking is the ability to execute multiple tasks or processes (almost) at the same time. Modern web servers like Flask, Django, and Tornado are all able to handle multiple requests simultaneously.
Flask has dedicated hooks called before and after requests. Surprisingly, they are called:
Flask.before_request()Flask.after_request()Both are decorators:
@app.before_request
def do_something_whenever_a_request_comes_in():
# request is available
@app.after_request
def do_something_whenever_a_request_has_been_handled(response):
# we have a response to manipulate, always return one
return response
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
