Pyramid: Method Instance for adding Middleware

Suppose we want to add our own Middleware to record the logs of each request.
The following is a standard Middleware. The constructor accepts a wsgi app and _ call _ returns a wsgi app.

Copy codeThe Code is as follows:
Class LoggerMiddleware (object ):
'''Wsgi middleware '''

Def _ init _ (self, application ):

Self. app = application

Def _ call _ (self, environ, start_response ):

# Write logs

Try:
Return self. app (environ, start_response)
Except t Exception, e:
# Write logs
Pass
Finally:
# Write logs
Pass

In the main function of Project _ init _. py, package a layer of our Middleware on config. make_wsgi_app:

Copy codeThe Code is as follows:
From pyramid. config import Configurator
Config = Configurator ()
Config. scan ()
App = config. make_wsgi_app ()

# Put middleware
App = LoggerMiddleware (app)

Serve (app, host = '0. 0.0.0 ')