Pyramid添加Middleware的方法執行個體

假設我們要添加一個我們自己的Middleware,用來記錄每次請求的日誌
下面就是一個符合規範的Middleware, 建構函式中接受一個WSGI APP, __call__返回一個WSGI APP.

代碼如下:

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 Exception, e:
# write logs
pass
finally:
# write logs
pass

在項目的__init__.py的main函數中， 在config.make_wsgi_app上包上一層我們的Middleware:

代碼如下:

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')

