假设我们要添加一个我们自己的Middleware,用来记录每次请求的日志

下面就是一个符合规范的Middleware, 构造函数中接受一个WSGI APP, __call__返回一个WSGI APP.

复制代码 代码如下:

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

在项目的__init__.py的main函数中， 在config.make_wsgi_app上包上一层我们的Middleware:

复制代码 代码如下:

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')