如何为 Pyramid/Pylons 2 编写日志中间件?
我想在pyramid/pylons中使用mongodb或redis来保存用户的日志,但找不到关于如何创建中间件的文档。我该怎么做呢?
4 个回答
2
找不到任何文档真是太奇怪了,因为Python的日志模块文档其实写得很详细、很完整:
http://docs.python.org/library/logging.html#handler-objects
你需要自己实现一个MongoDBHandler,并通过pymongo把emit()方法连接到MongoDB上。
2
在这种情况下,另一个选择是根本不使用中间件,而是直接在Pyramid框架中使用一个叫做BeforeRequest的事件。
from pyramid.events import NewRequest
import logging
def mylogger(event):
request = event.request
logging.info('request occurred')
config.add_subscriber(mylogger, NewRequest)
10
标准中间件
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Pyramid框架中创建应用程序的代码:
from paste.httpserver import serve
from pyramid.response import Response
from pyramid.view import view_config
@view_config()
def hello(request):
return Response('Hello')
if __name__ == '__main__':
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')