拦截WSGI start_response的适当方法是什么? [英] What is the appropriate way to intercept WSGI start_response?
问题描述
我有WSGI中间件,该中间件需要捕获中间件内层通过调用start_response
返回的HTTP状态(例如200 OK
).目前,我正在执行以下操作,但是滥用列表似乎并不是我的正确"解决方案:
I have WSGI middleware that needs to capture the HTTP status (e.g. 200 OK
) that inner layers of middleware return by calling start_response
. Currently I'm doing the following, but abusing a list doesn't seem to be the "right" solution to me:
class TransactionalMiddlewareInterface(object):
def __init__(self, application, **config):
self.application = application
self.config = config
def __call__(self, environ, start_response):
status = []
def local_start(stat_str, headers=[]):
status.append(int(stat_str.split(' ')[0]))
return start_response(stat_str, headers)
try:
result = self.application(environ, local_start)
finally:
status = status[0] if status else 0
if status > 199 and status
列表滥用的原因是,我无法从完全包含的函数中为父名称空间分配新值.
The reason for the list abuse is that I can not assign a new value to the parent namespace from within a wholly contained function.
推荐答案
您可以将状态分配为local_start
函数本身的注入字段,而不是使用status
列表.我使用了类似的东西,效果很好:
You can assign the status as an injected field of local_start
function itself rather than using status
list. I used something similar, works fine:
class TransactionalMiddlewareInterface(object):
def __init__(self, application, **config):
self.application = application
self.config = config
def __call__(self, environ, start_response):
def local_start(stat_str, headers=[]):
local_start.status = int(stat_str.split(' ')[0])
return start_response(stat_str, headers)
try:
result = self.application(environ, local_start)
finally:
if local_start.status and local_start.status > 199:
pass
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