[Tutor] asyncio and wsgiref problem

[Etienne Robillard]

OK i figured that wsgiref (PEP-3333) is currently incompatible with 
asyncio. I'm not sure about the motivations of this incompatibility. 
Would it be so hard to make a "wsgiref.asyncio_server" extension for 
people wanting to use wsgiref for development without having to use a 
third-party extension?

Anyways, I'm now using uWSGI for development and testing.

Etienne



Le 2017-11-08 à 15:30, Etienne Robillard a écrit :
> This code is compatible with PEP-3333 on Python 3.5.3:
>
> @asyncio.coroutine
> def app(environ, start_response):
>     try:
>         result = (yield from AsyncIOController().application(environ, 
> start_response))
>     except:
>         raise
>     else:
>
>         #XXX result is a generator. this should not be needed?
>
>         yield from result
>
> I updated my server code like so:
>
> class AsyncIOController(WSGIController):
>     def __init__(self, settings=None, executor=None, loop=None
>         ):
>         super(AsyncIOController, self).__init__(settings)
>         # asyncio config.
>         self._executor = executor
>         self._loop = loop or get_event_loop()
>
>     #@asyncio.coroutine
>     def get_response(self, request=None, method='GET', data={}):
>         response = super(AsyncIOController, self).get_response(request)
>         return response
>
>     @asyncio.coroutine
>     def application(self, environ, start_response):
>         with sessionmanager(environ):
>             request.environ.update(environ)
>             response = self.get_response(request=request)
>         #assert isinstance(response, bytes), type(response)
>         return response(environ, start_response)
>
>     @asyncio.coroutine
>     def __call__(self, environ, start_response, exc_info=None):
>         result = self.application(environ, start_response)
>         return result
>
> How can i avoid calling "yield" twice in my test script ?
>
> Thank you,
>
> Etienne
>
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-- 
Etienne Robillard
tkadm30 at yandex.com
http://www.isotopesoftware.ca/