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54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
import functools
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from django.core.handlers.base import BaseHandler
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from django.http import HttpRequest, HttpResponse
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from channels import Channel, channel_backends, DEFAULT_CHANNEL_BACKEND
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class UrlConsumer(object):
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"""
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Dispatches channel HTTP requests into django's URL system.
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"""
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def __init__(self):
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self.handler = BaseHandler()
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self.handler.load_middleware()
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def __call__(self, channel, **kwargs):
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request = HttpRequest.channel_decode(kwargs)
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try:
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response = self.handler.get_response(request)
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except HttpResponse.ResponseLater:
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return
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Channel(request.response_channel).send(**response.channel_encode())
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def view_producer(channel_name):
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"""
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Returns a new view function that actually writes the request to a channel
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and abandons the response (with an exception the Worker will catch)
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"""
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def producing_view(request):
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Channel(channel_name).send(**request.channel_encode())
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raise HttpResponse.ResponseLater()
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return producing_view
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def view_consumer(channel_name, alias=DEFAULT_CHANNEL_BACKEND):
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"""
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Decorates a normal Django view to be a channel consumer.
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Does not run any middleware
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"""
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def inner(func):
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@functools.wraps(func)
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def consumer(channel, **kwargs):
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request = HttpRequest.channel_decode(kwargs)
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response = func(request)
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Channel(request.response_channel).send(**response.channel_encode())
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# Get the channel layer and register
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channel_backend = channel_backends[DEFAULT_CHANNEL_BACKEND]
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channel_backend.registry.add_consumer(consumer, [channel_name])
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return func
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return inner
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