def get(self, channelid):
"""Return general information on the channel"""
channel = self._getentity(Channel, channelid)
if channel is None: return
anysubscribers = Subscriber.all().filter('channel =', channel).fetch(1)
template_values = {
'channel': channel,
'anysubscribers': anysubscribers,
}
path = os.path.join(os.path.dirname(__file__), 'channel_detail.html')
self.response.out.write(template.render(path, template_values))
def delete(self, channelid):
"""Handle deletion of a channel. Only allow if there are no subscribers"""
channel = self._getentity(Channel, channelid)
if channel is None: return
# Check the subscribers
nrsubscribers = Subscriber.all().filter('channel =', channel).count()
if nrsubscribers:
# Can't delete if subscribers still exist
self.response.set_status(405, "CANNOT DELETE - %s SUBSCRIBERS" % nrsubscribers)
self.response.headers['Allow'] = "GET, POST"
else:
channel.delete()
self.response.set_status(204)
def post(self, channelid):
"""Handles a message publish to this channel"""
channel = self._getentity(Channel, channelid)
if channel is None: return
contenttype = self.request.headers['Content-Type']
# Save message
message = Message(
contenttype = contenttype,
body = self.request.body,
channel = channel,
)
message.put()
# for subscriber in Subscriber.all().filter('channel =', channel):
subscribers = Subscriber.all().filter('channel =', channel)
if subscribers.count():
for subscriber in subscribers:
# Set up delivery of message to subscriber
delivery = Delivery(
message = message,
recipient = subscriber,
)
delivery.put()
# Kick off a task to distribute message
taskqueue.Task(
url='/distributor/' + str(message.key())
).add(QUEUE_DISTRIBUTION)
logging.debug("Delivery queued for %d subscribers of channel %s" % (subscribers.count(), channelid))
else:
logging.debug("No subscribers for channel %s" % (channelid, ))
# TODO should we return a 202 instead of a 302?
# Actually I think it's just a 201, as we've created a new (message) resource
# self.redirect(self.request.url + 'message/' + str(message.key()))
# Try to detect whether we're from the coffeeshop browser, and if so, return a 302
self.response.headers['Location'] = self.request.url + "message/%s" % str(message.key())
if contenttype == "application/x-www-form-urlencoded" and self.request.get('messagesubmissionform') == "coffeeshop":
self.response.set_status(302)
else:
self.response.set_status(201)
def get(self, channelid):
"""Handles a GET to the /channel/{id}/subscriber/ resource
"""
channel = Channel.get_by_id(int(channelid))
if channel is None:
self.response.out.write("Channel %s not found" % (channelid, ))
self.response.set_status(404)
return
subscribers = []
for subscriber in Subscriber.all().filter('channel =', channel):
subscribers.append({
'subscriberid': subscriber.key().id(),
'name': subscriber.name,
'resource': subscriber.resource,
'created': subscriber.created,
})
template_values = {
'channel': channel,
'subscribers': subscribers,
}
path = os.path.join(os.path.dirname(__file__), 'channelsubscriber.html')
self.response.out.write(template.render(path, template_values))
def delete_all_subscribers():
while Subscriber.all().fetch(CHUNK):
db.delete(Subscriber.all().fetch(CHUNK))
def delete_all_subscribers():
while Subscriber.all().fetch(CHUNK):
db.delete(Subscriber.all().fetch(CHUNK))
