Problem description: channel messages no returned to ajax script. Initially, messages are delivered to clietn side, but the problem appears when I set larger timeout in js:
goog.appengine.Socket.POLLING_TIMEOUT_MS = 5000; //poll every 5 seconds
I've added a very basic Python code to test if Channel API works in my Google App Engine app.
index:
token = channel.create_channel(CHANNEL_NAME)
channel.send_message(CHANNEL_NAME, message)
#token is passed to template
additional_view:
#is another view, trigger manually from browser after index
from django.utils import simplejson
channel.send_message(CHANNEL_NAME, simplejson.dumps(data))
At client side I have a regular js with onMessage code.
The problem is that no messages are returned to client-side requests. They all come empty to polling ajax (as seen in Firebug). In application log I can see that channel is created:
"Creating channel token channel-2382918168-broadcast with client id broadcast" and later message is sent but with a comment:
in between come these requests:
INFO 2011-08-03 14:33:32,000 dev_appserver.py:4248] "POST /_ah/channel/connected/ HTTP/1.1" 404 -
INFO 2011-08-03 14:33:33,780 dev_appserver.py:4248] "POST /_ah/channel/disconnected/ HTTP/1.1" 404 -
** ....message text...to channel with key (broadcast): no clients connected***
How does channel/message function at deeper level? Are messages lost if no clients are connected or they are retrived by newly connect clients? If for some reason I create a channel with the same name, would it distroy undelivered messages it has inside?
