I am playing around with a small project to get a better understanding of web technologies. One requirement is that if multiple clients have access to my site, and one make a change all the others should be notified. From what I have gathered Server Sent events seems to do what I want. However when I open my site in both Firefox and Chrome and try to send an event, only one of the browsers gets it. If I send an event again only one of the browsers gets the new event, usually the browser that did not get event number one.
Here is the relevant code snippets.
Client:
console.log("setting sse handlers")
viewEventSource = new EventSource("{{ url_for('viewEventRequest') }}");
viewEventSource.onmessage = handleViewEvent;
function handleViewEvent(event){
console.log("called handle view event")
console.log(event);
}
Server:
@app.route('/3-3-3/view-event')
def view_event_request():
return Response(handle_view_event(), mimetype='text/event-stream')
def handle_view_event():
while True:
for message in pubsub_view.listen():
if message['type'] == 'message':
data = 'retry: 1\n'
data += 'data: ' + message['data'] + '\n\n'
return data
@app.route('/3-3-3/test')
def test():
red.publish('view-event', "This is a test message")
return make_response("success", 200)
My question is, how do I get the event send to all connected clients and not just one?
