I am trying a simple chat application here with socket.io and node.js. Every time I restart the node.js server, socket.io automatically reconnects and somehow creates one more connection to the server, i.e. the client now receives the same chat message twice. How do I fix this?
By default on disconnect socket.io reconnects the lost connection, which re runs the connect
event. So everytime it reconnects you add one more event listener for recieving messages. So you get multiple number of messages equal to server restarts/connection loss.
Incoming Chat:
Connected
dsdadsada
Disconnected //recieved by 1st listener
Connected //added 2nd listener
adasd
Disconnected //recieved by 1st listener
Disconnected //recieved by 2nd listener
Connected //added 3rd listener
You should listen to the first connect using once
instead of on
, which runs eventhandler the first time only. Try
iosocket.once('connect', function () {
instead of
iosocket.on('connect', function () {
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