em-websocket and javascript client connection - websocket

Question

I've got a simple eventmachine web socket server (eventmachine 1.0.0):
EM.run {
# WebSocket Server
EM::WebSocket.start(:host => "0.0.0.0", :port => 8080) do |ws|
ws.onopen do
sid = #channel.subscribe{|msg| ws.send msg }
puts "* new WebSocket client <#{sid}> connected!"
end
ws.onmessage do |msg|
puts "* websocket client <#{#sid}> : #{msg}"
end
ws.onclose do
#channel.unsubscribe(sid)
puts "* websocket client <#{#sid}> closed"
end
end
}
I'm trying to connect to it through a javascript client with the following code:
socket = new WebSocket("ws://localhost:8080");
socket.onopen = function(e) {
socket.send('Connesso');
};
socket.onmessage = function(mess) {
if (mess) {
socket.send(mess);
}
};
socket.onclose = function(e) {
socket.send('Disconnesso');
};
With previous versions of safari it was working flawlessly with the latest one the client is not connecting to the server.
I tried it also with last Chrome Dev stable version but it's not working.
The web socket header is sent but it remains in pending status.
If I send a text message to the web socket I receive the INVALID_STATE_ERR: DOM Exception 11.
I saw that there has been a draft change but I thought em-websocket 0.3.8 already implemented it.
Can you help me solve this issue?
Thanks a lot

Answer 1

INVALID_STATE_ERR: DOM Exception 11 means your websocket is not in ready state yet.
you can check state of websocket object by socket.readyState
you are able to send messages when socket.readyState == 1
I created a turnaround for this by using timeout
timerId = setInterval(sendDataWhenReady, 1000);
function sendDataWhenReady(){
if(socket.readyState == 1){
ws.send(JSON.stringify({"type": 'STATUS', "status": status, "username": logged_in_user}))
clearInterval(timerId);
}
}