web-socket/web-socket.html at master · as2388/web-socket · GitHub

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<link rel="import" href="../polymer/polymer.html">

<polymer-element name="web-socket" attributes="url message auto handleAs sendAs">
    <script>
        Polymer('web-socket', {
            ws: null,
            url: '',
            auto: false,
            handleAs: 'text',
	    sendAs: 'text',

            wsOnOpen: function() {
                this.fire('open');
                this.autoGo();
            },

            wsOnMessage: function(e) {
                if (this.handleAs == 'json') {
                    this.fire('message', JSON.parse(e.data));
                } else {
                    this.fire('message', e.data);
                }
            },

            wsOnClose: function() {
                this.fire('close');
            },

            wsOnError: function(e) {
                this.fire('error', e);
            },

            initialiseWebSocket: function() {
                this.ws = new WebSocket(this.url);

                this.ws.onopen = this.wsOnOpen.bind(this);
                this.ws.onmessage = this.wsOnMessage.bind(this);
                this.ws.onclose = this.wsOnClose.bind(this);
                this.ws.onerror = this.wsOnError.bind(this);
            },

            urlChanged: function() {
                this.initialiseWebSocket();
            },

            messageChanged: function() {
                this.autoGo();
            },

            autoGo: function() {
                if (this.auto) {
                    this.go();
                }
            },

            go: function() {
                if (this.ws == null || (this.ws.readyState != 0 && this.ws.readyState != 1)) {
                    this.initialiseWebSocket();
                } else if (this.ws.readyState == 1 && this.message != undefined) {
		    if (this.sendAs == "json") {
                        this.ws.send(JSON.stringify(this.message));
                    } else {
		        this.ws.send(this.message);
                    }
                }
            }
        })
    </script>
</polymer-element>