52 lines
1.4 KiB
JavaScript
52 lines
1.4 KiB
JavaScript
(function() {
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var WebSocketProvider = function(host) {
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// onmessage handlers
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this.handlers = [];
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// queue will be filled with messages if send is invoked before the ws is ready
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this.queued = [];
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this.ready = false;
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this.ws = new WebSocket(host);
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var self = this;
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this.ws.onmessage = function(event) {
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for(var i = 0; i < self.handlers.length; i++) {
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self.handlers[i].call(self, JSON.parse(event.data), event)
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}
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};
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this.ws.onopen = function() {
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self.ready = true;
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for(var i = 0; i < self.queued.length; i++) {
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// Resend
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self.send(self.queued[i]);
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}
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};
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};
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WebSocketProvider.prototype.send = function(payload) {
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if(this.ready) {
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var data = JSON.stringify(payload);
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this.ws.send(data);
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} else {
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this.queued.push(payload);
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}
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};
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WebSocketProvider.prototype.onMessage = function(handler) {
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this.handlers.push(handler);
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};
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WebSocketProvider.prototype.unload = function() {
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this.ws.close();
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};
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Object.defineProperty(WebSocketProvider.prototype, "onmessage", {
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set: function(provider) { this.onMessage(provider); }
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});
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if(typeof(web3) !== "undefined" && web3.providers !== undefined) {
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web3.providers.WebSocketProvider = WebSocketProvider;
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}
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})();
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