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