60 lines
2.4 KiB
TypeScript
60 lines
2.4 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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// we have to patch the instance since the proto is non-configurable
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export function apply(api: _ZonePrivate, _global: any) {
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const {ADD_EVENT_LISTENER_STR, REMOVE_EVENT_LISTENER_STR} = api.getGlobalObjects() !;
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const WS = (<any>_global).WebSocket;
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// On Safari window.EventTarget doesn't exist so need to patch WS add/removeEventListener
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// On older Chrome, no need since EventTarget was already patched
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if (!(<any>_global).EventTarget) {
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api.patchEventTarget(_global, [WS.prototype]);
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}
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(<any>_global).WebSocket = function(x: any, y: any) {
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const socket = arguments.length > 1 ? new WS(x, y) : new WS(x);
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let proxySocket: any;
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let proxySocketProto: any;
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// Safari 7.0 has non-configurable own 'onmessage' and friends properties on the socket instance
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const onmessageDesc = api.ObjectGetOwnPropertyDescriptor(socket, 'onmessage');
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if (onmessageDesc && onmessageDesc.configurable === false) {
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proxySocket = api.ObjectCreate(socket);
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// socket have own property descriptor 'onopen', 'onmessage', 'onclose', 'onerror'
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// but proxySocket not, so we will keep socket as prototype and pass it to
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// patchOnProperties method
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proxySocketProto = socket;
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[ADD_EVENT_LISTENER_STR, REMOVE_EVENT_LISTENER_STR, 'send', 'close'].forEach(function(
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propName) {
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proxySocket[propName] = function() {
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const args = api.ArraySlice.call(arguments);
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if (propName === ADD_EVENT_LISTENER_STR || propName === REMOVE_EVENT_LISTENER_STR) {
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const eventName = args.length > 0 ? args[0] : undefined;
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if (eventName) {
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const propertySymbol = Zone.__symbol__('ON_PROPERTY' + eventName);
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socket[propertySymbol] = proxySocket[propertySymbol];
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}
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}
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return socket[propName].apply(socket, args);
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};
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});
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} else {
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// we can patch the real socket
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proxySocket = socket;
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}
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api.patchOnProperties(proxySocket, ['close', 'error', 'message', 'open'], proxySocketProto);
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return proxySocket;
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};
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const globalWebSocket = _global['WebSocket'];
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for (const prop in WS) {
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globalWebSocket[prop] = WS[prop];
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}
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}
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