49 lines
1.3 KiB
TypeScript
49 lines
1.3 KiB
TypeScript
import {Injectable} from '@angular/core';
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import {global} from '../../src/facade/lang';
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let _nextRequestId = 0;
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export const JSONP_HOME = '__ng_jsonp__';
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var _jsonpConnections: {[key: string]: any} = null;
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function _getJsonpConnections(): {[key: string]: any} {
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if (_jsonpConnections === null) {
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_jsonpConnections = (<{[key: string]: any}>global)[JSONP_HOME] = {};
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}
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return _jsonpConnections;
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}
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// Make sure not to evaluate this in a non-browser environment!
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@Injectable()
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export class BrowserJsonp {
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// Construct a <script> element with the specified URL
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build(url: string): any {
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let node = document.createElement('script');
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node.src = url;
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return node;
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}
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nextRequestID(): string { return `__req${_nextRequestId++}`; }
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requestCallback(id: string): string { return `${JSONP_HOME}.${id}.finished`; }
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exposeConnection(id: string, connection: any) {
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let connections = _getJsonpConnections();
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connections[id] = connection;
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}
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removeConnection(id: string) {
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var connections = _getJsonpConnections();
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connections[id] = null;
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}
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// Attach the <script> element to the DOM
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send(node: any) { document.body.appendChild(<Node>(node)); }
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// Remove <script> element from the DOM
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cleanup(node: any) {
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if (node.parentNode) {
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node.parentNode.removeChild(<Node>(node));
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}
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}
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}
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