https://directvigneron.lesgrappes.com/workers/products-data-worker.js

1function deliverResponseOntoPort( workerPort, status, data ) {
2	workerPort.postMessage({
3		workerFinalStatus: status,
4		workerFinalData: data
5	});
6}
7
8function loadProducts( workerPort, productsUrl ) {
9	var xhr = new XMLHttpRequest();
10	
11	xhr.onload = function() {
12		var products = null;
13		
14		try {
15			products = JSON.parse( xhr.responseText );
16		} catch (error) {
17			deliverResponseOntoPort( workerPort, 500 );
18			
19			return;
20		}
21		
22		deliverResponseOntoPort( workerPort, 200, products );
23	};
24	
25	xhr.onerror = function(e) {
26		deliverResponseOntoPort( workerPort, xhr.status );
27	};
28	
29	xhr.open('GET', productsUrl, true);
30	
31	xhr.send();
32}
33
34onconnect = function(e) {
35   var port = e.ports[0];
36
37   port.onmessage = function(e) {
38	   var productsUrl = e.data.requestUrl;
39
40	   if ( e.data.reason == 'doRequest' ) {
41		   loadProducts( port, productsUrl );
42	   }
43   };
44};