basic game creation

client/modules/XHRUtility.js

@@ -0,0 +1,40 @@
+export const XHRUtility =
+    {
+        standardHeaders: [['Content-Type', 'application/json'], ['Accept', 'application/json'], ['X-Requested-With', 'XMLHttpRequest']],
+
+        // Easily make XHR calls with a promise wrapper. Defaults to GET and MIME type application/JSON
+        xhr (url, method = 'GET', headers, body = null) {
+            if (headers === undefined || headers === null) {
+                headers = this.standardHeaders;
+            }
+            if (typeof url !== 'string' || url.trim().length < 1) {
+                return Promise.reject('Cannot request with empty URL: ' + url);
+            }
+
+            const req = new XMLHttpRequest();
+            req.open(method, url.trim());
+
+            for (const hdr of headers) {
+                if (hdr.length !== 2) continue;
+                req.setRequestHeader(hdr[0], hdr[1]);
+            }
+
+            return new Promise((resolve, reject) => {
+                req.onload = function () {
+                    const response = {
+                        status: this.status,
+                        statusText: this.statusText,
+                        content: this.responseText
+                    };
+                    if (this.status >= 200 && this.status < 400) {
+                        resolve(response);
+                    } else {
+                        reject(response);
+                    }
+                };
+                body ? req.send(body) : req.send();
+            });
+        },
+
+
+    };