Update

Server/app/svelte/public/js/libraries/serverTools.js

@@ -0,0 +1,64 @@
+
+// Get data from server
+export function getData(path,callback) {   
+    var xhr = new XMLHttpRequest();
+        xhr.overrideMimeType("application/json");
+    xhr.open('GET', path, true);
+    xhr.onreadystatechange = function () {
+          if (xhr.readyState == 4 && xhr.status == "200") {
+            if (callback !== undefined) {
+                callback(xhr.responseText);
+            }
+          }
+    };
+    xhr.send(null);  
+}
+
+ // Parse JSON from given path into a given variable under a given key
+ export function getJSON(variable,key,path) {
+    getData(path,function(response) {
+        // Parse JSON string into object
+        variable[key] = JSON.parse(response);
+    });
+}
+
+export function sendData(route,data,callback) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("POST", route, true)
+    xhr.setRequestHeader('Content-Type', 'application/json')
+    xhr.onreadystatechange = function() { 
+        if(xhr.readyState === XMLHttpRequest.DONE) {
+            var status = xhr.status;
+            if (status === 0 || (status >= 200 && status < 400)) {
+                // The request has been completed successfully
+                if (callback !== undefined) {
+                    callback(xhr.responseText)
+                }
+            } else {
+                // Oh no! There has been an error with the request!
+            }
+            }
+    };
+    xhr.send(JSON.stringify(data))
+}
+
+export function sendText(route,data,callback) {
+    var xhr = new XMLHttpRequest();
+    xhr.open("POST", route, true)
+    xhr.setRequestHeader('Content-Type', 'text/plain')
+    xhr.onreadystatechange = function() { 
+        if(xhr.readyState === XMLHttpRequest.DONE) {
+            var status = xhr.status;
+            if (status === 0 || (status >= 200 && status < 400)) {
+                // The request has been completed successfully
+                if (callback !== undefined) {
+                    callback(xhr.responseText)
+                }
+            } else {
+                // Oh no! There has been an error with the request!
+            }
+            }
+    };
+    xhr.send(data)
+}
+