X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=client%2Fsrc%2Futils%2Fajax.js;h=83b045c02bbda02ccd87a2bf24f34848ca4dbea5;hb=6f57a9769ad80459d086abf5232d01ec1ce7a470;hp=c0ebbffcf4b256be24f9a4811f5da138f9cb93c1;hpb=98f485791e915563996de4f37430b285ffc773ae;p=vchess.git

diff --git a/client/src/utils/ajax.js b/client/src/utils/ajax.js
index c0ebbffc..83b045c0 100644
--- a/client/src/utils/ajax.js
+++ b/client/src/utils/ajax.js
@@ -1,5 +1,8 @@
 import params from "../parameters"; //for server URL
 
+// TODO: replace by fetch API ?
+// https://www.sitepoint.com/xmlhttprequest-vs-the-fetch-api-whats-best-for-ajax-in-2019/
+
 // From JSON (encoded string values!) to "arg1=...&arg2=..."
 function toQueryString(data)
 {
@@ -14,15 +17,16 @@ function toQueryString(data)
 export function ajax(url, method, data, success, error)
 {
 	let xhr = new XMLHttpRequest();
-	if (typeof(data) === "function") //no data
+	if (data === undefined || typeof(data) === "function") //no data
 	{
 		error = success;
 		success = data;
 		data = {};
 	}
+  if (!success)
+    success = () => {}; //by default, do nothing
 	if (!error)
 		error = errmsg => { alert(errmsg); };
-
 	xhr.onreadystatechange = function() {
 		if (this.readyState == 4 && this.status == 200)
 		{
@@ -33,10 +37,15 @@ export function ajax(url, method, data, success, error)
 				// Plain text (e.g. for rules retrieval)
 				return success(xhr.responseText);
       }
-      if (!res_json.errmsg)
+      if (!res_json.errmsg && !res_json.errno)
         success(res_json);
 			else
-				error(res_json.errmsg);
+      {
+        if (!!res_json.errmsg)
+				  error(res_json.errmsg);
+        else
+          error(res_json.code + ". errno = " + res_json.errno);
+      }
 		}
 	};