From f6c6a630bc3aec06dc4252949c9ad1c0eb602efd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Komj=C3=A1ti=20J=C3=A1nos?= <freejanos@gmail.com>
Date: Thu, 8 Dec 2022 23:03:22 +0100
Subject: [PATCH] ajax

resolves #392
---
 [web]/ajax/ajax.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/[web]/ajax/ajax.js b/[web]/ajax/ajax.js
index 543278de1..fcc3bf6c4 100644
--- a/[web]/ajax/ajax.js
+++ b/[web]/ajax/ajax.js
@@ -26,6 +26,15 @@ function decode( uri ) {
     return uri;
 }
 
+// Check data is JSON
+function isJSON(str) {
+	try {
+		JSON.parse(str);
+	} catch (e) {
+		return false;
+	}
+    return true;
+}
 
 function AJAXRequest( method, url, data, process, async, dosend) {
     var self = this;
@@ -84,7 +93,7 @@ function AJAXRequest( method, url, data, process, async, dosend) {
     }
 
     self.AJAX.open(method, url, async);
-
+	
     if (method == "POST") {
         //self.AJAX.setRequestHeader("Connection", "close"); // seems to cause issues in IE
         self.AJAX.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
@@ -96,6 +105,9 @@ function AJAXRequest( method, url, data, process, async, dosend) {
     // you'd do this to set special request headers
     if ( dosend || typeof dosend == 'undefined' ) {
 	    if ( !data ) data="";
+		if (method == "POST" && isJSON(data)) // change content type
+			self.AJAX.setRequestHeader("Content-Type", "application/json");
+			
 	    self.AJAX.send(data);
     }
     return self.AJAX;