feat: allow wildcard endpoint

Author: vlastahajek

src/AsyncJson.h

@@ -201,9 +201,15 @@ class AsyncCallbackJsonWebHandler: public AsyncWebHandler {
 
     if(!(_method & request->method()))
       return false;
-
-    if(_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri+"/")))
-      return false;
+    
+    if (_uri.length() && _uri.endsWith("*")) {
+        String uriTemplate = String(_uri);
+	      uriTemplate = uriTemplate.substring(0, uriTemplate.length() - 1);
+        if (!request->url().startsWith(uriTemplate))
+          return false;
+      } else 
+        if(_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri+"/")))
+          return false;
 
     if ( !request->contentType().equalsIgnoreCase(JSON_MIMETYPE) )
       return false;