abhishekagarwal87 commented on code in PR #17045:
URL: https://github.com/apache/druid/pull/17045#discussion_r1758203820


##########
processing/src/main/java/org/apache/druid/data/input/impl/HttpInputSource.java:
##########
@@ -100,13 +100,15 @@ public static void 
throwIfInvalidProtocols(HttpInputSourceConfig config, List<UR
 
   public static void throwIfForbiddenHeaders(HttpInputSourceConfig config, 
Map<String, String> requestHeaders)
   {
-    if (config.getAllowedHeaders().size() > 0) {
-      for (Map.Entry<String, String> entry : requestHeaders.entrySet()) {
-        if 
(!config.getAllowedHeaders().contains(StringUtils.toLowerCase(entry.getKey()))) 
{
-          throw InvalidInput.exception("Got forbidden header %s, allowed 
headers are only %s ",
-                                       entry.getKey(), 
config.getAllowedHeaders()
-          );
-        }
+    String message = null;
+    if (config.getAllowedHeaders().size() == 0 && requestHeaders.size() > 0) {
+      message = "You can set the property druid.ingestion.http.allowedHeaders 
in middle managers or peons to whitelist request headers";
+    }

Review Comment:
   this block can be removed while keeping the functionality just the same as 
before. 



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