add simple logging about HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE

src/main/java/com/teragrep/lsh_01/HttpInitializer.java

@@ -20,12 +20,12 @@
 package com.teragrep.lsh_01;
 
 import com.teragrep.lsh_01.config.InternalEndpointUrlConfig;
+import com.teragrep.lsh_01.util.LoggingHttpObjectAggregator;
 import com.teragrep.lsh_01.util.SslHandlerProvider;
 import io.netty.channel.ChannelInitializer;
 import io.netty.channel.ChannelPipeline;
 import io.netty.channel.socket.SocketChannel;
 import io.netty.handler.codec.http.HttpContentDecompressor;
-import io.netty.handler.codec.http.HttpObjectAggregator;
 import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.HttpServerCodec;
 import io.netty.handler.ssl.SslHandler;
@@ -67,7 +67,7 @@ protected void initChannel(SocketChannel socketChannel) throws Exception {
         }
         pipeline.addLast(new HttpServerCodec());
         pipeline.addLast(new HttpContentDecompressor());
-        pipeline.addLast(new HttpObjectAggregator(maxContentLength));
+        pipeline.addLast(new LoggingHttpObjectAggregator(maxContentLength));
         pipeline
                 .addLast(
                         new HttpServerHandler(

src/main/java/com/teragrep/lsh_01/util/LoggingHttpObjectAggregator.java

@@ -0,0 +1,46 @@
+/*
+  logstash-http-input to syslog bridge
+  Copyright 2024 Suomen Kanuuna Oy
+
+  Derivative Work of Elasticsearch
+  Copyright 2012-2015 Elasticsearch
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+package com.teragrep.lsh_01.util;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.handler.codec.http.HttpMessage;
+import io.netty.handler.codec.http.HttpObjectAggregator;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+public class LoggingHttpObjectAggregator extends HttpObjectAggregator {
+
+    private static final Logger LOGGER = LogManager.getLogger(LoggingHttpObjectAggregator.class);
+
+    public LoggingHttpObjectAggregator(int maxContentLength) {
+        super(maxContentLength);
+    }
+
+    public LoggingHttpObjectAggregator(int maxContentLength, boolean closeOnExpectationFailed) {
+        super(maxContentLength, closeOnExpectationFailed);
+    }
+
+    @Override
+    protected void handleOversizedMessage(ChannelHandlerContext ctx, HttpMessage oversized) throws Exception {
+        LOGGER.warn("Oversized HTTP message received, exceeds maxContentLength <{}>", maxContentLength());
+        super.handleOversizedMessage(ctx, oversized);
+    }
+
+}