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ferenc-csaky pushed a commit to branch release-2.0
in repository https://gitbox.apache.org/repos/asf/flink.git
The following commit(s) were added to refs/heads/release-2.0 by this push:
new 4f6c733a80e [FLINK-39761][runtime] Set 'Connection: close' header in
`StaticFileServerHandler` when sending '304 Not Modified' responses
4f6c733a80e is described below
commit 4f6c733a80e1e0ee1f0a5d8f22ab21b7a9f61c52
Author: nattilabalint <[email protected]>
AuthorDate: Fri Jun 5 15:57:36 2026 +0200
[FLINK-39761][runtime] Set 'Connection: close' header in
`StaticFileServerHandler` when sending '304 Not Modified' responses
---
.../legacy/files/StaticFileServerHandler.java | 4 ++
.../legacy/files/StaticFileServerHandlerTest.java | 64 ++++++++++++++++++++++
2 files changed, 68 insertions(+)
diff --git
a/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandler.java
b/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandler.java
index 4454101d17c..71531b0a86d 100644
---
a/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandler.java
+++
b/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandler.java
@@ -45,6 +45,7 @@ import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.DefaultFullHtt
import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.DefaultHttpResponse;
import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.FullHttpResponse;
import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpChunkedInput;
+import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpHeaderNames;
import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpHeaderValues;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpRequest;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponse;
@@ -308,6 +309,9 @@ public class StaticFileServerHandler<T extends
RestfulGateway> extends LeaderRet
FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1,
NOT_MODIFIED);
setDateHeader(response);
+ // Explicitly notify the client that the connection will be dropped
+ response.headers().set(HttpHeaderNames.CONNECTION,
HttpHeaderValues.CLOSE);
+
// close the connection as soon as the error message is sent.
ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
}
diff --git
a/flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandlerTest.java
b/flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandlerTest.java
new file mode 100644
index 00000000000..ad7acaa549f
--- /dev/null
+++
b/flink-runtime/src/test/java/org/apache/flink/runtime/rest/handler/legacy/files/StaticFileServerHandlerTest.java
@@ -0,0 +1,64 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 org.apache.flink.runtime.rest.handler.legacy.files;
+
+import org.apache.flink.shaded.netty4.io.netty.channel.ChannelHandlerContext;
+import
org.apache.flink.shaded.netty4.io.netty.channel.ChannelInboundHandlerAdapter;
+import
org.apache.flink.shaded.netty4.io.netty.channel.embedded.EmbeddedChannel;
+import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.FullHttpResponse;
+import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpHeaderNames;
+import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpHeaderValues;
+import
org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class StaticFileServerHandlerTest {
+
+ @Test
+ void testSendNotModifiedIncludesConnectionCloseHeader() {
+ EmbeddedChannel channel =
+ new EmbeddedChannel(
+ new ChannelInboundHandlerAdapter() {
+ @Override
+ public void channelActive(ChannelHandlerContext
ctx) {
+ StaticFileServerHandler.sendNotModified(ctx);
+ }
+ });
+
+ FullHttpResponse response = channel.readOutbound();
+
+ assertThat(response).as("No response received!").isNotNull();
+
+ try {
+
assertThat(response.status()).isEqualTo(HttpResponseStatus.NOT_MODIFIED);
+
+ assertThat(response.headers().contains(HttpHeaderNames.CONNECTION))
+ .as("The 'Connection' header is missing!")
+ .isTrue();
+
+ assertThat(response.headers().get(HttpHeaderNames.CONNECTION))
+ .as("The value of 'Connection' header is not 'close'!")
+ .isEqualTo(HttpHeaderValues.CLOSE.toString());
+ } finally {
+ response.release();
+ }
+ }
+}
