Explicitly set Host header when using LocalHttpClientTransport

Closes gh-45028

Author: mhalbritter

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/transport/HttpClientTransport.java

@@ -35,6 +35,7 @@
 import org.apache.hc.core5.http.Header;
 import org.apache.hc.core5.http.HttpEntity;
 import org.apache.hc.core5.http.HttpHost;
+import org.apache.hc.core5.http.HttpRequest;
 import org.apache.hc.core5.http.io.entity.AbstractHttpEntity;
 
 import org.springframework.boot.buildpack.platform.io.Content;
@@ -156,6 +157,7 @@ private Response execute(HttpUriRequestBase request, String registryAuth) {
 
 	private Response execute(HttpUriRequest request) {
 		try {
+			beforeExecute(request);
 			ClassicHttpResponse response = this.client.executeOpen(this.host, request, null);
 			int statusCode = response.getCode();
 			if (statusCode >= 400 && statusCode <= 500) {
@@ -173,6 +175,9 @@ private Response execute(HttpUriRequest request) {
 		}
 	}
 
+	protected void beforeExecute(HttpRequest request) {
+	}
+
 	private byte[] readContent(ClassicHttpResponse response) throws IOException {
 		HttpEntity entity = response.getEntity();
 		if (entity == null) {

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/transport/LocalHttpClientTransport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,7 @@
 import org.apache.hc.client5.http.routing.HttpRoutePlanner;
 import org.apache.hc.client5.http.ssl.TlsSocketStrategy;
 import org.apache.hc.core5.http.HttpHost;
+import org.apache.hc.core5.http.HttpRequest;
 import org.apache.hc.core5.http.config.Lookup;
 import org.apache.hc.core5.http.protocol.HttpContext;
 import org.apache.hc.core5.util.TimeValue;
@@ -62,6 +63,11 @@ private LocalHttpClientTransport(HttpClient client, HttpHost host) {
 		super(client, host);
 	}
 
+	@Override
+	protected void beforeExecute(HttpRequest request) {
+		request.setHeader("Host", LOCAL_DOCKER_HOST.toHostString());
+	}
+
 	static LocalHttpClientTransport create(ResolvedDockerHost dockerHost) {
 		HttpClientBuilder builder = HttpClients.custom()
 			.setConnectionManager(new LocalConnectionManager(dockerHost))