--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/ImmutableHttpRequest.java	Fri Jun 15 15:16:52 2018 +0100
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.internal.net.http;
+
+import java.net.URI;
+import java.net.http.HttpHeaders;
+import java.net.http.HttpRequest;
+import java.time.Duration;
+import java.util.Objects;
+import java.util.Optional;
+import java.net.http.HttpClient.Version;
+import static jdk.internal.net.http.common.Utils.ALLOWED_HEADERS;
+
+final class ImmutableHttpRequest extends HttpRequest {
+
+    private final String method;
+    private final URI uri;
+    private final HttpHeaders headers;
+    private final Optional<BodyPublisher> requestPublisher;
+    private final boolean expectContinue;
+    private final Optional<Duration> timeout;
+    private final Optional<Version> version;
+
+    /** Creates an ImmutableHttpRequest from the given builder. */
+    ImmutableHttpRequest(HttpRequestBuilderImpl builder) {
+        this.method = Objects.requireNonNull(builder.method());
+        this.uri = Objects.requireNonNull(builder.uri());
+        this.headers = HttpHeaders.of(builder.headersBuilder().map(), ALLOWED_HEADERS);
+        this.requestPublisher = Optional.ofNullable(builder.bodyPublisher());
+        this.expectContinue = builder.expectContinue();
+        this.timeout = Optional.ofNullable(builder.timeout());
+        this.version = Objects.requireNonNull(builder.version());
+    }
+
+    @Override
+    public String method() { return method; }
+
+    @Override
+    public URI uri() { return uri; }
+
+    @Override
+    public HttpHeaders headers() {
+        return headers;
+    }
+
+    @Override
+    public Optional<BodyPublisher> bodyPublisher() { return requestPublisher; }
+
+    @Override
+    public boolean expectContinue() { return expectContinue; }
+
+    @Override
+    public Optional<Duration> timeout() { return timeout; }
+
+    @Override
+    public Optional<Version> version() { return version; }
+
+    @Override
+    public String toString() {
+        return uri.toString() + " " + method;
+    }
+}