jdk-24/jdk/test/java/net/httpclient/ImmutableHeaders.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is free software; you can redistribute it and/or modify it
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 * 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.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/**
 * @test
 * @bug 8087112
 * @run main/othervm ImmutableHeaders
 * @summary ImmutableHeaders
 */

import com.sun.net.httpserver.HttpContext;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.Headers;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.PasswordAuthentication;
import java.net.URI;
import java.net.http.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.List;
import static java.nio.charset.StandardCharsets.US_ASCII;

public class ImmutableHeaders {

    final static String RESPONSE = "Hello world";

    public static void main(String[] args) throws Exception {
        HttpServer server = HttpServer.create(new InetSocketAddress(0), 10);
        ExecutorService e = Executors.newCachedThreadPool();
        Handler h = new Handler();
        HttpContext serverContext = server.createContext("/test", h);
        int port = server.getAddress().getPort();
        System.out.println("Server port = " + port);

        server.setExecutor(e);
        server.start();
        HttpClient client = HttpClient.create()
                                      .build();

        try {
            URI uri = new URI("http://127.0.0.1:" + Integer.toString(port) + "/test/foo");
            HttpRequest req = client.request(uri)
                .headers("X-Foo", "bar")
                .headers("X-Bar", "foo")
                .GET();

            try {
                HttpHeaders hd = req.headers();
                List<String> v = hd.allValues("X-Foo");
                if (!v.get(0).equals("bar"))
                    throw new RuntimeException("Test failed");
                v.add("XX");
                throw new RuntimeException("Test failed");
            } catch (UnsupportedOperationException ex) {
            }
            HttpResponse resp = req.response();
            try {
                HttpHeaders hd = resp.headers();
                List<String> v = hd.allValues("X-Foo-Response");
                if (!v.get(0).equals("resp"))
                    throw new RuntimeException("Test failed");
                v.add("XX");
                throw new RuntimeException("Test failed");
            } catch (UnsupportedOperationException ex) {
            }

        } finally {
            client.executorService().shutdownNow();
            server.stop(0);
            e.shutdownNow();
        }
        System.out.println("OK");
    }

   static class Handler implements HttpHandler {

        @Override
        public void handle(HttpExchange he) throws IOException {
            String method = he.getRequestMethod();
            InputStream is = he.getRequestBody();
            Headers h = he.getResponseHeaders();
            h.add("X-Foo-Response", "resp");
            he.sendResponseHeaders(200, RESPONSE.length());
            OutputStream os = he.getResponseBody();
            os.write(RESPONSE.getBytes(US_ASCII));
            os.close();
        }

   }
}