/*

 * 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.

 *

 * 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.

 */

/*

 * @test

 * @bug 8203433

 * @summary (httpclient) Add tests for HEAD and 304 responses.

 * @modules java.base/sun.net.www.http

 *          java.net.http/jdk.internal.net.http.common

 *          java.net.http/jdk.internal.net.http.frame

 *          java.net.http/jdk.internal.net.http.hpack

 *          java.logging

 *          jdk.httpserver

 * @library /lib/testlibrary /test/lib http2/server

 * @build Http2TestServer

 * @build jdk.testlibrary.SimpleSSLContext

 * @run testng/othervm

 *       -Djdk.httpclient.HttpClient.log=trace,headers,requests

 *       HeadTest

 */

import com.sun.net.httpserver.HttpServer;

import com.sun.net.httpserver.HttpsConfigurator;

import com.sun.net.httpserver.HttpsServer;

import jdk.testlibrary.SimpleSSLContext;

import org.testng.annotations.AfterTest;

import org.testng.annotations.BeforeTest;

import org.testng.annotations.DataProvider;

import org.testng.annotations.Test;

import javax.net.ServerSocketFactory;

import javax.net.ssl.SSLContext;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.io.Writer;

import java.net.InetAddress;

import java.net.InetSocketAddress;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.URI;

import java.net.http.HttpClient;

import java.net.http.HttpClient.Redirect;

import java.net.http.HttpRequest;

import java.net.http.HttpResponse;

import java.net.http.HttpResponse.BodyHandlers;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.StringTokenizer;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.ConcurrentLinkedQueue;

import java.util.concurrent.atomic.AtomicLong;

import java.util.stream.Collectors;

import java.util.stream.Stream;

import static java.lang.System.out;

import static java.nio.charset.StandardCharsets.UTF_8;

import static java.net.HttpURLConnection.HTTP_OK;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertTrue;

public class HeadTest implements HttpServerAdapters {

    SSLContext sslContext;

    HttpTestServer httpTestServer;        // HTTP/1.1

    HttpTestServer httpsTestServer;       // HTTPS/1.1

    HttpTestServer http2TestServer;       // HTTP/2 ( h2c )

    HttpTestServer https2TestServer;      // HTTP/2 ( h2  )

    String httpURI;

    String httpsURI;

    String http2URI;

    String https2URI;

    static final String MESSAGE = "Basic HeadTest message body";

    static final int ITERATIONS = 3;

    static final String CONTENT_LEN = "300";

    /*

     * NOT_MODIFIED status code results from a conditional GET where

     * the server does not (must not) return a response body because

     * the condition specified in the request disallows it

     */

    static final int HTTP_NOT_MODIFIED = 304;

    static final int HTTP_OK = 200;

    @DataProvider(name = "positive")

    public Object[][] positive() {

        return new Object[][] {

                { httpURI, "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_1_1  },

                { httpsURI, "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_1_1  },

                { httpURI, "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_2  },

                { httpsURI, "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_2  },

                { httpURI, "HEAD", HTTP_OK, HttpClient.Version.HTTP_1_1  },

                { httpsURI, "HEAD", HTTP_OK, HttpClient.Version.HTTP_1_1  },

                { httpURI, "HEAD", HTTP_OK, HttpClient.Version.HTTP_2  },

                { httpsURI, "HEAD", HTTP_OK, HttpClient.Version.HTTP_2  },

                { httpURI + "transfer/", "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_1_1  },

                { httpsURI + "transfer/", "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_1_1  },

                { httpURI + "transfer/", "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_2  },

                { httpsURI + "transfer/", "GET", HTTP_NOT_MODIFIED, HttpClient.Version.HTTP_2  },

                { httpURI + "transfer/", "HEAD", HTTP_OK, HttpClient.Version.HTTP_1_1  },

                { httpsURI + "transfer/", "HEAD", HTTP_OK, HttpClient.Version.HTTP_1_1  },

                { httpURI + "transfer/", "HEAD", HTTP_OK, HttpClient.Version.HTTP_2  },

                { httpsURI + "transfer/", "HEAD", HTTP_OK, HttpClient.Version.HTTP_2  }

        };

    }

    static final AtomicLong requestCounter = new AtomicLong();

    @Test(dataProvider = "positive")

    void test(String uriString, String method,

                        int expResp, HttpClient.Version version) throws Exception {

        out.printf("%n---- starting (%s) ----%n", uriString);

        HttpClient client = HttpClient.newBuilder()

                .followRedirects(Redirect.ALWAYS)

                .sslContext(sslContext)

                .build();

        URI uri = URI.create(uriString);

        HttpRequest.Builder requestBuilder = HttpRequest

                .newBuilder(uri)

                .method(method, HttpRequest.BodyPublishers.noBody());

        if (version != null) {

            requestBuilder.version(version);

        }

        HttpRequest request = requestBuilder.build();

        out.println("Initial request: " + request.uri());

        HttpResponse<String> response = client.send(request, BodyHandlers.ofString());

        out.println("  Got response: " + response);

        assertEquals(response.statusCode(), expResp);

        assertEquals(response.body(), "");

        assertEquals(response.headers().firstValue("Content-length").get(), CONTENT_LEN);

    }

    // -- Infrastructure

    @BeforeTest

    public void setup() throws Exception {

        sslContext = new SimpleSSLContext().get();

        if (sslContext == null)

            throw new AssertionError("Unexpected null sslContext");

        InetSocketAddress sa = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);

        httpTestServer = HttpTestServer.of(HttpServer.create(sa, 0));

        httpTestServer.addHandler(new HeadHandler(), "/");

        httpURI = "http://" + httpTestServer.serverAuthority() + "/";

        HttpsServer httpsServer = HttpsServer.create(sa, 0);

        httpsServer.setHttpsConfigurator(new HttpsConfigurator(sslContext));

        httpsTestServer = HttpTestServer.of(httpsServer);

        httpsTestServer.addHandler(new HeadHandler(),"/");

        httpsURI = "https://" + httpsTestServer.serverAuthority() + "/";

        http2TestServer = HttpTestServer.of(new Http2TestServer("localhost", false, 0));

        http2TestServer.addHandler(new HeadHandler(), "/");

        http2URI = "http://" + http2TestServer.serverAuthority() + "/";

        https2TestServer = HttpTestServer.of(new Http2TestServer("localhost", true, 0));

        https2TestServer.addHandler(new HeadHandler(), "/");

        https2URI = "https://" + https2TestServer.serverAuthority() + "/";

        httpTestServer.start();

        httpsTestServer.start();

        http2TestServer.start();

        https2TestServer.start();

    }

    @AfterTest

    public void teardown() throws Exception {

        httpTestServer.stop();

        httpsTestServer.stop();

        http2TestServer.stop();

        https2TestServer.stop();

    }

    static class HeadHandler implements HttpTestHandler {

        @Override

        public void handle(HttpTestExchange t) throws IOException {

            readAllRequestData(t); // shouldn't be any

            String method = t.getRequestMethod();

            String path = t.getRequestURI().getPath();

            HttpTestResponseHeaders rsph = t.getResponseHeaders();

            if (path.contains("transfer"))

                rsph.addHeader("Transfer-Encoding", "chunked");

            rsph.addHeader("Content-length", CONTENT_LEN);

            if (method.equals("HEAD")) {

                t.sendResponseHeaders(HTTP_OK, -1);

            } else if (method.equals("GET")) {

                t.sendResponseHeaders(HTTP_NOT_MODIFIED, -1);

            }

            t.close();

        }

    }

    static void readAllRequestData(HttpTestExchange t) throws IOException {

        try (InputStream is = t.getRequestBody()) {

            is.readAllBytes();

        }

    }

}