/*

 * 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

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 * questions.

 */

/*

 * @test

 * @summary Test for cookie handling when redirecting

 * @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

 *       RedirectWithCookie

 */

import com.sun.net.httpserver.HttpServer;

import com.sun.net.httpserver.HttpsConfigurator;

import com.sun.net.httpserver.HttpsServer;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.CookieManager;

import java.net.InetAddress;

import java.net.InetSocketAddress;

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.List;

import javax.net.ssl.SSLContext;

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 static java.lang.System.out;

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

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertTrue;

public class RedirectWithCookie implements HttpServerAdapters {

    SSLContext sslContext;

    HttpTestServer httpTestServer;        // HTTP/1.1    [ 4 servers ]

    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 = "BasicRedirectTest message body";

    static final int ITERATIONS = 3;

    @DataProvider(name = "positive")

    public Object[][] positive() {

        return new Object[][] {

                { httpURI,    },

                { httpsURI,   },

                { http2URI,   },

                { https2URI,  },

        };

    }

    @Test(dataProvider = "positive")

    void test(String uriString) throws Exception {

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

        HttpClient client = HttpClient.newBuilder()

                .followRedirects(Redirect.ALWAYS)

                .cookieHandler(new CookieManager())

                .sslContext(sslContext)

                .build();

        assert client.cookieHandler().isPresent();

        URI uri = URI.create(uriString);

        HttpRequest request = HttpRequest.newBuilder(uri).build();

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

        for (int i=0; i< ITERATIONS; i++) {

            out.println("iteration: " + i);

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

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

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

            assertEquals(response.statusCode(), 200);

            assertEquals(response.body(), MESSAGE);

            // asserts redirected URI in response.request().uri()

            assertTrue(response.uri().getPath().endsWith("message"));

            assertPreviousRedirectResponses(request, response);

        }

    }

    static void assertPreviousRedirectResponses(HttpRequest initialRequest,

                                                HttpResponse<?> finalResponse) {

        // there must be at least one previous response

        finalResponse.previousResponse()

                .orElseThrow(() -> new RuntimeException("no previous response"));

        HttpResponse<?> response = finalResponse;

        do {

            URI uri = response.uri();

            response = response.previousResponse().get();

            assertTrue(300 <= response.statusCode() && response.statusCode() <= 309,

                    "Expected 300 <= code <= 309, got:" + response.statusCode());

            assertEquals(response.body(), null, "Unexpected body: " + response.body());

            String locationHeader = response.headers().firstValue("Location")

                    .orElseThrow(() -> new RuntimeException("no previous Location"));

            assertTrue(uri.toString().endsWith(locationHeader),

                    "URI: " + uri + ", Location: " + locationHeader);

        } while (response.previousResponse().isPresent());

        // initial

        assertEquals(initialRequest, response.request(),

                String.format("Expected initial request [%s] to equal last prev req [%s]",

                        initialRequest, response.request()));

    }

    // -- 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 CookieRedirectHandler(), "/http1/cookie/");

        httpURI = "http://" + httpTestServer.serverAuthority() + "/http1/cookie/redirect";

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

        httpsServer.setHttpsConfigurator(new HttpsConfigurator(sslContext));

        httpsTestServer = HttpTestServer.of(httpsServer);

        httpsTestServer.addHandler(new CookieRedirectHandler(),"/https1/cookie/");

        httpsURI = "https://" + httpsTestServer.serverAuthority() + "/https1/cookie/redirect";

        http2TestServer.addHandler(new CookieRedirectHandler(), "/http2/cookie/");

        http2URI = "http://" + http2TestServer.serverAuthority() + "/http2/cookie/redirect";

        https2TestServer.addHandler(new CookieRedirectHandler(), "/https2/cookie/");

        https2URI = "https://" + https2TestServer.serverAuthority() + "/https2/cookie/redirect";

        httpTestServer.start();

        httpsTestServer.start();

        http2TestServer.start();

        https2TestServer.start();

    }

    @AfterTest

    public void teardown() throws Exception {

        httpTestServer.stop();

        httpsTestServer.stop();

        http2TestServer.stop();

        https2TestServer.stop();

    }

    static class CookieRedirectHandler implements HttpTestHandler {

        @Override

        public void handle(HttpTestExchange t) throws IOException {

            System.out.println("CookieRedirectHandler for: " + t.getRequestURI());

            readAllRequestData(t);

            // redirecting

            if (t.getRequestURI().getPath().endsWith("redirect")) {

                String url = t.getRequestURI().resolve("message").toString();

                t.getResponseHeaders().addHeader("Location", url);

                t.getResponseHeaders().addHeader("Set-Cookie",

                                                 "CUSTOMER=WILE_E_COYOTE");

                t.sendResponseHeaders(302, 0);

                return;

            }

            // not redirecting

            try (OutputStream os = t.getResponseBody()) {

                List<String> cookie = t.getRequestHeaders().get("Cookie");

                if (cookie == null || cookie.size() == 0) {

                    String msg = "No cookie header present";

                    (new RuntimeException(msg)).printStackTrace();

                    t.sendResponseHeaders(500, -1);

                    os.write(msg.getBytes(UTF_8));

                } else if (!cookie.get(0).equals("CUSTOMER=WILE_E_COYOTE")) {

                    String msg = "Incorrect cookie header value:[" + cookie.get(0) + "]";

                    (new RuntimeException(msg)).printStackTrace();

                    t.sendResponseHeaders(500, -1);

                    os.write(msg.getBytes(UTF_8));

                } else {

                    assert cookie.get(0).equals("CUSTOMER=WILE_E_COYOTE");

                    byte[] bytes = MESSAGE.getBytes(UTF_8);

                    t.sendResponseHeaders(200, bytes.length);

                    os.write(bytes);

                }

            }

        }

    }

    static void readAllRequestData(HttpTestExchange t) throws IOException {

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

            is.readAllBytes();

        }

    }

}