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 * 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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 */

/*
 * @test
 * @bug 8240666
 * @summary Basic test for WebSocketHandshakeException
 * @library /test/lib /test/jdk/java/net/httpclient/lib
 * @build jdk.test.lib.net.SimpleSSLContext jdk.httpclient.test.lib.common.TestServerConfigurator
 * @modules java.net.http/jdk.internal.net.http.common
 *          jdk.httpserver
 * @run testng/othervm -Djdk.internal.httpclient.debug=true WSHandshakeExceptionTest
 */

import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.HttpsServer;
import com.sun.net.httpserver.HttpExchange;


import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.http.HttpClient;
import java.net.http.WebSocket;
import java.net.http.WebSocketHandshakeException;

import jdk.httpclient.test.lib.common.TestServerConfigurator;
import jdk.test.lib.net.SimpleSSLContext;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;
import javax.net.ssl.SSLContext;
import java.net.InetSocketAddress;
import java.net.URI;
import java.util.concurrent.CompletionException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import static java.net.http.HttpClient.Builder.NO_PROXY;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertNotNull;
import static org.testng.Assert.assertTrue;
import static org.testng.Assert.fail;
import static java.lang.System.out;

public class WSHandshakeExceptionTest {

    SSLContext sslContext;
    HttpServer httpTestServer;         // HTTP/1.1    [ 2 servers ]
    HttpsServer httpsTestServer;       // HTTPS/1.1
    String httpURI;
    String httpsURI;
    String httpNonUtf8URI;
    String httpsNonUtf8URI;
    HttpClient sharedClient;

    static final int ITERATION_COUNT = 4;
    // a shared executor helps reduce the amount of threads created by the test
    static final ExecutorService executor = Executors.newCachedThreadPool();

    @DataProvider(name = "variants")
    public Object[][] variants() {
        return new Object[][]{
                { httpURI,           false },
                { httpsURI,          false },
                { httpURI,           true  },
                { httpsURI,          true  },

                { httpNonUtf8URI,    true  },
                { httpsNonUtf8URI,   true  },
                { httpNonUtf8URI,    false },
                { httpsNonUtf8URI,   false }
        };
    }

    HttpClient newHttpClient() {
        return HttpClient.newBuilder()
                         .proxy(NO_PROXY)
                         .executor(executor)
                         .sslContext(sslContext)
                         .build();
    }

    @Test(dataProvider = "variants")
    public void test(String uri, boolean sameClient) {
        HttpClient client = sharedClient;
        boolean pause;
        for (int i = 0; i < ITERATION_COUNT; i++) {
            System.out.printf("iteration %s%n", i);
            if (!sameClient || client == null) {
                pause = client != null;
                client = newHttpClient();
                if (pause) gc(10); // give some time to gc
            }
            if (sharedClient == null) sharedClient = client;

            try {
                client.newWebSocketBuilder()
                      .buildAsync(URI.create(uri), new WebSocket.Listener() { })
                      .join();
                fail("Expected to throw");
            } catch (CompletionException ce) {
                Throwable t = getCompletionCause(ce);
                if (!(t instanceof WebSocketHandshakeException)) {
                    throw new AssertionError("Unexpected exception", t);
                }
                WebSocketHandshakeException wse = (WebSocketHandshakeException) t;
                assertNotNull(wse.getResponse());
                assertNotNull(wse.getResponse().body());
                assertEquals(wse.getResponse().body().getClass(), String.class);
                String body = (String)wse.getResponse().body();
                out.println("Status code is " + wse.getResponse().statusCode());
                out.println("Response is " + body);
                if(uri.contains("/nonutf8body")) {
                    // the invalid sequence 0xFF should have been replaced
                    // by the replacement character (U+FFFD)
                    assertTrue(body.equals("\ufffd"));
                }
                else {
                    // default HttpServer 404 body expected
                    assertTrue(body.contains("404"));
                }
                assertEquals(wse.getResponse().statusCode(), 404);
            }
        }
    }

    static void gc(long ms) {
        System.gc();
        try {
            Thread.sleep(ms);
        } catch (InterruptedException x) {
            // OK
        }
    }

    @BeforeTest
    public void setup() throws Exception {
        sslContext = new SimpleSSLContext().get();
        if (sslContext == null)
            throw new AssertionError("Unexpected null sslContext");

        // HTTP/1.1
        InetSocketAddress sa = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);
        httpTestServer = HttpServer.create(sa, 0);
        httpURI = "ws://localhost:" + httpTestServer.getAddress().getPort() + "/";
        httpNonUtf8URI = "ws://localhost:" + httpTestServer.getAddress().getPort() + "/nonutf8body";
        httpTestServer.createContext("/nonutf8body", new BodyHandler());

        httpsTestServer = HttpsServer.create(sa, 0);
        httpsTestServer.setHttpsConfigurator(new TestServerConfigurator(sa.getAddress(), sslContext));
        httpsURI = "wss://localhost:" + httpsTestServer.getAddress().getPort() + "/";
        httpsNonUtf8URI = "wss://localhost:" + httpsTestServer.getAddress().getPort() + "/nonutf8body";
        httpsTestServer.createContext("/nonutf8body", new BodyHandler());

        httpTestServer.start();
        httpsTestServer.start();
    }

    @AfterTest
    public void teardown() {
        sharedClient = null;
        gc(100);
        httpTestServer.stop(0);
        httpsTestServer.stop(0);
        executor.shutdownNow();
    }

    private static Throwable getCompletionCause(Throwable x) {
        if (!(x instanceof CompletionException)
                && !(x instanceof ExecutionException)) return x;
        final Throwable cause = x.getCause();
        if (cause == null) {
            throw new InternalError("Unexpected null cause", x);
        }
        return cause;
    }

    static class BodyHandler implements HttpHandler {

        @Override
        public void handle(HttpExchange e) throws IOException {
            try(InputStream is = e.getRequestBody();
                OutputStream os = e.getResponseBody()) {
                byte[] invalidUtf8 = {(byte)0xFF}; //Invalid utf-8 byte
                e.sendResponseHeaders(404, invalidUtf8.length);
                os.write(invalidUtf8);
            }
        }
    }
}