/*

 * 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 8196965

 * @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

 * @build jdk.test.lib.Platform

 * @build jdk.test.lib.util.FileUtils

 * @run testng/othervm AsFileDownloadTest

 */

import com.sun.net.httpserver.HttpExchange;

import com.sun.net.httpserver.HttpHandler;

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.io.UncheckedIOException;

import java.net.InetSocketAddress;

import java.net.URI;

import java.net.http.HttpClient;

import java.net.http.HttpRequest;

import java.net.http.HttpRequest.BodyPublishers;

import java.net.http.HttpResponse;

import java.net.http.HttpResponse.BodyHandler;

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import javax.net.ssl.SSLContext;

import jdk.testlibrary.SimpleSSLContext;

import jdk.test.lib.util.FileUtils;

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.net.http.HttpResponse.BodyHandlers.ofFileDownload;

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

import static java.nio.file.StandardOpenOption.*;

import static org.testng.Assert.assertEquals;

import static org.testng.Assert.assertTrue;

import static org.testng.Assert.fail;

public class AsFileDownloadTest {

    SSLContext sslContext;

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

    HttpsServer httpsTestServer;       // HTTPS/1.1

    Http2TestServer http2TestServer;   // HTTP/2 ( h2c )

    Http2TestServer https2TestServer;  // HTTP/2 ( h2  )

    String httpURI;

    String httpsURI;

    String http2URI;

    String https2URI;

    Path tempDir;

    static final String[][] contentDispositionValues = new String[][] {

          // URI query     Content-Type header value         Expected filename

            { "001", "Attachment; filename=example001.html", "example001.html" },

            { "002", "attachment; filename=example002.html", "example002.html" },

            { "003", "ATTACHMENT; filename=example003.html", "example003.html" },

            { "004", "attAChment; filename=example004.html", "example004.html" },

            { "005", "attachmeNt; filename=example005.html", "example005.html" },

            { "006", "attachment; Filename=example006.html", "example006.html" },

            { "007", "attachment; FILENAME=example007.html", "example007.html" },

            { "008", "attachment; fileName=example008.html", "example008.html" },

            { "009", "attachment; fIlEnAMe=example009.html", "example009.html" },

            { "010", "attachment; filename=Example010.html", "Example010.html" },

            { "011", "attachment; filename=EXAMPLE011.html", "EXAMPLE011.html" },

            { "012", "attachment; filename=eXample012.html", "eXample012.html" },

            { "013", "attachment; filename=example013.HTML", "example013.HTML" },

            { "014", "attachment; filename  =eXaMpLe014.HtMl", "eXaMpLe014.HtMl"},

            { "015", "attachment; filename=a",               "a"               },

            { "016", "attachment; filename= b",              "b"               },

            { "017", "attachment; filename=  c",             "c"               },

            { "018", "attachment; filename=    d",           "d"               },

            { "019", "attachment; filename=e  ; filename*=utf-8''eee.txt",  "e"},

            { "020", "attachment; filename*=utf-8''fff.txt; filename=f",    "f"},

            { "021", "attachment;  filename=g",              "g"               },

            { "022", "attachment;   filename= h",            "h"               },

            { "023", "attachment; filename=\"space name\"",                       "space name" },

            { "024", "attachment; filename=me.txt; filename*=utf-8''you.txt",     "me.txt"     },

            { "025", "attachment; filename=\"m y.txt\"; filename*=utf-8''you.txt", "m y.txt"   },

            { "030", "attachment; filename=foo/file1.txt",        "file1.txt" },

            { "031", "attachment; filename=foo/bar/file2.txt",    "file2.txt" },

            { "032", "attachment; filename=baz\\file3.txt",       "file3.txt" },

            { "033", "attachment; filename=baz\\bar\\file4.txt",  "file4.txt" },

            { "034", "attachment; filename=x/y\\file5.txt",       "file5.txt" },

            { "035", "attachment; filename=x/y\\file6.txt",       "file6.txt" },

            { "036", "attachment; filename=x/y\\z/file7.txt",     "file7.txt" },

            { "037", "attachment; filename=x/y\\z/\\x/file8.txt", "file8.txt" },

            { "038", "attachment; filename=/root/file9.txt",      "file9.txt" },

            { "039", "attachment; filename=../file10.txt",        "file10.txt" },

            { "040", "attachment; filename=..\\file11.txt",       "file11.txt" },

            { "041", "attachment; filename=foo/../../file12.txt", "file12.txt" },

    };

    @DataProvider(name = "positive")

    public Object[][] positive() {

        List<Object[]> list = new ArrayList<>();

        Arrays.asList(contentDispositionValues).stream()

                .map(e -> new Object[] {httpURI +  "?" + e[0], e[1], e[2]})

                .forEach(list::add);

        Arrays.asList(contentDispositionValues).stream()

                .map(e -> new Object[] {httpsURI +  "?" + e[0], e[1], e[2]})

                .forEach(list::add);

        Arrays.asList(contentDispositionValues).stream()

                .map(e -> new Object[] {http2URI +  "?" + e[0], e[1], e[2]})

                .forEach(list::add);

        Arrays.asList(contentDispositionValues).stream()

                .map(e -> new Object[] {https2URI +  "?" + e[0], e[1], e[2]})

                .forEach(list::add);

        return list.stream().toArray(Object[][]::new);

    }

    @Test(dataProvider = "positive")

    void test(String uriString, String contentDispositionValue, String expectedFilename)

        throws Exception

    {

        out.printf("test(%s, %s, %s): starting", uriString, contentDispositionValue, expectedFilename);

        HttpClient client = HttpClient.newBuilder().sslContext(sslContext).build();

        URI uri = URI.create(uriString);

        HttpRequest request = HttpRequest.newBuilder(uri)

                .POST(BodyPublishers.ofString("May the luck of the Irish be with you!"))

                .build();

        BodyHandler bh = ofFileDownload(tempDir.resolve(uri.getPath().substring(1)),

                                        CREATE, TRUNCATE_EXISTING, WRITE);

        HttpResponse<Path> response = client.send(request, bh);

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

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

        String fileContents = new String(Files.readAllBytes(response.body()), UTF_8);

        out.println("Got body: " + fileContents);

        assertEquals(response.statusCode(),200);

        assertEquals(response.body().getFileName().toString(), expectedFilename);

        assertTrue(response.headers().firstValue("Content-Disposition").isPresent());

        assertEquals(response.headers().firstValue("Content-Disposition").get(),

                     contentDispositionValue);

        assertEquals(fileContents, "May the luck of the Irish be with you!");

    }

    // --- Negative

    static final String[][] contentDispositionBADValues = new String[][] {

            // URI query     Content-Type header value

            { "100", ""                                    },  // empty

            { "101", "filename=example.html"               },  // no attachment

            { "102", "attachment; filename=space name"     },  // unquoted with space

            { "103", "attachment; filename="               },  // empty filename param

            { "104", "attachment; filename=\""             },  // single quote

            { "105", "attachment; filename=\"\""           },  // empty quoted

            { "106", "attachment; filename=."              },  // dot

            { "107", "attachment; filename=.."             },  // dot dot

            { "108", "attachment; filename=\".."           },  // badly quoted dot dot

            { "109", "attachment; filename=\"..\""         },  // quoted dot dot

            { "110", "attachment; filename=\"bad"          },  // badly quoted

            { "111", "attachment; filename=\"bad;"         },  // badly quoted with ';'

            { "112", "attachment; filename=\"bad ;"        },  // badly quoted with ' ;'

            { "113", "attachment; filename*=utf-8''xx.txt "},  // no "filename" param

    };

    @DataProvider(name = "negative")

    public Object[][] negative() {

        List<Object[]> list = new ArrayList<>();

        Arrays.asList(contentDispositionBADValues).stream()

                .map(e -> new Object[] {httpURI +  "?" + e[0], e[1]})

                .forEach(list::add);

        Arrays.asList(contentDispositionBADValues).stream()

                .map(e -> new Object[] {httpsURI +  "?" + e[0], e[1]})

                .forEach(list::add);

        Arrays.asList(contentDispositionBADValues).stream()

                .map(e -> new Object[] {http2URI +  "?" + e[0], e[1]})

                .forEach(list::add);

        Arrays.asList(contentDispositionBADValues).stream()

                .map(e -> new Object[] {https2URI +  "?" + e[0], e[1]})

                .forEach(list::add);

        return list.stream().toArray(Object[][]::new);

    }

    @Test(dataProvider = "negative")

    void negativeTest(String uriString, String contentDispositionValue)

            throws Exception

    {

        out.printf("negativeTest(%s, %s): starting", uriString, contentDispositionValue);

        HttpClient client = HttpClient.newBuilder().sslContext(sslContext).build();

        URI uri = URI.create(uriString);

        HttpRequest request = HttpRequest.newBuilder(uri)

                .POST(BodyPublishers.ofString("Does not matter"))

                .build();

        BodyHandler bh = ofFileDownload(tempDir, CREATE, TRUNCATE_EXISTING, WRITE);

        try {

            HttpResponse<Path> response = client.send(request, bh);

            fail("UNEXPECTED response: " + response + ", path:" + response.body());

        } catch (UncheckedIOException | IOException ioe) {

            System.out.println("Caught expected: " + ioe);

        }

    }

    // -- Infrastructure

    @BeforeTest

    public void setup() throws Exception {

        tempDir = Paths.get("asFileDownloadTest.tmp.dir");

        Files.createDirectory(tempDir);

        // Unique dirs per test run, based on the URI path

        Files.createDirectories(tempDir.resolve("http1/afdt/"));

        Files.createDirectories(tempDir.resolve("https1/afdt/"));

        Files.createDirectories(tempDir.resolve("http2/afdt/"));

        Files.createDirectories(tempDir.resolve("https2/afdt/"));

        sslContext = new SimpleSSLContext().get();

        if (sslContext == null)

            throw new AssertionError("Unexpected null sslContext");

        InetSocketAddress sa = new InetSocketAddress(0);

        httpTestServer = HttpServer.create(sa, 0);

        httpTestServer.createContext("/http1/afdt", new Http1FileDispoHandler());

        httpURI = "http://127.0.0.1:" + httpTestServer.getAddress().getPort() + "/http1/afdt";

        httpsTestServer = HttpsServer.create(sa, 0);

        httpsTestServer.setHttpsConfigurator(new HttpsConfigurator(sslContext));

        httpsTestServer.createContext("/https1/afdt", new Http1FileDispoHandler());

        httpsURI = "https://127.0.0.1:" + httpsTestServer.getAddress().getPort() + "/https1/afdt";

        http2TestServer = new Http2TestServer("127.0.0.1", false, 0);

        http2TestServer.addHandler(new Http2FileDispoHandler(), "/http2/afdt");

        int port = http2TestServer.getAddress().getPort();

        http2URI = "http://127.0.0.1:" + port + "/http2/afdt";

        https2TestServer = new Http2TestServer("127.0.0.1", true, 0);

        https2TestServer.addHandler(new Http2FileDispoHandler(), "/https2/afdt");

        port = https2TestServer.getAddress().getPort();

        https2URI = "https://127.0.0.1:" + port + "/https2/afdt";

        httpTestServer.start();

        httpsTestServer.start();

        http2TestServer.start();

        https2TestServer.start();

    }

    @AfterTest

    public void teardown() throws Exception {

        httpTestServer.stop(0);

        httpsTestServer.stop(0);

        http2TestServer.stop();

        https2TestServer.stop();

    }

    static String contentDispositionValueFromURI(URI uri) {

        String queryIndex = uri.getQuery();

        String[][] values;

        if (queryIndex.startsWith("0"))  // positive tests start with '0'

            values = contentDispositionValues;

        else if (queryIndex.startsWith("1"))  // negative tests start with '1'

            values = contentDispositionBADValues;

        else

            throw new AssertionError("SERVER: UNEXPECTED query:" + queryIndex);

        return Arrays.asList(values).stream()

                .filter(e -> e[0].equals(queryIndex))

                .map(e -> e[1])

                .findFirst()

                .orElseThrow();

    }

    static class Http1FileDispoHandler implements HttpHandler {

        @Override

        public void handle(HttpExchange t) throws IOException {

            try (InputStream is = t.getRequestBody();

                 OutputStream os = t.getResponseBody()) {

                byte[] bytes = is.readAllBytes();

                t.getResponseHeaders().set("Content-Disposition",

                        contentDispositionValueFromURI(t.getRequestURI()));

                t.sendResponseHeaders(200, bytes.length);

                os.write(bytes);

            }

        }

    }

    static class Http2FileDispoHandler implements Http2Handler {

        @Override

        public void handle(Http2TestExchange t) throws IOException {

            try (InputStream is = t.getRequestBody();

                 OutputStream os = t.getResponseBody()) {

                byte[] bytes = is.readAllBytes();

                t.getResponseHeaders().addHeader("Content-Disposition",

                        contentDispositionValueFromURI(t.getRequestURI()));

                t.sendResponseHeaders(200, bytes.length);

                os.write(bytes);

            }

        }

    }

}