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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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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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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
 * @summary Preserve URI component escaped octets when converting to HTTP headers
 * @bug 8198716
 * @library /test/lib /test/jdk/java/net/httpclient/lib
 * @build jdk.httpclient.test.lib.http2.Http2TestServer jdk.test.lib.net.SimpleSSLContext
 * @run testng/othervm
 *       -Djdk.httpclient.HttpClient.log=reqeusts,headers
 *       EscapedOctetsInURI
 */

import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.URI;
import javax.net.ssl.SSLContext;
import java.net.http.HttpClient;
import java.net.http.HttpClient.Version;
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.List;

import jdk.httpclient.test.lib.common.HttpServerAdapters;
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 static java.lang.System.err;
import static java.lang.System.out;
import static java.net.http.HttpClient.Version.HTTP_1_1;
import static java.net.http.HttpClient.Version.HTTP_2;
import static java.nio.charset.StandardCharsets.US_ASCII;
import static java.net.http.HttpClient.Builder.NO_PROXY;
import static org.testng.Assert.assertEquals;

public class EscapedOctetsInURI 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;

    private volatile HttpClient sharedClient;

    static final String[][] pathsAndQueryStrings = new String[][] {
        // partial-path       URI query
        {  "/001/noSpace", "?noQuotedOctets" },
        {  "/002/noSpace", "?name=chegar,address=Dublin%20Ireland", },
        {  "/003/noSpace", "?target=http%3A%2F%2Fwww.w3.org%2Fns%2Foa%23hasBody" },

        {  "/010/with%20space", "?noQuotedOctets" },
        {  "/011/with%20space", "?name=chegar,address=Dublin%20Ireland" },
        {  "/012/with%20space", "?target=http%3A%2F%2Fwww.w3.org%2Fns%2Foa%23hasBody" },
    };

    @DataProvider(name = "variants")
    public Object[][] variants() {
        List<Object[]> list = new ArrayList<>();

        for (boolean sameClient : new boolean[] { false, true }) {
            Arrays.asList(pathsAndQueryStrings).stream()
                    .map(e -> new Object[] {httpURI + e[0] + e[1], sameClient})
                    .forEach(list::add);
            Arrays.asList(pathsAndQueryStrings).stream()
                    .map(e -> new Object[] {httpsURI + e[0] + e[1], sameClient})
                    .forEach(list::add);
            Arrays.asList(pathsAndQueryStrings).stream()
                    .map(e -> new Object[] {http2URI + e[0] + e[1], sameClient})
                    .forEach(list::add);
            Arrays.asList(pathsAndQueryStrings).stream()
                    .map(e -> new Object[] {https2URI + e[0] + e[1], sameClient})
                    .forEach(list::add);
        }
        return list.stream().toArray(Object[][]::new);
    }

    static final int ITERATION_COUNT = 3; // checks upgrade and re-use

    static final long start = System.nanoTime();
    public static String now() {
        long now = System.nanoTime() - start;
        long secs = now / 1000_000_000;
        long mill = (now % 1000_000_000) / 1000_000;
        long nan = now % 1000_000;
        return String.format("[%d s, %d ms, %d ns] ", secs, mill, nan);
    }

    static Version version(String uri) {
        if (uri.contains("/http1/") || uri.contains("/https1/"))
            return HTTP_1_1;
        if (uri.contains("/http2/") || uri.contains("/https2/"))
            return HTTP_2;
        return null;
    }


    private HttpClient makeNewClient() {
        return HttpClient.newBuilder()
                .proxy(NO_PROXY)
                .sslContext(sslContext)
                .build();
    }

    HttpClient newHttpClient(boolean share) {
        if (!share) return makeNewClient();
        HttpClient shared = sharedClient;
        if (shared != null) return shared;
        synchronized (this) {
            shared = sharedClient;
            if (shared == null) {
                shared = sharedClient = makeNewClient();
            }
            return shared;
        }
    }

    record CloseableClient(HttpClient client, boolean shared)
            implements Closeable {
        public void close() {
            if (shared) return;
            client.close();
        }
    }

    @Test(dataProvider = "variants")
    void test(String uriString, boolean sameClient) throws Exception {
        System.out.println("\n--- Starting ");

        // The single-argument factory requires any illegal characters in its
        // argument to be quoted and preserves any escaped octets and other
        // characters that are present.
        URI uri = URI.create(uriString);

        HttpClient client = null;
        for (int i=0; i< ITERATION_COUNT; i++) {
            if (!sameClient || client == null) {
                client = newHttpClient(sameClient);
            }

            try (var cl = new CloseableClient(client, sameClient)) {
                HttpRequest request = HttpRequest.newBuilder(uri).build();
                HttpResponse<String> resp = client.send(request, BodyHandlers.ofString());

                out.println("Got response: " + resp);
                out.println("Got body: " + resp.body());
                assertEquals(resp.statusCode(), 200,
                        "Expected 200, got:" + resp.statusCode());

                // the response body should contain the exact escaped request URI
                URI retrievedURI = URI.create(resp.body());
                assertEquals(retrievedURI.getRawPath(), uri.getRawPath());
                assertEquals(retrievedURI.getRawQuery(), uri.getRawQuery());
                assertEquals(resp.version(), version(uriString));
            }
        }
    }

    @Test(dataProvider = "variants")
    void testAsync(String uriString, boolean sameClient) throws Exception {
        System.out.println("\n--- Starting ");
        URI uri = URI.create(uriString);

        HttpClient client = null;
        for (int i=0; i< ITERATION_COUNT; i++) {
            if (!sameClient || client == null) {
                client = newHttpClient(sameClient);
            }

            try (var cl = new CloseableClient(client, sameClient)) {
                HttpRequest request = HttpRequest.newBuilder(uri).build();
                client.sendAsync(request, BodyHandlers.ofString())
                        .thenApply(response -> {
                            out.println("Got response: " + response);
                            out.println("Got body: " + response.body());
                            assertEquals(response.statusCode(), 200);
                            assertEquals(response.version(), version(uriString));
                            return response.body();
                        })
                        .thenApply(body -> URI.create(body))
                        .thenAccept(retrievedURI -> {
                            // the body should contain the exact escaped request URI
                            assertEquals(retrievedURI.getRawPath(), uri.getRawPath());
                            assertEquals(retrievedURI.getRawQuery(), uri.getRawQuery());
                        }).join();
            }
        }
    }

    @BeforeTest
    public void setup() throws Exception {
        out.println(now() + "begin setup");

        sslContext = new SimpleSSLContext().get();
        if (sslContext == null)
            throw new AssertionError("Unexpected null sslContext");

        InetSocketAddress sa = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);
        httpTestServer = HttpTestServer.create(HTTP_1_1);
        httpTestServer.addHandler(new HttpASCIIUriStringHandler(), "/http1/get");
        httpURI = "http://" + httpTestServer.serverAuthority() + "/http1/get";

        httpsTestServer = HttpTestServer.create(HTTP_1_1, sslContext);
        httpsTestServer.addHandler(new HttpASCIIUriStringHandler(), "/https1/get");
        httpsURI = "https://" + httpsTestServer.serverAuthority() + "/https1/get";

        http2TestServer = HttpTestServer.create(HTTP_2);
        http2TestServer.addHandler(new HttpASCIIUriStringHandler(), "/http2/get");
        http2URI = "http://" + http2TestServer.serverAuthority() + "/http2/get";

        https2TestServer = HttpTestServer.create(HTTP_2, sslContext);
        https2TestServer.addHandler(new HttpASCIIUriStringHandler(), "/https2/get");
        https2URI = "https://" + https2TestServer.serverAuthority() + "/https2/get";

        err.println(now() + "Starting servers");
        httpTestServer.start();
        httpsTestServer.start();
        http2TestServer.start();
        https2TestServer.start();

        out.println("HTTP/1.1 server (http) listening at: " + httpTestServer.serverAuthority());
        out.println("HTTP/1.1 server (TLS)  listening at: " + httpsTestServer.serverAuthority());
        out.println("HTTP/2   server (h2c)  listening at: " + http2TestServer.serverAuthority());
        out.println("HTTP/2   server (h2)   listening at: " + https2TestServer.serverAuthority());

        out.println(now() + "setup done");
        err.println(now() + "setup done");
    }

    @AfterTest
    public void teardown() throws Exception {
        sharedClient.close();
        httpTestServer.stop();
        httpsTestServer.stop();
        http2TestServer.stop();
        https2TestServer.stop();
    }

    /** A handler that returns as its body the exact escaped request URI. */
    static class HttpASCIIUriStringHandler implements HttpTestHandler {
        @Override
        public void handle(HttpTestExchange t) throws IOException {
            String asciiUriString = t.getRequestURI().toASCIIString();
            out.println("HttpASCIIUriString received, asciiUriString: " + asciiUriString);
            try (InputStream is = t.getRequestBody();
                 OutputStream os = t.getResponseBody()) {
                is.readAllBytes();
                byte[] bytes = asciiUriString.getBytes(US_ASCII);
                t.sendResponseHeaders(200, bytes.length);
                os.write(bytes);
            }
        }
    }
}