test/jdk/com/sun/net/httpserver/HttpServerTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/**
 * @test
 * @bug 8233185
 * @summary HttpServer.stop() blocks indefinitely when called on dispatch thread
 * @modules java.base/sun.net.www
 * @library /test/lib
 * @run main/othervm HttpServerTest
 */

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.util.concurrent.CountDownLatch;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import jdk.test.lib.net.URIBuilder;

public class HttpServerTest implements HttpHandler {
    private static final int HTTP_STATUS_CODE_OK = 200;
    private static CountDownLatch serverStopped = new CountDownLatch(1);
    private final HttpServer server;


    public HttpServerTest(HttpServer server) {
        this.server = server;
    }

    @Override
    public void handle(HttpExchange ex) throws IOException {

        sendHttpStatusCode(HTTP_STATUS_CODE_OK, ex);

        System.out.println("Stopping server ...");
        server.stop(0);
        serverStopped.countDown();
    }

    private void sendHttpStatusCode(int httpCode, HttpExchange ex) {
        try {
            ex.sendResponseHeaders(httpCode, 0);
            ex.close();
        } catch (IOException e) {
            throw new RuntimeException("Server couldn't send response: " + e, e);
        }
    }

    public static void main(String[] args) throws IOException, InterruptedException {
        HttpServer server = HttpServer.create(
                new InetSocketAddress(InetAddress.getLoopbackAddress(), 0), 0);

        try {
            server.createContext("/context", new HttpServerTest(server));
            server.start();

            URL url = URIBuilder.newBuilder()
                    .scheme("http")
                    .loopback()
                    .port(server.getAddress().getPort())
                    .path("/context")
                    .toURLUnchecked();

            HttpURLConnection urlc = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
            System.out.println("Client: Response code received: " + urlc.getResponseCode());
            InputStream is = urlc.getInputStream();
            is.readAllBytes();
            is.close();
        } finally {
            serverStopped.await();
            System.out.println("Server stopped as expected");
        }
    }
}