8229235: com.sun.net.httpserver.HttpExchange should implement AutoCloseable

Reviewed-by: dfuchs, michaelm

src/jdk.httpserver/share/classes/com/sun/net/httpserver/HttpExchange.java

@@ -64,7 +64,7 @@ import java.util.*;
  * @since 1.6
  */
 
-public abstract class HttpExchange {
+public abstract class HttpExchange implements AutoCloseable {
 
     protected HttpExchange () {
     }

test/jdk/com/sun/net/httpserver/bugs/HttpExchange/AutoCloseableHttpExchange.java

@@ -0,0 +1,110 @@
+/*
+ * Copyright (c) 2019, 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.
+ */
+
+import com.sun.net.httpserver.*;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.*;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import jdk.test.lib.net.URIBuilder;
+import sun.net.httpserver.HttpExchangeAccess;
+
+
+/**
+ * @test
+ * @bug 8203036
+ * @library /test/lib
+ * @modules jdk.httpserver/sun.net.httpserver
+ * @build jdk.httpserver/sun.net.httpserver.HttpExchangeAccess AutoCloseableHttpExchange
+ * @run main/othervm AutoCloseableHttpExchange
+ * @summary Ensure that HttpExchange closes correctly when utilising the
+ * AutoCloseable interface e.g. both request InputStream and response OutputStream
+ * are closed, if not already.
+ */
+
+public class AutoCloseableHttpExchange {
+
+    static HttpServer testHttpServer;
+    static AtomicBoolean exchangeCloseFail = new AtomicBoolean(false);
+
+    static class Handler implements HttpHandler {
+        private CountDownLatch latch;
+
+        Handler(CountDownLatch latch) {
+            this.latch = latch;
+        }
+
+        public void handle(HttpExchange t) throws IOException {
+            InputStream is = t.getRequestBody();
+            try (HttpExchange e = t) {
+                while (is.read() != -1) ;
+                t.sendResponseHeaders(200, -1);
+            }
+            if (!HttpExchangeAccess.isClosed(t)) {
+                exchangeCloseFail.set(true);
+            }
+            latch.countDown();
+        }
+    }
+
+    static void connectAndCheck(String realm) throws Exception {
+        URL url = URIBuilder.newBuilder()
+                .scheme("http")
+                .loopback()
+                .port(testHttpServer.getAddress().getPort())
+                .path(realm)
+                .toURL();
+        HttpURLConnection testConnection = (HttpURLConnection) url.openConnection(Proxy.NO_PROXY);
+        InputStream is = testConnection.getInputStream();
+        while (is.read() != -1) ;
+        is.close();
+    }
+
+    public static void main(String[] args) throws Exception {
+        int CONNECTION_COUNT = 5;
+        CountDownLatch latch = new CountDownLatch(CONNECTION_COUNT);
+
+        InetSocketAddress addr = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);
+        testHttpServer = HttpServer.create(addr, 0);
+        testHttpServer.createContext("/test", new Handler(latch));
+
+        ExecutorService executor = Executors.newFixedThreadPool(CONNECTION_COUNT);
+        testHttpServer.setExecutor(executor);
+        testHttpServer.start();
+
+        while (CONNECTION_COUNT-- != 0) {
+            connectAndCheck("/test");
+        }
+        latch.await();
+        testHttpServer.stop(2);
+        executor.shutdown();
+
+        if (exchangeCloseFail.get())
+            throw new RuntimeException("The exchange was not closed properly");
+    }
+}

test/jdk/com/sun/net/httpserver/bugs/HttpExchange/jdk.httpserver/sun/net/httpserver/HttpExchangeAccess.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2019, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.net.httpserver;
+
+public class HttpExchangeAccess {
+    public static boolean isClosed(com.sun.net.httpserver.HttpExchange exch) {
+        synchronized (exch) {
+            return ((HttpExchangeImpl) exch).getExchangeImpl().closed;
+        }
+    }
+}