/* * Copyright (c) 2015, 2017, 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 jdk.incubator.http; import java.lang.System.Logger.Level; import java.net.InetSocketAddress; import java.net.URI; import java.util.Base64; import java.util.Collections; import java.util.HashSet; import java.util.HashMap; import java.util.Map; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.CompletableFuture; import jdk.incubator.http.internal.common.MinimalFuture; import jdk.incubator.http.internal.common.Utils; import jdk.incubator.http.internal.frame.SettingsFrame; import static jdk.incubator.http.internal.frame.SettingsFrame.INITIAL_WINDOW_SIZE; import static jdk.incubator.http.internal.frame.SettingsFrame.ENABLE_PUSH; import static jdk.incubator.http.internal.frame.SettingsFrame.HEADER_TABLE_SIZE; import static jdk.incubator.http.internal.frame.SettingsFrame.MAX_CONCURRENT_STREAMS; import static jdk.incubator.http.internal.frame.SettingsFrame.MAX_FRAME_SIZE; /** * Http2 specific aspects of HttpClientImpl */ class Http2ClientImpl { static final boolean DEBUG = Utils.DEBUG; // Revisit: temporary dev flag. final static System.Logger debug = Utils.getDebugLogger("Http2ClientImpl"::toString, DEBUG); private final HttpClientImpl client; Http2ClientImpl(HttpClientImpl client) { this.client = client; } /* Map key is "scheme:host:port" */ private final Map connections = new ConcurrentHashMap<>(); private final Set opening = Collections.synchronizedSet(new HashSet<>()); private final Map>> waiting = Collections.synchronizedMap(new HashMap<>()); private void addToWaiting(String key, CompletableFuture cf) { synchronized (waiting) { Set> waiters = waiting.get(key); if (waiters == null) { waiters = new HashSet<>(); waiting.put(key, waiters); } waiters.add(cf); } } // boolean haveConnectionFor(URI uri, InetSocketAddress proxy) { // return connections.containsKey(Http2Connection.keyFor(uri,proxy)); // } /** * If a https request then async waits until a connection is opened. * Returns null if the request is 'http' as a different (upgrade) * mechanism is used. * * Only one connection per destination is created. Blocks when opening * connection, or when waiting for connection to be opened. * First thread opens the connection and notifies the others when done. * * If the request is secure (https) then we open the connection here. * If not, then the more complicated upgrade from 1.1 to 2 happens (not here) * In latter case, when the Http2Connection is connected, putConnection() must * be called to store it. */ CompletableFuture getConnectionFor(HttpRequestImpl req) { URI uri = req.uri(); InetSocketAddress proxy = req.proxy(); String key = Http2Connection.keyFor(uri, proxy); synchronized (opening) { Http2Connection connection = connections.get(key); if (connection != null) { // fast path if connection already exists return CompletableFuture.completedFuture(connection); } if (!req.secure()) { return MinimalFuture.completedFuture(null); } if (!opening.contains(key)) { debug.log(Level.DEBUG, "Opening: %s", key); opening.add(key); } else { CompletableFuture cf = new MinimalFuture<>(); addToWaiting(key, cf); return cf; } } return Http2Connection .createAsync(req, this) .whenComplete((conn, t) -> { debug.log(Level.DEBUG, "waking up dependents with created connection"); synchronized (opening) { Set> waiters = waiting.remove(key); debug.log(Level.DEBUG, "Opening completed: %s", key); opening.remove(key); final Throwable cause = Utils.getCompletionCause(t); if (waiters == null) { debug.log(Level.DEBUG, "no dependent to wake up"); return; } else if (cause instanceof Http2Connection.ALPNException) { waiters.forEach((cf1) -> cf1.completeAsync(() -> null, client.theExecutor())); } else if (cause != null) { debug.log(Level.DEBUG, () -> "waking up dependants: failed: " + cause); waiters.forEach((cf1) -> cf1.completeExceptionally(cause)); } else { debug.log(Level.DEBUG, "waking up dependants: succeeded"); waiters.forEach((cf1) -> cf1.completeAsync(() -> conn, client.theExecutor())); } } }); } /* * TODO: If there isn't a connection to the same destination, then * store it. If there is already a connection, then close it */ void putConnection(Http2Connection c) { connections.put(c.key(), c); } void deleteConnection(Http2Connection c) { connections.remove(c.key()); } void stop() { debug.log(Level.DEBUG, "stopping"); connections.values().forEach(this::close); connections.clear(); } private void close(Http2Connection h2c) { try { h2c.close(); } catch (Throwable t) {} } HttpClientImpl client() { return client; } /** Returns the client settings as a base64 (url) encoded string */ String getSettingsString() { SettingsFrame sf = getClientSettings(); byte[] settings = sf.toByteArray(); // without the header Base64.Encoder encoder = Base64.getUrlEncoder() .withoutPadding(); return encoder.encodeToString(settings); } private static final int K = 1024; SettingsFrame getClientSettings() { SettingsFrame frame = new SettingsFrame(); frame.setParameter(HEADER_TABLE_SIZE, Utils.getIntegerNetProperty( "jdk.httpclient.hpack.maxheadertablesize", 16 * K)); frame.setParameter(ENABLE_PUSH, Utils.getIntegerNetProperty( "jdk.httpclient.enablepush", 1)); frame.setParameter(MAX_CONCURRENT_STREAMS, Utils.getIntegerNetProperty( "jdk.httpclient.maxstreams", 16)); frame.setParameter(INITIAL_WINDOW_SIZE, Utils.getIntegerNetProperty( "jdk.httpclient.windowsize", 64 * K - 1)); frame.setParameter(MAX_FRAME_SIZE, Utils.getIntegerNetProperty( "jdk.httpclient.maxframesize", 16 * K)); return frame; } }