1 /*
2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package jdk.incubator.http;
27
28 import java.io.IOException;
29 import java.net.InetSocketAddress;
30 import java.net.URI;
31 import java.util.Base64;
32 import java.util.Collections;
33 import java.util.HashMap;
34 import java.util.HashSet;
35 import java.util.Map;
36 import java.util.Set;
37 import java.util.concurrent.ConcurrentHashMap;
38
39 import jdk.incubator.http.internal.common.Utils;
40 import jdk.incubator.http.internal.frame.SettingsFrame;
41 import static jdk.incubator.http.internal.frame.SettingsFrame.INITIAL_WINDOW_SIZE;
42 import static jdk.incubator.http.internal.frame.SettingsFrame.ENABLE_PUSH;
43 import static jdk.incubator.http.internal.frame.SettingsFrame.HEADER_TABLE_SIZE;
44 import static jdk.incubator.http.internal.frame.SettingsFrame.MAX_CONCURRENT_STREAMS;
45 import static jdk.incubator.http.internal.frame.SettingsFrame.MAX_FRAME_SIZE;
46
47 /**
48 * Http2 specific aspects of HttpClientImpl
49 */
50 class Http2ClientImpl {
51
52 private final HttpClientImpl client;
53
54 Http2ClientImpl(HttpClientImpl client) {
55 this.client = client;
56 }
57
58 /* Map key is "scheme:host:port" */
59 private final Map<String,Http2Connection> connections = new ConcurrentHashMap<>();
60
61 private final Set<String> opening = Collections.synchronizedSet(new HashSet<>());
62
63 boolean haveConnectionFor(URI uri, InetSocketAddress proxy) {
64 return connections.containsKey(Http2Connection.keyFor(uri,proxy));
65 }
66
67 /**
68 * If a https request then blocks and waits until a connection is opened.
69 * Returns null if the request is 'http' as a different (upgrade)
70 * mechanism is used.
71 *
72 * Only one connection per destination is created. Blocks when opening
73 * connection, or when waiting for connection to be opened.
74 * First thread opens the connection and notifies the others when done.
75 *
76 * If the request is secure (https) then we open the connection here.
77 * If not, then the more complicated upgrade from 1.1 to 2 happens (not here)
78 * In latter case, when the Http2Connection is connected, putConnection() must
79 * be called to store it.
80 */
81 Http2Connection getConnectionFor(HttpRequestImpl req)
82 throws IOException, InterruptedException {
83 URI uri = req.uri();
84 InetSocketAddress proxy = req.proxy(client);
85 String key = Http2Connection.keyFor(uri, proxy);
86 Http2Connection connection = connections.get(key);
87 if (connection != null) { // fast path if connection already exists
88 return connection;
89 }
90 synchronized (opening) {
91 while ((connection = connections.get(key)) == null) {
92 if (!req.secure()) {
93 return null;
94 }
95 if (!opening.contains(key)) {
96 opening.add(key);
97 break;
98 } else {
99 opening.wait();
100 }
101 }
102 }
103 if (connection != null) {
104 return connection;
105 }
106 // we are opening the connection here blocking until it is done.
107 try {
108 connection = new Http2Connection(req, this);
109 } catch (Throwable t) {
110 synchronized (opening) {
111 opening.remove(key);
112 opening.notifyAll();
113 }
114 throw t;
115 }
116 synchronized (opening) {
117 connections.put(key, connection);
118 opening.remove(key);
119 opening.notifyAll();
120 }
121 return connection;
122 }
123
124
125 /*
126 * TODO: If there isn't a connection to the same destination, then
127 * store it. If there is already a connection, then close it
128 */
129 void putConnection(Http2Connection c) {
130 connections.put(c.key(), c);
131 }
132
133 void deleteConnection(Http2Connection c) {
134 connections.remove(c.key());
135 }
136
137 HttpClientImpl client() {
138 return client;
139 }
140
141 /** Returns the client settings as a base64 (url) encoded string */
142 String getSettingsString() {
143 SettingsFrame sf = getClientSettings();
144 byte[] settings = sf.toByteArray(); // without the header
145 Base64.Encoder encoder = Base64.getUrlEncoder()
146 .withoutPadding();
147 return encoder.encodeToString(settings);
148 }
149
150 private static final int K = 1024;
151
152 SettingsFrame getClientSettings() {
153 SettingsFrame frame = new SettingsFrame();
154 frame.setParameter(HEADER_TABLE_SIZE, Utils.getIntegerNetProperty(
155 "jdk.httpclient.hpack.maxheadertablesize", 16 * K));
156 frame.setParameter(ENABLE_PUSH, Utils.getIntegerNetProperty(
157 "jdk.httpclient.enablepush", 1));
158 frame.setParameter(MAX_CONCURRENT_STREAMS, Utils.getIntegerNetProperty(
159 "jdk.httpclient.maxstreams", 16));
160 frame.setParameter(INITIAL_WINDOW_SIZE, Utils.getIntegerNetProperty(
161 "jdk.httpclient.windowsize", 64 * K - 1));
162 frame.setParameter(MAX_FRAME_SIZE, Utils.getIntegerNetProperty(
163 "jdk.httpclient.maxframesize", 16 * K));
164 return frame;
165 }
166 }