| /* |
| * Copyright (c) 2015, 2016, 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 java.net.http; |
| |
| import java.net.URI; |
| import java.time.Duration; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashMap; |
| import java.util.LinkedHashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeSet; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.TimeUnit; |
| |
| import static java.lang.String.format; |
| import static java.util.Objects.requireNonNull; |
| |
| final class WSBuilder implements WebSocket.Builder { |
| |
| private static final Set<String> FORBIDDEN_HEADERS = |
| new TreeSet<>(String.CASE_INSENSITIVE_ORDER); |
| |
| static { |
| List<String> headers = List.of("Connection", "Upgrade", |
| "Sec-WebSocket-Accept", "Sec-WebSocket-Extensions", |
| "Sec-WebSocket-Key", "Sec-WebSocket-Protocol", |
| "Sec-WebSocket-Version"); |
| FORBIDDEN_HEADERS.addAll(headers); |
| } |
| |
| private final URI uri; |
| private final HttpClient client; |
| private final LinkedHashMap<String, List<String>> headers = new LinkedHashMap<>(); |
| private final WebSocket.Listener listener; |
| private Collection<String> subprotocols = Collections.emptyList(); |
| private Duration timeout; |
| |
| WSBuilder(URI uri, HttpClient client, WebSocket.Listener listener) { |
| checkURI(requireNonNull(uri, "uri")); |
| requireNonNull(client, "client"); |
| requireNonNull(listener, "listener"); |
| this.uri = uri; |
| this.listener = listener; |
| this.client = client; |
| } |
| |
| @Override |
| public WebSocket.Builder header(String name, String value) { |
| requireNonNull(name, "name"); |
| requireNonNull(value, "value"); |
| if (FORBIDDEN_HEADERS.contains(name)) { |
| throw new IllegalArgumentException( |
| format("Header '%s' is used in the WebSocket Protocol", name)); |
| } |
| List<String> values = headers.computeIfAbsent(name, n -> new LinkedList<>()); |
| values.add(value); |
| return this; |
| } |
| |
| @Override |
| public WebSocket.Builder subprotocols(String mostPreferred, String... lesserPreferred) { |
| requireNonNull(mostPreferred, "mostPreferred"); |
| requireNonNull(lesserPreferred, "lesserPreferred"); |
| this.subprotocols = checkSubprotocols(mostPreferred, lesserPreferred); |
| return this; |
| } |
| |
| @Override |
| public WebSocket.Builder connectTimeout(Duration timeout) { |
| this.timeout = requireNonNull(timeout, "timeout"); |
| return this; |
| } |
| |
| @Override |
| public CompletableFuture<WebSocket> buildAsync() { |
| return WS.newInstanceAsync(this); |
| } |
| |
| private static URI checkURI(URI uri) { |
| String s = uri.getScheme(); |
| if (!("ws".equalsIgnoreCase(s) || "wss".equalsIgnoreCase(s))) { |
| throw new IllegalArgumentException |
| ("URI scheme not ws or wss (RFC 6455 3.): " + s); |
| } |
| String fragment = uri.getFragment(); |
| if (fragment != null) { |
| throw new IllegalArgumentException(format |
| ("Fragment not allowed in a WebSocket URI (RFC 6455 3.): '%s'", |
| fragment)); |
| } |
| return uri; |
| } |
| |
| URI getUri() { return uri; } |
| |
| HttpClient getClient() { return client; } |
| |
| Map<String, List<String>> getHeaders() { |
| LinkedHashMap<String, List<String>> copy = new LinkedHashMap<>(headers.size()); |
| headers.forEach((name, values) -> copy.put(name, new LinkedList<>(values))); |
| return copy; |
| } |
| |
| WebSocket.Listener getListener() { return listener; } |
| |
| Collection<String> getSubprotocols() { |
| return new ArrayList<>(subprotocols); |
| } |
| |
| Duration getConnectTimeout() { return timeout; } |
| |
| private static Collection<String> checkSubprotocols(String mostPreferred, |
| String... lesserPreferred) { |
| checkSubprotocolSyntax(mostPreferred, "mostPreferred"); |
| LinkedHashSet<String> sp = new LinkedHashSet<>(1 + lesserPreferred.length); |
| sp.add(mostPreferred); |
| for (int i = 0; i < lesserPreferred.length; i++) { |
| String p = lesserPreferred[i]; |
| String location = format("lesserPreferred[%s]", i); |
| requireNonNull(p, location); |
| checkSubprotocolSyntax(p, location); |
| if (!sp.add(p)) { |
| throw new IllegalArgumentException(format( |
| "Duplicate subprotocols (RFC 6455 4.1.): '%s'", p)); |
| } |
| } |
| return sp; |
| } |
| |
| private static void checkSubprotocolSyntax(String subprotocol, String location) { |
| if (subprotocol.isEmpty()) { |
| throw new IllegalArgumentException |
| ("Subprotocol name is empty (RFC 6455 4.1.): " + location); |
| } |
| if (!subprotocol.chars().allMatch(c -> 0x21 <= c && c <= 0x7e)) { |
| throw new IllegalArgumentException |
| ("Subprotocol name contains illegal characters (RFC 6455 4.1.): " |
| + location); |
| } |
| } |
| } |