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1   /*
2    * ====================================================================
3    * Licensed to the Apache Software Foundation (ASF) under one
4    * or more contributor license agreements.  See the NOTICE file
5    * distributed with this work for additional information
6    * regarding copyright ownership.  The ASF licenses this file
7    * to you under the Apache License, Version 2.0 (the
8    * "License"); you may not use this file except in compliance
9    * with the License.  You may obtain a copy of the License at
10   *
11   *   http://www.apache.org/licenses/LICENSE-2.0
12   *
13   * Unless required by applicable law or agreed to in writing,
14   * software distributed under the License is distributed on an
15   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16   * KIND, either express or implied.  See the License for the
17   * specific language governing permissions and limitations
18   * under the License.
19   * ====================================================================
20   *
21   * This software consists of voluntary contributions made by many
22   * individuals on behalf of the Apache Software Foundation.  For more
23   * information on the Apache Software Foundation, please see
24   * <http://www.apache.org/>.
25   *
26   */
27  
28  package org.apache.hc.core5.http2.impl.nio;
29  
30  import java.io.IOException;
31  
32  import org.apache.hc.core5.annotation.Contract;
33  import org.apache.hc.core5.annotation.Internal;
34  import org.apache.hc.core5.annotation.ThreadingBehavior;
35  import org.apache.hc.core5.concurrent.FutureCallback;
36  import org.apache.hc.core5.http.impl.nio.ClientHttp1IOEventHandler;
37  import org.apache.hc.core5.http.impl.nio.ClientHttp1StreamDuplexerFactory;
38  import org.apache.hc.core5.reactor.ProtocolIOSession;
39  import org.apache.hc.core5.reactor.ProtocolUpgradeHandler;
40  import org.apache.hc.core5.util.Args;
41  
42  /**
43   * Protocol upgrade handler that upgrades the underlying {@link ProtocolIOSession}
44   * to HTTP/1.1 in case of a successful protocol negotiation or as a default fall-back.
45   *
46   * @since 5.2
47   */
48  @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
49  @Internal
50  public class ClientHttp1UpgradeHandler implements ProtocolUpgradeHandler {
51  
52      private final ClientHttp1StreamDuplexerFactory http1StreamHandlerFactory;
53  
54      public ClientHttp1UpgradeHandler(final ClientHttp1StreamDuplexerFactory http1StreamHandlerFactory) {
55          this.http1StreamHandlerFactory = Args.notNull(http1StreamHandlerFactory, "HTTP/1.1 stream handler factory");
56      }
57  
58      @Override
59      public void upgrade(final ProtocolIOSession ioSession, final FutureCallback<ProtocolIOSession> callback) {
60          final ClientHttp1IOEventHandler eventHandler = new ClientHttp1IOEventHandler(http1StreamHandlerFactory.create(ioSession));
61          ioSession.upgrade(eventHandler);
62          try {
63              eventHandler.connected(ioSession);
64              if (callback != null) {
65                  callback.completed(ioSession);
66              }
67          } catch (final IOException ex) {
68              eventHandler.exception(ioSession, ex);
69          }
70      }
71  
72  }