1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28 package org.apache.hc.core5.http2.impl.nio;
29
30 import org.apache.hc.core5.annotation.Contract;
31 import org.apache.hc.core5.annotation.Internal;
32 import org.apache.hc.core5.annotation.ThreadingBehavior;
33 import org.apache.hc.core5.http.URIScheme;
34 import org.apache.hc.core5.http.impl.nio.ClientHttp1IOEventHandler;
35 import org.apache.hc.core5.http.impl.nio.ClientHttp1StreamDuplexerFactory;
36 import org.apache.hc.core5.http.impl.nio.HttpConnectionEventHandler;
37 import org.apache.hc.core5.http.nio.ssl.TlsStrategy;
38 import org.apache.hc.core5.http2.HttpVersionPolicy;
39 import org.apache.hc.core5.http2.ssl.ApplicationProtocol;
40 import org.apache.hc.core5.reactor.EndpointParameters;
41 import org.apache.hc.core5.reactor.IOEventHandlerFactory;
42 import org.apache.hc.core5.reactor.ProtocolIOSession;
43 import org.apache.hc.core5.util.Args;
44 import org.apache.hc.core5.util.Timeout;
45
46
47
48
49
50
51
52
53 @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
54 @Internal
55 public class ClientHttpProtocolNegotiationStarter implements IOEventHandlerFactory {
56
57 private final ClientHttp1StreamDuplexerFactory http1StreamHandlerFactory;
58 private final ClientH2StreamMultiplexerFactory http2StreamHandlerFactory;
59 private final HttpVersionPolicy versionPolicy;
60 private final TlsStrategy tlsStrategy;
61 private final Timeout handshakeTimeout;
62
63 public ClientHttpProtocolNegotiationStarter(
64 final ClientHttp1StreamDuplexerFactory http1StreamHandlerFactory,
65 final ClientH2StreamMultiplexerFactory http2StreamHandlerFactory,
66 final HttpVersionPolicy versionPolicy,
67 final TlsStrategy tlsStrategy,
68 final Timeout handshakeTimeout) {
69 this.http1StreamHandlerFactory = Args.notNull(http1StreamHandlerFactory, "HTTP/1.1 stream handler factory");
70 this.http2StreamHandlerFactory = Args.notNull(http2StreamHandlerFactory, "HTTP/2 stream handler factory");
71 this.versionPolicy = versionPolicy != null ? versionPolicy : HttpVersionPolicy.NEGOTIATE;
72 this.tlsStrategy = tlsStrategy;
73 this.handshakeTimeout = handshakeTimeout;
74 }
75
76 @Override
77 public HttpConnectionEventHandler createHandler(final ProtocolIOSession ioSession, final Object attachment) {
78 HttpVersionPolicy endpointPolicy = versionPolicy;
79 if (attachment instanceof EndpointParameters) {
80 final EndpointParameters params = (EndpointParameters) attachment;
81 if (tlsStrategy != null && URIScheme.HTTPS.same(params.getScheme())) {
82 tlsStrategy.upgrade(ioSession, params, params.getAttachment(), handshakeTimeout, null);
83 }
84 if (params.getAttachment() instanceof HttpVersionPolicy) {
85 endpointPolicy = (HttpVersionPolicy) params.getAttachment();
86 }
87 }
88
89 ioSession.registerProtocol(ApplicationProtocol.HTTP_1_1.id, new ClientHttp1UpgradeHandler(http1StreamHandlerFactory));
90 ioSession.registerProtocol(ApplicationProtocol.HTTP_2.id, new ClientH2UpgradeHandler(http2StreamHandlerFactory));
91
92 switch (endpointPolicy) {
93 case FORCE_HTTP_2:
94 return new ClientH2PrefaceHandler(ioSession, http2StreamHandlerFactory, false);
95 case FORCE_HTTP_1:
96 return new ClientHttp1IOEventHandler(http1StreamHandlerFactory.create(ioSession));
97 default:
98 return new HttpProtocolNegotiator(ioSession, null);
99 }
100 }
101
102 }