2 * Copyright (c) 2024 PANTHEON.tech s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.netconf.transport.http;
10 import static java.util.Objects.requireNonNull;
12 import com.google.common.util.concurrent.ListenableFuture;
13 import io.netty.bootstrap.Bootstrap;
14 import io.netty.handler.codec.http.FullHttpRequest;
15 import io.netty.handler.codec.http.FullHttpResponse;
16 import org.opendaylight.netconf.transport.api.TransportChannelListener;
17 import org.opendaylight.netconf.transport.api.UnsupportedConfigurationException;
18 import org.opendaylight.netconf.transport.tcp.TCPClient;
19 import org.opendaylight.netconf.transport.tls.TLSClient;
20 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.http.client.rev240208.HttpClientGrouping;
21 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.http.client.rev240208.HttpClientStackGrouping;
22 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.http.client.rev240208.http.client.stack.grouping.transport.Tcp;
23 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.http.client.rev240208.http.client.stack.grouping.transport.Tls;
24 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.tcp.client.rev240208.TcpClientGrouping;
25 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.tls.client.rev240208.TlsClientGrouping;
28 * A {@link HTTPTransportStack} acting as a client.
30 public final class HTTPClient extends HTTPTransportStack {
32 private final RequestDispatcher dispatcher;
34 private HTTPClient(final TransportChannelListener listener, final HttpChannelInitializer channelInitializer,
35 final RequestDispatcher dispatcher) {
36 super(listener, channelInitializer);
37 this.dispatcher = dispatcher;
41 * Invokes the HTTP request over established connection.
43 * @param request the full http request object
44 * @return a future providing full http response or cause in case of error
46 public ListenableFuture<FullHttpResponse> invoke(final FullHttpRequest request) {
47 return dispatcher.dispatch(requireNonNull(request));
51 * Attempt to establish a {@link HTTPClient} by connecting to a remote address.
53 * @param listener {@link TransportChannelListener} to notify when the session is established
54 * @param bootstrap Client {@link Bootstrap} to use for the underlying Netty channel
55 * @param connectParams Connection parameters
56 * @param http2 indicates HTTP/2 protocol to be used
58 * @throws UnsupportedConfigurationException when {@code connectParams} contains an unsupported options
59 * @throws NullPointerException if any argument is {@code null}
61 public static ListenableFuture<HTTPClient> connect(final TransportChannelListener listener,
62 final Bootstrap bootstrap, final HttpClientStackGrouping connectParams, final boolean http2)
63 throws UnsupportedConfigurationException {
64 final HttpClientGrouping httpParams;
65 final TcpClientGrouping tcpParams;
66 final TlsClientGrouping tlsParams;
67 final var transport = requireNonNull(connectParams).getTransport();
68 if (transport instanceof Tcp tcp) {
69 httpParams = tcp.getTcp().getHttpClientParameters();
70 tcpParams = tcp.getTcp().nonnullTcpClientParameters();
72 } else if (transport instanceof Tls tls) {
73 httpParams = tls.getTls().getHttpClientParameters();
74 tcpParams = tls.getTls().nonnullTcpClientParameters();
75 tlsParams = tls.getTls().nonnullTlsClientParameters();
77 throw new UnsupportedConfigurationException("Unsupported transport: " + transport);
79 final var dispatcher = http2 ? new ClientHttp2RequestDispatcher() : new ClientHttp1RequestDispatcher();
80 final var client = new HTTPClient(listener, new ClientChannelInitializer(httpParams, dispatcher, http2),
82 final var underlay = tlsParams == null
83 ? TCPClient.connect(client.asListener(), bootstrap, tcpParams)
84 : TLSClient.connect(client.asListener(), bootstrap, tcpParams, new HttpSslHandlerFactory(tlsParams, http2));
85 return transformUnderlay(client, underlay);