001/*
002 * Copyright 2002-2017 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.web.socket.sockjs.client;
018
019import java.net.InetSocketAddress;
020import java.net.URI;
021import java.util.Collections;
022import java.util.List;
023
024import org.springframework.http.HttpHeaders;
025import org.springframework.http.MediaType;
026import org.springframework.util.Assert;
027import org.springframework.util.concurrent.SettableListenableFuture;
028import org.springframework.web.socket.CloseStatus;
029import org.springframework.web.socket.TextMessage;
030import org.springframework.web.socket.WebSocketExtension;
031import org.springframework.web.socket.WebSocketHandler;
032import org.springframework.web.socket.WebSocketSession;
033import org.springframework.web.socket.sockjs.transport.TransportType;
034
035/**
036 * An extension of {@link AbstractClientSockJsSession} for use with HTTP
037 * transports simulating a WebSocket session.
038 *
039 * @author Rossen Stoyanchev
040 * @since 4.1
041 */
042public class XhrClientSockJsSession extends AbstractClientSockJsSession {
043
044        private final XhrTransport transport;
045
046        private HttpHeaders headers;
047
048        private HttpHeaders sendHeaders;
049
050        private final URI sendUrl;
051
052        private int textMessageSizeLimit = -1;
053
054        private int binaryMessageSizeLimit = -1;
055
056
057        public XhrClientSockJsSession(TransportRequest request, WebSocketHandler handler,
058                        XhrTransport transport, SettableListenableFuture<WebSocketSession> connectFuture) {
059
060                super(request, handler, connectFuture);
061                Assert.notNull(transport, "'transport' is required");
062                this.transport = transport;
063                this.headers = request.getHttpRequestHeaders();
064                this.sendHeaders = new HttpHeaders();
065                if (this.headers != null) {
066                        this.sendHeaders.putAll(this.headers);
067                }
068                this.sendHeaders.setContentType(MediaType.APPLICATION_JSON);
069                this.sendUrl = request.getSockJsUrlInfo().getTransportUrl(TransportType.XHR_SEND);
070        }
071
072
073        public HttpHeaders getHeaders() {
074                return this.headers;
075        }
076
077        @Override
078        public InetSocketAddress getLocalAddress() {
079                return null;
080        }
081
082        @Override
083        public InetSocketAddress getRemoteAddress() {
084                return new InetSocketAddress(getUri().getHost(), getUri().getPort());
085        }
086
087        @Override
088        public String getAcceptedProtocol() {
089                return null;
090        }
091
092        @Override
093        public void setTextMessageSizeLimit(int messageSizeLimit) {
094                this.textMessageSizeLimit = messageSizeLimit;
095        }
096
097        @Override
098        public int getTextMessageSizeLimit() {
099                return this.textMessageSizeLimit;
100        }
101
102        @Override
103        public void setBinaryMessageSizeLimit(int messageSizeLimit) {
104                this.binaryMessageSizeLimit = -1;
105        }
106
107        @Override
108        public int getBinaryMessageSizeLimit() {
109                return this.binaryMessageSizeLimit;
110        }
111
112        @Override
113        public List<WebSocketExtension> getExtensions() {
114                return Collections.emptyList();
115        }
116
117        @Override
118        protected void sendInternal(TextMessage message) {
119                this.transport.executeSendRequest(this.sendUrl, this.sendHeaders, message);
120        }
121
122        @Override
123        protected void disconnect(CloseStatus status) {
124                // Nothing to do: XHR transports check if session is disconnected.
125        }
126
127}