001/*
002 * Copyright 2002-2018 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, "XhrTransport is required");
062                this.transport = transport;
063                this.headers = request.getHttpRequestHeaders();
064                this.sendHeaders = new HttpHeaders();
065                this.sendHeaders.putAll(this.headers);
066                this.sendHeaders.setContentType(MediaType.APPLICATION_JSON);
067                this.sendUrl = request.getSockJsUrlInfo().getTransportUrl(TransportType.XHR_SEND);
068        }
069
070
071        public HttpHeaders getHeaders() {
072                return this.headers;
073        }
074
075        @Override
076        public InetSocketAddress getLocalAddress() {
077                return null;
078        }
079
080        @Override
081        public InetSocketAddress getRemoteAddress() {
082                URI uri = getUri();
083                return (uri != null ? new InetSocketAddress(uri.getHost(), uri.getPort()) : null);
084        }
085
086        @Override
087        public String getAcceptedProtocol() {
088                return null;
089        }
090
091        @Override
092        public void setTextMessageSizeLimit(int messageSizeLimit) {
093                this.textMessageSizeLimit = messageSizeLimit;
094        }
095
096        @Override
097        public int getTextMessageSizeLimit() {
098                return this.textMessageSizeLimit;
099        }
100
101        @Override
102        public void setBinaryMessageSizeLimit(int messageSizeLimit) {
103                this.binaryMessageSizeLimit = -1;
104        }
105
106        @Override
107        public int getBinaryMessageSizeLimit() {
108                return this.binaryMessageSizeLimit;
109        }
110
111        @Override
112        public List<WebSocketExtension> getExtensions() {
113                return Collections.emptyList();
114        }
115
116        @Override
117        protected void sendInternal(TextMessage message) {
118                this.transport.executeSendRequest(this.sendUrl, this.sendHeaders, message);
119        }
120
121        @Override
122        protected void disconnect(CloseStatus status) {
123                // Nothing to do: XHR transports check if session is disconnected.
124        }
125
126}