org.springframework.web.socket.sockjs.client.SockJsUrlInfo Maven / Gradle / Ivy
/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.socket.sockjs.client;
import java.net.URI;
import java.util.UUID;
import org.springframework.util.IdGenerator;
import org.springframework.util.JdkIdGenerator;
import org.springframework.web.socket.sockjs.transport.TransportType;
import org.springframework.web.util.UriComponentsBuilder;
/**
* Container for the base URL of a SockJS endpoint with additional helper methods
* to derive related SockJS URLs as the {@link #getInfoUrl() info} URL and
* {@link #getTransportUrl(TransportType) transport} URLs.
*
* @author Rossen Stoyanchev
* @since 4.1
*/
public class SockJsUrlInfo {
private static final IdGenerator idGenerator = new JdkIdGenerator();
private final URI sockJsUrl;
private String serverId;
private String sessionId;
private UUID uuid;
public SockJsUrlInfo(URI sockJsUrl) {
this.sockJsUrl = sockJsUrl;
}
public URI getSockJsUrl() {
return this.sockJsUrl;
}
public String getServerId() {
if (this.serverId == null) {
this.serverId = String.valueOf(Math.abs(getUuid().getMostSignificantBits()) % 1000);
}
return this.serverId;
}
public String getSessionId() {
if (this.sessionId == null) {
this.sessionId = getUuid().toString().replace("-","");
}
return this.sessionId;
}
protected UUID getUuid() {
if (this.uuid == null) {
this.uuid = idGenerator.generateId();
}
return this.uuid;
}
public URI getInfoUrl() {
return UriComponentsBuilder.fromUri(this.sockJsUrl)
.scheme(getScheme(TransportType.XHR))
.pathSegment("info")
.build(true).toUri();
}
public URI getTransportUrl(TransportType transportType) {
return UriComponentsBuilder.fromUri(this.sockJsUrl)
.scheme(getScheme(transportType))
.pathSegment(getServerId())
.pathSegment(getSessionId())
.pathSegment(transportType.toString())
.build(true).toUri();
}
private String getScheme(TransportType transportType) {
String scheme = this.sockJsUrl.getScheme();
if (TransportType.WEBSOCKET.equals(transportType)) {
if (!scheme.startsWith("ws")) {
scheme = ("https".equals(scheme) ? "wss" : "ws");
}
}
else {
if (!scheme.startsWith("http")) {
scheme = ("wss".equals(scheme) ? "https" : "http");
}
}
return scheme;
}
@Override
public String toString() {
return "SockJsUrlInfo[url=" + this.sockJsUrl + "]";
}
}