/*
* Copyright 2002-2016 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.reactive.socket.client;
import java.net.URI;
import java.util.Optional;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import reactor.core.publisher.Mono;
import org.springframework.http.HttpHeaders;
import org.springframework.web.reactive.socket.HandshakeInfo;
import org.springframework.web.reactive.socket.WebSocketHandler;
/**
* Base class for {@link WebSocketClient} implementations.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public class WebSocketClientSupport {
private static final String SEC_WEBSOCKET_PROTOCOL = "Sec-WebSocket-Protocol";
protected final Log logger = LogFactory.getLog(getClass());
protected String[] beforeHandshake(URI url, HttpHeaders requestHeaders, WebSocketHandler handler) {
if (logger.isDebugEnabled()) {
logger.debug("Executing handshake to " + url);
}
return handler.getSubProtocols();
}
protected HandshakeInfo afterHandshake(URI url, HttpHeaders responseHeaders) {
if (logger.isDebugEnabled()) {
logger.debug("Handshake response: " + url + ", " + responseHeaders);
}
String protocol = responseHeaders.getFirst(SEC_WEBSOCKET_PROTOCOL);
return new HandshakeInfo(url, responseHeaders, Mono.empty(), Optional.ofNullable(protocol));
}
}