/*
* 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.server.upgrade;
import java.security.Principal;
import java.util.Optional;
import reactor.core.publisher.Mono;
import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.http.server.reactive.ReactorServerHttpResponse;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.web.reactive.socket.HandshakeInfo;
import org.springframework.web.reactive.socket.WebSocketHandler;
import org.springframework.web.reactive.socket.adapter.ReactorNettyWebSocketSession;
import org.springframework.web.reactive.socket.server.RequestUpgradeStrategy;
import org.springframework.web.server.ServerWebExchange;
/**
* A {@link RequestUpgradeStrategy} for use with Reactor Netty.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
@SuppressWarnings("OptionalUsedAsFieldOrParameterType")
public class ReactorNettyRequestUpgradeStrategy implements RequestUpgradeStrategy {
@Override
public Mono<Void> upgrade(ServerWebExchange exchange, WebSocketHandler handler,
Optional<String> subProtocol) {
ReactorServerHttpResponse response = (ReactorServerHttpResponse) exchange.getResponse();
HandshakeInfo info = getHandshakeInfo(exchange, subProtocol);
NettyDataBufferFactory bufferFactory = (NettyDataBufferFactory) response.bufferFactory();
return response.getReactorResponse().sendWebsocket(subProtocol.orElse(null),
(in, out) -> handler.handle(
new ReactorNettyWebSocketSession(in, out, info, bufferFactory)));
}
private HandshakeInfo getHandshakeInfo(ServerWebExchange exchange, Optional<String> protocol) {
ServerHttpRequest request = exchange.getRequest();
Mono<Principal> principal = exchange.getPrincipal();
return new HandshakeInfo(request.getURI(), request.getHeaders(), principal, protocol);
}
}