/*
* 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.http.server.reactive;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.CompositeByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.cookie.Cookie;
import io.netty.handler.codec.http.cookie.DefaultCookie;
import io.reactivex.netty.protocol.http.server.HttpServerResponse;
import org.reactivestreams.Publisher;
import reactor.core.converter.RxJava1ObservableConverter;
import reactor.core.publisher.Mono;
import rx.Observable;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.core.io.buffer.FlushingDataBuffer;
import org.springframework.core.io.buffer.NettyDataBuffer;
import org.springframework.core.io.buffer.NettyDataBufferFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseCookie;
import org.springframework.util.Assert;
/**
* Adapt {@link ServerHttpResponse} to the RxNetty {@link HttpServerResponse}.
*
* @author Rossen Stoyanchev
* @author Stephane Maldini
*/
public class RxNettyServerHttpResponse extends AbstractServerHttpResponse {
private final HttpServerResponse<ByteBuf> response;
public RxNettyServerHttpResponse(HttpServerResponse<ByteBuf> response,
NettyDataBufferFactory dataBufferFactory) {
super(dataBufferFactory);
Assert.notNull("'response', response must not be null.");
this.response = response;
}
public HttpServerResponse<?> getRxNettyResponse() {
return this.response;
}
@Override
protected void writeStatusCode() {
HttpStatus statusCode = this.getStatusCode();
if (statusCode != null) {
this.response.setStatus(HttpResponseStatus.valueOf(statusCode.value()));
}
}
@Override
protected Mono<Void> writeWithInternal(Publisher<DataBuffer> body) {
Observable<ByteBuf> content = RxJava1ObservableConverter.fromPublisher(body).map(this::toByteBuf);
return RxJava1ObservableConverter.toPublisher(this.response.write(content, bb -> bb instanceof FlushingByteBuf)).then();
}
private ByteBuf toByteBuf(DataBuffer buffer) {
ByteBuf byteBuf = (buffer instanceof NettyDataBuffer ? ((NettyDataBuffer) buffer).getNativeBuffer() : Unpooled.wrappedBuffer(buffer.asByteBuffer()));
return (buffer instanceof FlushingDataBuffer ? new FlushingByteBuf(byteBuf) : byteBuf);
}
@Override
protected void writeHeaders() {
for (String name : getHeaders().keySet()) {
for (String value : getHeaders().get(name))
this.response.addHeader(name, value);
}
}
@Override
protected void writeCookies() {
for (String name : getCookies().keySet()) {
for (ResponseCookie httpCookie : getCookies().get(name)) {
Cookie cookie = new DefaultCookie(name, httpCookie.getValue());
if (!httpCookie.getMaxAge().isNegative()) {
cookie.setMaxAge(httpCookie.getMaxAge().getSeconds());
}
httpCookie.getDomain().ifPresent(cookie::setDomain);
httpCookie.getPath().ifPresent(cookie::setPath);
cookie.setSecure(httpCookie.isSecure());
cookie.setHttpOnly(httpCookie.isHttpOnly());
this.response.addCookie(cookie);
}
}
}
private class FlushingByteBuf extends CompositeByteBuf {
public FlushingByteBuf(ByteBuf byteBuf) {
super(byteBuf.alloc(), byteBuf.isDirect(), 1);
this.addComponent(true, byteBuf);
}
}
/*
While the underlying implementation of {@link ZeroCopyHttpOutputMessage} seems to
work; it does bypass {@link #applyBeforeCommit} and more importantly it doesn't change
its {@linkplain #state()). Therefore it's commented out, for now.
We should revisit this code once
https://github.com/ReactiveX/RxNetty/issues/194 has been fixed.
@Override
public Mono<Void> writeWith(File file, long position, long count) {
Channel channel = this.response.unsafeNettyChannel();
HttpResponse httpResponse =
new DefaultHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
io.netty.handler.codec.http.HttpHeaders headers = httpResponse.headers();
for (Map.Entry<String, List<String>> header : getHeaders().entrySet()) {
String headerName = header.getKey();
for (String headerValue : header.getValue()) {
headers.add(headerName, headerValue);
}
}
Mono<Void> responseWrite = MonoChannelFuture.from(channel.write(httpResponse));
FileRegion fileRegion = new DefaultFileRegion(file, position, count);
Mono<Void> fileWrite = MonoChannelFuture.from(channel.writeAndFlush(fileRegion));
return Flux.concat(applyBeforeCommit(), responseWrite, fileWrite).then();
}
*/
}