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/*
 * Copyright 2002-2018 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
 *
 *      https://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.client;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.util.concurrent.ExecutionException;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.ByteBufOutputStream;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpVersion;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.SettableListenableFuture;

/**
 * {@link ClientHttpRequest} implementation based on Netty 4.
 *
 * 

Created via the {@link Netty4ClientHttpRequestFactory}. * * @author Arjen Poutsma * @author Rossen Stoyanchev * @author Brian Clozel * @since 4.1.2 * @deprecated as of Spring 5.0, in favor of * {@link org.springframework.http.client.reactive.ReactorClientHttpConnector} */ @Deprecated class Netty4ClientHttpRequest extends AbstractAsyncClientHttpRequest implements ClientHttpRequest { private final Bootstrap bootstrap; private final URI uri; private final HttpMethod method; private final ByteBufOutputStream body; public Netty4ClientHttpRequest(Bootstrap bootstrap, URI uri, HttpMethod method) { this.bootstrap = bootstrap; this.uri = uri; this.method = method; this.body = new ByteBufOutputStream(Unpooled.buffer(1024)); } @Override public HttpMethod getMethod() { return this.method; } @Override public String getMethodValue() { return this.method.name(); } @Override public URI getURI() { return this.uri; } @Override public ClientHttpResponse execute() throws IOException { try { return executeAsync().get(); } catch (InterruptedException ex) { Thread.currentThread().interrupt(); throw new IOException("Interrupted during request execution", ex); } catch (ExecutionException ex) { if (ex.getCause() instanceof IOException) { throw (IOException) ex.getCause(); } else { throw new IOException(ex.getMessage(), ex.getCause()); } } } @Override protected OutputStream getBodyInternal(HttpHeaders headers) throws IOException { return this.body; } @Override protected ListenableFuture executeInternal(final HttpHeaders headers) throws IOException { final SettableListenableFuture responseFuture = new SettableListenableFuture<>(); ChannelFutureListener connectionListener = future -> { if (future.isSuccess()) { Channel channel = future.channel(); channel.pipeline().addLast(new RequestExecuteHandler(responseFuture)); FullHttpRequest nettyRequest = createFullHttpRequest(headers); channel.writeAndFlush(nettyRequest); } else { responseFuture.setException(future.cause()); } }; this.bootstrap.connect(this.uri.getHost(), getPort(this.uri)).addListener(connectionListener); return responseFuture; } private FullHttpRequest createFullHttpRequest(HttpHeaders headers) { io.netty.handler.codec.http.HttpMethod nettyMethod = io.netty.handler.codec.http.HttpMethod.valueOf(this.method.name()); String authority = this.uri.getRawAuthority(); String path = this.uri.toString().substring(this.uri.toString().indexOf(authority) + authority.length()); FullHttpRequest nettyRequest = new DefaultFullHttpRequest( HttpVersion.HTTP_1_1, nettyMethod, path, this.body.buffer()); nettyRequest.headers().set(HttpHeaders.HOST, this.uri.getHost() + ":" + getPort(this.uri)); nettyRequest.headers().set(HttpHeaders.CONNECTION, "close"); headers.forEach((headerName, headerValues) -> nettyRequest.headers().add(headerName, headerValues)); if (!nettyRequest.headers().contains(HttpHeaders.CONTENT_LENGTH) && this.body.buffer().readableBytes() > 0) { nettyRequest.headers().set(HttpHeaders.CONTENT_LENGTH, this.body.buffer().readableBytes()); } return nettyRequest; } private static int getPort(URI uri) { int port = uri.getPort(); if (port == -1) { if ("http".equalsIgnoreCase(uri.getScheme())) { port = 80; } else if ("https".equalsIgnoreCase(uri.getScheme())) { port = 443; } } return port; } /** * A SimpleChannelInboundHandler to update the given SettableListenableFuture. */ private static class RequestExecuteHandler extends SimpleChannelInboundHandler { private final SettableListenableFuture responseFuture; public RequestExecuteHandler(SettableListenableFuture responseFuture) { this.responseFuture = responseFuture; } @Override protected void channelRead0(ChannelHandlerContext context, FullHttpResponse response) throws Exception { this.responseFuture.set(new Netty4ClientHttpResponse(context, response)); } @Override public void exceptionCaught(ChannelHandlerContext context, Throwable cause) throws Exception { this.responseFuture.setException(cause); } } }





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