ReactiveClientFullDuplexExchange.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hc.client5.http.examples;

import java.net.URI;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

import org.apache.hc.client5.http.impl.async.HttpAsyncClients;
import org.apache.hc.client5.http.impl.async.MinimalHttpAsyncClient;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.Header;
import org.apache.hc.core5.http.HttpResponse;
import org.apache.hc.core5.http.Message;
import org.apache.hc.core5.http.config.Http1Config;
import org.apache.hc.core5.http.nio.support.BasicRequestProducer;
import org.apache.hc.core5.http2.config.H2Config;
import org.apache.hc.core5.io.CloseMode;
import org.apache.hc.core5.reactive.ReactiveEntityProducer;
import org.apache.hc.core5.reactive.ReactiveResponseConsumer;
import org.apache.hc.core5.reactor.IOReactorConfig;
import org.reactivestreams.Publisher;

import io.reactivex.Flowable;
import io.reactivex.Observable;

/**
 * This example demonstrates a reactive, full-duplex HTTP/1.1 message exchange using RxJava.
 */
public class ReactiveClientFullDuplexExchange {

    public static void main(final String[] args) throws Exception {

        final MinimalHttpAsyncClient client = HttpAsyncClients.createMinimal(
                H2Config.DEFAULT,
                Http1Config.DEFAULT,
                IOReactorConfig.DEFAULT);

        client.start();

        final URI requestUri = new URI("http://httpbin.org/post");
        final byte[] bs = "stuff".getBytes(StandardCharsets.UTF_8);
        final ReactiveEntityProducer reactiveEntityProducer = new ReactiveEntityProducer(
            Flowable.just(ByteBuffer.wrap(bs)), bs.length, ContentType.TEXT_PLAIN, null);
        final BasicRequestProducer requestProducer = new BasicRequestProducer(
                "POST", requestUri, reactiveEntityProducer);

        final ReactiveResponseConsumer consumer = new ReactiveResponseConsumer();
        final Future<Void> requestFuture = client.execute(requestProducer, consumer, null);
        final Message<HttpResponse, Publisher<ByteBuffer>> streamingResponse = consumer.getResponseFuture().get();

        System.out.println(streamingResponse.getHead());
        for (final Header header : streamingResponse.getHead().getHeaders()) {
            System.out.println(header);
        }
        System.out.println();

        Observable.fromPublisher(streamingResponse.getBody())
            .map(byteBuffer -> {
                final byte[] string = new byte[byteBuffer.remaining()];
                byteBuffer.get(string);
                return new String(string);
            })
            .materialize()
            .forEach(System.out::println);

        requestFuture.get(1, TimeUnit.MINUTES);

        System.out.println("Shutting down");
        client.close(CloseMode.GRACEFUL);
    }
}