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Android Http Core Library
There is a newer version: 2.0.2
package com.cmonbaby.http.rxjava;

import retrofit2.HttpException;
import retrofit2.Response;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.exceptions.Exceptions;
import rx.exceptions.OnCompletedFailedException;
import rx.exceptions.OnErrorFailedException;
import rx.exceptions.OnErrorNotImplementedException;

/**
 * Author:      Simon
 * 
QO:          8950764
 * 
Email:       [email protected]
 * 
WebSize:     https://www.cmonbaby.com
 * 
Version:     1.0.0
 * 
Date:        2020/12/28
 * Description:
 */
final class BodyOnSubscribe implements OnSubscribe {

    private final OnSubscribe> upstream;

    BodyOnSubscribe(OnSubscribe> upstream) {
        this.upstream = upstream;
    }

    @Override
    public void call(Subscriber subscriber) {
        upstream.call(new BodySubscriber<>(subscriber));
    }

    private static class BodySubscriber extends Subscriber> {
        private final Subscriber subscriber;
        /**
         * Indicates whether a terminal event has been sent to {@link #subscriber}.
         */
        private boolean subscriberTerminated;

        BodySubscriber(Subscriber subscriber) {
            super(subscriber);
            this.subscriber = subscriber;
        }

        @Override
        public void onNext(Response response) {
            if (response.isSuccessful()) {
                subscriber.onNext(response.body());
            } else {
                subscriberTerminated = true;
                Throwable t = new HttpException(response);
                try {
                    subscriber.onError(t);
                } catch (OnCompletedFailedException
                        | OnErrorFailedException
                        | OnErrorNotImplementedException e) {
                    e.printStackTrace();
                } catch (Throwable inner) {
                    Exceptions.throwIfFatal(inner);
                    inner.printStackTrace();
                }
            }
        }

        @Override
        public void onError(Throwable throwable) {
            if (!subscriberTerminated) {
                subscriber.onError(throwable);
            } else {
                // This should never happen! onNext handles and forwards errors automatically.
                throw new AssertionError("This should never happen! Report as a Retrofit bug with the full stacktrace.");
            }
        }

        @Override
        public void onCompleted() {
            if (!subscriberTerminated) {
                subscriber.onCompleted();
            }
        }
    }
}