_ClientCredentialsGrantTokenProvider.java

/*
 * Copyright 2013-2017 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.cloudfoundry.reactor.tokenprovider;

import org.cloudfoundry.reactor.TokenProvider;
import org.immutables.value.Value;
import reactor.core.publisher.Mono;
import reactor.ipc.netty.http.client.HttpClientRequest;

/**
 * The Client Credentials Grant implementation of {@link TokenProvider}
 */
@Value.Immutable
abstract class _ClientCredentialsGrantTokenProvider extends AbstractUaaTokenProvider {

    @Override
    Mono<Void> tokenRequestTransformer(Mono<HttpClientRequest> outbound) {
        return outbound
            .then(request -> request
                .sendForm(form -> form
                    .multipart(false)
                    .attr("client_id", getClientId())
                    .attr("client_secret", getClientSecret())
                    .attr("grant_type", "client_credentials")
                    .attr("response_type", "token"))
                .then());
    }

}