io.pivotal.spring.cloud.service.eureka.EurekaOAuth2RequestDecorator.java Source code

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Here is the source code for io.pivotal.spring.cloud.service.eureka.EurekaOAuth2RequestDecorator.java

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/*
 * Copyright 2015 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 io.pivotal.spring.cloud.service.eureka;

import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.AbstractClientHttpRequest;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.security.oauth2.client.DefaultOAuth2RequestAuthenticator;
import org.springframework.security.oauth2.client.OAuth2RequestAuthenticator;
import org.springframework.security.oauth2.client.OAuth2RestTemplate;
import org.springframework.security.oauth2.client.token.grant.client.ClientCredentialsResourceDetails;

/**
 * 
 * @author Will Tran
 *
 */
public class EurekaOAuth2RequestDecorator implements DiscoveryRequestDecorator {

    private final OAuth2RestTemplate oauth2RestTemplate;
    private final OAuth2RequestAuthenticator requestAuthenticator;

    public EurekaOAuth2RequestDecorator(ClientCredentialsResourceDetails resourceDetails) {
        oauth2RestTemplate = new OAuth2RestTemplate(resourceDetails);
        requestAuthenticator = new DefaultOAuth2RequestAuthenticator();
    }

    @Override
    public HttpHeaders getHeaders() {
        // do what org.springframework.security.oauth2.client.OAuth2RestTemplate.createRequest(URI, HttpMethod) does
        // to generate the header
        oauth2RestTemplate.getAccessToken();
        ClientHttpRequest requestHeaderExtrator = new AbstractClientHttpRequest() {

            @Override
            public URI getURI() {
                return null;
            }

            @Override
            public HttpMethod getMethod() {
                return null;
            }

            @Override
            protected OutputStream getBodyInternal(HttpHeaders headers) throws IOException {
                return null;
            }

            @Override
            protected ClientHttpResponse executeInternal(HttpHeaders headers) throws IOException {
                return null;
            }
        };
        requestAuthenticator.authenticate(oauth2RestTemplate.getResource(),
                oauth2RestTemplate.getOAuth2ClientContext(), requestHeaderExtrator);
        return requestHeaderExtrator.getHeaders();
    }

}