/*-
 * ================================================================================
 * DCAE DMaaP Bus Controller Web Application
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property
 * ================================================================================
 * 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.openecomp.dmaapbc.dbcapp.rest;

import java.net.URI;

import org.apache.http.HttpHost;
import org.apache.http.client.AuthCache;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.BasicAuthCache;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.HttpContext;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;

/**
 * Utility class to enable Basic HTTP Authentication with Spring REST templates.
 *   
 * From:
 * http://www.baeldung.com/2012/04/16/how-to-use-resttemplate-with-basic-authentication-in-spring-3-1/
 */
public class HttpComponentsClientHttpRequestFactoryBasicAuth extends HttpComponentsClientHttpRequestFactory {

	private HttpHost host;

	public HttpComponentsClientHttpRequestFactoryBasicAuth(HttpHost host) {
		super();
		this.host = host;
	}

	protected HttpContext createHttpContext(HttpMethod httpMethod, URI uri) {
		return createHttpContext();
	}

	private HttpContext createHttpContext() {
		// Create AuthCache instance
		AuthCache authCache = new BasicAuthCache();
		// Generate BASIC scheme object and add it to the local auth cache
		BasicScheme basicAuth = new BasicScheme();
		authCache.put(host, basicAuth);

		// Add AuthCache to the execution context
		BasicHttpContext localcontext = new BasicHttpContext();
		localcontext.setAttribute(HttpClientContext.AUTH_CACHE, authCache);
		return localcontext;
	}
}