001/**
002 * Copyright 2015 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.fcrepo.client;
017
018import static org.apache.commons.lang3.StringUtils.isBlank;
019import static org.slf4j.LoggerFactory.getLogger;
020
021import org.apache.http.HttpHost;
022import org.apache.http.auth.AuthScope;
023import org.apache.http.auth.UsernamePasswordCredentials;
024import org.apache.http.client.CredentialsProvider;
025import org.apache.http.impl.client.BasicCredentialsProvider;
026import org.apache.http.impl.client.CloseableHttpClient;
027import org.apache.http.impl.client.HttpClients;
028import org.slf4j.Logger;
029
030/**
031 * A utility class for building an httpclient for interacting with a Fedora repository
032 *
033 * @author Aaron Coburn
034 * @since March 9, 2015
035 */
036public class FcrepoHttpClientBuilder {
037
038    private String username;
039
040    private String password;
041
042    private String host;
043
044    private static final Logger LOGGER = getLogger(FcrepoHttpClientBuilder.class);
045
046    /**
047     * Create a FcrepoHttpClientBuilder object with which it is possible to create
048     * an HttpClient object
049     *
050     * @param username an optional username for authentication
051     * @param password an optional password for authentication
052     * @param host an optional realm for authentication
053     */
054    public FcrepoHttpClientBuilder(final String username, final String password, final String host) {
055        this.username = username;
056        this.password = password;
057        this.host = host;
058    }
059
060    /**
061     *  Build an HttpClient
062     *
063     *  @return an HttpClient
064     */
065    public CloseableHttpClient build() {
066
067        if (isBlank(username) || isBlank(password)) {
068            return HttpClients.createDefault();
069        } else {
070            LOGGER.debug("Accessing fcrepo with user credentials");
071
072            final CredentialsProvider credsProvider = new BasicCredentialsProvider();
073            AuthScope scope = null;
074
075            if (isBlank(host)) {
076                scope = new AuthScope(AuthScope.ANY);
077            } else {
078                scope = new AuthScope(new HttpHost(host));
079            }
080            credsProvider.setCredentials(
081                    scope,
082                    new UsernamePasswordCredentials(username, password));
083            return HttpClients.custom()
084                    .setDefaultCredentialsProvider(credsProvider)
085                    .build();
086        }
087    }
088}