org.mitre.openid.connect.service.impl.InMemoryClientLogoLoadingService.java Source code

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Here is the source code for org.mitre.openid.connect.service.impl.InMemoryClientLogoLoadingService.java

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/*******************************************************************************
 * Copyright 2016 The MITRE Corporation
 *   and the MIT Internet Trust Consortium
 *
 * 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.mitre.openid.connect.service.impl;

import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

import org.apache.commons.io.IOUtils;
import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.mitre.oauth2.model.ClientDetailsEntity;
import org.mitre.openid.connect.model.CachedImage;
import org.mitre.openid.connect.service.ClientLogoLoadingService;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.stereotype.Service;

import com.google.common.base.Strings;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.util.concurrent.UncheckedExecutionException;

/**
 * @author jricher
 *
 */
@Service("inMemoryClientLogoLoadingService")
public class InMemoryClientLogoLoadingService implements ClientLogoLoadingService {

    private LoadingCache<ClientDetailsEntity, CachedImage> cache;

    public InMemoryClientLogoLoadingService() {
        this(HttpClientBuilder.create().useSystemProperties().build());
    }

    /**
     * 
     */
    public InMemoryClientLogoLoadingService(HttpClient httpClient) {

        cache = CacheBuilder.newBuilder().maximumSize(100).expireAfterAccess(14, TimeUnit.DAYS)
                .build(new ClientLogoFetcher(httpClient));

    }

    /* (non-Javadoc)
     * @see org.mitre.openid.connect.service.ClientLogoLoadingService#getLogo(org.mitre.oauth2.model.ClientDetailsEntity)
     */
    @Override
    public CachedImage getLogo(ClientDetailsEntity client) {
        try {
            if (client != null && !Strings.isNullOrEmpty(client.getLogoUri())) {
                return cache.get(client);
            } else {
                return null;
            }
        } catch (UncheckedExecutionException | ExecutionException e) {
            return null;
        }
    }

    /**
     * @author jricher
     *
     */
    public class ClientLogoFetcher extends CacheLoader<ClientDetailsEntity, CachedImage> {
        private HttpClient httpClient;

        public ClientLogoFetcher() {
            this(HttpClientBuilder.create().useSystemProperties().build());
        }

        public ClientLogoFetcher(HttpClient httpClient) {
            this.httpClient = httpClient;
        }

        /* (non-Javadoc)
         * @see com.google.common.cache.CacheLoader#load(java.lang.Object)
         */
        @Override
        public CachedImage load(ClientDetailsEntity key) throws Exception {
            try {
                HttpResponse response = httpClient.execute(new HttpGet(key.getLogoUri()));

                HttpEntity entity = response.getEntity();

                CachedImage image = new CachedImage();

                image.setContentType(entity.getContentType().getValue());
                image.setLength(entity.getContentLength());
                image.setData(IOUtils.toByteArray(entity.getContent()));

                return image;
            } catch (IOException e) {
                throw new IllegalArgumentException("Unable to load client image.");
            }
        }

    }

}