com.cloudbees.demo.beesshop.service.MongoDbFileStorageService.java Source code

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Here is the source code for com.cloudbees.demo.beesshop.service.MongoDbFileStorageService.java

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/*
 * Copyright 2010-2013, 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 com.cloudbees.demo.beesshop.service;

import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
import com.google.common.collect.Iterables;
import com.google.common.io.ByteStreams;
import com.mongodb.DB;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;
import org.bson.types.ObjectId;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

/**
 * MongoDB GridFS storage for images.
 *
 * @author <a href="mailto:cleclerc@cloudbees.com">Cyrille Le Clerc</a>
 */
@Service
public class MongoDbFileStorageService implements InitializingBean {

    protected final Logger logger = LoggerFactory.getLogger(getClass());
    private final Random random = new Random();
    private String cdnDomainName;
    private Map<String, String> contentTypeByFileExtension = new HashMap<String, String>() {
        {
            put("jpg", "image/jpeg");
            put("jpeg", "image/jpeg");
            put("png", "image/png");
            put("gif", "image/gif");
        }
    };
    private Map<String, String> defaultFileExtensionByContentType = new HashMap<String, String>() {
        {
            put("image/jpeg", "jpg");
            put("image/png", "png");
            put("image/gif", "gif");
        }
    };
    private GridFS gridFS;

    @Autowired
    public MongoDbFileStorageService(DB db) {
        this.gridFS = new GridFS(db, "media");
    }

    @Override
    public void afterPropertiesSet() throws Exception {

    }

    @Nullable
    public String findContentType(String fileName) {
        String fileExtension = Iterables.getLast(Splitter.on('.').split(fileName), null);
        fileExtension = Strings.nullToEmpty(fileExtension).toLowerCase();
        return contentTypeByFileExtension.get(fileExtension);
    }

    @Nonnull
    public String storeFile(InputStream in, String contentType) {
        String extension = defaultFileExtensionByContentType.get(contentType);
        String fileName = Joiner.on(".").skipNulls().join(Math.abs(random.nextLong()), extension);

        GridFSInputFile file = gridFS.createFile(in, fileName);
        file.setContentType(contentType);
        file.save();
        return "gridfs://" + gridFS.getBucketName() + "/" + file.getId().toString();
    }

    public void serveFile(String photoId, String id, HttpServletResponse response) throws IOException {

        GridFSDBFile file = gridFS.findOne(new ObjectId(id));
        response.setContentType(file.getContentType());
        response.setHeader("cache-control", "public, max-age=" + TimeUnit.SECONDS.convert(365, TimeUnit.DAYS));
        try (InputStream in = file.getInputStream()) {
            ByteStreams.copy(in, response.getOutputStream());
        }

    }

    public String getCdnDomainName() {
        return cdnDomainName;
    }

    public void setCdnDomainName(String cdnDomainName) {
        this.cdnDomainName = cdnDomainName;
    }
}