com.webpagebytes.cms.engine.LocalCloudFileContentBuilder.java Source code

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Here is the source code for com.webpagebytes.cms.engine.LocalCloudFileContentBuilder.java

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/*
 *   Copyright 2014 Webpagebytes
 *
 * 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.webpagebytes.cms.engine;

import java.io.InputStream;
import java.nio.charset.Charset;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;

import com.webpagebytes.cms.WPBFileInfo;
import com.webpagebytes.cms.WPBFilePath;
import com.webpagebytes.cms.WPBFileStorage;
import com.webpagebytes.cms.exception.WPBIOException;
import com.webpagebytes.cms.utility.CmsBase64Utility;

public class LocalCloudFileContentBuilder {

    public static final String LOCAL_FILE_SERVE_URL = "/__wblocalfile/";

    private WPBFileStorage cloudFileStorage;

    public LocalCloudFileContentBuilder() {
        cloudFileStorage = WPBFileStorageFactory.getInstance();
    }

    public void serveFile(HttpServletRequest request, HttpServletResponse response, String uri)
            throws WPBIOException {
        if (!uri.startsWith(LOCAL_FILE_SERVE_URL)) {
            return;
        }
        String fullFilePath = uri.substring(LOCAL_FILE_SERVE_URL.length());
        int pos = fullFilePath.indexOf('/');
        String bucket = fullFilePath.substring(0, pos);
        String file = fullFilePath.substring(pos + 1);
        file = new String(CmsBase64Utility.fromSafePathBase64(file), Charset.forName("UTF-8"));
        WPBFilePath cloudFile = new WPBFilePath(bucket, file);
        InputStream is = null;
        try {
            is = cloudFileStorage.getFileContent(cloudFile);
            IOUtils.copy(is, response.getOutputStream());
            WPBFileInfo fileInfo = cloudFileStorage.getFileInfo(cloudFile);
            response.setContentType(fileInfo.getContentType());

            // do not close the response outputstream here
        } catch (Exception e) {
            throw new WPBIOException("cannot serve file", e);
        } finally {
            IOUtils.closeQuietly(is);
        }
    }
}