org.kaaproject.kaa.server.admin.servlet.FileUpload.java Source code

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Here is the source code for org.kaaproject.kaa.server.admin.servlet.FileUpload.java

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/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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.kaaproject.kaa.server.admin.servlet;

import org.apache.commons.fileupload.FileItemIterator;
import org.apache.commons.fileupload.FileItemStream;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.util.Streams;
import org.kaaproject.kaa.server.admin.services.cache.CacheService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.support.SpringBeanAutowiringSupport;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class FileUpload extends HttpServlet {

    private static final long serialVersionUID = 2959115024959843564L;

    private static final Logger LOG = LoggerFactory.getLogger(FileUpload.class);

    @Autowired
    private CacheService cacheService;

    @Override
    public void init(ServletConfig config) throws ServletException {
        super.init(config);
        SpringBeanAutowiringSupport.processInjectionBasedOnServletContext(this, config.getServletContext());
    }

    //CHECKSTYLE:OFF
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //CHECKSTYLE:ON
        ServletFileUpload upload = new ServletFileUpload();

        try {
            FileItemIterator iter = upload.getItemIterator(request);
            if (iter.hasNext()) {
                FileItemStream item = iter.next();
                String name = item.getFieldName();

                LOG.debug("Uploading file '{}' with item name '{}'", item.getName(), name);

                InputStream stream = item.openStream();

                // Process the input stream
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                Streams.copy(stream, out, true);

                byte[] data = out.toByteArray();

                cacheService.uploadedFile(name, data);
            } else {
                LOG.error("No file found in post request!");
                throw new RuntimeException("No file found in post request!");
            }
        } catch (Exception ex) {
            LOG.error("Unexpected error in FileUpload.doPost: ", ex);
            throw new RuntimeException(ex);
        }

    }
}