es.ucm.fdi.storage.web.StorageController.java Source code

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Here is the source code for es.ucm.fdi.storage.web.StorageController.java

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/**
 * This file is part of D.A.L.G.S.
 *
 * D.A.L.G.S is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * D.A.L.G.S is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with D.A.L.G.S.  If not, see <http://www.gnu.org/licenses/>.
 */
package es.ucm.fdi.storage.web;

import java.io.IOException;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import es.ucm.fdi.storage.business.boundary.StorageManager;
import es.ucm.fdi.storage.business.entity.StorageObject;

@Controller
public class StorageController {

    private static final Logger logger = LoggerFactory.getLogger("es.ucm.fdi.storage");

    @Autowired
    private StorageManager storage;

    @RequestMapping(method = RequestMethod.GET, value = "/storage/**")
    public void servirArchivos(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String ctxPath = request.getContextPath();
        String objectId = request.getRequestURI();
        objectId = objectId.substring(ctxPath.length() + "/storage/".length());
        int pos = objectId.indexOf('/');
        if (pos < 0) {
            response.sendError(400, "Upps");
            return;
        }
        String bucket = objectId.substring(0, pos);
        String key = objectId.substring(pos + 1);
        StorageObject object = storage.getObject(bucket, key);
        String mimeType = object.getMimeType();
        long length = object.getContentLength();

        // set content attributes for the response
        response.setContentType(mimeType);
        response.setContentLength((int) length);

        try {
            object.transferTo(response.getOutputStream());
            response.flushBuffer();
        } catch (IOException ex) {
            logger.error("Error writing file to output stream. bucket=>'{}', key=>'{}'", bucket, key, ex);
            response.sendError(500, "Upps");
        }
    }
}