121 lines
4.2 KiB
Java
121 lines
4.2 KiB
Java
package org.gcube.portlets.user.reportgenerator.server.servlet;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.StringReader;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import org.apache.commons.io.IOUtils;
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import org.apache.log4j.Logger;
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import org.gcube.application.framework.core.session.SessionManager;
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import org.gcube.common.homelibrary.home.HomeLibrary;
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import org.gcube.common.homelibrary.home.exceptions.HomeNotFoundException;
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import org.gcube.common.homelibrary.home.exceptions.InternalErrorException;
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import org.gcube.common.homelibrary.home.workspace.Workspace;
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import org.gcube.common.homelibrary.home.workspace.WorkspaceItem;
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import org.gcube.common.homelibrary.home.workspace.exceptions.WorkspaceFolderNotFoundException;
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import org.gcube.common.homelibrary.home.workspace.folder.items.ExternalImage;
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import org.gcube.common.homelibrary.util.MimeTypeUtil;
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import org.gcube.common.portal.PortalContext;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.portal.custom.scopemanager.scopehelper.ScopeHelper;
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/**
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* Servlet implementation class DownloadImageServlet
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*/
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public class DownloadImageServlet extends HttpServlet {
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protected static Logger _log = Logger.getLogger(DownloadImageServlet.class);
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private static final long serialVersionUID = 1L;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public DownloadImageServlet() {
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super();
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
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*/
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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String itemId = req.getParameter("id");
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if(itemId==null || itemId.isEmpty()){
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sendError(resp,HttpServletResponse.SC_INTERNAL_SERVER_ERROR +": Item id is null");
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return;
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}
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Workspace wa;
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WorkspaceItem item;
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try{
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wa = getWorkspaceArea(req.getSession());
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item = wa.getItem(itemId);
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ExternalImage externalImage = (ExternalImage) item;
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String mimeType = externalImage.getMimeType();
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String itemName = MimeTypeUtil.getNameWithExtension(item.getName(), mimeType);
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resp.setHeader( "Content-Disposition", "inline; filename=\"" + itemName + "\"" );
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resp.setContentType(externalImage.getMimeType());
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resp.setContentLength((int) externalImage.getLength());
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OutputStream out = resp.getOutputStream();
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InputStream is = externalImage.getData();
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IOUtils.copy(is, out);
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is.close();
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out.close();
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return;
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} catch (Exception e) {
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_log.error("Error during item retrieving "+itemId,e);
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sendError(resp,HttpServletResponse.SC_INTERNAL_SERVER_ERROR +": Error during image retrieving: "+e.getMessage());
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return;
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}
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}
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { }
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/**
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*
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* @return
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* @throws WorkspaceFolderNotFoundException
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* @throws InternalErrorException
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* @throws HomeNotFoundException
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*/
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protected Workspace getWorkspaceArea(HttpSession session) throws WorkspaceFolderNotFoundException, InternalErrorException, HomeNotFoundException {
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String user = (String) session.getAttribute(ScopeHelper.USERNAME_ATTRIBUTE);
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String currScope = ScopeProvider.instance.get();
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if (currScope == null) {
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String scope2Set = "/"+PortalContext.getConfiguration().getInfrastructureName();
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ScopeProvider.instance.set(scope2Set);
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_log.warn("Found scope null, setting infrastructure scope="+scope2Set);
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}
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if (user == null) {
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user = ReportServiceImpl.TEST_USER;
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ScopeProvider.instance.set(ReportServiceImpl.TEST_SCOPE);
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_log.warn("User is null in session, setting dev user = " + user);
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}
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Workspace toReturn = HomeLibrary.getUserWorkspace(user);
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return toReturn;
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}
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protected void sendError(HttpServletResponse response, String resultMessage) throws IOException {
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response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
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_log.trace("error message: "+resultMessage);
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_log.trace("writing response...");
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StringReader sr = new StringReader(resultMessage);
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IOUtils.copy(sr, response.getOutputStream());
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_log.trace("response wrote");
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response.flushBuffer();
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}
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}
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