web

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-as/trunk@87 7b5415b0-85f9-ee4d-85bd-d5d0c3b42d1c

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diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/web/servlets/VerifyServlet.java b/src/main/java/at/knowcenter/wag/egov/egiz/web/servlets/VerifyServlet.java
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+/*

+ * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>

+ * 

+ * This software is the confidential and proprietary information of Know-Center,

+ * Graz, Austria. You shall not disclose such Confidential Information and shall

+ * use it only in accordance with the terms of the license agreement you entered

+ * into with Know-Center.

+ * 

+ * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF

+ * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE

+ * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR

+ * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY

+ * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS

+ * DERIVATIVES.

+ * 

+ * $Id: Verify.java,v 1.7 2006/10/11 07:39:13 wprinz Exp $

+ */

+package at.knowcenter.wag.egov.egiz.web.servlets;

+

+import java.io.IOException;

+import java.io.UnsupportedEncodingException;

+import java.net.URL;

+import java.util.Iterator;

+import java.util.List;

+import java.util.Properties;

+

+import javax.servlet.RequestDispatcher;

+import javax.servlet.ServletException;

+import javax.servlet.http.HttpServlet;

+import javax.servlet.http.HttpServletRequest;

+import javax.servlet.http.HttpServletResponse;

+

+import org.apache.commons.fileupload.FileItem;

+import org.apache.commons.fileupload.FileUploadException;

+import org.apache.commons.fileupload.disk.DiskFileItemFactory;

+import org.apache.commons.fileupload.servlet.ServletFileUpload;

+import org.apache.commons.logging.Log;

+import org.apache.commons.logging.LogFactory;

+import org.apache.log4j.Logger;

+

+import at.knowcenter.wag.egov.egiz.PdfAS;

+import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;

+import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;

+import at.knowcenter.wag.egov.egiz.exceptions.ConnectorFactoryException;

+import at.knowcenter.wag.egov.egiz.exceptions.NormalizeException;

+import at.knowcenter.wag.egov.egiz.exceptions.PDFDocumentException;

+import at.knowcenter.wag.egov.egiz.exceptions.PresentableException;

+import at.knowcenter.wag.egov.egiz.exceptions.SignatureException;

+import at.knowcenter.wag.egov.egiz.exceptions.SignatureTypesException;

+import at.knowcenter.wag.egov.egiz.framework.VerificationFilter;

+import at.knowcenter.wag.egov.egiz.pdf.SignatureHolder;

+import at.knowcenter.wag.egov.egiz.sig.ConnectorFactory;

+import at.knowcenter.wag.egov.egiz.sig.SignatureData;

+import at.knowcenter.wag.egov.egiz.sig.SignatureDataImpl;

+import at.knowcenter.wag.egov.egiz.sig.SignatureObject;

+import at.knowcenter.wag.egov.egiz.sig.connectors.LocalConnector;

+import at.knowcenter.wag.egov.egiz.sig.connectors.bku.LocRefDetachedBKUConnector;

+import at.knowcenter.wag.egov.egiz.sig.connectors.bku.SignSignatureObject;

+import at.knowcenter.wag.egov.egiz.tools.CodingHelper;

+import at.knowcenter.wag.egov.egiz.web.FormFields;

+import at.knowcenter.wag.egov.egiz.web.LocalRequest;

+import at.knowcenter.wag.egov.egiz.web.LocalRequestHelper;

+import at.knowcenter.wag.egov.egiz.web.SessionAttributes;

+import at.knowcenter.wag.egov.egiz.web.SessionInformation;

+import at.knowcenter.wag.egov.egiz.web.servlets.SignServlet.UploadedData;

+

+/**

+ * This method is the verify servlet for the pdf-as web application. It takes

+ * get and post requests fill out jsp templates and give the user feedback about

+ * the results of the verify process.

+ * 

+ * @author wlackner

+ * @author wprinz

+ */

+public class VerifyServlet extends HttpServlet

+{

+

+  /**

+   * SVUID.

+   */

+  private static final long serialVersionUID = 309198792358636766L;

+

+  /**

+   * The log.

+   */

+  private static Log log = LogFactory.getLog(SignServlet.class);

+

+  protected void dispatch(HttpServletRequest request,

+      HttpServletResponse response, String resource) throws ServletException, IOException

+  {

+    response.setContentType("text/html"); //$NON-NLS-1$

+    response.setCharacterEncoding("UTF-8"); //$NON-NLS-1$

+

+    RequestDispatcher disp = getServletContext().getRequestDispatcher(resource);

+    disp.forward(request, response);

+  }

+

+  protected void dispatchToResults(List results, HttpServletRequest request,

+      HttpServletResponse response) throws ServletException, IOException

+  {

+    request.setAttribute("results", results); //$NON-NLS-1$

+    dispatch(request, response, "/jsp/results.jsp"); //$NON-NLS-1$

+  }

+

+  /**

+   * Processes the verify upload.

+   * 

+   * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest,

+   *      javax.servlet.http.HttpServletResponse)

+   */

+  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException

+  {

+    try

+    {

+      UploadedData ud = retrieveUploadedDataFromRequest(request);

+

+      List signature_holders = extractSignatureHoldersFromFile(ud.file_name, ud.file_data);

+

+      SessionInformation si = new SessionInformation(); // SessionTable.generateSessionInformationObject();

+      si.connector = ud.sig_app;

+      si.application = "verify";

+      si.mode = null;

+      si.pdf = null;

+      si.type = null;

+      si.user_name = null;

+      si.user_password = null;

+

+      si.signature_holders = signature_holders;

+

+      request.getSession().setAttribute(SessionAttributes.ATTRIBUTE_SESSION_INFORMATION, si);

+

+      if (ud.preview)

+      {

+        dispatch(request, response, "/jsp/verifylist.jsp");

+        // VerifyPreview.formatPreview(signature_holders, connector, request,

+        // response);

+      }

+      else

+      {

+        if (ConnectorFactory.isConnectorLocal(si.connector))

+        {

+          String dispatch_to = LocalRequestHelper.processLocalVerify(si, si.signature_holders, request, response);

+          dispatch(request, response, dispatch_to);

+          return;

+        }

+

+        List results = PdfAS.verifySignatureHolders(signature_holders, si.connector);

+        dispatchToResults(results, request, response);

+      }

+

+    }

+    catch (FileUploadException e)

+    {

+      request.setAttribute("error", "Fehler beim Upload der Daten");

+      request.setAttribute("cause", "Beim Upload der Daten ist ein Fehler aufgetreten.");

+      dispatch(request, response, "/jsp/error.jsp");

+    }

+    catch (PresentableException e)

+    {

+      e.printStackTrace();

+      SignServlet.prepareDispatchToErrorPage(e, request);

+      dispatch(request, response, "/jsp/error.jsp");

+    }

+

+  }

+  

+  protected UploadedData retrieveUploadedDataFromRequest(

+      HttpServletRequest request) throws ServletException, UnsupportedEncodingException, FileUploadException, PDFDocumentException

+  {

+    DiskFileItemFactory fif = new DiskFileItemFactory();

+    fif.setRepository(SettingsReader.getTemporaryDirectory());

+    ServletFileUpload sfu = new ServletFileUpload(fif);

+

+    List items = sfu.parseRequest(request);

+

+    FileItem upload_fi = null;

+    FileItem connector_fi = null;

+    // FileItem mode_fi = null;

+    FileItem preview_fi = null;

+

+    {

+      Iterator it = items.iterator();

+      while (it.hasNext())

+      {

+        FileItem item = (FileItem) it.next();

+        log.debug("item = " + item.getFieldName()); //$NON-NLS-1$

+

+        if (item.isFormField())

+        {

+          String item_string = item.getString("UTF-8"); //$NON-NLS-1$

+          log.debug("  form field string = " + item_string); //$NON-NLS-1$

+        }

+        else

+        {

+          log.debug("  filename = " + item.getName()); //$NON-NLS-1$

+          log.debug("  filesize = " + item.getSize()); //$NON-NLS-1$

+        }

+

+        if (item.getFieldName().equals(FormFields.FIELD_UPLOAD))

+        {

+          upload_fi = item;

+          continue;

+        }

+

+        if (item.getFieldName().equals(FormFields.FIELD_CONNECTOR))

+        {

+          connector_fi = item;

+          continue;

+        }

+

+        // if (item.getFieldName().equals(FormFields.FIELD_MODE))

+        // {

+        // mode_fi = item;

+        // continue;

+        // }

+

+        if (item.getFieldName().equals(FormFields.FIELD_PREVIEW))

+        {

+          preview_fi = item;

+          continue;

+        }

+

+        throw new ServletException("unrecognized POST data."); //$NON-NLS-1$

+      }

+    }

+

+    if (upload_fi == null || connector_fi == null || /* mode_fi == null || */preview_fi == null)

+    {

+      throw new ServletException("Unsufficient data provided in request."); //$NON-NLS-1$

+    }

+

+    String connector = connector_fi.getString("UTF-8"); //$NON-NLS-1$

+

+    // String mode = mode_fi.getString("UTF-8");

+    // if (!mode.equals(FormFields.VALUE_MODE_BINARY) &&

+    // !mode.equals(FormFields.VALUE_MODE_TEXTUAL))

+    // {

+    // throw new ServletException("The mode '" + mode + "' is unrecognized.");

+    // }

+

+    String preview_str = preview_fi.getString("UTF-8"); //$NON-NLS-1$

+    if (!preview_str.equals(FormFields.VALUE_TRUE) && !preview_str.equals(FormFields.VALUE_FALSE))

+    {

+      throw new ServletException("The preview '" + preview_str + "' is unrecognized.");  //$NON-NLS-1$//$NON-NLS-2$

+    }

+    boolean preview = false;

+    if (preview_str.equals(FormFields.VALUE_TRUE))

+    {

+      preview = true;

+    }

+

+    // process the request

+    log.debug("file content type =" + upload_fi.getContentType()); //$NON-NLS-1$

+    log.debug("file size = " + upload_fi.getSize()); //$NON-NLS-1$

+    if (upload_fi.getSize() <= 0)

+    {

+      throw new PDFDocumentException(250, "The document is empty."); //$NON-NLS-1$

+    }

+    byte[] document_bytes = upload_fi.get();

+

+    UploadedData ud = new UploadedData();

+    ud.preview = preview;

+    ud.sig_app = connector;

+    ud.file_name = upload_fi.getName();

+    ud.file_data = document_bytes;

+

+    return ud;

+  }

+  

+  protected List extractSignatureHoldersFromFile (String file_name, byte [] data) throws UnsupportedEncodingException, PresentableException

+  {

+    VerificationFilter vf = new VerificationFilter();

+    List signature_holders = null;

+

+    String extension = extractExtension(file_name);

+

+    String raw_text = null;

+    if (file_name == null || (extension != null && extension.equals("txt"))) //$NON-NLS-1$

+    {

+      raw_text = new String(data, "UTF-8"); //$NON-NLS-1$

+      signature_holders = vf.extractSignaturesFromPlainText(raw_text);

+    }

+    else

+    {

+      signature_holders = vf.extractSignaturesFromPdf(data);

+    }

+

+    if (signature_holders.size() == 0)

+    {

+      throw new PDFDocumentException(206, "PDF document not signed."); //$NON-NLS-1$

+    }

+

+    return signature_holders;

+  }

+

+  /**

+   * Extracts the extension from a file name string.

+   * 

+   * <p>

+   * The extension of a file name is whatever text follows the last '.'.

+   * </p>

+   * 

+   * @param file_name

+   *          The file name.

+   * @return Returns the extension. If the file name ends with the '.', then an

+   *         empty string is returned. If the file name doesn't contain any '.'

+   *         or file_name is null, null is returned.

+   */

+  public static String extractExtension(String file_name)

+  {

+    if (file_name == null)

+    {

+      return null;

+    }

+

+    int dot_index = file_name.lastIndexOf('.');

+    if (dot_index < 0)

+    {

+      return null;

+    }

+    return file_name.substring(dot_index + 1);

+  }

+

+  protected static class UploadedData

+  {

+    protected boolean preview = false;

+

+    protected String sig_app = null;

+

+    protected String file_name = null;

+

+    protected byte[] file_data = null;

+  }

+}
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