PDF-AS web Developments

1 files changed, 205 insertions, 0 deletions

diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java
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+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/ExternSignServlet.java
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+package at.gv.egiz.pdfas.web.servlets;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.List;
+
+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.disk.DiskFileItemFactory;
+import org.apache.commons.fileupload.servlet.ServletFileUpload;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.lib.api.sign.IPlainSigner;
+import at.gv.egiz.pdfas.sigs.pades.PAdESSigner;
+import at.gv.egiz.pdfas.web.exception.PdfAsWebException;
+import at.gv.egiz.pdfas.web.helper.PdfAsHelper;
+import at.gv.egiz.pdfas.web.helper.PdfAsParameterExtractor;
+import at.gv.egiz.pdfas.web.helper.RemotePDFFetcher;
+import at.gv.egiz.sl.util.BKUSLConnector;
+import at.gv.egiz.sl.util.MOAConnector;
+
+/**
+ * Servlet implementation class Sign
+ */
+public class ExternSignServlet extends HttpServlet {
+
+	private static final long serialVersionUID = 1L;
+
+	private static final String UPLOAD_PDF_DATA = "pdfFile";
+	private static final String UPLOAD_DIRECTORY = "upload";
+	private static final int THRESHOLD_SIZE = 1024 * 1024 * 3; // 3MB
+	private static final int MAX_FILE_SIZE = 1024 * 1024 * 40; // 40MB
+	private static final int MAX_REQUEST_SIZE = 1024 * 1024 * 50; // 50MB
+
+	private static final Logger logger = LoggerFactory
+			.getLogger(ExternSignServlet.class);
+	
+	/**
+	 * Default constructor.
+	 */
+	public ExternSignServlet() {
+	}
+
+	protected void doGet(HttpServletRequest request,
+			HttpServletResponse response) throws ServletException, IOException {
+		
+		System.out.println("Get signing request");
+		logger.info("Get signing request");
+		
+		String errorUrl = PdfAsParameterExtractor.getInvokeErrorURL(request);
+		PdfAsHelper.setErrorURL(request, response, errorUrl);
+		try {
+			// Mandatory Parameters on Get Request:
+			String invokeUrl = PdfAsParameterExtractor.getInvokeURL(request);
+			PdfAsHelper.setInvokeURL(request, response, invokeUrl);
+
+			String pdfUrl = PdfAsParameterExtractor.getPdfUrl(request);
+
+			if (pdfUrl == null) {
+				throw new PdfAsWebException(
+						"No PDF URL given! Use POST request to sign without PDF URL.");
+			}
+
+			byte[] pdfData = RemotePDFFetcher.fetchPdfFile(pdfUrl);
+			doSignature(request, response, pdfData);
+		} catch (Exception e) {
+			PdfAsHelper.setSessionException(request, response, e.getMessage(),
+					e);
+			PdfAsHelper.gotoError(getServletContext(), request, response);
+		}
+	}
+
+	/**
+	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
+	 *      response)
+	 */
+	protected void doPost(HttpServletRequest request,
+			HttpServletResponse response) throws ServletException, IOException {
+		
+		System.out.println("Post signing request");
+		logger.info("Post signing request");
+		
+		String errorUrl = PdfAsParameterExtractor.getInvokeErrorURL(request);
+		PdfAsHelper.setErrorURL(request, response, errorUrl);
+		
+		try {
+			byte[] filecontent = null;
+
+			// checks if the request actually contains upload file
+			if (!ServletFileUpload.isMultipartContent(request)) {
+				// No Uploaded data!
+				if (PdfAsParameterExtractor.getPdfUrl(request) != null) {
+					doGet(request, response);
+					return;
+				} else {
+					throw new PdfAsWebException("No Signature data defined!");
+				}
+			} else {
+				// configures upload settings
+				DiskFileItemFactory factory = new DiskFileItemFactory();
+				factory.setSizeThreshold(THRESHOLD_SIZE);
+				factory.setRepository(new File(System
+						.getProperty("java.io.tmpdir")));
+
+				ServletFileUpload upload = new ServletFileUpload(factory);
+				upload.setFileSizeMax(MAX_FILE_SIZE);
+				upload.setSizeMax(MAX_REQUEST_SIZE);
+
+				// constructs the directory path to store upload file
+				String uploadPath = getServletContext().getRealPath("")
+						+ File.separator + UPLOAD_DIRECTORY;
+				// creates the directory if it does not exist
+				File uploadDir = new File(uploadPath);
+				if (!uploadDir.exists()) {
+					uploadDir.mkdir();
+				}
+
+				List formItems = upload.parseRequest(request);
+				logger.debug(formItems.size() + " Items in form data");
+				if (formItems.size() < 1) {
+					// No Uploaded data!
+					// Try do get
+					// No Uploaded data!
+					if (PdfAsParameterExtractor.getPdfUrl(request) != null) {
+						doGet(request, response);
+						return;
+					} else {
+						throw new PdfAsWebException(
+								"No Signature data defined!");
+					}
+				} else {
+					for(int i = 0; i < formItems.size(); i++) {
+						Object obj = formItems.get(i);
+						if(obj instanceof FileItem) {
+							FileItem item = (FileItem) obj;
+							if(item.getFieldName().equals(UPLOAD_PDF_DATA)) {
+								filecontent = item.get();
+								logger.debug("Found pdf Data!");
+							} else {
+								request.setAttribute(item.getFieldName(), item.getString());
+								logger.debug("Setting " + item.getFieldName() + " = " + item.getString());
+							}
+						} else {
+							logger.info(obj.getClass().getName() +  " - " + obj.toString());
+						}
+					}
+				}
+			}
+			
+			if(filecontent == null) {
+				if (PdfAsParameterExtractor.getPdfUrl(request) != null) {
+					filecontent = RemotePDFFetcher.fetchPdfFile(PdfAsParameterExtractor.getPdfUrl(request));
+				}
+			}
+
+			if(filecontent == null) {
+				throw new PdfAsException("No Signature data available");
+			}
+			
+			doSignature(request, response, filecontent);
+		} catch (Exception e) {
+			PdfAsHelper.setSessionException(request, response, e.getMessage(),
+					e);
+			PdfAsHelper.gotoError(getServletContext(), request, response);
+		}
+	}
+
+	protected void doSignature(HttpServletRequest request,
+			HttpServletResponse response, byte[] pdfData) throws Exception {
+		// Get Connector
+		String connector = PdfAsParameterExtractor.getConnector(request);
+
+		String invokeUrl = PdfAsParameterExtractor.getInvokeURL(request);
+		PdfAsHelper.setInvokeURL(request, response, invokeUrl);
+		
+		String errorUrl = PdfAsParameterExtractor.getInvokeErrorURL(request);
+		PdfAsHelper.setErrorURL(request, response, errorUrl);
+		
+		logger.debug("Starting signature creation with: " + connector);
+		
+		IPlainSigner signer;
+		if (connector.equals("bku") || connector.equals("onlinebku") || connector.equals("mobilebku")) {
+			// start asynchronous signature creation
+			PdfAsHelper.startSignature(request, response, getServletContext(), pdfData);
+		} else if (connector.equals("jks") || connector.equals("moa")) {
+			// start synchronous siganture creation
+			byte[] pdfSignedData = PdfAsHelper.synchornousSignature(request,
+					response, pdfData);
+			PdfAsHelper.setSignedPdf(request, response, pdfSignedData);
+			PdfAsHelper.gotoProvidePdf(getServletContext(), request, response);
+			return;
+		} else {
+			throw new PdfAsWebException("Invalid connector (bku | moa | jks)");
+		}
+
+	}
+
+}