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authorAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2014-07-01 17:21:59 +0200
committerAndreas Fitzek <andreas.fitzek@iaik.tugraz.at>2014-07-01 17:21:59 +0200
commit8e71c5c2fe0bbd588b95dd4158dd1e378c146e07 (patch)
treee50b1571d4610ddd796a6d1d9d8880bb40153aca /pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets
parentb9e719489508322ce5aff5bdf67c72ce8c2e7c76 (diff)
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PDF-AS Web Signature Block Preview Service
Diffstat (limited to 'pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets')
-rw-r--r--pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/VisBlockServlet.java94
1 files changed, 94 insertions, 0 deletions
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/VisBlockServlet.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/VisBlockServlet.java
new file mode 100644
index 00000000..3008c25e
--- /dev/null
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/VisBlockServlet.java
@@ -0,0 +1,94 @@
+package at.gv.egiz.pdfas.web.servlets;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.security.cert.CertificateException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import at.gv.egiz.pdfas.common.exceptions.PdfAsException;
+import at.gv.egiz.pdfas.web.helper.PdfAsHelper;
+
+public class VisBlockServlet extends HttpServlet {
+
+ private static final long serialVersionUID = 1L;
+
+ private static final Logger logger = LoggerFactory
+ .getLogger(VisBlockServlet.class);
+
+ private static String PARAM_PROFILE = "p";
+ private static String PARAM_RESOLUTION = "r";
+
+ /**
+ * @see HttpServlet#HttpServlet()
+ */
+ public VisBlockServlet() {
+ super();
+ }
+
+ /**
+ * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
+ * response)
+ */
+ protected void doGet(HttpServletRequest request,
+ HttpServletResponse response) throws ServletException, IOException {
+ this.process(request, response);
+ }
+
+ /**
+ * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
+ * response)
+ */
+ protected void doPost(HttpServletRequest request,
+ HttpServletResponse response) throws ServletException, IOException {
+ this.process(request, response);
+ }
+
+ protected void process(HttpServletRequest request,
+ HttpServletResponse response) throws ServletException, IOException {
+
+ try {
+
+ String profile = request.getParameter(PARAM_PROFILE);
+ String resolutionString = request.getParameter(PARAM_RESOLUTION);
+
+ int resolution = Integer.parseInt(resolutionString);
+
+ if (resolution < 16 || resolution > 512) {
+ throw new ServletException(PARAM_RESOLUTION
+ + " invalid value! Out of Range");
+ }
+
+ byte[] imageData = PdfAsHelper.generateVisualBlock(profile, resolution);
+
+ if (imageData != null) {
+
+ response.setHeader("Content-Disposition", "inline;filename="
+ + profile + "_" + resolution + ".png");
+ response.setContentType("image/png");
+ OutputStream os = response.getOutputStream();
+ os.write(imageData);
+ os.close();
+ } else {
+ logger.warn("generateVisualBlock returned null!");
+ throw new ServletException("Invalid profile id");
+ }
+ } catch (NumberFormatException e) {
+ throw new ServletException(PARAM_RESOLUTION
+ + " invalid value! Not a Number");
+ } catch (CertificateException e) {
+ logger.error("CERT Error", e);
+ throw new ServletException("Failed to find certificate");
+ } catch (PdfAsException e) {
+ logger.error("PDF_AS Error", e);
+ throw new ServletException("Generic Error");
+ }
+ }
+
+}