1 files changed, 100 insertions, 0 deletions
diff --git a/src/main/java/at/gv/egiz/pdfas/utils/WebUtils.java b/src/main/java/at/gv/egiz/pdfas/utils/WebUtils.java
new file mode 100644
index 0000000..4bca486
--- /dev/null
+++ b/src/main/java/at/gv/egiz/pdfas/utils/WebUtils.java
@@ -0,0 +1,100 @@
+package at.gv.egiz.pdfas.utils;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import at.knowcenter.wag.egov.egiz.cfg.SettingsReader;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingNotFoundException;
+import at.knowcenter.wag.egov.egiz.exceptions.SettingsException;
+import at.knowcenter.wag.egov.egiz.web.LocalRequestHelper;
+
+/**
+ * @author tknall
+ */
+public final class WebUtils {
+
+   private WebUtils() {
+   }
+
+   /**
+    * The log.
+    */
+   private final static Log LOG = LogFactory.getLog(WebUtils.class);
+   
+   /**
+    * The configuration key that replaces a dynamically generated retrieve signature data url.
+    */
+   private final static String RETRIEVE_SIGNATURE_DATA_URL_OVERRIDE_KEY = "retrieve_signature_data_url_override";
+   
+   /**
+    * Unlike {@link HttpServletResponse#encodeURL(String)} that adds only a
+    * {@code JSESSIONID} entry to the given url if needed, this method always
+    * adds the session id (except if already present within the url.
+    * 
+    * @param url
+    *           The given url.
+    * @param session
+    *           The {@link HttpSession}.
+    * @return The given url plus a session id.
+    */
+   public static String addJSessionID(String url, HttpSession session) {
+      if (url == null) {
+         return null;
+      }
+      if (!StringUtils.containsIgnoreCase(url, ";jsessionid=")) {
+         url = url + ";jsessionid=" + session.getId();
+         LOG.debug("Adding jsessionid " + session.getId());
+      } else {
+         LOG.debug("No need to add a jsessionid.");
+      }
+      LOG.debug("Returning url " + url);
+      return url;
+   }
+
+   /**
+    * Unlike {@link HttpServletResponse#encodeURL(String)} that adds only a
+    * {@code JSESSIONID} entry to the given url if needed, this method always
+    * adds the session id (except if already present within the url.
+    * 
+    * @param url
+    *           The given url.
+    * @param request
+    *           The {@link HttpServletRequest}.
+    * @return The given url plus a session id.
+    */
+   public static String addJSessionID(String url, HttpServletRequest request) {
+      return addJSessionID(url, request.getSession());
+   }
+   
+   /**
+    * Either dynamically creates locref content url or uses a url provides by the pdf-as
+    * configuration (key {@code retrieve_signature_data_url_override}).
+    * @param request The {@link HttpServletRequest}.
+    * @param response The {@link HttpServletResponse}.
+    * @return The retrieve signature data url.
+    */
+   public static String buildRetrieveSignatureDataURL(HttpServletRequest request, HttpServletResponse response) {
+      String override = null;
+      LOG.debug("Building retrieve signature data url.");
+      try {
+         override = SettingsReader.getInstance().getSetting(RETRIEVE_SIGNATURE_DATA_URL_OVERRIDE_KEY, null);
+      } catch (SettingsException e) {
+         LOG.error(e);
+      }
+      String result;
+      if (override == null) {
+         result = WebUtils.addJSessionID(LocalRequestHelper.getLocalContextAddress(request, response) + "/RetrieveSignatureData", request);         
+      } else {
+         LOG.debug("Override url found: " + override);
+         result = WebUtils.addJSessionID(override, request);         
+      }
+      LOG.debug("RetrieveSignatureDataURL = " + result);
+      return result;
+   }
+
+}