Improve output: distinguish between failed assertions (failures) and unexpected exceptions (errors), and print a filtered stack trace for any exception.

webapp/web/fileupload/datastreamModification.jsp

@@ -0,0 +1,23 @@
+<%-- $This file is distributed under the terms of the license in /doc/license.txt$ --%>
+
+<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
+
+<%/* this is used by the FedoraDatastreamController and not by the N3 editing system.*/%>
+
+<h2>Upload a replacement for ${fileName}</h2>
+  <form action="<c:url value="/fedoraDatastreamController"/>"
+        enctype="multipart/form-data" method="POST">
+
+    <p>File <input type="file" id="fileRes" name="fileRes" /></p>
+    
+   <%/*  <p><input type="radio" name="useNewName" value="false" checked/>
+      use existing file name</p>
+    <p><input type="radio" name="useNewName" value="true"/>
+      rename file to name of file being uploaded</p> */%>
+
+    <input type="hidden" name="fileUri" value="${fileUri}"/>
+    <input type="hidden" name="pid" value="${pid}"/>
+    <input type="hidden" name="dsid" value="${dsid}"/>
+
+    <input type="submit" id="submit" value="submit" />
+  </form>