#5185 #5144 Prevent caching, don't return CSV nulls

@@ -275,6 +275,18 @@ public class DirectControlServlet extends HttpServlet {
                 response.setStatus(400);
             }
 
+            // Set to expire far in the past.
+            response.setHeader("Expires", "Sat, 6 May 1995 12:00:00 GMT");
+
+            // Set standard HTTP/1.1 no-cache headers.
+            response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
+
+            // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
+            response.addHeader("Cache-Control", "post-check=0, pre-check=0");
+
+            // Set standard HTTP/1.0 no-cache header.
+            response.setHeader("Pragma", "no-cache");
+
             if ("JSON".equals(outputHandler)) {
                 response.setContentType("application/x-json");
 
@@ -313,7 +325,8 @@ public class DirectControlServlet extends HttpServlet {
                     }
 
                     if (data.size() > 0) {
-                        Iterator hi = ((Map) data.get(0)).keySet().iterator();
+                        Set keys = ((Map) data.get(0)).keySet();
+                        Iterator hi = keys.iterator();
                         StringBuffer csvBuf = new StringBuffer();
                         while(hi.hasNext()) {
                             csvBuf.append(hi.next());
@@ -322,10 +335,11 @@ public class DirectControlServlet extends HttpServlet {
                         writer.println(csvBuf);
 
                         for (Map row : data) {
-                            Iterator i = row.values().iterator();
+                            Iterator i = keys.iterator();
                             csvBuf = new StringBuffer();
                             while(i.hasNext()) {
-                                csvBuf.append(i.next());
+                                Object val = row.get(i.next());
+                                if (!"null".equals("" + val)) csvBuf.append(val);
                                 if (i.hasNext()) csvBuf.append(",");
                             }
                             writer.println(csvBuf);

@@ -53,8 +53,8 @@ public class LibreOfficeRenderer {
 
             ProcessBuilder pb = new ProcessBuilder("libreoffice", "--headless", "--convert-to", "pdf", outputFile.getPath(), "--outdir", outputFile.getParentFile().getPath());
             Map<String, String> env = pb.environment();
-            env.put("HOME", "/home/ofbiz");
-            env.put("USERNAME", "ofbiz");
+            env.put("HOME", "/home/driverup");
+            env.put("USERNAME", "driverup");
             Process process = pb.start();
             InputStream is = process.getInputStream();
             process.waitFor();