LibreOffice render helper #3913

@@ -141,9 +141,7 @@ public class DirectControlServlet extends HttpServlet {
                 }
             } else {
                 // Check if the request is a backbone style "emulateJSON" request
-                if (contentType != null &&
-			contentType.indexOf("x-www-form-urlencoded") != -1 &&
-			request.getParameter("model") != null) {
+                if (contentType != null && contentType.indexOf("x-www-form-urlencoded") != -1 && request.getParameter("model") != null) {
                     Debug.logInfo("MODEL: " + request.getParameter("model"), module);
                     JSON json = new JSON(new StringReader(request.getParameter("model")));
                     Map<String,Object> items = json.JSONObject();
@@ -186,6 +184,14 @@ public class DirectControlServlet extends HttpServlet {
                 }
             }
 
+            // Check if there is an output handler
+            String outputHandler = "JSON";
+            if (serviceName.indexOf("|") != -1) {
+                String[] parts = serviceName.split("\\|");
+                serviceName = parts[0];
+                outputHandler = parts[1];
+            }
+
             Debug.logInfo("Service name" +serviceName + " mapped for " + pathInfo + "#" + method, module);
 
             // If the sessionId parameter is set, attempt to look up the corresponding
@@ -243,20 +249,25 @@ public class DirectControlServlet extends HttpServlet {
                 response.setStatus(400);
             }
 
-            response.setContentType("application/x-json");
+            if ("JSON".equals(outputHandler)) {
+                response.setContentType("application/x-json");
 
-            PrintWriter writer = response.getWriter();
+                PrintWriter writer = response.getWriter();
 
-            JsonConfig jsonConfig = new JsonConfig();
-            jsonConfig.registerJsonValueProcessor(Date.class, new ISODateValueProcessor());
-            jsonConfig.registerJsonValueProcessor(Timestamp.class, new ISODateValueProcessor());
-            JSONObject json = JSONObject.fromObject(result, jsonConfig);
-            String jsonStr = json.toString();
-            response.setContentLength(jsonStr.getBytes("UTF8").length);
-            writer.write(jsonStr);
+                JsonConfig jsonConfig = new JsonConfig();
+                jsonConfig.registerJsonValueProcessor(Date.class, new ISODateValueProcessor());
+                jsonConfig.registerJsonValueProcessor(Timestamp.class, new ISODateValueProcessor());
+                JSONObject json = JSONObject.fromObject(result, jsonConfig);
+                String jsonStr = json.toString();
+                response.setContentLength(jsonStr.getBytes("UTF8").length);
+                writer.write(jsonStr);
+                writer.flush();
+                writer.close();
+            }
 
-            writer.flush();
-            writer.close();
+            if ("PDF".equals(outputHandler)) {
+                LibreOfficeRenderer.service(request, response, result);
+            }
         } catch (Throwable t) {
             response.setStatus(500);
             PrintWriter writer = response.getWriter();

+package com.brainfood.ofbiz;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import java.util.Map;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import java.io.File;
+import java.io.InputStream;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+import org.ofbiz.base.util.UtilIO;
+
+import groovy.text.SimpleTemplateEngine;
+import groovy.text.Template;
+import groovy.lang.Writable;
+
+public class LibreOfficeRenderer {
+    public static void service(HttpServletRequest request, HttpServletResponse response, Map<String, Object> context) 
+        throws InterruptedException, IOException, ClassNotFoundException {
+        Object templateFile = context.get("_template");
+
+        if (templateFile != null) {
+            String template = UtilIO.readString(new FileInputStream(templateFile.toString()));
+
+            // FIXME: This is a hack. The Libreoffice file contains a $ declaration and this fixes it.
+            context.put("Linux_X86_64", "$Linux_X86_64");
+            context.put("Build", "$Build");
+
+            SimpleTemplateEngine engine = new SimpleTemplateEngine();
+            Writable stTemplate = engine.createTemplate(template).make(context);
+            String output = stTemplate.toString();
+
+            File outputFile = File.createTempFile("bfdcs-", "-tmpl");
+            UtilIO.writeString(outputFile, output);
+
+            List<String> args = Arrays.asList(new String[]{"libreoffice", "--headless", "--convert-to", "pdf", outputFile.getPath(), "--outdir", "/tmp"});
+            Process process = new ProcessBuilder(args).start();
+            InputStream is = process.getInputStream();
+            process.waitFor();
+
+            response.setContentType("application/pdf");
+            UtilIO.copy(new FileInputStream(outputFile.getPath() + ".pdf"), true, response.getOutputStream(), true);
+
+            outputFile.delete();
+            new File(outputFile.getPath() + ".pdf").delete();
+        }
+    }
+}