Fix some encoding issues, everything is now UTF-8.

Refs: #7877

@@ -320,7 +320,7 @@ public class DirectControlServlet extends HttpServlet {
 
             if ("application/json".equals(contentType)) {
                 // Read request body as JSON and insert into the context
-                Map<String, Object> items = UtilGenerics.cast(JSON.from(UtilIO.readString(new FileReader(tmpFile))).toObject(Map.class));
+                Map<String, Object> items = UtilGenerics.cast(JSON.from(UtilIO.readString(new InputStreamReader(new FileInputStream(tmpFile), "UTF-8"))).toObject(Map.class));
                 for (Object key : items.keySet()) {
                     context.put((String) key, items.get(key));
                 }
@@ -464,12 +464,12 @@ public class DirectControlServlet extends HttpServlet {
             setResponseNoCache();
 
             if ("JSON".equals(outputHandler)) {
-                response.setContentType("application/x-json");
+                response.setContentType("application/x-json;charset=UTF-8");
 
                 PrintWriter writer = response.getWriter();
 
                 String jsonStr = JSON.from(result).toString();
-                response.setContentLength(jsonStr.getBytes("UTF8").length);
+                response.setContentLength(jsonStr.getBytes("UTF-8").length);
                 writer.write(jsonStr);
                 writer.flush();
                 writer.close();