Create the global upload limit controller

This controller will allow for every page and template to load the variables used for upload limit displaying and enforcing

src/main/java/stirling/software/SPDF/controller/web/GlobalUploadLimitWebController.java

@@ -0,0 +1,30 @@
+package stirling.software.SPDF.controller.web;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ModelAttribute;
+
+@Component
+@ControllerAdvice
+public class GlobalUploadLimitWebController {
+
+    @Autowired() private long uploadLimit;
+
+    @ModelAttribute("uploadLimit")
+    public long populateUploadLimit() {
+        return uploadLimit;
+    }
+
+    @ModelAttribute("uploadLimitReadable")
+    public String populateReadableLimit() {
+        return humanReadableByteCount(uploadLimit);
+    }
+
+    private String humanReadableByteCount(long bytes) {
+        if (bytes < 1024) return bytes + " B";
+        int exp = (int) (Math.log(bytes) / Math.log(1024));
+        String pre = "KMGTPE".charAt(exp - 1) + "B";
+        return String.format("%.1f %s", bytes / Math.pow(1024, exp), pre);
+    }
+}