1 files changed, 16 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/helper/BufferUtil.java b/src/main/java/org/traccar/helper/BufferUtil.java
index d1025f548..b453c437f 100644
--- a/src/main/java/org/traccar/helper/BufferUtil.java
+++ b/src/main/java/org/traccar/helper/BufferUtil.java
@@ -71,4 +71,20 @@ public final class BufferUtil {
         }
     }
 
+    public static boolean isPrintable(ByteBuf buf, int length) {
+        boolean printable = true;
+        for (int i = 0; i < length; i++) {
+            byte b = buf.getByte(buf.readerIndex() + i);
+            if (b < 32 && b != '\r' && b != '\n') {
+                printable = false;
+                break;
+            }
+        }
+        return printable;
+    }
+
+    public static String readString(ByteBuf buf, int length) {
+        return buf.readCharSequence(length, StandardCharsets.US_ASCII).toString();
+    }
+
 }