improve display of non-ascii contents

fixes #283

1 files changed, 7 insertions, 6 deletions

diff --git a/libmproxy/utils.py b/libmproxy/utils.py
index 4b591250..8bd843a0 100644
--- a/libmproxy/utils.py
+++ b/libmproxy/utils.py
@@ -1,4 +1,4 @@
-from __future__ import absolute_import
+from __future__ import (absolute_import, print_function, division)
 import os
 import datetime
 import re
@@ -30,15 +30,16 @@ def isBin(s):
     """
     for i in s:
         i = ord(i)
-        if i < 9:
-            return True
-        elif i > 13 and i < 32:
-            return True
-        elif i > 126:
+        if i < 9 or 13 < i < 32 or 126 < i:
             return True
     return False
 
 
+def isMostlyBin(s):
+    s = s[:100]
+    return sum(isBin(ch) for ch in s)/len(s) > 0.3
+
+
 def isXML(s):
     for i in s:
         if i in "\n \t":