Fix the hash computation for binary algorithms, while retaining the original way for most cases

beat/core/hash.py

@@ -41,8 +41,12 @@ import simplejson
 def _sha256(s):
   """A python2/3 replacement for :py:func:`haslib.sha256`"""
 
-  if isinstance(s, str): s = six.u(s)
-  return hashlib.sha256(s.encode('utf8')).hexdigest()
+  try:
+    if isinstance(s, str): s = six.u(s)
+    return hashlib.sha256(s.encode('utf8')).hexdigest()
+  except:
+    return hashlib.sha256(s).hexdigest()
+
 
 def _compact(text):
   return text.replace(' ', '').replace('\n', '')