keys can be binary

ox/torrent/bencode3.py

@@ -24,6 +24,10 @@ def _decode_str(data):
         raise Exception('invalid string size: %d' % l)
     start += 1
     ret = bytes(data[start:start+l])
+    try:
+        ret = ret.decode('utf-8')
+    except:
+        pass
     data = data[start+l:]
     return ret, data
 
@@ -49,7 +53,7 @@ def _decode_dict(data):
     while data[0] != ord(b'e'):
         k, data = _decode_str(data)
         v, data = _decode(data)
-        d[k.decode()] = v
+        d[k] = v
     return d, data[1:]
 
 def _decode(data):