Python 2 to 3 conversions

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/f2f200910@166 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/cc/python/ISC/CC/Message.py

@@ -13,6 +13,9 @@
 # NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 # WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+# XXX
+from ISC.Util import hexdump
+
 import sys
 import struct
 
@@ -35,16 +38,13 @@ def to_wire(items):
     """Encode a dict into wire format.
     >>> wire_format = Message.to_wire({"a": "b"})
     """
-    ret = []
-    ret.append(struct.pack(">I", PROTOCOL_VERSION))
-    ret.append(_encode_hash(items))
-    return (''.join(ret))
+    return struct.pack(">I", PROTOCOL_VERSION) + _encode_hash(items)
 
 def _encode_tag(tag):
     """Encode a single UTF-8 tag.
     ... wire_partial = Message._encode_tag('this')
     """
-    return(struct.pack(">B", len(str(tag))) + str(tag))
+    return(struct.pack(">B", len(tag)) + bytearray(tag, 'utf-8'))
 
 def _encode_length_and_type(data, datatype):
     """Helper method to handle the length encoding in one place."""
@@ -52,22 +52,19 @@ def _encode_length_and_type(data, datatype):
         return(struct.pack(">B", _ITEM_NULL))
     length = len(data)
     if length < 0x0000100:
-        return(struct.pack(">B B", datatype | _ITEM_LENGTH_8, length)
-               + data)
+        return(struct.pack(">B B", datatype | _ITEM_LENGTH_8, length) + data)
     elif length < 0x00010000:
-        return(struct.pack(">B H", datatype | _ITEM_LENGTH_16, length)
-               + data)
+        return(struct.pack(">B H", datatype | _ITEM_LENGTH_16, length) + data)
     else:
         return(struct.pack(">B I", datatype, length) + data)
 
 def _pack_string(item):
     """Pack a string (data) and its type/length prefix."""
-    return (_encode_length_and_type(item, _ITEM_DATA))
+    return (_encode_length_and_type(bytearray(item, 'utf-8'), _ITEM_DATA))
 
 def _pack_array(item):
     """Pack a list (array) and its type/length prefix."""
-    return (_encode_length_and_type(_encode_array(item),
-                                         _ITEM_LIST))
+    return (_encode_length_and_type(_encode_array(item), _ITEM_LIST))
 
 def _pack_hash(item):
     """Pack a dict (hash) and its type/length prefix."""
@@ -90,24 +87,26 @@ def _encode_item(item):
         return (_pack_hash(item))
     elif type(item) == list:
         return (_pack_array(item))
+    elif type(item) in (bytearray, bytes):
+        return (_pack_string(item.decode()))
     else:
         return (_pack_string(str(item)))
 
 def _encode_array(item):
     """Encode an array, where each value is encoded recursively"""
-    ret = []
+    ret = bytearray()
     for i in item:
-        ret.append(_encode_item(i))
-    return (''.join(ret))
+        ret += _encode_item(i)
+    return ret
 
 def _encode_hash(item):
     """Encode a hash, where each value is encoded recursively"""
 
-    ret = []
+    ret = bytearray()
     for key, value in item.items():
-        ret.append(_encode_tag(key))
-        ret.append(_encode_item(value))
-    return (''.join(ret))
+        ret += _encode_tag(key)
+        ret += _encode_item(value)
+    return ret
 
 #
 # decode methods
@@ -125,15 +124,15 @@ def from_wire(data):
 def _decode_tag(data):
     if len(data) < 1:
         raise DecodeError("Data underrun while decoding")
-    length = struct.unpack(">B", data[0])[0]
+    length = data[0]
     if len(data) - 1 < length:
         raise DecodeError("Data underrun while decoding")
-    return [data[1:length + 1], data[length + 1:]]
+    return [data[1:length + 1].decode(), data[length + 1:]]
 
 def _decode_item(data):
     if len(data) < 1:
         raise DecodeError("Data underrun while decoding")
-    type_and_length_format = struct.unpack(">B", data[0])[0]
+    type_and_length_format = data[0]
     item_type = type_and_length_format & _ITEM_MASK
     length_format = type_and_length_format & _ITEM_LENGTH_MASK
 
@@ -143,7 +142,7 @@ def _decode_item(data):
         if length_format == _ITEM_LENGTH_8:
             if len(data) - 1 < 1:
                 raise DecodeError("Data underrun while decoding")
-            length = struct.unpack(">B", data[1])[0]
+            length = data[1]
             data = data[2:]
         elif length_format == _ITEM_LENGTH_16:
             if len(data) - 1 < 2:

src/lib/cc/python/ISC/CC/session.py

@@ -13,6 +13,10 @@
 # NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 # WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
+# XXX
+import pprint
+from ISC.Util import hexdump
+
 import sys
 import socket
 import struct
@@ -27,9 +31,9 @@ class Session:
     def __init__(self):
         self._socket = None
         self._lname = None
-        self._recvbuffer = ""
+        self._recvbuffer = bytearray()
         self._recvlength = None
-        self._sendbuffer = ""
+        self._sendbuffer = bytearray()
         self._sequence = 1
 
         try:
@@ -81,7 +85,7 @@ class Session:
             if len(self._recvbuffer) < 4:
                 return None
             self._recvlength = struct.unpack('>I', self._recvbuffer)[0]
-            self._recvbuffer = ""
+            self._recvbuffer = bytearray()
 
         length = self._recvlength - len(self._recvbuffer)
         while (length > 0):
@@ -94,7 +98,7 @@ class Session:
             self._recvbuffer += data
             length -= len(data)
         data = self._recvbuffer
-        self._recvbuffer = ""
+        self._recvbuffer = bytearray()
         self._recvlength = None
         return (data)
 

src/lib/cc/python/ISC/Util/hexdump.py

@@ -4,10 +4,10 @@ _FILTER=''.join([(len(repr(chr(x)))==3) and chr(x) or '.' for x in range(256)])
 
 def hexdump(src, length=16):
     result=[]
-    for i in xrange(0, len(src), length):
+    for i in range(0, len(src), length):
         s = src[i:i+length]
-        hexa = ' '.join(["%02X" % ord(x) for x in s])
-        printable = s.translate(_FILTER)
+        hexa = ' '.join(["%02X" % x for x in s])
+        printable = s.decode().translate(_FILTER)
         item = "%08X   %-*s   %s\n" % (i, length * 3, hexa, printable)
         result.append(item[0:34] + ' ' + item[34:])
     print(''.join(result))

src/lib/cc/python/test.py

@@ -8,10 +8,10 @@ ss = { "list": [ 1, 2, 3 ],
 s = ISC.CC.Message.to_wire(ss)
 ISC.Util.hexdump(s)
 
-print ISC.CC.Message.from_wire(s)
+print(ISC.CC.Message.from_wire(s))
 
 tcp = ISC.CC.Session()
-print tcp.lname
+print(tcp.lname)
 
 tcp.group_subscribe("test")