utils compiles with python 3

VERSION

@@ -1 +1 @@
-Version 2.2.1 (2012-10-23 09:54:01) stable
+Version 2.2.1 (2012-10-23 10:11:28) stable

gluon/utils.py

@@ -21,20 +21,32 @@ import os
 import re
 import logging
 import socket
-import cPickle
 import base64
 import zlib
 
+try:
+    import cPickle as pickle # python 2
+except ImportError: 
+    import pickle            # python 3
+
+
 try:
     from Crypto.Cipher import AES
 except ImportError:
-    from contrib import aes as AES
+    try:
+        from .aes import AES
+    except ImportError:
+        from contrib.aes import AES
 
 try:
     from contrib.pbkdf2 import pbkdf2_hex
     HAVE_PBKDF2 = True
 except ImportError:
-    HAVE_PBKDF2 = False
+    try:
+        from .pbkdf2 import pbkdf2_hex
+        HAVE_PBKDF2 = True
+    except (ImportError, ValueError):
+        HAVE_PBKDF2 = False
 
 logger = logging.getLogger("web2py")
 
@@ -115,7 +127,7 @@ def pad(s, n=32, padchar='.'):
 def secure_dumps(data, encryption_key, hash_key=None, compression_level=None):
     if not hash_key:
         hash_key = hashlib.sha1(encryption_key).hexdigest()
-    dump = cPickle.dumps(data)
+    dump = pickle.dumps(data)
     if compression_level:
         dump = zlib.compress(dump, compression_level)
     key = pad(encryption_key[:32])
@@ -141,8 +153,8 @@ def secure_loads(data, encryption_key, hash_key=None, compression_level=None):
         data = data.rstrip(' ')
         if compression_level:
             data = zlib.decompress(data)
-        return cPickle.loads(data)
+        return pickle.loads(data)
-    except (TypeError, cPickle.UnpicklingError):
+    except (TypeError, pickle.UnpicklingError):
         return None
 
 ### compute constant CTOKENS
@@ -173,7 +185,10 @@ def initialize_urandom():
             # try to add process-specific entropy
             frandom = open('/dev/urandom', 'wb')
             try:
-                frandom.write(''.join(chr(t) for t in ctokens))
+                try:
+                    frandom.write(''.join(chr(t) for t in ctokens)) # python 2
+                except:
+                    frandom.write(bytes([]).join(bytes([t]) for t in ctokens)) # python 3
             finally:
                 frandom.close()
         except IOError:
@@ -185,8 +200,11 @@ def initialize_urandom():
             """Cryptographically secure session management is not possible on your system because
 your system does not provide a cryptographically secure entropy source.
 This is not specific to web2py; consider deploying on a different operating system.""")
-    unpacked_ctokens = struct.unpack('=QQ', string.join(
+    try:
-        (chr(x) for x in ctokens), ''))
+        packed = ''.join(chr(x) for x in ctokens) # python 2
+    except:
+        packed = bytes([]).join(bytes([x]) for x in ctokens) # python 3
+    unpacked_ctokens = struct.unpack('=QQ', packed)
     return unpacked_ctokens, have_urandom
 UNPACKED_CTOKENS, HAVE_URANDOM = initialize_urandom()