+++ /dev/null
-import types, string, re
-
-"""
-Unserialize class for the PHP serialization format.
-
-@version v0.4 BETA
-@author Scott Hurring; scott at hurring dot com
-@copyright Copyright (c) 2005 Scott Hurring
-@license http://opensource.org/licenses/gpl-license.php GNU Public License
-$Id: PHPUnserialize.py,v 1.1 2006/01/08 21:53:19 shurring Exp $
-
-Most recent version can be found at:
-http://hurring.com/code/python/phpserialize/
-
-Usage:
-# Create an instance of the unserialize engine
-u = PHPUnserialize()
-# unserialize some string into python data
-data = u.unserialize(serialized_string)
-
-Please see README.txt for more information.
-"""
-
-class PHPUnserialize(object):
- """
- Class to unserialize something from the PHP Serialize format.
-
- Usage:
- u = PHPUnserialize()
- data = u.unserialize(serialized_string)
- """
-
- def __init__(self):
- pass
-
- def session_decode(self, data):
- """Thanks to Ken Restivo for suggesting the addition
- of session_encode
- """
- session = {}
- while len(data) > 0:
- m = re.match('^(\w+)\|', data)
- if m:
- key = m.group(1)
- offset = len(key)+1
- (dtype, dataoffset, value) = self._unserialize(data, offset)
- offset = offset + dataoffset
- data = data[offset:]
- session[key] = value
- else:
- # No more stuff to decode
- return session
-
- return session
-
- def unserialize(self, data):
- return self._unserialize(data, 0)[2]
-
- def _unserialize(self, data, offset=0):
- """
- Find the next token and unserialize it.
- Recurse on array.
-
- offset = raw offset from start of data
-
- return (type, offset, value)
- """
-
- buf = []
- dtype = string.lower(data[offset:offset+1])
-
- #print "# dtype =", dtype
-
- # 't:' = 2 chars
- dataoffset = offset + 2
- typeconvert = lambda x : x
- chars = datalength = 0
-
- # int => Integer
- if dtype == 'i':
- typeconvert = lambda x : int(x)
- (chars, readdata) = self.read_until(data, dataoffset, ';')
- # +1 for end semicolon
- dataoffset += chars + 1
-
- # bool => Boolean
- elif dtype == 'b':
- typeconvert = lambda x : (int(x) == 1)
- (chars, readdata) = self.read_until(data, dataoffset, ';')
- # +1 for end semicolon
- dataoffset += chars + 1
-
- # double => Floating Point
- elif dtype == 'd':
- typeconvert = lambda x : float(x)
- (chars, readdata) = self.read_until(data, dataoffset, ';')
- # +1 for end semicolon
- dataoffset += chars + 1
-
- # n => None
- elif dtype == 'n':
- readdata = None
-
- # s => String
- elif dtype == 's':
- (chars, stringlength) = self.read_until(data, dataoffset, ':')
- # +2 for colons around length field
- dataoffset += chars + 2
-
- # +1 for start quote
- (chars, readdata) = self.read_chars(data, dataoffset+1, int(stringlength))
- # +2 for endquote semicolon
- dataoffset += chars + 2
-
- if chars != int(stringlength) != int(readdata):
- raise Exception("String length mismatch")
-
- # array => Dict
- # If you originally serialized a Tuple or List, it will
- # be unserialized as a Dict. PHP doesn't have tuples or lists,
- # only arrays - so everything has to get converted into an array
- # when serializing and the original type of the array is lost
- elif dtype == 'a':
- readdata = {}
-
- # If all dict keys are increasing ints from zero,
- # then make it a list.
- # Else,
- # just return the original dict
- def is_list(keys):
- # list with no elements
- if len(keys) == 0:
- return True
- # list with one element: 0
- if len(keys) == 1:
- if type(keys[0]) == int and keys[0] == 0:
- return True
- else:
- return False
-
- # all other cases
- for i in range(1,len(keys)):
- x = keys[i-1]
- y = keys[i]
- if type(x) == int and type(y) == int and y-x == 1:
- continue
- else:
- return False
- return True
-
- # Empty {} and empty [] are ambiguous.
- # A default could either be configured or assumed to be a list?
- def dict_to_list(dict):
-
- keys = dict.keys()
- keys.sort()
-
- if is_list(keys):
- return [dict[k] for k in keys]
- else:
- return dict
-
- typeconvert = lambda x : dict_to_list(x)
-
- # How many keys does this list have?
- (chars, keys) = self.read_until(data, dataoffset, ':')
- # +2 for colons around length field
- dataoffset += chars + 2
-
- # Loop through and fetch this number of key/value pairs
- for i in range(0, int(keys)):
- # Read the key
- (ktype, kchars, key) = self._unserialize(data, dataoffset)
- dataoffset += kchars
- #print "Key(%i) = (%s, %i, %s) %i" % (i, ktype, kchars, key, dataoffset)
-
- # Read value of the key
- (vtype, vchars, value) = self._unserialize(data, dataoffset)
- dataoffset += vchars
- #print "Value(%i) = (%s, %i, %s) %i" % (i, vtype, vchars, value, dataoffset)
-
- # Set the list element
- readdata[key] = value
-
- # +1 for end semicolon
- dataoffset += 1
- #chars = int(dataoffset) - start
-
- # I don't know how to unserialize this
- else:
- raise Exception("Unknown / Unhandled data type (%s)!" % dtype)
-
-
- return (dtype, dataoffset-offset, typeconvert(readdata))
-
- def read_until(self, data, offset, stopchar):
- """
- Read from data[offset] until you encounter some char 'stopchar'.
- """
- buf = []
- char = data[offset:offset+1]
- i = 2
- while char != stopchar:
- # Consumed all the characters and havent found ';'
- if i+offset > len(data):
- raise Exception("Invalid")
- buf.append(char)
- char = data[offset+(i-1):offset+i]
- i += 1
-
- # (chars_read, data)
- return (len(buf), "".join(buf))
-
- def read_chars(self, data, offset, length):
- """
- Read 'length' number of chars from data[offset].
- """
- buf = []
- # Account for the starting quote char
- #offset += 1
- for i in range(0, length):
- char = data[offset+(i-1):offset+i]
- buf.append(char)
-
- # (chars_read, data)
- return (len(buf), "".join(buf))
-
-
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