轉(zhuǎn)載自：http://my.oschina.net/zuoan001/blog/94914

代碼如下：

#coding:utf-8 # vim: encoding=utf-8:ft=python:et:sw=4:ts=8:sts=4: # # Copyright (c) 2005 Scott Hurring. # Licensed under the GPL (undefined version).import types, string""" Serialize 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: PHPSerialize.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 serialize engine s = PHPSerialize() # serialize some python data into a string serialized_string = s.serialize(string) # encode a session list (php's session_encode) serialized_string = s.session_encode(list) """class PHPSerialize(object):"""Class to serialize data using the PHP Serialize format.Usage:serialized_string = PHPSerialize().serialize(data)serialized_string = PHPSerialize().session_encode(list)"""def __init__(self):passdef session_encode(self, session):"""Thanks to Ken Restivo for suggesting the additionof session_encode"""out = ""for (k,v) in session.items():out = out + "%s|%s" % (k, self.serialize(v))return outdef serialize(self, data):return self.serialize_value(data)def is_int(self, data):"""Determine if a string var looks like an integerTODO: Make this do what PHP does, instead of a hack"""try:int(data)return Trueexcept:return Falsedef serialize_key(self, data):"""Serialize a key, which follows different rules than whenserializing values. Many thanks to Todd DeLuca for pointingout that keys are serialized differently than values!From http://us2.php.net/manual/en/language.types.array.phpA key may be either an integer or a string.If a key is the standard representation of an integer, it will beinterpreted as such (i.e. "8" will be interpreted as int 8,while "08" will be interpreted as "08").Floats in key are truncated to integer."""# Integer, Long, Float, Boolean => integerif type(data) is types.IntType or type(data) is types.LongType \or type(data) is types.FloatType or type(data) is types.BooleanType:return "i:%s;" % int(data)# String => string or String => int (if string looks like int)elif type(data) is types.StringType:if self.is_int(data):return "i:%s;" % int(data)else:return "s:%i:\"%s\";" % (len(data), data);# None / NULL => empty stringelif type(data) is types.NoneType:return "s:0:\"\";"# I dont know how to serialize thiselse:raise Exception("Unknown / Unhandled key type (%s)!" % type(data))def serialize_value(self, data):"""Serialize a value."""# Integer => integerif type(data) is types.IntType:return "i:%s;" % data# Float, Long => doubleelif type(data) is types.FloatType or type(data) is types.LongType:return "d:%s;" % data# String => string or String => int (if string looks like int)# Thanks to Todd DeLuca for noticing that PHP strings that# look like integers are serialized as ints by PHPelif type(data) is types.StringType:if self.is_int(data):return "i:%s;" % int(data)else:return "s:%i:\"%s\";" % (len(data), data);# None / NULLelif type(data) is types.NoneType:return "N;";# Tuple and List => array# The 'a' array type is the only kind of list supported by PHP.# array keys are automagically numbered up from 0elif type(data) is types.ListType or type(data) is types.TupleType:i = 0out = []# All arrays must have keysfor k in data:out.append(self.serialize_key(i))out.append(self.serialize_value(k))i += 1return "a:%i:{%s}" % (len(data), "".join(out))# Dict => array# Dict is the Python analogy of a PHP arrayelif type(data) is types.DictType:out = []for k in data:out.append(self.serialize_key(k))out.append(self.serialize_value(data[k]))return "a:%i:{%s}" % (len(data), "".join(out))# Boolean => boolelif type(data) is types.BooleanType:return "b:%i;" % (data == 1)# I dont know how to serialize thiselse:raise Exception("Unknown / Unhandled data type (%s)!" % type(data))#!/usr/bin/env python2.4 # vim: encoding=utf-8:ft=python:et:sw=4:ts=8:sts=4: # # Copyright (c) 2005 Scott Hurring. # Licensed under the GPL (undefined version).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) """class PHPUnserialize(object):"""Class to unserialize something from the PHP Serialize format.Usage:u = PHPUnserialize()data = u.unserialize(serialized_string)"""def __init__(self):passdef session_decode(self, data):"""Thanks to Ken Restivo for suggesting the additionof 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 + dataoffsetdata = data[offset:]session[key] = valueelse:# No more stuff to decodereturn sessionreturn sessiondef 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 datareturn (type, offset, value)"""buf = []dtype = string.lower(data[offset:offset+1])#print "# dtype =", dtype# 't:' = 2 charsdataoffset = offset + 2typeconvert = lambda x : xchars = datalength = 0# int => Integerif dtype == 'i':typeconvert = lambda x : int(x)(chars, readdata) = self.read_until(data, dataoffset, ';')# +1 for end semicolondataoffset += chars + 1# bool => Booleanelif dtype == 'b':typeconvert = lambda x : (int(x) == 1)(chars, readdata) = self.read_until(data, dataoffset, ';')# +1 for end semicolondataoffset += chars + 1# double => Floating Pointelif dtype == 'd':typeconvert = lambda x : float(x)(chars, readdata) = self.read_until(data, dataoffset, ';')# +1 for end semicolondataoffset += chars + 1# n => Noneelif dtype == 'n':readdata = None# s => Stringelif dtype == 's':(chars, stringlength) = self.read_until(data, dataoffset, ':')# +2 for colons around length fielddataoffset += chars + 2# +1 for start quote(chars, readdata) = self.read_chars(data, dataoffset+1, int(stringlength))# +2 for endquote semicolondataoffset += chars + 2if 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 lostelif dtype == 'a':readdata = {}# How many keys does this list have?(chars, keys) = self.read_until(data, dataoffset, ':')# +2 for colons around length fielddataoffset += chars + 2# Loop through and fetch this number of key/value pairsfor 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 elementreaddata[key] = value# +1 for end semicolondataoffset += 1#chars = int(dataoffset) - start# I don't know how to unserialize thiselse: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 = 2while 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 += 1for i in range(0, length):char = data[offset+(i-1):offset+i]buf.append(char)# (chars_read, data)return (len(buf), "".join(buf))def dumps(data, protocol=None):return PHPSerialize().serialize(data)def loads(data):return PHPUnserialize().unserialize(data)

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