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Edit File : cookies.py \| Size : 20.59 KB
#### # Copyright 2000 by Timothy O'Malley <timo@alum.mit.edu> # # All Rights Reserved # # Permission to use, copy, modify, and distribute this software # and its documentation for any purpose and without fee is hereby # granted, provided that the above copyright notice appear in all # copies and that both that copyright notice and this permission # notice appear in supporting documentation, and that the name of # Timothy O'Malley not be used in advertising or publicity # pertaining to distribution of the software without specific, written # prior permission. # # Timothy O'Malley DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS # SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY # AND FITNESS, IN NO EVENT SHALL Timothy O'Malley BE LIABLE FOR # ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, # WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS # ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR # PERFORMANCE OF THIS SOFTWARE. # #### # # Id: Cookie.py,v 2.29 2000/08/23 05:28:49 timo Exp # by Timothy O'Malley <timo@alum.mit.edu> # # Cookie.py is a Python module for the handling of HTTP # cookies as a Python dictionary. See RFC 2109 for more # information on cookies. # # The original idea to treat Cookies as a dictionary came from # Dave Mitchell (davem@magnet.com) in 1995, when he released the # first version of nscookie.py. # #### r""" Here's a sample session to show how to use this module. At the moment, this is the only documentation. The Basics ---------- Importing is easy... >>> from http import cookies Most of the time you start by creating a cookie. >>> C = cookies.SimpleCookie() Once you've created your Cookie, you can add values just as if it were a dictionary. >>> C = cookies.SimpleCookie() >>> C["fig"] = "newton" >>> C["sugar"] = "wafer" >>> C.output() 'Set-Cookie: fig=newton\r\nSet-Cookie: sugar=wafer' Notice that the printable representation of a Cookie is the appropriate format for a Set-Cookie: header. This is the default behavior. You can change the header and printed attributes by using the .output() function >>> C = cookies.SimpleCookie() >>> C["rocky"] = "road" >>> C["rocky"]["path"] = "/cookie" >>> print(C.output(header="Cookie:")) Cookie: rocky=road; Path=/cookie >>> print(C.output(attrs=[], header="Cookie:")) Cookie: rocky=road The load() method of a Cookie extracts cookies from a string. In a CGI script, you would use this method to extract the cookies from the HTTP_COOKIE environment variable. >>> C = cookies.SimpleCookie() >>> C.load("chips=ahoy; vienna=finger") >>> C.output() 'Set-Cookie: chips=ahoy\r\nSet-Cookie: vienna=finger' The load() method is darn-tootin smart about identifying cookies within a string. Escaped quotation marks, nested semicolons, and other such trickeries do not confuse it. >>> C = cookies.SimpleCookie() >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";') >>> print(C) Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=\012;" Each element of the Cookie also supports all of the RFC 2109 Cookie attributes. Here's an example which sets the Path attribute. >>> C = cookies.SimpleCookie() >>> C["oreo"] = "doublestuff" >>> C["oreo"]["path"] = "/" >>> print(C) Set-Cookie: oreo=doublestuff; Path=/ Each dictionary element has a 'value' attribute, which gives you back the value associated with the key. >>> C = cookies.SimpleCookie() >>> C["twix"] = "none for you" >>> C["twix"].value 'none for you' The SimpleCookie expects that all values should be standard strings. Just to be sure, SimpleCookie invokes the str() builtin to convert the value to a string, when the values are set dictionary-style. >>> C = cookies.SimpleCookie() >>> C["number"] = 7 >>> C["string"] = "seven" >>> C["number"].value '7' >>> C["string"].value 'seven' >>> C.output() 'Set-Cookie: number=7\r\nSet-Cookie: string=seven' Finis. """ # # Import our required modules # import re import string __all__ = ["CookieError", "BaseCookie", "SimpleCookie"] _nulljoin = ''.join _semispacejoin = '; '.join _spacejoin = ' '.join # # Define an exception visible to External modules # class CookieError(Exception): pass # These quoting routines conform to the RFC2109 specification, which in # turn references the character definitions from RFC2068. They provide # a two-way quoting algorithm. Any non-text character is translated # into a 4 character sequence: a forward-slash followed by the # three-digit octal equivalent of the character. Any '\' or '"' is # quoted with a preceeding '\' slash. # # These are taken from RFC2068 and RFC2109. # _LegalChars is the list of chars which don't require "'s # _Translator hash-table for fast quoting # _LegalChars = string.ascii_letters + string.digits + "!#$%&'+-.^_`\|~:" _Translator = { '\000' : '\\000', '\001' : '\\001', '\002' : '\\002', '\003' : '\\003', '\004' : '\\004', '\005' : '\\005', '\006' : '\\006', '\007' : '\\007', '\010' : '\\010', '\011' : '\\011', '\012' : '\\012', '\013' : '\\013', '\014' : '\\014', '\015' : '\\015', '\016' : '\\016', '\017' : '\\017', '\020' : '\\020', '\021' : '\\021', '\022' : '\\022', '\023' : '\\023', '\024' : '\\024', '\025' : '\\025', '\026' : '\\026', '\027' : '\\027', '\030' : '\\030', '\031' : '\\031', '\032' : '\\032', '\033' : '\\033', '\034' : '\\034', '\035' : '\\035', '\036' : '\\036', '\037' : '\\037', # Because of the way browsers really handle cookies (as opposed # to what the RFC says) we also encode , and ; ',' : '\\054', ';' : '\\073', '"' : '\\"', '\\' : '\\\\', '\177' : '\\177', '\200' : '\\200', '\201' : '\\201', '\202' : '\\202', '\203' : '\\203', '\204' : '\\204', '\205' : '\\205', '\206' : '\\206', '\207' : '\\207', '\210' : '\\210', '\211' : '\\211', '\212' : '\\212', '\213' : '\\213', '\214' : '\\214', '\215' : '\\215', '\216' : '\\216', '\217' : '\\217', '\220' : '\\220', '\221' : '\\221', '\222' : '\\222', '\223' : '\\223', '\224' : '\\224', '\225' : '\\225', '\226' : '\\226', '\227' : '\\227', '\230' : '\\230', '\231' : '\\231', '\232' : '\\232', '\233' : '\\233', '\234' : '\\234', '\235' : '\\235', '\236' : '\\236', '\237' : '\\237', '\240' : '\\240', '\241' : '\\241', '\242' : '\\242', '\243' : '\\243', '\244' : '\\244', '\245' : '\\245', '\246' : '\\246', '\247' : '\\247', '\250' : '\\250', '\251' : '\\251', '\252' : '\\252', '\253' : '\\253', '\254' : '\\254', '\255' : '\\255', '\256' : '\\256', '\257' : '\\257', '\260' : '\\260', '\261' : '\\261', '\262' : '\\262', '\263' : '\\263', '\264' : '\\264', '\265' : '\\265', '\266' : '\\266', '\267' : '\\267', '\270' : '\\270', '\271' : '\\271', '\272' : '\\272', '\273' : '\\273', '\274' : '\\274', '\275' : '\\275', '\276' : '\\276', '\277' : '\\277', '\300' : '\\300', '\301' : '\\301', '\302' : '\\302', '\303' : '\\303', '\304' : '\\304', '\305' : '\\305', '\306' : '\\306', '\307' : '\\307', '\310' : '\\310', '\311' : '\\311', '\312' : '\\312', '\313' : '\\313', '\314' : '\\314', '\315' : '\\315', '\316' : '\\316', '\317' : '\\317', '\320' : '\\320', '\321' : '\\321', '\322' : '\\322', '\323' : '\\323', '\324' : '\\324', '\325' : '\\325', '\326' : '\\326', '\327' : '\\327', '\330' : '\\330', '\331' : '\\331', '\332' : '\\332', '\333' : '\\333', '\334' : '\\334', '\335' : '\\335', '\336' : '\\336', '\337' : '\\337', '\340' : '\\340', '\341' : '\\341', '\342' : '\\342', '\343' : '\\343', '\344' : '\\344', '\345' : '\\345', '\346' : '\\346', '\347' : '\\347', '\350' : '\\350', '\351' : '\\351', '\352' : '\\352', '\353' : '\\353', '\354' : '\\354', '\355' : '\\355', '\356' : '\\356', '\357' : '\\357', '\360' : '\\360', '\361' : '\\361', '\362' : '\\362', '\363' : '\\363', '\364' : '\\364', '\365' : '\\365', '\366' : '\\366', '\367' : '\\367', '\370' : '\\370', '\371' : '\\371', '\372' : '\\372', '\373' : '\\373', '\374' : '\\374', '\375' : '\\375', '\376' : '\\376', '\377' : '\\377' } def _quote(str, LegalChars=_LegalChars): r"""Quote a string for use in a cookie header. If the string does not need to be double-quoted, then just return the string. Otherwise, surround the string in doublequotes and quote (with a \) special characters. """ if all(c in LegalChars for c in str): return str else: return '"' + _nulljoin(_Translator.get(s, s) for s in str) + '"' _OctalPatt = re.compile(r"\\[0-3][0-7][0-7]") _QuotePatt = re.compile(r"[\\].") def _unquote(str): # If there aren't any doublequotes, # then there can't be any special characters. See RFC 2109. if len(str) < 2: return str if str[0] != '"' or str[-1] != '"': return str # We have to assume that we must decode this string. # Down to work. # Remove the "s str = str[1:-1] # Check for special sequences. Examples: # \012 --> \n # \" --> " # i = 0 n = len(str) res = [] while 0 <= i < n: o_match = _OctalPatt.search(str, i) q_match = _QuotePatt.search(str, i) if not o_match and not q_match: # Neither matched res.append(str[i:]) break # else: j = k = -1 if o_match: j = o_match.start(0) if q_match: k = q_match.start(0) if q_match and (not o_match or k < j): # QuotePatt matched res.append(str[i:k]) res.append(str[k+1]) i = k + 2 else: # OctalPatt matched res.append(str[i:j]) res.append(chr(int(str[j+1:j+4], 8))) i = j + 4 return _nulljoin(res) # The _getdate() routine is used to set the expiration time in the cookie's HTTP # header. By default, _getdate() returns the current time in the appropriate # "expires" format for a Set-Cookie header. The one optional argument is an # offset from now, in seconds. For example, an offset of -3600 means "one hour # ago". The offset may be a floating point number. # _weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'] _monthname = [None, 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'] def _getdate(future=0, weekdayname=_weekdayname, monthname=_monthname): from time import gmtime, time now = time() year, month, day, hh, mm, ss, wd, y, z = gmtime(now + future) return "%s, %02d %3s %4d %02d:%02d:%02d GMT" % \ (weekdayname[wd], day, monthname[month], year, hh, mm, ss) class Morsel(dict): """A class to hold ONE (key, value) pair. In a cookie, each such pair may have several attributes, so this class is used to keep the attributes associated with the appropriate key,value pair. This class also includes a coded_value attribute, which is used to hold the network representation of the value. This is most useful when Python objects are pickled for network transit. """ # RFC 2109 lists these attributes as reserved: # path comment domain # max-age secure version # # For historical reasons, these attributes are also reserved: # expires # # This is an extension from Microsoft: # httponly # # This dictionary provides a mapping from the lowercase # variant on the left to the appropriate traditional # formatting on the right. _reserved = { "expires" : "expires", "path" : "Path", "comment" : "Comment", "domain" : "Domain", "max-age" : "Max-Age", "secure" : "Secure", "httponly" : "HttpOnly", "version" : "Version", } _flags = {'secure', 'httponly'} def __init__(self): # Set defaults self.key = self.value = self.coded_value = None # Set default attributes for key in self._reserved: dict.__setitem__(self, key, "") def __setitem__(self, K, V): K = K.lower() if not K in self._reserved: raise CookieError("Invalid Attribute %s" % K) dict.__setitem__(self, K, V) def isReservedKey(self, K): return K.lower() in self._reserved def set(self, key, val, coded_val, LegalChars=_LegalChars): # First we verify that the key isn't a reserved word # Second we make sure it only contains legal characters if key.lower() in self._reserved: raise CookieError("Attempt to set a reserved key: %s" % key) if any(c not in LegalChars for c in key): raise CookieError("Illegal key value: %s" % key) # It's a good key, so save it. self.key = key self.value = val self.coded_value = coded_val def output(self, attrs=None, header="Set-Cookie:"): return "%s %s" % (header, self.OutputString(attrs)) __str__ = output def __repr__(self): return '<%s: %s=%s>' % (self.__class__.__name__, self.key, repr(self.value)) def js_output(self, attrs=None): # Print javascript return """ <script type="text/javascript"> <!-- begin hiding document.cookie = \"%s\"; // end hiding --> </script> """ % (self.OutputString(attrs).replace('"', r'\"')) def OutputString(self, attrs=None): # Build up our result # result = [] append = result.append # First, the key=value pair append("%s=%s" % (self.key, self.coded_value)) # Now add any defined attributes if attrs is None: attrs = self._reserved items = sorted(self.items()) for key, value in items: if value == "": continue if key not in attrs: continue if key == "expires" and isinstance(value, int): append("%s=%s" % (self._reserved[key], _getdate(value))) elif key == "max-age" and isinstance(value, int): append("%s=%d" % (self._reserved[key], value)) elif key == "secure": append(str(self._reserved[key])) elif key == "httponly": append(str(self._reserved[key])) else: append("%s=%s" % (self._reserved[key], value)) # Return the result return _semispacejoin(result) # # Pattern for finding cookie # # This used to be strict parsing based on the RFC2109 and RFC2068 # specifications. I have since discovered that MSIE 3.0x doesn't # follow the character rules outlined in those specs. As a # result, the parsing rules here are less strict. # _LegalKeyChars = r"\w\d!#%&'~_`><@,:/\$\\+\-\.\^\\|\)\(\?\}\{\=" _LegalValueChars = _LegalKeyChars + '\[\]' _CookiePattern = re.compile(r""" (?x) # This is a verbose pattern \s* # Optional whitespace at start of cookie (?P<key> # Start of group 'key' [""" + _LegalKeyChars + r"""]+? # Any word of at least one letter ) # End of group 'key' ( # Optional group: there may not be a value. \s=\s # Equal Sign (?P<val> # Start of group 'val' "(?:[^\\"]\|\\.)" # Any doublequoted string \| # or \w{3},\s[\w\d\s-]{9,11}\s[\d:]{8}\sGMT # Special case for "expires" attr \| # or [""" + _LegalValueChars + r"""] # Any word or empty string ) # End of group 'val' )? # End of optional value group \s* # Any number of spaces. (\s+\|;\|$) # Ending either at space, semicolon, or EOS. """, re.ASCII) # May be removed if safe. # At long last, here is the cookie class. Using this class is almost just like # using a dictionary. See this module's docstring for example usage. # class BaseCookie(dict): """A container class for a set of Morsels.""" def value_decode(self, val): """real_value, coded_value = value_decode(STRING) Called prior to setting a cookie's value from the network representation. The VALUE is the value read from HTTP header. Override this function to modify the behavior of cookies. """ return val, val def value_encode(self, val): """real_value, coded_value = value_encode(VALUE) Called prior to setting a cookie's value from the dictionary representation. The VALUE is the value being assigned. Override this function to modify the behavior of cookies. """ strval = str(val) return strval, strval def __init__(self, input=None): if input: self.load(input) def __set(self, key, real_value, coded_value): """Private method for setting a cookie's value""" M = self.get(key, Morsel()) M.set(key, real_value, coded_value) dict.__setitem__(self, key, M) def __setitem__(self, key, value): """Dictionary style assignment.""" if isinstance(value, Morsel): # allow assignment of constructed Morsels (e.g. for pickling) dict.__setitem__(self, key, value) else: rval, cval = self.value_encode(value) self.__set(key, rval, cval) def output(self, attrs=None, header="Set-Cookie:", sep="\015\012"): """Return a string suitable for HTTP.""" result = [] items = sorted(self.items()) for key, value in items: result.append(value.output(attrs, header)) return sep.join(result) __str__ = output def __repr__(self): l = [] items = sorted(self.items()) for key, value in items: l.append('%s=%s' % (key, repr(value.value))) return '<%s: %s>' % (self.__class__.__name__, _spacejoin(l)) def js_output(self, attrs=None): """Return a string suitable for JavaScript.""" result = [] items = sorted(self.items()) for key, value in items: result.append(value.js_output(attrs)) return _nulljoin(result) def load(self, rawdata): """Load cookies from a string (presumably HTTP_COOKIE) or from a dictionary. Loading cookies from a dictionary 'd' is equivalent to calling: map(Cookie.__setitem__, d.keys(), d.values()) """ if isinstance(rawdata, str): self.__parse_string(rawdata) else: # self.update() wouldn't call our custom __setitem__ for key, value in rawdata.items(): self[key] = value return def __parse_string(self, str, patt=_CookiePattern): i = 0 # Our starting point n = len(str) # Length of string M = None # current morsel while 0 <= i < n: # Start looking for a cookie match = patt.match(str, i) if not match: # No more cookies break key, value = match.group("key"), match.group("val") i = match.end(0) # Parse the key, value in case it's metainfo if key[0] == "$": # We ignore attributes which pertain to the cookie # mechanism as a whole. See RFC 2109. # (Does anyone care?) if M: M[key[1:]] = value elif key.lower() in Morsel._reserved: if M: if value is None: if key.lower() in Morsel._flags: M[key] = True else: M[key] = _unquote(value) elif value is not None: rval, cval = self.value_decode(value) self.__set(key, rval, cval) M = self[key] class SimpleCookie(BaseCookie): """ SimpleCookie supports strings as cookie values. When setting the value using the dictionary assignment notation, SimpleCookie calls the builtin str() to convert the value to a string. Values received from HTTP are kept as strings. """ def value_decode(self, val): return _unquote(val), val def value_encode(self, val): strval = str(val) return strval, _quote(strval) Back

Edit File : cookies.py | Size : 20.59 KB

####
# Copyright 2000 by Timothy O'Malley <timo@alum.mit.edu>
#
#                All Rights Reserved
#
# Permission to use, copy, modify, and distribute this software
# and its documentation for any purpose and without fee is hereby
# granted, provided that the above copyright notice appear in all
# copies and that both that copyright notice and this permission
# notice appear in supporting documentation, and that the name of
# Timothy O'Malley  not be used in advertising or publicity
# pertaining to distribution of the software without specific, written
# prior permission.
#
# Timothy O'Malley DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
# SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS, IN NO EVENT SHALL Timothy O'Malley BE LIABLE FOR
# ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
#
####
#
# Id: Cookie.py,v 2.29 2000/08/23 05:28:49 timo Exp
#   by Timothy O'Malley <timo@alum.mit.edu>
#
#  Cookie.py is a Python module for the handling of HTTP
#  cookies as a Python dictionary.  See RFC 2109 for more
#  information on cookies.
#
#  The original idea to treat Cookies as a dictionary came from
#  Dave Mitchell (davem@magnet.com) in 1995, when he released the
#  first version of nscookie.py.
#
####

r"""
Here's a sample session to show how to use this module.
At the moment, this is the only documentation.

The Basics
----------

Importing is easy...

>>> from http import cookies

Most of the time you start by creating a cookie.

>>> C = cookies.SimpleCookie()

Once you've created your Cookie, you can add values just as if it were
a dictionary.

>>> C = cookies.SimpleCookie()
   >>> C["fig"] = "newton"
   >>> C["sugar"] = "wafer"
   >>> C.output()
   'Set-Cookie: fig=newton\r\nSet-Cookie: sugar=wafer'

Notice that the printable representation of a Cookie is the
appropriate format for a Set-Cookie: header.  This is the
default behavior.  You can change the header and printed
attributes by using the .output() function

>>> C = cookies.SimpleCookie()
   >>> C["rocky"] = "road"
   >>> C["rocky"]["path"] = "/cookie"
   >>> print(C.output(header="Cookie:"))
   Cookie: rocky=road; Path=/cookie
   >>> print(C.output(attrs=[], header="Cookie:"))
   Cookie: rocky=road

The load() method of a Cookie extracts cookies from a string.  In a
CGI script, you would use this method to extract the cookies from the
HTTP_COOKIE environment variable.

>>> C = cookies.SimpleCookie()
   >>> C.load("chips=ahoy; vienna=finger")
   >>> C.output()
   'Set-Cookie: chips=ahoy\r\nSet-Cookie: vienna=finger'

The load() method is darn-tootin smart about identifying cookies
within a string.  Escaped quotation marks, nested semicolons, and other
such trickeries do not confuse it.

>>> C = cookies.SimpleCookie()
   >>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";')
   >>> print(C)
   Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=\012;"

Each element of the Cookie also supports all of the RFC 2109
Cookie attributes.  Here's an example which sets the Path
attribute.

>>> C = cookies.SimpleCookie()
   >>> C["oreo"] = "doublestuff"
   >>> C["oreo"]["path"] = "/"
   >>> print(C)
   Set-Cookie: oreo=doublestuff; Path=/

Each dictionary element has a 'value' attribute, which gives you
back the value associated with the key.

>>> C = cookies.SimpleCookie()
   >>> C["twix"] = "none for you"
   >>> C["twix"].value
   'none for you'

The SimpleCookie expects that all values should be standard strings.
Just to be sure, SimpleCookie invokes the str() builtin to convert
the value to a string, when the values are set dictionary-style.

>>> C = cookies.SimpleCookie()
   >>> C["number"] = 7
   >>> C["string"] = "seven"
   >>> C["number"].value
   '7'
   >>> C["string"].value
   'seven'
   >>> C.output()
   'Set-Cookie: number=7\r\nSet-Cookie: string=seven'

Finis.
"""

#
# Import our required modules
#
import re
import string

__all__ = ["CookieError", "BaseCookie", "SimpleCookie"]

_nulljoin = ''.join
_semispacejoin = '; '.join
_spacejoin = ' '.join

#
# Define an exception visible to External modules
#
class CookieError(Exception):
    pass

# These quoting routines conform to the RFC2109 specification, which in
# turn references the character definitions from RFC2068.  They provide
# a two-way quoting algorithm.  Any non-text character is translated
# into a 4 character sequence: a forward-slash followed by the
# three-digit octal equivalent of the character.  Any '\' or '"' is
# quoted with a preceeding '\' slash.
#
# These are taken from RFC2068 and RFC2109.
#       _LegalChars       is the list of chars which don't require "'s
#       _Translator       hash-table for fast quoting
#
_LegalChars       = string.ascii_letters + string.digits + "!#$%&'*+-.^_`|~:"
_Translator       = {
    '\000' : '\\000',  '\001' : '\\001',  '\002' : '\\002',
    '\003' : '\\003',  '\004' : '\\004',  '\005' : '\\005',
    '\006' : '\\006',  '\007' : '\\007',  '\010' : '\\010',
    '\011' : '\\011',  '\012' : '\\012',  '\013' : '\\013',
    '\014' : '\\014',  '\015' : '\\015',  '\016' : '\\016',
    '\017' : '\\017',  '\020' : '\\020',  '\021' : '\\021',
    '\022' : '\\022',  '\023' : '\\023',  '\024' : '\\024',
    '\025' : '\\025',  '\026' : '\\026',  '\027' : '\\027',
    '\030' : '\\030',  '\031' : '\\031',  '\032' : '\\032',
    '\033' : '\\033',  '\034' : '\\034',  '\035' : '\\035',
    '\036' : '\\036',  '\037' : '\\037',

# Because of the way browsers really handle cookies (as opposed
    # to what the RFC says) we also encode , and ;

',' : '\\054', ';' : '\\073',

'"' : '\\"',       '\\' : '\\\\',

'\177' : '\\177',  '\200' : '\\200',  '\201' : '\\201',
    '\202' : '\\202',  '\203' : '\\203',  '\204' : '\\204',
    '\205' : '\\205',  '\206' : '\\206',  '\207' : '\\207',
    '\210' : '\\210',  '\211' : '\\211',  '\212' : '\\212',
    '\213' : '\\213',  '\214' : '\\214',  '\215' : '\\215',
    '\216' : '\\216',  '\217' : '\\217',  '\220' : '\\220',
    '\221' : '\\221',  '\222' : '\\222',  '\223' : '\\223',
    '\224' : '\\224',  '\225' : '\\225',  '\226' : '\\226',
    '\227' : '\\227',  '\230' : '\\230',  '\231' : '\\231',
    '\232' : '\\232',  '\233' : '\\233',  '\234' : '\\234',
    '\235' : '\\235',  '\236' : '\\236',  '\237' : '\\237',
    '\240' : '\\240',  '\241' : '\\241',  '\242' : '\\242',
    '\243' : '\\243',  '\244' : '\\244',  '\245' : '\\245',
    '\246' : '\\246',  '\247' : '\\247',  '\250' : '\\250',
    '\251' : '\\251',  '\252' : '\\252',  '\253' : '\\253',
    '\254' : '\\254',  '\255' : '\\255',  '\256' : '\\256',
    '\257' : '\\257',  '\260' : '\\260',  '\261' : '\\261',
    '\262' : '\\262',  '\263' : '\\263',  '\264' : '\\264',
    '\265' : '\\265',  '\266' : '\\266',  '\267' : '\\267',
    '\270' : '\\270',  '\271' : '\\271',  '\272' : '\\272',
    '\273' : '\\273',  '\274' : '\\274',  '\275' : '\\275',
    '\276' : '\\276',  '\277' : '\\277',  '\300' : '\\300',
    '\301' : '\\301',  '\302' : '\\302',  '\303' : '\\303',
    '\304' : '\\304',  '\305' : '\\305',  '\306' : '\\306',
    '\307' : '\\307',  '\310' : '\\310',  '\311' : '\\311',
    '\312' : '\\312',  '\313' : '\\313',  '\314' : '\\314',
    '\315' : '\\315',  '\316' : '\\316',  '\317' : '\\317',
    '\320' : '\\320',  '\321' : '\\321',  '\322' : '\\322',
    '\323' : '\\323',  '\324' : '\\324',  '\325' : '\\325',
    '\326' : '\\326',  '\327' : '\\327',  '\330' : '\\330',
    '\331' : '\\331',  '\332' : '\\332',  '\333' : '\\333',
    '\334' : '\\334',  '\335' : '\\335',  '\336' : '\\336',
    '\337' : '\\337',  '\340' : '\\340',  '\341' : '\\341',
    '\342' : '\\342',  '\343' : '\\343',  '\344' : '\\344',
    '\345' : '\\345',  '\346' : '\\346',  '\347' : '\\347',
    '\350' : '\\350',  '\351' : '\\351',  '\352' : '\\352',
    '\353' : '\\353',  '\354' : '\\354',  '\355' : '\\355',
    '\356' : '\\356',  '\357' : '\\357',  '\360' : '\\360',
    '\361' : '\\361',  '\362' : '\\362',  '\363' : '\\363',
    '\364' : '\\364',  '\365' : '\\365',  '\366' : '\\366',
    '\367' : '\\367',  '\370' : '\\370',  '\371' : '\\371',
    '\372' : '\\372',  '\373' : '\\373',  '\374' : '\\374',
    '\375' : '\\375',  '\376' : '\\376',  '\377' : '\\377'
    }

def _quote(str, LegalChars=_LegalChars):
    r"""Quote a string for use in a cookie header.

If the string does not need to be double-quoted, then just return the
    string.  Otherwise, surround the string in doublequotes and quote
    (with a \) special characters.
    """
    if all(c in LegalChars for c in str):
        return str
    else:
        return '"' + _nulljoin(_Translator.get(s, s) for s in str) + '"'

_OctalPatt = re.compile(r"\\[0-3][0-7][0-7]")
_QuotePatt = re.compile(r"[\\].")

def _unquote(str):
    # If there aren't any doublequotes,
    # then there can't be any special characters.  See RFC 2109.
    if len(str) < 2:
        return str
    if str[0] != '"' or str[-1] != '"':
        return str

# We have to assume that we must decode this string.
    # Down to work.

# Remove the "s
    str = str[1:-1]

# Check for special sequences.  Examples:
    #    \012 --> \n
    #    \"   --> "
    #
    i = 0
    n = len(str)
    res = []
    while 0 <= i < n:
        o_match = _OctalPatt.search(str, i)
        q_match = _QuotePatt.search(str, i)
        if not o_match and not q_match:              # Neither matched
            res.append(str[i:])
            break
        # else:
        j = k = -1
        if o_match:
            j = o_match.start(0)
        if q_match:
            k = q_match.start(0)
        if q_match and (not o_match or k < j):     # QuotePatt matched
            res.append(str[i:k])
            res.append(str[k+1])
            i = k + 2
        else:                                      # OctalPatt matched
            res.append(str[i:j])
            res.append(chr(int(str[j+1:j+4], 8)))
            i = j + 4
    return _nulljoin(res)

# The _getdate() routine is used to set the expiration time in the cookie's HTTP
# header.  By default, _getdate() returns the current time in the appropriate
# "expires" format for a Set-Cookie header.  The one optional argument is an
# offset from now, in seconds.  For example, an offset of -3600 means "one hour
# ago".  The offset may be a floating point number.
#

_weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']

_monthname = [None,
              'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
              'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']

def _getdate(future=0, weekdayname=_weekdayname, monthname=_monthname):
    from time import gmtime, time
    now = time()
    year, month, day, hh, mm, ss, wd, y, z = gmtime(now + future)
    return "%s, %02d %3s %4d %02d:%02d:%02d GMT" % \
           (weekdayname[wd], day, monthname[month], year, hh, mm, ss)

class Morsel(dict):
    """A class to hold ONE (key, value) pair.

In a cookie, each such pair may have several attributes, so this class is
    used to keep the attributes associated with the appropriate key,value pair.
    This class also includes a coded_value attribute, which is used to hold
    the network representation of the value.  This is most useful when Python
    objects are pickled for network transit.
    """
    # RFC 2109 lists these attributes as reserved:
    #   path       comment         domain
    #   max-age    secure      version
    #
    # For historical reasons, these attributes are also reserved:
    #   expires
    #
    # This is an extension from Microsoft:
    #   httponly
    #
    # This dictionary provides a mapping from the lowercase
    # variant on the left to the appropriate traditional
    # formatting on the right.
    _reserved = {
        "expires"  : "expires",
        "path"     : "Path",
        "comment"  : "Comment",
        "domain"   : "Domain",
        "max-age"  : "Max-Age",
        "secure"   : "Secure",
        "httponly" : "HttpOnly",
        "version"  : "Version",
    }

_flags = {'secure', 'httponly'}

def __init__(self):
        # Set defaults
        self.key = self.value = self.coded_value = None

# Set default attributes
        for key in self._reserved:
            dict.__setitem__(self, key, "")

def __setitem__(self, K, V):
        K = K.lower()
        if not K in self._reserved:
            raise CookieError("Invalid Attribute %s" % K)
        dict.__setitem__(self, K, V)

def isReservedKey(self, K):
        return K.lower() in self._reserved

def set(self, key, val, coded_val, LegalChars=_LegalChars):
        # First we verify that the key isn't a reserved word
        # Second we make sure it only contains legal characters
        if key.lower() in self._reserved:
            raise CookieError("Attempt to set a reserved key: %s" % key)
        if any(c not in LegalChars for c in key):
            raise CookieError("Illegal key value: %s" % key)

# It's a good key, so save it.
        self.key = key
        self.value = val
        self.coded_value = coded_val

def output(self, attrs=None, header="Set-Cookie:"):
        return "%s %s" % (header, self.OutputString(attrs))

__str__ = output

def __repr__(self):
        return '<%s: %s=%s>' % (self.__class__.__name__,
                                self.key, repr(self.value))

def js_output(self, attrs=None):
        # Print javascript
        return """
        <script type="text/javascript">
        
        </script>
        """ % (self.OutputString(attrs).replace('"', r'\"'))

def OutputString(self, attrs=None):
        # Build up our result
        #
        result = []
        append = result.append

# First, the key=value pair
        append("%s=%s" % (self.key, self.coded_value))

# Now add any defined attributes
        if attrs is None:
            attrs = self._reserved
        items = sorted(self.items())
        for key, value in items:
            if value == "":
                continue
            if key not in attrs:
                continue
            if key == "expires" and isinstance(value, int):
                append("%s=%s" % (self._reserved[key], _getdate(value)))
            elif key == "max-age" and isinstance(value, int):
                append("%s=%d" % (self._reserved[key], value))
            elif key == "secure":
                append(str(self._reserved[key]))
            elif key == "httponly":
                append(str(self._reserved[key]))
            else:
                append("%s=%s" % (self._reserved[key], value))

# Return the result
        return _semispacejoin(result)

#
# Pattern for finding cookie
#
# This used to be strict parsing based on the RFC2109 and RFC2068
# specifications.  I have since discovered that MSIE 3.0x doesn't
# follow the character rules outlined in those specs.  As a
# result, the parsing rules here are less strict.
#

_LegalKeyChars  = r"\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\="
_LegalValueChars = _LegalKeyChars + '\[\]'
_CookiePattern = re.compile(r"""
    (?x)                           # This is a verbose pattern
    \s*                            # Optional whitespace at start of cookie
    (?P<key>                       # Start of group 'key'
    [""" + _LegalKeyChars + r"""]+?   # Any word of at least one letter
    )                              # End of group 'key'
    (                              # Optional group: there may not be a value.
    \s*=\s*                          # Equal Sign
    (?P<val>                         # Start of group 'val'
    "(?:[^\\"]|\\.)*"                  # Any doublequoted string
    |                                  # or
    \w{3},\s[\w\d\s-]{9,11}\s[\d:]{8}\sGMT  # Special case for "expires" attr
    |                                  # or
    [""" + _LegalValueChars + r"""]*      # Any word or empty string
    )                                # End of group 'val'
    )?                             # End of optional value group
    \s*                            # Any number of spaces.
    (\s+|;|$)                      # Ending either at space, semicolon, or EOS.
    """, re.ASCII)                 # May be removed if safe.

# At long last, here is the cookie class.  Using this class is almost just like
# using a dictionary.  See this module's docstring for example usage.
#
class BaseCookie(dict):
    """A container class for a set of Morsels."""

def value_decode(self, val):
        """real_value, coded_value = value_decode(STRING)
        Called prior to setting a cookie's value from the network
        representation.  The VALUE is the value read from HTTP
        header.
        Override this function to modify the behavior of cookies.
        """
        return val, val

def value_encode(self, val):
        """real_value, coded_value = value_encode(VALUE)
        Called prior to setting a cookie's value from the dictionary
        representation.  The VALUE is the value being assigned.
        Override this function to modify the behavior of cookies.
        """
        strval = str(val)
        return strval, strval

def __init__(self, input=None):
        if input:
            self.load(input)

def __set(self, key, real_value, coded_value):
        """Private method for setting a cookie's value"""
        M = self.get(key, Morsel())
        M.set(key, real_value, coded_value)
        dict.__setitem__(self, key, M)

def __setitem__(self, key, value):
        """Dictionary style assignment."""
        if isinstance(value, Morsel):
            # allow assignment of constructed Morsels (e.g. for pickling)
            dict.__setitem__(self, key, value)
        else:
            rval, cval = self.value_encode(value)
            self.__set(key, rval, cval)

def output(self, attrs=None, header="Set-Cookie:", sep="\015\012"):
        """Return a string suitable for HTTP."""
        result = []
        items = sorted(self.items())
        for key, value in items:
            result.append(value.output(attrs, header))
        return sep.join(result)

__str__ = output

def __repr__(self):
        l = []
        items = sorted(self.items())
        for key, value in items:
            l.append('%s=%s' % (key, repr(value.value)))
        return '<%s: %s>' % (self.__class__.__name__, _spacejoin(l))

def js_output(self, attrs=None):
        """Return a string suitable for JavaScript."""
        result = []
        items = sorted(self.items())
        for key, value in items:
            result.append(value.js_output(attrs))
        return _nulljoin(result)

def load(self, rawdata):
        """Load cookies from a string (presumably HTTP_COOKIE) or
        from a dictionary.  Loading cookies from a dictionary 'd'
        is equivalent to calling:
            map(Cookie.__setitem__, d.keys(), d.values())
        """
        if isinstance(rawdata, str):
            self.__parse_string(rawdata)
        else:
            # self.update() wouldn't call our custom __setitem__
            for key, value in rawdata.items():
                self[key] = value
        return

def __parse_string(self, str, patt=_CookiePattern):
        i = 0            # Our starting point
        n = len(str)     # Length of string
        M = None         # current morsel

while 0 <= i < n:
            # Start looking for a cookie
            match = patt.match(str, i)
            if not match:
                # No more cookies
                break

key, value = match.group("key"), match.group("val")
            i = match.end(0)

# Parse the key, value in case it's metainfo
            if key[0] == "$":
                # We ignore attributes which pertain to the cookie
                # mechanism as a whole.  See RFC 2109.
                # (Does anyone care?)
                if M:
                    M[key[1:]] = value
            elif key.lower() in Morsel._reserved:
                if M:
                    if value is None:
                        if key.lower() in Morsel._flags:
                            M[key] = True
                    else:
                        M[key] = _unquote(value)
            elif value is not None:
                rval, cval = self.value_decode(value)
                self.__set(key, rval, cval)
                M = self[key]

class SimpleCookie(BaseCookie):
    """
    SimpleCookie supports strings as cookie values.  When setting
    the value using the dictionary assignment notation, SimpleCookie
    calls the builtin str() to convert the value to a string.  Values
    received from HTTP are kept as strings.
    """
    def value_decode(self, val):
        return _unquote(val), val

def value_encode(self, val):
        strval = str(val)
        return strval, _quote(strval)

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