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b992a0e102
requires them. Disable executable bits and shebang lines in test and benchmark files in order to prevent using a random system python, and in source files of modules which don't provide command line interface. Fixed shebang line to use python3 executable in the unittestgui script.
577 lines
20 KiB
Python
577 lines
20 KiB
Python
####
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# Copyright 2000 by Timothy O'Malley <timo@alum.mit.edu>
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#
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# All Rights Reserved
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#
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# Permission to use, copy, modify, and distribute this software
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# and its documentation for any purpose and without fee is hereby
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# granted, provided that the above copyright notice appear in all
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# copies and that both that copyright notice and this permission
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# notice appear in supporting documentation, and that the name of
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# Timothy O'Malley not be used in advertising or publicity
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# pertaining to distribution of the software without specific, written
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# prior permission.
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#
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# Timothy O'Malley DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
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# SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS, IN NO EVENT SHALL Timothy O'Malley BE LIABLE FOR
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# ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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# PERFORMANCE OF THIS SOFTWARE.
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#
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####
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#
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# Id: Cookie.py,v 2.29 2000/08/23 05:28:49 timo Exp
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# by Timothy O'Malley <timo@alum.mit.edu>
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#
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# Cookie.py is a Python module for the handling of HTTP
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# cookies as a Python dictionary. See RFC 2109 for more
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# information on cookies.
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#
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# The original idea to treat Cookies as a dictionary came from
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# Dave Mitchell (davem@magnet.com) in 1995, when he released the
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# first version of nscookie.py.
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#
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####
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r"""
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Here's a sample session to show how to use this module.
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At the moment, this is the only documentation.
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The Basics
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----------
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Importing is easy...
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>>> from http import cookies
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Most of the time you start by creating a cookie.
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>>> C = cookies.SimpleCookie()
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Once you've created your Cookie, you can add values just as if it were
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a dictionary.
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>>> C = cookies.SimpleCookie()
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>>> C["fig"] = "newton"
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>>> C["sugar"] = "wafer"
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>>> C.output()
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'Set-Cookie: fig=newton\r\nSet-Cookie: sugar=wafer'
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Notice that the printable representation of a Cookie is the
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appropriate format for a Set-Cookie: header. This is the
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default behavior. You can change the header and printed
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attributes by using the .output() function
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>>> C = cookies.SimpleCookie()
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>>> C["rocky"] = "road"
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>>> C["rocky"]["path"] = "/cookie"
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>>> print(C.output(header="Cookie:"))
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Cookie: rocky=road; Path=/cookie
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>>> print(C.output(attrs=[], header="Cookie:"))
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Cookie: rocky=road
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The load() method of a Cookie extracts cookies from a string. In a
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CGI script, you would use this method to extract the cookies from the
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HTTP_COOKIE environment variable.
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>>> C = cookies.SimpleCookie()
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>>> C.load("chips=ahoy; vienna=finger")
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>>> C.output()
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'Set-Cookie: chips=ahoy\r\nSet-Cookie: vienna=finger'
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The load() method is darn-tootin smart about identifying cookies
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within a string. Escaped quotation marks, nested semicolons, and other
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such trickeries do not confuse it.
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>>> C = cookies.SimpleCookie()
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>>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";')
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>>> print(C)
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Set-Cookie: keebler="E=everybody; L=\"Loves\"; fudge=\012;"
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Each element of the Cookie also supports all of the RFC 2109
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Cookie attributes. Here's an example which sets the Path
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attribute.
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>>> C = cookies.SimpleCookie()
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>>> C["oreo"] = "doublestuff"
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>>> C["oreo"]["path"] = "/"
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>>> print(C)
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Set-Cookie: oreo=doublestuff; Path=/
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Each dictionary element has a 'value' attribute, which gives you
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back the value associated with the key.
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>>> C = cookies.SimpleCookie()
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>>> C["twix"] = "none for you"
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>>> C["twix"].value
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'none for you'
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The SimpleCookie expects that all values should be standard strings.
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Just to be sure, SimpleCookie invokes the str() builtin to convert
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the value to a string, when the values are set dictionary-style.
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>>> C = cookies.SimpleCookie()
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>>> C["number"] = 7
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>>> C["string"] = "seven"
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>>> C["number"].value
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'7'
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>>> C["string"].value
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'seven'
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>>> C.output()
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'Set-Cookie: number=7\r\nSet-Cookie: string=seven'
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Finis.
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"""
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#
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# Import our required modules
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#
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import re
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import string
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__all__ = ["CookieError", "BaseCookie", "SimpleCookie"]
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_nulljoin = ''.join
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_semispacejoin = '; '.join
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_spacejoin = ' '.join
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#
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# Define an exception visible to External modules
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#
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class CookieError(Exception):
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pass
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# These quoting routines conform to the RFC2109 specification, which in
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# turn references the character definitions from RFC2068. They provide
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# a two-way quoting algorithm. Any non-text character is translated
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# into a 4 character sequence: a forward-slash followed by the
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# three-digit octal equivalent of the character. Any '\' or '"' is
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# quoted with a preceeding '\' slash.
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#
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# These are taken from RFC2068 and RFC2109.
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# _LegalChars is the list of chars which don't require "'s
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# _Translator hash-table for fast quoting
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#
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_LegalChars = string.ascii_letters + string.digits + "!#$%&'*+-.^_`|~:"
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_Translator = {
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'\000' : '\\000', '\001' : '\\001', '\002' : '\\002',
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'\003' : '\\003', '\004' : '\\004', '\005' : '\\005',
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'\006' : '\\006', '\007' : '\\007', '\010' : '\\010',
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'\011' : '\\011', '\012' : '\\012', '\013' : '\\013',
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'\014' : '\\014', '\015' : '\\015', '\016' : '\\016',
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'\017' : '\\017', '\020' : '\\020', '\021' : '\\021',
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'\022' : '\\022', '\023' : '\\023', '\024' : '\\024',
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'\025' : '\\025', '\026' : '\\026', '\027' : '\\027',
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'\030' : '\\030', '\031' : '\\031', '\032' : '\\032',
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'\033' : '\\033', '\034' : '\\034', '\035' : '\\035',
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'\036' : '\\036', '\037' : '\\037',
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# Because of the way browsers really handle cookies (as opposed
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# to what the RFC says) we also encode , and ;
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',' : '\\054', ';' : '\\073',
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'"' : '\\"', '\\' : '\\\\',
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'\177' : '\\177', '\200' : '\\200', '\201' : '\\201',
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'\202' : '\\202', '\203' : '\\203', '\204' : '\\204',
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'\205' : '\\205', '\206' : '\\206', '\207' : '\\207',
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'\210' : '\\210', '\211' : '\\211', '\212' : '\\212',
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'\213' : '\\213', '\214' : '\\214', '\215' : '\\215',
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'\216' : '\\216', '\217' : '\\217', '\220' : '\\220',
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'\221' : '\\221', '\222' : '\\222', '\223' : '\\223',
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'\224' : '\\224', '\225' : '\\225', '\226' : '\\226',
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'\227' : '\\227', '\230' : '\\230', '\231' : '\\231',
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'\232' : '\\232', '\233' : '\\233', '\234' : '\\234',
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'\235' : '\\235', '\236' : '\\236', '\237' : '\\237',
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'\240' : '\\240', '\241' : '\\241', '\242' : '\\242',
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'\243' : '\\243', '\244' : '\\244', '\245' : '\\245',
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'\246' : '\\246', '\247' : '\\247', '\250' : '\\250',
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'\251' : '\\251', '\252' : '\\252', '\253' : '\\253',
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'\254' : '\\254', '\255' : '\\255', '\256' : '\\256',
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'\257' : '\\257', '\260' : '\\260', '\261' : '\\261',
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'\262' : '\\262', '\263' : '\\263', '\264' : '\\264',
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'\265' : '\\265', '\266' : '\\266', '\267' : '\\267',
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'\270' : '\\270', '\271' : '\\271', '\272' : '\\272',
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'\273' : '\\273', '\274' : '\\274', '\275' : '\\275',
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'\276' : '\\276', '\277' : '\\277', '\300' : '\\300',
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'\301' : '\\301', '\302' : '\\302', '\303' : '\\303',
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'\304' : '\\304', '\305' : '\\305', '\306' : '\\306',
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'\307' : '\\307', '\310' : '\\310', '\311' : '\\311',
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'\312' : '\\312', '\313' : '\\313', '\314' : '\\314',
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'\315' : '\\315', '\316' : '\\316', '\317' : '\\317',
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'\320' : '\\320', '\321' : '\\321', '\322' : '\\322',
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'\323' : '\\323', '\324' : '\\324', '\325' : '\\325',
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'\326' : '\\326', '\327' : '\\327', '\330' : '\\330',
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'\331' : '\\331', '\332' : '\\332', '\333' : '\\333',
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'\334' : '\\334', '\335' : '\\335', '\336' : '\\336',
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'\337' : '\\337', '\340' : '\\340', '\341' : '\\341',
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'\342' : '\\342', '\343' : '\\343', '\344' : '\\344',
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'\345' : '\\345', '\346' : '\\346', '\347' : '\\347',
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'\350' : '\\350', '\351' : '\\351', '\352' : '\\352',
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'\353' : '\\353', '\354' : '\\354', '\355' : '\\355',
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'\356' : '\\356', '\357' : '\\357', '\360' : '\\360',
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'\361' : '\\361', '\362' : '\\362', '\363' : '\\363',
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'\364' : '\\364', '\365' : '\\365', '\366' : '\\366',
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'\367' : '\\367', '\370' : '\\370', '\371' : '\\371',
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'\372' : '\\372', '\373' : '\\373', '\374' : '\\374',
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'\375' : '\\375', '\376' : '\\376', '\377' : '\\377'
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}
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def _quote(str, LegalChars=_LegalChars):
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r"""Quote a string for use in a cookie header.
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If the string does not need to be double-quoted, then just return the
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string. Otherwise, surround the string in doublequotes and quote
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(with a \) special characters.
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"""
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if all(c in LegalChars for c in str):
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return str
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else:
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return '"' + _nulljoin(_Translator.get(s, s) for s in str) + '"'
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_OctalPatt = re.compile(r"\\[0-3][0-7][0-7]")
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_QuotePatt = re.compile(r"[\\].")
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def _unquote(str):
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# If there aren't any doublequotes,
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# then there can't be any special characters. See RFC 2109.
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if len(str) < 2:
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return str
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if str[0] != '"' or str[-1] != '"':
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return str
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# We have to assume that we must decode this string.
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# Down to work.
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# Remove the "s
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str = str[1:-1]
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# Check for special sequences. Examples:
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# \012 --> \n
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# \" --> "
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#
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i = 0
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n = len(str)
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res = []
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while 0 <= i < n:
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o_match = _OctalPatt.search(str, i)
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q_match = _QuotePatt.search(str, i)
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if not o_match and not q_match: # Neither matched
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res.append(str[i:])
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break
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# else:
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j = k = -1
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if o_match:
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j = o_match.start(0)
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if q_match:
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k = q_match.start(0)
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if q_match and (not o_match or k < j): # QuotePatt matched
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res.append(str[i:k])
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res.append(str[k+1])
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i = k + 2
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else: # OctalPatt matched
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res.append(str[i:j])
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res.append(chr(int(str[j+1:j+4], 8)))
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i = j + 4
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return _nulljoin(res)
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# The _getdate() routine is used to set the expiration time in the cookie's HTTP
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# header. By default, _getdate() returns the current time in the appropriate
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# "expires" format for a Set-Cookie header. The one optional argument is an
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# offset from now, in seconds. For example, an offset of -3600 means "one hour
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# ago". The offset may be a floating point number.
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#
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_weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
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_monthname = [None,
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'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
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'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
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def _getdate(future=0, weekdayname=_weekdayname, monthname=_monthname):
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from time import gmtime, time
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now = time()
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year, month, day, hh, mm, ss, wd, y, z = gmtime(now + future)
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return "%s, %02d %3s %4d %02d:%02d:%02d GMT" % \
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(weekdayname[wd], day, monthname[month], year, hh, mm, ss)
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class Morsel(dict):
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"""A class to hold ONE (key, value) pair.
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In a cookie, each such pair may have several attributes, so this class is
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used to keep the attributes associated with the appropriate key,value pair.
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This class also includes a coded_value attribute, which is used to hold
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the network representation of the value. This is most useful when Python
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objects are pickled for network transit.
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"""
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# RFC 2109 lists these attributes as reserved:
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# path comment domain
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# max-age secure version
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#
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# For historical reasons, these attributes are also reserved:
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# expires
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#
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# This is an extension from Microsoft:
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# httponly
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#
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# This dictionary provides a mapping from the lowercase
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# variant on the left to the appropriate traditional
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# formatting on the right.
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_reserved = {
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"expires" : "expires",
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"path" : "Path",
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"comment" : "Comment",
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"domain" : "Domain",
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"max-age" : "Max-Age",
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"secure" : "secure",
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"httponly" : "httponly",
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"version" : "Version",
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}
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_flags = {'secure', 'httponly'}
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def __init__(self):
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# Set defaults
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self.key = self.value = self.coded_value = None
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# Set default attributes
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for key in self._reserved:
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dict.__setitem__(self, key, "")
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def __setitem__(self, K, V):
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K = K.lower()
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if not K in self._reserved:
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raise CookieError("Invalid Attribute %s" % K)
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dict.__setitem__(self, K, V)
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def isReservedKey(self, K):
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return K.lower() in self._reserved
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def set(self, key, val, coded_val, LegalChars=_LegalChars):
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# First we verify that the key isn't a reserved word
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# Second we make sure it only contains legal characters
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if key.lower() in self._reserved:
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raise CookieError("Attempt to set a reserved key: %s" % key)
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if any(c not in LegalChars for c in key):
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raise CookieError("Illegal key value: %s" % key)
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# It's a good key, so save it.
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self.key = key
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self.value = val
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self.coded_value = coded_val
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def output(self, attrs=None, header="Set-Cookie:"):
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return "%s %s" % (header, self.OutputString(attrs))
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__str__ = output
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def __repr__(self):
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return '<%s: %s=%s>' % (self.__class__.__name__,
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self.key, repr(self.value))
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def js_output(self, attrs=None):
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# Print javascript
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return """
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<script type="text/javascript">
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<!-- begin hiding
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document.cookie = \"%s\";
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// end hiding -->
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</script>
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""" % (self.OutputString(attrs).replace('"', r'\"'))
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def OutputString(self, attrs=None):
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# Build up our result
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#
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result = []
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append = result.append
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# First, the key=value pair
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append("%s=%s" % (self.key, self.coded_value))
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# Now add any defined attributes
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if attrs is None:
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attrs = self._reserved
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items = sorted(self.items())
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for key, value in items:
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if value == "":
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continue
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if key not in attrs:
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continue
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if key == "expires" and isinstance(value, int):
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append("%s=%s" % (self._reserved[key], _getdate(value)))
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elif key == "max-age" and isinstance(value, int):
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append("%s=%d" % (self._reserved[key], value))
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elif key == "secure":
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append(str(self._reserved[key]))
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elif key == "httponly":
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append(str(self._reserved[key]))
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else:
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append("%s=%s" % (self._reserved[key], value))
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# Return the result
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return _semispacejoin(result)
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#
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# Pattern for finding cookie
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#
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# This used to be strict parsing based on the RFC2109 and RFC2068
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# specifications. I have since discovered that MSIE 3.0x doesn't
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# follow the character rules outlined in those specs. As a
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# result, the parsing rules here are less strict.
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#
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_LegalCharsPatt = r"[\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{\=]"
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_CookiePattern = re.compile(r"""
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(?x) # This is a verbose pattern
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(?P<key> # Start of group 'key'
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""" + _LegalCharsPatt + r"""+? # Any word of at least one letter
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) # End of group 'key'
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( # Optional group: there may not be a value.
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\s*=\s* # Equal Sign
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(?P<val> # Start of group 'val'
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"(?:[^\\"]|\\.)*" # Any doublequoted string
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| # or
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\w{3},\s[\w\d\s-]{9,11}\s[\d:]{8}\sGMT # Special case for "expires" attr
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| # or
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""" + _LegalCharsPatt + r"""* # Any word or empty string
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) # End of group 'val'
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)? # End of optional value group
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\s* # Any number of spaces.
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(\s+|;|$) # Ending either at space, semicolon, or EOS.
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""", re.ASCII) # May be removed if safe.
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# At long last, here is the cookie class. Using this class is almost just like
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# using a dictionary. See this module's docstring for example usage.
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#
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class BaseCookie(dict):
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"""A container class for a set of Morsels."""
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def value_decode(self, val):
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"""real_value, coded_value = value_decode(STRING)
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Called prior to setting a cookie's value from the network
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representation. The VALUE is the value read from HTTP
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header.
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Override this function to modify the behavior of cookies.
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"""
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return val, val
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def value_encode(self, val):
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"""real_value, coded_value = value_encode(VALUE)
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Called prior to setting a cookie's value from the dictionary
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representation. The VALUE is the value being assigned.
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Override this function to modify the behavior of cookies.
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"""
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strval = str(val)
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return strval, strval
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def __init__(self, input=None):
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if input:
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self.load(input)
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def __set(self, key, real_value, coded_value):
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"""Private method for setting a cookie's value"""
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M = self.get(key, Morsel())
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M.set(key, real_value, coded_value)
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dict.__setitem__(self, key, M)
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def __setitem__(self, key, value):
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"""Dictionary style assignment."""
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rval, cval = self.value_encode(value)
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self.__set(key, rval, cval)
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def output(self, attrs=None, header="Set-Cookie:", sep="\015\012"):
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"""Return a string suitable for HTTP."""
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result = []
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items = sorted(self.items())
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for key, value in items:
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result.append(value.output(attrs, header))
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return sep.join(result)
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__str__ = output
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def __repr__(self):
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l = []
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items = sorted(self.items())
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for key, value in items:
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l.append('%s=%s' % (key, repr(value.value)))
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return '<%s: %s>' % (self.__class__.__name__, _spacejoin(l))
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def js_output(self, attrs=None):
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"""Return a string suitable for JavaScript."""
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result = []
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items = sorted(self.items())
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for key, value in items:
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result.append(value.js_output(attrs))
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return _nulljoin(result)
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def load(self, rawdata):
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"""Load cookies from a string (presumably HTTP_COOKIE) or
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from a dictionary. Loading cookies from a dictionary 'd'
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is equivalent to calling:
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map(Cookie.__setitem__, d.keys(), d.values())
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"""
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if isinstance(rawdata, str):
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self.__parse_string(rawdata)
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else:
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# self.update() wouldn't call our custom __setitem__
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for key, value in rawdata.items():
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self[key] = value
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return
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def __parse_string(self, str, patt=_CookiePattern):
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i = 0 # Our starting point
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n = len(str) # Length of string
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M = None # current morsel
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while 0 <= i < n:
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# Start looking for a cookie
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match = patt.search(str, i)
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if not match:
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# No more cookies
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break
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key, value = match.group("key"), match.group("val")
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i = match.end(0)
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# Parse the key, value in case it's metainfo
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if key[0] == "$":
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# We ignore attributes which pertain to the cookie
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# mechanism as a whole. See RFC 2109.
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# (Does anyone care?)
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if M:
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M[key[1:]] = value
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elif key.lower() in Morsel._reserved:
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if M:
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if value is None:
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if key.lower() in Morsel._flags:
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M[key] = True
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else:
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M[key] = _unquote(value)
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elif value is not None:
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rval, cval = self.value_decode(value)
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self.__set(key, rval, cval)
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M = self[key]
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class SimpleCookie(BaseCookie):
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"""
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SimpleCookie supports strings as cookie values. When setting
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the value using the dictionary assignment notation, SimpleCookie
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calls the builtin str() to convert the value to a string. Values
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received from HTTP are kept as strings.
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"""
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def value_decode(self, val):
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return _unquote(val), val
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def value_encode(self, val):
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strval = str(val)
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return strval, _quote(strval)
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