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Added Tim O'Malley's Cookie.py module (master version at
http://www.timo-tasi.org/python/Cookie.py) This is revision 2.26 according to Tim's RCS history.
This commit is contained in:
Andrew M. Kuchling
parent
73f77b4495
commit
52ea872777
1 changed files with 718 additions and 0 deletions
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Lib/Cookie.py
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Lib/Cookie.py
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#!/usr/bin/env python
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#
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####
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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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# $Id$
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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 Mitchel (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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"""
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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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>>> import Cookie
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Most of the time you start by creating a cookie. Cookies come in
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three flavors, each with slighly different encoding semanitcs, but
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more on that later.
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>>> C = Cookie.SimpleCookie()
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>>> C = Cookie.SerialCookie()
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>>> C = Cookie.SmartCookie()
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[Note: Long-time users of Cookie.py will remember using
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Cookie.Cookie() to create an Cookie object. Although deprecated, it
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is still supported by the code. See the Backward Compatibility notes
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for more information.]
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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 = Cookie.SmartCookie()
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>>> C["fig"] = "newton"
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>>> C["sugar"] = "wafer"
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>>> C
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Set-Cookie: sugar=wafer;
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Set-Cookie: fig=newton;
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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 the .output() function
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>>> C = Cookie.SmartCookie()
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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 = Cookie.SmartCookie()
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>>> C.load("chips=ahoy; vienna=finger")
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>>> C
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Set-Cookie: vienna=finger;
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Set-Cookie: chips=ahoy;
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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 = Cookie.SmartCookie()
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>>> C.load('keebler="E=everybody; L=\\"Loves\\"; fudge=\\012;";')
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>>> 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 = Cookie.SmartCookie()
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>>> C["oreo"] = "doublestuff"
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>>> C["oreo"]["path"] = "/"
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>>> 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 = Cookie.SmartCookie()
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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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A Bit More Advanced
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-------------------
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As mentioned before, there are three different flavors of Cookie
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objects, each with different encoding/decoding semantics. This
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section briefly discusses the differences.
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SimpleCookie
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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 = Cookie.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
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Set-Cookie: number=7;
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Set-Cookie: string=seven;
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SerialCookie
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The SerialCookie expects that all values should be serialized using
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cPickle (or pickle, if cPickle isn't available). As a result of
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serializing, SerialCookie can save almost any Python object to a
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value, and recover the exact same object when the cookie has been
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returned. (SerialCookie can yield some strange-looking cookie
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values, however.)
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>>> C = Cookie.SerialCookie()
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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
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Set-Cookie: number="I7\012.";
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Set-Cookie: string="S'seven'\012p1\012.";
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Be warned, however, if SerialCookie cannot de-serialize a value (because
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it isn't a valid pickle'd object), IT WILL RAISE AN EXCEPTION.
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SmartCookie
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The SmartCookie combines aspects of each of the other two flavors.
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When setting a value in a dictionary-fashion, the SmartCookie will
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serialize (ala cPickle) the value *if and only if* it isn't a
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Python string. String objects are *not* serialized. Similarly,
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when the load() method parses out values, it attempts to de-serialize
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the value. If it fails, then it fallsback to treating the value
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as a string.
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>>> C = Cookie.SmartCookie()
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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
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Set-Cookie: number="I7\012.";
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Set-Cookie: string=seven;
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Backwards Compatibility
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-----------------------
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In order to keep compatibilty with earlier versions of Cookie.py,
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it is still possible to use Cookie.Cookie() to create a Cookie. In
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fact, this simply returns a SmartCookie.
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>>> C = Cookie.Cookie()
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>>> C.__class__
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<class Cookie.SmartCookie at 99f88>
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Finis.
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""" #"
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# ^
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# |----helps out font-lock
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#
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# Import our required modules
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#
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import string, sys
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from UserDict import UserDict
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try:
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from cPickle import dumps, loads
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except ImportError:
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from pickle import dumps, loads
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try:
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import re
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except ImportError:
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raise ImportError, "Cookie.py requires 're' from Python 1.5 or later"
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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.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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'"' : '\\"', '\\' : '\\\\',
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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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join=string.join, idmap=string._idmap, translate=string.translate):
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#
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# If the string does not need to be double-quoted,
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# then just return the string. Otherwise, surround
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# the string in doublequotes and precede quote (with a \)
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# special characters.
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#
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if "" == translate(str, idmap, LegalChars):
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return str
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else:
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return '"' + join( map(_Translator.get, str, str), "" ) + '"'
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# end _quote
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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, join=string.join, atoi=string.atoi):
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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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Omatch = _OctalPatt.search(str, i)
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Qmatch = _QuotePatt.search(str, i)
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if not Omatch and not Qmatch: # 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 Omatch: j = Omatch.start(0)
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||||||
|
if Qmatch: k = Qmatch.start(0)
|
||||||
|
if Qmatch and ( not Omatch 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( atoi(str[j+1:j+4], 8) ) )
|
||||||
|
i = j+4
|
||||||
|
return join(res, "")
|
||||||
|
# end _unquote
|
||||||
|
|
||||||
|
# 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)
|
||||||
|
|
||||||
|
|
||||||
|
#
|
||||||
|
# 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.
|
||||||
|
#
|
||||||
|
|
||||||
|
class Morsel(UserDict):
|
||||||
|
# RFC 2109 lists these attributes as reserved:
|
||||||
|
# path comment domain
|
||||||
|
# max-age secure version
|
||||||
|
#
|
||||||
|
# For historical reasons, these attributes are also reserved:
|
||||||
|
# expires
|
||||||
|
#
|
||||||
|
# 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",
|
||||||
|
"version" : "Version",
|
||||||
|
}
|
||||||
|
_reserved_keys = _reserved.keys()
|
||||||
|
|
||||||
|
def __init__(self):
|
||||||
|
# Set defaults
|
||||||
|
self.key = self.value = self.coded_value = None
|
||||||
|
UserDict.__init__(self)
|
||||||
|
|
||||||
|
# Set default attributes
|
||||||
|
for K in self._reserved_keys:
|
||||||
|
UserDict.__setitem__(self, K, "")
|
||||||
|
# end __init__
|
||||||
|
|
||||||
|
def __setitem__(self, K, V):
|
||||||
|
K = string.lower(K)
|
||||||
|
if not K in self._reserved_keys:
|
||||||
|
raise CookieError("Invalid Attribute %s" % K)
|
||||||
|
UserDict.__setitem__(self, K, V)
|
||||||
|
# end __setitem__
|
||||||
|
|
||||||
|
def isReservedKey(self, K):
|
||||||
|
return string.lower(K) in self._reserved_keys
|
||||||
|
# end isReservedKey
|
||||||
|
|
||||||
|
def set(self, key, val, coded_val,
|
||||||
|
LegalChars=_LegalChars,
|
||||||
|
idmap=string._idmap, translate=string.translate ):
|
||||||
|
# First we verify that the key isn't a reserved word
|
||||||
|
# Second we make sure it only contains legal characters
|
||||||
|
if string.lower(key) in self._reserved_keys:
|
||||||
|
raise CookieError("Attempt to set a reserved key: %s" % key)
|
||||||
|
if "" != translate(key, idmap, LegalChars):
|
||||||
|
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
|
||||||
|
# end set
|
||||||
|
|
||||||
|
def output(self, attrs=None, header = "Set-Cookie:"):
|
||||||
|
return "%s %s" % ( header, self.OutputString(attrs) )
|
||||||
|
|
||||||
|
__repr__ = output
|
||||||
|
|
||||||
|
def js_output(self, attrs=None):
|
||||||
|
# Print javascript
|
||||||
|
return """
|
||||||
|
<SCRIPT LANGUAGE="JavaScript">
|
||||||
|
<!-- begin hiding
|
||||||
|
document.cookie = \"%s\"
|
||||||
|
// end hiding -->
|
||||||
|
</script>
|
||||||
|
""" % ( self.OutputString(attrs), )
|
||||||
|
# end js_output()
|
||||||
|
|
||||||
|
def OutputString(self, attrs=None):
|
||||||
|
# Build up our result
|
||||||
|
#
|
||||||
|
result = []
|
||||||
|
RA = result.append
|
||||||
|
|
||||||
|
# First, the key=value pair
|
||||||
|
RA("%s=%s;" % (self.key, self.coded_value))
|
||||||
|
|
||||||
|
# Now add any defined attributes
|
||||||
|
if attrs == None:
|
||||||
|
attrs = self._reserved_keys
|
||||||
|
for K,V in self.items():
|
||||||
|
if not V: continue
|
||||||
|
if K not in attrs: continue
|
||||||
|
if K == "expires" and type(V) == type(1):
|
||||||
|
RA("%s=%s;" % (self._reserved[K], _getdate(V)))
|
||||||
|
elif K == "max-age" and type(V) == type(1):
|
||||||
|
RA("%s=%d;" % (self._reserved[K], V))
|
||||||
|
elif K == "secure":
|
||||||
|
RA("%s;" % self._reserved[K])
|
||||||
|
else:
|
||||||
|
RA("%s=%s;" % (self._reserved[K], V))
|
||||||
|
|
||||||
|
# Return the result
|
||||||
|
return string.join(result, " ")
|
||||||
|
# end OutputString
|
||||||
|
# end Morsel class
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#
|
||||||
|
# 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.
|
||||||
|
#
|
||||||
|
|
||||||
|
_LegalCharsPatt = r"[\w\d!#%&'~_`><@,:/\$\*\+\-\.\^\|\)\(\?\}\{]"
|
||||||
|
_CookiePattern = re.compile(
|
||||||
|
r"(?x)" # This is a Verbose pattern
|
||||||
|
r"(?P<key>" # Start of group 'key'
|
||||||
|
""+ _LegalCharsPatt +"+" # Any word of at least one letter
|
||||||
|
r")" # End of group 'key'
|
||||||
|
r"\s*=\s*" # Equal Sign
|
||||||
|
r"(?P<val>" # Start of group 'val'
|
||||||
|
r'"(?:[^\\"]|\\.)*"' # Any doublequoted string
|
||||||
|
r"|" # or
|
||||||
|
""+ _LegalCharsPatt +"*" # Any word or empty string
|
||||||
|
r")" # End of group 'val'
|
||||||
|
r"\s*;?" # Probably ending in a semi-colon
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
# 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(UserDict):
|
||||||
|
# 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
|
||||||
|
# end value_encode
|
||||||
|
|
||||||
|
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
|
||||||
|
# end value_encode
|
||||||
|
|
||||||
|
def __init__(self, input=None):
|
||||||
|
UserDict.__init__(self)
|
||||||
|
if input: self.load(input)
|
||||||
|
# end __init__
|
||||||
|
|
||||||
|
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)
|
||||||
|
UserDict.__setitem__(self, key, M)
|
||||||
|
# end __set
|
||||||
|
|
||||||
|
def __setitem__(self, key, value):
|
||||||
|
"""Dictionary style assignment."""
|
||||||
|
rval, cval = self.value_encode(value)
|
||||||
|
self.__set(key, rval, cval)
|
||||||
|
# end __setitem__
|
||||||
|
|
||||||
|
def output(self, attrs=None, header="Set-Cookie:", sep="\n"):
|
||||||
|
"""Return a string suitable for HTTP."""
|
||||||
|
result = []
|
||||||
|
for K,V in self.items():
|
||||||
|
result.append( V.output(attrs, header) )
|
||||||
|
return string.join(result, sep)
|
||||||
|
# end output
|
||||||
|
|
||||||
|
__repr__ = output
|
||||||
|
|
||||||
|
def js_output(self, attrs=None):
|
||||||
|
"""Return a string suitable for JavaScript."""
|
||||||
|
result = []
|
||||||
|
for K,V in self.items():
|
||||||
|
result.append( V.js_output(attrs) )
|
||||||
|
return string.join(result, "")
|
||||||
|
# end js_output
|
||||||
|
|
||||||
|
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 type(rawdata) == type(""):
|
||||||
|
self.__ParseString(rawdata)
|
||||||
|
else:
|
||||||
|
self.update(rawdata)
|
||||||
|
return
|
||||||
|
# end load()
|
||||||
|
|
||||||
|
def __ParseString(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.search(str, i)
|
||||||
|
if not match: break # No more cookies
|
||||||
|
|
||||||
|
K,V = match.group("key"), match.group("val")
|
||||||
|
i = match.end(0)
|
||||||
|
|
||||||
|
# Parse the key, value in case it's metainfo
|
||||||
|
if K[0] == "$":
|
||||||
|
# We ignore attributes which pertain to the cookie
|
||||||
|
# mechanism as a whole. See RFC 2109.
|
||||||
|
# (Does anyone care?)
|
||||||
|
if M:
|
||||||
|
M[ K[1:] ] = V
|
||||||
|
elif string.lower(K) in Morsel._reserved_keys:
|
||||||
|
if M:
|
||||||
|
M[ K ] = V
|
||||||
|
else:
|
||||||
|
rval, cval = self.value_decode(V)
|
||||||
|
self.__set(K, rval, cval)
|
||||||
|
M = self[K]
|
||||||
|
|
||||||
|
return
|
||||||
|
# end __ParseString
|
||||||
|
# end BaseCookie class
|
||||||
|
|
||||||
|
class SimpleCookie(BaseCookie):
|
||||||
|
"""SimpleCookie
|
||||||
|
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 )
|
||||||
|
# end SimpleCookie
|
||||||
|
|
||||||
|
class SerialCookie(BaseCookie):
|
||||||
|
"""SerialCookie
|
||||||
|
SerialCookie supports arbitrary objects as cookie values. All
|
||||||
|
values are serialized (using cPickle) before being sent to the
|
||||||
|
client. All incoming values are assumed to be valid Pickle
|
||||||
|
representations. IF AN INCOMING VALUE IS NOT IN A VALID PICKLE
|
||||||
|
FORMAT, THEN AN EXCEPTION WILL BE RAISED.
|
||||||
|
|
||||||
|
Note: Large cookie values add overhead because they must be
|
||||||
|
retransmitted on every HTTP transaction.
|
||||||
|
|
||||||
|
Note: HTTP has a 2k limit on the size of a cookie. This class
|
||||||
|
does not check for this limit, so be careful!!!
|
||||||
|
"""
|
||||||
|
def value_decode(self, val):
|
||||||
|
# This could raise an exception!
|
||||||
|
return loads( _unquote(val) ), val
|
||||||
|
def value_encode(self, val):
|
||||||
|
return val, _quote( dumps(val) )
|
||||||
|
# end SerialCookie
|
||||||
|
|
||||||
|
class SmartCookie(BaseCookie):
|
||||||
|
"""SmartCookie
|
||||||
|
SmartCookie supports arbitrary objects as cookie values. If the
|
||||||
|
object is a string, then it is quoted. If the object is not a
|
||||||
|
string, however, then SmartCookie will use cPickle to serialize
|
||||||
|
the object into a string representation.
|
||||||
|
|
||||||
|
Note: Large cookie values add overhead because they must be
|
||||||
|
retransmitted on every HTTP transaction.
|
||||||
|
|
||||||
|
Note: HTTP has a 2k limit on the size of a cookie. This class
|
||||||
|
does not check for this limit, so be careful!!!
|
||||||
|
"""
|
||||||
|
def value_decode(self, val):
|
||||||
|
strval = _unquote(val)
|
||||||
|
try:
|
||||||
|
return loads(strval), val
|
||||||
|
except:
|
||||||
|
return strval, val
|
||||||
|
def value_encode(self, val):
|
||||||
|
if type(val) == type(""):
|
||||||
|
return val, _quote(val)
|
||||||
|
else:
|
||||||
|
return val, _quote( dumps(val) )
|
||||||
|
# end SmartCookie
|
||||||
|
|
||||||
|
|
||||||
|
###########################################################
|
||||||
|
# Backwards Compatibility: Don't break any existing code!
|
||||||
|
|
||||||
|
# We provide Cookie() as an alias for SmartCookie()
|
||||||
|
Cookie = SmartCookie
|
||||||
|
|
||||||
|
#
|
||||||
|
###########################################################
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#
|
||||||
|
# should add a test routine?
|
||||||
|
#
|
||||||
Loading…
Add table
Add a link
Reference in a new issue