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##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
"""Commonly used utility functions."""
__version__='$Revision: 1.1 $'[11:-2]
import sys, os, time
from string import rfind
# These are needed because the various date formats below must
# be in english per the RFCs. That means we can't use strftime,
# which is affected by different locale settings.
weekday_abbr = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
weekday_full = ['Monday', 'Tuesday', 'Wednesday', 'Thursday',
'Friday', 'Saturday', 'Sunday']
monthname = [None, 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
def iso8601_date(ts=None):
# Return an ISO 8601 formatted date string, required
# for certain DAV properties.
# '2000-11-10T16:21:09-08:00
if ts is None: ts=time.time()
return time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime(ts))
def rfc850_date(ts=None):
# Return an HTTP-date formatted date string.
# 'Friday, 10-Nov-00 16:21:09 GMT'
if ts is None: ts=time.time()
year, month, day, hh, mm, ss, wd, y, z = time.gmtime(ts)
return "%s, %02d-%3s-%2s %02d:%02d:%02d GMT" % (
weekday_full[wd],
day, monthname[month],
str(year)[2:],
hh, mm, ss)
def rfc1123_date(ts=None):
# Return an RFC 1123 format date string, required for
# use in HTTP Date headers per the HTTP 1.1 spec.
# 'Fri, 10 Nov 2000 16:21:09 GMT'
if ts is None: ts=time.time()
year, month, day, hh, mm, ss, wd, y, z = time.gmtime(ts)
return "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (weekday_abbr[wd],
day, monthname[month],
year,
hh, mm, ss)
def absattr(attr, c=callable):
# Return the absolute value of an attribute,
# calling the attr if it is callable.
if c(attr):
return attr()
return attr
def aq_base(ob, hasattr=hasattr):
# Return the aq_base of an object.
if hasattr(ob, 'aq_base'):
return ob.aq_base
return ob
def is_acquired(ob, hasattr=hasattr, aq_base=aq_base, absattr=absattr):
# Return true if this object is not a direct
# subobject of its aq_parent object.
if not hasattr(ob, 'aq_parent'):
return 0
if hasattr(aq_base(ob.aq_parent), absattr(ob.id)):
return 0
if hasattr(aq_base(ob), 'isTopLevelPrincipiaApplicationObject') and \
ob.isTopLevelPrincipiaApplicationObject:
return 0
return 1
def package_home(globals_dict):
__name__=globals_dict['__name__']
m=sys.modules[__name__]
if hasattr(m,'__path__'):
r=m.__path__[0]
elif "." in __name__:
r=sys.modules[__name__[:rfind(__name__,'.')]].__path__[0]
else:
r=__name__
return os.path.join(os.getcwd(), r)
def attrget(o,name,default):
if hasattr(o,name): return getattr(o,name)
return default
def Dictionary(**kw): return kw # Sorry Guido
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