Moved to App

lib/python/App/Common.py

+##############################################################################
+# 
+# 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]
+
+from time import time, asctime, gmtime
+from string import split
+
+
+def rfc1123_date(t=None, time=time, asctime=asctime, gmtime=gmtime,
+                 split=split):
+    # Return an RFC 1123 format date string.
+    t=split(asctime(gmtime(t or time())))
+    return '%s, %s %s %s %s GMT' % (t[0],t[2],t[1],t[4],t[3])
+
+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'):
+        return 0
+    return 1
+

lib/python/App/ImageFile.py

+##############################################################################
+# 
+# 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.
+# 
+##############################################################################
+"""Image object that is stored in a file"""
+
+__version__='$Revision: 1.1 $'[11:-2]
+
+
+from Globals import package_home
+from Common import rfc1123_date
+from string import rfind, split
+from DateTime import DateTime
+from time import time
+from os import stat
+import Acquisition
+
+
+class ImageFile(Acquisition.Explicit):
+    """Image objects stored in external files."""
+
+    def __init__(self,path,_prefix=None):
+        if _prefix is None: _prefix=SOFTWARE_HOME
+        elif type(_prefix) is not type(''):
+            _prefix=package_home(_prefix)
+        path='%s/%s' % (_prefix, path)
+        self.path=path
+        self.content_type='image/%s' % path[rfind(path,'.')+1:]
+        self.__name__=path[rfind(path,'/')+1:]
+        # Determine a reasonable last-modification time 
+        # to support aggressive image caching.
+        self.lmt=float(stat(path)[8]) or time()
+        self.lmh=rfc1123_date(self.lmt)
+
+    def _init_headers(self, request, response):
+        # attempt aggressive caching!
+        ms=request.get_header('If-Modified-Since', None)
+        if ms is not None:
+            # Netscape inexplicably adds a length component
+            # to the IMS header. Waaaa....
+            ms=split(ms, ';')[0]
+            mst=DateTime(ms).timeTime()
+            if mst >= self.lmt:
+                response.setStatus(304)
+                return response
+        response.setHeader('Content-Type', self.content_type)
+        response.setHeader('Last-Modified', self.lmh)
+        response.setHeader('Expires', rfc1123_date(time()+86400.0))
+        
+    def index_html(self, REQUEST, RESPONSE):
+        """Default document"""
+        self._init_headers(REQUEST, RESPONSE)
+        f=open(self.path,'rb')
+        data=f.read()
+        f.close()
+        return data
+
+    HEAD__roles__=None
+    def HEAD(self, REQUEST, RESPONSE):
+        """ """
+        self._init_headers(self, REQUEST, RESPONSE)
+        return ''
+
+    def __len__(self):
+        # This is bogus and needed because of the way Python tests truth.
+        return 1 
+
+    def __str__(self):
+        return '<IMG SRC="%s" ALT="%s">' % (self.__name__, self.title_or_id()) 
+