9091b56c69
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@3926 fd906abe-77d9-0310-91a1-e0d9ade77398
108 lines
3.8 KiB
Python
108 lines
3.8 KiB
Python
#
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# Copyright (c) 2010 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Resource adapter(s) for MS Office files.
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$Id$
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"""
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from lxml import etree
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from zipfile import ZipFile
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import shutil
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from zope.cachedescriptors.property import Lazy
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from zope import component
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from zope.component import adapts
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from zope.interface import implements
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from zope.traversing.api import getName, getParent
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from cybertools.storage.interfaces import IExternalStorage
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from loops.common import AdapterBase, adapted
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from loops.integrator.interfaces import IOfficeFile
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from loops.interfaces import IResource, IExternalFile
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from loops.resource import ExternalFileAdapter
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from loops.type import TypeInterfaceSourceList
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from loops.versioning.interfaces import IVersionable
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TypeInterfaceSourceList.typeInterfaces += (IOfficeFile,)
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class OfficeFile(ExternalFileAdapter):
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""" An external file that references a MS Office (2007/2010) file.
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It provides access to the document content and properties.
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"""
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implements(IOfficeFile)
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propertyMap = {u'Revision:': 'version'}
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propFileName = 'docProps/custom.xml'
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def setExternalAddress(self, addr):
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super(OfficeFile, self).setExternalAddress(addr)
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self.processDocument()
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externalAddress = property(ExternalFileAdapter.getExternalAddress,
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setExternalAddress)
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def processDocument(self):
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storage = component.getUtility(IExternalStorage, name=self.storageName)
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subDir = self.storageParams.get('subdirectory')
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fn = storage.getDir(self.externalAddress, subDir)
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# TODO: check if suitable file type (.docx, .xlsm)
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# open ZIP file, process properties, set version property in file
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zf = ZipFile(fn, 'r')
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#print '***', zf.namelist()
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propsXml = zf.read(self.propFileName)
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dom = etree.fromstring(propsXml)
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changed = False
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docVersion = None
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version = IVersionable(self.context).versionId
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strType = ('{http://schemas.openxmlformats.org/'
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'officeDocument/2006/docPropsVTypes}lpwstr')
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attributes = {}
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for p in dom:
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name = p.attrib.get('name')
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value = p[0].text
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#print '***', name, value, p[0].tag
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attr = self.propertyMap.get(name)
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if attr == 'version':
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docVersion = value
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if docVersion and docVersion != version:
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# update XML
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p[0] = etree.Element(strType)
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p[0].text = version
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changed = True
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elif attr is not None:
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attributes[attr] = value
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zf.close()
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if changed:
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newFn = fn + '.new'
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zf = ZipFile(fn, 'r')
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newZf = ZipFile(newFn, 'w')
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for info in zf.infolist():
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name = info.filename
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if name != self.propFileName:
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newZf.writestr(info, zf.read(name))
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newZf.writestr(self.propFileName, etree.tostring(dom))
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newZf.close()
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shutil.move(newFn, fn)
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self.update(attributes)
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def update(self, attributes):
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# to be implemented by subclass
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pass
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