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2013-05-24 v0.25 PL: - getproperties: option to not convert some timestamps

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- OleMetaData: total_edit_time is now a number of seconds,
                       not a timestamp
                     - getproperties: added support for VT_BOOL, VT_INT, V_UINT
                     - getproperties: filter out null chars from strings
                     - getproperties: raise non-fatal defects instead of
                       exceptions when properties cannot be parsed properly
This commit is contained in:
decalage 2013-05-25 00:28:36 +02:00 committed by Martin Panter
parent 90f0b6796e
commit 8e826441b2
1 changed files with 132 additions and 68 deletions
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200
PIL/OleFileIO.py
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@ -6,7 +6,7 @@ OleFileIO_PL:
Microsoft Compound Document File Format), such as Microsoft Office Microsoft Compound Document File Format), such as Microsoft Office
documents, Image Composer and FlashPix files, Outlook messages, ... documents, Image Composer and FlashPix files, Outlook messages, ...
version 0.24 2013-05-07 Philippe Lagadec - http://www.decalage.info version 0.25 2013-05-24 Philippe Lagadec - http://www.decalage.info
Project website: http://www.decalage.info/python/olefileio Project website: http://www.decalage.info/python/olefileio
@ -24,8 +24,8 @@ WARNING: THIS IS (STILL) WORK IN PROGRESS.
""" """
__author__ = "Philippe Lagadec, Fredrik Lundh (Secret Labs AB)" __author__ = "Philippe Lagadec, Fredrik Lundh (Secret Labs AB)"
__date__ = "2013-05-07" __date__ = "2013-05-24"
__version__ = '0.24' __version__ = '0.25'
#--- LICENSE ------------------------------------------------------------------ #--- LICENSE ------------------------------------------------------------------
@ -116,10 +116,19 @@ __version__ = '0.24'
# - new class OleMetadata to parse standard properties # - new class OleMetadata to parse standard properties
# - added get_metadata method # - added get_metadata method
# 2013-05-07 v0.24 PL: - a few improvements in OleMetadata # 2013-05-07 v0.24 PL: - a few improvements in OleMetadata
# 2013-05-24 v0.25 PL: - getproperties: option to not convert some timestamps
# - OleMetaData: total_edit_time is now a number of seconds,
# not a timestamp
# - getproperties: added support for VT_BOOL, VT_INT, V_UINT
# - getproperties: filter out null chars from strings
# - getproperties: raise non-fatal defects instead of
# exceptions when properties cannot be parsed properly
#----------------------------------------------------------------------------- #-----------------------------------------------------------------------------
# TODO (for version 1.0): # TODO (for version 1.0):
# + _raise_defect: store all defects that are not raised as exceptions, and
# display them in main for information.
# + add path attrib to _OleDirEntry, set it once and for all in init or # + add path attrib to _OleDirEntry, set it once and for all in init or
# append_kids (then listdir/_list can be simplified) # append_kids (then listdir/_list can be simplified)
# - TESTS with Linux, MacOSX, Python 1.5.2, various files, PIL, ... # - TESTS with Linux, MacOSX, Python 1.5.2, various files, PIL, ...
@ -138,6 +147,8 @@ __version__ = '0.24'
# - improve docstrings to show more sample uses # - improve docstrings to show more sample uses
# - see also original notes and FIXME below # - see also original notes and FIXME below
# - remove all obsolete FIXMEs # - remove all obsolete FIXMEs
# - OleMetadata: fix version attrib according to
# http://msdn.microsoft.com/en-us/library/dd945671%28v=office.12%29.aspx
# IDEAS: # IDEAS:
# - allow _raise_defect to raise different exceptions, not only IOError # - allow _raise_defect to raise different exceptions, not only IOError
@ -548,8 +559,10 @@ class OleMetadata:
setattr(self, attrib, None) setattr(self, attrib, None)
if olefile.exists("\x05SummaryInformation"): if olefile.exists("\x05SummaryInformation"):
# get properties from the stream: # get properties from the stream:
# (converting timestamps to python datetime, except total_edit_time,
# which is property #10)
props = olefile.getproperties("\x05SummaryInformation", props = olefile.getproperties("\x05SummaryInformation",
convert_time=True) convert_time=True, no_conversion=[10])
# store them into this object's attributes: # store them into this object's attributes:
for i in range(len(self.SUMMARY_ATTRIBS)): for i in range(len(self.SUMMARY_ATTRIBS)):
# ids for standards properties start at 0x01, until 0x13 # ids for standards properties start at 0x01, until 0x13
@ -572,11 +585,11 @@ class OleMetadata:
print 'Properties from SummaryInformation stream:' print 'Properties from SummaryInformation stream:'
for prop in self.SUMMARY_ATTRIBS: for prop in self.SUMMARY_ATTRIBS:
value = getattr(self, prop) value = getattr(self, prop)
print '- %s: %s' % (prop, value) print '- %s: %s' % (prop, repr(value))
print 'Properties from DocumentSummaryInformation stream:' print 'Properties from DocumentSummaryInformation stream:'
for prop in self.DOCSUM_ATTRIBS: for prop in self.DOCSUM_ATTRIBS:
value = getattr(self, prop) value = getattr(self, prop)
print '- %s: %s' % (prop, value) print '- %s: %s' % (prop, repr(value))
#--- _OleStream --------------------------------------------------------------- #--- _OleStream ---------------------------------------------------------------
@ -1663,89 +1676,140 @@ class OleFileIO:
return self.root.name return self.root.name
def getproperties(self, filename, convert_time=False): def getproperties(self, filename, convert_time=False, no_conversion=None):
""" """
Return properties described in substream. Return properties described in substream.
filename: path of stream in storage tree (see openstream for syntax) filename: path of stream in storage tree (see openstream for syntax)
convert_time: bool, if True timestamps will be converted to Python datetime convert_time: bool, if True timestamps will be converted to Python datetime
no_conversion: None or list of int, timestamps not to be converted
(for example total editing time is not a real timestamp)
return: a dictionary of values indexed by id (integer) return: a dictionary of values indexed by id (integer)
""" """
# make sure no_conversion is a list, just to simplify code below:
if no_conversion == None:
no_conversion = []
fp = self.openstream(filename) fp = self.openstream(filename)
data = {} data = {}
# header try:
s = fp.read(28) # header
clsid = _clsid(s[8:24]) s = fp.read(28)
clsid = _clsid(s[8:24])
# format id # format id
s = fp.read(20) s = fp.read(20)
fmtid = _clsid(s[:16]) fmtid = _clsid(s[:16])
fp.seek(i32(s, 16)) fp.seek(i32(s, 16))
# get section # get section
s = "****" + fp.read(i32(fp.read(4))-4) s = "****" + fp.read(i32(fp.read(4))-4)
except:
# catch exception while parsing property header, and only raise
# a DEFECT_INCORRECT then return an empty dict, because this is not
# a fatal error when parsing the whole file
exctype, excvalue = sys.exc_info()[:2]
self._raise_defect(DEFECT_INCORRECT, excvalue)
return data
for i in range(i32(s, 4)): for i in range(i32(s, 4)):
try:
id = i32(s, 8+i*8)
offset = i32(s, 12+i*8)
type = i32(s, offset)
id = i32(s, 8+i*8) debug ('property id=%d: type=%d offset=%X' % (id, type, offset))
offset = i32(s, 12+i*8)
type = i32(s, offset)
debug ('property id=%d: type=%d offset=%X' % (id, type, offset)) # test for common types first (should perhaps use
# a dictionary instead?)
# test for common types first (should perhaps use if type == VT_I2: # 16-bit signed integer
# a dictionary instead?) value = i16(s, offset+4)
if value >= 32768:
if type == VT_I2: value = value - 65536
value = i16(s, offset+4) elif type == VT_UI2: # 2-byte unsigned integer
if value >= 32768: value = i16(s, offset+4)
value = value - 65536 elif type in (VT_I4, VT_INT, VT_ERROR):
elif type == VT_UI2: # VT_I4: 32-bit signed integer
value = i16(s, offset+4) # VT_ERROR: HRESULT, similar to 32-bit signed integer,
elif type in (VT_I4, VT_ERROR): # see http://msdn.microsoft.com/en-us/library/cc230330.aspx
value = i32(s, offset+4) value = i32(s, offset+4)
elif type == VT_UI4: elif type in (VT_UI4, VT_UINT): # 4-byte unsigned integer
value = i32(s, offset+4) # FIXME value = i32(s, offset+4) # FIXME
elif type in (VT_BSTR, VT_LPSTR): elif type in (VT_BSTR, VT_LPSTR):
count = i32(s, offset+4) # CodePageString, see http://msdn.microsoft.com/en-us/library/dd942354.aspx
value = s[offset+8:offset+8+count-1] # size is a 32 bits integer, including the null terminator, and
elif type == VT_BLOB: # possibly trailing or embedded null chars
count = i32(s, offset+4) #TODO: if codepage is unicode, the string should be converted as such
value = s[offset+8:offset+8+count] count = i32(s, offset+4)
elif type == VT_LPWSTR: value = s[offset+8:offset+8+count-1]
count = i32(s, offset+4) # remove all null chars:
value = _unicode(s[offset+8:offset+8+count*2]) value = value.replace('\x00', '')
elif type == VT_FILETIME: elif type == VT_BLOB:
value = long(i32(s, offset+4)) + (long(i32(s, offset+8))<<32) # binary large object (BLOB)
# FILETIME is a 64-bit int: "number of 100ns periods # see http://msdn.microsoft.com/en-us/library/dd942282.aspx
# since Jan 1,1601". count = i32(s, offset+4)
if convert_time: value = s[offset+8:offset+8+count]
# convert FILETIME to Python datetime.datetime elif type == VT_LPWSTR:
# inspired from http://code.activestate.com/recipes/511425-filetime-to-datetime/ # UnicodeString
_FILETIME_null_date = datetime.datetime(1601, 1, 1, 0, 0, 0) # see http://msdn.microsoft.com/en-us/library/dd942313.aspx
value = _FILETIME_null_date + datetime.timedelta(microseconds=value/10) # "the string should NOT contain embedded or additional trailing
# null characters."
count = i32(s, offset+4)
value = _unicode(s[offset+8:offset+8+count*2])
elif type == VT_FILETIME:
value = long(i32(s, offset+4)) + (long(i32(s, offset+8))<<32)
# FILETIME is a 64-bit int: "number of 100ns periods
# since Jan 1,1601".
if convert_time and id not in no_conversion:
debug('Converting property #%d to python datetime, value=%d=%fs'
%(id, value, float(value)/10000000L))
# convert FILETIME to Python datetime.datetime
# inspired from http://code.activestate.com/recipes/511425-filetime-to-datetime/
_FILETIME_null_date = datetime.datetime(1601, 1, 1, 0, 0, 0)
debug('timedelta days=%d' % (value/(10*1000000*3600*24)))
value = _FILETIME_null_date + datetime.timedelta(microseconds=value/10)
else:
# legacy code kept for backward compatibility: returns a
# number of seconds since Jan 1,1601
value = value / 10000000L # seconds
elif type == VT_UI1: # 1-byte unsigned integer
value = ord(s[offset+4])
elif type == VT_CLSID:
value = _clsid(s[offset+4:offset+20])
elif type == VT_CF:
# PropertyIdentifier or ClipboardData??
# see http://msdn.microsoft.com/en-us/library/dd941945.aspx
count = i32(s, offset+4)
value = s[offset+8:offset+8+count]
elif type == VT_BOOL:
# VARIANT_BOOL, 16 bits bool, 0x0000=Fals, 0xFFFF=True
# see http://msdn.microsoft.com/en-us/library/cc237864.aspx
value = bool(i16(s, offset+4))
else: else:
# legacy code kept for backward compatibility: returns a value = None # everything else yields "None"
# number of seconds since Jan 1,1601 debug ('property id=%d: type=%d not implemented in parser yet' % (id, type))
value = value / 10000000L # seconds
elif type == VT_UI1:
value = ord(s[offset+4])
elif type == VT_CLSID:
value = _clsid(s[offset+4:offset+20])
elif type == VT_CF:
count = i32(s, offset+4)
value = s[offset+8:offset+8+count]
else:
value = None # everything else yields "None"
# FIXME: add support for VT_VECTOR # missing: VT_EMPTY, VT_NULL, VT_R4, VT_R8, VT_CY, VT_DATE,
# VT_DECIMAL, VT_I1, VT_I8, VT_UI8,
# see http://msdn.microsoft.com/en-us/library/dd942033.aspx
#print "%08x" % id, repr(value), # FIXME: add support for VT_VECTOR
#print "(%s)" % VT[i32(s, offset) & 0xFFF] # VT_VECTOR is a 32 uint giving the number of items, followed by
# the items in sequence. The VT_VECTOR value is combined with the
# type of items, e.g. VT_VECTOR|VT_BSTR
# see http://msdn.microsoft.com/en-us/library/dd942011.aspx
data[id] = value #print "%08x" % id, repr(value),
#print "(%s)" % VT[i32(s, offset) & 0xFFF]
data[id] = value
except:
# catch exception while parsing each property, and only raise
# a DEFECT_INCORRECT, because parsing can go on
exctype, excvalue = sys.exc_info()[:2]
self._raise_defect(DEFECT_INCORRECT, excvalue)
return data return data
@ -1795,7 +1859,7 @@ Options:
check_streams = True check_streams = True
continue continue
ole = OleFileIO(filename, raise_defects=DEFECT_INCORRECT) ole = OleFileIO(filename)#, raise_defects=DEFECT_INCORRECT)
print "-" * 68 print "-" * 68
print filename print filename
print "-" * 68 print "-" * 68