Unable to view the contents of a zipped file using Zipfldr.dll

[Dennis Chia]

I think there might be a bug with the Zipfldr.dll. Most of
the time, for most of the zipped files, I am able to view
the contents of the zipped files as compressed folders.
But there is this particular zipped file that I am unable
to view the contents but when I use Winzip 8.1 SR-1 (5266)
to open the file, I am able to view the contents of that
particular zipped file.

Therefore either there is a bug with the Zipfldr.dll or
that particular zipped file was compressed with a
irregular compression algorithm that is acceptable to
Winzip 8.1 SR-1 (5266) but not to Zipfldr.dll.

The following is the test results from Winzip 8.1 SR-1
(5266) on the file:

Testing ...
Current Location part 1 offset 1772
Archive: E:\Drivers\deeper_closer.zip 1794 bytes 2
files
End central directory record PK0506 (4+18)
==========================================
current location of end-of-central-dir record: 1772
(0x000006ec) bytes
expected location of end-of-central-dir record: 1772
(0x000006ec) bytes
based on the size of the central directory of
126 and its relative offset of 1646 bytes
part number of this part (00): part 1
part number of start of central directory (00): part 1
number of entries in central dir in this part: 2
total number of entries in central dir: 2
size of central dir: 126
(0x0000007e) bytes
relative offset of central dir: 1646
(0x0000066e) bytes
zipfile comment length: 0
Current Location part 1 offset 1646
Central directory entry PK0102 (4+42): #1
=====================================
part number in which file begins (00): part 1
relative offset of local header: 0
(0x00000000) bytes
version made by operating system (00): MS-
DOS, OS/2, NT FAT
version made by zip software (20): 2.0
operat. system version needed to extract (00): MS-
DOS, OS/2, NT FAT
unzip software version needed to extract (20): 2.0
general purpose bit flag (0x0000) (bit 15..0):
0000.0000 0000.0000
file security status (bit 0): not
encrypted
extended local header (bit 3): no
compression method (08):
deflated
compression sub-type (deflation): normal
file last modified on (0x00002d5f 0x0000b595): 2002-
Oct-31 22:44:42
32-bit CRC value:
0x63aba944
compressed size: 1225
bytes
uncompressed size: 27306
bytes
length of filename: 17
characters
length of extra field: 0 bytes
length of file comment: 0
characters
internal file attributes: 0x0000
apparent file type: binary
external file attributes:
0x81b60020
non-MSDOS external file attributes:
0x81b600
MS-DOS file attributes (0x20): arc
Current Location part 1 offset 1692
filename:deeper,closer.mid
Current Location part 1 offset 1709
Central directory entry PK0102 (4+42): #2
=====================================
part number in which file begins (00): part 1
relative offset of local header: 1272
(0x000004f8) bytes
version made by operating system (00): MS-
DOS, OS/2, NT FAT
version made by zip software (20): 2.0
operat. system version needed to extract (00): MS-
DOS, OS/2, NT FAT
unzip software version needed to extract (20): 2.0
general purpose bit flag (0x0000) (bit 15..0):
0000.0000 0000.0000
file security status (bit 0): not
encrypted
extended local header (bit 3): no
compression method (08):
deflated
compression sub-type (deflation): normal
file last modified on (0x00002ef8 0x000084f5): 2003-
Jul-24 16:39:42
32-bit CRC value:
0x93958afd
compressed size: 327
bytes
uncompressed size: 687
bytes
length of filename: 17
characters
length of extra field: 0 bytes
length of file comment: 0
characters
internal file attributes: 0x0001
apparent file type: text
external file attributes:
0x81b60020
non-MSDOS external file attributes:
0x81b600
MS-DOS file attributes (0x20): arc
Current Location part 1 offset 1755
filenameeeper,Closer.txt
Current Location part 1 offset 0
Local directory entry PK0304 (4+26): #1
-----------------------------------
operat. system version needed to extract (00): MS-
DOS, OS/2, NT FAT
unzip software version needed to extract (20): 2.0
general purpose bit flag (0x0000) (bit 15..0):
0000.0000 0000.0000
file security status (bit 0): not
encrypted
extended local header (bit 3): no
compression method (08):
deflated
compression sub-type (deflation): normal
file last modified on (0x00002d5f 0x0000b595): 2002-
Oct-31 22:44:42
32-bit CRC value:
0x63aba944
compressed size: 1225
bytes
uncompressed size: 27306
bytes
length of filename: 17
characters
length of extra field: 0 bytes
Current Location part 1 offset 30
filename:deeper,closer.mid
Current Location part 1 offset 47
testing: deeper,closer.mid OK
Current Location part 1 offset 1272
Local directory entry PK0304 (4+26): #2
-----------------------------------
operat. system version needed to extract (00): MS-
DOS, OS/2, NT FAT
unzip software version needed to extract (20): 2.0
general purpose bit flag (0x0000) (bit 15..0):
0000.0000 0000.0000
file security status (bit 0): not
encrypted
extended local header (bit 3): no
compression method (08):
deflated
compression sub-type (deflation): normal
file last modified on (0x00002ef8 0x000084f5): 2003-
Jul-24 16:39:42
32-bit CRC value:
0x93958afd
compressed size: 327
bytes
uncompressed size: 687
bytes
length of filename: 17
characters
length of extra field: 0 bytes
Current Location part 1 offset 1302
filenameeeper,Closer.txt
Current Location part 1 offset 1319
testing: Deeper,Closer.txt OK
No errors detected in compressed data of
E:\Drivers\deeper_closer.zip.

 

[Kelly]

Hi Dennis,

Great info and you could be very well right. ) Try the tool on line 90,
is one of my favorites. http://www.kellys-korner-xp.com/xp_tweaks.htm

 

[Sharon F]

I think there might be a bug with the Zipfldr.dll.

Hotfix 329048 Causes a Zipped File Not to Be Shown If the Name Contains a
Comma
http://support.microsoft.com/default.aspx?scid=kb;en-us;813942&Product=winxp