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PclZip 2.8.2 - readme.txt
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License GNU/LGPL - August 2009
// Vincent Blavet -
vincent@phpconcept.net
// http://www.phpconcept.net
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$Id: readme.txt,v 1.60 2009/09/30 20:35:21 vblavet Exp $
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0
- Sommaire
============
1 - Introduction
2 - What's new
3 -
Corrected bugs
4 - Known bugs or limitations
5 - License
6 -
Warning
7 - Documentation
8 - Author
9 - Contribute
1 -
Introduction
================
PclZip is a library that allow you to
manage a Zip archive.
Full documentation about PclZip can be found here
: http://www.phpconcept.net/pclzip
2 - What's new
==============
Version 2.8.2 :
- PCLZIP_CB_PRE_EXTRACT and PCLZIP_CB_POST_EXTRACT are
now supported with
extraction as a string
(PCLZIP_OPT_EXTRACT_AS_STRING). The string
can also be modified in
the post-extract call back.
**Bugs correction :
-
PCLZIP_OPT_REMOVE_ALL_PATH was not working correctly
- Remove use
of eval() and do direct call to callback functions
- Correct support of
64bits systems (Thanks to WordPress team)
Version 2.8.1 :
- Move
option PCLZIP_OPT_BY_EREG to PCLZIP_OPT_BY_PREG because ereg() is
deprecated in PHP 5.3. When using option PCLZIP_OPT_BY_EREG, PclZip will
automatically replace it by PCLZIP_OPT_BY_PREG.
Version 2.8 :
-
Improve extraction of zip archive for large files by using temporary files
This feature is working like the one defined in r2.7.
Options
are renamed : PCLZIP_OPT_TEMP_FILE_ON, PCLZIP_OPT_TEMP_FILE_OFF,
PCLZIP_OPT_TEMP_FILE_THRESHOLD
- Add a ratio constant
PCLZIP_TEMPORARY_FILE_RATIO to configure the auto
sense of temporary
file use.
- Bug correction : Reduce filepath in returned file list to
remove ennoying
'.//' preambule in file path.
Version 2.7 :
-
Improve creation of zip archive for large files :
PclZip will now
autosense the configured memory and use temporary files
when large
file is suspected.
This feature can also ne triggered by manual
options in create() and add()
methods. 'PCLZIP_OPT_ADD_TEMP_FILE_ON'
force the use of temporary files,
'PCLZIP_OPT_ADD_TEMP_FILE_OFF'
disable the autosense technic,
'PCLZIP_OPT_ADD_TEMP_FILE_THRESHOLD'
allow for configuration of a size
threshold to use temporary files.
Using "temporary files" rather than "memory" might
take more time, but
might give the ability to zip very large files :
Tested on my win laptop with a 88Mo file :
Zip
"in-memory" : 18sec (max_execution_time=30, memory_limit=180Mo)
Zip "tmporary-files" : 23sec (max_execution_time=30,
memory_limit=30Mo)
- Replace use of mktime() by time() to limit the
E_STRICT error messages.
- Bug correction : When adding files with full
windows path (drive letter)
PclZip is now working. Before, if the
drive letter is not the default
path, PclZip was not able to add the
file.
Version 2.6 :
- Code optimisation
- New attributes
PCLZIP_ATT_FILE_COMMENT gives the ability to
add a comment for a
specific file. (Don't really know if this is usefull)
- New attribute
PCLZIP_ATT_FILE_CONTENT gives the ability to add a string
as a
file.
- New attribute PCLZIP_ATT_FILE_MTIME modify the timestamp
associated with
a file.
- Correct a bug. Files archived with a
timestamp with 0h0m0s were extracted
with current time
- Add CRC
value in the informations returned back for each file after an
action.
- Add missing closedir() statement.
- When adding a folder,
and removing the path of this folder, files were
incorrectly added
with a '/' at the beginning. Which means files are
related to root
in unix systems. Corrected.
- Add conditional if before constant
definition. This will allow users
to redefine constants without
changing the file, and then improve
upgrade of pclzip code for new
versions.
Version 2.5 :
- Introduce the ability to add file/folder
with individual properties (file descriptor).
This gives for example
the ability to change the filename of a zipped file.
. Able to add
files individually
. Able to change full name
. Able to change
short name
. Compatible with global options
- New attributes :
PCLZIP_ATT_FILE_NAME, PCLZIP_ATT_FILE_NEW_SHORT_NAME,
PCLZIP_ATT_FILE_NEW_FULL_NAME
- New error code :
PCLZIP_ERR_INVALID_ATTRIBUTE_VALUE
- Add a security control feature.
PclZip can extract any file in any folder
of a system. People may use
this to upload a zip file and try to override
a system file. The
PCLZIP_OPT_EXTRACT_DIR_RESTRICTION will give the
ability to forgive
any directory transversal behavior.
- New
PCLZIP_OPT_EXTRACT_DIR_RESTRICTION : check extraction path
- New error
code : PCLZIP_ERR_DIRECTORY_RESTRICTION
- Modification in
PclZipUtilPathInclusion() : dir and path beginning with ./ will be prepend
by current path (getcwd())
Version 2.4 :
- Code improvment :
try to speed up the code by removing unusefull call to pack()
- Correct
bug in delete() : delete() should be called with no argument. This was not
the case in 2.3. This is corrected in 2.4.
- Correct a bug in
path_inclusion function. When the path has several '../../', the
result was bad.
- Add a check for magic_quotes_runtime configuration.
If enabled, PclZip will
disable it while working and det it back to
its original value.
This resolve a lots of bad formated archive
errors.
- Bug correction : PclZip now correctly unzip file in some
specific situation,
when compressed content has same size as
uncompressed content.
- Bug correction : When selecting option
'PCLZIP_OPT_REMOVE_ALL_PATH',
directories are not any more created.
- Code improvment : correct unclosed opendir(), better handling of . and
.. in
loops.
Version 2.3 :
- Correct a bug with PHP5 :
affecting the value 0xFE49FFE0 to a variable does not
give the same
result in PHP4 and PHP5 ....
Version 2.2 :
- Try development of
PCLZIP_OPT_CRYPT .....
However this becomes to a stop. To
crypt/decrypt I need to multiply 2 long integers,
the result (greater
than a long) is not supported by PHP. Even the use of bcmath
functions does not help. I did not find yet a solution ...;
- Add
missing '/' at end of directory entries
- Check is a file is encrypted
or not. Returns status 'unsupported_encryption' and/or
error code
PCLZIP_ERR_UNSUPPORTED_ENCRYPTION.
- Corrected : Bad "version need
to extract" field in local file header
- Add private method
privCheckFileHeaders() in order to check local and central
file
headers. PclZip is now supporting purpose bit flag bit 3. Purpose bit flag
bit 3 gives
the ability to have a local file header without size,
compressed size and crc filled.
- Add a generic status 'error' for file
status
- Add control of compression type. PclZip only support deflate
compression method.
Before v2.2, PclZip does not check the
compression method used in an archive while
extracting. With v2.2
PclZip returns a new error status for a file using an unsupported
compression method. New status is "unsupported_compression". New
error code is
PCLZIP_ERR_UNSUPPORTED_COMPRESSION.
- Add optional
attribute PCLZIP_OPT_STOP_ON_ERROR. This will stop the extract of files
when errors like 'a folder with same name exists' or 'a newer file
exists' or
'a write protected file' exists, rather than set a status
for the concerning file
and resume the extract of the zip.
- Add
optional attribute PCLZIP_OPT_REPLACE_NEWER. This will force, during an
extract' the
replacement of the file, even if a newer version of the
file exists.
Note that today if a file with the same name already
exists but is older it will be
replaced by the extracted one.
-
Improve PclZipUtilOption()
- Support of zip archive with trailing
bytes. Before 2.2, PclZip checks that the central
directory structure
is the last data in the archive. Crypt encryption/decryption of
zip
archive put trailing 0 bytes after decryption. PclZip is now supporting
this.
Version 2.1 :
- Add the ability to abort the extraction by
using a user callback function.
The user can now return the value '2'
in its callback which indicates to stop the
extraction. For a pre
call-back extract is stopped before the extration of the current
file. For a post call back, the extraction is stopped after.
- Add the
ability to extract a file (or several files) directly in the standard
output.
This is done by the new parameter
PCLZIP_OPT_EXTRACT_IN_OUTPUT with method extract().
- Add support for
parameters PCLZIP_OPT_COMMENT, PCLZIP_OPT_ADD_COMMENT,
PCLZIP_OPT_PREPEND_COMMENT. This will create, replace, add, or prepend
comments
in the zip archive.
- When merging two archives, the
comments are not any more lost, but merged, with a
blank space
separator.
- Corrected bug : Files are not deleted when all files are
asked to be deleted.
- Corrected bug : Folders with name '0' made
PclZip to abort the create or add feature.
Version 2.0 :
*****
Warning : Some new features may break the backward compatibility for your
scripts.
Please carefully read the readme file.
-
Add the ability to delete by Index, name and regular expression. This
feature is
performed by the method delete(), which uses the optional
parameters
PCLZIP_OPT_BY_INDEX, PCLZIP_OPT_BY_NAME,
PCLZIP_OPT_BY_EREG or PCLZIP_OPT_BY_PREG.
- Add the ability to extract
by regular expression. To extract by regexp you must use the method
extract(), with the option PCLZIP_OPT_BY_EREG or PCLZIP_OPT_BY_PREG
(depending if you want to use ereg() or preg_match() syntax) followed by
the
regular expression pattern.
- Add the ability to extract by
index, directly with the extract() method. This is a
code improvment
of the extractByIndex() method.
- Add the ability to extract by name.
To extract by name you must use the method
extract(), with the option
PCLZIP_OPT_BY_NAME followed by the filename to
extract or an array of
filenames to extract. To extract all a folder, use the folder
name
rather than the filename with a '/' at the end.
- Add the ability to
add files without compression. This is done with a new attribute
which is PCLZIP_OPT_NO_COMPRESSION.
- Add the attribute
PCLZIP_OPT_EXTRACT_AS_STRING, which allow to extract a file directly
in a string without using any file (or temporary file).
- Add constant
PCLZIP_SEPARATOR for static configuration of filename separators in a
single string.
The default separator is now a comma (,) and not any
more a blank space.
THIS BREAK THE BACKWARD COMPATIBILITY : Please
check if this may have an impact with
your script.
- Improve
algorythm performance by removing the use of temporary files when adding or
extracting files in an archive.
- Add (correct) detection of
empty filename zipping. This can occurs when the removed
path is the
same
as a zipped dir. The dir is not zipped (['status'] = filtered),
only its content.
- Add better support for windows paths (thanks for
help from manus@manusfreedom.com).
- Corrected bug : When the archive
file already exists with size=0, the add() method
fails. Corrected in
2.0.
- Remove the use of OS_WINDOWS constant. Use php_uname() function
rather.
- Control the order of index ranges in extract by index
feature.
- Change the internal management of folders (better handling
of internal flag).
Version 1.3 :
- Removing the double include
check. This is now done by include_once() and require_once()
PHP
directives.
- Changing the error handling mecanism : Remove the use of
an external error library.
The former PclError...() functions are
replaced by internal equivalent methods.
By changing the environment
variable PCLZIP_ERROR_EXTERNAL you can still use the former library.
Introducing the use of constants for error codes rather than integer
values. This will help
in futur improvment.
Introduction of
error handling functions like errorCode(), errorName() and errorInfo().
- Remove the deprecated use of calling function with arguments passed by
reference.
- Add the calling of extract(), extractByIndex(), create()
and add() functions
with variable options rather than fixed
arguments.
- Add the ability to remove all the file path while
extracting or adding,
without any need to specify the path to
remove.
This is available for extract(), extractByIndex(), create()
and add() functionS by using
the new variable options parameters :
- PCLZIP_OPT_REMOVE_ALL_PATH : by indicating this option while calling
the fct.
- Ability to change the mode of a file after the extraction
(chmod()).
This is available for extract() and extractByIndex()
functionS by using
the new variable options parameters.
-
PCLZIP_OPT_SET_CHMOD : by setting the value of this option.
- Ability
to definition call-back options. These call-back will be called during the
adding,
or the extracting of file (extract(), extractByIndex(),
create() and add() functions) :
- PCLZIP_CB_PRE_EXTRACT : will be
called before each extraction of a file. The user
can trigerred the
change the filename of the extracted file. The user can triggered the
skip of the extraction. This is adding a 'skipped' status in the file
list result value.
- PCLZIP_CB_POST_EXTRACT : will be called after
each extraction of a file.
Nothing can be triggered from that
point.
- PCLZIP_CB_PRE_ADD : will be called before each add of a
file. The user
can trigerred the change the stored filename of the
added file. The user can triggered the
skip of the add. This is
adding a 'skipped' status in the file list result value.
-
PCLZIP_CB_POST_ADD : will be called after each add of a file.
Nothing can be triggered from that point.
- Two status are added in the
file list returned as function result : skipped & filename_too_long
'skipped' is used when a call-back function ask for skipping the file.
'filename_too_long' is used while adding a file with a too long filename
to archive (the file is
not added)
- Adding the function
PclZipUtilPathInclusion(), that check the inclusion of a path into
a
directory.
- Add a check of the presence of the archive file before
some actions (like list, ...)
- Add the initialisation of field
"index" in header array. This means that by
default index
will be -1 when not explicitly set by the methods.
Version 1.2 :
-
Adding a duplicate function.
- Adding a merge function. The merge
function is a "quick merge" function,
it just append the
content of an archive at the end of the first one. There
is no check
for duplicate files or more recent files.
- Improve the search of the
central directory end.
Version 1.1.2 :
- Changing the license of
PclZip. PclZip is now released under the GNU / LGPL license
(see
License section).
- Adding the optional support of a static temporary
directory. You will need to configure
the constant
PCLZIP_TEMPORARY_DIR if you want to use this feature.
- Improving the
rename() function. In some cases rename() does not work (different
Filesystems), so it will be replaced by a copy() + unlink() functions.
Version 1.1.1 :
- Maintenance release, no new feature.
Version 1.1
:
- New method Add() : adding files in the archive
- New method
ExtractByIndex() : partial extract of the archive, files are identified by
their index in the archive
- New method DeleteByIndex() : delete
some files/folder entries from the archive,
files are identified by
their index in the archive.
- Adding a test of the zlib extension
presence. If not present abort the script.
Version 1.0.1 :
- No new
feature
3 - Corrected bugs
==================
Corrected in Version 2.0
:
- Corrected : During an extraction, if a call-back fucntion is used
and try to skip
a file, all the extraction process is
stopped.
Corrected in Version 1.3 :
- Corrected : Support of static
synopsis for method extract() is broken.
- Corrected : invalid size of
archive content field (0xFF) should be (0xFFFF).
- Corrected : When an
extract is done with a remove_path parameter, the entry for
the
directory with exactly the same path is not skipped/filtered.
-
Corrected : extractByIndex() and deleteByIndex() were not managing index in
the
right way. For example indexes '1,3-5,11' will only extract files
1 and 11. This
is due to a sort of the index resulting table that
puts 11 before 3-5 (sort on
string and not interger). The sort is
temporarilly removed, this means that
you must provide a sorted list
of index ranges.
Corrected in Version 1.2 :
- Nothing.
Corrected
in Version 1.1.2 :
- Corrected : Winzip is unable to delete or add new
files in a PclZip created archives.
Corrected in Version 1.1.1 :
-
Corrected : When archived file is not compressed (0% compression), the
extract method fails.
Corrected in Version 1.1 :
- Corrected :
Adding a complete tree of folder may result in a bad archive
creation.
Corrected in Version 1.0.1 :
- Corrected : Error while
compressing files greater than PCLZIP_READ_BLOCK_SIZE (default=1024).
4 -
Known bugs or limitations
=============================
Please publish
bugs reports in SourceForge :
http://sourceforge.net/tracker/?group_id=40254&atid=427564
In
Version 2.x :
- PclZip does only support file uncompressed or
compressed with deflate (compression method 8)
- PclZip does not
support password protected zip archive
- Some concern were seen when
changing mtime of a file while archiving.
Seems to be linked to
Daylight Saving Time (PclTest_changing_mtime).
In Version 1.2 :
-
merge() methods does not check for duplicate files or last date of
modifications.
In Version 1.1 :
- Limitation : Using 'extract'
fields in the file header in the zip archive is not supported.
- WinZip
is unable to delete a single file in a PclZip created archive. It is also
unable to
add a file in a PclZip created archive. (Corrected in
v.1.2)
In Version 1.0.1 :
- Adding a complete tree of folder may
result in a bad archive
creation. (Corrected in V.1.1).
- Path
given to methods must be in the unix format (/) and not the Windows format
(\).
Workaround : Use only / directory separators.
- PclZip is
using temporary files that are sometime the name of the file with a .tmp or
.gz
added suffix. Files with these names may already exist and may be
overwritten.
Workaround : none.
- PclZip does not check if the
zlib extension is present. If it is absent, the zip
file is not
created and the lib abort without warning.
Workaround : enable the
zlib extension on the php install
In Version 1.0 :
- Error while
compressing files greater than PCLZIP_READ_BLOCK_SIZE (default=1024).
(Corrected in v.1.0.1)
- Limitation : Multi-disk zip archive are not
supported.
5 - License
===========
Since version 1.1.2, PclZip Library
is released under GNU/LGPL license.
This library is free, so you can use
it at no cost.
HOWEVER, if you release a script, an application, a
library or any kind of
code using PclZip library (or a part of it), YOU
MUST :
- Indicate in the documentation (or a readme file), that your
work
uses PclZip Library, and make a reference to the author and the
web site
http://www.phpconcept.net
- Gives the ability to the final
user to update the PclZip libary.
I will also appreciate that you send
me a mail (vincent@phpconcept.net), just to
be aware that someone is
using PclZip.
For more information about GNU/LGPL license :
http://www.gnu.org
6 - Warning
=================
This library and the
associated files are non commercial, non professional work.
It should not
have unexpected results. However if any damage is caused by this software
the author can not be responsible.
The use of this software is at the
risk of the user.
7 - Documentation
=================
PclZip User Manuel
is available in English on PhpConcept :
http://www.phpconcept.net/pclzip/man/en/index.php
A Russian translation
was done by Feskov Kuzma :
http://php.russofile.ru/ru/authors/unsort/zip/
8 - Author
==========
This software was written by Vincent Blavet (vincent@phpconcept.net) on its
leasure time.
9 - Contribute
==============
If you want to contribute to
the development of PclZip, please contact vincent@phpconcept.net.
If you
can help in financing PhpConcept hosting service, please go to
http://www.phpconcept.net/soutien.php