NAME¶
IO::Compress::Zip - Write zip files/buffers
SYNOPSIS¶
use IO::Compress::Zip qw(zip $ZipError) ;
my $status = zip $input => $output [,OPTS]
or die "zip failed: $ZipError\n";
my $z = new IO::Compress::Zip $output [,OPTS]
or die "zip failed: $ZipError\n";
$z->print($string);
$z->printf($format, $string);
$z->write($string);
$z->syswrite($string [, $length, $offset]);
$z->flush();
$z->tell();
$z->eof();
$z->seek($position, $whence);
$z->binmode();
$z->fileno();
$z->opened();
$z->autoflush();
$z->input_line_number();
$z->newStream( [OPTS] );
$z->deflateParams();
$z->close() ;
$ZipError ;
# IO::File mode
print $z $string;
printf $z $format, $string;
tell $z
eof $z
seek $z, $position, $whence
binmode $z
fileno $z
close $z ;
DESCRIPTION¶
This module provides a Perl interface that allows writing zip compressed data to
files or buffer.
The primary purpose of this module is to provide streaming write access to zip
files and buffers. It is not a general-purpose file archiver. If that is what
you want, check out "Archive::Zip".
At present three compression methods are supported by IO::Compress::Zip, namely
Store (no compression at all), Deflate, Bzip2 and LZMA.
Note that to create Bzip2 content, the module "IO::Compress::Bzip2"
must be installed.
Note that to create LZMA content, the module "IO::Compress::Lzma" must
be installed.
For reading zip files/buffers, see the companion module IO::Uncompress::Unzip.
Functional Interface¶
A top-level function, "zip", is provided to carry out
"one-shot" compression between buffers and/or files. For finer
control over the compression process, see the "OO Interface"
section.
use IO::Compress::Zip qw(zip $ZipError) ;
zip $input => $output [,OPTS]
or die "zip failed: $ZipError\n";
The functional interface needs Perl5.005 or better.
"zip" expects at least two parameters, $input and $output.
The $input parameter
The parameter, $input, is used to define the source of the uncompressed data.
It can take one of the following forms:
- A filename
- If the $input parameter is a simple scalar, it is assumed
to be a filename. This file will be opened for reading and the input data
will be read from it.
- A filehandle
- If the $input parameter is a filehandle, the input data
will be read from it. The string '-' can be used as an alias for standard
input.
- A scalar reference
- If $input is a scalar reference, the input data will be
read from $$input.
- An array reference
- If $input is an array reference, each element in the array
must be a filename.
The input data will be read from each file in turn.
The complete array will be walked to ensure that it only contains valid
filenames before any data is compressed.
- An Input FileGlob string
- If $input is a string that is delimited by the characters
"<" and ">" "zip" will assume that it
is an input fileglob string. The input is the list of files that
match the fileglob.
See File::GlobMapper for more details.
If the $input parameter is any other type, "undef" will be returned.
In addition, if $input is a simple filename, the default values for the
"Name", "Time", "TextFlag", "ExtAttr",
"exUnixN" and "exTime" options will be sourced from that
file.
If you do not want to use these defaults they can be overridden by explicitly
setting the "Name", "Time", "TextFlag",
"ExtAttr", "exUnixN" and "exTime" options or by
setting the "Minimal" parameter.
The $output parameter
The parameter $output is used to control the destination of the compressed data.
This parameter can take one of these forms.
- A filename
- If the $output parameter is a simple scalar, it is assumed
to be a filename. This file will be opened for writing and the compressed
data will be written to it.
- A filehandle
- If the $output parameter is a filehandle, the compressed
data will be written to it. The string '-' can be used as an alias for
standard output.
- A scalar reference
- If $output is a scalar reference, the compressed data will
be stored in $$output.
- An Array Reference
- If $output is an array reference, the compressed data will
be pushed onto the array.
- An Output FileGlob
- If $output is a string that is delimited by the characters
"<" and ">" "zip" will assume that it
is an output fileglob string. The output is the list of files that
match the fileglob.
When $output is an fileglob string, $input must also be a fileglob string.
Anything else is an error.
See File::GlobMapper for more details.
If the $output parameter is any other type, "undef" will be returned.
Notes¶
When $input maps to multiple files/buffers and $output is a single file/buffer
the input files/buffers will each be stored in $output as a distinct entry.
Optional Parameters¶
Unless specified below, the optional parameters for "zip",
"OPTS", are the same as those used with the OO interface defined in
the "Constructor Options" section below.
- "AutoClose => 0|1"
- This option applies to any input or output data streams to
"zip" that are filehandles.
If "AutoClose" is specified, and the value is true, it will result
in all input and/or output filehandles being closed once "zip"
has completed.
This parameter defaults to 0.
- "BinModeIn => 0|1"
- When reading from a file or filehandle, set
"binmode" before reading.
Defaults to 0.
- "Append => 0|1"
- The behaviour of this option is dependent on the type of
output data stream.
- •
- A Buffer
If "Append" is enabled, all compressed data will be append to the
end of the output buffer. Otherwise the output buffer will be cleared
before any compressed data is written to it.
- •
- A Filename
If "Append" is enabled, the file will be opened in append mode.
Otherwise the contents of the file, if any, will be truncated before any
compressed data is written to it.
- •
- A Filehandle
If "Append" is enabled, the filehandle will be positioned to the
end of the file via a call to "seek" before any compressed data
is written to it. Otherwise the file pointer will not be moved.
When "Append" is specified, and set to true, it will
append all
compressed data to the output data stream.
So when the output is a filehandle it will carry out a seek to the eof before
writing any compressed data. If the output is a filename, it will be opened
for appending. If the output is a buffer, all compressed data will be appended
to the existing buffer.
Conversely when "Append" is not specified, or it is present and is set
to false, it will operate as follows.
When the output is a filename, it will truncate the contents of the file before
writing any compressed data. If the output is a filehandle its position will
not be changed. If the output is a buffer, it will be wiped before any
compressed data is output.
Defaults to 0.
Examples¶
To read the contents of the file "file1.txt" and write the compressed
data to the file "file1.txt.zip".
use strict ;
use warnings ;
use IO::Compress::Zip qw(zip $ZipError) ;
my $input = "file1.txt";
zip $input => "$input.zip"
or die "zip failed: $ZipError\n";
To read from an existing Perl filehandle, $input, and write the compressed data
to a buffer, $buffer.
use strict ;
use warnings ;
use IO::Compress::Zip qw(zip $ZipError) ;
use IO::File ;
my $input = new IO::File "<file1.txt"
or die "Cannot open 'file1.txt': $!\n" ;
my $buffer ;
zip $input => \$buffer
or die "zip failed: $ZipError\n";
To create a zip file, "output.zip", that contains the compressed
contents of the files "alpha.txt" and "beta.txt"
use strict ;
use warnings ;
use IO::Compress::Zip qw(zip $ZipError) ;
zip [ 'alpha.txt', 'beta.txt' ] => 'output.zip'
or die "zip failed: $ZipError\n";
Alternatively, rather than having to explicitly name each of the files that you
want to compress, you could use a fileglob to select all the "txt"
files in the current directory, as follows
use strict ;
use warnings ;
use IO::Compress::Zip qw(zip $ZipError) ;
my @files = <*.txt>;
zip \@files => 'output.zip'
or die "zip failed: $ZipError\n";
or more succinctly
zip [ <*.txt> ] => 'output.zip'
or die "zip failed: $ZipError\n";
OO Interface¶
Constructor¶
The format of the constructor for "IO::Compress::Zip" is shown below
my $z = new IO::Compress::Zip $output [,OPTS]
or die "IO::Compress::Zip failed: $ZipError\n";
It returns an "IO::Compress::Zip" object on success and undef on
failure. The variable $ZipError will contain an error message on failure.
If you are running Perl 5.005 or better the object, $z, returned from
IO::Compress::Zip can be used exactly like an IO::File filehandle. This means
that all normal output file operations can be carried out with $z. For
example, to write to a compressed file/buffer you can use either of these
forms
$z->print("hello world\n");
print $z "hello world\n";
The mandatory parameter $output is used to control the destination of the
compressed data. This parameter can take one of these forms.
- A filename
- If the $output parameter is a simple scalar, it is assumed
to be a filename. This file will be opened for writing and the compressed
data will be written to it.
- A filehandle
- If the $output parameter is a filehandle, the compressed
data will be written to it. The string '-' can be used as an alias for
standard output.
- A scalar reference
- If $output is a scalar reference, the compressed data will
be stored in $$output.
If the $output parameter is any other type, "IO::Compress::Zip"::new
will return undef.
Constructor Options¶
"OPTS" is any combination of the following options:
- "AutoClose => 0|1"
- This option is only valid when the $output parameter is a
filehandle. If specified, and the value is true, it will result in the
$output being closed once either the "close" method is called or
the "IO::Compress::Zip" object is destroyed.
This parameter defaults to 0.
- "Append => 0|1"
- Opens $output in append mode.
The behaviour of this option is dependent on the type of $output.
- •
- A Buffer
If $output is a buffer and "Append" is enabled, all compressed
data will be append to the end of $output. Otherwise $output will be
cleared before any data is written to it.
- •
- A Filename
If $output is a filename and "Append" is enabled, the file will be
opened in append mode. Otherwise the contents of the file, if any, will be
truncated before any compressed data is written to it.
- •
- A Filehandle
If $output is a filehandle, the file pointer will be positioned to the end
of the file via a call to "seek" before any compressed data is
written to it. Otherwise the file pointer will not be moved.
This parameter defaults to 0.
- "Name => $string"
- Stores the contents of $string in the zip filename header
field.
If "Name" is not specified and the $input parameter is a filename,
the value of $input will be used for the zip filename header field.
If "Name" is not specified and the $input parameter is not a
filename, no zip filename field will be created.
Note that both the "CanonicalName" and "FilterName"
options can modify the value used for the zip filename header field.
- "CanonicalName => 0|1"
- This option controls whether the filename field in the zip
header is normalized into Unix format before being written to the
zip file.
It is recommended that you enable this option unless you really need to
create a non-standard Zip file.
This is what APPNOTE.TXT has to say on what should be stored in the zip
filename header field.
The name of the file, with optional relative path.
The path stored should not contain a drive or
device letter, or a leading slash. All slashes
should be forward slashes '/' as opposed to
backwards slashes '\' for compatibility with Amiga
and UNIX file systems etc.
This option defaults to false.
- "FilterName => sub { ... }"
- This option allow the filename field in the zip header to
be modified before it is written to the zip file.
This option takes a parameter that must be a reference to a sub. On entry to
the sub the $_ variable will contain the name to be filtered. If no
filename is available $_ will contain an empty string.
The value of $_ when the sub returns will be stored in the filename header
field.
Note that if "CanonicalName" is enabled, a normalized filename
will be passed to the sub.
If you use "FilterName" to modify the filename, it is your
responsibility to keep the filename in Unix format.
Although this option can be used with the OO ointerface, it is of most use
with the one-shot interface. For example, the code below shows how
"FilterName" can be used to remove the path component from a
series of filenames before they are stored in $zipfile.
sub compressTxtFiles
{
my $zipfile = shift ;
my $dir = shift ;
zip [ <$dir/*.txt> ] => $zipfile,
FilterName => sub { s[^$dir/][] } ;
}
- "Time => $number"
- Sets the last modified time field in the zip header to
$number.
This field defaults to the time the "IO::Compress::Zip" object was
created if this option is not specified and the $input parameter is not a
filename.
- "ExtAttr => $attr"
- This option controls the "external file
attributes" field in the central header of the zip file. This is a 4
byte field.
If you are running a Unix derivative this value defaults to
0100644 << 16
This should allow read/write access to any files that are extracted from the
zip file/buffer`.
For all other systems it defaults to 0.
- "exTime => [$atime, $mtime, $ctime]"
- This option expects an array reference with exactly three
elements: $atime, "mtime" and $ctime. These correspond to the
last access time, last modification time and creation time respectively.
It uses these values to set the extended timestamp field (ID is
"UT") in the local zip header using the three values, $atime,
$mtime, $ctime. In addition it sets the extended timestamp field in the
central zip header using $mtime.
If any of the three values is "undef" that time value will not be
used. So, for example, to set only the $mtime you would use this
exTime => [undef, $mtime, undef]
If the "Minimal" option is set to true, this option will be
ignored.
By default no extended time field is created.
- "exUnix2 => [$uid, $gid]"
- This option expects an array reference with exactly two
elements: $uid and $gid. These values correspond to the numeric User ID
(UID) and Group ID (GID) of the owner of the files respectively.
When the "exUnix2" option is present it will trigger the creation
of a Unix2 extra field (ID is "Ux") in the local zip header.
This will be populated with $uid and $gid. An empty Unix2 extra field will
also be created in the central zip header.
Note - The UID & GID are stored as 16-bit integers in the "Ux"
field. Use "exUnixN" if your UID or GID are 32-bit.
If the "Minimal" option is set to true, this option will be
ignored.
By default no Unix2 extra field is created.
- "exUnixN => [$uid, $gid]"
- This option expects an array reference with exactly two
elements: $uid and $gid. These values correspond to the numeric User ID
(UID) and Group ID (GID) of the owner of the files respectively.
When the "exUnixN" option is present it will trigger the creation
of a UnixN extra field (ID is "ux") in bothe the local and
central zip headers. This will be populated with $uid and $gid. The UID
& GID are stored as 32-bit integers.
If the "Minimal" option is set to true, this option will be
ignored.
By default no UnixN extra field is created.
- "Comment => $comment"
- Stores the contents of $comment in the Central File Header
of the zip file.
By default, no comment field is written to the zip file.
- "ZipComment => $comment"
- Stores the contents of $comment in the End of Central
Directory record of the zip file.
By default, no comment field is written to the zip file.
- "Method => $method"
- Controls which compression method is used. At present four
compression methods are supported, namely Store (no compression at all),
Deflate, Bzip2 and Lzma.
The symbols, ZIP_CM_STORE, ZIP_CM_DEFLATE, ZIP_CM_BZIP2 and ZIP_CM_LZMA are
used to select the compression method.
These constants are not imported by "IO::Compress::Zip" by
default.
use IO::Compress::Zip qw(:zip_method);
use IO::Compress::Zip qw(:constants);
use IO::Compress::Zip qw(:all);
Note that to create Bzip2 content, the module
"IO::Compress::Bzip2" must be installed. A fatal error will be
thrown if you attempt to create Bzip2 content when
"IO::Compress::Bzip2" is not available.
Note that to create Lzma content, the module "IO::Compress::Lzma"
must be installed. A fatal error will be thrown if you attempt to create
Lzma content when "IO::Compress::Lzma" is not available.
The default method is ZIP_CM_DEFLATE.
- "Stream => 0|1"
- This option controls whether the zip file/buffer output is
created in streaming mode.
Note that when outputting to a file with streaming mode disabled
("Stream" is 0), the output file must be seekable.
The default is 1.
- "Zip64 => 0|1"
- Create a Zip64 zip file/buffer. This option is used if you
want to store files larger than 4 Gig or store more than 64K files in a
single zip archive..
"Zip64" will be automatically set, as needed, if working with the
one-shot interface when the input is either a filename or a scalar
reference.
If you intend to manipulate the Zip64 zip files created with this module
using an external zip/unzip, make sure that it supports Zip64.
In particular, if you are using Info-Zip you need to have zip version 3.x or
better to update a Zip64 archive and unzip version 6.x to read a zip64
archive.
The default is 0.
- "TextFlag => 0|1"
- This parameter controls the setting of a bit in the zip
central header. It is used to signal that the data stored in the zip
file/buffer is probably text.
In one-shot mode this flag will be set to true if the Perl "-T"
operator thinks the file contains text.
The default is 0.
- "ExtraFieldLocal => $data" =item
"ExtraFieldCentral => $data"
- The "ExtraFieldLocal" option is used to store
additional metadata in the local header for the zip file/buffer. The
"ExtraFieldCentral" does the same for the matching central
header.
An extra field consists of zero or more subfields. Each subfield consists of
a two byte header followed by the subfield data.
The list of subfields can be supplied in any of the following formats
ExtraFieldLocal => [$id1, $data1,
$id2, $data2,
...
]
ExtraFieldLocal => [ [$id1 => $data1],
[$id2 => $data2],
...
]
ExtraFieldLocal => { $id1 => $data1,
$id2 => $data2,
...
}
Where $id1, $id2 are two byte subfield ID's.
If you use the hash syntax, you have no control over the order in which the
ExtraSubFields are stored, plus you cannot have SubFields with duplicate
ID.
Alternatively the list of subfields can by supplied as a scalar, thus
ExtraField => $rawdata
In this case "IO::Compress::Zip" will check that $rawdata consists
of zero or more conformant sub-fields.
The Extended Time field (ID "UT"), set using the
"exTime" option, and the Unix2 extra field (ID "Ux), set
using the "exUnix2" option, are examples of extra fields.
If the "Minimal" option is set to true, this option will be
ignored.
The maximum size of an extra field 65535 bytes.
- "Minimal => 1|0"
- If specified, this option will disable the creation of all
extra fields in the zip local and central headers. So the
"exTime", "exUnix2", "exUnixN",
"ExtraFieldLocal" and "ExtraFieldCentral" options will
be ignored.
This parameter defaults to 0.
- "BlockSize100K => number"
- Specify the number of 100K blocks bzip2 uses during
compression.
Valid values are from 1 to 9, where 9 is best compression.
This option is only valid if the "Method" is ZIP_CM_BZIP2. It is
ignored otherwise.
The default is 1.
- "WorkFactor => number"
- Specifies how much effort bzip2 should take before
resorting to a slower fallback compression algorithm.
Valid values range from 0 to 250, where 0 means use the default value 30.
This option is only valid if the "Method" is ZIP_CM_BZIP2. It is
ignored otherwise.
The default is 0.
- "Preset => number"
- Used to choose the LZMA compression preset.
Valid values are 0-9 and "LZMA_PRESET_DEFAULT".
0 is the fastest compression with the lowest memory usage and the lowest
compression.
9 is the slowest compession with the highest memory usage but with the best
compression.
This option is only valid if the "Method" is ZIP_CM_LZMA. It is
ignored otherwise.
Defaults to "LZMA_PRESET_DEFAULT" (6).
- "Extreme => 0|1"
- Makes LZMA compression a lot slower, but a small
compression gain.
This option is only valid if the "Method" is ZIP_CM_LZMA. It is
ignored otherwise.
Defaults to 0.
- -Level
- Defines the compression level used by zlib. The value
should either be a number between 0 and 9 (0 means no compression and 9 is
maximum compression), or one of the symbolic constants defined below.
Z_NO_COMPRESSION
Z_BEST_SPEED
Z_BEST_COMPRESSION
Z_DEFAULT_COMPRESSION
The default is Z_DEFAULT_COMPRESSION.
Note, these constants are not imported by "IO::Compress::Zip" by
default.
use IO::Compress::Zip qw(:strategy);
use IO::Compress::Zip qw(:constants);
use IO::Compress::Zip qw(:all);
- -Strategy
- Defines the strategy used to tune the compression. Use one
of the symbolic constants defined below.
Z_FILTERED
Z_HUFFMAN_ONLY
Z_RLE
Z_FIXED
Z_DEFAULT_STRATEGY
The default is Z_DEFAULT_STRATEGY.
- "Strict => 0|1"
- This is a placeholder option.
Examples¶
TODO
Methods¶
print¶
Usage is
$z->print($data)
print $z $data
Compresses and outputs the contents of the $data parameter. This has the same
behaviour as the "print" built-in.
Returns true if successful.
printf¶
Usage is
$z->printf($format, $data)
printf $z $format, $data
Compresses and outputs the contents of the $data parameter.
Returns true if successful.
syswrite¶
Usage is
$z->syswrite $data
$z->syswrite $data, $length
$z->syswrite $data, $length, $offset
Compresses and outputs the contents of the $data parameter.
Returns the number of uncompressed bytes written, or "undef" if
unsuccessful.
write¶
Usage is
$z->write $data
$z->write $data, $length
$z->write $data, $length, $offset
Compresses and outputs the contents of the $data parameter.
Returns the number of uncompressed bytes written, or "undef" if
unsuccessful.
flush¶
Usage is
$z->flush;
$z->flush($flush_type);
Flushes any pending compressed data to the output file/buffer.
This method takes an optional parameter, $flush_type, that controls how the
flushing will be carried out. By default the $flush_type used is
"Z_FINISH". Other valid values for $flush_type are
"Z_NO_FLUSH", "Z_SYNC_FLUSH", "Z_FULL_FLUSH" and
"Z_BLOCK". It is strongly recommended that you only set the
"flush_type" parameter if you fully understand the implications of
what it does - overuse of "flush" can seriously degrade the level of
compression achieved. See the "zlib" documentation for details.
Returns true on success.
tell¶
Usage is
$z->tell()
tell $z
Returns the uncompressed file offset.
eof¶
Usage is
$z->eof();
eof($z);
Returns true if the "close" method has been called.
seek¶
$z->seek($position, $whence);
seek($z, $position, $whence);
Provides a sub-set of the "seek" functionality, with the restriction
that it is only legal to seek forward in the output file/buffer. It is a fatal
error to attempt to seek backward.
Empty parts of the file/buffer will have NULL (0x00) bytes written to them.
The $whence parameter takes one the usual values, namely SEEK_SET, SEEK_CUR or
SEEK_END.
Returns 1 on success, 0 on failure.
binmode¶
Usage is
$z->binmode
binmode $z ;
This is a noop provided for completeness.
opened¶
$z->opened()
Returns true if the object currently refers to a opened file/buffer.
autoflush¶
my $prev = $z->autoflush()
my $prev = $z->autoflush(EXPR)
If the $z object is associated with a file or a filehandle, this method returns
the current autoflush setting for the underlying filehandle. If
"EXPR" is present, and is non-zero, it will enable flushing after
every write/print operation.
If $z is associated with a buffer, this method has no effect and always returns
"undef".
Note that the special variable $|
cannot be used to set or
retrieve the autoflush setting.
$z->input_line_number()
$z->input_line_number(EXPR)
This method always returns "undef" when compressing.
fileno¶
$z->fileno()
fileno($z)
If the $z object is associated with a file or a filehandle, "fileno"
will return the underlying file descriptor. Once the "close" method
is called "fileno" will return "undef".
If the $z object is associated with a buffer, this method will return
"undef".
close¶
$z->close() ;
close $z ;
Flushes any pending compressed data and then closes the output file/buffer.
For most versions of Perl this method will be automatically invoked if the
IO::Compress::Zip object is destroyed (either explicitly or by the variable
with the reference to the object going out of scope). The exceptions are Perl
versions 5.005 through 5.00504 and 5.8.0. In these cases, the
"close" method will be called automatically, but not until global
destruction of all live objects when the program is terminating.
Therefore, if you want your scripts to be able to run on all versions of Perl,
you should call "close" explicitly and not rely on automatic
closing.
Returns true on success, otherwise 0.
If the "AutoClose" option has been enabled when the IO::Compress::Zip
object was created, and the object is associated with a file, the underlying
file will also be closed.
newStream([OPTS])¶
Usage is
$z->newStream( [OPTS] )
Closes the current compressed data stream and starts a new one.
OPTS consists of any of the the options that are available when creating the $z
object.
See the "Constructor Options" section for more details.
deflateParams¶
Usage is
$z->deflateParams
TODO
Importing¶
A number of symbolic constants are required by some methods in
"IO::Compress::Zip". None are imported by default.
- :all
- Imports "zip", $ZipError and all symbolic
constants that can be used by "IO::Compress::Zip". Same as doing
this
use IO::Compress::Zip qw(zip $ZipError :constants) ;
- :constants
- Import all symbolic constants. Same as doing this
use IO::Compress::Zip qw(:flush :level :strategy :zip_method) ;
- :flush
- These symbolic constants are used by the "flush"
method.
Z_NO_FLUSH
Z_PARTIAL_FLUSH
Z_SYNC_FLUSH
Z_FULL_FLUSH
Z_FINISH
Z_BLOCK
- :level
- These symbolic constants are used by the "Level"
option in the constructor.
Z_NO_COMPRESSION
Z_BEST_SPEED
Z_BEST_COMPRESSION
Z_DEFAULT_COMPRESSION
- :strategy
- These symbolic constants are used by the
"Strategy" option in the constructor.
Z_FILTERED
Z_HUFFMAN_ONLY
Z_RLE
Z_FIXED
Z_DEFAULT_STRATEGY
- :zip_method
- These symbolic constants are used by the "Method"
option in the constructor.
ZIP_CM_STORE
ZIP_CM_DEFLATE
ZIP_CM_BZIP2
EXAMPLES¶
Apache::GZip Revisited¶
See IO::Compress::FAQ
Working with Net::FTP¶
See IO::Compress::FAQ
SEE ALSO¶
Compress::Zlib, IO::Compress::Gzip, IO::Uncompress::Gunzip,
IO::Compress::Deflate, IO::Uncompress::Inflate, IO::Compress::RawDeflate,
IO::Uncompress::RawInflate, IO::Compress::Bzip2, IO::Uncompress::Bunzip2,
IO::Compress::Lzma, IO::Uncompress::UnLzma, IO::Compress::Xz,
IO::Uncompress::UnXz, IO::Compress::Lzop, IO::Uncompress::UnLzop,
IO::Compress::Lzf, IO::Uncompress::UnLzf, IO::Uncompress::AnyInflate,
IO::Uncompress::AnyUncompress
IO::Compress::FAQ
File::GlobMapper, Archive::Zip, Archive::Tar, IO::Zlib
For RFC 1950, 1951 and 1952 see
http://www.faqs.org/rfcs/rfc1950.html,
http://www.faqs.org/rfcs/rfc1951.html and
http://www.faqs.org/rfcs/rfc1952.html
The
zlib compression library was written by Jean-loup Gailly
gzip@prep.ai.mit.edu and Mark Adler
madler@alumni.caltech.edu.
The primary site for the
zlib compression library is
http://www.zlib.org.
The primary site for gzip is
http://www.gzip.org.
AUTHOR¶
This module was written by Paul Marquess,
pmqs@cpan.org.
MODIFICATION HISTORY¶
See the Changes file.
COPYRIGHT AND LICENSE¶
Copyright (c) 2005-2012 Paul Marquess. All rights reserved.
This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.