ZipDirectoryReader Class Reference

A class for reading ZIP file directories, for the purposes of upload verification. More...

Static Public Member Functions
static	read ( $fileName, $callback, $options=[])
	Read a ZIP file and call a function for each file discovered in it.
static	readHandle ( $file, $callback, $options=[])
	Read an opened file handle presumed to be a ZIP and call a function for each file discovered in it.

Protected Member Functions
	__construct ( $file, $callback, $options)

Protected Attributes
	$buffer
	A segmented cache of the file contents.
	$callback
	The file data callback.
	$data
	$eocdr
	Stored headers.
	$eocdr64
	$eocdr64Locator
	$file
	The opened file resource.
	$fileLength
	The cached length of the file, or null if it has not been loaded yet.
	$zip64 = false
	The ZIP64 mode.

Detailed Description

A class for reading ZIP file directories, for the purposes of upload verification.

Only a functional interface is provided: ZipFileReader::read(). No access is given to object instances.

Definition at line 30 of file ZipDirectoryReader.php.

Constructor & Destructor Documentation

__construct()

ZipDirectoryReader::__construct ( $file, $callback, $options )

protected

Parameters

resource	$file
callable	$callback
array	$options

Definition at line 147 of file ZipDirectoryReader.php.

References $callback, and $file.

Member Function Documentation

read()

static ZipDirectoryReader::read ( $fileName, $callback, $options = [] )

static

Read a ZIP file and call a function for each file discovered in it.

Because this class is aimed at verification, an error is raised on suspicious or ambiguous input, instead of emulating some standard behavior.

Parameters

string	$fileName	The archive file name
callable	$callback	The callback function. It will be called for each file with a single associative array each time, with members:

• name: The file name. Directories conventionally have a trailing slash.
• mtime: The file modification time, in MediaWiki 14-char format
• size: The uncompressed file size

Parameters

array

$options

An associative array of read options, with the option name in the key. This may currently contain:

• zip64: If this is set to true, then we will emulate a library with ZIP64 support, like OpenJDK 7. If it is set to false, then we will emulate a library with no knowledge of ZIP64.

  NOTE: The ZIP64 code is untested and probably doesn't work. It turned out to be easier to just reject ZIP64 archive uploads, since they are likely to be very rare. Confirming safety of a ZIP64 file is fairly complex. What do you do with a file that is ambiguous and broken when read with a non-ZIP64 reader, but valid when read with a ZIP64 reader? This situation is normal for a valid ZIP64 file, and working out what non-ZIP64 readers will make of such a file is not trivial.

Returns

Status A Status object. The following fatal errors are defined:

 - zip-file-open-error: The file could not be opened.

 - zip-wrong-format: The file does not appear to be a ZIP file.

 - zip-bad: There was something wrong or ambiguous about the file
   data.

 - zip-unsupported: The ZIP file uses features which
   ZipDirectoryReader does not support.

The default messages for those fatal errors are written in a way that makes sense for upload verification.

If a fatal error is returned, more information about the error will be available in the debug log.

Note that the callback function may be called any number of times before a fatal error is returned. If this occurs, the data sent to the callback function should be discarded.

Definition at line 88 of file ZipDirectoryReader.php.

References $callback, and $file.

readHandle()

static ZipDirectoryReader::readHandle ( $file, $callback, $options = [] )

static

Read an opened file handle presumed to be a ZIP and call a function for each file discovered in it.

See also

ZipDirectoryReader::read

Parameters

resource	$file	A seekable stream containing the archive
callable	$callback
array	$options

Returns

Status

Definition at line 105 of file ZipDirectoryReader.php.

References $callback, and $file.

Member Data Documentation

$buffer

ZipDirectoryReader::$buffer

protected

A segmented cache of the file contents.

Definition at line 117 of file ZipDirectoryReader.php.

$callback

ZipDirectoryReader::$callback

protected

The file data callback.

Definition at line 120 of file ZipDirectoryReader.php.

Referenced by __construct(), read(), and readHandle().

$data

ZipDirectoryReader::$data

protected

Definition at line 128 of file ZipDirectoryReader.php.

$eocdr

ZipDirectoryReader::$eocdr

protected

Stored headers.

Definition at line 126 of file ZipDirectoryReader.php.

$eocdr64

ZipDirectoryReader::$eocdr64

protected

Definition at line 126 of file ZipDirectoryReader.php.

$eocdr64Locator

ZipDirectoryReader::$eocdr64Locator

protected

Definition at line 126 of file ZipDirectoryReader.php.

$file

ZipDirectoryReader::$file

protected

The opened file resource.

Definition at line 111 of file ZipDirectoryReader.php.

Referenced by __construct(), read(), and readHandle().

$fileLength

ZipDirectoryReader::$fileLength

protected

The cached length of the file, or null if it has not been loaded yet.

Definition at line 114 of file ZipDirectoryReader.php.

$zip64

ZipDirectoryReader::$zip64 = false

protected

The ZIP64 mode.

Definition at line 123 of file ZipDirectoryReader.php.

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The documentation for this class was generated from the following file:

• includes/utils/ZipDirectoryReader.php