KZip

KDE 4.5 PyKDE API Reference

- KDE's Python API

# KZip Class Reference

`from PyKDE4.kio import *`

Inherits: KArchive

## Detailed Description

A class for reading / writing zip archives.

You can use it in QIODevice.ReadOnly or in QIODevice.WriteOnly mode, and it behaves just as expected. It can also be used in QIODevice.ReadWrite mode, in this case one can append files to an existing zip archive. When you append new files, which are not yet in the zip, it works as expected, i.e. the files are appended at the end. When you append a file, which is already in the file, the reference to the old file is dropped and the new one is added to the zip - but the old data from the file itself is not deleted, it is still in the zipfile. So when you want to have a small and garbage-free zipfile, just read the contents of the appended zip file and write it to a new one in QIODevice.WriteOnly mode. This is especially important when you don't want to leak information of how intermediate versions of files in the zip were looking.

For more information on the zip fileformat go to http://www.pkware.com/products/enterprise/white_papers/appnote.html

Author:
  Holger Schroeder <holger-kde@holgis.net>

## Enumerations
Compression | { NoCompression, DeflateCompression }
ExtraField | { NoExtraField, ModificationTime, DefaultExtraField }
## Methods
| __init__ (self, QString filename)
| __init__ (self, QIODevice dev)
| __init__ (self, KZip other)
bool | closeArchive (self)
KZip.Compression | compression (self)
bool | doFinishWriting (self, long size)
bool | doPrepareWriting (self, QString name, QString user, QString group, long size, long perm, long atime, long mtime, long ctime)
bool | doWriteDir (self, QString name, QString user, QString group, long perm, long atime, long mtime, long ctime)
bool | doWriteSymLink (self, QString name, QString target, QString user, QString group, long perm, long atime, long mtime, long ctime)
KZip.ExtraField | extraField (self)
bool | openArchive (self, QIODevice.OpenMode mode)
| setCompression (self, KZip.Compression c)
| setExtraField (self, KZip.ExtraField ef)
bool | writeData (self, QString data, long size)

## Method Documentation

__init__ | ( | self, |
|  | QString | filename
| ) |  |  |

Creates an instance that operates on the given filename. using the compression filter associated to given mimetype.

Parameters:

  | filename | is a local path (e.g. "/home/holger/myfile.zip")

__init__ | ( | self, |
|  | QIODevice | dev
| ) |  |  |

Creates an instance that operates on the given device. The device can be compressed (KFilterDev) or not (QFile, etc.).

Warning:
  Do not assume that giving a QFile here will decompress the file, in case it's compressed!

Parameters:

  | dev | the device to access

__init__ | ( | self, |
|  | KZip | other
| ) |  |  |

bool closeArchive | ( |  | self ) |

KZip.Compression compression | ( |  | self ) |

The current compression mode that will be used for new files.

Returns:
  the current compression mode

See also:
  setCompression()

bool doFinishWriting | ( | self, |
|  | long | size
| ) |  |  |

Write data to a file that has been created using prepareWriting().

Parameters:

  | size | the size of the file

Returns:
  true if successful, false otherwise

bool doPrepareWriting | ( | self, |
|  | QString | name,
|  | QString | user,
|  | QString | group,
|  | long | size,
|  | long | perm,
|  | long | atime,
|  | long | mtime,
|  | long | ctime
| ) |  |  |

bool doWriteDir | ( | self, |
|  | QString | name,
|  | QString | user,
|  | QString | group,
|  | long | perm,
|  | long | atime,
|  | long | mtime,
|  | long | ctime
| ) |  |  |

bool doWriteSymLink | ( | self, |
|  | QString | name,
|  | QString | target,
|  | QString | user,
|  | QString | group,
|  | long | perm,
|  | long | atime,
|  | long | mtime,
|  | long | ctime
| ) |  |  |

KZip.ExtraField extraField | ( |  | self ) |

The current type of "extra field" that will be used for new files.

Returns:
  the current type of "extra field"

See also:
  setExtraField()

bool openArchive | ( | self, |
|  | QIODevice.OpenMode | mode
| ) |  |  |

Opens the archive for reading. Parses the directory listing of the archive and creates the KArchiveDirectory/KArchiveFile entries.

Parameters:

  | mode | the mode of the file

setCompression | ( | self, |
|  | KZip.Compression | c
| ) |  |  |

Call this before writeFile or prepareWriting, to define whether the next files to be written should be compressed or not.

Parameters:

  | c | the new compression mode

See also:
  compression()

setExtraField | ( | self, |
|  | KZip.ExtraField | ef
| ) |  |  |

Call this before writeFile or prepareWriting, to define what the next file to be written should have in its extra field.

Parameters:

  | ef | the type of "extra field"

See also:
  extraField()

bool writeData | ( | self, |
|  | QString | data,
|  | long | size
| ) |  |  |

Write data to a file that has been created using prepareWriting().

Parameters:

  | data | a pointer to the data
  | size | the size of the chunk

Returns:
  true if successful, false otherwise

## Enumeration Documentation

Compression

Describes the compression type for a given file in the Zip archive.

Enumerator:

  NoCompression = 0 |
  DeflateCompression = 1 |

ExtraField

Describes the contents of the "extra field" for a given file in the Zip archive.

Enumerator:

  NoExtraField = 0 |
  ModificationTime = 1 |
  DefaultExtraField = 1 |