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Read large file header (~9GB) inside tarfile without full extraction


Read large file header (~9GB) inside tarfile without full extraction

By : rrecroc
Date : November 22 2020, 09:00 AM
wish of those help I think you should use the standard library bz2 interface. .tbz is the file extension for tar files that are compressed with the -j option to specify a bzip2 format.
As @bbayles pointed out in the comments, you can open your file as a bz2.BZ2File and use seek and read:
code :
f = bz2.BZ2File(path)
f.seek(512) 
headerbytes = f.read(1024)
headerdict = parseHeader(headerbytes)


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How to write a large amount of data in a tarfile in python without using temporary file

How to write a large amount of data in a tarfile in python without using temporary file


By : user1440451
Date : March 29 2020, 07:55 AM
this will help You can create an own file-like object and pass to TarFile.addfile. Your file-like object will generate the encrypted contents on the fly in the fileobj.read() method.
Python tarfile module overwrites existing files during extraction - how to disable it?

Python tarfile module overwrites existing files during extraction - how to disable it?


By : Ahmed Zedan
Date : March 29 2020, 07:55 AM
Does that help You could check result of tarfile.getnames against the existing files and raise your error.
python: tarfile extraction error IOError: [Errno 22] invalid mode ('wb') or filename

python: tarfile extraction error IOError: [Errno 22] invalid mode ('wb') or filename


By : GirlL
Date : March 29 2020, 07:55 AM
it should still fix some issue I'm extracting a file using tarfile. Unfortunately this compressed file came from a linux server, and contains several files that contain illegal Windows OS characters for files (':').
code :
extract = tarfile.open(file)
for f in extract:
    # add other unsavory characters in the brackets
    f.name = re.sub(r'[:]', '_', f.name)
extract.extractall(path=new_path)
extract.close()
python tarfile unpredictable error tarfile.ReadError: empty header

python tarfile unpredictable error tarfile.ReadError: empty header


By : Anria B.
Date : March 29 2020, 07:55 AM
may help you . This exception is raised when the buffer length is zero while parsing headers for the tarfile. It is raised for an empty archive.
Reference: https://github.com/python/cpython/blob/master/Lib/tarfile.py#L1028 http://bugs.python.org/issue6123
tarfile.extractall() raises IsADirectoryError because extraction path exists

tarfile.extractall() raises IsADirectoryError because extraction path exists


By : user49823
Date : March 29 2020, 07:55 AM
it helps some times It looks like the problem is in the arcname parameter when creating the tar.gz file. I was (wrongly) following the advice in this comment. However, that should only be done when packing a directory, it corrupts the tar.gz file is used when adding individual files.
Changing/removing the arcname parameter in tarfile.add() fixes it:
code :
# Create the tarfile
compressed_file = 'packet.tgz'
with tarfile.open(compressed_file, 'w:gz') as tar:
    for f in os.listdir():
        tar.add(f)
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