Python tarfile.XHDTYPE Examples

The following are 1 code examples of tarfile.XHDTYPE(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module tarfile , or try the search function .
Example #1
Source File: xtarfile.py    From docker-squash with MIT License 5 votes vote down vote up 
def _create_pax_generic_header(cls, pax_headers, type=tarfile.XHDTYPE):
    """Return a POSIX.1-2001 extended or global header sequence
       that contains a list of keyword, value pairs. The values
       must be unicode objects.
    """
    records = []
    for keyword, value in pax_headers.iteritems():

        try:
            keyword = keyword.encode("utf8")
        except Exception:
            pass

        try:
            value = value.encode("utf8")
        except Exception:
            pass

        l = len(keyword) + len(value) + 3   # ' ' + '=' + '\n'
        n = p = 0
        while True:
            n = l + len(str(p))
            if n == p:
                break
            p = n
        records.append("%d %s=%s\n" % (p, keyword, value))
    records = "".join(records)

    # We use a hardcoded "././@PaxHeader" name like star does
    # instead of the one that POSIX recommends.
    info = {}
    info["name"] = "././@PaxHeader"
    info["type"] = type
    info["size"] = len(records)
    info["magic"] = tarfile.POSIX_MAGIC

    # Create pax header + record blocks.
    return cls._create_header(info, tarfile.USTAR_FORMAT) + \
        cls._create_payload(records)