SAP CAR¶

The following subsections show a graphical representation of the file format portions and how to generate them.

First we need to perform some setup to import the packet classes:

[1]:

from pysap.SAPCAR import *
from IPython.display import display

SAPCAR Archive version 2.00¶

We first create a temporary file and compress it inside an archive file:

[2]:

with open("some_file", "w") as fd:
    fd.write("Some string to compress")

f0 = SAPCARArchive("archive_file.car", mode="wb", version=SAPCAR_VERSION_200)
f0.add_file("some_file")

The file is comprised of the following main structures:

SAPCAR Archive Header¶

[3]:

f0._sapcar.canvas_dump()

[3]:

../_images/fileformats_SAPCAR_7_0.png

SAPCAR Entry Header¶

[4]:

f0._sapcar.files0[0].canvas_dump()

[4]:

../_images/fileformats_SAPCAR_9_0.png

SAPCAR Data Block¶

[5]:

f0._sapcar.files0[0].blocks[0].canvas_dump()

[5]:

../_images/fileformats_SAPCAR_11_0.png

SAPCAR Compressed Data¶

[6]:

f0._sapcar.files0[0].blocks[0].compressed.canvas_dump()

[6]:

../_images/fileformats_SAPCAR_13_0.png

SAPCAR Archive version 2.01¶

[7]:

f1 = SAPCARArchive("archive_file.car", mode="wb", version=SAPCAR_VERSION_201)
f1.add_file("some_file")

The file is comprised of the following main structures:

SAPCAR Archive Header¶

[8]:

f1._sapcar.canvas_dump()

[8]:

../_images/fileformats_SAPCAR_18_0.png

SAPCAR Entry Header¶

[9]:

f1._sapcar.files1[0].canvas_dump()

[9]:

../_images/fileformats_SAPCAR_20_0.png

SAPCAR Data Block¶

[10]:

f1._sapcar.files1[0].blocks[0].canvas_dump()

[10]:

../_images/fileformats_SAPCAR_22_0.png

SAPCAR Compressed data¶

[11]:

f1._sapcar.files1[0].blocks[0].compressed.canvas_dump()

[11]:

../_images/fileformats_SAPCAR_24_0.png

[12]:

from os import remove
remove("some_file")
remove("archive_file.car")