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:



In [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:



In [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



In [3]:

    
f0._sapcar.canvas_dump()









    Out[3]:

SAPCAR Entry Header



In [4]:

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









    Out[4]:

SAPCAR Data Block



In [5]:

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









    Out[5]:

SAPCAR Compressed Data



In [6]:

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









    Out[6]:

SAPCAR Archive version 2.01

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



In [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



In [8]:

    
f1._sapcar.canvas_dump()









    Out[8]:

SAPCAR Entry Header



In [9]:

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









    Out[9]:

SAPCAR Data Block



In [10]:

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









    Out[10]:

SAPCAR Compressed data



In [11]:

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









    Out[11]:



In [12]:

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