iso8583 - a Python package for parsing ISO8583 data
===================================================
|pypi| |docs| |coverage|
``iso8583`` package serializes and deserializes ISO8583 data between
raw ``bytes`` ISO8583 data and a regular Python ``dict``.
``iso8583`` package supports custom `specifications <https://pyiso8583.readthedocs.io/en/latest/specifications.html>`_
that can define:
- Field length and data encoding, such as BCD, ASCII, EBCDIC, etc.
- Field length count measured in bytes or nibbles.
- Field type, such as fixed, LLVAR, LLLVAR, etc.
- Maximum length
- Optional field description
Multiple specifications can co-exist to support ISO8583 messages for POS, ATM,
file actions, and so on. Simply define a new specification dictionary. ``iso8583``
package includes a starter specification in ``iso8583.specs`` module that can be
used as a base to create own custom/proprietary specifications.
Additional information is available on `Read The Docs <http://pyiso8583.readthedocs.org>`_.
Installation
------------
``iso8583`` is published on `PyPI`__ as ``pyiso8583`` and can be installed from there:
.. code-block::
pip install pyiso8583
__ https://pypi.org/project/pyiso8583/
Encoding & Decoding
-------------------
Use `iso8583.decode <https://pyiso8583.readthedocs.io/en/latest/functions.html#iso8583.decode>`_
to decode raw ISO8583 message.
It returns two dictionaries: one with decoded data and one with encoded data.
.. code-block:: python
>>> import pprint
>>> import iso8583
>>> from iso8583.specs import default_ascii as spec
>>> encoded_raw = b'02004000000000000000101234567890'
>>> decoded, encoded = iso8583.decode(encoded_raw, spec)
>>> pprint.pp(decoded)
{'t': '0200', 'p': '4000000000000000', '2': '1234567890'}
>>> pprint.pp(encoded)
{'t': {'len': b'', 'data': b'0200'},
'p': {'len': b'', 'data': b'4000000000000000'},
'2': {'len': b'10', 'data': b'1234567890'}}
Modify the decoded message to send a response back.
Change message type from '0200' to '0210'.
Remove field 2 (PAN). And add field 39 (Response Code).
.. code-block:: python
>>> decoded['t'] = '0210'
>>> decoded.pop('2', None)
'1234567890'
>>> decoded['39'] = '05'
Use `iso8583.encode <https://pyiso8583.readthedocs.io/en/latest/functions.html#iso8583.encode>`_
to encode updated ISO8583 message.
It returns a raw ISO8583 message and a dictionary with encoded data.
.. code-block:: python
>>> encoded_raw, encoded = iso8583.encode(decoded, spec)
>>> encoded_raw
bytearray(b'0210000000000200000005')
>>> pprint.pp(decoded)
{'t': '0210', 'p': '0000000002000000', '39': '05'}
>>> pprint.pp(encoded)
{'t': {'len': b'', 'data': b'0210'},
'p': {'len': b'', 'data': b'0000000002000000'},
'39': {'len': b'', 'data': b'05'}}
Pretty Print Messages
---------------------
Use `iso8583.pp <https://pyiso8583.readthedocs.io/en/latest/functions.html#iso8583.pp>`_
to pretty print ISO8583 message.
.. code-block:: python
>>> import iso8583
>>> from iso8583.specs import default_ascii as spec
>>> encoded_raw = b'02004000000000000000101234567890'
>>> decoded, encoded = iso8583.decode(encoded_raw, spec)
>>> iso8583.pp(decoded, spec)
t Message Type : '0200'
p Bitmap, Primary : '4000000000000000'
2 Primary Account Number (PAN) : '1234567890'
>>> iso8583.pp(encoded, spec)
t Message Type : b'0200'
p Bitmap, Primary : b'4000000000000000'
2 Primary Account Number (PAN) : b'10' b'1234567890'
Contribute
----------
``iso8583`` package is hosted on `GitHub <https://github.com/knovichikhin/pyiso8583>`_.
Feel free to fork and send contributions over.
.. |pypi| image:: https://img.shields.io/pypi/v/pyiso8583.svg
:alt: PyPI
:target: https://pypi.org/project/pyiso8583/
.. |docs| image:: https://readthedocs.org/projects/pyiso8583/badge/?version=latest
:alt: Documentation Status
:target: https://pyiso8583.readthedocs.io/en/latest/?badge=latest
.. |coverage| image:: https://codecov.io/gh/knovichikhin/pyiso8583/branch/master/graph/badge.svg
:alt: Test coverage
:target: https://codecov.io/gh/knovichikhin/pyiso8583
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