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https://github.com/chrysn/aiocoap

The Python CoAP library
https://github.com/chrysn/aiocoap

asyncio coap internet-of-things oscore python

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The Python CoAP library

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README 

        
aiocoap -- The Python CoAP library

==================================



The aiocoap package is an implementation of CoAP, the `Constrained Application

Protocol`_.



It is written in Python 3 using its `native asyncio`_ methods to facilitate

concurrent operations while maintaining an easy to use interface.



.. _`Constrained Application Protocol`: http://coap.space/

.. _`native asyncio`: https://docs.python.org/3/library/asyncio



Usage

-----



For how to use the aiocoap library, have a look at the guidedtour_, or at

the examples_ and tools_ provided.



A full reference is available in the  `API documentation`_.



All examples can be run directly from a source code copy. If you prefer to

install it, the usual Python mechanisms apply (see installation_).



.. _`API documentation`: http://aiocoap.readthedocs.io/en/latest/api.html



Features / Standards

--------------------



This library supports the following standards in full or partially:



* RFC7252_ (CoAP): Supported for clients and servers. Multicast is supported on

  the server side, and partially for clients. DTLS is supported but experimental,

  and lacking some security properties. No caching is done inside the library.

* RFC7641_ (Observe): Basic support for clients and servers. Reordering,

  re-registration, and active cancellation are missing.

* RFC7959_ (Blockwise): Supported both for atomic and random access.

* RFC8323_ (TCP, WebSockets): Supports CoAP over TCP, TLS, and WebSockets (both

  over HTTP and HTTPS). The TLS parts are server-certificate only;

  preshared, raw public keys and client certificates are not supported yet.

* RFC7967_ (No-Response): Supported.

* RFC8132_ (PATCH/FETCH): Types and codes known, FETCH observation supported.

* RFC9176_: A standalone resource directory

  server is provided along with a library function to register at one. They

  lack support for groups and security considerations, and are generally rather

  simplistic.

* RFC8613_ (OSCORE): Full support client-side; protected servers can be

  implemented based on it but are not automatic yet.

* draft-ietf-core-oscore-groupcomm-17_ (Group OSCORE): Supported for both group

  and pairwise mode in groups that are fully known. (The lack of an implemented

  joining or persistence mechanism makes this impractical for anything but

  experimentation.)



If something described by one of the standards but not implemented, it is

considered a bug; please file at the `github issue tracker`_. (If it's not on

the list or in the excluded items, file a wishlist item at the same location).



.. _RFC7252: https://tools.ietf.org/html/rfc7252

.. _RFC7641: https://tools.ietf.org/html/rfc7641

.. _RFC7959: https://tools.ietf.org/html/rfc7959

.. _RFC7967: https://tools.ietf.org/html/rfc7967

.. _RFC8132: https://tools.ietf.org/html/rfc8132

.. _RFC8323: https://tools.ietf.org/html/rfc8323

.. _RFC8613: https://tools.ietf.org/html/rfc8613

.. _RFC9176: https://tools.ietf.org/html/rfc9176

.. _draft-ietf-core-oscore-groupcomm-17: https://tools.ietf.org/html/draft-ietf-core-oscore-groupcomm-17



Dependencies

------------



Basic aiocoap works out of the box on Python_ 3.10 or newer (also works on

PyPy3_). For full support (DTLS, OSCORE and link-format handling) follow the

installation_ instructions as these require additional libraries.



aiocoap provides different network backends for different platforms. The most

featureful backend is available for Linux, but most operations work on BSDs,

Windows and macOS as well. See the FAQ_ for more details.



If your library depends on aiocoap, it should pick the required extras (as per

installation_) and declare a dependency like ``aiocoap[linkheader,oscore] >= 0.4b2``.



.. _Python: https://www.python.org/

.. _PyPy3: http://pypy.org/

.. _FAQ: http://aiocoap.readthedocs.io/en/latest/faq.html



Development

-----------



aiocoap tries to stay close to PEP8_ recommendations and general best practice,

and should thus be easy to contribute to.



Bugs (ranging from "design goal" and "wishlist" to typos) are currently tracked

in the `github issue tracker`_. Pull requests are welcome there; if you start

working on larger changes, please coordinate on the issue tracker.



Documentation is built using sphinx_ with ``./setup.py build_sphinx``; hacks

used there are described in ``./doc/README.doc``.



Unit tests are implemented in the ``./tests/`` directory and easiest run using

tox_ (but also available through ``python3 -m unittest`` to test the local environment);

complete test coverage is aimed for, but not yet complete (and might never be,

as the error handling for pathological network partners is hard to trigger with

a library designed not to misbehave). The tests are regularly run at the `CI

suite at gitlab`_, from where `coverage reports`_ are available.



.. _PEP8: http://legacy.python.org/dev/peps/pep-0008/

.. _sphinx: http://sphinx-doc.org/

.. _`github issue tracker`: https://github.com/chrysn/aiocoap/issues

.. _`CI suite at gitlab`: https://gitlab.com/aiocoap/aiocoap/commits/master

.. _`coverage reports`: https://aiocoap.gitlab.io/aiocoap/

.. _tox: https://tox.readthedocs.io/



Relevant URLs

-------------



* https://github.com/chrysn/aiocoap



  This is where the latest source code can be found, and bugs can be reported.

  Generally, this serves as the project web site.



* http://aiocoap.readthedocs.org/



  Online documentation built from the sources.



* https://coap.space/



  Further general information on CoAP, the standard documents involved, and

  other implementations and tools available.



Licensing

---------



aiocoap is published under the MIT License, and follows the best practice of `reuse.software`_.

Files in ``aiocoap/util/vendored/`` may have different (but compatible and OSI approved) licenses.



When using aiocoap for a publication, please cite it according to the output of

``./setup.py cite [--bibtex]``.



Copyright Christian Amsüss and the aiocoap contributors.



aiocoap was originally based on txThings_ by Maciej Wasilak.

The full list of aiocoap contributors can be obtained from the version control history.



.. Any filtering by a mailmap would apply, but no need to state that unless we do get a mailmap.



.. _guidedtour: http://aiocoap.readthedocs.io/en/latest/guidedtour.html

.. _examples: http://aiocoap.readthedocs.io/en/latest/examples.html

.. _tools: http://aiocoap.readthedocs.io/en/latest/tools.html

.. _installation: http://aiocoap.readthedocs.io/en/latest/installation.html

.. _`aiocoap module`: http://aiocoap.readthedocs.io/en/latest/module/aiocoap.html

.. _reuse.software: https://reuse.software/

.. _txThings: https://github.com/siskin/txThings