199 lines
8.4 KiB
ReStructuredText
199 lines
8.4 KiB
ReStructuredText
|AbL|
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=====
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*Open-source real-time framework for Web, Mobile & Internet of Things.*
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Latest release: v\ |version| (:ref:`Changelog`)
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.. raw:: html
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<p>
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<a href="https://travis-ci.org/tavendo/AutobahnPython"><img src="https://travis-ci.org/tavendo/AutobahnPython.png?branch=master" alt="Build Status" /></a>
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<a href="http://pypi.python.org/pypi/autobahn"><img src="https://pypip.in/download/autobahn/badge.png" alt="Downloads" /></a>
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</p>
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|AbL| is part of the `Autobahn`_ project and provides open-source implementations of
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* `The WebSocket Protocol <http://tools.ietf.org/html/rfc6455>`_
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* `The Web Application Messaging Protocol (WAMP) <http://wamp.ws/>`_
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in Python 2 and 3, running on `Twisted`_ and `asyncio`_.
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WebSocket allows `bidirectional real-time messaging <http://tavendo.com/blog/post/websocket-why-what-can-i-use-it/>`_ on the Web while `WAMP <http://wamp.ws/>`_ provides applications with `high-level communication abstractions <http://wamp.ws/why/>`_ in an open standard WebSocket based protocol.
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|AbL| features
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* framework for `WebSocket`_ / `WAMP`_ clients and servers
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* compatible with Python 2.6, 2.7, 3.3 and 3.4
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* runs on `CPython`_, `PyPy`_ and `Jython`_
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* runs under `Twisted`_ and `asyncio`_
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* implements WebSocket `RFC6455`_ (and older versions like Hybi-10+ and Hixie-76)
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* implements `WebSocket compression <http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression>`_
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* implements `WAMPv2`_ (and `WAMPv1`_)
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* supports TLS (secure WebSocket) and proxies
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* Open-source (`Apache 2 license <https://github.com/tavendo/AutobahnPython/blob/master/LICENSE>`_)
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and much more.
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Further, |AbL| is written with these goals
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1. high-performance, fully asynchronous and scalable code
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2. best-in-class standards conformance and security
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We do take those design and implementation goals quite serious. For example, |AbL| has 100% strict passes with `AutobahnTestsuite`_, the quasi industry standard of WebSocket protocol test suites we originally created only to test |AbL|;)
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.. note::
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In the following, we will just refer to |Ab| instead of the
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more precise term |AbL| and there is no
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ambiguity.
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What can I do with this stuff?
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------------------------------
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WebSocket is great for apps like **chat**, **trading**, **multi-player games** or **real-time charts**. It allows you to **actively push information** to clients as it happens.
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Further, WebSocket allows you to real-time enable your Web user interfaces: **always current information** without reloads or polling. UIs no longer need to be a boring, static thing. Looking for the right communication technology for your next-generation Web apps? Enter WebSocket.
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And WebSocket works great not only on the Web, but also as a protocol for wiring up the **Internet-of-Things (IoT)**. Connecting a sensor or actor to other application components in real-time over an efficient protocol. Plus: you are using the *same* protocol to connect frontends like Web browsers.
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While WebSocket already is quite awesome, it is still low-level. Which is why we have WAMP. WAMP allows you to **compose your application from loosely coupled components** that talk in real-time with each other - using nice high-level communication patterns ("Remote Procedure Calls" and "Publish & Subscribe").
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WAMP enables application architectures with application code **distributed freely across processes and devices** according to functional aspects. Since WAMP implementations exist for **multiple languages**, WAMP applications can be **polyglot**. Application components can be implemented in a language and run on a device which best fit the particular use case.
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More:
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* `WebSocket - Why, what, and - can I use it? <http://tavendo.com/blog/post/websocket-why-what-can-i-use-it/>`_
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* `Why WAMP? <http://wamp.ws/why/>`_
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Show me some code!
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------------------
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A sample **WebSocket server**:
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.. code-block:: python
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class MyServerProtocol(WebSocketServerProtocol):
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def onConnect(self, request):
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print("Client connecting: {}".format(request.peer))
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def onOpen(self):
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print("WebSocket connection open.")
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def onMessage(self, payload, isBinary):
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if isBinary:
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print("Binary message received: {} bytes".format(len(payload)))
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else:
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print("Text message received: {}".format(payload.decode('utf8')))
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## echo back message verbatim
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self.sendMessage(payload, isBinary)
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def onClose(self, wasClean, code, reason):
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print("WebSocket connection closed: {}".format(reason))
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Complete example code:
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* `WebSocket Echo (Twisted-based) <https://github.com/tavendo/AutobahnPython/tree/master/examples/twisted/websocket/echo>`_
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* `WebSocket Echo (Asyncio-based) <https://github.com/tavendo/AutobahnPython/tree/master/examples/asyncio/websocket/echo>`_
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Introduction to WebSocket Programming with |ab|:
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* :doc:`websocket/programming`
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---------
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A sample **WAMP application component** implementing all client roles:
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.. code-block:: python
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class MyComponent(ApplicationSession):
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@inlineCallbacks
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def onJoin(self, details):
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# 1) subscribe to a topic
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def onevent(msg):
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print("Got event: {}".format(msg))
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yield self.subscribe(onevent, 'com.myapp.hello')
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# 2) publish an event
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self.publish('com.myapp.hello', 'Hello, world!')
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# 3) register a procedure for remoting
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def add2(x, y):
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return x + y
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self.register(add2, 'com.myapp.add2');
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# 4) call a remote procedure
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res = yield self.call('com.myapp.add2', 2, 3)
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print("Got result: {}".format(res))
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Complete example code:
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* **server**, which provides a remote procedure enpoint and publishes to a topic - `Twisted <https://github.com/tavendo/AutobahnPython/blob/master/examples/twisted/wamp/beginner/server.py>`__ - `asyncio <https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/server.py>`__
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* **client**, which calls the procedure and subscribes to the topic - `Twisted <https://github.com/tavendo/AutobahnPython/blob/master/examples/twisted/wamp/beginner/client.py>`__ - `asyncio <https://github.com/tavendo/AutobahnPython/blob/master/examples/asyncio/wamp/beginner/client.py>`__
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Introduction to WAMP Programming with |ab|:
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* :doc:`wamp/programming`
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----------
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Where to start
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--------------
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To get started, jump to :doc:`installation`.
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For developers new to asynchronous programming, Twisted or asyncio, we've collected some useful pointers and information in :doc:`asynchronous-programming`.
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For **WebSocket developers**, :doc:`websocket/programming` explains all you need to know about using |ab| as a WebSocket library, and includes a full reference for the relevant parts of the API.
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:doc:`websocket/examples` lists WebSocket code examples covering a broader range of uses cases and advanced WebSocket features.
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For **WAMP developers**, :doc:`wamp/programming` gives an introduction for programming with WAMP in Python using |ab|.
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:doc:`wamp/examples` lists WAMP code examples covering all features of WAMP.
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Community
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---------
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Development of |ab| takes place on the Github `source repository <https://github.com/tavendo/AutobahnPython>`_.
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.. note::
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We are open for contributions, whether that's code or documentation! Preferably via pull requests.
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We also take **bug reports** at the `issue tracker <https://github.com/tavendo/AutobahnPython/issues>`_.
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The best place to **ask questions** is on the `mailing list <https://groups.google.com/forum/#!forum/autobahnws>`_. We'd also love to hear about your project and what you are using |ab| for!
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Another option is `StackOverflow <http://stackoverflow.com>`_ where `questions <http://stackoverflow.com/questions/tagged/autobahn?sort=newest>`__ related to |ab| are tagged `"autobahn" <http://stackoverflow.com/tags/autobahn/info>`__ (or `"autobahnws" <http://stackoverflow.com/tags/autobahnws/info>`__).
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The best way to **Search the Web** for related material is by using these (base) search terms:
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* `"autobahnpython" <https://www.google.com/search?q=autobahnpython>`__
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* `"autobahnws" <https://www.google.com/search?q=autobahnws>`__
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You can also reach users and developers on **IRC** channel ``#autobahn`` at `freenode.net <http://www.freenode.net/>`__.
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Finally, we are on `Twitter <https://twitter.com/autobahnws>`_.
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.. toctree::
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:hidden:
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installation
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asynchronous-programming
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websocket/programming
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wamp/programming
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websocket/examples
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wamp/examples
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reference/autobahn
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changelog
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