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<div class="section" id="pyst2-a-python-interface-to-asterisk">
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<h1>pyst2: A Python Interface to Asterisk<a class="headerlink" href="#pyst2-a-python-interface-to-asterisk" title="Permalink to this headline">¶</a></h1>
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<a class="reference external image-reference" href="https://pypi.python.org/pypi/pyst2"><img alt="pyst2 Release" src="https://img.shields.io/pypi/v/pyst2.svg" /></a>
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<a class="reference external image-reference" href="https://pypi.python.org/pypi/pyst2"><img alt="pyst2 Downloads" src="https://img.shields.io/pypi/dm/pyst2.svg" /></a>
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<a class="reference external image-reference" href="https://travis-ci.org/rdegges/pyst2"><img alt="pyst2 Build" src="https://img.shields.io/travis/rdegges/pyst2.svg" /></a>
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<img alt="Snake Sketch" src="https://github.com/rdegges/pyst2/raw/master/assets/snake-sketch.jpg" />
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<div class="section" id="meta">
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<h2>Meta<a class="headerlink" href="#meta" title="Permalink to this headline">¶</a></h2>
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<ul class="simple">
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<li>Author: Randall Degges</li>
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<li>Email: <a class="reference external" href="mailto:r%40rdegges.com">r<span>@</span>rdegges<span>.</span>com</a></li>
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<li>Site: <a class="reference external" href="http://www.rdegges.com">http://www.rdegges.com</a></li>
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<li>Status: <em>looking for maintainer</em>, active</li>
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</ul>
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<p><strong>NOTE</strong>: This project is in need of an active maintainer. I’m quite busy with
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other non-asterisk related projects in my personal time, so if you’re a good
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Python programmer, and working with this library and Asterisk on a daily basis
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– please consider maintaining the project! Contact me for more information:
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<a class="reference external" href="mailto:r%40rdegges.com">r<span>@</span>rdegges<span>.</span>com</a></p>
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<p>In the meantime, I’m happy to accept pull requests and cut releases as needed.
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If you want to contribute to the project, please do!</p>
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</div>
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<div class="section" id="purpose">
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<h2>Purpose<a class="headerlink" href="#purpose" title="Permalink to this headline">¶</a></h2>
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<p>pyst2 consists of a set of interfaces and libraries to allow programming of
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Asterisk from python. The library currently supports AGI, AMI, and the parsing
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of Asterisk configuration files. The library also includes debugging facilities
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for AGI.</p>
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<p>This project has been forked from pyst (<a class="reference external" href="http://sf.net/projects/pyst/">http://sf.net/projects/pyst/</a>) because
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it was impossible for me to contact the project maintainer (after several
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attempts), and I’d like to bring the project up-to-date, fix bugs, and make
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it more usable overall.</p>
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<p>My immediate plans include adding full documentation, re-writing some
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of the core routines, adding a test suite, and accepting pull requests.</p>
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<p>If you are one of the current maintainers, and would like to take over the
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fork, please contact me: <a class="reference external" href="mailto:r%40rdegges.com">r<span>@</span>rdegges<span>.</span>com</a>, so we can get that setup!</p>
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</div>
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<div class="section" id="installation">
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<h2>Installation<a class="headerlink" href="#installation" title="Permalink to this headline">¶</a></h2>
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<p>To install <code class="docutils literal"><span class="pre">pyst2</span></code>, simply run:</p>
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<div class="highlight-console"><div class="highlight"><pre><span></span><span class="gp">$</span> pip install pyst2
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</pre></div>
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</div>
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<p>This will install the latest version of the library automatically.</p>
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</div>
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<div class="section" id="documentation">
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<h2>Documentation<a class="headerlink" href="#documentation" title="Permalink to this headline">¶</a></h2>
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<p>Documentation is currently only in python docstrings, you can use
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pythons built-in help facility:</p>
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<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">asterisk</span>
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<span class="n">help</span> <span class="p">(</span><span class="n">asterisk</span><span class="p">)</span>
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<span class="kn">import</span> <span class="nn">asterisk.agi</span>
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<span class="n">help</span> <span class="p">(</span><span class="n">asterisk</span><span class="o">.</span><span class="n">agi</span><span class="p">)</span>
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<span class="kn">import</span> <span class="nn">asterisk.manager</span>
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<span class="n">help</span> <span class="p">(</span><span class="n">asterisk</span><span class="o">.</span><span class="n">manager</span><span class="p">)</span>
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<span class="kn">import</span> <span class="nn">asterisk.config</span>
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<span class="n">help</span> <span class="p">(</span><span class="n">asterisk</span><span class="o">.</span><span class="n">config</span><span class="p">)</span>
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</pre></div>
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</div>
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<p>Some notes on platforms: We now specify “platforms = ‘Any’” in
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<code class="docutils literal"><span class="pre">setup.py</span></code>. This means, the manager part of the package will probably
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run on any platform. The agi scripts on the other hand are called
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directly on the host where Asterisk is running. Since Asterisk doesn’t
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run on windows platforms (and probably never will) the agi part of the
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package can only be run on Asterisk platforms.</p>
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</div>
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<div class="section" id="fastagi">
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<h2>FastAGI<a class="headerlink" href="#fastagi" title="Permalink to this headline">¶</a></h2>
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<p>FastAGI support is a python based raw SocketServer, To start the server
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python fastagi.py should start it listening on localhost and the default
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asterisk FastAGI port. This does require the newest version of pyst2.
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The FastAGI server runs in as a Forked operation for each request, in
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an attempt to prevent blocking by a single bad service. As a result the
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FastAGI server may consume more memory then a single process. If you need
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to use a single process simply uncomment the appropriate line. Future versions
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of this will use a config file to set options.</p>
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</div>
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<div class="section" id="credits">
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<h2>Credits<a class="headerlink" href="#credits" title="Permalink to this headline">¶</a></h2>
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<p>Thanks to Karl Putland for writing the original package.</p>
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<p>Thanks to Matthew Nicholson for maintaining the package for some years
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and for handing over maintenance when he was no longer interested.</p>
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<p>Thanks to Randall Degges for maintaining this for and accepting
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pull requests.</p>
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</div>
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<div class="section" id="things-to-do-for-pyst">
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<h2>Things to do for pyst<a class="headerlink" href="#things-to-do-for-pyst" title="Permalink to this headline">¶</a></h2>
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<p>This is the original changelog merged into the readme file. I’m not so
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sure I really want to change all these things (in particular the
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threaded implementation looks good to me). I will maintain a section
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summarizing the changes in this README. Detailed changes will be
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available in the version control tool (currently git).</p>
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<ul>
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<li><p class="first">ChangeLog:
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The ChangeLog needs to be updated from the monotone logs.</p>
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</li>
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<li><p class="first">Documentation:
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All of pyst’s inline documentation needs to be updated.</p>
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</li>
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<li><p class="first">manager.py:
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This should be converted to be single threaded. Also there is a race
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condition when a user calls manager.logoff() followed by
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manager.close(). The close() function may still call logoff again if
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the socket thread has not yet cleared the _connected flag.</p>
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<p>A class should be made for each manager action rather than having a
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function in a manager class. The manager class should be adapted to
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have a send method that know the general format of the classes.</p>
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</li>
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</ul>
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<p>Matthew Nicholson writes on the mailinglist (note that I’m not sure I’ll do
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this, I’m currently satisfied with the threaded implementation):</p>
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<blockquote>
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<div><p>For pyst 0.3 I am planning to clean up the manager.py. There are
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several know issues with the code. No one has actually reported these
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as problems, but I have personally had trouble with these. Currently
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manager.py runs in several threads, the main program thread, a thread to
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read from the network, and an event distribution thread. This causes
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problems with non thread safe code such as the MySQLdb libraries. This
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design also causes problems when an event handler throws an exception
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that causes the event processing thread to terminate.</p>
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<p>The second problem is with the way actions are sent. Each action has a
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specific function associated with it in the manager object that takes
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all possible arguments that may ever be passed to that action. This
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makes the api somewhat rigid and the Manager object cluttered.</p>
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<p>To solve these problems I am basically going to copy the design of my
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Astxx manager library (written in c++) and make it more python like.
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Each action will be a different object with certain methods to handle
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various tasks, with one function in the actual Manager class to send the
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action. This will make the Manager class much smaller and much more
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flexible. The current code will be consolidated into a single threaded
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design with hooks to have the library process events and such. These
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hooks will be called from the host application’s main loop.</p>
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</div></blockquote>
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</div>
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</div>
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<h3><a href="index.html">Table Of Contents</a></h3>
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<ul>
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<li><a class="reference internal" href="#">pyst2: A Python Interface to Asterisk</a><ul>
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<li><a class="reference internal" href="#meta">Meta</a></li>
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<li><a class="reference internal" href="#purpose">Purpose</a></li>
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<li><a class="reference internal" href="#installation">Installation</a></li>
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<li><a class="reference internal" href="#documentation">Documentation</a></li>
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<li><a class="reference internal" href="#fastagi">FastAGI</a></li>
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<li><a class="reference internal" href="#credits">Credits</a></li>
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<li><a class="reference internal" href="#things-to-do-for-pyst">Things to do for pyst</a></li>
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<h3>Related Topics</h3>
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<li><a href="index.html">Documentation overview</a><ul>
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<li>Previous: <a href="index.html" title="previous chapter">Welcome to pyst2’s documentation!</a></li>
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<li>Next: <a href="agi.html" title="next chapter">AGI</a></li>
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