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<?xml version="1.0" encoding="iso-8859-1"?>
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<font size="-1"><b class="breadcrumbs">
<a href="paramiko-module.html">Package paramiko</a> ::
Class SubsystemHandler
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<td><table cellpadding="0" cellspacing="0">
<tr><td align="right"><font size="-2">[<a href="../private/paramiko.SubsystemHandler-class.html">show private</a> | hide private]</font></td></tr>
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<!-- =========== START OF CLASS DESCRIPTION =========== -->
<h2 class="class">Type SubsystemHandler</h2>
<pre class="base-tree">
<a href="__builtin__.object-class.html"><code>object</code></a> --+
|
<a href="../private/threading._Verbose-class.html"><code>_Verbose</code></a> --+
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<a href="threading.Thread-class.html"><code>Thread</code></a> --+
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<b>SubsystemHandler</b>
</pre><br />
<dl><dt><b>Known Subclasses:</b></dt>
<dd>
<a href="paramiko.SFTPServer-class.html"><code>SFTPServer</code></a></dd></dl>
<hr/>
<p>Handler for a subsytem in server mode. If you create a subclass of
this class and pass it to <a
href="paramiko.Transport-class.html#set_subsystem_handler"
class="link"><code>Transport.set_subsystem_handler</code></a>, an object
of this class will be created for each request for this subsystem. Each
new object will be executed within its own new thread by calling <a
href="paramiko.SubsystemHandler-class.html#start_subsystem"
class="link"><code>start_subsystem</code></a>. When that method
completes, the channel is closed.</p>
For example, if you made a subclass <code>MP3Handler</code> and
registered it as the handler for subsystem <code>"mp3"</code>,
then whenever a client has successfully authenticated and requests
subsytem <code>"mp3"</code>, an object of class
<code>MP3Handler</code> will be created, and <a
href="paramiko.SubsystemHandler-class.html#start_subsystem"
class="link"><code>start_subsystem</code></a> will be called on it from a
new thread.
<hr/>
<p><b>Since:</b> ivysaur
</p>
<!-- =========== START OF METHOD SUMMARY =========== -->
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<th colspan="2">Method Summary</th></tr>
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<td><code><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#__init__" class="summary-sig-name"><code>__init__</code></a>(<span class=summary-sig-arg>self</span>,
<span class=summary-sig-arg>channel</span>,
<span class=summary-sig-arg>name</span>,
<span class=summary-sig-arg>server</span>)</span></code>
<br />
Create a new handler for a channel.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#finish_subsystem" class="summary-sig-name"><code>finish_subsystem</code></a>(<span class=summary-sig-arg>self</span>)</span></code>
<br />
Perform any cleanup at the end of a subsystem.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> <a href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a>
</font></td>
<td><code><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#get_server" class="summary-sig-name"><code>get_server</code></a>(<span class=summary-sig-arg>self</span>)</span></code>
<br />
Return the <a href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a> object associated with this
channel and subsystem.</td></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"> </font></td>
<td><code><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#start_subsystem" class="summary-sig-name"><code>start_subsystem</code></a>(<span class=summary-sig-arg>self</span>,
<span class=summary-sig-arg>name</span>,
<span class=summary-sig-arg>transport</span>,
<span class=summary-sig-arg>channel</span>)</span></code>
<br />
Process an ssh subsystem in server mode.</td></tr>
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<th colspan="2"> Inherited from Thread</th></tr>
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helper for pickle</td></tr>
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helper for pickle</td></tr>
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<a name="__init__"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
<h3><span class="sig"><span class="sig-name">__init__</span>(<span class=sig-arg>self</span>,
<span class=sig-arg>channel</span>,
<span class=sig-arg>name</span>,
<span class=sig-arg>server</span>)</span>
<br /><i>(Constructor)</i>
</h3>
Create a new handler for a channel. This is used by <a
href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a> to start up a new handler
when a channel requests this subsystem. You don't need to override this
method, but if you do, be sure to pass the <code>channel</code> and
<code>name</code> parameters through to the original
<code>__init__</code> method here.
<dl><dt></dt><dd>
<dl><dt><b>Parameters:</b></dt>
<dd><code><b>channel</b></code> -
the channel associated with this subsystem request.
<br /><i>
(type=<a href="paramiko.Channel-class.html"
class="link"><code>Channel</code></a>)</i>
<dd><code><b>name</b></code> -
name of the requested subsystem.
<br /><i>
(type=str)</i>
<dd><code><b>server</b></code> -
the server object for the session that started this
subsystem
<br /><i>
(type=<a href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a>)</i>
</dd>
</dl>
<dl><dt><b>Overrides:</b></dt>
<dd><a href="threading.Thread-class.html#__init__"><code>threading.Thread.__init__</code></a></dd>
</dl>
</dd></dl>
</td></tr></table>
<a name="finish_subsystem"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
<h3><span class="sig"><span class="sig-name">finish_subsystem</span>(<span class=sig-arg>self</span>)</span>
</h3>
Perform any cleanup at the end of a subsystem. The default
implementation just closes the channel.
<dl><dt></dt><dd>
<p><b>Since:</b> 1.1
</p>
</dd></dl>
</td></tr></table>
<a name="get_server"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
<h3><span class="sig"><span class="sig-name">get_server</span>(<span class=sig-arg>self</span>)</span>
</h3>
Return the <a href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a> object associated with
this channel and subsystem.
<dl><dt></dt><dd>
<dl><dt><b>Returns:</b></dt>
<dd>
<a href="../private/paramiko.ServerInterface-class.html"
class="link"><code>ServerInterface</code></a>
</dd>
</dl>
</dd></dl>
</td></tr></table>
<a name="start_subsystem"></a>
<table width="100%" class="func-details" bgcolor="#e0e0e0"><tr><td>
<h3><span class="sig"><span class="sig-name">start_subsystem</span>(<span class=sig-arg>self</span>,
<span class=sig-arg>name</span>,
<span class=sig-arg>transport</span>,
<span class=sig-arg>channel</span>)</span>
</h3>
<p>Process an ssh subsystem in server mode. This method is called on a
new object (and in a new thread) for each subsystem request. It is
assumed that all subsystem logic will take place here, and when the
subsystem is finished, this method will return. After this method
returns, the channel is closed.</p>
The combination of <code>transport</code> and <code>channel</code>
are unique; this handler corresponds to exactly one <a
href="paramiko.Channel-class.html"
class="link"><code>Channel</code></a> on one <a
href="paramiko.Transport-class.html"
class="link"><code>Transport</code></a>.
<dl><dt></dt><dd>
<dl><dt><b>Parameters:</b></dt>
<dd><code><b>name</b></code> -
name of the requested subsystem.
<br /><i>
(type=str)</i>
<dd><code><b>transport</b></code> -
the server-mode <a href="paramiko.Transport-class.html"
class="link"><code>Transport</code></a>.
<br /><i>
(type=<a href="paramiko.Transport-class.html"
class="link"><code>Transport</code></a>)</i>
<dd><code><b>channel</b></code> -
the channel associated with this subsystem request.
<br /><i>
(type=<a href="paramiko.Channel-class.html"
class="link"><code>Channel</code></a>)</i>
</dd>
</dl>
<p><b>Note:</b> It is the responsibility of this method to exit if the underlying <a
href="paramiko.Transport-class.html"
class="link"><code>Transport</code></a> is closed. This can be done by
checking <a href="paramiko.Transport-class.html#is_active"
class="link"><code>Transport.is_active</code></a> or noticing an EOF on
the <a href="paramiko.Channel-class.html"
class="link"><code>Channel</code></a>. If this method loops forever
without checking for this case, your python interpreter may refuse to
exit because this thread will still be running.
</p>
</dd></dl>
</td></tr></table>
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