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<a href="paramiko-module.html">Package paramiko</a> ::
Class SubsystemHandler
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class SubsystemHandler</h1><p class="nomargin-top"><span class="codelink"><a href="paramiko-pysrc.html#SubsystemHandler">source code</a></span></p>
<pre class="base-tree">
object --+
|
threading._Verbose --+
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threading.Thread --+
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<strong class="uidshort">SubsystemHandler</strong>
</pre>
<dl><dt>Known Subclasses:</dt>
<dd>
<ul class="subclass-list">
<li><a href="paramiko.SFTPServer-class.html">SFTPServer</a></li> </ul>
</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">Transport.set_subsystem_handler</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">start_subsystem</a>. When that method completes, the channel
is closed.</p>
<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">start_subsystem</a> will be called on it from a new
thread.</p>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#__init__" class="summary-sig-name">__init__</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><br />
Create a new handler for a channel.</td>
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<span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#finish_subsystem" class="summary-sig-name">finish_subsystem</a>(<span class="summary-sig-arg">self</span>)</span><br />
Perform any cleanup at the end of a subsystem.</td>
<td align="right" valign="top">
<span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
</td>
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<td width="15%" align="right" valign="top" class="summary">
<span class="summary-type"><a href="paramiko.ServerInterface-class.html"
class="link">ServerInterface</a></span>
</td><td class="summary">
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<td><span class="summary-sig"><a name="get_server"></a><span class="summary-sig-name">get_server</span>(<span class="summary-sig-arg">self</span>)</span><br />
Return the <a href="paramiko.ServerInterface-class.html"
class="link">ServerInterface</a> object associated with this channel
and subsystem.</td>
<td align="right" valign="top">
<span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
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<span class="summary-type"> </span>
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<td><span class="summary-sig"><a href="paramiko.SubsystemHandler-class.html#start_subsystem" class="summary-sig-name">start_subsystem</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><br />
Process an ssh subsystem in server mode.</td>
<td align="right" valign="top">
<span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
</td>
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<p class="indent-wrapped-lines"><b>Inherited from <code>threading.Thread</code></b>:
<code>__repr__</code>,
<code>getName</code>,
<code>isAlive</code>,
<code>isDaemon</code>,
<code>is_alive</code>,
<code>join</code>,
<code>run</code>,
<code>setDaemon</code>,
<code>setName</code>,
<code>start</code>
</p>
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__delattr__</code>,
<code>__format__</code>,
<code>__getattribute__</code>,
<code>__hash__</code>,
<code>__new__</code>,
<code>__reduce__</code>,
<code>__reduce_ex__</code>,
<code>__setattr__</code>,
<code>__sizeof__</code>,
<code>__str__</code>,
<code>__subclasshook__</code>
</p>
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<p class="indent-wrapped-lines"><b>Inherited from <code>threading.Thread</code></b>:
<code>daemon</code>,
<code>ident</code>,
<code>name</code>
</p>
<p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
<code>__class__</code>
</p>
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<a name="__init__"></a>
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<h3 class="epydoc"><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 /><em class="fname">(Constructor)</em>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
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<p>Create a new handler for a channel. This is used by <a
href="paramiko.ServerInterface-class.html"
class="link">ServerInterface</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.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>channel</code></strong> (<a href="paramiko.Channel-class.html" class="link">Channel</a>) - the channel associated with this subsystem request.</li>
<li><strong class="pname"><code>name</code></strong> (str) - name of the requested subsystem.</li>
<li><strong class="pname"><code>server</code></strong> (<a href="paramiko.ServerInterface-class.html"
class="link">ServerInterface</a>) - the server object for the session that started this subsystem</li>
</ul></dd>
<dt>Overrides:
object.__init__
</dt>
</dl>
</td></tr></table>
</div>
<a name="finish_subsystem"></a>
<div>
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cellspacing="0" width="100%" bgcolor="white">
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<h3 class="epydoc"><span class="sig"><span class="sig-name">finish_subsystem</span>(<span class="sig-arg">self</span>)</span>
</h3>
</td><td align="right" valign="top"
><span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
</td>
</tr></table>
<p>Perform any cleanup at the end of a subsystem. The default
implementation just closes the channel.</p>
<dl class="fields">
</dl>
<div class="fields"> <p><strong>Since:</strong>
1.1
</p>
</div></td></tr></table>
</div>
<a name="start_subsystem"></a>
<div>
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cellspacing="0" width="100%" bgcolor="white">
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<h3 class="epydoc"><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>
</td><td align="right" valign="top"
><span class="codelink"><a href="paramiko.server-pysrc.html">source code</a></span>
</td>
</tr></table>
<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>
<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">Channel</a> on one <a
href="paramiko.Transport-class.html" class="link">Transport</a>.</p>
<dl class="fields">
<dt>Parameters:</dt>
<dd><ul class="nomargin-top">
<li><strong class="pname"><code>name</code></strong> (str) - name of the requested subsystem.</li>
<li><strong class="pname"><code>transport</code></strong> (<a href="paramiko.Transport-class.html"
class="link">Transport</a>) - the server-mode <a href="paramiko.Transport-class.html"
class="link">Transport</a>.</li>
<li><strong class="pname"><code>channel</code></strong> (<a href="paramiko.Channel-class.html" class="link">Channel</a>) - the channel associated with this subsystem request.</li>
</ul></dd>
</dl>
<div class="fields"> <p><strong>Note:</strong>
It is the responsibility of this method to exit if the underlying
<a href="paramiko.Transport-class.html" class="link">Transport</a>
is closed. This can be done by checking <a
href="paramiko.Transport-class.html#is_active"
class="link">Transport.is_active</a> or noticing an EOF on the <a
href="paramiko.Channel-class.html" class="link">Channel</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>
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