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        <a href="paramiko-module.html">Package&nbsp;paramiko</a> ::
        Class&nbsp;SubsystemHandler
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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> --+    
             |    
        <a href="threading.Thread-class.html"><code>Thread</code></a> --+
                 |
                <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>&quot;mp3&quot;</code>, 
then whenever a client has successfully authenticated and requests 
subsytem <code>&quot;mp3&quot;</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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<tr bgcolor="#70b0f0" class="summary">
  <th colspan="2">Method Summary</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <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">&nbsp;</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">&nbsp;</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>
<tr><td align="right" valign="top" width="15%"><font size="-1">&nbsp;</font></td>
  <td><code><a name="_run"></a><span class="summary-sig"><span class="summary-sig-name">_run</span>(<span class=summary-sig-arg>self</span>)</span></code>
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<br />
helper for pickle</td></tr>
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helper for pickle</td></tr>
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  <th colspan="2">&nbsp;&nbsp;&nbsp;&nbsp;Inherited from Thread</th></tr>
<tr><td align="right" valign="top" width="15%"><font size="-1"><code>bool</code></font></td>
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  <th colspan="2">Method Details</th></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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (type=str)</i>
      <dd><code><b>server</b></code> -
         the server object for the session that started this 
        subsystem
        <br /><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (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>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        (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>
<br />


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