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<?xml version="1.0" encoding="ascii"?>
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        <a href="paramiko-module.html">Package&nbsp;paramiko</a> ::
        Class&nbsp;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&nbsp;code</a></span></p>
<pre class="base-tree">
        object --+        
                 |        
threading._Verbose --+    
                     |    
      threading.Thread --+
                         |
                        <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>&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">start_subsystem</a> will be called on it from a new 
  thread.</p>

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      <span class="summary-type">&nbsp;</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&nbsp;code</a></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&nbsp;code</a></span>
            
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      <span class="summary-type"><a href="paramiko.ServerInterface-class.html" 
      class="link">ServerInterface</a></span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <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&nbsp;code</a></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&nbsp;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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      <code>daemon</code>,
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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&nbsp;code</a></span>&nbsp;
    </td>
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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">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <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&nbsp;code</a></span>&nbsp;
    </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>
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       cellspacing="0" width="100%" bgcolor="white">
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  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <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&nbsp;code</a></span>&nbsp;
    </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>
</div></td></tr></table>
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