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  <div class="section" id="wsgirestrictstdin">
<h1>WSGIRestrictStdin<a class="headerlink" href="#wsgirestrictstdin" title="Permalink to this headline">¶</a></h1>
<table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field-odd field"><th class="field-name">Description:</th><td class="field-body">Enable restrictions on use of STDIN.</td>
</tr>
<tr class="field-even field"><th class="field-name">Syntax:</th><td class="field-body"><tt class="docutils literal"><span class="pre">WSGIRestrictStdin</span> <span class="pre">On|Off</span></tt></td>
</tr>
<tr class="field-odd field"><th class="field-name">Default:</th><td class="field-body"><tt class="docutils literal"><span class="pre">WSGIRestrictStdin</span> <span class="pre">On</span></tt></td>
</tr>
<tr class="field-even field"><th class="field-name">Context:</th><td class="field-body">server config</td>
</tr>
</tbody>
</table>
<p>A well behaved Python WSGI application should never attempt to read any
input directly from <tt class="docutils literal"><span class="pre">sys.stdin</span></tt>. This is because ways of hosting WSGI
applications such as CGI use standard input as the mechanism for receiving
the content of a request from the web server. If a WSGI application were to
directly read from <tt class="docutils literal"><span class="pre">sys.stdin</span></tt> it could interfere with the operation of
the WSGI adapter and result in corruption of the input stream.</p>
<p>In the interests of promoting portability of WSGI applications, mod_wsgi
restricts access to <tt class="docutils literal"><span class="pre">sys.stdin</span></tt> and will raise an exception if an
attempt is made to use <tt class="docutils literal"><span class="pre">sys.stdin</span></tt> explicitly.</p>
<p>The only time that one might want to remove this restriction is if the Apache
web server is being run in debug or single process mode for the purposes of
being able to run an interactive Python debugger such as <tt class="docutils literal"><span class="pre">pdb</span></tt>.</p>
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