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  <div class="section" id="version-4-5-21">
<h1>Version 4.5.21<a class="headerlink" href="#version-4-5-21" title="Permalink to this headline">¶</a></h1>
<p>Version 4.5.21 of mod_wsgi can be obtained from:</p>
<blockquote>
<div><a class="reference external" href="https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.21">https://codeload.github.com/GrahamDumpleton/mod_wsgi/tar.gz/4.5.21</a></div></blockquote>
<div class="section" id="bugs-fixed">
<h2>Bugs Fixed<a class="headerlink" href="#bugs-fixed" title="Permalink to this headline">¶</a></h2>
<ul>
<li><p class="first">Installation using <tt class="docutils literal"><span class="pre">pip</span></tt> or <tt class="docutils literal"><span class="pre">setup.py</span></tt> install was failing on
MacOS X High Sierra with latest Xcode as Apple doesn&#8217;t even include
the <tt class="docutils literal"><span class="pre">apxs</span></tt> program at all.</p>
<p>Note you still cannot use the configure/make/make install method of
deploying mod_wsgi to MacOS X. You need to use the <tt class="docutils literal"><span class="pre">pip</span> <span class="pre">install</span></tt>
method.</p>
</li>
<li><p class="first">Speculated that crashes on daemon process shutdown were being caused
by a race condition around accessing Python C API when interpreter
was being destroyed. There was a check in place to avoid this but may
not have been robust enough depending on how memory cache worked
for threads running across multi core machine. Now use a dedicated
thread mutex to avoid race condition between main process thread and
Python interpreter deadlock detection thread.</p>
</li>
</ul>
</div>
<div class="section" id="features-changed">
<h2>Features Changed<a class="headerlink" href="#features-changed" title="Permalink to this headline">¶</a></h2>
<ul>
<li><p class="first">Set <tt class="docutils literal"><span class="pre">wsgi.input_terminated</span></tt> to <tt class="docutils literal"><span class="pre">True</span></tt> in WSGI environment. This is a
unofficial extension to WSGI specification proposed by Armin Ronacher
for a WSGI server/middleware to flag that it is safe to read to the
end of input and that <tt class="docutils literal"><span class="pre">CONTENT_LENGTH</span></tt> can be ignored. This is to be
able to support chunked request content, but also anything which
mutates the request content length but which can&#8217;t easily change the
<tt class="docutils literal"><span class="pre">CONTENT_LENGTH</span></tt>, such as occurs when request content is compressed
and is decompressed by the Apache web server.</p>
<p>The ability to safely read until end of input was always present in
mod_wsgi, but there was no way in the WSGI specification for a WSGI
server to tell a WSGI application this was the case. Prior attempts to
include something to deal with this in the WSGI specification when it
was updated in PEP 3333 were ignored. This is why now an unofficial way
of doing it is being adopted by WSGI servers separate to the WSGI
specification.</p>
</li>
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