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<h2 class="title">Proxies with Apache and python</h2>
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<span class="meta date">2014-10-09</span>
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<p>This is a quick note on proxying a local python application (e.g. flask)
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to a subdirectory in Apache. This assumes that the file wsgi.py contains
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a WSGI application with the name <em>application</em>. Hence, wsgi:application.</p>
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<div class="section" id="gunicorn">
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<h2>Gunicorn</h2>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1
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2
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3
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4
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5</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="nt"><Location</span> <span class="s">/myapp/</span><span class="nt">></span>
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<span class="nb">ProxyPass</span> http://127.0.0.1:8888/myapp/
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<span class="nb">ProxyPassReverse</span> http://127.0.0.1:8888/myapp/
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<span class="nb">RequestHeader</span> set SCRIPT_NAME <span class="s2">"/myapp/"</span>
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<span class="nt"></Location></span>
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</pre></div>
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</td></tr></table><p><strong>Important</strong>: <em>SCRIPT_NAME</em> and the end of <em>ProxyPass</em> URL <strong>MUST BE
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THE SAME</strong>. Otherwise, Gunicorn will fail miserably.</p>
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<p>Try it with:</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="highlight"><pre><span></span>venv/bin/gunicorn -w <span class="m">4</span> -b 127.0.0.1:8888 --log-file - --access-logfile - wsgi:application
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</pre></div>
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</td></tr></table></div>
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<div class="section" id="uwsgi">
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<h2>UWSGI</h2>
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<p>This is a very simple configuration. I will try to upload one with more
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options for uwsgi (in a .ini file).</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1
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2
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3
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4</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="nt"><Location</span> <span class="s">/myapp/</span><span class="nt">></span>
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<span class="nb">SetHandler</span> uwsgi_handler
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<span class="nb">uWSGISocker</span> <span class="m">127.0.0.1</span>:8888
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<span class="nt"></Location></span>
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</pre></div>
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</td></tr></table><p>Try it with:</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre>1</pre></div></td><td class="code"><div class="highlight"><pre><span></span>uwsgi --socket 127.0.0.1:8888 -w wsgi:application
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</pre></div>
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</td></tr></table><div class="section" id="extra-supervisor">
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<h3>Extra: Supervisor</h3>
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<p>If everything went as expected, you can wrap your command in a
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supervisor config file and let it handle the server for you.</p>
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<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre> 1
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2
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3
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4
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5
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6
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7
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8
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9
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11
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13
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14
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15
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16
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17
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18
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19</pre></div></td><td class="code"><div class="highlight"><pre><span></span><span class="k">[unix_http_server]</span>
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<span class="na">file</span><span class="o">=</span><span class="s">/tmp/myapp.sock ; path to your socket file</span>
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<span class="k">[supervisord]</span>
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<span class="na">logfile</span> <span class="o">=</span> <span class="s">%(here)s/logs/supervisor.log</span>
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<span class="na">childlogdir</span> <span class="o">=</span> <span class="s">%(here)s/logs/</span>
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<span class="k">[rpcinterface:supervisor]</span>
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<span class="na">supervisor.rpcinterface_factory</span> <span class="o">=</span> <span class="s">supervisor.rpcinterface:make_main_rpcinterface</span>
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<span class="k">[supervisorctl]</span>
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<span class="na">logfile</span> <span class="o">=</span> <span class="s">%(here)s/logs/supervisorctl.log</span>
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<span class="na">serverurl</span><span class="o">=</span><span class="s">unix:///tmp/supervisor.sock ; use a unix:// URL for a unix socket</span>
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<span class="k">[program:myapp]</span>
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<span class="na">command</span> <span class="o">=</span> <span class="s">venv/bin/gunicorn -w 4 -b 0.0.0.0:5000 --log-file %(here)s/logs/gunicorn.log --access-logfile - wsgi:application</span>
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<span class="na">directory</span> <span class="o">=</span> <span class="s">%(here)s</span>
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<span class="na">environment</span> <span class="o">=</span> <span class="s">PATH=%(here)s/venv/bin/</span>
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<span class="na">logfile</span> <span class="o">=</span> <span class="s">%(here)s/logs/myapp.log</span>
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</pre></div>
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