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<h1>Source code for django.middleware.security</h1><div class="highlight"><pre> <span></span><span class="kn">import</span> <span class="nn">re</span> <span class="kn">from</span> <span class="nn">django.conf</span> <span class="k">import</span> <span class="n">settings</span> <span class="kn">from</span> <span class="nn">django.http</span> <span class="k">import</span> <span class="n">HttpResponsePermanentRedirect</span> <div class="viewcode-block" id="SecurityMiddleware"><a class="viewcode-back" href="../../../ref/middleware.html#django.middleware.security.SecurityMiddleware">[docs]</a><span class="k">class</span> <span class="nc">SecurityMiddleware</span><span class="p">(</span><span class="nb">object</span><span class="p">):</span> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span> <span class="bp">self</span><span class="o">.</span><span class="n">sts_seconds</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_HSTS_SECONDS</span> <span class="bp">self</span><span class="o">.</span><span class="n">sts_include_subdomains</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_HSTS_INCLUDE_SUBDOMAINS</span> <span class="bp">self</span><span class="o">.</span><span class="n">content_type_nosniff</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_CONTENT_TYPE_NOSNIFF</span> <span class="bp">self</span><span class="o">.</span><span class="n">xss_filter</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_BROWSER_XSS_FILTER</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_SSL_REDIRECT</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_host</span> <span class="o">=</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_SSL_HOST</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_exempt</span> <span class="o">=</span> <span class="p">[</span><span class="n">re</span><span class="o">.</span><span class="n">compile</span><span class="p">(</span><span class="n">r</span><span class="p">)</span> <span class="k">for</span> <span class="n">r</span> <span class="ow">in</span> <span class="n">settings</span><span class="o">.</span><span class="n">SECURE_REDIRECT_EXEMPT</span><span class="p">]</span> <span class="k">def</span> <span class="nf">process_request</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">):</span> <span class="n">path</span> <span class="o">=</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">lstrip</span><span class="p">(</span><span class="s2">"/"</span><span class="p">)</span> <span class="k">if</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">redirect</span> <span class="ow">and</span> <span class="ow">not</span> <span class="n">request</span><span class="o">.</span><span class="n">is_secure</span><span class="p">()</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">any</span><span class="p">(</span><span class="n">pattern</span><span class="o">.</span><span class="n">search</span><span class="p">(</span><span class="n">path</span><span class="p">)</span> <span class="k">for</span> <span class="n">pattern</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_exempt</span><span class="p">)):</span> <span class="n">host</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">redirect_host</span> <span class="ow">or</span> <span class="n">request</span><span class="o">.</span><span class="n">get_host</span><span class="p">()</span> <span class="k">return</span> <span class="n">HttpResponsePermanentRedirect</span><span class="p">(</span> <span class="s2">"https://</span><span class="si">%s%s</span><span class="s2">"</span> <span class="o">%</span> <span class="p">(</span><span class="n">host</span><span class="p">,</span> <span class="n">request</span><span class="o">.</span><span class="n">get_full_path</span><span class="p">())</span> <span class="p">)</span> <span class="k">def</span> <span class="nf">process_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">response</span><span class="p">):</span> <span class="k">if</span> <span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">sts_seconds</span> <span class="ow">and</span> <span class="n">request</span><span class="o">.</span><span class="n">is_secure</span><span class="p">()</span> <span class="ow">and</span> <span class="s1">'strict-transport-security'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">response</span><span class="p">):</span> <span class="n">sts_header</span> <span class="o">=</span> <span class="s2">"max-age=</span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">sts_seconds</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">sts_include_subdomains</span><span class="p">:</span> <span class="n">sts_header</span> <span class="o">=</span> <span class="n">sts_header</span> <span class="o">+</span> <span class="s2">"; includeSubDomains"</span> <span class="n">response</span><span class="p">[</span><span class="s2">"strict-transport-security"</span><span class="p">]</span> <span class="o">=</span> <span class="n">sts_header</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">content_type_nosniff</span> <span class="ow">and</span> <span class="s1">'x-content-type-options'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">response</span><span class="p">:</span> <span class="n">response</span><span class="p">[</span><span class="s2">"x-content-type-options"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"nosniff"</span> <span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">xss_filter</span> <span class="ow">and</span> <span class="s1">'x-xss-protection'</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">response</span><span class="p">:</span> <span class="n">response</span><span class="p">[</span><span class="s2">"x-xss-protection"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"1; mode=block"</span> <span class="k">return</span> <span class="n">response</span></div> </pre></div> </div> </div> </div> <div class="yui-b" id="sidebar"> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3>Browse</h3> <ul> </ul> <h3>You are here:</h3> <ul> <li> <a href="../../../index.html">Django 1.8.19 documentation</a> <ul><li><a href="../../index.html">Module code</a> <ul><li><a href="../../django.html">django</a> <ul><li>django.middleware.security</li></ul> </li></ul></li></ul> </li> </ul> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../../../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" 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