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<h1>Source code for pylorax.api.crossdomain</h1><div class="highlight"><pre>
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<span></span><span class="c1">#</span>
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<span class="c1"># Copyright (C) 2017 Red Hat, Inc.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is free software; you can redistribute it and/or modify</span>
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<span class="c1"># it under the terms of the GNU General Public License as published by</span>
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<span class="c1"># the Free Software Foundation; either version 2 of the License, or</span>
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<span class="c1"># (at your option) any later version.</span>
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<span class="c1">#</span>
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<span class="c1"># This program is distributed in the hope that it will be useful,</span>
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<span class="c1"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
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<span class="c1"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
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<span class="c1"># GNU General Public License for more details.</span>
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<span class="c1">#</span>
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<span class="c1"># You should have received a copy of the GNU General Public License</span>
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<span class="c1"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
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<span class="c1">#</span>
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<span class="c1"># crossdomain decorator from - http://flask.pocoo.org/snippets/56/</span>
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<span class="kn">from</span> <span class="nn">datetime</span> <span class="k">import</span> <span class="n">timedelta</span>
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<span class="kn">from</span> <span class="nn">flask</span> <span class="k">import</span> <span class="n">make_response</span><span class="p">,</span> <span class="n">request</span><span class="p">,</span> <span class="n">current_app</span>
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<span class="kn">from</span> <span class="nn">functools</span> <span class="k">import</span> <span class="n">update_wrapper</span>
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<div class="viewcode-block" id="crossdomain"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.crossdomain.crossdomain">[docs]</a><span class="k">def</span> <span class="nf">crossdomain</span><span class="p">(</span><span class="n">origin</span><span class="p">,</span> <span class="n">methods</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span>
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<span class="n">max_age</span><span class="o">=</span><span class="mi">21600</span><span class="p">,</span> <span class="n">attach_to_all</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
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<span class="n">automatic_options</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">methods</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
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<span class="n">methods</span> <span class="o">=</span> <span class="s1">', '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="nb">sorted</span><span class="p">(</span><span class="n">x</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">methods</span><span class="p">))</span>
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<span class="k">if</span> <span class="n">headers</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">headers</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span>
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<span class="n">headers</span> <span class="o">=</span> <span class="s1">', '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">x</span><span class="o">.</span><span class="n">upper</span><span class="p">()</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="n">headers</span><span class="p">)</span>
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<span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">origin</span><span class="p">,</span> <span class="nb">list</span><span class="p">):</span>
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<span class="n">origin</span> <span class="o">=</span> <span class="p">[</span><span class="n">origin</span><span class="p">]</span>
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<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">max_age</span><span class="p">,</span> <span class="n">timedelta</span><span class="p">):</span>
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<span class="n">max_age</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">max_age</span><span class="o">.</span><span class="n">total_seconds</span><span class="p">())</span>
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<span class="k">def</span> <span class="nf">get_methods</span><span class="p">():</span>
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<span class="k">if</span> <span class="n">methods</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
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<span class="k">return</span> <span class="n">methods</span>
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<span class="n">options_resp</span> <span class="o">=</span> <span class="n">current_app</span><span class="o">.</span><span class="n">make_default_options_response</span><span class="p">()</span>
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<span class="k">return</span> <span class="n">options_resp</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="s1">'allow'</span><span class="p">]</span>
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<span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
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<span class="k">def</span> <span class="nf">wrapped_function</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">automatic_options</span> <span class="ow">and</span> <span class="n">request</span><span class="o">.</span><span class="n">method</span> <span class="o">==</span> <span class="s1">'OPTIONS'</span><span class="p">:</span>
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<span class="n">resp</span> <span class="o">=</span> <span class="n">current_app</span><span class="o">.</span><span class="n">make_default_options_response</span><span class="p">()</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="n">resp</span> <span class="o">=</span> <span class="n">make_response</span><span class="p">(</span><span class="n">f</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">))</span>
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<span class="k">if</span> <span class="ow">not</span> <span class="n">attach_to_all</span> <span class="ow">and</span> <span class="n">request</span><span class="o">.</span><span class="n">method</span> <span class="o">!=</span> <span class="s1">'OPTIONS'</span><span class="p">:</span>
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<span class="k">return</span> <span class="n">resp</span>
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<span class="n">h</span> <span class="o">=</span> <span class="n">resp</span><span class="o">.</span><span class="n">headers</span>
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<span class="n">h</span><span class="o">.</span><span class="n">extend</span><span class="p">([(</span><span class="s2">"Access-Control-Allow-Origin"</span><span class="p">,</span> <span class="n">orig</span><span class="p">)</span> <span class="k">for</span> <span class="n">orig</span> <span class="ow">in</span> <span class="n">origin</span><span class="p">])</span>
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<span class="n">h</span><span class="p">[</span><span class="s1">'Access-Control-Allow-Methods'</span><span class="p">]</span> <span class="o">=</span> <span class="n">get_methods</span><span class="p">()</span>
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<span class="n">h</span><span class="p">[</span><span class="s1">'Access-Control-Max-Age'</span><span class="p">]</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">max_age</span><span class="p">)</span>
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<span class="k">if</span> <span class="n">headers</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
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<span class="n">h</span><span class="p">[</span><span class="s1">'Access-Control-Allow-Headers'</span><span class="p">]</span> <span class="o">=</span> <span class="n">headers</span>
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<span class="k">return</span> <span class="n">resp</span>
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<span class="n">f</span><span class="o">.</span><span class="n">provide_automatic_options</span> <span class="o">=</span> <span class="kc">False</span>
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<span class="n">f</span><span class="o">.</span><span class="n">required_methods</span> <span class="o">=</span> <span class="p">[</span><span class="s1">'OPTIONS'</span><span class="p">]</span>
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<span class="k">return</span> <span class="n">update_wrapper</span><span class="p">(</span><span class="n">wrapped_function</span><span class="p">,</span> <span class="n">f</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">decorator</span></div>
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</pre></div>
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