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<h1>Source code for pylorax.api.flask_blueprint</h1><div class="highlight"><pre>
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<span></span><span class="c1">#</span>
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<span class="c1"># Copyright (C) 2019 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="sd">""" Flask Blueprints that support skipping routes</span>
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<span class="sd">When using Blueprints for API versioning you will usually want to fall back</span>
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<span class="sd">to the previous version's rules for routes that have no new behavior. To do</span>
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<span class="sd">this we add a 'skip_rule' list to the Blueprint's options dictionary. It lists</span>
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<span class="sd">all of the routes that you do not want to register.</span>
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<span class="sd">For example:</span>
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<span class="sd"> from pylorax.api.v0 import v0</span>
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<span class="sd"> from pylorax.api.v1 import v1</span>
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<span class="sd"> server.register_blueprint(v0, url_prefix="/api/v0/")</span>
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<span class="sd"> server.register_blueprint(v0, url_prefix="/api/v1/", skip_rules=["/blueprints/list"]</span>
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<span class="sd"> server.register_blueprint(v1, url_prefix="/api/v1/")</span>
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<span class="sd">This will register all of v0's routes under `/api/v0`, and all but `/blueprints/list` under /api/v1,</span>
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<span class="sd">and then register v1's version of `/blueprints/list` under `/api/v1`</span>
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<span class="sd">"""</span>
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<span class="kn">from</span> <span class="nn">flask</span> <span class="kn">import</span> <span class="n">Blueprint</span>
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<span class="kn">from</span> <span class="nn">flask.blueprints</span> <span class="kn">import</span> <span class="n">BlueprintSetupState</span>
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<div class="viewcode-block" id="BlueprintSetupStateSkip"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.flask_blueprint.BlueprintSetupStateSkip">[docs]</a><span class="k">class</span> <span class="nc">BlueprintSetupStateSkip</span><span class="p">(</span><span class="n">BlueprintSetupState</span><span class="p">):</span>
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<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">blueprint</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">,</span> <span class="n">skip_rules</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">_skip_rules</span> <span class="o">=</span> <span class="n">skip_rules</span>
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<span class="nb">super</span><span class="p">(</span><span class="n">BlueprintSetupStateSkip</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="n">blueprint</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">)</span>
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<div class="viewcode-block" id="BlueprintSetupStateSkip.add_url_rule"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.flask_blueprint.BlueprintSetupStateSkip.add_url_rule">[docs]</a> <span class="k">def</span> <span class="nf">add_url_rule</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">view_func</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">):</span>
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<span class="k">if</span> <span class="n">rule</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_skip_rules</span><span class="p">:</span>
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<span class="nb">super</span><span class="p">(</span><span class="n">BlueprintSetupStateSkip</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="n">add_url_rule</span><span class="p">(</span><span class="n">rule</span><span class="p">,</span> <span class="n">endpoint</span><span class="p">,</span> <span class="n">view_func</span><span class="p">,</span> <span class="o">**</span><span class="n">options</span><span class="p">)</span></div></div>
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<div class="viewcode-block" id="BlueprintSkip"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.flask_blueprint.BlueprintSkip">[docs]</a><span class="k">class</span> <span class="nc">BlueprintSkip</span><span class="p">(</span><span class="n">Blueprint</span><span class="p">):</span>
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<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</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="nb">super</span><span class="p">(</span><span class="n">BlueprintSkip</span><span class="p">,</span> <span class="bp">self</span><span class="p">)</span><span class="o">.</span><span class="fm">__init__</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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<div class="viewcode-block" id="BlueprintSkip.make_setup_state"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.flask_blueprint.BlueprintSkip.make_setup_state">[docs]</a> <span class="k">def</span> <span class="nf">make_setup_state</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="o">=</span><span class="kc">False</span><span class="p">):</span>
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<span class="n">skip_rules</span> <span class="o">=</span> <span class="n">options</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="s2">"skip_rules"</span><span class="p">,</span> <span class="p">[])</span>
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<span class="k">return</span> <span class="n">BlueprintSetupStateSkip</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">app</span><span class="p">,</span> <span class="n">options</span><span class="p">,</span> <span class="n">first_registration</span><span class="p">,</span> <span class="n">skip_rules</span><span class="p">)</span></div></div>
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</pre></div>
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