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<h1>Source code for pylorax.api.checkparams</h1><div class="highlight"><pre>
<span></span><span class="c1">#</span>
<span class="c1"># Copyright (C) 2018 Red Hat, Inc.</span>
<span class="c1">#</span>
<span class="c1"># This program is free software; you can redistribute it and/or modify</span>
<span class="c1"># it under the terms of the GNU General Public License as published by</span>
<span class="c1"># the Free Software Foundation; either version 2 of the License, or</span>
<span class="c1"># (at your option) any later version.</span>
<span class="c1">#</span>
<span class="c1"># This program is distributed in the hope that it will be useful,</span>
<span class="c1"># but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="c1"># MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span class="c1"># GNU General Public License for more details.</span>
<span class="c1">#</span>
<span class="c1"># You should have received a copy of the GNU General Public License</span>
<span class="c1"># along with this program. If not, see <http://www.gnu.org/licenses/>.</span>
<span class="c1">#</span>
<span class="kn">import</span> <span class="nn">logging</span>
<span class="n">log</span> <span class="o">=</span> <span class="n">logging</span><span class="o">.</span><span class="n">getLogger</span><span class="p">(</span><span class="s2">"lorax-composer"</span><span class="p">)</span>
<span class="kn">from</span> <span class="nn">flask</span> <span class="k">import</span> <span class="n">jsonify</span>
<span class="kn">from</span> <span class="nn">functools</span> <span class="k">import</span> <span class="n">update_wrapper</span>
<span class="c1"># A decorator for checking the parameters provided to the API route implementing</span>
<span class="c1"># functions. The tuples parameter is a list of tuples. Each tuple is the string</span>
<span class="c1"># name of a parameter ("blueprint_name", not blueprint_name), the value it's set</span>
<span class="c1"># to by flask if the caller did not provide it, and a message to be returned to</span>
<span class="c1"># the user.</span>
<span class="c1">#</span>
<span class="c1"># If the parameter is set to its default, the error message is returned. Otherwise,</span>
<span class="c1"># the decorated function is called and its return value is returned.</span>
<div class="viewcode-block" id="checkparams"><a class="viewcode-back" href="../../../pylorax.api.html#pylorax.api.checkparams.checkparams">[docs]</a><span class="k">def</span> <span class="nf">checkparams</span><span class="p">(</span><span class="n">tuples</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">decorator</span><span class="p">(</span><span class="n">f</span><span class="p">):</span>
<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>
<span class="k">for</span> <span class="n">tup</span> <span class="ow">in</span> <span class="n">tuples</span><span class="p">:</span>
<span class="k">if</span> <span class="n">kwargs</span><span class="p">[</span><span class="n">tup</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span> <span class="o">==</span> <span class="n">tup</span><span class="p">[</span><span class="mi">1</span><span class="p">]:</span>
<span class="n">log</span><span class="o">.</span><span class="n">error</span><span class="p">(</span><span class="s2">"(</span><span class="si">%s</span><span class="s2">) </span><span class="si">%s</span><span class="s2">"</span><span class="p">,</span> <span class="n">f</span><span class="o">.</span><span class="vm">__name__</span><span class="p">,</span> <span class="n">tup</span><span class="p">[</span><span class="mi">2</span><span class="p">])</span>
<span class="k">return</span> <span class="n">jsonify</span><span class="p">(</span><span class="n">status</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">errors</span><span class="o">=</span><span class="p">[</span><span class="n">tup</span><span class="p">[</span><span class="mi">2</span><span class="p">]]),</span> <span class="mi">400</span>
<span class="k">return</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>
<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>
<span class="k">return</span> <span class="n">decorator</span></div>
</pre></div>
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