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<h1>Source code for jsonrpc.jsonutil</h1><div class="highlight"><pre>
<span class="c"># $Id: jsonutil.py,v 1.2 2011/05/26 19:34:19 edwlan Exp $</span>
<span class="sd">"""</span>
<span class="sd">This module is primarily a wrapper around simplejson in order to make</span>
<span class="sd">it behave like demjson</span>
<span class="sd">- If an object being encoded has a 'json_equivalent' attribute, that will be called to get a (more)</span>
<span class="sd"> serializable object</span>
<span class="sd">- if it has an 'items' method, it will be called</span>
<span class="sd"> - if it defines both items and iteritems, the second will be used)</span>
<span class="sd">- if it is iterable, it will be made into a list</span>
<span class="sd">- otherwise 'str' will be called on the object, and that result will be used</span>
<span class="sd">"""</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s">'encode'</span><span class="p">,</span> <span class="s">'decode'</span><span class="p">]</span>
<span class="kn">import</span> <span class="nn">functools</span>
<span class="k">try</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">json</span>
<span class="k">except</span> <span class="ne">ImportError</span><span class="p">:</span>
<span class="kn">import</span> <span class="nn">simplejson</span> <span class="kn">as</span> <span class="nn">json</span>
<span class="k">def</span> <span class="nf">dict_encode</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span>
<span class="n">items</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="s">'iteritems'</span><span class="p">,</span> <span class="n">obj</span><span class="o">.</span><span class="n">items</span><span class="p">)</span>
<span class="k">return</span> <span class="nb">dict</span><span class="p">(</span> <span class="p">(</span><span class="n">encode_</span><span class="p">(</span><span class="n">k</span><span class="p">),</span><span class="n">encode_</span><span class="p">(</span><span class="n">v</span><span class="p">))</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span><span class="n">v</span> <span class="ow">in</span> <span class="n">items</span><span class="p">()</span> <span class="p">)</span>
<span class="k">def</span> <span class="nf">list_encode</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span>
<span class="k">return</span> <span class="nb">list</span><span class="p">(</span><span class="n">encode_</span><span class="p">(</span><span class="n">i</span><span class="p">)</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="n">obj</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">safe_encode</span><span class="p">(</span><span class="n">obj</span><span class="p">):</span>
<span class="sd">'''Always return something, even if it is useless for serialization'''</span>
<span class="k">try</span><span class="p">:</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">TypeError</span><span class="p">:</span> <span class="n">obj</span> <span class="o">=</span> <span class="nb">str</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
<span class="k">return</span> <span class="n">obj</span>
<span class="k">def</span> <span class="nf">encode_</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="o">**</span><span class="n">kw</span><span class="p">):</span>
<span class="n">obj</span> <span class="o">=</span> <span class="nb">getattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="s">'json_equivalent'</span><span class="p">,</span> <span class="k">lambda</span><span class="p">:</span> <span class="n">obj</span><span class="p">)()</span>
<span class="n">func</span> <span class="o">=</span> <span class="k">lambda</span> <span class="n">x</span><span class="p">:</span> <span class="n">x</span>
<span class="k">if</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="s">'items'</span><span class="p">):</span>
<span class="n">func</span> <span class="o">=</span> <span class="n">dict_encode</span>
<span class="k">elif</span> <span class="nb">hasattr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="s">'__iter__'</span><span class="p">):</span>
<span class="n">func</span> <span class="o">=</span> <span class="n">list_encode</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">func</span> <span class="o">=</span> <span class="n">safe_encode</span>
<span class="k">return</span> <span class="n">func</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
<span class="n">encode</span> <span class="o">=</span> <span class="n">functools</span><span class="o">.</span><span class="n">partial</span><span class="p">(</span><span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">,</span> <span class="n">default</span><span class="o">=</span><span class="n">encode_</span><span class="p">)</span>
<span class="n">decode</span> <span class="o">=</span> <span class="n">json</span><span class="o">.</span><span class="n">loads</span>
<span class="n">__version__</span> <span class="o">=</span> <span class="s">"$Revision: 1.2 $"</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s">":"</span><span class="p">)[</span><span class="mi">1</span><span class="p">][:</span><span class="o">-</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">strip</span><span class="p">()</span>
</pre></div>
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