<span class="k">def</span> <span class="nf">make_response</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">rv</span><span class="p">):</span> <span class="o">...</span> <span class="k">if</span> <span class="ow">not</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rv</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">response_class</span><span class="p">):</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">rv</span><span class="p">,</span> <span class="p">(</span><span class="n">text_type</span><span class="p">,</span> <span class="nb">bytes</span><span class="p">,</span> <span class="nb">bytearray</span><span class="p">)):</span> <span class="n">rv</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">response_class</span><span class="p">(</span><span class="n">rv</span><span class="p">,</span> <span class="n">headers</span><span class="o">=</span><span class="n">headers</span><span class="p">,</span> <span class="n">status</span><span class="o">=</span><span class="n">status</span><span class="p">)</span> <span class="n">headers</span> <span class="o">=</span> <span class="n">status</span> <span class="o">=</span> <span class="k">None</span> <span class="c"># rv是 method handle返回的结果,在k神代码中是 <type 'unicode'></span> <span class="k">else</span><span class="p">:</span> <span class="n">rv</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">response_class</span><span class="o">.</span><span class="n">force_type</span><span class="p">(</span><span class="n">rv</span><span class="p">,</span> <span class="n">request</span><span class="o">.</span><span class="n">environ</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">safestr</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="n">encoding</span><span class="o">=</span><span class="s">'utf-8'</span><span class="p">):</span> <span class="sd">r"""</span> <span class="sd"> Converts any given object to utf-8 encoded string. </span> <span class="sd"> </span> <span class="sd"> >>> safestr('hello')</span> <span class="sd"> 'hello'</span> <span class="sd"> >>> safestr(u'\u1234')</span> <span class="sd"> '\xe1\x88\xb4'</span> <span class="sd"> >>> safestr(2)</span> <span class="sd"> '2'</span> <span class="sd"> """</span> <span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="nb">unicode</span><span class="p">):</span> <span class="k">return</span> <span class="n">obj</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="n">encoding</span><span class="p">)</span> <span class="k">elif</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">obj</span><span class="p">,</span> <span class="nb">str</span><span class="p">):</span> <span class="k">return</span> <span class="n">obj</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">'next'</span><span class="p">):</span> <span class="c"># iterator</span> <span class="k">return</span> <span class="n">itertools</span><span class="o">.</span><span class="n">imap</span><span class="p">(</span><span class="n">safestr</span><span class="p">,</span> <span class="n">obj</span><span class="p">)</span> <span class="k">else</span><span class="p">:</span> <span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">obj</span><span class="p">)</span>
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