ass="o">=</span> <span class="kt">HTTPStatusCode</span><span class="o">.</span><span class="n">badRequest</span>
             <span class="k">try</span> <span class="n">response</span><span class="o">.</span><span class="nf">write</span><span class="p">(</span><span class="nv">from</span><span class="p">:</span> <span class="s">"No protocol specified in the Upgrade header"</span><span class="p">)</span>
             <span class="k">try</span> <span class="n">response</span><span class="o">.</span><span clas