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<h1>WebAppContaining</h1>
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<pre class="highlight"><code><span class="kd">public</span> <span class="kd">protocol</span> <span class="kt">WebAppContaining</span><span class="p">:</span> <span class="kd">class</span></code></pre>
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<p>Class protocol containing the WebApp that responds to the incoming HTTP requests.
The following is an example of a WebApp that returns the request as a response:</p>
<pre class="highlight swift"><code> <span class="kd">class</span> <span class="kt">EchoWebApp</span><span class="p">:</span> <span class="kt">WebAppContaining</span> <span class="p">{</span>
<span class="kd">func</span> <span class="nf">serve</span><span class="p">(</span><span class="nv">req</span><span class="p">:</span> <span class="kt">HTTPRequest</span><span class="p">,</span> <span class="nv">res</span><span class="p">:</span> <span class="kt">HTTPResponseWriter</span> <span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">HTTPBodyProcessing</span> <span class="p">{</span>
<span class="n">res</span><span class="o">.</span><span class="nf">writeHeader</span><span class="p">(</span><span class="nv">status</span><span class="p">:</span> <span class="o">.</span><span class="n">ok</span><span class="p">,</span> <span class="nv">headers</span><span class="p">:</span> <span class="p">[:])</span>
<span class="k">return</span> <span class="o">.</span><span class="n">processBody</span> <span class="p">{</span> <span class="p">(</span><span class="n">chunk</span><span class="p">,</span> <span class="n">stop</span><span class="p">)</span> <span class="k">in</span>
<span class="k">switch</span> <span class="n">chunk</span> <span class="p">{</span>
<span class="k">case</span> <span class="o">.</span><span class="nf">chunk</span><span class="p">(</span><span class="k">let</span> <span class="nv">data</span><span class="p">,</span> <span class="k">let</span> <span class="nv">finishedProcessing</span><span class="p">):</span>
<span class="n">res</span><span class="o">.</span><span class="nf">writeBody</span><span class="p">(</span><span class="n">data</span><span class="p">)</span> <span class="p">{</span> <span class="n">_</span> <span class="k">in</span>
<span class="nf">finishedProcessing</span><span class="p">()</span>
<span class="p">}</span>
<span class="k">case</span> <span class="o">.</span><span class="nv">end</span><span class="p">:</span>
<span class="n">res</span><span class="o">.</span><span class="nf">done</span><span class="p">()</span>
<span class="k">default</span><span class="p">:</span>
<span class="n">stop</span> <span class="o">=</span> <span class="kc">true</span>
<span class="n">res</span><span class="o">.</span><span class="nf">abort</span><span class="p">()</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="p">}</span>
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<code>
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<a class="token" href="#/s:FP4HTTP16WebAppContaining5serveFT3reqVS_11HTTPRequest3resPS_18HTTPResponseWriter__OS_18HTTPBodyProcessing">serve(req:res:)</a>
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<p>serve: function called when a new HTTP request is received by the HTTP server.</p>
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<h4>Declaration</h4>
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<p class="aside-title">Swift</p>
<pre class="highlight"><code><span class="kd">func</span> <span class="nf">serve</span><span class="p">(</span><span class="nv">req</span><span class="p">:</span> <span class="kt"><a href="../Structs/HTTPRequest.html">HTTPRequest</a></span><span class="p">,</span> <span class="nv">res</span><span class="p">:</span> <span class="kt"><a href="../Protocols/HTTPResponseWriter.html">HTTPResponseWriter</a></span> <span class="p">)</span> <span class="o">-&gt;</span> <span class="kt"><a href="../Enums/HTTPBodyProcessing.html">HTTPBodyProcessing</a></span></code></pre>
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<h4>Parameters</h4>
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<code>
<em>req</em>
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<p>the incoming HTTP request.</p>
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<code>
<em>res</em>
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<p>an writer providing functions to create an HTTP reponse to the request.</p>
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