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  <section id="manipulating-request-headers-in-vcl">
<h1>Manipulating request headers in VCL<a class="headerlink" href="#manipulating-request-headers-in-vcl" title="Link to this heading">¶</a></h1>
<p>Lets say we want to remove the cookie for all objects in the <cite>/images</cite>
directory of our web server:</p>
<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">sub</span> <span class="n">vcl_recv</span> <span class="p">{</span>
  <span class="k">if</span> <span class="p">(</span><span class="n">req</span><span class="o">.</span><span class="n">url</span> <span class="o">~</span> <span class="s2">&quot;^/images&quot;</span><span class="p">)</span> <span class="p">{</span>
    <span class="n">unset</span> <span class="n">req</span><span class="o">.</span><span class="n">http</span><span class="o">.</span><span class="n">cookie</span><span class="p">;</span>
  <span class="p">}</span>
<span class="p">}</span>
</pre></div>
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<p>Now, when the request is handled to the backend server there will be
no cookie header. The interesting line is the one with the
if-statement. It matches the URL, taken from the request object, and
matches it against the regular expression. Note the match operator. If
it matches the Cookie: header of the request is unset (deleted).</p>
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