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  <section id="request-and-response-vcl-objects">
<h1>Request and response VCL objects<a class="headerlink" href="#request-and-response-vcl-objects" title="Link to this heading">¶</a></h1>
<p>In VCL, there several important objects that you need to be aware of. These
objects can be accessed and manipulated using VCL.</p>
<dl class="simple">
<dt><em>req</em></dt><dd><p>The request object. When Varnish has received the request the <cite>req</cite> object is
created and populated. Most of the work you do in <cite>vcl_recv</cite> you
do on or with the <cite>req</cite> object.</p>
</dd>
<dt><em>bereq</em></dt><dd><p>The backend request object. Varnish constructs this before sending it to the
backend. It is based on the <cite>req</cite> object.</p>
</dd>
</dl>
<dl class="simple">
<dt><em>beresp</em></dt><dd><p>The backend response object. It contains the headers of the object
coming from the backend. If you want to modify the response coming from the
server you modify this object in <cite>vcl_backend_response</cite>.</p>
</dd>
<dt><em>resp</em></dt><dd><p>The HTTP response right before it is delivered to the client. It is
typically modified in <cite>vcl_deliver</cite>.</p>
</dd>
<dt><em>obj</em></dt><dd><p>The object as it is stored in cache. Read only.</p>
</dd>
</dl>
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