s="indexterm" name="idm90634"></a>
      </p>
<p>
        Returns <code class="computeroutput"><span class="keyword">true</span></code> if the specified
        HTTP request is a WebSocket Upgrade.
      </p>
<h5>
<a name="beast.ref.boost__beast__websocket__is_upgrade.h0"></a>
        <span class="phrase"><a name="beast.ref.boost__beast__websocket__is_upgrade.synopsis"></a></span><a class="link" href="boost__beast__websocket__is_upgrade.html#beast.ref.boost__beast__websocket__is_upgrade.synopsis">Synopsis</