<p>From the official kamailio documentation of the function <code>http_async_query(url, route_name)</code></p>
<pre><code>Sends HTTP(S) request asynchronously to the URL given in “url” parameter, which is a string that may contain pseudo variables.

Parameter “route_name” defines the route to be executed upon reception of HTTP reply, on error or on timeout. If a transaction exists before calling http_async_query(), it will be paused and resumed in this route, while the routing script execution will be stopped. If executed in a transactionless context, or if $http_req(suspend) is used not to suspend the transaction, the routing script execution will continue and the query result will be available in “route_name”.
</code></pre>
<p>Because the routing script execution <code>will be stopped</code> it's quite difficult for some advanced usages to restore the previous variables and logic and to continue with the execution.</p>
<p>The problem of resuming the work is delegated to the user and not Kamailio itself. I think Kamailio should freeze the execution and store all needed data in memory to resume execution after the http response like for a normal http sync query.</p>
<p>So the <code>stopping</code> will become <code>pausing/resuming</code>.</p>

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