Outbound IP Registration to Azure SQL Using Azure Functions

UpdateFirewallRulesHttpTrigger-3.cs

[FunctionName("UpdateFirewallRulesHttpTrigger")]
public static async Task<HttpResponseMessage> Run(
    [HttpTrigger(AuthorizationLevel.Function, "post", Route = "firewall/rules")]HttpRequestMessage req,
    TraceWriter log)
{
    ...

    log.Info($"Firewall rules on database servers in {resourceGroupName} are updating...");

    var res = await azure.WebApps
                         .Inner
                         .ListByResourceGroupWithHttpMessagesAsync(resourceGroupName)
                         .ConfigureAwait(false);

    var webapps = res.Body.ToList();

    var outboundIps = webapps.SelectMany(p => p.OutboundIpAddresses.Split(','))
                             .Distinct()
                             .ToList();

    log.Info($"Firewall rules on database servers in {resourceGroupName} have been updated.");

    return req.CreateResponse(HttpStatusCode.OK);
}