test-template.rsc

{
    :do {
        :local debug 1;
        :local flagInterface "";
        :local srcInterface "";
        :local srcAddress "";

        :set srcInterface "###INTERFACE_NAME###";

        :set flagInterface "###FLAG_INTERFACE_NAME###";

                if ( $debug > 0 ) do={
                        :log info "Debug step1";
                }

                :local ipAddressesForInterface [:len [/ip/address/find where interface=$srcInterface and disabled=no ]];

                if ( $debug > 0 ) do={
                        :log info "Debug step2";
                        if ( $ipAddressesForInterface > 1 ) do={
                                :log info "ERR, there are more then 1 ip addresses for the interface";
                        }
                }

        :local srcAddressCidr [/ip/address/get [find where interface=$srcInterface and disabled=no] address ];

        :local urlString "###URL###";
        :local result "";
        :log info "Debug step3";

    :do {
        if ([/interface/bridge/print count-only where name=$flagInterface ] = 0) do={
            [/interface/bridge/add name=$flagInterface disabled=yes];
        }
    } on-error={
        :log info "Error creating the flag interface";
    }
        :local currentFlagDisabledState [/interface/bridge/get  [find where name=$flagInterface ] value-name=disabled ];


        :for i from=( [:len $srcAddressCidr] - 1) to=0 do={
            :if ( [:pick $srcAddressCidr $i] = "/") do={
                :set srcAddress [:pick $srcAddressCidr 0 $i];
            }
        }

        :do {
            :set result [/tool/fetch src-address=$srcAddress url=$urlString as-value output=none];
            if ($currentFlagDisabledState = true) do={
                [/interface/bridge/set [find where name=$flagInterface ] disabled=no ];
            }
        } on-error={
            :log info ("Error downloading url: " . $urlString);
            if ($currentFlagDisabledState = false) do={
                [/interface/bridge/set [find where name=$flagInterface ] disabled=yes];
            }
        }
        :log info "success";

    } on-error={
        :log info "Runtime Error";
    }

}