Method invoke

plugins/experimental/txn_box/plugin/src/Machinery.cc:90–102

Do_ua_req_url_host::Do_ua_req_url_host(Expr &&expr) : _expr(std::move(expr)) {}

Errata
Do_ua_req_url_host::invoke(Context &ctx)
{
  if (auto hdr{ctx.ua_req_hdr()}; hdr.is_valid()) {
    if (auto url{hdr.url()}; url.is_valid()) {
      auto value = ctx.extract(_expr);
      if (auto host = std::get_if<IndexFor(STRING)>(&value); nullptr != host) {
        url.host_set(*host);
      }
    }
  }
  return {};
}

swoc::Rv<Directive::Handle>
Do_ua_req_url_host::load(Config &cfg, CfgStaticData const *, YAML::Node drtv_node, swoc::TextView const &, swoc::TextView const &,