62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
namespace seafire::resources
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{
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template<GettableResource R>
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void
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handle_get(server::request_t& req,
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server::response_t& res,
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R const& resource,
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std::optional<protocol::media_type_t> const& accepted_type,
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get_kind_t kind)
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{
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auto rep = common::invoke(resource, req, &R::get);
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auto select = [&]() -> decltype(rep)
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{
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if constexpr (representation::traits::is_optional_representation_v<decltype(rep)>) {
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if (!rep) {
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return std::nullopt;
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}
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return representation::select(*rep, accepted_type);
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}
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else {
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return representation::select(rep, accepted_type);
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}
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};
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auto selected_rep = select();
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if (!selected_rep) {
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res.send(server::common_error_t::not_found);
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return;
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}
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if (!check_preconditions(req, res, *selected_rep))
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return;
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namespace rfc7231 = protocol::rfc7231;
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namespace rfc7232 = protocol::rfc7232;
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if (auto opt_val = get_etag(resource); opt_val)
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set<rfc7232::etag_t>(res, *opt_val);
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if (auto opt_val = get_last_modified(resource); opt_val)
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set<rfc7232::last_modified_t>(res, *opt_val);
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if (kind == get_kind_t::created_resource || kind == get_kind_t::updated_resource) {
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if (auto opt_val = get_location(resource); opt_val)
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set<rfc7231::location_t>(res, *opt_val);
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}
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protocol::status_code_t status{200};
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if (kind == get_kind_t::created_resource)
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status = 201;
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bool const send_content = kind != get_kind_t::head;
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representation::send(req, res, status, *selected_rep, send_content);
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}
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} // namespace seafire::resources
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