headers_propagator.hpp

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#pragma once
 
/// @file userver/server/middlewares/headers_propagator.hpp
/// @brief HTTP middleware that propagates request headers
 
#include <userver/server/middlewares/http_middleware_base.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace server::middlewares {
 
class HeadersPropagator final : public HttpMiddlewareBase {
public:
    explicit HeadersPropagator(const handlers::HttpHandlerBase&, std::vector<std::string> headers);
 
private:
    void HandleRequest(http::HttpRequest& request, request::RequestContext& context) const override;
 
    std::vector<std::string> headers_;
};
 
class HeadersPropagatorFactory final : public HttpMiddlewareFactoryBase {
public:
    static constexpr std::string_view kName = "headers-propagator";
 
    HeadersPropagatorFactory(const components::ComponentConfig&, const components::ComponentContext&);
 
    static yaml_config::Schema GetStaticConfigSchema();
 
private:
    std::unique_ptr<HttpMiddlewareBase> Create(
        const handlers::HttpHandlerBase&,
        yaml_config::YamlConfig middleware_config
    ) const override;
 
    std::vector<std::string> headers_;
};
 
}  // namespace server::middlewares
 
template <>
inline constexpr bool components::kHasValidate<server::middlewares::HeadersPropagatorFactory> = true;
 
template <>
inline constexpr auto
    components::kConfigFileMode<server::middlewares::HeadersPropagatorFactory> = ConfigFileMode::kNotRequired;
 
USERVER_NAMESPACE_END