http_error.hpp

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#pragma once
 
/// @file userver/server/http/http_error.hpp
/// @brief @copybrief server::http::GetHttpStatus
 
#include <stdexcept>
#include <string>
 
#include <userver/server/handlers/exceptions.hpp>
#include <userver/server/http/http_status.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace server::http {
 
/**
 * @brief Get http status code mapped to generic handler error code.
 *
 * If there is no explicit mapping in the http_error.cpp, will return
 * HttpStatus::kBadRequest for code values less than
 * HandlerErrorCode::kServerSideError and will return
 * HttpStatus::kInternalServerError for the rest of codes.
 */
HttpStatus GetHttpStatus(handlers::HandlerErrorCode) noexcept;
 
/// For server::http::CustomHandlerException, uses the provided HttpStatus.
/// For a generic server::handler::CustomHandlerException, converts its
/// server::handler::HandlerErrorCode to HttpStatus.
HttpStatus GetHttpStatus(const handlers::CustomHandlerException& exception) noexcept;
 
/// @brief An extension of server::handlers::CustomHandlerException that allows
/// to specify a custom HttpStatus.
///
/// For non-HTTP protocols, the status code will be derived from the attached
/// server::handlers::HandlerErrorCode.
class CustomHandlerException : public handlers::CustomHandlerException {
public:
    /// @see server::handlers::CustomHandlerException for the description of how
    /// `args` that can augment error messages.
    /// @snippet server/handlers/exceptions_test.cpp  Sample construction HTTP
    template <typename... Args>
    CustomHandlerException(handlers::HandlerErrorCode error_code, HttpStatus http_status, Args&&... args)
        : handlers::CustomHandlerException(error_code, std::forward<Args>(args)...),
          http_status_(http_status)
    {}
 
    HttpStatus GetHttpStatus() const { return http_status_; }
 
private:
    HttpStatus http_status_;
};
 
}  // namespace server::http
 
USERVER_NAMESPACE_END