parse_status_code.hpp

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#pragma once
 
/// @file userver/http/parse_status_code.hpp
/// @brief @copybrief http::Parse
/// @ingroup userver_universal
 
#include <fmt/format.h>
 
#include <userver/formats/common/meta.hpp>
#include <userver/formats/parse/to.hpp>
#include <userver/http/status_code.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace http {
 
/// @brief Parsing helpers for HTTP status codes from format values.
template <formats::common::kIsFormatValue Value>
StatusCode Parse(const Value& value, formats::parse::To<StatusCode>) {
    using IntType = std::underlying_type_t<StatusCode>;
    constexpr IntType kMinCode = 100;
    constexpr IntType kMaxCode = 599;
 
    const auto integer = value.template As<IntType>();
    if (integer < kMinCode || integer > kMaxCode) {
        throw typename Value::Exception(fmt::format(
            "StatusCode value {} out of [{}..{}] range at '{}'",
            integer,
            kMinCode,
            kMaxCode,
            value.GetPath()
        ));
    }
 
    return StatusCode{integer};
}
 
}  // namespace http
 
USERVER_NAMESPACE_END