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#pragma once
#include "logging.hpp"
#include "nlohmann/json.hpp"
#include <boost/beast/http/message.hpp>
#include <boost/beast/http/string_body.hpp>
#include <utils/hex_utils.hpp>
#include <optional>
#include <string>
#include <string_view>
namespace crow
{
template <typename Adaptor, typename Handler>
class Connection;
struct Response
{
template <typename Adaptor, typename Handler>
friend class crow::Connection;
using response_type =
boost::beast::http::response<boost::beast::http::string_body>;
std::optional<response_type> stringResponse;
nlohmann::json jsonValue;
void addHeader(const std::string_view key, const std::string_view value)
{
stringResponse->set(key, value);
}
void addHeader(boost::beast::http::field key, std::string_view value)
{
stringResponse->set(key, value);
}
Response() : stringResponse(response_type{})
{}
Response(Response&& res) noexcept :
stringResponse(std::move(res.stringResponse)), completed(res.completed)
{
jsonValue = std::move(res.jsonValue);
// See note in operator= move handler for why this is needed.
if (!res.completed)
{
completeRequestHandler = std::move(res.completeRequestHandler);
res.completeRequestHandler = nullptr;
}
isAliveHelper = res.isAliveHelper;
res.isAliveHelper = nullptr;
}
~Response() = default;
Response(const Response&) = delete;
Response& operator=(const Response& r) = delete;
Response& operator=(Response&& r) noexcept
{
BMCWEB_LOG_DEBUG << "Moving response containers; this: " << this
<< "; other: " << &r;
if (this == &r)
{
return *this;
}
stringResponse = std::move(r.stringResponse);
r.stringResponse.emplace(response_type{});
jsonValue = std::move(r.jsonValue);
// Only need to move completion handler if not already completed
// Note, there are cases where we might move out of a Response object
// while in a completion handler for that response object. This check
// is intended to prevent destructing the functor we are currently
// executing from in that case.
if (!r.completed)
{
completeRequestHandler = std::move(r.completeRequestHandler);
r.completeRequestHandler = nullptr;
}
else
{
completeRequestHandler = nullptr;
}
completed = r.completed;
isAliveHelper = std::move(r.isAliveHelper);
r.isAliveHelper = nullptr;
return *this;
}
void result(unsigned v)
{
stringResponse->result(v);
}
void result(boost::beast::http::status v)
{
stringResponse->result(v);
}
boost::beast::http::status result() const
{
return stringResponse->result();
}
unsigned resultInt() const
{
return stringResponse->result_int();
}
std::string_view reason() const
{
return stringResponse->reason();
}
bool isCompleted() const noexcept
{
return completed;
}
std::string& body()
{
return stringResponse->body();
}
std::string_view getHeaderValue(std::string_view key) const
{
return stringResponse->base()[key];
}
void keepAlive(bool k)
{
stringResponse->keep_alive(k);
}
bool keepAlive() const
{
return stringResponse->keep_alive();
}
void preparePayload()
{
stringResponse->prepare_payload();
}
void clear()
{
BMCWEB_LOG_DEBUG << this << " Clearing response containers";
stringResponse.emplace(response_type{});
jsonValue.clear();
completed = false;
}
void write(std::string_view bodyPart)
{
stringResponse->body() += std::string(bodyPart);
}
void end()
{
// Only set etag if this request succeeded
if (result() == boost::beast::http::status::ok)
{
// and the json response isn't empty
if (!jsonValue.empty())
{
size_t hashval = std::hash<nlohmann::json>{}(jsonValue);
std::string hexVal = "\"" + intToHexString(hashval, 8) + "\"";
addHeader(boost::beast::http::field::etag, hexVal);
}
}
if (completed)
{
BMCWEB_LOG_ERROR << this << " Response was ended twice";
return;
}
completed = true;
BMCWEB_LOG_DEBUG << this << " calling completion handler";
if (completeRequestHandler)
{
BMCWEB_LOG_DEBUG << this << " completion handler was valid";
completeRequestHandler(*this);
}
}
bool isAlive() const
{
return isAliveHelper && isAliveHelper();
}
void setCompleteRequestHandler(std::function<void(Response&)>&& handler)
{
BMCWEB_LOG_DEBUG << this << " setting completion handler";
completeRequestHandler = std::move(handler);
// Now that we have a new completion handler attached, we're no longer
// complete
completed = false;
}
std::function<void(Response&)> releaseCompleteRequestHandler()
{
BMCWEB_LOG_DEBUG << this << " releasing completion handler"
<< static_cast<bool>(completeRequestHandler);
std::function<void(Response&)> ret = completeRequestHandler;
completeRequestHandler = nullptr;
completed = true;
return ret;
}
void setIsAliveHelper(std::function<bool()>&& handler)
{
isAliveHelper = std::move(handler);
}
std::function<bool()> releaseIsAliveHelper()
{
std::function<bool()> ret = std::move(isAliveHelper);
isAliveHelper = nullptr;
return ret;
}
private:
bool completed = false;
std::function<void(Response&)> completeRequestHandler;
std::function<bool()> isAliveHelper;
};
} // namespace crow
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