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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include <zencore/logging.h>
#include <zencore/uid.h>
ZEN_THIRD_PARTY_INCLUDES_START
#include <http_parser.h>
ZEN_THIRD_PARTY_INCLUDES_END
#include <atomic>
#include <cstdint>
#include <string>
#include <string_view>
namespace zen {
class HttpTrafficInspector
{
public:
enum class Direction
{
Request,
Response
};
HttpTrafficInspector(Direction Dir, std::string_view SessionLabel);
void Inspect(const char* Data, size_t Length);
uint64_t GetMessageCount() const { return m_MessageCount.load(std::memory_order_relaxed); }
bool IsUpgraded() const { return m_Upgraded.load(std::memory_order_relaxed); }
Oid GetSessionId() const;
bool HasSessionId() const;
void SetObserver(class IHttpTrafficObserver* Observer) { m_Observer = Observer; }
private:
int OnUrl(const char* Data, size_t Length);
int OnHeaderField(const char* Data, size_t Length);
int OnHeaderValue(const char* Data, size_t Length);
int OnHeadersComplete();
int OnMessageComplete();
void ResetMessageState();
static HttpTrafficInspector* GetThis(http_parser* Parser) { return static_cast<HttpTrafficInspector*>(Parser->data); }
static http_parser_settings s_RequestSettings;
static http_parser_settings s_ResponseSettings;
LoggerRef Log() { return m_Log; }
LoggerRef m_Log;
http_parser m_Parser;
Direction m_Direction;
std::string m_SessionLabel;
bool m_Disabled = false;
// Per-message state
std::string m_Url;
std::string m_Method;
uint16_t m_StatusCode = 0;
int64_t m_ContentLength = -1;
std::string m_CurrentHeaderField;
std::atomic<uint64_t> m_MessageCount{0};
std::atomic<bool> m_Upgraded{false};
Oid m_SessionId = Oid::Zero;
bool m_SessionIdCaptured = false;
IHttpTrafficObserver* m_Observer = nullptr;
};
class IHttpTrafficObserver
{
public:
virtual ~IHttpTrafficObserver() = default;
virtual void OnMessageComplete(HttpTrafficInspector::Direction Dir,
std::string_view Method,
std::string_view Url,
uint16_t StatusCode,
int64_t ContentLength) = 0;
};
} // namespace zen
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