Refactored websocket server and added static logger support.

1 files changed, 0 insertions, 471 deletions

diff --git a/zenhttp/websocketserver.cpp b/zenhttp/websocketserver.cpp
deleted file mode 100644
index 776ed1019..000000000
--- a/zenhttp/websocketserver.cpp
+++ /dev/null
@@ -1,471 +0,0 @@
-// Copyright Epic Games, Inc. All Rights Reserved.
-
-#include <zenhttp/websocketserver.h>
-
-#include <zencore/base64.h>
-#include <zencore/iobuffer.h>
-#include <zencore/logging.h>
-#include <zencore/sha1.h>
-#include <zencore/string.h>
-
-#include <span>
-#include <thread>
-
-ZEN_THIRD_PARTY_INCLUDES_START
-#include <fmt/format.h>
-#include <http_parser.h>
-#include <asio.hpp>
-ZEN_THIRD_PARTY_INCLUDES_END
-
-namespace zen::asio_http {
-
-using namespace std::literals;
-
-struct HttpParser
-{
-	HttpParser()
-	{
-		http_parser_init(&Parser, HTTP_REQUEST);
-		Parser.data = this;
-	}
-
-	size_t Parse(const char* Data, const size_t Size) { return http_parser_execute(&Parser, &ParserSettings, Data, Size); }
-
-	void GetHeaders(std::unordered_map<std::string_view, std::string_view>& OutHeaders)
-	{
-		OutHeaders.reserve(HeaderEntries.size());
-
-		for (const auto& E : HeaderEntries)
-		{
-			auto Name  = std::string_view(HeaderStream.Data() + E.Name.Offset, E.Name.Size);
-			auto Value = std::string_view(HeaderStream.Data() + E.Value.Offset, E.Value.Size);
-
-			OutHeaders[Name] = Value;
-		}
-	}
-
-	static void Initialize()
-	{
-		ParserSettings = {.on_message_begin =
-							  [](http_parser* P) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-
-								  Parser.Url		   = UrlEntry{};
-								  Parser.CurrentHeader = HeaderEntry{};
-								  Parser.IsUpgrade	   = false;
-								  Parser.IsComplete	   = false;
-
-								  Parser.HeaderStream.Clear();
-								  Parser.HeaderEntries.clear();
-
-								  return 0;
-							  },
-						  .on_url =
-							  [](http_parser* P, const char* Data, size_t Size) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-
-								  Parser.Url.Offset = Parser.HeaderStream.Pos();
-								  Parser.Url.Size	= Size;
-
-								  Parser.HeaderStream.Append(Data, uint32_t(Size));
-
-								  return 0;
-							  },
-						  .on_header_field =
-							  [](http_parser* P, const char* Data, size_t Size) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-
-								  if (Parser.CurrentHeader.Value.Size > 0)
-								  {
-									  Parser.HeaderEntries.push_back(Parser.CurrentHeader);
-									  Parser.CurrentHeader = HeaderEntry{};
-								  }
-
-								  if (Parser.CurrentHeader.Name.Size == 0)
-								  {
-									  Parser.CurrentHeader.Name.Offset = Parser.HeaderStream.Pos();
-								  }
-
-								  Parser.CurrentHeader.Name.Size += Size;
-
-								  Parser.HeaderStream.Append(Data, Size);
-
-								  return 0;
-							  },
-						  .on_header_value =
-							  [](http_parser* P, const char* Data, size_t Size) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-
-								  if (Parser.CurrentHeader.Value.Size == 0)
-								  {
-									  Parser.CurrentHeader.Value.Offset = Parser.HeaderStream.Pos();
-								  }
-
-								  Parser.CurrentHeader.Value.Size += Size;
-
-								  Parser.HeaderStream.Append(Data, Size);
-
-								  return 0;
-							  },
-						  .on_headers_complete =
-							  [](http_parser* P) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-
-								  if (Parser.CurrentHeader.Value.Size > 0)
-								  {
-									  Parser.HeaderEntries.push_back(Parser.CurrentHeader);
-									  Parser.CurrentHeader = HeaderEntry{};
-								  }
-
-								  Parser.IsUpgrade = P->upgrade > 0;
-
-								  return 0;
-							  },
-						  .on_message_complete =
-							  [](http_parser* P) {
-								  HttpParser& Parser = *reinterpret_cast<HttpParser*>(P->data);
-								  Parser.IsComplete	 = true;
-								  Parser.IsUpgrade	 = P->upgrade > 0;
-								  return 0;
-							  }};
-	}
-
-	struct MemStreamEntry
-	{
-		size_t Offset{};
-		size_t Size{};
-	};
-
-	class MemStream
-	{
-	public:
-		MemStream(size_t BlockSize = 1024) : m_BlockSize(BlockSize) {}
-
-		void Append(const char* Data, size_t Size)
-		{
-			const size_t NewSize = m_Size + Size;
-
-			if (NewSize > m_Buf.size())
-			{
-				m_Buf.resize(m_Buf.size() + m_BlockSize);
-			}
-
-			memcpy(m_Buf.data() + m_Size, Data, Size);
-			m_Size += Size;
-		}
-
-		const char* Data() const { return m_Buf.data(); }
-		size_t		Pos() const { return m_Size; }
-		void		Clear() { m_Size = 0; }
-
-	private:
-		std::vector<char> m_Buf;
-		size_t			  m_Size{};
-		size_t			  m_BlockSize{};
-	};
-
-	using UrlEntry = MemStreamEntry;
-
-	struct HeaderEntry
-	{
-		MemStreamEntry Name;
-		MemStreamEntry Value;
-	};
-
-	static http_parser_settings ParserSettings;
-
-	http_parser				 Parser;
-	MemStream				 HeaderStream;
-	std::vector<HeaderEntry> HeaderEntries;
-	HeaderEntry				 CurrentHeader{};
-	UrlEntry				 Url{};
-	bool					 IsUpgrade	= false;
-	bool					 IsComplete = false;
-};
-
-http_parser_settings HttpParser::ParserSettings;
-
-class AsioWebSocketServer final : public WebSocketServer
-{
-public:
-	AsioWebSocketServer() : m_Log(zen::logging::Get("websocket")) { HttpParser::Initialize(); }
-
-	virtual ~AsioWebSocketServer() { Shutdown(); }
-
-	virtual bool Run(const WebSocketServerOptions& Options) override
-	{
-		m_Acceptor = std::make_unique<asio::ip::tcp::acceptor>(m_IoService, asio::ip::tcp::v6());
-
-		m_Acceptor->set_option(asio::ip::v6_only(false));
-		m_Acceptor->set_option(asio::socket_base::reuse_address(true));
-		m_Acceptor->set_option(asio::ip::tcp::no_delay(true));
-		m_Acceptor->set_option(asio::socket_base::receive_buffer_size(128 * 1024));
-		m_Acceptor->set_option(asio::socket_base::send_buffer_size(256 * 1024));
-
-		asio::error_code Ec;
-		m_Acceptor->bind(asio::ip::tcp::endpoint(asio::ip::address_v6::any(), Options.Port), Ec);
-
-		if (Ec)
-		{
-			ZEN_ERROR("failed to bind websocket endpoint, error code '{}'", Ec.value());
-
-			return false;
-		}
-
-		m_Acceptor->listen();
-
-		BeginAccept();
-
-		StartIoThreads(Options.ThreadCount);
-
-		m_Running.store(true, std::memory_order_relaxed);
-
-		ZEN_INFO("websocket server running on port '{}'", Options.Port);
-
-		return true;
-	}
-
-	virtual void Shutdown() override
-	{
-		if (m_Running)
-		{
-			ZEN_INFO("websocket server shutting down");
-
-			m_Running = false;
-
-			m_Acceptor->close();
-			m_Acceptor.reset();
-			m_IoService.stop();
-
-			StopIoThreads();
-		}
-	}
-
-private:
-	enum class WebSocketState : uint32_t
-	{
-		kNone,
-		kHandshake,
-		kRead,
-		kWrite,
-		kError
-	};
-
-	struct WebSocketConnection : public std::enable_shared_from_this<WebSocketConnection>
-	{
-		WebSocketConnection(std::unique_ptr<asio::ip::tcp::socket>&& S, uint32_t ConnId) : Socket(std::move(S)), Id(ConnId) {}
-
-		std::unique_ptr<asio::ip::tcp::socket> Socket;
-		asio::streambuf						   ReadBuffer;
-		WebSocketState						   State;
-		HttpParser							   Parser;
-		uint32_t							   Id;
-	};
-
-	void BeginAccept()
-	{
-		auto				   Socket	 = std::make_unique<asio::ip::tcp::socket>(m_IoService);
-		asio::ip::tcp::socket& SocketRef = *Socket.get();
-
-		m_Acceptor->async_accept(SocketRef, [this, NewSocket = std::move(Socket)](const asio::error_code& Ec) mutable {
-			if (Ec)
-			{
-				ZEN_WARN("accept error, error code '{}'", Ec.value());
-			}
-			else
-			{
-				const uint32_t Id		  = m_ConnectionId.fetch_add(1);
-				auto		   Connection = std::make_shared<WebSocketConnection>(std::move(NewSocket), Id);
-
-				Connection->State = WebSocketState::kHandshake;
-
-				BeginRead(Connection);
-			}
-
-			if (m_Running.load(std::memory_order_relaxed))
-			{
-				BeginAccept();
-			}
-			else
-			{
-				m_Acceptor->close();
-			}
-		});
-	}
-
-	void BeginRead(std::shared_ptr<WebSocketConnection> Connection)
-	{
-		Connection->ReadBuffer.prepare(64 << 10);
-
-		asio::async_read(*Connection->Socket,
-						 Connection->ReadBuffer,
-						 asio::transfer_at_least(1),
-						 [Conn = Connection->shared_from_this(), this](const asio::error_code& Ec, std::size_t ByteCount) {
-							 if (Ec)
-							 {
-								 ZEN_ERROR("read FAILED, connection '{}', error code '{}'", Conn->Id, Ec.value());
-								 Conn->Socket->close();
-								 return;
-							 }
-
-							 ZEN_TRACE("reading {}B from connection '{}'", ByteCount, Conn->Id);
-
-							 WebSocketState NextState = WebSocketState::kError;
-
-							 switch (Conn->State)
-							 {
-								 case WebSocketState::kHandshake:
-									 NextState = ProcessHandshake(Conn);
-									 break;
-							 }
-
-							 Conn->State = NextState;
-
-							 if (Conn->State == WebSocketState::kError)
-							 {
-								 ZEN_TRACE("process error, connection '{}'", Conn->Id);
-								 Conn->Socket->close();
-								 return;
-							 }
-
-							 BeginRead(Conn);
-						 });
-	}
-
-	WebSocketState ProcessHandshake(std::shared_ptr<WebSocketConnection> Connection)
-	{
-		HttpParser&				  Parser = Connection->Parser;
-		const asio::const_buffer& Buffer = Connection->ReadBuffer.data();
-
-		const size_t BytesParsed = Parser.Parse(reinterpret_cast<const char*>(Buffer.data()), Buffer.size());
-		Connection->ReadBuffer.consume(BytesParsed);
-
-		if (Parser.IsComplete)
-		{
-			if (Parser.IsUpgrade == false)
-			{
-				ZEN_DEBUG("invalid websocket handshake request, closing connection '{}'", Connection->Id);
-
-				return WebSocketState::kError;
-			}
-
-			static constexpr std::string_view WebSocketKey		   = "Sec-WebSocket-Key"sv;
-			static constexpr std::string_view WebSocketOriginKey   = "Sec-WebSocket-Origin"sv;
-			static constexpr std::string_view WebSocketProtocolKey = "Sec-WebSocket-Protocol"sv;
-			static constexpr std::string_view WebSocketVersionKey  = "Sec-WebSocket-Version"sv;
-			static constexpr std::string_view WebSocketAcceptKey   = "Sec-WebSocket-Accept"sv;
-			static constexpr std::string_view UpgradeKey		   = "Upgrade"sv;
-			static constexpr std::string_view WebSocketGuid		   = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"sv;
-
-			std::unordered_map<std::string_view, std::string_view> Headers;
-			Parser.GetHeaders(Headers);
-
-			ZEN_DEBUG("handshake, Origin='{}', Protocol='{}', Version='{}', Key='{}'",
-					  Headers[WebSocketOriginKey],
-					  Headers[WebSocketProtocolKey],
-					  Headers[WebSocketVersionKey],
-					  Headers[WebSocketKey]);
-
-			ExtendableStringBuilder<128> Sb;
-			Sb << Headers[WebSocketKey] << WebSocketGuid;
-
-			SHA1Stream HashStream;
-			HashStream.Append(Sb.Data(), Sb.Size());
-
-			SHA1 Hash = HashStream.GetHash();
-			Sb.Reset();
-
-			const uint32_t EncodedSize = Base64::GetEncodedDataSize(sizeof(SHA1::Hash));
-			Sb.AddUninitialized(EncodedSize);
-			Base64::Encode(Hash.Hash, sizeof(SHA1::Hash), Sb.Data());
-
-			std::string AcceptHash = Sb.ToString();
-
-			Sb.Reset();
-			Sb << "HTTP/1.1 101 Switching Protocols\r\n"sv;
-			Sb << "Upgrade: websocket\r\n"sv;
-			Sb << "Connection: Upgrade\r\n"sv;
-			Sb << WebSocketProtocolKey << ": " << Headers[WebSocketProtocolKey] << "\r\n";
-			Sb << WebSocketAcceptKey << ": " << AcceptHash << "\r\n"
-			   << "\r\n"sv;
-
-			IoBuffer		   Response = IoBufferBuilder::MakeCloneFromMemory(MakeMemoryView(Sb.ToView()));
-			asio::const_buffer ResponseView(Response.Data(), Response.Size());
-			const uint64_t	   ResponseLength = Response.Size();
-
-			asio::async_write(
-				*Connection->Socket,
-				asio::buffer(Response.Data(), Response.Size()),
-				asio::transfer_exactly(ResponseLength),
-				[this, Conn = Connection->shared_from_this(), Buf = Response](const asio::error_code& Ec, std::size_t ByteCount) {
-					if (Ec)
-					{
-						ZEN_ERROR("write {}B FAILED, error code '{}'", ByteCount, Ec.value());
-					}
-					else
-					{
-						ZEN_DEBUG("write {}B OK", ByteCount);
-					}
-				});
-
-			return WebSocketState::kRead;
-		}
-
-		return WebSocketState::kHandshake;
-	}
-
-	void StartIoThreads(uint32_t ThreadCount)
-	{
-		ZEN_DEBUG("starting '{}' websocket I/O thread(s)");
-
-		for (uint32_t Idx = 0; Idx < ThreadCount; Idx++)
-		{
-			m_ThreadPool.emplace_back([this, ThreadId = Idx + 1] {
-				try
-				{
-					m_IoService.run();
-				}
-				catch (std::exception& Err)
-				{
-					ZEN_ERROR("process websocket request FAILED, reason '{}'", Err.what());
-				}
-
-				ZEN_DEBUG("websocket I/O thread '{}' exiting", ThreadId);
-			});
-		}
-	}
-
-	void StopIoThreads()
-	{
-		for (std::thread& Thread : m_ThreadPool)
-		{
-			if (Thread.joinable())
-			{
-				Thread.join();
-			}
-		}
-
-		m_ThreadPool.clear();
-	}
-
-	spdlog::logger& Log() { return m_Log; }
-	spdlog::logger& m_Log;
-
-	asio::io_service						 m_IoService;
-	std::unique_ptr<asio::ip::tcp::acceptor> m_Acceptor;
-	std::atomic_bool						 m_Running{};
-	std::atomic_uint32_t					 m_ConnectionId{1};
-	std::vector<std::thread>				 m_ThreadPool;
-};
-
-}  // namespace zen::asio_http
-
-namespace zen {
-
-std::unique_ptr<WebSocketServer>
-WebSocketServer::Create()
-{
-	return std::make_unique<asio_http::AsioWebSocketServer>();
-}
-
-}  // namespace zen