4 files changed, 808 insertions, 0 deletions

diff --git a/source/HTTPServer/HTTPMessage.cpp b/source/HTTPServer/HTTPMessage.cpp
new file mode 100644
index 000000000..b784cb941
--- /dev/null
+++ b/source/HTTPServer/HTTPMessage.cpp
@@ -0,0 +1,285 @@
+
+// HTTPMessage.cpp
+
+// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes
+
+#include "Globals.h"
+#include "HTTPMessage.h"
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHTTPMessage:
+
+cHTTPMessage::cHTTPMessage(eKind a_Kind) :
+	m_Kind(a_Kind)
+{
+}
+
+
+
+
+
+void cHTTPMessage::AddHeader(const AString & a_Key, const AString & a_Value)
+{
+	cNameValueMap::iterator itr = m_Headers.find(a_Key);
+	if (itr == m_Headers.end())
+	{
+		m_Headers[a_Key] = a_Value;
+	}
+	else
+	{
+		// The header-field key is specified multiple times, combine into comma-separated list (RFC 2616 @ 4.2)
+		itr->second.append(", ");
+		itr->second.append(a_Value);
+	}
+	
+	// Special processing for well-known headers:
+	if (a_Key == "Content-Type")
+	{
+		m_ContentType = m_Headers["Content-Type"];
+	}
+	else if (a_Key == "Content-Length")
+	{
+		m_ContentLength = atoi(m_Headers["Content-Length"].c_str());
+	}
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHTTPRequest:
+
+cHTTPRequest::cHTTPRequest(void) :
+	super(mkRequest)
+{
+}
+
+
+
+
+
+bool cHTTPRequest::ParseHeaders(const char * a_IncomingData, size_t a_IdxEnd)
+{
+	// The first line contains the method and the URL:
+	size_t Next = ParseRequestLine(a_IncomingData, a_IdxEnd);
+	if (Next == AString::npos)
+	{
+		return false;
+	}
+	
+	// The following lines contain headers:
+	AString Key;
+	const char * Data = a_IncomingData + Next;
+	size_t End = a_IdxEnd - Next;
+	while (End > 0)
+	{
+		Next = ParseHeaderField(Data, End, Key);
+		if (Next == AString::npos)
+		{
+			return false;
+		}
+		ASSERT(End >= Next);
+		Data += Next;
+		End -= Next;
+	}
+	
+	return HasReceivedContentLength();
+}
+
+
+
+
+size_t cHTTPRequest::ParseRequestLine(const char * a_Data, size_t a_IdxEnd)
+{	
+	// Ignore the initial CRLFs (HTTP spec's "should")
+	size_t LineStart = 0;
+	while (
+		(LineStart < a_IdxEnd) &&
+		(
+			(a_Data[LineStart] == '\r') ||
+			(a_Data[LineStart] == '\n')
+		)
+	)
+	{
+		LineStart++;
+	}
+	if (LineStart >= a_IdxEnd)
+	{
+		return AString::npos;
+	}
+	
+	size_t Last = LineStart;
+	int NumSpaces = 0;
+	for (size_t i = LineStart; i < a_IdxEnd; i++)
+	{
+		switch (a_Data[i])
+		{
+			case ' ':
+			{
+				switch (NumSpaces)
+				{
+					case 0:
+					{
+						m_Method.assign(a_Data, Last, i - Last - 1);
+						break;
+					}
+					case 1:
+					{
+						m_URL.assign(a_Data, Last, i - Last - 1);
+						break;
+					}
+					default:
+					{
+						// Too many spaces in the request
+						return AString::npos;
+					}
+				}
+				Last = i + 1;
+				NumSpaces += 1;
+				break;
+			}
+			case '\n':
+			{
+				if ((i == 0) || (a_Data[i] != '\r') || (NumSpaces != 2) || (i < Last + 7))
+				{
+					// LF too early, without a CR, without two preceeding spaces or too soon after the second space
+					return AString::npos;
+				}
+				// Check that there's HTTP/version at the end
+				if (strncmp(a_Data + Last, "HTTP/1.", 7) != 0)
+				{
+					return AString::npos;
+				}
+				return i;
+			}
+		}  // switch (a_Data[i])
+	}  // for i - a_Data[]
+	return AString::npos;
+}
+
+
+
+
+
+size_t cHTTPRequest::ParseHeaderField(const char * a_Data, size_t a_IdxEnd, AString & a_Key)
+{
+	if (*a_Data <= ' ')
+	{
+		size_t res = ParseHeaderFieldContinuation(a_Data + 1, a_IdxEnd - 1, a_Key);
+		return (res == AString::npos) ? res : (res + 1);
+	}
+	size_t ValueIdx = 0;
+	AString Key;
+	for (size_t i = 0; i < a_IdxEnd; i++)
+	{
+		switch (a_Data[i])
+		{
+			case '\n':
+			{
+				if ((ValueIdx == 0) || (i < ValueIdx - 2) || (i == 0) || (a_Data[i - 1] != '\r'))
+				{
+					// Invalid header field - no colon or no CR before LF
+					return AString::npos;
+				}
+				AString Value(a_Data, ValueIdx + 1, i - ValueIdx - 2);
+				AddHeader(Key, Value);
+				a_Key = Key;
+				return i + 1;
+			}
+			case ':':
+			{
+				if (ValueIdx == 0)
+				{
+					Key.assign(a_Data, 0, i);
+					ValueIdx = i;
+				}
+				break;
+			}
+			case ' ':
+			case '\t':
+			{
+				if (ValueIdx == i - 1)
+				{
+					// Value has started in this char, but it is whitespace, so move the start one char further
+					ValueIdx = i;
+				}
+			}
+		}  // switch (char)
+	}  // for i - m_IncomingHeaderData[]
+	// No header found, return the end-of-data index:
+	return a_IdxEnd;
+}
+
+
+
+
+
+size_t cHTTPRequest::ParseHeaderFieldContinuation(const char * a_Data, size_t a_IdxEnd, AString & a_Key)
+{
+	size_t Start = 0;
+	for (size_t i = 0; i < a_IdxEnd; i++)
+	{
+		if ((a_Data[i] > ' ') && (Start == 0))
+		{
+			Start = i;
+		}
+		else if (a_Data[i] == '\n')
+		{
+			if ((i == 0) || (a_Data[i - 1] != '\r'))
+			{
+				// There wasn't a CR before this LF
+				return AString::npos;
+			}
+			AString Value(a_Data, 0, i - Start - 1);
+			AddHeader(a_Key, Value);
+			return i + 1;
+		}
+	}
+	// LF not found, how? We found it at the header end (CRLFCRLF)
+	ASSERT(!"LF not found, wtf?");
+	return AString::npos;
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHTTPResponse:
+
+cHTTPResponse::cHTTPResponse(void) :
+	super(mkResponse)
+{
+}
+
+
+
+
+
+void cHTTPResponse::AppendToData(AString & a_DataStream) const
+{
+	a_DataStream.append("200 OK\r\nTransfer-Encoding: chunked\r\nContent-Type: ");
+	a_DataStream.append(m_ContentType);
+	a_DataStream.append("\r\n");
+	for (cNameValueMap::const_iterator itr = m_Headers.begin(), end = m_Headers.end(); itr != end; ++itr)
+	{
+		if ((itr->first == "Content-Type") || (itr->first == "Content-Length"))
+		{
+			continue;
+		}
+		a_DataStream.append(itr->first);
+		a_DataStream.append(": ");
+		a_DataStream.append(itr->second);
+		a_DataStream.append("\r\n");
+	}  // for itr - m_Headers[]
+	a_DataStream.append("\r\n");
+}
+
+
+
+
diff --git a/source/HTTPServer/HTTPMessage.h b/source/HTTPServer/HTTPMessage.h
new file mode 100644
index 000000000..a3c4f96d1
--- /dev/null
+++ b/source/HTTPServer/HTTPMessage.h
@@ -0,0 +1,121 @@
+
+// HTTPMessage.h
+
+// Declares the cHTTPMessage class representing the common ancestor for HTTP request and response classes
+
+
+
+
+
+#pragma once
+
+
+
+
+
+class cHTTPMessage
+{
+public:
+	enum
+	{
+		HTTP_OK = 200,
+		HTTP_BAD_REQUEST = 400,
+	} ;
+
+	enum eKind
+	{
+		mkRequest,
+		mkResponse,
+	} ;
+	
+	cHTTPMessage(eKind a_Kind);
+
+	/// Adds a header into the internal map of headers. Recognizes special headers: Content-Type and Content-Length
+	void AddHeader(const AString & a_Key, const AString & a_Value);
+	
+	void SetContentType  (const AString & a_ContentType) { m_ContentType   = a_ContentType; }
+	void SetContentLength(int a_ContentLength)           { m_ContentLength = a_ContentLength; }
+	
+	const AString & GetContentType  (void) const { return m_ContentType; }
+	int             GetContentLength(void) const { return m_ContentLength; }
+
+protected:
+	typedef std::map<AString, AString> cNameValueMap;
+	
+	eKind m_Kind;
+	
+	cNameValueMap m_Headers;
+
+	/// Type of the content; parsed by AddHeader(), set directly by SetContentLength()
+	AString m_ContentType;
+
+	/// Length of the content that is to be received. -1 when the object is created, parsed by AddHeader() or set directly by SetContentLength()
+	int m_ContentLength;
+} ;
+
+
+
+
+
+class cHTTPRequest :
+	public cHTTPMessage
+{
+	typedef cHTTPMessage super;
+	
+public:
+	cHTTPRequest(void);
+	
+	/// Parses the headers information from the received data in the specified string of incoming data. Returns true if successful.
+	bool ParseHeaders(const char * a_IncomingData, size_t a_idxEnd);
+	
+	/// Returns true if the request did contain a Content-Length header
+	bool HasReceivedContentLength(void) const { return (m_ContentLength >= 0); }
+	
+protected:
+	/// Method of the request (GET / PUT / POST / ...)
+	AString m_Method;
+	
+	/// Full URL of the request
+	AString m_URL;
+	
+	/// Number of bytes that remain to read for the complete body of the message to be received
+	int m_BodyRemaining;
+
+	/** Parses the RequestLine out of a_Data, up to index a_IdxEnd
+	Returns the index to the next line, or npos if invalid request
+	*/
+	size_t ParseRequestLine(const char * a_Data, size_t a_IdxEnd);
+	
+	/** Parses one header field out of a_Data, up to offset a_IdxEnd.
+	Returns the index to the next line (relative to a_Data), or npos if invalid request.
+	a_Key is set to the key that was parsed (used for multi-line headers)
+	*/
+	size_t ParseHeaderField(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
+	
+	/** Parses one header field that is known to be a continuation of previous header.
+	Returns the index to the next line, or npos if invalid request.
+	*/
+	size_t ParseHeaderFieldContinuation(const char * a_Data, size_t a_IdxEnd, AString & a_Key);
+} ;
+
+
+
+
+
+class cHTTPResponse :
+	public cHTTPMessage
+{
+	typedef cHTTPMessage super;
+
+public:
+	cHTTPResponse(void);
+	
+	/** Appends the response to the specified datastream - response line and headers.
+	The body will be sent later directly through cConnection::Send()
+	*/
+	void AppendToData(AString & a_DataStream) const;
+} ;
+
+
+
+
diff --git a/source/HTTPServer/HTTPServer.cpp b/source/HTTPServer/HTTPServer.cpp
new file mode 100644
index 000000000..e68032bc2
--- /dev/null
+++ b/source/HTTPServer/HTTPServer.cpp
@@ -0,0 +1,267 @@
+
+// HTTPServer.cpp
+
+// Implements the cHTTPServer class representing a HTTP webserver that uses cListenThread and cSocketThreads for processing
+
+#include "Globals.h"
+#include "HTTPServer.h"
+#include "HTTPMessage.h"
+
+
+
+
+
+// Disable MSVC warnings:
+#if defined(_MSC_VER)
+	#pragma warning(push)
+	#pragma warning(disable:4355)  // 'this' : used in base member initializer list
+#endif
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHTTPConnection:
+
+cHTTPConnection::cHTTPConnection(cHTTPServer & a_HTTPServer) :
+	m_HTTPServer(a_HTTPServer),
+	m_State(wcsRecvHeaders),
+	m_CurrentRequest(NULL)
+{
+}
+
+
+
+
+void cHTTPConnection::SendStatusAndReason(int a_StatusCode, const AString & a_Response)
+{
+	AppendPrintf(m_OutgoingData, "%d %s\r\n\r\n", a_StatusCode, a_Response.c_str());
+}
+
+
+
+
+
+void cHTTPConnection::Send(const cHTTPResponse & a_Response)
+{
+	ASSERT(m_State = wcsRecvIdle);
+	a_Response.AppendToData(m_OutgoingData);
+	m_State = wcsSendingResp;
+}
+
+
+
+
+
+void cHTTPConnection::Send(const void * a_Data, int a_Size)
+{
+	ASSERT(m_State == wcsSendingResp);
+	AppendPrintf(m_OutgoingData, "%x\r\n", a_Size);
+	m_OutgoingData.append((const char *)a_Data, a_Size);
+}
+
+
+
+
+
+void cHTTPConnection::FinishResponse(void)
+{
+	ASSERT(m_State == wcsSendingResp);
+	m_OutgoingData.append("0\r\n");
+	m_State = wcsRecvHeaders;
+}
+
+
+
+
+
+void cHTTPConnection::DataReceived(const char * a_Data, int a_Size)
+{
+	switch (m_State)
+	{
+		case wcsRecvHeaders:
+		{
+			ASSERT(m_CurrentRequest == NULL);
+
+			// Start searching 3 chars from the end of the already received data, if available:
+			size_t SearchStart = m_IncomingHeaderData.size();
+			SearchStart = (SearchStart > 3) ? SearchStart - 3 : 0;
+			
+			m_IncomingHeaderData.append(a_Data, a_Size);
+			
+			// Parse the header, if it is complete:
+			size_t idxEnd = m_IncomingHeaderData.find("\r\n\r\n", SearchStart);
+			if (idxEnd == AString::npos)
+			{
+				return;
+			}
+			m_CurrentRequest = new cHTTPRequest;
+			if (!m_CurrentRequest->ParseHeaders(m_IncomingHeaderData.c_str(), idxEnd + 2))
+			{
+				delete m_CurrentRequest;
+				m_CurrentRequest = NULL;
+				m_State = wcsInvalid;
+				m_HTTPServer.CloseConnection(*this);
+				return;
+			}
+			m_State = wcsRecvBody;
+			m_HTTPServer.NewRequest(*this, *m_CurrentRequest);
+			
+			// Process the rest of the incoming data into the request body:
+			if (m_IncomingHeaderData.size() > idxEnd + 4)
+			{
+				m_IncomingHeaderData.erase(0, idxEnd + 4);
+				DataReceived(m_IncomingHeaderData.c_str(), m_IncomingHeaderData.size());
+			}
+			break;
+		}
+
+		case wcsRecvBody:
+		{
+			ASSERT(m_CurrentRequest != NULL);
+			// TODO: Receive the body, and the next request (If HTTP/1.1 keepalive)
+			break;
+		}
+
+		default:
+		{
+			// TODO: Should we be receiving data in this state?
+			break;
+		}
+	}
+}
+
+
+
+
+
+void cHTTPConnection::GetOutgoingData(AString & a_Data)
+{
+	std::swap(a_Data, m_OutgoingData);
+}
+
+
+
+
+
+void cHTTPConnection::SocketClosed(void)
+{
+	if (m_CurrentRequest != NULL)
+	{
+		m_HTTPServer.RequestFinished(*this, *m_CurrentRequest);
+	}
+}
+
+
+
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// cHTTPServer:
+
+cHTTPServer::cHTTPServer(void) :
+	m_ListenThreadIPv4(*this, cSocket::IPv4, "WebServer IPv4"),
+	m_ListenThreadIPv6(*this, cSocket::IPv6, "WebServer IPv6"),
+	m_SocketThreads()
+{
+}
+
+
+
+
+
+bool cHTTPServer::Initialize(cIniFile & a_IniFile)
+{
+	if (!a_IniFile.GetValueSetB("WebAdmin", "Enabled", false))
+	{
+		// The WebAdmin is disabled
+		return true;
+	}
+	bool HasAnyPort;
+	HasAnyPort = m_ListenThreadIPv4.Initialize(a_IniFile.GetValueSet("WebAdmin", "Port", "8081"));
+	HasAnyPort = m_ListenThreadIPv6.Initialize(a_IniFile.GetValueSet("WebAdmin", "PortsIPv6", "8082, 3300")) || HasAnyPort;
+	if (!HasAnyPort)
+	{
+		LOG("WebAdmin is disabled");
+		return false;
+	}
+	if (!m_ListenThreadIPv4.Start())
+	{
+		return false;
+	}
+	if (!m_ListenThreadIPv6.Start())
+	{
+		m_ListenThreadIPv4.Stop();
+		return false;
+	}
+	return true;
+}
+
+
+
+
+
+void cHTTPServer::OnConnectionAccepted(cSocket & a_Socket)
+{
+	cHTTPConnection * Connection = new cHTTPConnection(*this);
+	m_SocketThreads.AddClient(a_Socket, Connection);
+	cCSLock Lock(m_CSConnections);
+	m_Connections.push_back(Connection);
+}
+
+
+
+
+
+void cHTTPServer::CloseConnection(cHTTPConnection & a_Connection)
+{
+	m_SocketThreads.RemoveClient(&a_Connection);
+	cCSLock Lock(m_CSConnections);
+	for (cHTTPConnections::iterator itr = m_Connections.begin(), end = m_Connections.end(); itr != end; ++itr)
+	{
+		if (*itr == &a_Connection)
+		{
+			m_Connections.erase(itr);
+			break;
+		}
+	}
+}
+
+
+
+
+
+void cHTTPServer::NewRequest(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
+{
+	// TODO
+}
+
+
+
+
+
+void cHTTPServer::RequestBody(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
+{
+	// TODO
+}
+
+
+
+
+
+void cHTTPServer::RequestFinished(cHTTPConnection & a_Connection, cHTTPRequest & a_Request)
+{
+	// TODO
+	
+	// DEBUG: Send a debug response:
+	cHTTPResponse Resp;
+	Resp.SetContentType("text/plain");
+	a_Connection.Send(Resp);
+	a_Connection.Send("Hello");
+	a_Connection.FinishResponse();
+}
+
+
+
+
diff --git a/source/HTTPServer/HTTPServer.h b/source/HTTPServer/HTTPServer.h
new file mode 100644
index 000000000..9287a79e8
--- /dev/null
+++ b/source/HTTPServer/HTTPServer.h
@@ -0,0 +1,135 @@
+
+// HTTPServer.h
+
+// Declares the cHTTPServer class representing a HTTP webserver that uses cListenThread and cSocketThreads for processing
+
+
+
+
+
+#pragma once
+
+#include "../OSSupport/ListenThread.h"
+#include "../OSSupport/SocketThreads.h"
+#include "../../iniFile/iniFile.h"
+
+
+
+
+
+// fwd:
+class cHTTPServer;
+class cHTTPMessage;
+class cHTTPRequest;
+class cHTTPResponse;
+
+
+
+
+
+class cHTTPConnection :
+	public cSocketThreads::cCallback
+{
+public:
+	
+	enum eState
+	{
+		wcsRecvHeaders,  ///< Receiving request headers (m_CurrentRequest == NULL)
+		wcsRecvBody,     ///< Receiving request body    (m_CurrentRequest is valid)
+		wcsRecvIdle,     ///< Has received the entire body, waiting to send the response (m_CurrentRequest == NULL)
+		wcsSendingResp,  ///< Sending response body     (m_CurrentRequest == NULL)
+		wcsInvalid,      ///< The request was malformed, the connection is closing
+	} ;
+	
+	cHTTPConnection(cHTTPServer & a_HTTPServer);
+	
+	/// Sends HTTP status code together with a_Reason (used for HTTP errors)
+	void SendStatusAndReason(int a_StatusCode, const AString & a_Reason);
+	
+	/// Sends the headers contained in a_Response
+	void Send(const cHTTPResponse & a_Response);
+	
+	/// Sends the data as the response (may be called multiple times)
+	void Send(const void * a_Data, int a_Size);
+
+	/// Sends the data as the response (may be called multiple times)
+	void Send(const AString & a_Data) { Send(a_Data.data(), a_Data.size()); }
+	
+	/// Finishes sending current response, gets ready for receiving another request (HTTP 1.1 keepalive)
+	void FinishResponse(void);
+	
+protected:
+	typedef std::map<AString, AString> cNameValueMap;
+	
+	/// The parent webserver that is to be notified of events on this connection
+	cHTTPServer & m_HTTPServer;
+	
+	/// All the incoming data until the entire request header is parsed
+	AString m_IncomingHeaderData;
+	
+	/// Status in which the request currently is
+	eState m_State;
+	
+	/// Data that is queued for sending, once the socket becomes writable
+	AString m_OutgoingData;
+	
+	/// The request being currently received (valid only between having parsed the headers and finishing receiving the body)
+	cHTTPRequest * m_CurrentRequest;
+	
+	
+	/// Parses the header in m_IncomingData until the specified end mark
+	void ParseHeader(size_t a_IdxEnd);
+	
+	/// Sends the response status and headers. Transition from wrsRecvBody to wrsSendingResp.
+	void SendRespHeaders(void);
+	
+	// cSocketThreads::cCallback overrides:
+	virtual void DataReceived   (const char * a_Data, int a_Size) override;  // Data is received from the client
+	virtual void GetOutgoingData(AString & a_Data) override;  // Data can be sent to client
+	virtual void SocketClosed   (void) override;  // The socket has been closed for any reason
+} ;
+
+typedef std::vector<cHTTPConnection *> cHTTPConnections;
+
+
+
+
+class cHTTPServer :
+	public cListenThread::cCallback
+{
+public:
+	cHTTPServer(void);
+	
+	bool Initialize(cIniFile & a_IniFile);
+	
+protected:
+	friend class cHTTPConnection;
+	
+	cListenThread m_ListenThreadIPv4;
+	cListenThread m_ListenThreadIPv6;
+	
+	cSocketThreads m_SocketThreads;
+
+	cCriticalSection m_CSConnections;
+	cHTTPConnections m_Connections;    ///< All the connections that are currently being serviced
+
+	// cListenThread::cCallback overrides:
+	virtual void OnConnectionAccepted(cSocket & a_Socket) override;
+	
+	/// Called by cHTTPConnection to close the connection (presumably due to an error)
+	void CloseConnection(cHTTPConnection & a_Connection);
+	
+	/// Called by cHTTPConnection when it finishes parsing the request header
+	void NewRequest(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
+	
+	/// Called by cHTTPConenction when it receives more data for the request body
+	void RequestBody(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
+	
+	/// Called by cHTTPConnection when it detects that the request has finished (all of its body has been received)
+	void RequestFinished(cHTTPConnection & a_Connection, cHTTPRequest & a_Request);
+} ;
+
+
+
+
+