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384 lines (330 loc) · 10 KB
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/*
* Copyright (C) 2012 Yee Young Han <websearch@naver.com> (http://blog.naver.com/websearch)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "HttpStack.h"
#include "HttpStatusCode.h"
#include "Log.h"
#include "Base64.h"
#include "MemoryDebug.h"
const EVP_MD * CHttpStack::m_psttMd = NULL;
CHttpStack::CHttpStack() : m_pclsCallBack(NULL)
{
if( m_psttMd == NULL )
{
OpenSSL_add_all_digests();
m_psttMd = EVP_get_digestbyname( "sha1" );
}
}
CHttpStack::~CHttpStack()
{
}
/**
* @ingroup HttpStack
* @brief HTTP 서버를 시작한다.
* @param pclsSetup 설정 객체
* @param pclsCallBack callback 객체
* @returns 성공하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool CHttpStack::Start( CTcpStackSetup * pclsSetup, IHttpStackCallBack * pclsCallBack )
{
if( pclsCallBack == NULL )
{
CLog::Print( LOG_ERROR, "%s IHttpStackCallBack is NULL", __FUNCTION__ );
return false;
}
m_pclsCallBack = pclsCallBack;
return m_clsTcpStack.Start( pclsSetup, this );
}
/**
* @ingroup HttpStack
* @brief
* @returns 성공하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool CHttpStack::Stop( )
{
return m_clsTcpStack.Stop();
}
/**
* @ingroup HttpStack
* @brief WebSocket 클라이언트로 데이터를 전송한다.
* @param pszClientIp WebSocket 클라이언트 IP 주소
* @param iClientPort WebSocket 클라이언트 포트 번호
* @param pszData WebSocket 으로 전송할 payload 데이터
* @param iDataLen WebSocket 으로 전송할 payload 데이터 길이
* @returns 성공하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool CHttpStack::SendWebSocketPacket( const char * pszClientIp, int iClientPort, const char * pszData, int iDataLen )
{
int iPacketLen = 0;
if( iDataLen > 65536 )
{
iPacketLen = 2 + 8 + iDataLen;
}
else if( iDataLen > 125 )
{
iPacketLen = 2 + 2 + iDataLen;
}
else
{
iPacketLen = 2 + iDataLen;
}
char * pszPacket = (char *)malloc( iPacketLen );
if( pszPacket == NULL )
{
CLog::Print( LOG_ERROR, "%s malloc error", __FUNCTION__ );
return false;
}
pszPacket[0] = (uint8_t)0x81;
int iPayLoadPos = 2;
if( iDataLen > 65536 )
{
pszPacket[1] = 127;
uint64_t lDataLen = iDataLen;
lDataLen = htonll( lDataLen );
memcpy( pszPacket + 2, &lDataLen, 8 );
iPayLoadPos = 2 + 8;
}
else if( iDataLen > 125 )
{
pszPacket[1] = 126;
uint16_t sDataLen = iDataLen;
sDataLen = htons( sDataLen );
memcpy( pszPacket + 2, &sDataLen, 2 );
iPayLoadPos = 2 + 2;
}
else
{
pszPacket[1] = iDataLen;
}
memcpy( pszPacket + iPayLoadPos, pszData, iDataLen );
bool bRes = m_clsTcpStack.Send( pszClientIp, iClientPort, pszPacket, iPacketLen, false );
free( pszPacket );
return bRes;
}
/**
* @ingroup HttpStack
* @brief HTTP 클라이언트가 연결 이벤트 핸들러
* @param pclsSessionInfo 세션 정보
* @return HTTP 클라이언트 연결을 허용하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool CHttpStack::InComingConnected( CTcpSessionInfo * pclsSessionInfo )
{
return true;
}
/**
* @ingroup HttpStack
* @brief HTTP 클라이언트 세션이 종료 이벤트 핸들러
* @param pclsSessionInfo 세션 정보
*/
void CHttpStack::SessionClosed( CTcpSessionInfo * pclsSessionInfo )
{
if( pclsSessionInfo->m_pclsApp )
{
CHttpStackSession * pclsApp = (CHttpStackSession *)pclsSessionInfo->m_pclsApp;
if( pclsApp->m_bWebSocket )
{
m_pclsCallBack->WebSocketClosed( pclsSessionInfo->m_strIp.c_str(), pclsSessionInfo->m_iPort );
}
}
}
/**
* @ingroup HttpStack
* @brief TCP 패킷 수신 이벤트 핸들러
* @param pszPacket 수신 패킷
* @param iPacketLen 수신 패킷 길이
* @param pclsSessionInfo 세션 정보
* @returns TCP 세션을 유지하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool CHttpStack::RecvPacket( char * pszPacket, int iPacketLen, CTcpSessionInfo * pclsSessionInfo )
{
if( pclsSessionInfo->m_pclsApp == NULL )
{
pclsSessionInfo->m_pclsApp = new CHttpStackSession();
if( pclsSessionInfo->m_pclsApp == NULL )
{
CLog::Print( LOG_ERROR, "%s new error", __FUNCTION__ );
return false;
}
}
CHttpStackSession * pclsApp = (CHttpStackSession *)pclsSessionInfo->m_pclsApp;
if( pclsApp->m_bWebSocket )
{
// WebSocket 프로토콜
CWebSocketPacketHeader clsHeader;
std::string strData;
pclsApp->m_clsWsPacket.AddPacket( pszPacket, iPacketLen );
while( pclsApp->m_clsWsPacket.GetData( clsHeader, strData ) )
{
if( clsHeader.m_iOpCode == 1 || clsHeader.m_iOpCode == 2 )
{
if( m_pclsCallBack->WebSocketData( pclsSessionInfo->m_strIp.c_str(), pclsSessionInfo->m_iPort, strData, pclsApp ) == false )
{
return false;
}
}
else if( clsHeader.m_iOpCode == 8 )
{
if( pclsSessionInfo->Send( pszPacket, iPacketLen ) == false )
{
CLog::Print( LOG_ERROR, "%s Send error", __FUNCTION__ );
return false;
}
}
else if( clsHeader.m_iOpCode == 9 )
{
char szPacket[2];
memset( szPacket, 0, sizeof(szPacket) );
szPacket[0] = (uint8_t)0xFA;
if( pclsSessionInfo->Send( szPacket, 2 ) == false )
{
CLog::Print( LOG_ERROR, "%s Send error", __FUNCTION__ );
return false;
}
}
}
}
else
{
// HTTP 프로토콜
if( pclsApp->m_clsHttpPacket.AddPacket( pszPacket, iPacketLen ) == false )
{
CLog::Print( LOG_ERROR, "%s m_clsPacket.AddPacket error", __FUNCTION__ );
return false;
}
if( pclsApp->m_clsHttpPacket.IsCompleted() )
{
CHttpMessage * pclsRecv = pclsApp->m_clsHttpPacket.GetHttpMessage();
if( pclsRecv->IsRequest() )
{
CHttpMessage clsSend;
CHttpHeader * pclsHeader;
bool bClose = false;
pclsHeader = pclsRecv->GetHeader( "User-Agent" );
if( pclsHeader && strcmp( pclsApp->m_strUserAgent.c_str(), pclsHeader->m_strValue.c_str() ) )
{
pclsApp->m_strUserAgent = pclsHeader->m_strValue;
}
pclsHeader = pclsRecv->GetHeader( "Upgrade" );
if( pclsHeader && !strcmp( pclsHeader->m_strValue.c_str(), "websocket" ) )
{
// WebSocket 을 위한 HTTP 요청이면 응용으로 callback 호출하지 않고 응답 메시지를 전송한다.
if( MakeWebSocketResponse( pclsRecv, &clsSend ) == false )
{
return false;
}
pclsApp->m_bWebSocket = true;
}
else
{
pclsHeader = pclsRecv->GetHeader( "Connection" );
if( pclsHeader == NULL || !strcmp( pclsHeader->m_strValue.c_str(), "close" ) )
{
bClose = true;
}
if( m_pclsCallBack->RecvHttpRequest( pclsRecv, &clsSend ) == false )
{
CLog::Print( LOG_ERROR, "%s RecvHttpRequest error", __FUNCTION__ );
return false;
}
}
int iNewBufLen = 8192 + clsSend.m_strBody.length();
char * pszBuf = (char *)malloc( iNewBufLen );
if( pszBuf == NULL )
{
CLog::Print( LOG_ERROR, "%s malloc error", __FUNCTION__ );
return false;
}
int iBufLen = clsSend.ToString( pszBuf, iNewBufLen );
if( iBufLen == -1 )
{
CLog::Print( LOG_ERROR, "%s ToString error", __FUNCTION__ );
free( pszBuf );
return false;
}
if( pclsSessionInfo->Send( pszBuf, iBufLen ) == false )
{
CLog::Print( LOG_ERROR, "%s Send error", __FUNCTION__ );
free( pszBuf );
return false;
}
free( pszBuf );
if( bClose )
{
return false;
}
if( pclsApp->m_bWebSocket )
{
m_pclsCallBack->WebSocketConnected( pclsSessionInfo->m_strIp.c_str(), pclsSessionInfo->m_iPort );
}
}
else
{
CLog::Print( LOG_ERROR, "%s http request error", __FUNCTION__ );
return false;
}
}
}
return true;
}
/**
* @ingroup HttpStack
* @brief WebSocket 연결을 위한 HTTP 요청 메시지에 대한 HTTP 응답 메시지를 생성한다.
* @param pclsRecv 수신된 HTTP 요청 메시지
* @param pclsSend 전송할 HTTP 응답 메시지
* @returns 성공하면 true 를 리턴하고 실패하면 false 를 리턴한다.
*/
bool CHttpStack::MakeWebSocketResponse( CHttpMessage * pclsRecv, CHttpMessage * pclsSend )
{
CHttpHeader * pclsHeader = pclsRecv->GetHeader( "Sec-WebSocket-Key" );
if( pclsHeader == NULL )
{
CLog::Print( LOG_ERROR, "%s Sec-WebSocket-Key is not found", __FUNCTION__ );
return false;
}
std::string strKey = pclsHeader->m_strValue;
pclsSend->m_iStatusCode = HTTP_SWITCHING_PROTOCOLS;
pclsSend->AddHeader( "Upgrade", "websocket" );
pclsSend->AddHeader( "Connection", "Upgrade" );
uint8_t szDigest[EVP_MAX_MD_SIZE];
char szOutput[EVP_MAX_MD_SIZE*2+1];
uint32_t iDigestLen = 0;
memset( szDigest, 0, sizeof(szDigest) );
memset( szOutput, 0, sizeof(szOutput) );
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
EVP_MD_CTX * psttCtx = EVP_MD_CTX_new();
if( psttCtx )
{
EVP_DigestInit_ex( psttCtx, m_psttMd, NULL );
EVP_DigestUpdate( psttCtx, strKey.c_str(), strKey.length() );
EVP_DigestUpdate( psttCtx, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 36 );
EVP_DigestFinal( psttCtx, szDigest, &iDigestLen );
EVP_MD_CTX_free( psttCtx );
}
#else
EVP_MD_CTX sttCtx;
EVP_DigestInit( &sttCtx, m_psttMd );
EVP_DigestUpdate( &sttCtx, strKey.c_str(), strKey.length() );
EVP_DigestUpdate( &sttCtx, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 36 );
EVP_DigestFinal( &sttCtx, szDigest, &iDigestLen );
#endif
if( iDigestLen > 0 )
{
Base64Encode( (char *)szDigest, iDigestLen, szOutput, sizeof(szOutput) );
}
pclsSend->AddHeader( "Sec-WebSocket-Accept", szOutput );
return true;
}
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