707 lines
19 KiB
C++
707 lines
19 KiB
C++
/******************************************************************************
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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HttpContext.cpp
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Abstract:
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This file contains the implementation of the MPCHttpContext class,
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which handles the interface with IIS.
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Revision History:
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Davide Massarenti (Dmassare) 04/20/99
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created
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******************************************************************************/
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#include "stdafx.h"
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#define BUFFER_SIZE_TMP (64)
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static const char szStatus [] = "200 OK";
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static const char szNewLine[] = "\r\n";
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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//
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// Static functions.
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//
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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static void SupportAddHeader( /*[in/out]*/ MPC::string& szHeaders ,
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/*[in] */ const char* szHeaderName ,
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/*[in] */ const char* szHeaderValue )
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{
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__ULT_FUNC_ENTRY("SupportAddHeader");
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szHeaders.append( szHeaderName );
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szHeaders.append( ": " );
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szHeaders.append( szHeaderValue );
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szHeaders.append( szNewLine );
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}
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static void SupportAddHeader( /*[in/out]*/ MPC::string& szHeaders ,
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/*[in] */ const char* szHeaderName ,
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/*[in] */ DWORD dwHeaderValue )
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{
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__ULT_FUNC_ENTRY("SupportAddHeader");
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char rgBuf[BUFFER_SIZE_TMP];
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sprintf( rgBuf, "%lu", dwHeaderValue );
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SupportAddHeader( szHeaders, szHeaderName, rgBuf );
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}
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static void SupportEndHeaders( /*[in/out]*/ MPC::string& szHeaders )
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{
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__ULT_FUNC_ENTRY("SupportEndHeaders");
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szHeaders.append( szNewLine );
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}
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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// Construction/Destruction
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//
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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MPCHttpContext::MPCHttpContext() : m_hsInput (g_Heap),
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m_hsOutput(g_Heap)
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::MPCHttpContext");
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m_pECB = NULL;
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m_mpcsServer = NULL;
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m_dwSkippedInput = 0;
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m_fRequestProcessed = FALSE;
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m_fKeepConnection = TRUE;
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m_fAsync = FALSE;
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m_FSMstate = FSM_REGISTER;
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m_IOstate = IO_IDLE;
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#ifdef DEBUG
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m_Debug_NO_RESPONSE_TO_OPEN = false;
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m_Debug_NO_RESPONSE_TO_WRITE = false;
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m_Debug_RESPONSE_TO_OPEN = false;
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m_Debug_RESPONSE_TO_OPEN_response = 0;
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m_Debug_RESPONSE_TO_OPEN_position = -1;
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m_Debug_RESPONSE_TO_OPEN_protocol = UPLOAD_LIBRARY_PROTOCOL_VERSION_SRV;
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m_Debug_RESPONSE_TO_WRITE = false;
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m_Debug_RESPONSE_TO_WRITE_response = 0;
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m_Debug_RESPONSE_TO_WRITE_position = -1;
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m_Debug_RESPONSE_TO_WRITE_protocol = UPLOAD_LIBRARY_PROTOCOL_VERSION_SRV;
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m_Debug_RANDOM_POINTER_ERROR = false;
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m_Debug_RANDOM_POINTER_ERROR_pos_low = 0;
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m_Debug_RANDOM_POINTER_ERROR_pos_high = -1;
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m_Debug_FIXED_POINTER_ERROR = false;
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m_Debug_FIXED_POINTER_ERROR_pos = 0;
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#endif
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}
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MPCHttpContext::~MPCHttpContext()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::~MPCHttpContext");
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if(m_mpcsServer) delete m_mpcsServer;
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if(m_fAsync && m_pECB)
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{
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//
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// Close session.
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//
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m_pECB->ServerSupportFunction( m_pECB->ConnID ,
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HSE_REQ_DONE_WITH_SESSION ,
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NULL ,
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NULL ,
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NULL );
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}
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}
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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// Callbacks
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//
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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VOID WINAPI MPCHttpContext::IOCompletion( /*[in]*/ EXTENSION_CONTROL_BLOCK* pECB ,
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/*[in]*/ PVOID pContext ,
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/*[in]*/ DWORD cbIO ,
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/*[in]*/ DWORD dwError )
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::IOCompletion");
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MPCHttpContext* ptr = NULL;
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try
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{
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ptr = reinterpret_cast<MPCHttpContext*>(pContext);
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ptr->m_pECB = pECB;
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if(dwError != ERROR_SUCCESS)
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{
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delete ptr; ptr = NULL;
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}
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else
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{
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switch( ptr->m_IOstate )
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{
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case IO_IDLE:
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break;
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case IO_READING:
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//
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// If the request has already been processed, simply count the number of bytes received.
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//
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if(ptr->m_fRequestProcessed)
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{
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ptr->m_dwSkippedInput += cbIO;
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}
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else
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{
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ptr->m_hsInput.write( ptr->m_rgBuffer, cbIO );
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}
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//
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// If this is the last request (cbIO==0) or the number of bytes skipped is equal to the number of missing bytes,
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// proceed to the next phase.
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//
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if(cbIO == 0 || ptr->m_dwSkippedInput == ptr->m_hsInput.GetAvailableForWrite())
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{
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ptr->m_IOstate = IO_IDLE;
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}
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else
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{
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if(ptr->Fsm_Process() == HSE_STATUS_ERROR)
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{
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delete ptr; ptr = NULL;
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}
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else
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{
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ptr->AsyncRead();
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}
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}
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break;
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case IO_WRITING:
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if(cbIO == 0 || ptr->m_hsOutput.IsEOR())
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{
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ptr->m_IOstate = IO_IDLE;
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}
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else
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{
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ptr->AsyncWrite();
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}
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break;
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}
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if(ptr->m_IOstate == IO_IDLE)
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{
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ptr->AdvanceFSM();
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}
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}
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}
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catch(...)
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{
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__ULT_TRACE_ERROR( UPLOADLIBID, "Upload Server raised an exception. Gracefully exiting..." );
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(void)g_NTEvents.LogEvent( EVENTLOG_ERROR_TYPE, PCHUL_ERR_EXCEPTION,
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L"" , // %1 = SERVER
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L"IOCompletion", // %2 = CLIENT
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NULL );
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if(ptr)
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{
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delete ptr; ptr = NULL;
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}
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}
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}
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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// Protected Methods.
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//
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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DWORD MPCHttpContext::AsyncRead()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::AsyncRead");
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DWORD dwRes = HSE_STATUS_SUCCESS;
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DWORD dwSize = m_hsInput.GetAvailableForWrite();
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//
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// If not all the data has been read, ask for async I/O operation.
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//
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if(dwSize)
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{
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DWORD dwTmp = HSE_IO_ASYNC;
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m_fAsync = TRUE;
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m_IOstate = IO_READING;
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dwSize = min( dwSize, sizeof(m_rgBuffer) );
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if(!m_pECB->ServerSupportFunction( m_pECB->ConnID ,
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HSE_REQ_ASYNC_READ_CLIENT,
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m_rgBuffer ,
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&dwSize ,
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&dwTmp ))
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{
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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else
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{
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dwRes = HSE_STATUS_PENDING; __ULT_FUNC_LEAVE;
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}
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}
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::AsyncWrite()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::AsyncWrite");
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DWORD dwRes = HSE_STATUS_SUCCESS;
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DWORD dwSize = m_hsOutput.GetAvailableForRead();
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//
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// If not all the data has been read, ask for async I/O operation.
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//
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if(dwSize)
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{
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m_fAsync = TRUE;
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m_IOstate = IO_WRITING;
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dwSize = min( dwSize, sizeof(m_rgBuffer) );
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if(FAILED(m_hsOutput.read( m_rgBuffer, dwSize )))
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{
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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if(m_pECB->WriteClient( m_pECB->ConnID, m_rgBuffer, &dwSize, HSE_IO_ASYNC ) == FALSE)
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{
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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dwRes = HSE_STATUS_PENDING; __ULT_FUNC_LEAVE;
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}
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::AdvanceFSM()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::AdvanceFSM");
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DWORD dwRes = HSE_STATUS_SUCCESS;
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bool fClean = false;
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while(dwRes == HSE_STATUS_SUCCESS)
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{
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switch(m_FSMstate)
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{
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case FSM_REGISTER: m_FSMstate = FSM_INPUT ; dwRes = Fsm_Register (); break; // Register IO callback.
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case FSM_INPUT : m_FSMstate = FSM_PROCESS; dwRes = Fsm_ReceiveInput(); break; // Read all the input.
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case FSM_PROCESS : m_FSMstate = FSM_OUTPUT ; dwRes = Fsm_Process (); break; // Process request.
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case FSM_OUTPUT : m_FSMstate = FSM_DELETE ; dwRes = Fsm_SendOutput (); break; // Send output.
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case FSM_DELETE : fClean = true; __ULT_FUNC_LEAVE; // Delete the request object.
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}
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}
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if(dwRes != HSE_STATUS_SUCCESS &&
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dwRes != HSE_STATUS_PENDING )
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{
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fClean = true;
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}
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__ULT_FUNC_CLEANUP;
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if(fClean) delete this;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::Fsm_Register()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::Fsm_Register");
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DWORD dwRes = HSE_STATUS_SUCCESS;
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if(!m_pECB->ServerSupportFunction( m_pECB->ConnID ,
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HSE_REQ_IO_COMPLETION,
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IOCompletion ,
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NULL ,
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(LPDWORD)this ))
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{
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::Fsm_ReceiveInput()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::Fsm_ReceiveInput");
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DWORD dwRes = HSE_STATUS_SUCCESS;
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//
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// Alloc a buffer large enough to hold the request data.
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//
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if(FAILED(m_hsInput.SetSize( m_pECB->cbTotalBytes ))) { dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE; }
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if(FAILED(m_hsInput.write ( m_pECB->lpbData, m_pECB->cbAvailable ))) { dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE; }
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dwRes = AsyncRead();
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::Fsm_Process()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::Fsm_Process");
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HRESULT hr;
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DWORD dwRes = HSE_STATUS_SUCCESS;
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if(m_fRequestProcessed == TRUE) __ULT_FUNC_LEAVE;
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m_hsInput .Rewind();
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m_hsOutput.Reset ();
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if(FAILED(hr = m_mpcsServer->Process( m_fKeepConnection )))
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{
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if(hr == E_PENDING)
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{
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dwRes = HSE_STATUS_PENDING; __ULT_FUNC_LEAVE;
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}
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m_fRequestProcessed = TRUE;
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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m_fRequestProcessed = TRUE;
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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DWORD MPCHttpContext::Fsm_SendOutput()
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::Fsm_SendOutput");
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HSE_SEND_HEADER_EX_INFO headerInfo;
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MPC::string szHeaders;
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DWORD dwRes;
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//
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// Built headers.
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//
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SupportAddHeader( szHeaders, "Content-Length", m_hsOutput.GetSize() );
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SupportAddHeader( szHeaders, "Content-Type" , "application/uploadlibrary" );
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SupportEndHeaders( szHeaders );
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//
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// Populate HSE_SEND_HEADER_EX_INFO struct.
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//
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headerInfo.pszStatus = szStatus;
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headerInfo.cchStatus = strlen( szStatus );
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headerInfo.pszHeader = szHeaders.c_str();
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headerInfo.cchHeader = szHeaders.length();
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headerInfo.fKeepConn = TRUE;
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//
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// Send response.
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//
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if(!m_pECB->ServerSupportFunction( m_pECB->ConnID ,
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HSE_REQ_SEND_RESPONSE_HEADER_EX ,
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&headerInfo ,
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NULL ,
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NULL ))
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{
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dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
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}
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//
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// Send data, if present.
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//
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dwRes = AsyncWrite();
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__ULT_FUNC_CLEANUP;
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__ULT_FUNC_EXIT(dwRes);
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}
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//
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// Methods.
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//
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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DWORD MPCHttpContext::Init( /*[in]*/ LPEXTENSION_CONTROL_BLOCK pECB )
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{
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__ULT_FUNC_ENTRY("MPCHttpContext::Init");
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DWORD dwRes;
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MPC::wstring szURL;
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MPC::wstring szUser;
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m_pECB = pECB;
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if(FAILED(GetServerVariable( "URL", szURL )))
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{
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szURL = L"DEFAULT";
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}
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if(FAILED(GetServerVariable( "REMOTE_USER", szUser )))
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{
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szUser = L"";
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}
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#ifdef DEBUG
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if(pECB->lpszQueryString)
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{
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static MPC::string constNO_RESPONSE_TO_OPEN ( "NO_RESPONSE_TO_OPEN" );
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static MPC::string constNO_RESPONSE_TO_WRITE( "NO_RESPONSE_TO_WRITE" );
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static MPC::string constRESPONSE_TO_OPEN ( "RESPONSE_TO_OPEN" );
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static MPC::string constRESPONSE_TO_WRITE ( "RESPONSE_TO_WRITE" );
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static MPC::string constRANDOM_POINTER_ERROR( "RANDOM_POINTER_ERROR" );
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static MPC::string constFIXED_POINTER_ERROR ( "FIXED_POINTER_ERROR" );
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std::vector<MPC::string> vec;
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std::vector<MPC::string> vec2;
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std::vector<MPC::string> vec3;
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MPC::NocaseCompare cmp;
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int i;
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MPC::SplitAtDelimiter( vec, pECB->lpszQueryString, "&" );
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for(i=0; i<vec.size(); i++)
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{
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MPC::SplitAtDelimiter( vec2, vec[i].c_str(), "=" );
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switch( vec2.size() )
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{
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default:
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case 2 : MPC::SplitAtDelimiter( vec3, vec2[1].c_str(), "," );
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case 1 : break;
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case 0 : continue;
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}
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MPC::string& name = vec2[0];
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if(cmp( name, constNO_RESPONSE_TO_OPEN ))
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{
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m_Debug_NO_RESPONSE_TO_OPEN = true;
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}
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else if(cmp( name, constNO_RESPONSE_TO_WRITE ))
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{
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m_Debug_NO_RESPONSE_TO_WRITE = true;
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}
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else if(cmp( name, constRESPONSE_TO_OPEN ))
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{
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switch( vec3.size() )
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{
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case 3 : m_Debug_RESPONSE_TO_OPEN_protocol = atol( vec3[2].c_str() );
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case 2 : m_Debug_RESPONSE_TO_OPEN_position = atol( vec3[1].c_str() );
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case 1 : m_Debug_RESPONSE_TO_OPEN_response = atol( vec3[0].c_str() );
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m_Debug_RESPONSE_TO_OPEN = true;
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}
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}
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else if(cmp( name, constRESPONSE_TO_WRITE ))
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{
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switch( vec3.size() )
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{
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case 3 : m_Debug_RESPONSE_TO_WRITE_protocol = atol( vec3[2].c_str() );
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case 2 : m_Debug_RESPONSE_TO_WRITE_position = atol( vec3[1].c_str() );
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|
case 1 : m_Debug_RESPONSE_TO_WRITE_response = atol( vec3[0].c_str() );
|
|
m_Debug_RESPONSE_TO_WRITE = true;
|
|
}
|
|
}
|
|
else if(cmp( name, constRANDOM_POINTER_ERROR ))
|
|
{
|
|
switch( vec3.size() )
|
|
{
|
|
case 2: m_Debug_RANDOM_POINTER_ERROR_pos_high = atol( vec3[1].c_str() );
|
|
m_Debug_RANDOM_POINTER_ERROR_pos_low = atol( vec3[0].c_str() );
|
|
m_Debug_RANDOM_POINTER_ERROR = true;
|
|
}
|
|
}
|
|
else if(cmp( name, constFIXED_POINTER_ERROR ))
|
|
{
|
|
switch( vec3.size() )
|
|
{
|
|
case 1 : m_Debug_FIXED_POINTER_ERROR_pos = atol( vec3[0].c_str() );
|
|
m_Debug_FIXED_POINTER_ERROR = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
m_mpcsServer = new MPCServer( this, szURL.c_str(), szUser.c_str() );
|
|
|
|
if(m_mpcsServer == NULL)
|
|
{
|
|
dwRes = HSE_STATUS_ERROR; __ULT_FUNC_LEAVE;
|
|
}
|
|
|
|
dwRes = AdvanceFSM();
|
|
|
|
|
|
__ULT_FUNC_CLEANUP;
|
|
|
|
__ULT_FUNC_EXIT(dwRes);
|
|
}
|
|
|
|
|
|
HRESULT MPCHttpContext::GetServerVariable( /*[in]*/ LPCSTR szVar, /*[out]*/ MPC::wstring& szValue )
|
|
{
|
|
__ULT_FUNC_ENTRY("MPCHttpContext::GetServerVariable");
|
|
|
|
USES_CONVERSION;
|
|
|
|
HRESULT hr;
|
|
DWORD dwRes;
|
|
LPSTR szData = NULL;
|
|
DWORD dwSize = 0;
|
|
|
|
|
|
m_pECB->GetServerVariable( m_pECB->ConnID, (LPSTR)szVar, NULL, &dwSize );
|
|
|
|
dwRes = ::GetLastError();
|
|
if(dwRes != ERROR_INSUFFICIENT_BUFFER)
|
|
{
|
|
__MPC_SET_WIN32_ERROR_AND_EXIT(hr, dwRes);
|
|
}
|
|
|
|
__MPC_EXIT_IF_ALLOC_FAILS(hr, szData, new CHAR[dwSize+1]);
|
|
|
|
__MPC_EXIT_IF_CALL_RETURNS_FALSE(hr, m_pECB->GetServerVariable( m_pECB->ConnID, (LPSTR)szVar, szData, &dwSize ));
|
|
|
|
szValue = A2W( szData );
|
|
hr = S_OK;
|
|
|
|
|
|
__ULT_FUNC_CLEANUP;
|
|
|
|
if(szData) delete [] szData;
|
|
|
|
__ULT_FUNC_EXIT(hr);
|
|
|
|
}
|
|
HRESULT MPCHttpContext::GetRequestSize( /*[out]*/ DWORD& dwCount )
|
|
{
|
|
__ULT_FUNC_ENTRY("MPCHttpContext::GetRequestSize");
|
|
|
|
HRESULT hr;
|
|
|
|
|
|
dwCount = m_hsInput.GetSize();
|
|
hr = S_OK;
|
|
|
|
|
|
__ULT_FUNC_EXIT(hr);
|
|
}
|
|
|
|
HRESULT MPCHttpContext::CheckDataAvailable( /*[in] */ DWORD dwCount ,
|
|
/*[out]*/ bool& fAvailable )
|
|
{
|
|
__ULT_FUNC_ENTRY("MPCHttpContext::CheckDataAvailable");
|
|
|
|
HRESULT hr;
|
|
|
|
|
|
fAvailable = (m_hsInput.GetAvailableForRead() >= dwCount);
|
|
hr = S_OK;
|
|
|
|
|
|
__ULT_FUNC_EXIT(hr);
|
|
}
|
|
|
|
HRESULT MPCHttpContext::Read( /*[in]*/ void* pBuffer ,
|
|
/*[in]*/ DWORD dwCount )
|
|
{
|
|
__ULT_FUNC_ENTRY("MPCHttpContext::Read");
|
|
|
|
HRESULT hr = m_hsInput.read( pBuffer, dwCount );
|
|
|
|
|
|
__ULT_FUNC_EXIT(hr);
|
|
}
|
|
|
|
HRESULT MPCHttpContext::Write( /*[in]*/ const void* pBuffer ,
|
|
/*[in]*/ DWORD dwCount )
|
|
{
|
|
__ULT_FUNC_ENTRY("MPCHttpContext::Write");
|
|
|
|
HRESULT hr = m_hsOutput.write( pBuffer, dwCount );
|
|
|
|
|
|
__ULT_FUNC_EXIT(hr);
|
|
}
|