// Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//
#include "cimapheaderfieldsparser.h"
#include "cimapheaderfields.h"
#include "cimapsessionconsts.h"
#include "cimaplogger.h"
#include "cimapcommand.h"
CImapHeaderFieldsParser::CImapHeaderFieldsParser(TInt aLogId) :
iState(EWaitLine),
iLogId(aLogId)
{
}
void CImapHeaderFieldsParser::Construct(CImapHeaderFields* aHeaderFields)
{
iHeaderFields = aHeaderFields;
iHeaderFieldsOwned = ETrue;
}
CImapHeaderFieldsParser::~CImapHeaderFieldsParser()
{
if (iHeaderFieldsOwned)
{
delete iHeaderFields;
}
}
TBool CImapHeaderFieldsParser::ProcessBlockL(const TDesC8& aData)
{
TBool wantMore = ETrue;
switch (iState)
{
case EWaitLine:
{
if ((aData.Length() >= 3) && (aData[aData.Length() - 1] == '}'))
{
iState = EWaitLiteral;
}
else
{
// Header Fields ALWAYS delivered as a literal
CImapCommand::CorruptDataL(iLogId);
}
}
break;
case EWaitLiteral:
{
ParseHeaderFieldsBlockL(aData);
iState = EParseComplete;
wantMore = EFalse;
}
break;
case EParseComplete:
default:
{
ASSERT(EFalse);
wantMore = EFalse;
}
break;
}
return wantMore;
}
TPtrC8 CImapHeaderFieldsParser::UnparsedData()
{
return iData;
}
void CImapHeaderFieldsParser::ParseHeaderFieldsBlockL(const TDesC8& aData)
{
// Only expecting one header fields block.
// Check that we own the header fields at this point.
ASSERT(iHeaderFieldsOwned);
iData.Set(aData);
ParseFieldsL();
// The block has been parsed so transfer ownership of iHeaderFields
HeaderFieldsComplete(iHeaderFields);
iHeaderFieldsOwned = EFalse;
}
void CImapHeaderFieldsParser::ParseFieldsL()
{
RArray<TPtrC8> parts;
CleanupClosePushL(parts);
TInt length(0);
// Parse one line at a time
TInt posCrlf = iData.Find(KImapTxtCrlf);
while (posCrlf >= 0)
{
// Fetch the line and consume it from iData
TPtrC8 line = iData.Left(posCrlf);
if (line.Length() > 0)
{
parts.AppendL(line);
length += line.Length();
}
else
{
// Two instances of CRLF in a row. This signifies the end of the previous line.
ParsePartsL(parts, length);
}
if (iData.Length() > posCrlf + KImapTxtCrlf.iTypeLength)
{
iData.Set(iData.Mid(posCrlf + KImapTxtCrlf.iTypeLength));
if (iData[0] > ' ')
{
// Next line does not contain whitespace as its first character. This
// signifies the end of the previous line.
ParsePartsL(parts, length);
}
}
else
{
iData.Set(KNullDesC8());
}
posCrlf = iData.Find(KImapTxtCrlf);
}
// Data block is now complete. Process any oustanding parts.
ParsePartsL(parts, length);
CleanupStack::PopAndDestroy(&parts);
}
void CImapHeaderFieldsParser::ParsePartsL(RArray<TPtrC8>& aParts, TInt& aLength)
{
if (aParts.Count() > 0)
{
// Search for colon in the first part
TInt posColon = aParts[0].Locate(':');
// Ignore line if it has no colon (or if it begins with a colon)
if (posColon > 0)
{
TPtrC8 fieldName(aParts[0].Left(posColon));
// Move past the colon
++posColon;
// Check that there is some data still left to process after the colon.
if (aLength > posColon)
{
// Update the first part to remove the portion before the colon
if (aParts[0].Length() > posColon)
{
aParts[0].Set(aParts[0].Mid(posColon));
}
else
{
aParts[0].Set(KNullDesC8());
}
aLength -= posColon;
// Strip all whitespace up to the start of the field data
TInt part(0);
for (; part < aParts.Count(); ++part)
{
while ((aParts[part].Length() > 0) && (aParts[part][0] <= ' '))
{
aParts[part].Set(aParts[part].Mid(1));
aLength--;
}
// Either we have found a non whitespace character, or the current part
// is empty. If we have found a non whitespace character, we can exit the
// loop now.
if (aParts[part].Length() > 0)
{
break;
}
}
if (aLength > 0)
{
HBufC8* wholeLine = HBufC8::NewLC(aLength);
for (part = 0; part < aParts.Count(); ++part)
{
wholeLine->Des().Append(aParts[part]);
}
// Pop whole line as ownership is about to be transferred
CleanupStack::Pop(wholeLine);
__LOG_FORMAT((iLogId, "Add header field - %S: %S", &fieldName, &(*wholeLine)));
iHeaderFields->SetFieldL(fieldName, wholeLine);
}
}
}
aParts.Reset();
aLength = 0;
}
}