// HttpClient.cpp

#include <e32base.h>

#include <http/rhttpheaders.h>

#include <http.h>

#include <commdb.h>

#include <eikenv.h>

#include <es_sock.h>

#include <bautils.h>

#include <CommDbConnPref.h>

#include "debug.h"

#include "constants.h"

#include "HttpClient.h"

#include "connectionengine.h"

#include "settingsengine.h"

#include "Podcatcher.pan"

const TInt KTempBufferSize = 100;

CHttpClient::~CHttpClient()

  {

  if (iHandler)

  	{

  	iHandler->CloseSaveFile();

	delete iHandler;

  	}

  iSession.Close();

  }

CHttpClient* CHttpClient::NewL(CPodcastModel& aPodcastModel, MHttpClientObserver& aObserver)

  {

  CHttpClient* me = NewLC(aPodcastModel, aObserver);

  CleanupStack::Pop(me);

  return me;

  }

CHttpClient::CHttpClient(CPodcastModel& aPodcastModel, MHttpClientObserver& aObserver) : iPodcastModel(aPodcastModel), iObserver(aObserver)

  {

  iResumeEnabled = EFalse;

  }

CHttpClient* CHttpClient::NewLC(CPodcastModel& aPodcastModel, MHttpClientObserver& aObserver)

  {

  CHttpClient* me = new (ELeave) CHttpClient(aPodcastModel, aObserver);

  CleanupStack::PushL(me);

  me->ConstructL();

  return me;

  }

void CHttpClient::ConstructL()

  {

  iPodcastModel.ConnectionEngine().AddObserver(this);

  }

void CHttpClient::SetHeaderL(RHTTPHeaders aHeaders, TInt aHdrField, const TDesC8& aHdrValue)

	{

	RStringF valStr = iSession.StringPool().OpenFStringL(aHdrValue);

	THTTPHdrVal val(valStr);

	aHeaders.SetFieldL(iSession.StringPool().StringF(aHdrField, RHTTPSession::GetTable()), val);

	valStr.Close();

	}

TBool CHttpClient::IsActive()

	{

	return iIsActive;

	}

void CHttpClient::SetResumeEnabled(TBool aEnabled)

	{

	iResumeEnabled = aEnabled;

	}

void CHttpClient::ConnectHttpSessionL()

{

	DP("ConnectHttpSessionL START");	

	CConnectionEngine::TConnectionState connState = iPodcastModel.ConnectionEngine().ConnectionState();

	if(connState == CConnectionEngine::EConnected)

		{

		DP("ConnectionState == CConnectionEngine::EConnected");

		// Session already connected, call connect complete directly but return status since URLs or so might be faulty

		ConnectCompleteL(KErrNone);		

		return;

		}

	if(connState == CConnectionEngine::ENotConnected)

		{

		DP1("SpecificIAP() == %d",iPodcastModel.SettingsEngine().SpecificIAP());

		if(iPodcastModel.SettingsEngine().SpecificIAP() == -1)

			{

			iPodcastModel.ConnectionEngine().StartL(CConnectionEngine::EUserSelectConnection);	

			}

		else if ( iPodcastModel.SettingsEngine().SpecificIAP() == 0 )

			{

			iPodcastModel.ConnectionEngine().StartL(CConnectionEngine::EDefaultConnection);	

			}

			{

			iPodcastModel.ConnectionEngine().StartL(CConnectionEngine::EIAPConnection);

			}

		}

	DP("ConnectHttpSessionL END");	

}

void CHttpClient::ConnectCompleteL(TInt aErrorCode)

	{

	if(iWaitingForGet)

		{

		iWaitingForGet = EFalse;

		if( aErrorCode == KErrNone)

			{

			RHTTPConnectionInfo connInfo = iSession.ConnectionInfo();

			RStringPool pool = iSession.StringPool();

			// Attach to socket server

			connInfo.SetPropertyL(pool.StringF(HTTP::EHttpSocketServ, RHTTPSession::GetTable()), THTTPHdrVal(iPodcastModel.ConnectionEngine().SockServ().Handle()));

			// Attach to connection

			TInt connPtr = REINTERPRET_CAST(TInt, &iPodcastModel.ConnectionEngine().Connection());

			connInfo.SetPropertyL(pool.StringF(HTTP::EHttpSocketConnection, RHTTPSession::GetTable()), THTTPHdrVal(connPtr));

			iPodcastModel.SetProxyUsageIfNeededL(iSession);

			DoGetAfterConnectL();		

			}

		else

			{

			ClientRequestCompleteL(KErrCouldNotConnect);

			iSession.Close();			

			}

		}				

	}

void CHttpClient::Disconnected()

	{

	iIsActive = EFalse;

	iSession.Close();

	}

void  CHttpClient::DoGetAfterConnectL()

	{	

	// since nothing should be downloading now. Delete the handler

	if (iHandler)

		{

		delete iHandler;

		iHandler = NULL;

		}

	iHandler = CHttpEventHandler::NewL(this, iObserver, iPodcastModel.FsSession());

	iHandler->SetSilent(iSilentGet);

	TEntry entry;

	TBuf8<KTempBufferSize> rangeText;

	if (iResumeEnabled && iPodcastModel.FsSession().Entry(iCurrentFileName, entry) == KErrNone) {

		DP1("Found file, with size=%d", entry.iSize);

		// file exists, so we should probably resume

		rangeText.Format(_L8("bytes=%d-"), (entry.iSize-KByteOverlap > 0 ? entry.iSize-KByteOverlap : 0));

		iHandler->SetSaveFileName(iCurrentFileName, ETrue);

	} else {

		// otherwise just make sure the directory exists

		BaflUtils::EnsurePathExistsL(iPodcastModel.FsSession(),iCurrentFileName);

		iHandler->SetSaveFileName(iCurrentFileName);

	}

	RStringPool strP = iSession.StringPool();

	RStringF method;

	method = strP.StringF(HTTP::EGET, RHTTPSession::GetTable());

	iTrans = iSession.OpenTransactionL(iUriParser, *iHandler, method);

	RHTTPHeaders hdr = iTrans.Request().GetHeaderCollection();

	// Add headers appropriate to all methods

	SetHeaderL(hdr, HTTP::EUserAgent, KUserAgent);

	SetHeaderL(hdr, HTTP::EAccept, KAccept);

	TBuf<KTempBufferSize> range16;

	range16.Copy(rangeText);

	DP1("range text: %S", &range16);

	if (rangeText.Length() > 0) {

		SetHeaderL(hdr, HTTP::ERange, rangeText);

	}

	iTransactionCount++;

	// submit the transaction

	iTrans.SubmitL();

	iIsActive = ETrue;	

	DP("CHttpClient::Get END");		

	}

TBool CHttpClient::GetL(const TDesC& aUrl, const TDesC& aFileName,  TBool aSilent) {

	DP("CHttpClient::Get START");

	if (iIsActive)

		{

		return EFalse;

		}

	DP1("Getting URL: %S", &aUrl);

	DP1("Writing file: %S", &aFileName);

	iCurrentURL.Copy(aUrl);	

	TInt urlError = iUriParser.Parse(iCurrentURL);

	if(urlError != KErrNone ||!iUriParser.IsSchemeValid())

		{		

		iCurrentURL = KNullDesC8;

		iSession.Close();		

		iObserver.CompleteL(this, KErrHttpInvalidUri);

		return EFalse;		

		}	

	iSilentGet = aSilent;

	iCurrentFileName.Copy(aFileName);

	iWaitingForGet = ETrue;

	if (iTransactionCount == 0) 

		{

		DP("CHttpClient::GetL\t*** Opening HTTP session ***");

		iSession.Close();

		iSession.OpenL();

		ConnectHttpSessionL();			

		}

	else

		{

		DoGetAfterConnectL();		

		}

	return ETrue;

}

void CHttpClient::Stop()

	{

	iIsActive = EFalse;

	if(iHandler != NULL)

		{

		// cancel the ongoing transaction

		iTrans.Cancel();

		iTransactionCount = 0;

		// make sure that we save the file

		iHandler->CloseSaveFile();

		// we could now delete the handler since a new will be created

		delete iHandler;

		iHandler = NULL;

		// close the session

		DP("CHttpClient::Stop\t*** Closing HTTP session ***");

		iSession.Close();

		}

	TRAP_IGNORE(iObserver.CompleteL(this, KErrDisconnected));

	}

void CHttpClient::ClientRequestCompleteL(TInt aErrorCode) {

	iIsActive = EFalse;

	iObserver.CompleteL(this, aErrorCode);

	DP("CHttpClient::ClientRequestCompleteL");

	if(iTransactionCount>0)

		{

		iTransactionCount--;

		if(iTransactionCount == 0) 

			{

			DP("CHttpClient::ClientRequestCompleteL\t*** Closing HTTP session ***");

			delete iHandler;

			iHandler = NULL;

			iSession.Close();

			}

		}

}