/*

* Copyright (c) 2006-2008 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:   Implementation of CCatalogsHttpStack

*

*/

#include "catalogshttpstack.h"

#include <uri8.h>

#include <http.h>

#include <chttpformencoder.h>

#include <httpstringconstants.h>

#include <http/rhttptransaction.h>

#include <http/rhttpsession.h>

#include <http/rhttpheaders.h>

#include <es_enum.h>

#include <in_sock.h>

// HTTP headers

#include <uaproffilter_interface.h>

#include <CookieFilterInterface.h>

#include "catalogs_device_config.h"

#include "catalogshttptypes.h"

#include "catalogshttpconnectioncreator.h"

#include "catalogshttpsessionmanagerimpl.h"

#include "catalogsnetworkmanager.h"

#include "catalogserrors.h"

#include "catalogsconnectionmethod.h"

#include "catalogshttputils.h"

#include "catalogsconnection.h"

#include "catalogsconstants.h"

#include "catalogsdebug.h"

// Uncomment this to enable CHttpDeflateFilter in ARM-builds (accepts zipped input)

#define ENABLE_DEFLATE_FILTER

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::NewL()

//

// Creates instance of CCatalogsHttpStack.

// ----------------------------------------------------------------------------

CCatalogsHttpStack* CCatalogsHttpStack::NewL( 

    MCatalogsHttpStackObserver* aObserver,

    CCatalogsConnection& aConnection,

    CCatalogsHttpConnectionCreator& aConnectionCreator )

    {

    CCatalogsHttpStack* self = CCatalogsHttpStack::NewLC( 

        aObserver, 

        aConnection,

        aConnectionCreator );

    CleanupStack::Pop( self );

    return self;

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::NewLC()

//

// Creates instance of CCatalogsHttpStack.

// ----------------------------------------------------------------------------

CCatalogsHttpStack* CCatalogsHttpStack::NewLC( 

    MCatalogsHttpStackObserver* aObserver,

    CCatalogsConnection& aConnection,

    CCatalogsHttpConnectionCreator& aConnectionCreator )

    {

    CCatalogsHttpStack* self = new (ELeave) CCatalogsHttpStack( 

        aObserver, 

        aConnection,

        aConnectionCreator );

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::CCatalogsHttpStack()

//

// First phase constructor.

// ----------------------------------------------------------------------------

CCatalogsHttpStack::CCatalogsHttpStack( 

    MCatalogsHttpStackObserver* aObserver,

    CCatalogsConnection& aConnection,

    CCatalogsHttpConnectionCreator& aConnectionCreator ) :

    CActive( EPriorityNormal ),

    iTable( RHTTPSession::GetTable() ),

    iObserver( aObserver ),

    iConnection( aConnection ),

    iConnectionCreator( aConnectionCreator )

    {

    CActiveScheduler::Add( this );

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::~CCatalogsHttpStack()

//

// Destructor.

// ----------------------------------------------------------------------------

CCatalogsHttpStack::~CCatalogsHttpStack()

    {

    DLTRACEIN( ( "" ) );

    CancelTransaction();        

    iTimer.Close();

    iSession.Close();  // closes also iTransaction if necessary   

    delete iPostData;

    iRunning = EFalse;

    // The headers are deleted when the transaction configuration is deleted

    iUserHeaders.Reset();

    DLTRACEOUT( ( "" ) );

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::ConstructL()

//

// Second phase construction.

// ----------------------------------------------------------------------------

void CCatalogsHttpStack::ConstructL()

    {

    DLTRACE( ( "CCatalogsHttpStack::ConstructL(): %X", this ) );

    iConnectionOpened = ETrue;

    // Open RHTTPSession with default protocol ( "HTTP/TCP" )    

    // Most common error for leaves: no access point configured, 

    // and session creation

    // leaves with KErrNotFound.    

    iSession.OpenL();

    iPool = iSession.StringPool();

    // Initialize the HTTP to use the created socket server. Without these

    // settings, the HTTP protocol would open a connection of its own; this is not

    // desired, because the GPRS connection would then be broken after every query.

    RHTTPConnectionInfo info = iSession.ConnectionInfo();

    info.SetPropertyL( iPool.StringF( HTTP::EHttpSocketServ, iTable ),

                       iConnection.SocketServer().Handle() );

    info.SetPropertyL( iPool.StringF( HTTP::EHttpSocketConnection, iTable ),

                       ( TInt )&iConnection.Connection() );

    // Open tables to enable HTTP filters

    iPool.OpenL( HttpFilterCommonStringsExt::GetTable() );

    iPool.OpenL( HttpFilterCommonStringsExt::GetLanguageTable() );

    // Install this class as the callback for authentication requests. When 

    // page requires authentication the framework calls GetCredentialsL to get 

    // user name and password.

    InstallAuthenticationL( iSession );

// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

// Note: these filters do not seem to work on the E60 phone

// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    // Install accept filters

    // This crashes on 3.0 week 42 and earlier

    DLTRACE(( "->installing AcceptHeader filter" ));

    TRAPD( err, CHttpFilterAcceptHeaderInterface::InstallFilterL( iSession ) );

    if ( err != KErrNone )

        {

        DLTRACE(("->CHttpFilterAcceptHeaderInterface::InstallFilterL() ERROR: %d", 

            err ) );

        }

// Don't install UAprof filter if user agent is overridden

#ifndef CATALOGS_OVERRIDE_USERAGENT

    // This does not crash on 3.0. Wonders! 

    // Install UAprof filters, ignore errors

    DLTRACE(( "->installing UAProf filter" ));

    TRAP( err, CHttpUAProfFilterInterface::InstallFilterL( iSession ) );

    if ( err != KErrNone )

        {

        DLTRACE( ("->CHttpUAProfFilterInterface::InstallFilterL() ERROR: %d", 

            err ) );

        }

#endif

// This is available on 3.0 but crashes on E60 wk40 and earlier.

#ifdef ENABLE_DEFLATE_FILTER

    // Accept zipped input

    DLTRACE( (_L( "->installing deflate filter" ) ) );

    TRAP( err, CHttpDeflateFilter::InstallFilterL( iSession ) );

    if ( err != KErrNone )

        {

        DLTRACE(("->CHttpDeflateFilter::InstallFilterL() ERROR: %d", err ));

        }

#endif // ENABLE_DEFLATE_FILTER

    // Install proxy filter, ignore errors

    DLTRACE( ( "->installing proxy filter" ) );

    TRAP( err, CHttpFilterProxyInterface::InstallFilterL( iSession ) );

    if ( err != KErrNone )

        {

        DLTRACE( ("CHttpFilterProxyInterface::InstallFilterL() ERROR: %d", err ) );

        }    

    // Install cookie filter, ignore errors

    DLTRACE( ( "->installing cookie filter" ) );

    TRAP( err, CHttpCookieFilter::InstallFilterL( iSession ) );

    if ( err != KErrNone )

        {

        DLTRACE( ("CHttpCookieFilter::InstallFilterL() ERROR: %d", err ) );

        }

    User::LeaveIfError( iTimer.CreateLocal() );

    DLTRACE( ("->CCatalogsHttpStack::ConstructL() ok") );

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CCatalogsHttpStack::SetConnectionMethodL( 

    const TCatalogsConnectionMethod& aMethod )

    {

    DLTRACEIN((("ap type: %d id: %u"), aMethod.iType, aMethod.iId ));

    iConnectionMethod = aMethod;        

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

TUint32 CCatalogsHttpStack::AccessPointID() const

    {

    return iConnectionMethod.iApnId;

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CCatalogsHttpStack::SetObserver( MCatalogsHttpStackObserver* aObserver )

    {

    iObserver = aObserver;

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CCatalogsHttpStack::SetConnectionManager( 

    CCatalogsHttpConnectionManager* aManager )

    {

    iConnectionManager = aManager;

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CCatalogsHttpStack::ClearHeaders()

    {

    DLTRACEIN((""));    

    // iUserHeaders doesn't own the headers

    iUserHeaders.Reset();

    }

// ---------------------------------------------------------------------------

// 

// ---------------------------------------------------------------------------

//

void CCatalogsHttpStack::AddHeaderL( const CCatalogsKeyValuePair* aPair )

    {

    DLTRACEIN((""));

    User::LeaveIfError( iUserHeaders.Append( aPair ) );

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::SetHeaderL()

//

// Used to set header value to HTTP request

// ----------------------------------------------------------------------------

void CCatalogsHttpStack::SetHeaderL( RHTTPHeaders aHeaders, 

                                     TInt aHdrField, 

                                     const TDesC8& aHdrValue )

    {

    DLTRACEIN((""));

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

    CleanupClosePushL( valStr );

    THTTPHdrVal val( valStr );

    aHeaders.SetFieldL( 

        iSession.StringPool().StringF( aHdrField, iTable ), val );

    CleanupStack::PopAndDestroy( &valStr );

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::IssueHTTPRequestL()

//

// Start a new HTTP transaction.

// ----------------------------------------------------------------------------

void CCatalogsHttpStack::IssueHttpRequestL( const TDesC8& aMethod,

                                       const TDesC8& aURI,

                                       const TDesC8& aContentType,

                                       const TDesC8& aBody )

    {

    DLTRACEIN( ( "body size: %d, this: %X", 

        aBody.Size(), this ) );

    DLINFO( ( "-> URI: %S", &aURI ) );

    // Parse string to URI

    TUriParser8 uri; 

    uri.Parse( aURI );

    // Using post as default HTTP method

    RStringF method;

    if ( aMethod.Length() == 0 )

        {

        // Get request method string for HTTP POST

        method = iSession.StringPool().StringF( HTTP::EPOST, iTable );

        }

    else

        {

        method = iSession.StringPool().OpenFStringL( aMethod );

        }

    CleanupClosePushL( method );

    iTransaction = iSession.OpenTransactionL( uri, *this, method );

    CleanupStack::PopAndDestroy( &method );

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

    TInt count = iUserHeaders.Count();

    for ( TInt i = 0; i < count; i++ )

        {

        CCatalogsKeyValuePair* pair = iUserHeaders[i];

        RStringF headerStr = iSession.StringPool().OpenFStringL( pair->Key() );

        CleanupClosePushL( headerStr );

        RStringF valueStr = iSession.StringPool().OpenFStringL( pair->Value() );

        CleanupClosePushL( valueStr );

        DLTRACE(("Header: %S, data: %S", &headerStr.DesC(), &valueStr.DesC() ));

        hdr.SetFieldL( headerStr, valueStr );

        CleanupStack::PopAndDestroy( 2, &headerStr ); // headerStr, valueStr

        }

    // Copy data to be posted into member variable; iPostData is used later in

    // methods inherited from MHTTPDataSupplier.

    delete iPostData;

    iPostData = 0;

    iPostData = aBody.AllocL();

#ifdef CATALOGS_OVERRIDE_USERAGENT

    // Override user agent string

    DLINFO(("Overriding user agent string with: %S", &KCatalogsOverrideUserAgent ));

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

#endif    

    if ( aBody.Length() > 0 )

        {

        if ( aContentType.Length() ) 

            {            

            SetHeaderL( hdr, HTTP::EContentType, aContentType );

            }

        else 

            // default to "text/xml"

            // Content-type must be sent in POST requests because some

            // proxies will reject the request if it's not present and doesn't

            // contain something

            {

            SetHeaderL( hdr, HTTP::EContentType, KMimeTypeXml );

            }

        // Set this class as an data supplier. Inherited MHTTPDataSupplier methods

        // are called when framework needs to send body data.

        MHTTPDataSupplier* dataSupplier = this;

        iTransaction.Request().SetBody( *dataSupplier );

        }

    iRunning = ETrue;

    iTransaction.SubmitL();

    if ( iObserver ) 

        {

        iObserver->RequestSubmitted();

        }

    SetTimeoutTimer();

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::CancelTransaction()

//

// Cancels currently running transaction and frees resources related to it.

// ----------------------------------------------------------------------------

void CCatalogsHttpStack::CancelTransaction()

    {

    DLTRACEIN( ("iActive: %d, iState: %d, this: %X", 

        IsActive(), 

        TInt( iState ), 

        this ) ); // cast required for armcc

    // Close() also cancels transaction ( Cancel() can also be used but 

    // resources allocated by transaction must be still freed with Close())

    if ( iRunning )

        {

        iTransaction.Close();

        // Not running anymore

        iRunning = EFalse;

        }

    Cancel();

    iState = ENone;

    }

// ----------------------------------------------------------------------------

// CCatalogsHttpStack::MHFRunL()

//

// Inherited from MHTTPTransactionCallback

// Called by framework to pass transaction events.

// ----------------------------------------------------------------------------

void CCatalogsHttpStack::MHFRunL( RHTTPTransaction aTransaction,

                             const THTTPEvent& aEvent )

    {

    DLTRACEIN( ( "CCatalogsHttpStack::MHFRunL(), event: %d, this: %X", 

        aEvent.iStatus, this ) );

    // Cancel timeout

    CancelTimeoutTimer();

    switch ( aEvent.iStatus )

        {

        case THTTPEvent::EGotResponseHeaders:

            {

            // HTTP response headers have been received. Use

            // aTransaction.Response() to get the response. However, it's not

            // necessary to do anything with the response when this event occurs.

            // Get HTTP status code from header

            RHTTPResponse resp = aTransaction.Response();

            iLastError = resp.StatusCode();

            if ( !iObserver ) 

                {      

                DLTRACEOUT(("No observer"));

                return;          

                }

            // Report response status code

            if ( iObserver->ResponseReceived( iLastError, resp.StatusText().DesC() ) ) 

                {

                return;

                }

            // what to do in case of redirect etc.?

            switch ( iLastError )

                {

                case 100:   // Continue

                case 101:   // Switching Protocols

                    {

                    // Informational

                    break;

                    }

                case 200:   // OK

                case 201:   // Created

                case 202:   // Accepted

                case 203:   // Non-Authoritative Information

                case 204:   // No Content

                case 205:   // Reset Content

                case 206:   // Partial Content

                    {

                    // Success

                    break;

                    }

                case 300:  // Multiple Choices   

                case 301:  // Moved Permanently  

                case 302:  // Found              

                case 303:  // See Other          

                case 304:  // Not Modified