Web Services fail

[nadav70]

Hi,

I'm failing with using the Web Services framework:

I've used wsdl2cpp to create the required classes.
In my code I call NewL on my service class.
The consumer class's SetStatus method is called with KSenConnectionStatusReady, which should be the value after
connecting. Strangely enough, it doesn't seem as if a connection has been established, because:

• No access point selection popup was presented.
• It all happens too fast (<8 miliseconds).
• The server is located behind a private network, and to reach it, a specific wireless network must be connected.

When I then try to send the SOAP request (using the generated class's service methods), I get a strange error code: -23654.

What am I missing here?

Code fragments can be found below.

Please help,
Thanks,
Nadav

void
CLoginConnectConsumer::ServiceL()
{
	...
	
	CSenXmlServiceDescription * serviceDesc =
		CSenXmlServiceDescription::NewL( KMyServicesUrl, KNullDesC8() );
	
	serviceDesc->SetFrameworkIdL( KDefaultBasicWebServicesFrameworkID );

	// After this call, SetStatus is called
	iLoginConnectService = CLoginConnectServiceService::NewL(
		*this, *serviceDesc );
}

void
CLoginConnectConsumer::SetStatus(
	const TInt aStatus )
{	
	switch( aStatus )
	{
		...

		case KSenConnectionStatusReady:
			// ===> This is called, and now, sending request...
			{
				TInt err = SendRequest(); // <=== This fails. See below
				if ( err == KErrNone )
					return;
			}
			break;

		...			
	}
	
	delete iLoginConnectService;
	iLoginConnectService = NULL;
}

TInt
CLoginConnectConsumer::SendRequest()
{
	RLoginConnectRequest    request;
	RLoginConnectResponse   response;
	CSenSoapFault         * soapFault = NULL;
	
	InitRequest( request ); // Initializing the request's parameters

	// ====> Following line returns with err = -23654
	TRAPD( err, iLoginConnectService->LoginConnectL( request, response, &soapFault ) );


	if ( soapFault )
	{
		HandleSoapFaultL( *soapFault );
		delete soapFault;
	}
	response.Close();
	request.Close();

	return err;
}

From generated code:

void
CLoginConnectServiceService::LoginConnectL(
	const RLoginConnectRequest  & aLoginConnectRequest,
	RLoginConnectResponse       & aResult,
	CSenSoapFault              ** aFault)
{
	if (NULL != aFault)
		*aFault = NULL;

	TPtrC8 reqStr;

	// ===> Following line leaves with code -23654
	Xsd::SenOps::ProcessOutgoingMessageLC(
		aLoginConnectRequest,
		"loginConnectRequest",
		"http://myCompany.com/services/myServices",
		"xdb",
		reqStr );

	...
}

[nadav70]

Ok, got the solution . Since other people might benefit from it, there it is:

It turns out this error code (-23654) is generated in case SOAP request mal-formatted.

Specifically in my case, I had not initialized a string field, and therefore, the request was invalid.

Similar error can also occur if the reply is corrupted. For example, when the server fails to send a mandatory field. In this case, the error code would be -23634.

Wish things were better documented. It would have saved me 2 days work. However, life's not always easy.

Cheers,
Nadav

[shekhar.garge]

Hi Nadav,

My application uses web-services. I've used WSDL to C++ tool to generate the code.

The application works perfect for FP1 and FP2 devices (namely Nokia N73, N82, N95 and Nokia 78, 6220 classic) but it fails for E75 device.
The return code is "-23634".

Any idea why it behaves differently for E75, if it works great for other devices?

Any kind of help is appreciated.

Thanks,
Shekhar

[nadav_smilansky]

Hello shekhar,

It is the same nadav by a different name .

I'm not using wsdl2cpp anymore, because I've found that if trying to cancel a request (due to timeout) the code is getting stuck. So everything I say below is based only on an educated guess.

According to my previous post it seems as if the server response is not as expected by your web-services class.
If this happens only on E75, I would guess that the request sent by the E75 is somehow different than the request sent by other phones. As a result, the server may send a different reply or send an error, which results in the error code that you get.

I would recommend:

1. Check if some of the fields of the request contain phone-specific data.
2. Use a sniffer to see exactly what is sent from client to server and vice versa.

Good luck,
Nadav

[shekhar.garge]

Hello Nadav,

Thanks for the quick and clear reply. I’ll try as per your recommendation.

Hoping your help in future too!!

Thanks,
Shekhar

[noam.segal]

Hi

I have found a work around that solved this problem on 5800, N86, 5630.

First I begin with the problem. the function HandleMessageL(const TDesC8& aMessage)
from the generated code receives xml without the xml header
<?xml version=\"1.0\" ?>

and some of calls return without the envelop header
<S:Envelope xmlns:S=\"http://schemas.xmlsoap.org/soap/envelope/\">.

I also rewrite the soap header.
after doing all this work the parser works like a charm.
I'd like to mention that the response from the server is the same for all working and non working devices
the problem is with parsing of response in the different devices. I also noticed that the user agent is not
the same.

So the following is an example how to resolve the problem:

_LIT8(KXMLHEADER,"<?xml version=\"1.0\" ?>");
_LIT8(KMLENVELOP,"<S:Envelope xmlns:S=\"http://schemas.xmlsoap.org/soap/envelope/\">");
_LIT8(KXMLENDENVELOP,"</S:Envelope>");

_LIT8(KDELBODY, "<S:Body xmlns:S=\"http://schemas.xmlsoap.org/soap/envelope/\">");
_LIT8(KADD, "<S:Body>");

void MDistributionClientServiceImplServiceConsumer::HandleMessageL(const TDesC8& aMessage)
{
TInt err = KErrNone;
Xsd::SenOps::CProcessedIncomingMessage* procMsg = NULL;

/////////////////here is my code//////////////////////////////////////////////
TInt pos = aMessage.Find(KXMLHEADER);
if(pos == KErrNotFound)
{
int len1, len2, len3, len4, count;
len1 = KXMLHEADER().Length();
len2 = KXMLENDENVELOP().Length();
len3 = aMessage.Length();
len4 = KXMLENDENVELOP().Length();
count = len1 + len2 + len3 + + len4 + 100;
HBufC8 *msg = HBufC8::NewMaxL(count);
TPtr8 ptr(msg->Des ());
ptr.SetLength(count);
ptr.Copy(KXMLHEADER);
pos = aMessage.Find(KMLENVELOP);

if(pos == KErrNotFound)
{
ptr.Append(KMLENVELOP);
ptr.Append(aMessage);
ptr.Append(KXMLENDENVELOP);
}
else
{
ptr.Append(aMessage);
}


pos = ptr.Find(KDELBODY);
if(pos != KErrNotFound)
{
ptr.Delete(pos, KDELBODY().Length());
ptr.Insert(pos, KADD);
}

TRAP(err, procMsg = Xsd::SenOps::ProcessIncomingMessageL(*msg, ETrue))
delete msg;
}
else
{
TRAP(err, procMsg = Xsd::SenOps::ProcessIncomingMessageL(aMessage, ETrue))
}

/////////////////////////////////////////////////////////////////////////////////

// from here the code continues as usual
if (err == KErrNone)
{
CleanupStack::PushL(procMsg);
if ( procMsg->IsBodyContent("http://blabla", "keepAliveResponse") )
{
RKeepAliveResponse response;
TRAP(err, procMsg->ExtractMessageL(response));
if (err == KErrNone)
{
HandleKeepAliveResponseL(response);
}
}
else if ( procMsg->IsBodyContent("http://") )
{
RLoginResponse response;
TRAP(err, procMsg->ExtractMessageL(response));
if (err == KErrNone)
{
HandleLoginResponseL(response);
}
}
else if (procMsg->IsSoapFault())
{
CSenSoapFault *fault = procMsg->GetSoapFault();
CleanupStack::PushL(fault);
HandleSoapFaultL(*fault);
CleanupStack::PopAndDestroy(fault);
}
else
{
err = Xsd::KErrXmlInvalidElement;
}
CleanupStack::PopAndDestroy(); // delete procMsg;
}
if (err != KErrNone)
{
HandleErrorL(err, Xsd::SenOps::KErrorHandleMsg);
}

[adhilu]

Hi,

The work around code is working fine for E75

Thanks,