nokia的HTTP例子，添加自定义协议头

void CDXClientEngine::SetHeaderL(RHTTPHeaders aHeaders, TDesC8 aHdrField,

const TDesC8& aHdrValue)

{

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

HBufC8 * pField = aHdrField.AllocL();

RStringF rHdrField = iSession.StringPool().OpenFStringL(*pField);

CleanupClosePushL(valStr);

THTTPHdrVal val(valStr);

aHeaders.SetFieldL(rHdrField, val);

CleanupStack::PopAndDestroy(); // valStr

rHdrField.Close();

delete pField;

}

调用方法：

SetHeaderL(hdr, _L8("sessionID"), aSessionID);