[Interest] How to send OBEX messages with QBluetoothSocket?

[Edward Sutton]

Hi Steve,
QBluetoothTransferManager Class
http://doc.qt.io/qt-5/qbluetoothtransfermanager.html


Since Qt runs on both laptops and smartphones, I was not clear which target was running Qt.

I use this to send firmware file updates to an embedded  Bluetooth device


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

/// \brief Implements OBEX file transfer using Qt framework supporting

///

///  Qt 5.6 framework QBluetoothTransferManager supports platforms:

///     - Linux

///     - OS X

///

/// Android has QBluetooth support, however does *not* have QBluetoothTransferManager support

///     - The Android implementation uses JNI to launch an Intent to Bluetooth Share.

///     - While this appraoch works it confuses users:

///         1. On updating a TK, the TSR app disappears.

///         2. A file share window appears with list of *every* device that had *ever* been paired.

///         3. User must quickly select the correct TK_000X destination within about 15 seconds.

///

void ConnectionPrivate::sendFileObex(const QString& pathToFileToSend,

                                            const QString& destinationPath)

{

    Q_UNUSED(destinationPath);


    // - Qt OSX can show send file progress

    // - Qt Android has no file progress feeback

    // - Windows 32 feet code has no file progress feeback

    TrackerConnectionPrivateData::stateTransition(TrackerConnection::TrackerStateFileSending);


    QBluetoothServiceInfo bluetoothServiceInfoDestination = m_mapServiceClassUuidToService[this->fileToSendBluetoothServiceClassUuidDestination];


    qDebug("OBEX push to: %s", bluetoothServiceInfoDestination.device().address().toString().toLatin1().data());


    QFileInfo fileInfoFileToSend(pathToFileToSend);

    qDebug("file.......: %s", fileInfoFileToSend.absoluteFilePath().toLatin1().data());

    qDebug("file size..: %i bytes", (int) fileInfoFileToSend.size());

    qDebug("isReadable.: %s", fileInfoFileToSend.isReadable() ? "true" : "false" );


    Q_ASSERT_X(fileInfoFileToSend.exists(),

               Q_FUNC_INFO,

               "Expected m_pdfPrinter == 0");


    // QBluetoothTransferManager is not supported on Android

    // QBluetoothTransferManager works for OSX and Linux

    QBluetoothTransferManager bluetoothTransferManager;

    QBluetoothTransferRequest bluetoothTransferRequest(bluetoothServiceInfoDestination.device().address());


    QFile* fileToSend = new QFile(pathToFileToSend);

    QBluetoothTransferReply *bluetoothTransferReply = bluetoothTransferManager.put(bluetoothTransferRequest, fileToSend);


    //bluetoothTransferManager is default parent

    //ensure that bluetoothTransferManager doesn't take reply down when leaving scope ( not sure why I did this or if needed )

    bluetoothTransferReply->setParent(this);


    if (bluetoothTransferReply->error())

    {

        this->bluetoothTransferReplyFinishedHandler(bluetoothTransferReply);

        bluetoothTransferReply->deleteLater();

        return;

    }


    connect(bluetoothTransferReply, SIGNAL(transferProgress(qint64,qint64)),

            this, SLOT(bluetoothTransferReplyUploadProgressHandler(qint64,qint64)));


    connect(bluetoothTransferReply, SIGNAL(finished(QBluetoothTransferReply*)),

            this, SLOT(bluetoothTransferReplyFinishedHandler(QBluetoothTransferReply*)));

}



On Jun 14, 2016, at 12:42 AM, Steffen Hollenbach <SteffenHollenbach at web.de<mailto:SteffenHollenbach at web.de>> wrote:


Hi,
I hope i am right here. I want to send OBEX messages from my laptop to my smartphone. The main goal is to get the contacts of my smartphone per PBAP (phonebook access profile).

For this I created in QT a QBluetoothSocket which opens a RFCOMM connection to my smartphone and connected it to the PBAP service of my smartphone.

Now i need to send a GET request and a message with headers and data. I know (I hope so) which header and belonging data I need, but I do not know how to send it to the socket.

The socket expects a const char *data parameter. What i need to send:

GET Request with Headers:

Header ID: Connection Id
Value: 1

Header ID: Name
Value: telecom/pb

Header ID: Type
Value: x-bt/vcard-listing


Can someone please help me how to create this data message and send it through the socket to my smartphone?
I use wireshark to check the data, but all i get is a malformed OBEX package or the laptop just sends an OBEX fragement, but no OBEX message.

Thank you.

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