Read contacts using obex in c#

Question

I'm trying to read contacts using 32feet library for c#. I'm connecting my PC to mobile device via bluetooth, and when I try to execute this code always give me bad request error

LocalInfo.SetServiceState(BluetoothService.PhonebookAccessPce, true);
BluetoothAddress addr = BluetoothAddress.Parse("00:00:00:00:00:00");
BluetoothEndPoint rep = new BluetoothEndPoint(addr, BluetoothService.PhonebookAccessPse);
BluetoothClient cli = new BluetoothClient();
cli.Connect(rep);

Uri uri = new Uri(ObexUri.UriSchemeObex + "://" + addr + "/telecom/pb.vcf");
ObexWebRequest request = new ObexWebRequest(uri);
request.Method = "GET";
request.ContentType = "text/x-vCard";
ObexWebResponse resp = (ObexWebResponse)request.GetResponse();

And in the constructor:

private BluetoothDeviceInfo localinfo = null;
public BluetoothDeviceInfo LocalInfo
    {
        get
        {
            return localinfo = (localinfo ?? new BluetoothDeviceInfo(BluetoothRadio.PrimaryRadio.LocalAddress));
        }
    }

What I'm doing wrong? Is the URI wrong, or I need a different Bluetooth?

KYHSGeekCode · Answer 1 · 2018-03-15T15:49:25.027

1

Though I am not an expert in 32feet, I know that the Name Header of the GET request retrieving vcard should be null. Why don't you try using empty or null URI?

Edit I found some statements that requires you to use obex-ftp instead of obex.

Remarks

For Object Exchange the method code is mapped to the equivalent HTTP style method. For example "PUT", "GET" etc. "PUT" is the default value. There is new support for GET as of version 2.5.

To use GET change the Method to " GET " and you must also use scheme " obex-ftp " in the URL instead of the usual " obex " -- unless you know that the default OBEX server you are connecting supports GET.

And it is cited from here.

Edit

Phonebook Access Similar to file transfer, but uses a target {0x79, 0x61, 0x35, 0xF0, 0xF0, 0xC5, 0x11, 0xD8, 0x09, 0x66, 0x08, 0x00, 0x20, 0x0C, 0x9A, 0x66}; phonebook entries can be listed (with various possible orderings and filters) and retrieved from certain directories under telecom/ using GET and SETPATH

--according to wikipedia you should put some specific UUID to TARGET header when you connect to phonebook access.

Like codes from here, you should not only specify PBAP Service UUID 0000112f-0000-1000-8000-00805f9b34fb on RFCOMM level, but also have to specify target header UUID 0x79, 0x61, 0x35, (byte) 0xf0, (byte) 0xf0, (byte) 0xc5, 0x11, (byte) 0xd8, 0x09, 0x66, 0x08, 0x00, 0x20, 0x0c, (byte) 0x9a, 0x66 on OBEX level in type header.

edited Mar 15 '18 at 15:49

answered Mar 04 '18 at 15:49

KYHSGeekCode

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Hi, thanks to answer. Using empty or null URI give me same error: System.Net.WebException: 'GET failed with code: BadRequest, Final' – Gorka Astigarraga Mar 04 '18 at 17:34
Do you have any example that can work? I would greatly appreciate your help – Gorka Astigarraga Mar 04 '18 at 18:46
Try this. [1]: https://stackoverflow.com/questions/48872112/read-contacts-using-bluetooth With patching "" to null. I'll have to learn more about 32feet to post better answer. – KYHSGeekCode Mar 05 '18 at 06:14
Thanks for reply. Using both gives me socket exception. I don't know if the uri I'm using ("telecom/pb.vcf") is correct... – Gorka Astigarraga Mar 06 '18 at 07:04
According to wikipedia ( https://en.m.wikipedia.org/wiki/OBject_EXchange) it is correct uri. – KYHSGeekCode Mar 06 '18 at 07:35
How about not specifing contenttype? And what socket error do you get? – KYHSGeekCode Mar 06 '18 at 07:36
Hi, thanks to answer. ObexUri doesn't have ObexUri.UriSchemeObexPbap, only Obex, ObexFtp and ObexSync – Gorka Astigarraga Mar 06 '18 at 17:01
I found nice answer for you! Try specifying TARGET header of your connect request. – KYHSGeekCode Mar 12 '18 at 15:51

Read contacts using obex in c#

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