For my project, I need to downlink .zip files over Bluetooth. I am using python and obex for this. I have a working python opp client implemented (shout-out to ukBaz for the help), but I am still using os to start the server, so the rest of my server program has no idea when a file is received. The rest of the program is completed, but without output from the server, I can't trigger the unzip function to run. I've read the bluez-obex API documentation and there doesn't seem to be anything on starting a server. Is there another way of doing this? My code is below.
os.system("sudo obexpushd -B -o /home/pi/Desktop/ -n")
I am not familiar with obexpushd
and what it gives you over using the functionality that is there with obexd
.
My understanding is that you need to create an obex-agent to accept/reject a Bluetooth object push request with obexd
.
Monitoring the InterfacesAdded
DBus signal should give you the information that you need to know when a transfer has started. You can then monitor the PropertiesChanged
signal for when the status changes.
I was able to push a photo from my phone to a Raspberry Pi with the following running on the RPi (I had my phone and RPi already paired):
from gi.repository import GLib
import pydbus
BUS_NAME = 'org.bluez.obex'
PATH = '/org/bluez/obex'
AGENT_MANAGER_INTERFACE = 'org.bluez.obex.AgentManager1'
AGENT_INTERFACE = 'org.bluez.obex.Agent1'
SESSION_INTERFACE = 'org.bluez.obex.Session1'
TRANSFER_INTERFACE = 'org.bluez.obex.Transfer1'
ses_bus = pydbus.SessionBus()
def transfer_status_handler(iface, props_changed, props_removed):
if iface == TRANSFER_INTERFACE:
status = props_changed.get('Status')
if status == 'complete':
print('Transfer complete')
elif status == 'queued':
print('Still queued')
elif status == 'active':
print('transferring')
elif status == 'suspended':
print('Suspended')
elif status == 'error':
print('error')
def iface_added_handler(dbus_path, interfaces):
if SESSION_INTERFACE in interfaces and 'server' in dbus_path:
print('Server session added')
elif TRANSFER_INTERFACE in interfaces and 'server' in dbus_path:
print('Transfer started')
transfer = ses_bus.get(BUS_NAME, dbus_path)
transfer.onPropertiesChanged = transfer_status_handler
class Agent:
"""
<node>
<interface name='org.bluez.obex.Agent1'>
<method name='Release'>
</method>
<method name='AuthorizePush'>
<arg type='s' name='path' direction='out'/>
<arg type='o' name='transfer' direction='in'/>
</method>
<method name='Cancel'>
</method>
</interface>
</node>
"""
def AuthorizePush(self, path):
print('Authorize Push', path)
transfer = ses_bus.get(BUS_NAME, path)
props = transfer.GetAll(TRANSFER_INTERFACE)
print(props)
return props.get('Name')
def Cancel(self):
print('Authorization Cancelled')
def Release(self):
pass
if __name__ == '__main__':
obex_mngr = ses_bus.get('org.bluez.obex', '/')
obex_mngr.onInterfacesAdded = iface_added_handler
mainloop = GLib.MainLoop()
ses_bus.register_object('/test/agent', Agent(), None)
print('Agent created')
agnt_mngr = ses_bus.get(BUS_NAME, PATH)
agnt_mngr.RegisterAgent('/test/agent')
print('Agent registered')
try:
mainloop.run()
except KeyboardInterrupt:
mainloop.quit()
This code just accepts any request that is made of it. This is probably a bad thing to do and people might want to add some checking (or prompt the user) if the file should be accepted.