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Added bluetooth OBEX file browser service (see #89)

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This commit is contained in:
Fabio Manganiello 2019-12-12 00:11:27 +01:00
parent 5d2d7d55af
commit e1ed7f681c
4 changed files with 205 additions and 90 deletions
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99
platypush/backend/bluetooth/__init__.py
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@ -0,0 +1,99 @@
import os
import time
# noinspection PyPackageRequirements
from PyOBEX import headers, requests, responses
# noinspection PyPackageRequirements
from PyOBEX.server import Server
from platypush.backend import Backend
from platypush.message.event.bluetooth import BluetoothDeviceConnectedEvent, BluetoothFileReceivedEvent, \
BluetoothDeviceDisconnectedEvent, BluetoothFilePutRequestEvent
class BluetoothBackend(Backend, Server):
_sleep_on_error = 10.0
def __init__(self, address: str = '', port: int = None, directory: str = None, whitelisted_addresses=None,
**kwargs):
Backend.__init__(self, **kwargs)
Server.__init__(self, address=address)
self.port = port
self.directory = os.path.join(os.path.expanduser(directory))
self.whitelisted_addresses = whitelisted_addresses or []
self._sock = None
def run(self):
self.logger.info('Starting bluetooth service [address={}] [port={}]'.format(
self.address, self.port))
while not self.should_stop():
try:
# noinspection PyArgumentList
self._sock = self.start_service(self.port)
self.serve(self._sock)
except Exception as e:
self.logger.error('Error on bluetooth connection [address={}] [port={}]: {}'.format(
self.address, self.port, str(e)))
time.sleep(self._sleep_on_error)
finally:
self.stop()
def stop(self):
if self._sock:
self.stop_service(self._sock)
self._sock = None
def put(self, socket, request):
name = ""
body = ""
while True:
for header in request.header_data:
if isinstance(header, headers.Name):
name = header.decode()
self.logger.info("Receiving {}".format(name))
elif isinstance(header, headers.Length):
length = header.decode()
self.logger.info("Content length: {} bytes".format(length))
elif isinstance(header, headers.Body):
body += header.decode()
elif isinstance(header, headers.End_Of_Body):
body += header.decode()
if request.is_final():
break
# Ask for more data.
Server.send_response(self, socket, responses.Continue())
# Get the next part of the data.
request = self.request_handler.decode(socket)
Server.send_response(self, socket, responses.Success())
name = os.path.basename(name.strip("\x00"))
path = os.path.join(self.directory, name)
self.logger.info("Writing file {}" .format(path))
open(path, "wb").write(body.encode())
self.bus.post(BluetoothFileReceivedEvent(path=path))
def process_request(self, connection, request, *address):
if isinstance(request, requests.Connect):
self.connect(connection, request)
self.bus.post(BluetoothDeviceConnectedEvent(address=address[0], port=address[1]))
elif isinstance(request, requests.Disconnect):
self.disconnect(connection)
self.bus.post(BluetoothDeviceDisconnectedEvent(address=address[0], port=address[1]))
elif isinstance(request, requests.Put):
self.bus.post(BluetoothFilePutRequestEvent(address=address[0], port=address[1]))
self.put(connection, request)
else:
self._reject(connection)
self.bus.post(BluetoothFilePutRequestEvent(address=address[0], port=address[1]))
def accept_connection(self, address, port):
return address in self.whitelisted_addresses
# vim:sw=4:ts=4:et:

92
platypush/backend/bluetooth/fileserver.py Normal file
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@ -0,0 +1,92 @@
import os
import stat
# noinspection PyPackageRequirements
from PyOBEX import requests, responses, headers
# noinspection PyPackageRequirements
from PyOBEX.server import BrowserServer
from platypush.backend.bluetooth import BluetoothBackend
from platypush.message.event.bluetooth import BluetoothFileGetRequestEvent
class BluetoothFileserverBackend(BluetoothBackend, BrowserServer):
"""
Bluetooth OBEX file server.
Enable it to allow bluetooth devices to browse files on this machine.
If you run platypush as a non-root user (and you should) then you to change the group owner of the
service discovery protocol file (/var/run/sdp) and add your user to that group. See
`here <https://stackoverflow.com/questions/34599703/rfcomm-bluetooth-permission-denied-error-raspberry-pi>`_
for details.
Requires:
* **pybluez** (``pip install pybluez``)
* **pyobex** (``pip install git+https://github.com/BlackLight/PyOBEX``)
"""
def __init__(self, port: int, address: str = '', directory: str = os.path.expanduser('~'),
whitelisted_addresses: list = None, **kwargs):
"""
:param port: Bluetooth listen port
:param address: Bluetooth address to bind the server to (default: any)
:param directory: Directory to share (default: HOME directory)
:param whitelisted_addresses: If set then only accept connections from the listed device addresses
"""
BluetoothBackend.__init__(self, address=address, port=port, directory=directory,
whitelisted_addresses=whitelisted_addresses, **kwargs)
if not os.path.isdir(self.directory):
raise FileNotFoundError(self.directory)
def process_request(self, socket, request, *address):
if isinstance(request, requests.Get):
self.bus.post(BluetoothFileGetRequestEvent(address=address[0], port=address[1]))
self.get(socket, request)
else:
super().process_request(socket, request, *address)
def get(self, socket, request):
name = ""
req_type = ""
for header in request.header_data:
if isinstance(header, headers.Name):
name = header.decode().strip("\x00")
self.logger.info("Receiving request for {}".format(name))
elif isinstance(header, headers.Type):
req_type = header.decode().strip("\x00")
self.logger.info("Request type: {}".format(req_type))
path = os.path.abspath(os.path.join(self.directory, name))
if os.path.isdir(path) or req_type == "x-obex/folder-listing":
if path.startswith(self.directory):
filelist = os.listdir(path)
s = '<?xml version="1.0"?>\n<folder-listing>\n'
for i in filelist:
objpath = os.path.join(path, i)
if os.path.isdir(objpath):
s += ' <folder name="{}" created="{}" />'.format(i, os.stat(objpath)[stat.ST_CTIME])
else:
s += ' <file name="{}" created="{}" size="{}" />'.format(
i, os.stat(objpath)[stat.ST_CTIME], os.stat(objpath)[stat.ST_SIZE])
s += "</folder-listing>\n"
self.logger.debug('Bluetooth get XML output:\n' + s)
response = responses.Success()
response_headers = [headers.Name(name.encode("utf8")),
headers.Length(len(s)),
headers.Body(s.encode("utf8"))]
BrowserServer.send_response(self, socket, response, response_headers)
else:
self._reject(socket)
else:
self._reject(socket)
# vim:sw=4:ts=4:et:

96
platypush/backend/bluetooth/pushserver.py
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@ -1,15 +1,12 @@
import os
import time
# noinspection PyPackageRequirements
from PyOBEX import headers, requests, responses, server
from PyOBEX.server import PushServer
from platypush.backend import Backend
from platypush.message.event.bluetooth import BluetoothDeviceConnectedEvent, BluetoothFileReceivedEvent, \
BluetoothDeviceDisconnectedEvent, BluetoothFilePutRequestEvent
from platypush.backend.bluetooth import BluetoothBackend
class BluetoothPushserverBackend(Backend, server.PushServer):
class BluetoothPushserverBackend(BluetoothBackend, PushServer):
"""
Bluetooth OBEX push server.
Enable it to allow bluetooth file transfers from other devices.
@ -37,95 +34,14 @@ class BluetoothPushserverBackend(Backend, server.PushServer):
:param directory: Destination directory where files will be downloaded (default: ~/bluetooth)
:param whitelisted_addresses: If set then only accept connections from the listed device addresses
"""
Backend.__init__(self, **kwargs)
server.PushServer.__init__(self, address=address)
self.port = port
self.directory = os.path.join(os.path.expanduser(directory))
self.whitelisted_addresses = whitelisted_addresses or []
self._sock = None
BluetoothBackend.__init__(self, address=address, port=port, directory=directory,
whitelisted_addresses=whitelisted_addresses, **kwargs)
def run(self):
super().run()
if not os.path.isdir(self.directory):
os.makedirs(self.directory, exist_ok=True)
self.logger.info('Started bluetooth push service [address={}] [port={}]'.format(
self.address, self.port))
while not self.should_stop():
try:
self._sock = self.start_service(self.port)
self.serve(self._sock)
except Exception as e:
self.logger.error('Error on bluetooth connection [address={}] [port={}]: {}'.format(
self.address, self.port, str(e)))
time.sleep(self._sleep_on_error)
finally:
self.stop()
def stop(self):
if self._sock:
self.stop_service(self._sock)
self._sock = None
def put(self, socket, request):
name = ""
body = ""
while True:
for header in request.header_data:
if isinstance(header, headers.Name):
name = header.decode()
self.logger.info("Receiving {}".format(name))
elif isinstance(header, headers.Length):
length = header.decode()
self.logger.info("Content length: {} bytes".format(length))
elif isinstance(header, headers.Body):
body += header.decode()
elif isinstance(header, headers.End_Of_Body):
body += header.decode()
if request.is_final():
break
# Ask for more data.
self.send_response(socket, responses.Continue())
# Get the next part of the data.
request = self.request_handler.decode(socket)
self.send_response(socket, responses.Success())
name = os.path.basename(name.strip("\x00"))
path = os.path.join(self.directory, name)
self.logger.info("Writing file {}" .format(path))
open(path, "wb").write(body.encode())
self.bus.post(BluetoothFileReceivedEvent(path=path))
def process_request(self, connection, request, *address):
"""Processes the request from the connection.
This method should be reimplemented in subclasses to add support for
more request types.
"""
if isinstance(request, requests.Connect):
self.connect(connection, request)
self.bus.post(BluetoothDeviceConnectedEvent(address=address[0], port=address[1]))
elif isinstance(request, requests.Disconnect):
self.disconnect(connection)
self.bus.post(BluetoothDeviceDisconnectedEvent(address=address[0], port=address[1]))
elif isinstance(request, requests.Put):
self.bus.post(BluetoothFilePutRequestEvent(address=address[0], port=address[1]))
self.put(connection, request)
else:
self._reject(connection)
self.bus.post(BluetoothFilePutRequestEvent(address=address[0], port=address[1]))
def accept_connection(self, address, port):
return address in self.whitelisted_addresses
super().run()
# vim:sw=4:ts=4:et:

8
platypush/message/event/bluetooth.py
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@ -37,6 +37,14 @@ class BluetoothFilePutRequestEvent(Event):
super().__init__(*args, address=address, port=port, **kwargs)
class BluetoothFileGetRequestEvent(Event):
"""
Event triggered on bluetooth device file transfer get request
"""
def __init__(self, address: str = None, port: str = None, *args, **kwargs):
super().__init__(*args, address=address, port=port, **kwargs)
class BluetoothFileReceivedEvent(Event):
"""
Event triggered on bluetooth device file transfer put request