def printer_print_api():
printer = hardware.Printer.query.get(1)
pixels = image_encoding.default_pipeline(
templating.default_template(flask.request.data))
hardware_message = messages.SetDeliveryAndPrint(
device_address=printer.device_address,
pixels=pixels,
)
# If a printer is "offline" then we won't find the printer
# connected and success will be false.
success, next_print_id = protocol_loop.send_message(
printer.device_address, hardware_message)
if success:
flask.flash('Sent your message to the printer!')
stats.inc('printer.print.ok')
else:
flask.flash(("Could not send message because the "
"printer {} is offline.").format(printer.name),
'error')
stats.inc('printer.print.offline')
# We know immediately if the printer wasn't online.
if not success:
model_message.failure_message = 'Printer offline'
model_message.response_timestamp = datetime.datetime.utcnow()
db.session.add(model_message)
return 'ok'
def preview_api():
message = flask.request.data.decode('utf-8')
pixels = image_encoding.default_pipeline(
templating.default_template(message))
png = io.BytesIO()
pixels.save(png, "PNG")
stats.inc('printer.preview')
return '<img style="width: 100%;" src="data:image/png;base64,{}">'.format(base64.b64encode(png.getvalue()))
def print_html(self, html, from_name, face='default'):
from sirius.protocol import protocol_loop
from sirius.protocol import messages
from sirius.coding import image_encoding
from sirius.coding import templating
from sirius import stats
from sirius.models import messages as model_messages
pixels = image_encoding.default_pipeline(
templating.default_template(html, from_name=from_name)
)
hardware_message = None
if face == "noface":
hardware_message = messages.SetDeliveryAndPrintNoFace(
device_address=self.device_address,
pixels=pixels,
)
else:
hardware_message = messages.SetDeliveryAndPrint(
device_address=self.device_address,
pixels=pixels,
)
# If a printer is "offline" then we won't find the printer
# connected and success will be false.
success, next_print_id = protocol_loop.send_message(
self.device_address,
hardware_message
)
if success:
stats.inc('printer.print.ok')
else:
stats.inc('printer.print.offline')
# Store the same message in the database.
png = io.BytesIO()
pixels.save(png, "PNG")
model_message = model_messages.Message(
print_id=next_print_id,
pixels=bytearray(png.getvalue()),
sender_name=from_name,
target_printer=self,
)
# We know immediately if the printer wasn't online.
if not success:
model_message.failure_message = 'Printer offline'
model_message.response_timestamp = datetime.datetime.utcnow()
db.session.add(model_message)
if not success:
raise Printer.OfflineError()
def imageprint(printer_id):
printer = hardware.Printer.query.get(printer_id)
if printer is None:
flask.abort(404)
form = PrintForm()
if flask.request.method == 'POST':
pixels = image_encoding.image_pipeline(max(glob.iglob('/var/upload/*'), key=os.path.getctime))
##################
hardware_message = messages.SetDeliveryAndPrint(
device_address=printer.device_address,
pixels=pixels,
)
# If a printer is "offline" then we won't find the printer
# connected and success will be false.
success, next_print_id = protocol_loop.send_message(
printer.device_address, hardware_message)
if success:
flask.flash('Sent your message to the printer!')
stats.inc('printer.print.ok')
else:
flask.flash(("Could not send message because the "
"printer {} is offline.").format(printer.name),
'error')
stats.inc('printer.print.offline')
# Store the same message in the database.
png = io.BytesIO()
pixels.save(png, "PNG")
model_message = model_messages.Message(
print_id=next_print_id,
pixels=bytearray(png.getvalue()),
sender_id=login.current_user.id,
target_printer=printer,
)
# We know immediately if the printer wasn't online.
if not success:
model_message.failure_message = 'Printer offline'
model_message.response_timestamp = datetime.datetime.utcnow()
db.session.add(model_message)
return flask.redirect(flask.url_for(
'printer_overview.printer_overview',
printer_id=printer.id))
return flask.render_template(
'printer_print_file.html',
printer=printer,
form=form
)
def preview(user_id, username, printer_id):
assert user_id == login.current_user.id
assert username == login.current_user.username
message = flask.request.data.decode('utf-8')
pixels = image_encoding.default_pipeline(
templating.default_template(message, from_name=login.current_user.username))
png = io.BytesIO()
pixels.save(png, "PNG")
stats.inc('printer.preview')
return '<img style="width: 100%;" src="data:image/png;base64,{}">'.format(base64.b64encode(png.getvalue()).decode('utf-8'))
def preview(user_id, username, printer_id):
assert user_id == login.current_user.id
assert username == login.current_user.username
message = flask.request.data.decode('utf-8')
pixels = image_encoding.default_pipeline(
templating.default_template(message))
png = io.BytesIO()
pixels.save(png, "PNG")
stats.inc('printer.preview')
return '<img style="width: 100%;" src="data:image/png;base64,{}">'.format(base64.b64encode(png.getvalue()))
def _decoder_loop(ws):
"""We run one decoder loop for every connected web socket. The first
message is always PowerOn which contains a bridge_address.
:param ws: A gevent websocket object.
"""
while True:
raw_data = ws.receive()
if raw_data is None:
break # websocket closed by client
try:
data = json.loads(raw_data)
except ValueError:
stats.inc('json_decode_error.count')
yield messages.MalformedEvent(raw_data, 'Could not decode json.')
yield decoders.decode_message(data)
def _decoder_loop(ws):
"""We run one decoder loop for every connected web socket. The first
message is always PowerOn which contains a bridge_address.
:param ws: A gevent websocket object.
"""
while True:
raw_data = ws.receive()
if raw_data is None:
break # websocket closed by client
try:
data = json.loads(raw_data)
except ValueError:
stats.inc('json_decode_error.count')
yield messages.MalformedEvent(raw_data, 'Could not decode json.')
yield decoders.decode_message(data)
def _accept_step(x, bridge_state):
"""Handle a single decoded message. This is in its own function to
simplify testing and to keep the if/elif indentation low.
:param x: A type from sirius.protocol.message
:param bridge_state: The BridgeState for this connection
"""
if type(x) == DeviceConnect:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
elif type(x) == DeviceDisconnect:
bridge_state.mark_dead(x.device_address)
elif type(x) == model_messages.BridgeLog:
pass # TODO - write log to a place
elif type(x) == EncryptionKeyRequired:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
claim_code = hardware.Printer.get_claim_code(x.device_address)
if claim_code is None:
# It's OK to have an unclaimed device, we just ignore it
# for now.
stats.inc('unclaimed.encryption_key_required.count')
return
add_key = AddDeviceEncryptionKey(
bridge_address=x.bridge_address,
device_address=x.device_address,
claim_code=claim_code,
)
send_message(x.device_address, add_key)
elif type(x) == DeviceHeartbeat:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
elif type(x) == PowerOn:
logging.info('Received superfluous PowerOn message. '
'Probably backlog from previous socket error.')
elif type(x) == DeviceDidPowerOn:
# We don't really care about this one other than for debugging
# maybe.
bridge_state.mark_alive(x.device_address)
elif type(x) == DeviceDidPrint:
# TODO - This message is sent for two reasons:
# 1) The user pressed the button and nothing was in the queue
# "hello, I don't have anything to print [...]"
# 2) We printed a queued job.
# In case 2 we want to ack the print in the database.
pass
elif type(x) == BridgeCommandResponse:
if x.command_id not in bridge_state.pending_commands:
logger.error('Unexpected response (command_id not known) %r', x)
return
logger.debug('Got BridgeCommandResponse, ignoring.')
elif type(x) == DeviceCommandResponse:
if x.command_id not in bridge_state.pending_commands:
logger.error('Unexpected response (command_id not known) %r', x)
return
logger.debug('Ack-ing message with print_id %s', x.command_id)
model_messages.Message.ack(x.return_code, x.command_id)
else:
assert False, "Unexpected message {}".format(x)
def accept(ws):
"""Receiving loop for a single websocket. We're storing the websocket
in a BridgeState class keyed on the bridge address. This is
necessary to later find connected devices in `send_message`.
:param ws: A gevent websocket object.
"""
loop = _decoder_loop(ws)
power_on = loop.next()
# stats & logging
stats.inc('accepted.count')
stats.inc('by_type.{}.count'.format(type(power_on).__name__))
logger.info("New connection from %r.", power_on)
# Note that there is a potential race condition. If the bridge
# responds to command_id 0 over a restart we may receive that
# response just after we have sent out a command with id 0, but
# it's the wrong response from an earlier command.
bridge_state = BridgeState(websocket=ws, address=power_on.bridge_address)
bridge_by_address[power_on.bridge_address] = bridge_state
try:
for message in loop:
# stats & logging
stats.inc('received.count')
stats.inc('by_type.{}.count'.format(type(message).__name__))
logger.debug("Received %r.", message)
_accept_step(message, bridge_state)
# If the iterator closes normally then the client closed the
# socket and we clean up normally.
stats.inc('client_closed.count')
except:
stats.inc('protocol_loop_exception.count')
logger.exception("Unexpected bridge error.")
raise
finally:
logger.debug("Bridge disonnected: %r.", bridge_state)
del bridge_by_address[power_on.bridge_address]
def printer_print(printer_id):
printer = hardware.Printer.query.get(printer_id)
if printer is None:
flask.abort(404)
# PERMISSIONS
# the printer must either belong to this user, or be
# owned by a friend
if printer.owner.id == login.current_user.id:
# fine
pass
elif printer.id in [p.id for p in login.current_user.friends_printers()]:
# fine
pass
else:
flask.abort(404)
form = PrintForm()
# Note that the form enforces access permissions: People can't
# submit a valid printer-id that's not owned by the user or one of
# the user's friends.
choices = [(x.id, x.name) for x in login.current_user.printers] + [
(x.id, x.name) for x in login.current_user.friends_printers()
]
form.target_printer.choices = choices
# Set default printer on get
if flask.request.method != 'POST':
form.target_printer.data = printer.id
if form.validate_on_submit():
# TODO: move image encoding into a pthread.
# TODO: use templating to avoid injection attacks
pixels = image_encoding.default_pipeline(
templating.default_template(form.message.data))
hardware_message = messages.SetDeliveryAndPrint(
device_address=printer.device_address,
pixels=pixels,
)
# If a printer is "offline" then we won't find the printer
# connected and success will be false.
success, next_print_id = protocol_loop.send_message(
printer.device_address, hardware_message)
if success:
flask.flash('Sent your message to the printer!')
stats.inc('printer.print.ok')
else:
flask.flash(("Could not send message because the "
"printer {} is offline.").format(printer.name),
'error')
stats.inc('printer.print.offline')
# Store the same message in the database.
png = io.BytesIO()
pixels.save(png, "PNG")
model_message = model_messages.Message(
print_id=next_print_id,
pixels=bytearray(png.getvalue()),
sender_id=login.current_user.id,
target_printer=printer,
)
# We know immediately if the printer wasn't online.
if not success:
model_message.failure_message = 'Printer offline'
model_message.response_timestamp = datetime.datetime.utcnow()
db.session.add(model_message)
return flask.redirect(
flask.url_for('printer_overview.printer_overview',
printer_id=printer.id))
return flask.render_template(
'printer_print.html',
printer=printer,
form=form,
)
def printer_print(printer_id):
printer = hardware.Printer.query.get(printer_id)
if printer is None:
flask.abort(404)
# PERMISSIONS
# the printer must either belong to this user, or be
# owned by a friend
if printer.owner.id == login.current_user.id:
# fine
pass
elif printer.id in [p.id for p in login.current_user.friends_printers()]:
# fine
pass
else:
flask.abort(404)
form = PrintForm()
# Note that the form enforces access permissions: People can't
# submit a valid printer-id that's not owned by the user or one of
# the user's friends.
choices = [
(x.id, x.name) for x in login.current_user.printers
] + [
(x.id, x.name) for x in login.current_user.friends_printers()
]
form.target_printer.choices = choices
# Set default printer on get
if flask.request.method != 'POST':
form.target_printer.data = printer.id
if form.validate_on_submit():
# TODO: move image encoding into a pthread.
# TODO: use templating to avoid injection attacks
pixels = image_encoding.default_pipeline(
templating.default_template(form.message.data))
hardware_message = messages.SetDeliveryAndPrint(
device_address=printer.device_address,
pixels=pixels,
)
# If a printer is "offline" then we won't find the printer
# connected and success will be false.
success, next_print_id = protocol_loop.send_message(
printer.device_address, hardware_message)
if success:
flask.flash('Sent your message to the printer!')
stats.inc('printer.print.ok')
else:
flask.flash(("Could not send message because the "
"printer {} is offline.").format(printer.name),
'error')
stats.inc('printer.print.offline')
# Store the same message in the database.
png = io.BytesIO()
pixels.save(png, "PNG")
model_message = model_messages.Message(
print_id=next_print_id,
pixels=bytearray(png.getvalue()),
sender_id=login.current_user.id,
target_printer=printer,
)
# We know immediately if the printer wasn't online.
if not success:
model_message.failure_message = 'Printer offline'
model_message.response_timestamp = datetime.datetime.utcnow()
db.session.add(model_message)
return flask.redirect(flask.url_for(
'printer_overview.printer_overview',
printer_id=printer.id))
return flask.render_template(
'printer_print.html',
printer=printer,
form=form,
)
def _accept_step(x, bridge_state):
"""Handle a single decoded message. This is in its own function to
simplify testing and to keep the if/elif indentation low.
:param x: A type from sirius.protocol.message
:param bridge_state: The BridgeState for this connection
"""
if type(x) == messages.DeviceConnect:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
elif type(x) == messages.DeviceDisconnect:
bridge_state.mark_dead(x.device_address)
elif type(x) == messages.BridgeLog:
pass # TODO - write log to a place
elif type(x) == messages.EncryptionKeyRequired:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
claim_code = hardware.Printer.get_claim_code(x.device_address)
if claim_code is None:
# It's OK to have an unclaimed device, we just ignore it
# for now.
stats.inc('unclaimed.encryption_key_required.count')
return
add_key = messages.AddDeviceEncryptionKey(
bridge_address=x.bridge_address,
device_address=x.device_address,
claim_code=claim_code,
)
send_message(x.device_address, add_key)
elif type(x) == messages.DeviceHeartbeat:
hardware.Printer.phone_home(x.device_address)
bridge_state.mark_alive(x.device_address)
elif type(x) == messages.PowerOn:
logging.info('Received superfluous PowerOn message. '
'Probably backlog from previous socket error.')
elif type(x) == messages.DeviceDidPowerOn:
# We don't really care about this one other than for debugging
# maybe.
bridge_state.mark_alive(x.device_address)
elif type(x) == messages.DeviceDidPrint:
# TODO - This message is sent for two reasons:
# 1) The user pressed the button and nothing was in the queue
# "hello, I don't have anything to print [...]"
# 2) We printed a queued job.
# In case 2 we want to ack the print in the database.
pass
elif type(x) == messages.BridgeCommandResponse:
if x.command_id not in bridge_state.pending_commands:
logger.error('Unexpected response (command_id not known) %r', x)
return
logger.debug('Got BridgeCommandResponse, ignoring.')
elif type(x) == messages.DeviceCommandResponse:
if x.command_id not in bridge_state.pending_commands:
logger.error('Unexpected response (command_id not known) %r', x)
return
logger.debug('Ack-ing message with print_id %s', x.command_id)
model_messages.Message.ack(x.return_code, x.command_id)
else:
assert False, "Unexpected message {}".format(x)
def accept(ws):
"""Receiving loop for a single websocket. We're storing the websocket
in a BridgeState class keyed on the bridge address. This is
necessary to later find connected devices in `send_message`.
:param ws: A gevent websocket object.
"""
loop = _decoder_loop(ws)
power_on = loop.next()
# stats & logging
stats.inc('accepted.count')
stats.inc('by_type.{}.count'.format(type(power_on).__name__))
logger.info("New connection from %r.", power_on)
# Note that there is a potential race condition. If the bridge
# responds to command_id 0 over a restart we may receive that
# response just after we have sent out a command with id 0, but
# it's the wrong response from an earlier command.
bridge_state = BridgeState(websocket=ws, address=power_on.bridge_address)
bridge_by_address[power_on.bridge_address] = bridge_state
try:
for message in loop:
# stats & logging
stats.inc('received.count')
stats.inc('by_type.{}.count'.format(type(message).__name__))
logger.debug("Received %r.", message)
_accept_step(message, bridge_state)
# If the iterator closes normally then the client closed the
# socket and we clean up normally.
stats.inc('client_closed.count')
except:
stats.inc('protocol_loop_exception.count')
logger.exception("Unexpected bridge error.")
raise
finally:
logger.debug("Bridge disonnected: %r.", bridge_state)
del bridge_by_address[power_on.bridge_address]
def accept(ws):
"""Receiving loop for a single websocket. We're storing the websocket
in a BridgeState class keyed on the bridge address. This is
necessary to later find connected devices in `send_message`.
:param ws: A gevent websocket object.
"""
loop = _decoder_loop(ws)
power_on = loop.next()
# stats & logging
stats.inc('accepted.count')
stats.inc('by_type.{}.count'.format(type(power_on).__name__))
logger.info("New connection from %r.", power_on)
# Note that there is a potential race condition. If the bridge
# responds to command_id 0 over a restart we may receive that
# response just after we have sent out a command with id 0, but
# it's the wrong response from an earlier command.
bridge_state = BridgeState(websocket=ws, address=power_on.bridge_address)
bridge_by_address[power_on.bridge_address] = bridge_state
try:
for message in loop:
# stats & logging
stats.inc('received.count')
stats.inc('by_type.{}.count'.format(type(message).__name__))
logger.debug("Received %r.", message)
# make sure the bridge_state is still in the bridge_by_address dict.
# (my theory is that the same bridge can lose a connection and make a
# second connection before this loop realises the first connection
# is gone. when the first one does finally error, it removes the
# second's entry instead of its own.)
bridge_by_address[power_on.bridge_address] = bridge_state
_accept_step(message, bridge_state)
# don't keep an idle session running inside this loop,
# otherwise it uses a DB connection for every connected bridge
db.session.remove()
# If the iterator closes normally then the client closed the
# socket and we clean up normally.
stats.inc('client_closed.count')
except:
stats.inc('protocol_loop_exception.count')
logger.exception("Unexpected bridge error.")
raise
finally:
logger.debug("Bridge disonnected: %r.", bridge_state)
db.session.remove()
del bridge_by_address[power_on.bridge_address]
