def get_qr_queue(host=celeryconfig.SERVER_HOST):
if not is_bootstrapped:
bootstrap()
res = Resource(host, manager=manager)
auth_params = {'username':celeryconfig.ZPRINTER_USERNAME, 'api_key': celeryconfig.ZPRINTER_API_KEY}
r = res.get('/api/zebra_queue/', params_dict=auth_params)
json = simplejson.loads(r.body_string())
if len(printer_dict.keys()) == 0:
get_printers()
if len(json['objects']) > 0:
for instance in json['objects']:
uri = instance['resource_uri']
zpl_code= instance['zpl_code']
printer_uri = instance['destination_printer']
printer_ip = printer_dict[printer_uri]['ip_address']
printer_port = printer_dict[printer_uri]['port']
instance['fulfilled_date'] = datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%S.000")
res.put(uri, simplejson.dumps(instance), headers={'Content-Type': 'application/json'}, params_dict=auth_params)
do_send(printer_ip, printer_port, zpl_code, recv=False)
else:
logging.debug("no jobs")
def set_alert_destination():
"""Set the printer alert endpoing to this host's listening port
"""
listener_ip_address = celeryconfig.ZPRINTER_PROXY
#listener_ip_address = '192.168.10.20' # actual setup
listener_port = 9111
if len(printer_dict.keys()) == 0:
get_printers()
alert_text="""
^XA
^SX*,D,Y,Y,%s,9111
^XZ
""" % (listener_ip_address)
for k,v in printer_dict.items():
host = v['ip_address']
port = v['port']
do_send(host, port, alert_text)
def get_printer_heartbeat():
"""
Task to actively monitor the printer's status (vs. waiting to get alerts)
"""
if len(printer_dict.keys()) == 0:
get_printers()
msg_text = """^XA^HH^XZ"""
for k,v in printer_dict.items():
print_host = v['ip_address']
print_port = v['port']
printer_uri = v['resource_uri']
info = do_send(print_host, print_port, msg_text, recv=True)
#prepare the rest resource for sending info to server
res = Resource(celeryconfig.SERVER_HOST, manager=manager)
auth_params = {'username':celeryconfig.ZPRINTER_USERNAME, 'api_key': celeryconfig.ZPRINTER_API_KEY}
new_instance = dict()
new_instance['printer'] = printer_uri
new_instance['event_date'] = datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%S.000")
new_instance['status'] = 'printer uptime heartbeat'
if info is None or info == False:
#failed to reach printer or receive data
new_instance['is_cleared'] = False
elif isinstance(info, str):
#it's a string with info
if info.count('ZPL MODE') > 0:
#we got diagnostic info from printer
new_instance['is_cleared'] = True
else:
#something else, error
new_instance['is_cleared'] = False
try:
res.post('api/zebra_status/', simplejson.dumps(new_instance), headers={'Content-Type': 'application/json'}, params_dict=auth_params)
except Exception, ex:
logging.error("Error trying to post heartbeat to host %s" % ex)
