def browser_page(request):
"""
return list of offlink node that cover by a border router
"""
lists_offlink_nodes = get_list_of_nodes()
lists_offlink_nodes_json = json.dumps(lists_offlink_nodes, cls=DjangoJSONEncoder)
if request.method == "POST":
gatewayaddress = str(request.POST["gatewayaddress"])
nodes = None
if gatewayaddress:
management = sensornetwork.management()
nodes = management.offlink_nodes(gatewayaddress)
if nodes:
offlink_nodes = OfflinkNodes(border_router_address=gatewayaddress, node_list=nodes)
offlink_nodes.save()
for node in nodes:
node_object, created = Node.objects.get_or_create(ip_address=node)
if created:
node_object.save()
return render_to_response(
'browser/browser_page.html',
{'gatewayaddress': gatewayaddress,
'lastlistsofnodes': lists_offlink_nodes_json,
'nodes': nodes,},
RequestContext(request),
)
else:
return render_to_response(
'browser/browser_page.html',
{'lastlistsofnodes': lists_offlink_nodes_json,},
RequestContext(request))
def node_page(request, node):
"""
provide node information. if the information not found in the db, use snmp (or any means) to retrive
input: update or not, (json input from ajax)
output: json data
"""
UPDATE = False
node_infor = None
if not UPDATE:
try:
node_object = Node.objects.filter(ip_address=node).order_by('-date')[:1][0]
node_infor = Infor.objects.filter(node=node_object).order_by('-date')[0]
except:
print "Unexpected error:", sys.exc_info()[0]
node_infor = None
if UPDATE or not node_infor:
try:
node_object = Node.objects.filter(ip_address=node).order_by('-date')[:1][0]
except:
print "Node with ip=%s not in the db: %s" %(node, sys.exc_info()[0])
node_object = None
management = sensornetwork.management()
node_items = ast.literal_eval(management.discovery_node(node))
print node_items
#save to db when node_items contain value, and node is in the Node
if node_items and node_object:
node_infor = Infor(node=node_object,
sys_descr = node_items.get('sysdescr'),
sys_name = node_items.get('sysname'),
if_phys_addr = node_items.get('ifphyaddr'),
ent_physical_descr = node_items.get('phydescr'),
)
node_infor.save()
#for consistance display between the NON Update and Update
node_infor = Infor.objects.filter(node=node_object).order_by('-date')[:1][0]
#prepare for json response
node_items_json = None
if node_infor:
node_items_data = {}
node_items_data['data'] = {}
node_items_data['data']['ip_address'] = node
node_items_data['data']['sys_descr'] = node_infor.sys_descr
node_items_data['data']['sys_name'] = node_infor.sys_name
node_items_data['data']['if_phys_addr'] = node_infor.if_phys_addr
node_items_data['data']['ent_physical_descr'] = node_infor.ent_physical_descr
node_items_data['data']['physensor_type'] = node_infor.physensor_type
node_items_data['data']['physensor_unit_display'] = node_infor.physensor_unit_display
node_items_data['update'] = calendar.timegm(node_infor.date.utctimetuple())*1000 #timestamp in js is in ms
node_items_json = json.dumps(node_items_data, cls=DjangoJSONEncoder)
return HttpResponse(node_items_json, content_type="application/json")
def _collect_node(node, command):
"""
start/stop collecting (collectd) with node
node: node address
command: START/STOP
"""
management = sensornetwork.management()
management.collect_node(node, command)
status = {}
status['status'] = 'success'
return json.dumps(status, cls=DjangoJSONEncoder)
def _collect_all(command):
"""
request to start/stop the collectd from all nodes
which is manage by the gateway
command = START/STOP
"""
offlink_nodes = get_list_of_nodes()
nodes = offlink_nodes.get('nodes')
if nodes != None:
management = sensornetwork.management()
management.collect_all(nodes, command) #command = START/STOP
#TODO: check the reply for status
status = {}
status['status'] = 'success'
return json.dumps(status, cls=DjangoJSONEncoder)