def get_variables(user):
variable_list = variable_list_django_db(user)
i = 0
while i < len(variable_list):
variable_list[i].value, variable_list[i].quality, variable_list[
i].access_rights, time = connect.read(variable_list[i].server,
variable_list[i].name)
i = i + 1
return variable_list
def read_update(request):
json_data={"variables":[]}
variable_list=get_variables(request.user)
for e in variable_list:
dict={}
dict['server']=e.server
dict['name']=e.name
dict['value'],dict['quality'],dict['access_rights'],time=connect.read(e.server,e.name)
json_data['variables'].append(dict)
return HttpResponse(json.dumps(json_data), mimetype='application/json')
def read_update(request):
json_data = {"variables": []}
variable_list = get_variables(request.user)
for e in variable_list:
dict = {}
dict['server'] = e.server
dict['name'] = e.name
dict['value'], dict['quality'], dict[
'access_rights'], time = connect.read(e.server, e.name)
json_data['variables'].append(dict)
return HttpResponse(json.dumps(json_data), mimetype='application/json')
def json_graph_live (request):
if request.method == 'POST':
json_data = simplejson.loads(request.body)
try:
data = json_data['data'][0]
except KeyError:
return HttpResponseServerError("Malformed data!")
data=check_json_data(request)
dict={}
dict['value'],dict['quality'],access_rights,dict['time']=connect.read(data['server'],data['name'])
return HttpResponse(json.dumps(dict), mimetype='application/json')
def json_graph_live(request):
if request.method == 'POST':
json_data = simplejson.loads(request.body)
try:
data = json_data['data'][0]
except KeyError:
return HttpResponseServerError("Malformed data!")
data = check_json_data(request)
dict = {}
dict['value'], dict['quality'], access_rights, dict['time'] = connect.read(
data['server'], data['name'])
return HttpResponse(json.dumps(dict), mimetype='application/json')
def alarm(server,name,condition,value_limit,email):
value,quality,access_rights,time=connect.read(server,name) #Lectura del valor del ciente opc
if condition=='greater':
value_limit=float(value_limit) #La variable se convierte de string a float
value=float(value) #La variable se convierte de string a float
if value > value_limit:
send_mail('Online Scada Alarm', 'The variable ' + str(name) + ' on server ' + str(server) + ' is greater than its value limit '+ str(value_limit) +
'. The actual value is '+str(value)+'.','*****@*****.**',[str(email)], fail_silently=False)
if condition=='less':
value_limit=float(value_limit)
value=float(value)
if value < value_limit:
send_mail('Online Scada Alarm', 'The variable ' + str(name) + ' on server ' + str(server) + ' is lesser than its value limit '+ str(value_limit)+
'. The actual value is '+str(value)+'.','*****@*****.**',['*****@*****.**'], fail_silently=False)
if condition=='equal':
value_limit=float(value_limit)
value=float(value)
if value == value_limit:
send_mail('Online Scada Alarm', 'The variable ' + str(name) + ' on server ' + str(server) + ' is equal to its limit '+ str(value_limit),
'*****@*****.**',['*****@*****.**'], fail_silently=False)
if condition=='not equal':
value_limit=float(value_limit)
value=float(value)
if value != value_limit:
send_mail('Online Scada Alarm', 'The variable ' + str(name) + ' on server ' + str(server) + ' is not equal to '+ str(value_limit)+
'. The actual value is '+str(value)+'.','*****@*****.**',['*****@*****.**'], fail_silently=False)
return
def store_value(server,name):
value,quality,access_rights,time=connect.read(server,name)
t = TimeSeries(server=server, name=name, value=value, time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"))
t.save()
return
def get_writable_variables(user):
variable_list=variable_list_django_db(user)
i=0
while i<len(variable_list):
variable_list[i].value,variable_list[i].quality,variable_list[i].access_rights,time=connect.read(variable_list[i].server,variable_list[i].name)
if variable_list[i].access_rights =='Read':
del variable_list[i]
i=i+1
return variable_list
