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from django.shortcuts import render
from django.http import HttpResponse
from django.contrib.auth.decorators import login_required
from django.contrib.auth import authenticate
from django.contrib.auth import login as LOGIN
from sbhs_server.tables.models import Slot, Account, Experiment, Booking
import json, datetime, os, time
from django.views.decorators.csrf import csrf_exempt
from sbhs_server import settings
# Create your views here.
#
def check_connection(req):
""" Checks if the connection exists or not.
Input: req:request object.
Output: HttpResponse object.
"""
return HttpResponse("TESTOK")
@csrf_exempt
def initial_login(req):
""" Logs in an user for conducting the experiment on the specified board.
Input: req:request object.
Output: HttpResponse object.
"""
username = req.POST.get("username")
rpi_ip = ''
try:
assigned_mid = Account.objects.select_related().get(username=username).board.mid
except Exception as e:
return HttpResponse(json.dumps({"STATUS": 400, "MESSAGE": {"IS_IP":"1","DATA":"Invalid username"}}))
rpi_ip = settings.pi_ip_map.get(str(assigned_mid))
if rpi_ip is None:
return HttpResponse(json.dumps({"STATUS": 400, "MESSAGE": {"IS_IP": "1", "DATA":"Board is currently offline"}}))
return HttpResponse(json.dumps({"STATUS": 200, "MESSAGE": {"IS_IP":"1","DATA":rpi_ip}}))
@csrf_exempt
def reset(req):
""" Resets an experiment.
Input: req:request object.
Output: HttpResponse object.
"""
try:
from sbhs_server.settings import boards
user = req.user
if user.is_authenticated():
key = str(user.board.mid)
experiment = Experiment.objects.select_related().filter(id=boards[key]["experiment_id"])
if len(experiment) == 1 and user == experiment[0].booking.account:
experiment = experiment[0]
now = datetime.datetime.now()
endtime = experiment.booking.end_time()
boards[key]["board"].setHeat(0)
boards[key]["board"].setFan(100)
log_data(boards[key]["board"], key, experiment.id, 0, 100)
if endtime < now:
boards[key]["experiment_id"] = None
except:
pass
return HttpResponse("")
def client_version(req):
""" Input: req:request object.
Output: HttpResponse object.
"""
return HttpResponse("3")
@login_required(redirect_field_name=None)
def logs(req):
""" Renders experimental log files to the user interface.
Input: req:request object.
Output: HttpResponse object.
"""
bookings = Booking.objects.only("id").filter(account__id=req.user.id)
deleted_bookings = Booking.trash.only("id").filter(account__id=req.user.id)
bookings = list(bookings) + list(deleted_bookings)
booking_ids = [b.id for b in bookings]
experiments = Experiment.objects.select_related("booking", "booking__slot").filter(booking_id__in=booking_ids)
for e in experiments:
e.logname = e.log.split("/")[-1]
return render(req, "experiment/logs.html", {"experiments": reversed(experiments)})
@login_required(redirect_field_name=None)
def download_log(req, experiment_id, fn):
""" Downloads the experimental log file.
Input: req: request object, experiment_id: experimental id, fn: filename.
Output: HttpResponse object
"""
try:
experiment_data = Experiment.objects.select_related("booking", "booking__account").get(id=experiment_id)
assert req.user.id == experiment_data.booking.account.id
f = open(os.path.join(settings.EXPERIMENT_LOGS_DIR, experiment_data.log), "r")
data = f.read()
f.close()
return HttpResponse(data, content_type='text/text')
except:
return HttpResponse("Requested log file doesn't exist.")
def log_data(sbhs, mid, experiment_id, heat=None, fan=None, temp=None):
""" Update the experimental log file.
Input: sbhs:board object, mid: machine-id of the SBHS, experiment_id: experimental id, heat: heater value, fan: fan value, temp: temperature.
"""
if heat is None:
heat = sbhs.getHeat()
if fan is None:
fan = sbhs.getFan()
if temp is None:
temp = sbhs.getTemp()
data = "%f %s %s %s\n" % (time.time(), str(heat), str(fan), str(temp))
experiment_logfile = Experiment.objects.get(id=experiment_id).log
global_logfile = settings.SBHS_GLOBAL_LOG_DIR + "/" + str(mid) + ".log"
with open(global_logfile, "a") as global_loghandler, open(experiment_logfile, "a") as experiment_loghandler:
global_loghandler.write(data)
experiment_loghandler.write(data)
def validate_log_file(req):
""" Validates the experimental log file.
Input: req: request object.
Output: HttpResponse object.
"""
import hashlib
data = req.POST.get("data")
data = data.strip().split("\n")
clean_data = ""
for line in data:
columns = line.split(" ")
if len(columns) >= 6:
clean_data += (" ".join(columns[0:6]) + "\n")
checksum = hashlib.sha1(clean_data).hexdigest()
try:
e = Experiment.objects.get(checksum=checksum)
return HttpResponse("TRUE")
except:
return HttpResponse("FALSE")
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