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import datetime
import six
try:
from django.contrib.sites.requests import RequestSite
except ImportError: # Django < 1.9
from django.contrib.sites.models import RequestSite
from django.core.exceptions import ObjectDoesNotExist
from django.core.serializers.json import DjangoJSONEncoder
from django.forms.models import model_to_dict
from django.shortcuts import render, get_object_or_404
from django.utils.timezone import now
from graphite.util import json, epoch, epoch_to_dt, jsonResponse, HttpError, HttpResponse
from graphite.events.models import Event
from graphite.render.attime import parseATTime
class EventEncoder(json.JSONEncoder):
def default(self, obj):
if isinstance(obj, datetime.datetime):
return epoch(obj)
return json.JSONEncoder.default(self, obj)
def view_events(request):
if request.method == 'GET':
context = {'events': fetch(request),
'site': RequestSite(request),
'protocol': 'https' if request.is_secure() else 'http'}
return render(request, 'events.html', context)
else:
return post_event(request)
@jsonResponse(encoder=DjangoJSONEncoder)
def jsonDetail(request, queryParams, event_id):
try:
e = Event.objects.get(id=event_id)
e.tags = e.tags.split()
return model_to_dict(e)
except ObjectDoesNotExist:
raise HttpError('Event matching query does not exist', status=404)
def detail(request, event_id):
if request.META.get('HTTP_ACCEPT') == 'application/json':
return jsonDetail(request, event_id)
e = get_object_or_404(Event, pk=event_id)
context = {'event': e}
return render(request, 'event.html', context)
def post_event(request):
if request.method == 'POST':
event = json.loads(request.body)
assert isinstance(event, dict)
tags = event.get('tags')
if tags is not None:
if isinstance(tags, list):
tags = ' '.join(tags)
elif not isinstance(tags, six.string_types):
return HttpResponse(
json.dumps({'error': '"tags" must be an array or space-separated string'}),
status=400)
else:
tags = None
if 'when' in event:
when = epoch_to_dt(event['when'])
else:
when = now()
Event.objects.create(
what=event.get('what'),
tags=tags,
when=when,
data=event.get('data', ''),
)
return HttpResponse(status=200)
else:
return HttpResponse(status=405)
def get_data(request):
query_params = request.GET.copy()
query_params.update(request.POST)
if 'jsonp' in query_params:
response = HttpResponse(
"%s(%s)" % (query_params.get('jsonp'),
json.dumps(fetch(request), cls=EventEncoder)),
content_type='text/javascript')
else:
response = HttpResponse(
json.dumps(fetch(request), cls=EventEncoder),
content_type='application/json')
return response
def fetch(request):
if request.GET.get('from') is not None:
time_from = parseATTime(request.GET['from'])
else:
time_from = epoch_to_dt(0)
if request.GET.get('until') is not None:
time_until = parseATTime(request.GET['until'])
else:
time_until = now()
set_operation = request.GET.get('set')
tags = request.GET.get('tags')
if tags is not None:
tags = request.GET.get('tags').split(' ')
result = []
for x in Event.find_events(time_from, time_until, tags=tags, set_operation=set_operation):
# django-tagging's with_intersection() returns matches with unknown tags
# this is a workaround to ensure we only return positive matches
if set_operation == 'intersection':
if len(set(tags) & set(x.as_dict()['tags'])) == len(tags):
result.append(x.as_dict())
else:
result.append(x.as_dict())
return result
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