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223 lines
6.3 KiB
223 lines
6.3 KiB
from datetime import timedelta as td
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from django.db import connection
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from django.db.models import F
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from django.http import (HttpResponse, HttpResponseForbidden,
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HttpResponseNotFound, JsonResponse)
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from django.shortcuts import get_object_or_404
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from django.utils import timezone
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from django.views.decorators.cache import never_cache
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from django.views.decorators.csrf import csrf_exempt
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from django.views.decorators.http import require_POST
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from hc.api import schemas
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from hc.api.decorators import check_api_key, uuid_or_400, validate_json
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from hc.api.models import Check, Notification, Ping
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from hc.lib.badges import check_signature, get_badge_svg
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@csrf_exempt
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@uuid_or_400
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@never_cache
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def ping(request, code):
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check = get_object_or_404(Check, code=code)
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check.n_pings = F("n_pings") + 1
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check.last_ping = timezone.now()
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check.last_ping_body = request.body[:10000]
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check.alert_after = check.get_alert_after()
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if check.status in ("new", "paused"):
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check.status = "up"
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check.save()
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check.refresh_from_db()
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ping = Ping(owner=check)
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headers = request.META
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ping.n = check.n_pings
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remote_addr = headers.get("HTTP_X_FORWARDED_FOR", headers["REMOTE_ADDR"])
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ping.remote_addr = remote_addr.split(",")[0]
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ping.scheme = headers.get("HTTP_X_FORWARDED_PROTO", "http")
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ping.method = headers["REQUEST_METHOD"]
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# If User-Agent is longer than 200 characters, truncate it:
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ping.ua = headers.get("HTTP_USER_AGENT", "")[:200]
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ping.save()
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response = HttpResponse("OK")
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response["Access-Control-Allow-Origin"] = "*"
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return response
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def _lookup(user, spec):
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unique_fields = spec.get("unique", [])
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if unique_fields:
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existing_checks = Check.objects.filter(user=user)
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if "name" in unique_fields:
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existing_checks = existing_checks.filter(name=spec.get("name"))
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if "tags" in unique_fields:
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existing_checks = existing_checks.filter(tags=spec.get("tags"))
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if "timeout" in unique_fields:
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timeout = td(seconds=spec["timeout"])
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existing_checks = existing_checks.filter(timeout=timeout)
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if "grace" in unique_fields:
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grace = td(seconds=spec["grace"])
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existing_checks = existing_checks.filter(grace=grace)
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return existing_checks.first()
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def _update(check, spec):
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if "name" in spec:
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check.name = spec["name"]
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if "tags" in spec:
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check.tags = spec["tags"]
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if "timeout" in spec and "schedule" not in spec:
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check.kind = "simple"
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check.timeout = td(seconds=spec["timeout"])
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if "grace" in spec:
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check.grace = td(seconds=spec["grace"])
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if "schedule" in spec:
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check.kind = "cron"
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check.schedule = spec["schedule"]
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if "tz" in spec:
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check.tz = spec["tz"]
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check.save()
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# This needs to be done after saving the check, because of
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# the M2M relation between checks and channels:
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if "channels" in spec:
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if spec["channels"] == "*":
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check.assign_all_channels()
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elif spec["channels"] == "":
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check.channel_set.clear()
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return check
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@csrf_exempt
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@check_api_key
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@validate_json(schemas.check)
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def checks(request):
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if request.method == "GET":
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q = Check.objects.filter(user=request.user)
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tags = set(request.GET.getlist("tag"))
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for tag in tags:
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# approximate filtering by tags
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q = q.filter(tags__contains=tag)
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checks = []
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for check in q:
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# precise, final filtering
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if not tags or check.matches_tag_set(tags):
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checks.append(check.to_dict())
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return JsonResponse({"checks": checks})
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elif request.method == "POST":
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created = False
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check = _lookup(request.user, request.json)
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if check is None:
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num_checks = Check.objects.filter(user=request.user).count()
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if num_checks >= request.user.profile.check_limit:
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return HttpResponseForbidden()
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check = Check(user=request.user)
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created = True
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_update(check, request.json)
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return JsonResponse(check.to_dict(), status=201 if created else 200)
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# If request is neither GET nor POST, return "405 Method not allowed"
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return HttpResponse(status=405)
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@csrf_exempt
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@uuid_or_400
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@check_api_key
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@validate_json(schemas.check)
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def update(request, code):
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check = get_object_or_404(Check, code=code)
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if check.user != request.user:
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return HttpResponseForbidden()
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if request.method == "POST":
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_update(check, request.json)
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return JsonResponse(check.to_dict())
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elif request.method == "DELETE":
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response = check.to_dict()
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check.delete()
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return JsonResponse(response)
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# Otherwise, method not allowed
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return HttpResponse(status=405)
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@csrf_exempt
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@require_POST
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@uuid_or_400
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@check_api_key
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def pause(request, code):
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check = get_object_or_404(Check, code=code)
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if check.user != request.user:
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return HttpResponseForbidden()
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check.status = "paused"
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check.save()
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return JsonResponse(check.to_dict())
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@never_cache
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def badge(request, username, signature, tag, format="svg"):
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if not check_signature(username, tag, signature):
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return HttpResponseNotFound()
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status = "up"
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q = Check.objects.filter(user__username=username, tags__contains=tag)
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for check in q:
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if tag not in check.tags_list():
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continue
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if status == "up" and check.in_grace_period():
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status = "late"
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if check.get_status() == "down":
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status = "down"
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break
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if format == "json":
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return JsonResponse({"status": status})
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svg = get_badge_svg(tag, status)
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return HttpResponse(svg, content_type="image/svg+xml")
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@csrf_exempt
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@uuid_or_400
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def bounce(request, code):
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notification = get_object_or_404(Notification, code=code)
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# If webhook is more than 10 minutes late, don't accept it:
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td = timezone.now() - notification.created
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if td.total_seconds() > 600:
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return HttpResponseForbidden()
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notification.error = request.body[:200]
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notification.save()
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return HttpResponse()
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def status(request):
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with connection.cursor() as c:
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c.execute("SELECT 1")
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c.fetchone()
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return HttpResponse("OK")
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