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341 lines
10 KiB
341 lines
10 KiB
from django.conf import settings
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from django.template.loader import render_to_string
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from django.utils import timezone
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import json
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import requests
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from six.moves.urllib.parse import quote
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from hc.accounts.models import Profile
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from hc.lib import emails
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def tmpl(template_name, **ctx):
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template_path = "integrations/%s" % template_name
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# \xa0 is non-breaking space. It causes SMS messages to use UCS2 encoding
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# and cost twice the money.
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return render_to_string(template_path, ctx).strip().replace(u"\xa0", " ")
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class Transport(object):
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def __init__(self, channel):
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self.channel = channel
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def notify(self, check):
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""" Send notification about current status of the check.
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This method returns None on success, and error message
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on error.
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"""
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raise NotImplementedError()
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def is_noop(self, check):
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""" Return True if transport will ignore check's current status.
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This method is overriden in Webhook subclass where the user can
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configure webhook urls for "up" and "down" events, and both are
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optional.
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"""
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return False
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def checks(self):
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return self.channel.user.check_set.order_by("created")
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class Email(Transport):
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def notify(self, check, bounce_url):
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if not self.channel.email_verified:
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return "Email not verified"
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headers = {"X-Bounce-Url": bounce_url}
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try:
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# Look up the sorting preference for this email address
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p = Profile.objects.get(user__email=self.channel.value)
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sort = p.sort
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except Profile.DoesNotExist:
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# Default sort order is by check's creation time
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sort = "created"
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ctx = {
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"check": check,
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"checks": self.checks(),
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"sort": sort,
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"now": timezone.now(),
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"unsub_link": self.channel.get_unsub_link()
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}
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emails.alert(self.channel.value, ctx, headers)
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def is_noop(self, check):
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return not self.channel.email_verified
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class HttpTransport(Transport):
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@classmethod
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def _request(cls, method, url, **kwargs):
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try:
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options = dict(kwargs)
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options["timeout"] = 5
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if "headers" not in options:
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options["headers"] = {}
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if "User-Agent" not in options["headers"]:
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options["headers"]["User-Agent"] = "healthchecks.io"
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r = requests.request(method, url, **options)
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if r.status_code not in (200, 201, 204):
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return "Received status code %d" % r.status_code
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except requests.exceptions.Timeout:
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# Well, we tried
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return "Connection timed out"
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except requests.exceptions.ConnectionError:
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return "Connection failed"
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@classmethod
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def get(cls, url, **kwargs):
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# Make 3 attempts--
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for x in range(0, 3):
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error = cls._request("get", url, **kwargs)
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if error is None:
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break
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return error
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@classmethod
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def post(cls, url, **kwargs):
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# Make 3 attempts--
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for x in range(0, 3):
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error = cls._request("post", url, **kwargs)
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if error is None:
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break
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return error
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class Webhook(HttpTransport):
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def prepare(self, template, check, urlencode=False):
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""" Replace variables with actual values.
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There should be no bad translations if users use $ symbol in
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check's name or tags, because $ gets urlencoded to %24
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"""
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def safe(s):
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return quote(s) if urlencode else s
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result = template
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if "$CODE" in result:
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result = result.replace("$CODE", str(check.code))
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if "$STATUS" in result:
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result = result.replace("$STATUS", check.status)
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if "$NOW" in result:
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s = timezone.now().replace(microsecond=0).isoformat()
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result = result.replace("$NOW", safe(s))
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if "$NAME" in result:
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result = result.replace("$NAME", safe(check.name))
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if "$TAG" in result:
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for i, tag in enumerate(check.tags_list()):
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placeholder = "$TAG%d" % (i + 1)
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result = result.replace(placeholder, safe(tag))
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return result
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def is_noop(self, check):
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if check.status == "down" and not self.channel.url_down:
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return True
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if check.status == "up" and not self.channel.url_up:
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return True
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return False
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def notify(self, check):
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url = self.channel.url_down
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if check.status == "up":
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url = self.channel.url_up
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assert url
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url = self.prepare(url, check, urlencode=True)
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headers = {}
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for key, value in self.channel.headers.items():
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headers[key] = self.prepare(value, check)
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if self.channel.post_data:
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payload = self.prepare(self.channel.post_data, check)
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return self.post(url, data=payload.encode("utf-8"), headers=headers)
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else:
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return self.get(url, headers=headers)
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class Slack(HttpTransport):
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def notify(self, check):
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text = tmpl("slack_message.json", check=check)
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payload = json.loads(text)
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return self.post(self.channel.slack_webhook_url, json=payload)
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class HipChat(HttpTransport):
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def notify(self, check):
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text = tmpl("hipchat_message.json", check=check)
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payload = json.loads(text)
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self.channel.refresh_hipchat_access_token()
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return self.post(self.channel.hipchat_webhook_url, json=payload)
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class OpsGenie(HttpTransport):
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def notify(self, check):
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payload = {
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"apiKey": self.channel.value,
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"alias": str(check.code),
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"source": "healthchecks.io"
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}
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if check.status == "down":
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payload["tags"] = ",".join(check.tags_list())
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payload["message"] = tmpl("opsgenie_message.html", check=check)
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payload["note"] = tmpl("opsgenie_note.html", check=check)
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url = "https://api.opsgenie.com/v1/json/alert"
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if check.status == "up":
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url += "/close"
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return self.post(url, json=payload)
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class PagerDuty(HttpTransport):
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URL = "https://events.pagerduty.com/generic/2010-04-15/create_event.json"
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def notify(self, check):
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description = tmpl("pd_description.html", check=check)
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payload = {
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"vendor": settings.PD_VENDOR_KEY,
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"service_key": self.channel.pd_service_key,
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"incident_key": str(check.code),
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"event_type": "trigger" if check.status == "down" else "resolve",
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"description": description,
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"client": settings.SITE_NAME,
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"client_url": settings.SITE_ROOT
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}
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return self.post(self.URL, json=payload)
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class Pushbullet(HttpTransport):
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def notify(self, check):
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text = tmpl("pushbullet_message.html", check=check)
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url = "https://api.pushbullet.com/v2/pushes"
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headers = {
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"Access-Token": self.channel.value,
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"Conent-Type": "application/json"
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}
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payload = {
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"type": "note",
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"title": "healthchecks.io",
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"body": text
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}
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return self.post(url, json=payload, headers=headers)
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class Pushover(HttpTransport):
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URL = "https://api.pushover.net/1/messages.json"
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def notify(self, check):
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others = self.checks().filter(status="down").exclude(code=check.code)
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ctx = {
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"check": check,
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"down_checks": others,
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}
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text = tmpl("pushover_message.html", **ctx)
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title = tmpl("pushover_title.html", **ctx)
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user_key, prio = self.channel.value.split("|")
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payload = {
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"token": settings.PUSHOVER_API_TOKEN,
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"user": user_key,
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"message": text,
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"title": title,
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"html": 1,
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"priority": int(prio),
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}
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# Emergency notification
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if prio == "2":
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payload["retry"] = settings.PUSHOVER_EMERGENCY_RETRY_DELAY
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payload["expire"] = settings.PUSHOVER_EMERGENCY_EXPIRATION
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return self.post(self.URL, data=payload)
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class VictorOps(HttpTransport):
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def notify(self, check):
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description = tmpl("victorops_description.html", check=check)
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mtype = "CRITICAL" if check.status == "down" else "RECOVERY"
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payload = {
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"entity_id": str(check.code),
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"message_type": mtype,
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"entity_display_name": check.name_then_code(),
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"state_message": description,
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"monitoring_tool": "healthchecks.io",
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}
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return self.post(self.channel.value, json=payload)
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class Discord(HttpTransport):
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def notify(self, check):
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text = tmpl("slack_message.json", check=check)
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payload = json.loads(text)
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url = self.channel.discord_webhook_url + "/slack"
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return self.post(url, json=payload)
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class Telegram(HttpTransport):
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SM = "https://api.telegram.org/bot%s/sendMessage" % settings.TELEGRAM_TOKEN
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@classmethod
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def send(cls, chat_id, text):
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return cls.post(cls.SM, json={
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"chat_id": chat_id,
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"text": text,
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"parse_mode": "html"
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})
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def notify(self, check):
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text = tmpl("telegram_message.html", check=check)
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return self.send(self.channel.telegram_id, text)
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class Sms(HttpTransport):
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URL = 'https://api.twilio.com/2010-04-01/Accounts/%s/Messages.json'
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def is_noop(self, check):
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return check.status != "down"
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def notify(self, check):
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profile = Profile.objects.for_user(self.channel.user)
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if not profile.authorize_sms():
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return "Monthly SMS limit exceeded"
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url = self.URL % settings.TWILIO_ACCOUNT
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auth = (settings.TWILIO_ACCOUNT, settings.TWILIO_AUTH)
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text = tmpl("sms_message.html", check=check,
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site_name=settings.SITE_NAME)
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data = {
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'From': settings.TWILIO_FROM,
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'To': self.channel.value,
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'Body': text,
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}
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return self.post(url, data=data, auth=auth)
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