Files
superset2/superset/tasks/schedules.py
Daniel Vaz Gaspar 4dd1d1df5e fix(thumbnails): missing field, logging and new config var (#10562)
* fix(thumbnails): missing field, logging and new config var

* deprecate EMAIL_REPORTS_WEBDRIVER

* fix after merge and conflicts

* fix tests

* black
2020-08-14 14:12:44 +01:00

809 lines
25 KiB
Python

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
"""Utility functions used across Superset"""
import logging
import time
import urllib.request
from collections import namedtuple
from datetime import datetime, timedelta
from email.utils import make_msgid, parseaddr
from typing import (
Any,
Callable,
Dict,
Iterator,
NamedTuple,
Optional,
Tuple,
TYPE_CHECKING,
Union,
)
from urllib.error import URLError # pylint: disable=ungrouped-imports
import croniter
import pandas as pd
import simplejson as json
from celery.app.task import Task
from dateutil.tz import tzlocal
from flask import current_app, render_template, url_for
from flask_babel import gettext as __
from retry.api import retry_call
from selenium.common.exceptions import WebDriverException
from selenium.webdriver import chrome, firefox
from selenium.webdriver.remote.webdriver import WebDriver
from sqlalchemy.exc import NoSuchColumnError, ResourceClosedError
from superset import app, db, security_manager, thumbnail_cache
from superset.extensions import celery_app, machine_auth_provider_factory
from superset.models.alerts import Alert, AlertLog
from superset.models.core import Database
from superset.models.dashboard import Dashboard
from superset.models.schedules import (
EmailDeliveryType,
get_scheduler_model,
ScheduleType,
SliceEmailReportFormat,
)
from superset.models.slice import Slice
from superset.sql_parse import ParsedQuery
from superset.tasks.slack_util import deliver_slack_msg
from superset.utils.core import get_email_address_list, send_email_smtp
from superset.utils.screenshots import ChartScreenshot, WebDriverProxy
from superset.utils.urls import get_url_path
# pylint: disable=too-few-public-methods
if TYPE_CHECKING:
# pylint: disable=unused-import
from werkzeug.datastructures import TypeConversionDict
from flask_appbuilder.security.sqla.models import User
# Globals
config = app.config
logger = logging.getLogger("tasks.email_reports")
logger.setLevel(logging.INFO)
stats_logger = current_app.config["STATS_LOGGER"]
EMAIL_PAGE_RENDER_WAIT = config["EMAIL_PAGE_RENDER_WAIT"]
WEBDRIVER_BASEURL = config["WEBDRIVER_BASEURL"]
WEBDRIVER_BASEURL_USER_FRIENDLY = config["WEBDRIVER_BASEURL_USER_FRIENDLY"]
ReportContent = namedtuple(
"EmailContent",
[
"body", # email body
"data", # attachments
"images", # embedded images for the email
"slack_message", # html not supported, only markdown
# attachments for the slack message, embedding not supported
"slack_attachment",
],
)
class ScreenshotData(NamedTuple):
url: str # url to chat/dashboard for this screenshot
image: Optional[bytes] # bytes for the screenshot
class AlertContent(NamedTuple):
label: str # alert name
sql: str # sql statement for alert
alert_url: str # url to alert details
image_data: Optional[ScreenshotData] # data for the alert screenshot
def _get_email_to_and_bcc(
recipients: str, deliver_as_group: bool
) -> Iterator[Tuple[str, str]]:
bcc = config["EMAIL_REPORT_BCC_ADDRESS"]
if deliver_as_group:
to = recipients
yield (to, bcc)
else:
for to in get_email_address_list(recipients):
yield (to, bcc)
# TODO(bkyryliuk): move email functionality into a separate module.
def _deliver_email( # pylint: disable=too-many-arguments
recipients: str,
deliver_as_group: bool,
subject: str,
body: str,
data: Optional[Dict[str, Any]],
images: Optional[Dict[str, bytes]],
) -> None:
for (to, bcc) in _get_email_to_and_bcc(recipients, deliver_as_group):
send_email_smtp(
to,
subject,
body,
config,
data=data,
images=images,
bcc=bcc,
mime_subtype="related",
dryrun=config["SCHEDULED_EMAIL_DEBUG_MODE"],
)
def _generate_report_content(
delivery_type: EmailDeliveryType, screenshot: bytes, name: str, url: str
) -> ReportContent:
data: Optional[Dict[str, Any]]
# how to: https://api.slack.com/reference/surfaces/formatting
slack_message = __(
"""
*%(name)s*\n
<%(url)s|Explore in Superset>
""",
name=name,
url=url,
)
if delivery_type == EmailDeliveryType.attachment:
images = None
data = {"screenshot": screenshot}
body = __(
'<b><a href="%(url)s">Explore in Superset</a></b><p></p>',
name=name,
url=url,
)
elif delivery_type == EmailDeliveryType.inline:
# Get the domain from the 'From' address ..
# and make a message id without the < > in the ends
domain = parseaddr(config["SMTP_MAIL_FROM"])[1].split("@")[1]
msgid = make_msgid(domain)[1:-1]
images = {msgid: screenshot}
data = None
body = __(
"""
<b><a href="%(url)s">Explore in Superset</a></b><p></p>
<img src="cid:%(msgid)s">
""",
name=name,
url=url,
msgid=msgid,
)
return ReportContent(body, data, images, slack_message, screenshot)
def _get_url_path(view: str, user_friendly: bool = False, **kwargs: Any) -> str:
with app.test_request_context():
base_url = (
WEBDRIVER_BASEURL_USER_FRIENDLY if user_friendly else WEBDRIVER_BASEURL
)
return urllib.parse.urljoin(str(base_url), url_for(view, **kwargs))
def create_webdriver() -> WebDriver:
return WebDriverProxy(driver_type=config["WEBDRIVER_TYPE"]).auth(get_reports_user())
def get_reports_user() -> "User":
return security_manager.find_user(config["EMAIL_REPORTS_USER"])
def destroy_webdriver(
driver: Union[chrome.webdriver.WebDriver, firefox.webdriver.WebDriver]
) -> None:
"""
Destroy a driver
"""
# This is some very flaky code in selenium. Hence the retries
# and catch-all exceptions
try:
retry_call(driver.close, tries=2)
except Exception: # pylint: disable=broad-except
pass
try:
driver.quit()
except Exception: # pylint: disable=broad-except
pass
def deliver_dashboard(
dashboard_id: int,
recipients: Optional[str],
slack_channel: Optional[str],
delivery_type: EmailDeliveryType,
deliver_as_group: bool,
) -> None:
"""
Given a schedule, delivery the dashboard as an email report
"""
dashboard = db.session.query(Dashboard).filter_by(id=dashboard_id).one()
dashboard_url = _get_url_path(
"Superset.dashboard", dashboard_id_or_slug=dashboard.id
)
dashboard_url_user_friendly = _get_url_path(
"Superset.dashboard", user_friendly=True, dashboard_id_or_slug=dashboard.id
)
# Create a driver, fetch the page, wait for the page to render
driver = create_webdriver()
window = config["WEBDRIVER_WINDOW"]["dashboard"]
driver.set_window_size(*window)
driver.get(dashboard_url)
time.sleep(EMAIL_PAGE_RENDER_WAIT)
# Set up a function to retry once for the element.
# This is buggy in certain selenium versions with firefox driver
get_element = getattr(driver, "find_element_by_class_name")
element = retry_call(
get_element, fargs=["grid-container"], tries=2, delay=EMAIL_PAGE_RENDER_WAIT
)
try:
screenshot = element.screenshot_as_png
except WebDriverException:
# Some webdrivers do not support screenshots for elements.
# In such cases, take a screenshot of the entire page.
screenshot = driver.screenshot() # pylint: disable=no-member
finally:
destroy_webdriver(driver)
# Generate the email body and attachments
report_content = _generate_report_content(
delivery_type,
screenshot,
dashboard.dashboard_title,
dashboard_url_user_friendly,
)
subject = __(
"%(prefix)s %(title)s",
prefix=config["EMAIL_REPORTS_SUBJECT_PREFIX"],
title=dashboard.dashboard_title,
)
if recipients:
_deliver_email(
recipients,
deliver_as_group,
subject,
report_content.body,
report_content.data,
report_content.images,
)
if slack_channel:
deliver_slack_msg(
slack_channel,
subject,
report_content.slack_message,
report_content.slack_attachment,
)
def _get_slice_data(slc: Slice, delivery_type: EmailDeliveryType) -> ReportContent:
slice_url = _get_url_path(
"Superset.explore_json", csv="true", form_data=json.dumps({"slice_id": slc.id})
)
# URL to include in the email
slice_url_user_friendly = _get_url_path(
"Superset.slice", slice_id=slc.id, user_friendly=True
)
# Login on behalf of the "reports" user in order to get cookies to deal with auth
auth_cookies = machine_auth_provider_factory.instance.get_auth_cookies(
get_reports_user()
)
# Build something like "session=cool_sess.val;other-cookie=awesome_other_cookie"
cookie_str = ";".join([f"{key}={val}" for key, val in auth_cookies.items()])
opener = urllib.request.build_opener()
opener.addheaders.append(("Cookie", cookie_str))
response = opener.open(slice_url)
if response.getcode() != 200:
raise URLError(response.getcode())
# TODO: Move to the csv module
content = response.read()
rows = [r.split(b",") for r in content.splitlines()]
if delivery_type == EmailDeliveryType.inline:
data = None
# Parse the csv file and generate HTML
columns = rows.pop(0)
with app.app_context(): # type: ignore
body = render_template(
"superset/reports/slice_data.html",
columns=columns,
rows=rows,
name=slc.slice_name,
link=slice_url_user_friendly,
)
elif delivery_type == EmailDeliveryType.attachment:
data = {__("%(name)s.csv", name=slc.slice_name): content}
body = __(
'<b><a href="%(url)s">Explore in Superset</a></b><p></p>',
name=slc.slice_name,
url=slice_url_user_friendly,
)
# how to: https://api.slack.com/reference/surfaces/formatting
slack_message = __(
"""
*%(slice_name)s*\n
<%(slice_url_user_friendly)s|Explore in Superset>
""",
slice_name=slc.slice_name,
slice_url_user_friendly=slice_url_user_friendly,
)
return ReportContent(body, data, None, slack_message, content)
def _get_slice_screenshot(slice_id: int) -> ScreenshotData:
slice_obj = db.session.query(Slice).get(slice_id)
chart_url = get_url_path("Superset.slice", slice_id=slice_obj.id, standalone="true")
screenshot = ChartScreenshot(chart_url, slice_obj.digest)
image_url = _get_url_path(
"Superset.slice", user_friendly=True, slice_id=slice_obj.id,
)
user = security_manager.find_user(current_app.config["THUMBNAIL_SELENIUM_USER"])
image_data = screenshot.compute_and_cache(
user=user, cache=thumbnail_cache, force=True,
)
db.session.commit()
return ScreenshotData(image_url, image_data)
def _get_slice_visualization(
slc: Slice, delivery_type: EmailDeliveryType
) -> ReportContent:
# Create a driver, fetch the page, wait for the page to render
driver = create_webdriver()
window = config["WEBDRIVER_WINDOW"]["slice"]
driver.set_window_size(*window)
slice_url = _get_url_path("Superset.slice", slice_id=slc.id)
slice_url_user_friendly = _get_url_path(
"Superset.slice", slice_id=slc.id, user_friendly=True
)
driver.get(slice_url)
time.sleep(EMAIL_PAGE_RENDER_WAIT)
# Set up a function to retry once for the element.
# This is buggy in certain selenium versions with firefox driver
element = retry_call(
driver.find_element_by_class_name,
fargs=["chart-container"],
tries=2,
delay=EMAIL_PAGE_RENDER_WAIT,
)
try:
screenshot = element.screenshot_as_png
except WebDriverException:
# Some webdrivers do not support screenshots for elements.
# In such cases, take a screenshot of the entire page.
screenshot = driver.screenshot() # pylint: disable=no-member
finally:
destroy_webdriver(driver)
# Generate the email body and attachments
return _generate_report_content(
delivery_type, screenshot, slc.slice_name, slice_url_user_friendly
)
def deliver_slice( # pylint: disable=too-many-arguments
slice_id: int,
recipients: Optional[str],
slack_channel: Optional[str],
delivery_type: EmailDeliveryType,
email_format: SliceEmailReportFormat,
deliver_as_group: bool,
) -> None:
"""
Given a schedule, delivery the slice as an email report
"""
slc = db.session.query(Slice).filter_by(id=slice_id).one()
if email_format == SliceEmailReportFormat.data:
report_content = _get_slice_data(slc, delivery_type)
elif email_format == SliceEmailReportFormat.visualization:
report_content = _get_slice_visualization(slc, delivery_type)
else:
raise RuntimeError("Unknown email report format")
subject = __(
"%(prefix)s %(title)s",
prefix=config["EMAIL_REPORTS_SUBJECT_PREFIX"],
title=slc.slice_name,
)
if recipients:
_deliver_email(
recipients,
deliver_as_group,
subject,
report_content.body,
report_content.data,
report_content.images,
)
if slack_channel:
deliver_slack_msg(
slack_channel,
subject,
report_content.slack_message,
report_content.slack_attachment,
)
@celery_app.task(
name="email_reports.send",
bind=True,
soft_time_limit=config["EMAIL_ASYNC_TIME_LIMIT_SEC"],
)
def schedule_email_report( # pylint: disable=unused-argument
task: Task,
report_type: ScheduleType,
schedule_id: int,
recipients: Optional[str] = None,
slack_channel: Optional[str] = None,
) -> None:
model_cls = get_scheduler_model(report_type)
schedule = db.create_scoped_session().query(model_cls).get(schedule_id)
# The user may have disabled the schedule. If so, ignore this
if not schedule or not schedule.active:
logger.info("Ignoring deactivated schedule")
return
recipients = recipients or schedule.recipients
slack_channel = slack_channel or schedule.slack_channel
logger.info(
"Starting report for slack: %s and recipients: %s.", slack_channel, recipients
)
if report_type == ScheduleType.dashboard:
deliver_dashboard(
schedule.dashboard_id,
recipients,
slack_channel,
schedule.delivery_type,
schedule.deliver_as_group,
)
elif report_type == ScheduleType.slice:
deliver_slice(
schedule.slice_id,
recipients,
slack_channel,
schedule.delivery_type,
schedule.email_format,
schedule.deliver_as_group,
)
else:
raise RuntimeError("Unknown report type")
@celery_app.task(
name="alerts.run_query",
bind=True,
soft_time_limit=config["EMAIL_ASYNC_TIME_LIMIT_SEC"],
# TODO: find cause of https://github.com/apache/incubator-superset/issues/10530
# and remove retry
autoretry_for=(NoSuchColumnError, ResourceClosedError,),
retry_kwargs={"max_retries": 5},
retry_backoff=True,
)
def schedule_alert_query( # pylint: disable=unused-argument
task: Task,
report_type: ScheduleType,
schedule_id: int,
recipients: Optional[str] = None,
slack_channel: Optional[str] = None,
) -> None:
model_cls = get_scheduler_model(report_type)
try:
schedule = db.session.query(model_cls).get(schedule_id)
# The user may have disabled the schedule. If so, ignore this
if not schedule or not schedule.active:
logger.info("Ignoring deactivated alert")
return
if report_type == ScheduleType.alert:
if recipients or slack_channel:
deliver_alert(schedule.id, recipients, slack_channel)
return
if run_alert_query(
schedule.id, schedule.database_id, schedule.sql, schedule.label
):
# deliver_dashboard OR deliver_slice
return
else:
raise RuntimeError("Unknown report type")
except NoSuchColumnError as column_error:
stats_logger.incr("run_alert_task.error.nosuchcolumnerror")
raise column_error
except ResourceClosedError as resource_error:
stats_logger.incr("run_alert_task.error.resourceclosederror")
raise resource_error
class AlertState:
ERROR = "error"
TRIGGER = "trigger"
PASS = "pass"
def deliver_alert(
alert_id: int, recipients: Optional[str] = None, slack_channel: Optional[str] = None
) -> None:
alert = db.session.query(Alert).get(alert_id)
logging.info("Triggering alert: %s", alert)
recipients = recipients or alert.recipients
slack_channel = slack_channel or alert.slack_channel
if alert.slice:
alert_content = AlertContent(
alert.label,
alert.sql,
_get_url_path("AlertModelView.show", user_friendly=True, pk=alert_id),
_get_slice_screenshot(alert.slice.id),
)
else:
# TODO: dashboard delivery!
alert_content = AlertContent(
alert.label,
alert.sql,
_get_url_path("AlertModelView.show", user_friendly=True, pk=alert_id),
None,
)
if recipients:
deliver_email_alert(alert_content, recipients)
if slack_channel:
deliver_slack_alert(alert_content, slack_channel)
def deliver_email_alert(alert_content: AlertContent, recipients: str) -> None:
# TODO add sql query results to email
subject = f"[Superset] Triggered alert: {alert_content.label}"
deliver_as_group = False
data = None
images = {}
# TODO(JasonD28): add support for emails with no screenshot
image_url = None
if alert_content.image_data:
image_url = alert_content.image_data.url
if alert_content.image_data.image:
images = {"screenshot": alert_content.image_data.image}
body = render_template(
"email/alert.txt",
alert_url=alert_content.alert_url,
label=alert_content.label,
sql=alert_content.sql,
image_url=image_url,
)
_deliver_email(recipients, deliver_as_group, subject, body, data, images)
def deliver_slack_alert(alert_content: AlertContent, slack_channel: str) -> None:
subject = __("[Alert] %(label)s", label=alert_content.label)
image = None
if alert_content.image_data:
slack_message = render_template(
"slack/alert.txt",
label=alert_content.label,
sql=alert_content.sql,
url=alert_content.image_data.url,
alert_url=alert_content.alert_url,
)
image = alert_content.image_data.image
else:
slack_message = render_template(
"slack/alert_no_screenshot.txt",
label=alert_content.label,
sql=alert_content.sql,
alert_url=alert_content.alert_url,
)
deliver_slack_msg(
slack_channel, subject, slack_message, image,
)
def run_alert_query(
alert_id: int, database_id: int, sql: str, label: str
) -> Optional[bool]:
"""
Execute alert.sql and return value if any rows are returned
"""
logger.info("Processing alert ID: %i", alert_id)
database = db.session.query(Database).get(database_id)
if not database:
logger.error("Alert database not preset")
return None
if not sql:
logger.error("Alert SQL not preset")
return None
parsed_query = ParsedQuery(sql)
sql = parsed_query.stripped()
state = None
dttm_start = datetime.utcnow()
df = pd.DataFrame()
try:
logger.info("Evaluating SQL for alert <%s:%s>", alert_id, label)
df = database.get_df(sql)
except Exception as exc: # pylint: disable=broad-except
state = AlertState.ERROR
logging.exception(exc)
logging.error("Failed at evaluating alert: %s (%s)", label, alert_id)
dttm_end = datetime.utcnow()
last_eval_dttm = datetime.utcnow()
if state != AlertState.ERROR:
if not df.empty:
# Looking for truthy cells
for row in df.to_records():
if any(row):
state = AlertState.TRIGGER
deliver_alert(alert_id)
break
if not state:
state = AlertState.PASS
db.session.commit()
alert = db.session.query(Alert).get(alert_id)
if state != AlertState.ERROR:
alert.last_eval_dttm = last_eval_dttm
alert.last_state = state
alert.logs.append(
AlertLog(
scheduled_dttm=dttm_start,
dttm_start=dttm_start,
dttm_end=dttm_end,
state=state,
)
)
db.session.commit()
return None
def next_schedules(
crontab: str, start_at: datetime, stop_at: datetime, resolution: int = 0
) -> Iterator[datetime]:
crons = croniter.croniter(crontab, start_at - timedelta(seconds=1))
previous = start_at - timedelta(days=1)
for eta in crons.all_next(datetime):
# Do not cross the time boundary
if eta >= stop_at:
break
if eta < start_at:
continue
# Do not allow very frequent tasks
if eta - previous < timedelta(seconds=resolution):
continue
yield eta
previous = eta
def schedule_window(
report_type: str, start_at: datetime, stop_at: datetime, resolution: int
) -> None:
"""
Find all active schedules and schedule celery tasks for
each of them with a specific ETA (determined by parsing
the cron schedule for the schedule)
"""
model_cls = get_scheduler_model(report_type)
if not model_cls:
return None
dbsession = db.create_scoped_session()
schedules = dbsession.query(model_cls).filter(model_cls.active.is_(True))
for schedule in schedules:
logging.info("Processing schedule %s", schedule)
args = (report_type, schedule.id)
schedule_start_at = start_at
if (
hasattr(schedule, "last_eval_dttm")
and schedule.last_eval_dttm
and schedule.last_eval_dttm > start_at
):
schedule_start_at = schedule.last_eval_dttm + timedelta(seconds=1)
# Schedule the job for the specified time window
for eta in next_schedules(
schedule.crontab, schedule_start_at, stop_at, resolution=resolution
):
get_scheduler_action(report_type).apply_async(args, eta=eta) # type: ignore
break
return None
def get_scheduler_action(report_type: str) -> Optional[Callable[..., Any]]:
if report_type == ScheduleType.dashboard:
return schedule_email_report
if report_type == ScheduleType.slice:
return schedule_email_report
if report_type == ScheduleType.alert:
return schedule_alert_query
return None
@celery_app.task(name="email_reports.schedule_hourly")
def schedule_hourly() -> None:
""" Celery beat job meant to be invoked hourly """
if not config["ENABLE_SCHEDULED_EMAIL_REPORTS"]:
logger.info("Scheduled email reports not enabled in config")
return
resolution = config["EMAIL_REPORTS_CRON_RESOLUTION"] * 60
# Get the top of the hour
start_at = datetime.now(tzlocal()).replace(microsecond=0, second=0, minute=0)
stop_at = start_at + timedelta(seconds=3600)
schedule_window(ScheduleType.dashboard, start_at, stop_at, resolution)
schedule_window(ScheduleType.slice, start_at, stop_at, resolution)
@celery_app.task(name="alerts.schedule_check")
def schedule_alerts() -> None:
""" Celery beat job meant to be invoked every minute to check alerts """
resolution = 0
now = datetime.utcnow()
start_at = now - timedelta(
seconds=3600
) # process any missed tasks in the past hour
stop_at = now + timedelta(seconds=1)
schedule_window(ScheduleType.alert, start_at, stop_at, resolution)