You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
155 lines
8.5 KiB
155 lines
8.5 KiB
import threading
|
|
import queue
|
|
import time
|
|
|
|
from changedetectionio import content_fetcher
|
|
# A single update worker
|
|
#
|
|
# Requests for checking on a single site(watch) from a queue of watches
|
|
# (another process inserts watches into the queue that are time-ready for checking)
|
|
|
|
|
|
class update_worker(threading.Thread):
|
|
current_uuid = None
|
|
|
|
def __init__(self, q, notification_q, app, datastore, *args, **kwargs):
|
|
self.q = q
|
|
self.app = app
|
|
self.notification_q = notification_q
|
|
self.datastore = datastore
|
|
super().__init__(*args, **kwargs)
|
|
|
|
def run(self):
|
|
from changedetectionio import fetch_site_status
|
|
|
|
update_handler = fetch_site_status.perform_site_check(datastore=self.datastore)
|
|
|
|
while not self.app.config.exit.is_set():
|
|
|
|
try:
|
|
uuid = self.q.get(block=False)
|
|
except queue.Empty:
|
|
pass
|
|
|
|
else:
|
|
self.current_uuid = uuid
|
|
|
|
if uuid in list(self.datastore.data['watching'].keys()):
|
|
|
|
changed_detected = False
|
|
contents = ""
|
|
screenshot = False
|
|
update_obj= {}
|
|
now = time.time()
|
|
|
|
try:
|
|
changed_detected, update_obj, contents, screenshot = update_handler.run(uuid)
|
|
|
|
# Re #342
|
|
# In Python 3, all strings are sequences of Unicode characters. There is a bytes type that holds raw bytes.
|
|
# We then convert/.decode('utf-8') for the notification etc
|
|
if not isinstance(contents, (bytes, bytearray)):
|
|
raise Exception("Error - returned data from the fetch handler SHOULD be bytes")
|
|
except PermissionError as e:
|
|
self.app.logger.error("File permission error updating", uuid, str(e))
|
|
except content_fetcher.EmptyReply as e:
|
|
# Some kind of custom to-str handler in the exception handler that does this?
|
|
err_text = "EmptyReply: Status Code {}".format(e.status_code)
|
|
self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
|
|
'last_check_status': e.status_code})
|
|
except Exception as e:
|
|
self.app.logger.error("Exception reached processing watch UUID: %s - %s", uuid, str(e))
|
|
self.datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
|
|
|
|
else:
|
|
try:
|
|
watch = self.datastore.data['watching'][uuid]
|
|
fname = "" # Saved history text filename
|
|
|
|
# For the FIRST time we check a site, or a change detected, save the snapshot.
|
|
if changed_detected or not watch['last_checked']:
|
|
# A change was detected
|
|
fname = self.datastore.save_history_text(watch_uuid=uuid, contents=contents)
|
|
# Should always be keyed by string(timestamp)
|
|
self.datastore.update_watch(uuid, {"history": {str(round(time.time())): fname}})
|
|
|
|
# Generally update anything interesting returned
|
|
self.datastore.update_watch(uuid=uuid, update_obj=update_obj)
|
|
|
|
# A change was detected
|
|
if changed_detected:
|
|
n_object = {}
|
|
print (">> Change detected in UUID {} - {}".format(uuid, watch['url']))
|
|
|
|
# Notifications should only trigger on the second time (first time, we gather the initial snapshot)
|
|
if len(watch['history']) > 1:
|
|
|
|
dates = list(watch['history'].keys())
|
|
# Convert to int, sort and back to str again
|
|
# @todo replace datastore getter that does this automatically
|
|
dates = [int(i) for i in dates]
|
|
dates.sort(reverse=True)
|
|
dates = [str(i) for i in dates]
|
|
|
|
prev_fname = watch['history'][dates[1]]
|
|
|
|
|
|
# Did it have any notification alerts to hit?
|
|
if len(watch['notification_urls']):
|
|
print(">>> Notifications queued for UUID from watch {}".format(uuid))
|
|
n_object['notification_urls'] = watch['notification_urls']
|
|
n_object['notification_title'] = watch['notification_title']
|
|
n_object['notification_body'] = watch['notification_body']
|
|
n_object['notification_format'] = watch['notification_format']
|
|
|
|
# No? maybe theres a global setting, queue them all
|
|
elif len(self.datastore.data['settings']['application']['notification_urls']):
|
|
print(">>> Watch notification URLs were empty, using GLOBAL notifications for UUID: {}".format(uuid))
|
|
n_object['notification_urls'] = self.datastore.data['settings']['application']['notification_urls']
|
|
n_object['notification_title'] = self.datastore.data['settings']['application']['notification_title']
|
|
n_object['notification_body'] = self.datastore.data['settings']['application']['notification_body']
|
|
n_object['notification_format'] = self.datastore.data['settings']['application']['notification_format']
|
|
else:
|
|
print(">>> NO notifications queued, watch and global notification URLs were empty.")
|
|
|
|
# Only prepare to notify if the rules above matched
|
|
if 'notification_urls' in n_object:
|
|
# HTML needs linebreak, but MarkDown and Text can use a linefeed
|
|
if n_object['notification_format'] == 'HTML':
|
|
line_feed_sep = "</br>"
|
|
else:
|
|
line_feed_sep = "\n"
|
|
|
|
from changedetectionio import diff
|
|
n_object.update({
|
|
'watch_url': watch['url'],
|
|
'uuid': uuid,
|
|
'current_snapshot': contents.decode('utf-8'),
|
|
'diff': diff.render_diff(prev_fname, fname, line_feed_sep=line_feed_sep),
|
|
'diff_full': diff.render_diff(prev_fname, fname, True, line_feed_sep=line_feed_sep)
|
|
})
|
|
|
|
self.notification_q.put(n_object)
|
|
|
|
except Exception as e:
|
|
# Catch everything possible here, so that if a worker crashes, we don't lose it until restart!
|
|
print("!!!! Exception in update_worker !!!\n", e)
|
|
self.app.logger.error("Exception reached processing watch UUID: %s - %s", uuid, str(e))
|
|
self.datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
|
|
|
|
finally:
|
|
# Always record that we atleast tried
|
|
self.datastore.update_watch(uuid=uuid, update_obj={'fetch_time': round(time.time() - now, 3),
|
|
'last_checked': round(time.time())})
|
|
# Always save the screenshot if it's available
|
|
if screenshot:
|
|
self.datastore.save_screenshot(watch_uuid=uuid, screenshot=screenshot)
|
|
|
|
self.current_uuid = None # Done
|
|
self.q.task_done()
|
|
|
|
# Give the CPU time to interrupt
|
|
time.sleep(0.1)
|
|
|
|
self.app.config.exit.wait(1)
|