oops

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,6 +7,20 @@ assignees: 'dgtlmoon'
 
 ---
 
+**DO NOT USE THIS FORM TO REPORT THAT A PARTICULAR WEBSITE IS NOT SCRAPING/WATCHING AS EXPECTED**
+
+This form is only for direct bugs and feature requests todo directly with the software.
+
+Please report watched websites (full URL and _any_ settings) that do not work with changedetection.io as expected [**IN THE DISCUSSION FORUMS**](https://github.com/dgtlmoon/changedetection.io/discussions) or your report will be deleted
+
+CONSIDER TAKING OUT A SUBSCRIPTION FOR A SMALL PRICE PER MONTH, YOU GET THE BENEFIT OF USING OUR PAID PROXIES AND FURTHERING THE DEVELOPMENT OF CHANGEDETECTION.IO
+
+THANK YOU
+
+
+
+
+
 **Describe the bug**
 A clear and concise description of what the bug is.
 

README.md

@@ -1,23 +1,16 @@
-#  changedetection.io
+## Web Site Change Detection, Monitoring and Notification.
+
+Live your data-life pro-actively, track website content changes and receive notifications via Discord, Email, Slack, Telegram and 70+ more
+
+[<img src="https://raw.githubusercontent.com/dgtlmoon/changedetection.io/master/docs/screenshot.png" style="max-width:100%;" alt="Self-hosted web page change monitoring"  title="Self-hosted web page change monitoring"  />](https://lemonade.changedetection.io/start)
+
 [![Release Version][release-shield]][release-link] [![Docker Pulls][docker-pulls]][docker-link] [![License][license-shield]](LICENSE.md)
 
 ![changedetection.io](https://github.com/dgtlmoon/changedetection.io/actions/workflows/test-only.yml/badge.svg?branch=master)
 
-## Web Site Change Detection, Monitoring and Notification - Self-Hosted or SaaS.
+Know when important content changes, we support notifications via Discord, Telegram, Home-Assistant, Slack, Email and 70+ more
 
-_Know when web pages change! Stay ontop of new information! get notifications when important website content changes_ 
-
-Live your data-life *pro-actively* instead of *re-actively*.
-
-Free, Open-source web page monitoring, notification and change detection. Don't have time? [**Try our $6.99/month subscription - unlimited checks and watches!**](https://lemonade.changedetection.io/start)
-
-
-[<img src="https://raw.githubusercontent.com/dgtlmoon/changedetection.io/master/docs/screenshot.png" style="max-width:100%;" alt="Self-hosted web page change monitoring"  title="Self-hosted web page change monitoring"  />](https://lemonade.changedetection.io/start)
-
-
-**Get your own private instance now! Let us host it for you!**
-
-[**Try our $6.99/month subscription - unlimited checks and watches!**](https://lemonade.changedetection.io/start) , _half the price of other website change monitoring services and comes with unlimited watches & checks!_
+[**Don't have time? Let us host it for you! try our $6.99/month subscription - use our proxies and support!**](https://lemonade.changedetection.io/start) , _half the price of other website change monitoring services and comes with unlimited watches & checks!_
 
 
 
@@ -46,7 +39,18 @@ Free, Open-source web page monitoring, notification and change detection. Don't
 - Monitor HTML source code for unexpected changes, strengthen your PCI compliance
 - You have a very sensitive list of URLs to watch and you do _not_ want to use the paid alternatives. (Remember, _you_ are the product)
 
-_Need an actual Chrome runner with Javascript support? We support fetching via WebDriver!</a>_
+_Need an actual Chrome runner with Javascript support? We support fetching via WebDriver and Playwright!</a>_
+
+#### Key Features
+
+- Lots of trigger filters, such as "Trigger on text", "Remove text by selector", "Ignore text", "Extract text", also using regular-expressions!
+- Target elements with xPath and CSS Selectors, Easily monitor complex JSON with JsonPath rules
+- Switch between fast non-JS and Chrome JS based "fetchers"
+- Easily specify how often a site should be checked
+- Execute JS before extracting text (Good for logging in, see examples in the UI!)
+- Override Request Headers, Specify `POST` or `GET` and other methods
+- Use the "Visual Selector" to help target specific elements
+
 
 ## Screenshots
 

changedetectionio/__init__.py

@@ -18,6 +18,7 @@ import threading
 import time
 from copy import deepcopy
 from threading import Event
+from PriorityThreadPoolExecutor import PriorityThreadPoolExecutor
 
 import flask_login
 import logging
@@ -44,17 +45,17 @@ from flask_wtf import CSRFProtect
 from changedetectionio import html_tools
 from changedetectionio.api import api_v1
 
-__version__ = '0.39.17.2'
+__version__ = '0.39.18'
 
 datastore = None
 
 # Local
-running_update_threads = []
+running_update_uuids = set()
 ticker_thread = None
 
 extra_stylesheets = []
 
-update_q = queue.PriorityQueue()
+pool = None
 
 notification_q = queue.Queue()
 
@@ -105,10 +106,9 @@ def init_app_secret(datastore_path):
 # running or something similar.
 @app.template_filter('format_last_checked_time')
 def _jinja2_filter_datetime(watch_obj, format="%Y-%m-%d %H:%M:%S"):
-    # Worker thread tells us which UUID it is currently processing.
-    for t in running_update_threads:
-        if t.current_uuid == watch_obj['uuid']:
-            return '<span class="loader"></span><span> Checking now</span>'
+
+    if watch_obj['uuid'] in running_update_uuids:
+        return '<span class="loader"></span><span> Checking now</span>'
 
     if watch_obj['last_checked'] == 0:
         return 'Not yet'
@@ -178,13 +178,15 @@ class User(flask_login.UserMixin):
 
 def changedetection_app(config=None, datastore_o=None):
     global datastore
+    global pool
     datastore = datastore_o
 
     # so far just for read-only via tests, but this will be moved eventually to be the main source
     # (instead of the global var)
     app.config['DATASTORE']=datastore_o
 
-    #app.config.update(config or {})
+    pool = PriorityThreadPoolExecutor(max_workers=int(os.getenv("FETCH_WORKERS", datastore.data['settings']['requests']['workers'])))
+
 
     login_manager = flask_login.LoginManager(app)
     login_manager.login_view = 'login'
@@ -193,20 +195,17 @@ def changedetection_app(config=None, datastore_o=None):
 
     watch_api.add_resource(api_v1.WatchSingleHistory,
                            '/api/v1/watch/<string:uuid>/history/<string:timestamp>',
-                           resource_class_kwargs={'datastore': datastore, 'update_q': update_q})
+                           resource_class_kwargs={'datastore': datastore, 'queue_single_watch': queue_single_watch})
 
     watch_api.add_resource(api_v1.WatchHistory,
                            '/api/v1/watch/<string:uuid>/history',
                            resource_class_kwargs={'datastore': datastore})
 
     watch_api.add_resource(api_v1.CreateWatch, '/api/v1/watch',
-                           resource_class_kwargs={'datastore': datastore, 'update_q': update_q})
+                           resource_class_kwargs={'datastore': datastore, 'queue_single_watch': queue_single_watch})
 
     watch_api.add_resource(api_v1.Watch, '/api/v1/watch/<string:uuid>',
-                           resource_class_kwargs={'datastore': datastore, 'update_q': update_q})
-
-
-
+                           resource_class_kwargs={'datastore': datastore, 'queue_single_watch': queue_single_watch})
 
 
     # Setup cors headers to allow all domains
@@ -417,8 +416,7 @@ def changedetection_app(config=None, datastore_o=None):
                                  # Don't link to hosting when we're on the hosting environment
                                  hosted_sticky=os.getenv("SALTED_PASS", False) == False,
                                  guid=datastore.data['app_guid'],
-                                 queued_uuids=[uuid for p,uuid in update_q.queue])
-
+                                 queued_uuids=get_uuids_in_queue())
 
         if session.get('share-link'):
             del(session['share-link'])
@@ -632,7 +630,7 @@ def changedetection_app(config=None, datastore_o=None):
             datastore.needs_write_urgent = True
 
             # Queue the watch for immediate recheck, with a higher priority
-            update_q.put((1, uuid))
+            queue_single_watch(uuid=uuid, priority=1)
 
             # Diff page [edit] link should go back to diff page
             if request.args.get("next") and request.args.get("next") == 'diff':
@@ -749,7 +747,7 @@ def changedetection_app(config=None, datastore_o=None):
                 importer = import_url_list()
                 importer.run(data=request.values.get('urls'), flash=flash, datastore=datastore)
                 for uuid in importer.new_uuids:
-                    update_q.put((1, uuid))
+                    queue_single_watch(uuid=uuid, priority=1)
 
                 if len(importer.remaining_data) == 0:
                     return redirect(url_for('index'))
@@ -762,7 +760,7 @@ def changedetection_app(config=None, datastore_o=None):
                 d_importer = import_distill_io_json()
                 d_importer.run(data=request.values.get('distill-io'), flash=flash, datastore=datastore)
                 for uuid in d_importer.new_uuids:
-                    update_q.put((1, uuid))
+                    queue_single_watch(uuid=uuid, priority=1)
 
 
 
@@ -1107,7 +1105,7 @@ def changedetection_app(config=None, datastore_o=None):
 
         if not add_paused and new_uuid:
             # Straight into the queue.
-            update_q.put((1, new_uuid))
+            queue_single_watch(uuid=new_uuid, priority=1)
             flash("Watch added.")
 
         if add_paused:
@@ -1144,7 +1142,7 @@ def changedetection_app(config=None, datastore_o=None):
             uuid = list(datastore.data['watching'].keys()).pop()
 
         new_uuid = datastore.clone(uuid)
-        update_q.put((5, new_uuid))
+        queue_single_watch(uuid=uuid, priority=5)
         flash('Cloned.')
 
         return redirect(url_for('index'))
@@ -1157,35 +1155,59 @@ def changedetection_app(config=None, datastore_o=None):
         uuid = request.args.get('uuid')
         i = 0
 
-        running_uuids = []
-        for t in running_update_threads:
-            running_uuids.append(t.current_uuid)
-
-        # @todo check thread is running and skip
-
         if uuid:
-            if uuid not in running_uuids:
-                update_q.put((1, uuid))
+            if uuid not in get_uuids_in_queue():
+                queue_single_watch(uuid=uuid, priority=1)
             i = 1
 
         elif tag != None:
             # Items that have this current tag
             for watch_uuid, watch in datastore.data['watching'].items():
                 if (tag != None and tag in watch['tag']):
-                    if watch_uuid not in running_uuids and not datastore.data['watching'][watch_uuid]['paused']:
-                        update_q.put((1, watch_uuid))
+                    if watch_uuid not in get_uuids_in_queue() and not datastore.data['watching'][watch_uuid]['paused']:
+                        queue_single_watch(uuid=watch_uuid, priority=1)
                         i += 1
 
         else:
             # No tag, no uuid, add everything.
             for watch_uuid, watch in datastore.data['watching'].items():
 
-                if watch_uuid not in running_uuids and not datastore.data['watching'][watch_uuid]['paused']:
-                    update_q.put((1, watch_uuid))
+                if watch_uuid not in get_uuids_in_queue() and not datastore.data['watching'][watch_uuid]['paused']:
+                    queue_single_watch(uuid=watch_uuid, priority=1)
                     i += 1
         flash("{} watches are queued for rechecking.".format(i))
         return redirect(url_for('index', tag=tag))
 
+    @app.route("/form/checkbox-operations", methods=['POST'])
+    @login_required
+    def form_watch_list_checkbox_operations():
+        op = request.form['op']
+        uuids = request.form.getlist('uuids')
+
+        if (op == 'delete'):
+            for uuid in uuids:
+                uuid = uuid.strip()
+                if datastore.data['watching'].get(uuid):
+                    datastore.delete(uuid.strip())
+            flash("{} watches deleted".format(len(uuids)))
+
+        if (op == 'pause'):
+            for uuid in uuids:
+                uuid = uuid.strip()
+                if datastore.data['watching'].get(uuid):
+                    datastore.data['watching'][uuid.strip()]['paused'] = True
+
+            flash("{} watches paused".format(len(uuids)))
+
+        if (op == 'unpause'):
+            for uuid in uuids:
+                uuid = uuid.strip()
+                if datastore.data['watching'].get(uuid):
+                    datastore.data['watching'][uuid.strip()]['paused'] = False
+            flash("{} watches unpaused".format(len(uuids)))
+
+        return redirect(url_for('index'))
+
     @app.route("/api/share-url", methods=['GET'])
     @login_required
     def form_share_put_watch():
@@ -1316,33 +1338,31 @@ def notification_runner():
             # Trim the log length
             notification_debug_log = notification_debug_log[-100:]
 
-# Thread runner to check every minute, look for new watches to feed into the Queue.
+def queue_single_watch(uuid, priority=1):
+    pool.submit(process_single_watch, uuid, priority=int(time.time()) - priority)
+
+def process_single_watch(uuid):
+    running_update_uuids.add(uuid)
+    from changedetectionio import update_worker
+    worker = update_worker.update_worker(notification_q=notification_q, datastore=datastore)
+    worker.run(uuid)
+    running_update_uuids.remove(uuid)
+
+def get_uuids_in_queue():
+    return [workitem.args[0] for p, workitem in pool._work_queue.queue]
+
+# Thread runner to load watch jobs into the queue as they become ready/due for checking again
 def ticker_thread_check_time_launch_checks():
     import random
-    from changedetectionio import update_worker
 
     recheck_time_minimum_seconds = int(os.getenv('MINIMUM_SECONDS_RECHECK_TIME', 20))
     print("System env MINIMUM_SECONDS_RECHECK_TIME", recheck_time_minimum_seconds)
 
-    # Spin up Workers that do the fetching
-    # Can be overriden by ENV or use the default settings
-    n_workers = int(os.getenv("FETCH_WORKERS", datastore.data['settings']['requests']['workers']))
-    for _ in range(n_workers):
-        new_worker = update_worker.update_worker(update_q, notification_q, app, datastore)
-        running_update_threads.append(new_worker)
-        new_worker.start()
-
     while not app.config.exit.is_set():
 
-        # Get a list of watches by UUID that are currently fetching data
-        running_uuids = []
-        for t in running_update_threads:
-            if t.current_uuid:
-                running_uuids.append(t.current_uuid)
-
         # Re #232 - Deepcopy the data incase it changes while we're iterating through it all
         watch_uuid_list = []
-        while True:
+        while not app.config.exit.is_set():
             try:
                 watch_uuid_list = datastore.data['watching'].keys()
             except RuntimeError as e:
@@ -1352,8 +1372,9 @@ def ticker_thread_check_time_launch_checks():
                 break
 
         # Re #438 - Don't place more watches in the queue to be checked if the queue is already large
-        while update_q.qsize() >= 2000:
-            time.sleep(1)
+        while pool._work_queue.qsize() >= 2000:
+            if not app.config.exit.is_set():
+                time.sleep(1)
 
 
         recheck_time_system_seconds = int(datastore.threshold_seconds)
@@ -1384,14 +1405,20 @@ def ticker_thread_check_time_launch_checks():
 
             seconds_since_last_recheck = now - watch['last_checked']
             if seconds_since_last_recheck >= (threshold + watch.jitter_seconds) and seconds_since_last_recheck >= recheck_time_minimum_seconds:
-                if not uuid in running_uuids and uuid not in [q_uuid for p,q_uuid in update_q.queue]:
-                    print("> Queued watch UUID {} last checked at {} queued at {:0.2f} jitter {:0.2f}s, {:0.2f}s since last checked".format(uuid,
-                                                                                                         watch['last_checked'],
-                                                                                                         now,
-                                                                                                         watch.jitter_seconds,
-                                                                                                         now - watch['last_checked']))
-                    # Into the queue with you
-                    update_q.put((5, uuid))
+                #@todo check 'not in running_uuids'
+                if not uuid and uuid not in get_uuids_in_queue():
+                    # Use Epoch time as priority, so we get a "sorted" PriorityQueue, but we can still push a priority 1 into it.
+                    priority = int(time.time())
+                    print(
+                        "> Queued watch UUID {} last checked at {} queued at {:0.2f} priority {} jitter {:0.2f}s, {:0.2f}s since last checked".format(
+                            uuid,
+                            watch['last_checked'],
+                            now,
+                            priority,
+                            watch.jitter_seconds,
+                            now - watch['last_checked']))
+
+                    queue_single_watch(uuid=uuid, priority=priority)
 
                     # Reset for next time
                     watch.jitter_seconds = 0

changedetectionio/api/api_v1.py

@@ -1,6 +1,8 @@
 from flask_restful import abort, Resource
 from flask import request, make_response
+
 import validators
+
 from . import auth
 
 
@@ -11,7 +13,7 @@ class Watch(Resource):
     def __init__(self, **kwargs):
         # datastore is a black box dependency
         self.datastore = kwargs['datastore']
-        self.update_q = kwargs['update_q']
+        self.queue_single_watch = kwargs['queue_single_watch']
 
     # Get information about a single watch, excluding the history list (can be large)
     # curl http://localhost:4000/api/v1/watch/<string:uuid>
@@ -24,7 +26,7 @@ class Watch(Resource):
             abort(404, message='No watch exists with the UUID of {}'.format(uuid))
 
         if request.args.get('recheck'):
-            self.update_q.put((1, uuid))
+            self.queue_single_watch(uuid, priority=1)
             return "OK", 200
 
         # Return without history, get that via another API call
@@ -86,7 +88,7 @@ class CreateWatch(Resource):
     def __init__(self, **kwargs):
         # datastore is a black box dependency
         self.datastore = kwargs['datastore']
-        self.update_q = kwargs['update_q']
+        self.queue_single_watch = kwargs['queue_single_watch']
 
     @auth.check_token
     def post(self):
@@ -100,7 +102,7 @@ class CreateWatch(Resource):
         extras = {'title': json_data['title'].strip()} if json_data.get('title') else {}
 
         new_uuid = self.datastore.add_watch(url=json_data['url'].strip(), tag=tag, extras=extras)
-        self.update_q.put((1, new_uuid))
+        self.queue_single_watch(new_uuid, priority=1)
         return {'uuid': new_uuid}, 201
 
     # Return concise list of available watches and some very basic info
@@ -118,7 +120,7 @@ class CreateWatch(Resource):
 
         if request.args.get('recheck_all'):
             for uuid in self.datastore.data['watching'].keys():
-                self.update_q.put((1, uuid))
+                self.queue_single_watch(uuid, priority=1)
             return {'status': "OK"}, 200
 
         return list, 200

changedetectionio/content_fetcher.py

@@ -31,11 +31,12 @@ class JSActionExceptions(Exception):
         return
 
 class PageUnloadable(Exception):
-    def __init__(self, status_code, url, screenshot=False):
+    def __init__(self, status_code, url, screenshot=False, message=False):
         # Set this so we can use it in other parts of the app
         self.status_code = status_code
         self.url = url
         self.screenshot = screenshot
+        self.message = message
         return
 
 class EmptyReply(Exception):
@@ -292,7 +293,15 @@ class base_html_playwright(Fetcher):
 
         # allow per-watch proxy selection override
         if proxy_override:
-            self.proxy = {'server': proxy_override}
+            # https://playwright.dev/docs/network#http-proxy
+            from urllib.parse import urlparse
+            parsed = urlparse(proxy_override)
+            proxy_url = "{}://{}:{}".format(parsed.scheme, parsed.hostname, parsed.port)
+            self.proxy = {'server': proxy_url}
+            if parsed.username:
+                self.proxy['username'] = parsed.username
+            if parsed.password:
+                self.proxy['password'] = parsed.password
 
     def run(self,
             url,
@@ -356,7 +365,7 @@ class base_html_playwright(Fetcher):
                 print(str(e))
                 context.close()
                 browser.close()
-                raise PageUnloadable(url=url, status_code=None)
+                raise PageUnloadable(url=url, status_code=None, message=e.message)
 
             if response is None:
                 context.close()

changedetectionio/fetch_site_status.py

@@ -13,6 +13,8 @@ urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)
 # Some common stuff here that can be moved to a base class
 # (set_proxy_from_list)
 class perform_site_check():
+    screenshot = None
+    xpath_data = None
 
     def __init__(self, *args, datastore, **kwargs):
         super().__init__(*args, **kwargs)
@@ -127,6 +129,9 @@ class perform_site_check():
         fetcher.run(url, timeout, request_headers, request_body, request_method, ignore_status_codes, watch['css_filter'])
         fetcher.quit()
 
+        self.screenshot = fetcher.screenshot
+        self.xpath_data = fetcher.xpath_data
+
         # Fetching complete, now filters
         # @todo move to class / maybe inside of fetcher abstract base?
 
@@ -312,4 +317,4 @@ class perform_site_check():
         if not watch.get('previous_md5'):
             watch['previous_md5'] = fetched_md5
 
-        return changed_detected, update_obj, text_content_before_ignored_filter, fetcher.screenshot, fetcher.xpath_data
+        return changed_detected, update_obj, text_content_before_ignored_filter

changedetectionio/forms.py

@@ -384,7 +384,6 @@ class globalSettingsApplicationForm(commonSettingsForm):
     global_subtractive_selectors = StringListField('Remove elements', [ValidateCSSJSONXPATHInput(allow_xpath=False, allow_json=False)])
     global_ignore_text = StringListField('Ignore Text', [ValidateListRegex()])
     ignore_whitespace = BooleanField('Ignore whitespace')
-    real_browser_save_screenshot = BooleanField('Save last screenshot when using Chrome?')
     removepassword_button = SubmitField('Remove password', render_kw={"class": "pure-button pure-button-primary"})
     empty_pages_are_a_change =  BooleanField('Treat empty pages as a change?', default=False)
     render_anchor_tag_content = BooleanField('Render anchor tag content', default=False)

changedetectionio/model/App.py

@@ -42,7 +42,6 @@ class model(dict):
                     'notification_title': default_notification_title,
                     'notification_body': default_notification_body,
                     'notification_format': default_notification_format,
-                    'real_browser_save_screenshot': True,
                     'schema_version' : 0,
                     'webdriver_delay': None  # Extra delay in seconds before extracting text
                 }

changedetectionio/model/Watch.py

@@ -83,6 +83,12 @@ class model(dict):
 
         return False
 
+    def ensure_data_dir_exists(self):
+        target_path = os.path.join(self.__datastore_path, self['uuid'])
+        if not os.path.isdir(target_path):
+            print ("> Creating data dir {}".format(target_path))
+            os.mkdir(target_path)
+
     @property
     def label(self):
         # Used for sorting
@@ -149,9 +155,7 @@ class model(dict):
 
         output_path = "{}/{}".format(self.__datastore_path, self['uuid'])
 
-        # Incase the operator deleted it, check and create.
-        if not os.path.isdir(output_path):
-            os.mkdir(output_path)
+        self.ensure_data_dir_exists()
 
         snapshot_fname = "{}/{}.stripped.txt".format(output_path, uuid.uuid4())
         logging.debug("Saving history text {}".format(snapshot_fname))

changedetectionio/run_all_tests.sh

@@ -38,13 +38,14 @@ docker kill $$-test_selenium
 
 echo "TESTING WEBDRIVER FETCH > PLAYWRIGHT/BROWSERLESS..."
 # Not all platforms support playwright (not ARM/rPI), so it's not packaged in requirements.txt
-pip3 install playwright~=1.22
+pip3 install playwright~=1.24
 docker run -d --name $$-test_browserless -e "DEFAULT_LAUNCH_ARGS=[\"--window-size=1920,1080\"]" --rm  -p 3000:3000  --shm-size="2g"  browserless/chrome:1.53-chrome-stable
 # takes a while to spin up
 sleep 5
 export PLAYWRIGHT_DRIVER_URL=ws://127.0.0.1:3000
 pytest tests/fetchers/test_content.py
 pytest tests/test_errorhandling.py
+pytest tests/visualselector/test_fetch_data.py
 
 unset PLAYWRIGHT_DRIVER_URL
 docker kill $$-test_browserless

changedetectionio/static/js/watch-overview.js

@@ -22,5 +22,18 @@ $(function () {
       });
   });
 
+    // checkboxes - check all
+    $("#check-all").click(function (e) {
+        $('input[type=checkbox]').not(this).prop('checked', this.checked);
+    });
+    // checkboxes - show/hide buttons
+    $("input[type=checkbox]").click(function (e) {
+        if ($('input[type=checkbox]:checked').length) {
+            $('#checkbox-operations').slideDown();
+        } else {
+            $('#checkbox-operations').slideUp();
+        }
+    });
+
 });
 

changedetectionio/static/styles/styles.css

@@ -555,3 +555,13 @@ ul {
   .snapshot-age.error {
     background-color: #ff0000;
     color: #fff; }
+
+#checkbox-operations {
+  background: rgba(0, 0, 0, 0.05);
+  padding: 1em;
+  border-radius: 10px;
+  margin-bottom: 1em;
+  display: none; }
+
+.checkbox-uuid > * {
+  vertical-align: middle; }

changedetectionio/static/styles/styles.scss

@@ -774,3 +774,15 @@ ul {
   }
 }
 
+#checkbox-operations {
+  background: rgba(0, 0, 0, 0.05);
+  padding: 1em;
+  border-radius: 10px;
+  margin-bottom: 1em;
+  display: none;
+}
+.checkbox-uuid {
+  > * {
+    vertical-align: middle;
+  }
+}

changedetectionio/store.py

@@ -8,7 +8,7 @@ import threading
 import time
 import uuid as uuid_builder
 from copy import deepcopy
-from os import mkdir, path, unlink
+from os import path, unlink
 from threading import Lock
 import re
 import requests
@@ -324,12 +324,7 @@ class ChangeDetectionStore:
             new_watch.update(apply_extras)
             self.__data['watching'][new_uuid]=new_watch
 
-        # Get the directory ready
-        output_path = "{}/{}".format(self.datastore_path, new_uuid)
-        try:
-            mkdir(output_path)
-        except FileExistsError:
-            print(output_path, "already exists.")
+        self.__data['watching'][new_uuid].ensure_data_dir_exists()
 
         if write_to_disk_now:
             self.sync_to_json()
@@ -346,29 +341,35 @@ class ChangeDetectionStore:
 
     # Save as PNG, PNG is larger but better for doing visual diff in the future
     def save_screenshot(self, watch_uuid, screenshot: bytes, as_error=False):
+        if not self.data['watching'].get(watch_uuid):
+            return
 
         if as_error:
             target_path = os.path.join(self.datastore_path, watch_uuid, "last-error-screenshot.png")
         else:
             target_path = os.path.join(self.datastore_path, watch_uuid, "last-screenshot.png")
 
+        self.data['watching'][watch_uuid].ensure_data_dir_exists()
+
         with open(target_path, 'wb') as f:
             f.write(screenshot)
             f.close()
 
     def save_error_text(self, watch_uuid, contents):
-
+        if not self.data['watching'].get(watch_uuid):
+            return
         target_path = os.path.join(self.datastore_path, watch_uuid, "last-error.txt")
 
         with open(target_path, 'w') as f:
             f.write(contents)
 
     def save_xpath_data(self, watch_uuid, data, as_error=False):
-
+        if not self.data['watching'].get(watch_uuid):
+            return
         if as_error:
-            target_path = os.path.join(self.datastore_path, watch_uuid, "elements.json")
-        else:
             target_path = os.path.join(self.datastore_path, watch_uuid, "elements-error.json")
+        else:
+            target_path = os.path.join(self.datastore_path, watch_uuid, "elements.json")
 
         with open(target_path, 'w') as f:
             f.write(json.dumps(data))

changedetectionio/templates/preview.html

@@ -57,6 +57,7 @@
          </br>
          {% if is_html_webdriver %}
            {% if screenshot %}
+             <div class="snapshot-age">{{watch.snapshot_screenshot_ctime|format_timestamp_timeago}}</div>
              <img style="max-width: 80%" id="screenshot-img" alt="Current screenshot from most recent request"/>
            {% else %}
               No screenshot available just yet! Try rechecking the page.

changedetectionio/templates/settings.html

@@ -69,12 +69,6 @@
                         {{ render_checkbox_field(form.application.form.extract_title_as_title) }}
                         <span class="pure-form-message-inline">Note: This will automatically apply to all existing watches.</span>
                     </div>
-
-                    <div class="pure-control-group">
-                        {{ render_checkbox_field(form.application.form.real_browser_save_screenshot) }}
-                        <span class="pure-form-message-inline">When using a Chrome browser, a screenshot from the last check will be available on the Diff page</span>
-                    </div>
-
                     <div class="pure-control-group">
                         {{ render_checkbox_field(form.application.form.empty_pages_are_a_change) }}
                         <span class="pure-form-message-inline">When a page contains HTML, but no renderable text appears (empty page), is this considered a change?</span>

changedetectionio/templates/watch-overview.html

@@ -24,6 +24,14 @@
         </fieldset>
         <span style="color:#eee; font-size: 80%;"><img style="height: 1em;display:inline-block;" src="{{url_for('static_content', group='images', filename='spread-white.svg')}}" /> Tip: You can also add 'shared' watches. <a href="https://github.com/dgtlmoon/changedetection.io/wiki/Sharing-a-Watch">More info</a></a></span>
     </form>
+
+    <form class="pure-form" action="{{ url_for('form_watch_list_checkbox_operations') }}" method="POST" id="watch-list-form">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
+    <div id="checkbox-operations">
+        <button class="pure-button button-secondary button-xsmall" style="font-size: 70%"  name="op" value="pause">Pause</button>
+        <button class="pure-button button-secondary button-xsmall" style="font-size: 70%"  name="op" value="unpause">UnPause</button>
+        <button class="pure-button button-secondary button-xsmall" style="background: #dd4242; font-size: 70%" name="op" value="delete">Delete</button>
+    </div>
     <div>
         <a href="{{url_for('index')}}" class="pure-button button-tag {{'active' if not active_tag }}">All</a>
         {% for tag in tags %}
@@ -41,7 +49,7 @@
         <table class="pure-table pure-table-striped watch-table">
             <thead>
             <tr>
-                <th>#</th>
+                <th><input style="vertical-align: middle" type="checkbox" id="check-all"/> #</th>
                 <th></th>
                 {% set link_order = "desc" if sort_order else "asc" %}
                 {% set arrow_span = "" %}
@@ -66,7 +74,7 @@
                 {% if watch.paused is defined and watch.paused != False %}paused{% endif %}
                 {% if watch.newest_history_key| int > watch.last_viewed and watch.history_n>=2 %}unviewed{% endif %}
                 {% if watch.uuid in queued_uuids %}queued{% endif %}">
-                <td class="inline">{{ loop.index }}</td>
+                <td class="inline checkbox-uuid" ><input name="uuids"  type="checkbox" value="{{ watch.uuid}} "/> <span>{{ loop.index }}</span></td>
                 <td class="inline watch-controls">
                     <a class="state-{{'on' if watch.paused }}" href="{{url_for('index', op='pause', uuid=watch.uuid, tag=active_tag)}}"><img src="{{url_for('static_content', group='images', filename='pause.svg')}}" alt="Pause checks" title="Pause checks"/></a>
                     <a class="state-{{'on' if watch.notification_muted}}" href="{{url_for('index', op='mute', uuid=watch.uuid, tag=active_tag)}}"><img src="{{url_for('static_content', group='images', filename='bell-off.svg')}}" alt="Mute notifications" title="Mute notifications"/></a>
@@ -129,5 +137,6 @@
          #}
 
     </div>
+    </form>
 </div>
 {% endblock %}

changedetectionio/tests/fetchers/test_content.py

@@ -2,7 +2,7 @@
 
 import time
 from flask import url_for
-from ..util import live_server_setup
+from ..util import live_server_setup, wait_for_all_checks
 import logging
 
 
@@ -29,14 +29,8 @@ def test_fetch_webdriver_content(client, live_server):
 
     assert b"1 Imported" in res.data
     time.sleep(3)
-    attempt = 0
-    while attempt < 20:
-        res = client.get(url_for("index"))
-        if not b'Checking now' in res.data:
-            break
-        logging.getLogger().info("Waiting for check to not say 'Checking now'..")
-        time.sleep(3)
-        attempt += 1
+
+    wait_for_all_checks(client)
 
 
     res = client.get(

changedetectionio/tests/util.py

@@ -2,6 +2,8 @@
 
 from flask import make_response, request
 from flask import url_for
+import logging
+import time
 
 def set_original_response():
     test_return_data = """<html>
@@ -68,6 +70,31 @@ def extract_api_key_from_UI(client):
     api_key = m.group(1)
     return api_key.strip()
 
+
+# kinda funky, but works for now
+def extract_UUID_from_client(client):
+    import re
+    res = client.get(
+        url_for("index"),
+    )
+    # <span id="api-key">{{api_key}}</span>
+
+    m = re.search('edit/(.+?)"', str(res.data))
+    uuid = m.group(1)
+    return uuid.strip()
+
+def wait_for_all_checks(client):
+    # Loop waiting until done..
+    attempt=0
+    while attempt < 60:
+        time.sleep(1)
+        res = client.get(url_for("index"))
+        if not b'Checking now' in res.data:
+            break
+        logging.getLogger().info("Waiting for watch-list to not say 'Checking now'.. {}".format(attempt))
+
+        attempt += 1
+
 def live_server_setup(live_server):
 
     @live_server.app.route('/test-endpoint')
@@ -133,3 +160,4 @@ def live_server_setup(live_server):
         return ret
 
     live_server.start()
+

changedetectionio/tests/visualselector/__init__.py

@@ -0,0 +1,2 @@
+"""Tests for the app."""
+

changedetectionio/tests/visualselector/conftest.py

@@ -0,0 +1,3 @@
+#!/usr/bin/python3
+
+from .. import conftest

changedetectionio/tests/visualselector/test_fetch_data.py

@@ -0,0 +1,35 @@
+#!/usr/bin/python3
+
+import time
+from flask import url_for
+from ..util import live_server_setup, wait_for_all_checks, extract_UUID_from_client
+
+# Add a site in paused mode, add an invalid filter, we should still have visual selector data ready
+def test_visual_selector_content_ready(client, live_server):
+    import os
+
+    assert os.getenv('PLAYWRIGHT_DRIVER_URL'), "Needs PLAYWRIGHT_DRIVER_URL set for this test"
+    live_server_setup(live_server)
+    time.sleep(1)
+
+    # Add our URL to the import page, maybe better to use something we control?
+    # We use an external URL because the docker container is too difficult to setup to connect back to the pytest socket
+    test_url = 'https://news.ycombinator.com'
+    res = client.post(
+        url_for("form_quick_watch_add"),
+        data={"url": test_url, "tag": '', 'edit_and_watch_submit_button': 'Edit > Watch'},
+        follow_redirects=True
+    )
+    assert b"Watch added in Paused state, saving will unpause" in res.data
+
+    res = client.post(
+        url_for("edit_page", uuid="first", unpause_on_save=1),
+        data={"css_filter": ".does-not-exist", "url": test_url, "tag": "", "headers": "", 'fetch_backend': "html_webdriver"},
+        follow_redirects=True
+    )
+    assert b"unpaused" in res.data
+    time.sleep(1)
+    wait_for_all_checks(client)
+    uuid = extract_UUID_from_client(client)
+    assert os.path.isfile(os.path.join('test-datastore', uuid, 'last-screenshot.png')), "last-screenshot.png should exist"
+    assert os.path.isfile(os.path.join('test-datastore', uuid, 'elements.json')), "xpath elements.json data should exist"

changedetectionio/update_worker.py

@@ -1,8 +1,7 @@
+import logging
 import os
-import threading
-import queue
 import time
-
+logging.basicConfig(level=logging.DEBUG)
 from changedetectionio import content_fetcher
 from changedetectionio.html_tools import FilterNotFoundInResponse
 
@@ -12,15 +11,12 @@ from changedetectionio.html_tools import FilterNotFoundInResponse
 # (another process inserts watches into the queue that are time-ready for checking)
 
 
-class update_worker(threading.Thread):
+class update_worker():
     current_uuid = None
 
-    def __init__(self, q, notification_q, app, datastore, *args, **kwargs):
-        self.q = q
-        self.app = app
+    def __init__(self,  notification_q, datastore):
         self.notification_q = notification_q
         self.datastore = datastore
-        super().__init__(*args, **kwargs)
 
     def send_content_changed_notification(self, t, watch_uuid):
 
@@ -116,180 +112,168 @@ class update_worker(threading.Thread):
             if os.path.isfile(full_path):
                 os.unlink(full_path)
 
-    def run(self):
+    def run(self, uuid):
         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():
+        self.current_uuid = uuid
+
+        if uuid in list(self.datastore.data['watching'].keys()):
+            changed_detected = False
+            contents = b''
+            screenshot = False
+            update_obj= {}
+            xpath_data = False
+            process_changedetection_results = True
+            print("> Processing UUID {} Priority {} URL {}".format(uuid, 1, self.datastore.data['watching'][uuid]['url']))
+            now = time.time()
 
             try:
-                priority, uuid = self.q.get(block=False)
-            except queue.Empty:
-                pass
+                changed_detected, update_obj, contents = 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:
+                logging.error("File permission error updating", uuid, str(e))
+                process_changedetection_results = False
+            except content_fetcher.ReplyWithContentButNoText as e:
+                # Totally fine, it's by choice - just continue on, nothing more to care about
+                # Page had elements/content but no renderable text
+                # Backend (not filters) gave zero output
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': "Got HTML content but no text found (With {} reply code).".format(e.status_code)})
+                if e.screenshot:
+                    self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot)
+                process_changedetection_results = False
 
+            except content_fetcher.Non200ErrorCodeReceived as e:
+                if e.status_code == 403:
+                    err_text = "Error - 403 (Access denied) received"
+                elif e.status_code == 404:
+                    err_text = "Error - 404 (Page not found) received"
+                elif e.status_code == 500:
+                    err_text = "Error - 500 (Internal server Error) received"
+                else:
+                    err_text = "Error - Request returned a HTTP error code {}".format(str(e.status_code))
+
+                if e.screenshot:
+                    self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
+                if e.xpath_data:
+                    self.datastore.save_xpath_data(watch_uuid=uuid, data=e.xpath_data, as_error=True)
+                if e.page_text:
+                    self.datastore.save_error_text(watch_uuid=uuid, contents=e.page_text)
+
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
+                                                                   # So that we get a trigger when the content is added again
+                                                                   'previous_md5': ''})
+                process_changedetection_results = False
+
+            except FilterNotFoundInResponse as e:
+                err_text = "Warning, filter '{}' not found".format(str(e))
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
+                                                                   # So that we get a trigger when the content is added again
+                                                                   'previous_md5': ''})
+
+                # Only when enabled, send the notification
+                if self.datastore.data['watching'][uuid].get('filter_failure_notification_send', False):
+                    c = self.datastore.data['watching'][uuid].get('consecutive_filter_failures', 5)
+                    c += 1
+                    # Send notification if we reached the threshold?
+                    threshold = self.datastore.data['settings']['application'].get('filter_failure_notification_threshold_attempts',
+                                                                                   0)
+                    print("Filter for {} not found, consecutive_filter_failures: {}".format(uuid, c))
+                    if threshold > 0 and c >= threshold:
+                        if not self.datastore.data['watching'][uuid].get('notification_muted'):
+                            self.send_filter_failure_notification(uuid)
+                        c = 0
+
+                    self.datastore.update_watch(uuid=uuid, update_obj={'consecutive_filter_failures': c})
+
+                process_changedetection_results = True
+
+            except content_fetcher.EmptyReply as e:
+                # Some kind of custom to-str handler in the exception handler that does this?
+                err_text = "EmptyReply - try increasing 'Wait seconds before extracting text', 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 content_fetcher.ScreenshotUnavailable as e:
+                err_text = "Screenshot unavailable, page did not render fully in the expected time - try increasing 'Wait seconds before extracting text'"
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
+                                                                   'last_check_status': e.status_code})
+                process_changedetection_results = False
+            except content_fetcher.JSActionExceptions as e:
+                err_text = "Error running JS Actions - Page request - "+e.message
+                if e.screenshot:
+                    self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
+                                                                   'last_check_status': e.status_code})
+            except content_fetcher.PageUnloadable as e:
+                err_text = "Page request from server didnt respond correctly"
+                if e.message:
+                    err_text = "{} - {}".format(err_text, e.message)
+
+                if e.screenshot:
+                    self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
+
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
+                                                                   'last_check_status': e.status_code})
+            except Exception as e:
+                logging.error("Exception reached processing watch UUID: %s - %s", uuid, str(e))
+                self.datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
+                # Other serious error
+                process_changedetection_results = False
             else:
-                self.current_uuid = uuid
+                # Crash protection, the watch entry could have been removed by this point (during a slow chrome fetch etc)
+                if not self.datastore.data['watching'].get(uuid):
+                    return
 
-                if uuid in list(self.datastore.data['watching'].keys()):
-                    changed_detected = False
-                    contents = b''
-                    screenshot = False
-                    update_obj= {}
-                    xpath_data = False
-                    process_changedetection_results = True
-                    print("> Processing UUID {} Priority {} URL {}".format(uuid, priority, self.datastore.data['watching'][uuid]['url']))
-                    now = time.time()
+                # Mark that we never had any failures
+                if not self.datastore.data['watching'][uuid].get('ignore_status_codes'):
+                    update_obj['consecutive_filter_failures'] = 0
 
-                    try:
-                        changed_detected, update_obj, contents, screenshot, xpath_data = 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))
-                        process_changedetection_results = False
-                    except content_fetcher.ReplyWithContentButNoText as e:
-                        # Totally fine, it's by choice - just continue on, nothing more to care about
-                        # Page had elements/content but no renderable text
-                        # Backend (not filters) gave zero output
-                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': "Got HTML content but no text found (With {} reply code).".format(e.status_code)})
-                        if e.screenshot:
-                            self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot)
-                        process_changedetection_results = False
+                self.cleanup_error_artifacts(uuid)
 
-                    except content_fetcher.Non200ErrorCodeReceived as e:
-                        if e.status_code == 403:
-                            err_text = "Error - 403 (Access denied) received"
-                        elif e.status_code == 404:
-                            err_text = "Error - 404 (Page not found) received"
-                        elif e.status_code == 500:
-                            err_text = "Error - 500 (Internal server Error) received"
-                        else:
-                            err_text = "Error - Request returned a HTTP error code {}".format(str(e.status_code))
+            # Different exceptions mean that we may or may not want to bump the snapshot, trigger notifications etc
+            if process_changedetection_results:
+                try:
+                    watch = self.datastore.data['watching'][uuid]
+                    fname = "" # Saved history text filename
 
-                        if e.screenshot:
-                            self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
-                        if e.xpath_data:
-                            self.datastore.save_xpath_data(watch_uuid=uuid, data=e.xpath_data, as_error=True)
-                        if e.page_text:
-                            self.datastore.save_error_text(watch_uuid=uuid, contents=e.page_text)
+                    # 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
+                        watch.save_history_text(contents=contents, timestamp=str(round(time.time())))
 
-                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
-                                                                           # So that we get a trigger when the content is added again
-                                                                           'previous_md5': ''})
-                        process_changedetection_results = False
+                    self.datastore.update_watch(uuid=uuid, update_obj=update_obj)
 
-                    except FilterNotFoundInResponse as e:
-                        err_text = "Warning, filter '{}' not found".format(str(e))
-                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
-                                                                           # So that we get a trigger when the content is added again
-                                                                           'previous_md5': ''})
+                    # A change was detected
+                    if changed_detected:
+                        print (">> Change detected in UUID {} - {}".format(uuid, watch['url']))
 
-                        # Only when enabled, send the notification
-                        if self.datastore.data['watching'][uuid].get('filter_failure_notification_send', False):
-                            c = self.datastore.data['watching'][uuid].get('consecutive_filter_failures', 5)
-                            c += 1
-                            # Send notification if we reached the threshold?
-                            threshold = self.datastore.data['settings']['application'].get('filter_failure_notification_threshold_attempts',
-                                                                                           0)
-                            print("Filter for {} not found, consecutive_filter_failures: {}".format(uuid, c))
-                            if threshold > 0 and c >= threshold:
-                                if not self.datastore.data['watching'][uuid].get('notification_muted'):
-                                    self.send_filter_failure_notification(uuid)
-                                c = 0
-
-                            self.datastore.update_watch(uuid=uuid, update_obj={'consecutive_filter_failures': c})
-
-                        process_changedetection_results = True
-
-                    except content_fetcher.EmptyReply as e:
-                        # Some kind of custom to-str handler in the exception handler that does this?
-                        err_text = "EmptyReply - try increasing 'Wait seconds before extracting text', 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 content_fetcher.ScreenshotUnavailable as e:
-                        err_text = "Screenshot unavailable, page did not render fully in the expected time - try increasing 'Wait seconds before extracting text'"
-                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
-                                                                           'last_check_status': e.status_code})
-                        process_changedetection_results = False
-                    except content_fetcher.JSActionExceptions as e:
-                        err_text = "Error running JS Actions - Page request - "+e.message
-                        if e.screenshot:
-                            self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
-                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
-                                                                           'last_check_status': e.status_code})
-                    except content_fetcher.PageUnloadable as e:
-                        err_text = "Page request from server didnt respond correctly"
-                        if e.screenshot:
-                            self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
-
-                        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)})
-                        # Other serious error
-                        process_changedetection_results = False
-                    else:
-
-                        # Mark that we never had any failures
-                        if not self.datastore.data['watching'][uuid].get('ignore_status_codes'):
-                            update_obj['consecutive_filter_failures'] = 0
-
-                        self.cleanup_error_artifacts(uuid)
-
-                    # Crash protection, the watch entry could have been removed by this point (during a slow chrome fetch etc)
-                    if not self.datastore.data['watching'].get(uuid):
-                        continue
-
-                    # Different exceptions mean that we may or may not want to bump the snapshot, trigger notifications etc
-                    if process_changedetection_results:
-                        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
-                                watch.save_history_text(contents=contents, timestamp=str(round(time.time())))
-
-                            self.datastore.update_watch(uuid=uuid, update_obj=update_obj)
-
-                            # A change was detected
-                            if changed_detected:
-                                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 watch.history_n >= 2:
-                                    if not self.datastore.data['watching'][uuid].get('notification_muted'):
-                                        self.send_content_changed_notification(self, watch_uuid=uuid)
+                        # Notifications should only trigger on the second time (first time, we gather the initial snapshot)
+                        if watch.history_n >= 2:
+                            if not self.datastore.data['watching'][uuid].get('notification_muted'):
+                                self.send_content_changed_notification(self, watch_uuid=uuid)
 
 
-                        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)})
+                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)
+                    logging.error("Exception reached processing watch UUID: %s - %s", uuid, str(e))
+                    self.datastore.update_watch(uuid=uuid, update_obj={'last_error': str(e)})
 
 
-                    # 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 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)
-                    if xpath_data:
-                        self.datastore.save_xpath_data(watch_uuid=uuid, data=xpath_data)
+            # Always save the screenshot if it's available
+            if update_handler.screenshot:
+                self.datastore.save_screenshot(watch_uuid=uuid, screenshot=update_handler.screenshot)
+            if update_handler.xpath_data:
+                self.datastore.save_xpath_data(watch_uuid=uuid, data=update_handler.xpath_data)
 
 
-                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)
+        self.current_uuid = None

requirements.txt

@@ -33,6 +33,8 @@ bs4
 # XPath filtering, lxml is required by bs4 anyway, but put it here to be safe.
 lxml
 
+PriorityThreadPoolExecutor
+
 # 3.141 was missing socksVersion, 3.150 was not in pypi, so we try 4.1.0
 selenium ~= 4.1.0