Be sure visual-selector data is set when filter is not found

Dockerfile

@@ -22,7 +22,7 @@ RUN pip install --target=/dependencies -r /requirements.txt
 
 # Playwright is an alternative to Selenium
 # Excluded this package from requirements.txt to prevent arm/v6 and arm/v7 builds from failing
-RUN pip install --target=/dependencies playwright~=1.20 \
+RUN pip install --target=/dependencies playwright~=1.24 \
     || echo "WARN: Failed to install Playwright. The application can still run, but the Playwright option will be disabled."
 
 # Final image stage

README.md

@@ -11,8 +11,6 @@ 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)
 
-[[ Discord ]](https://discord.com/channels/1000806276256780309/1000806276873334816) [[ YouTube ]](https://www.youtube.com/channel/UCbS09q1TRf0o4N2t-WA3emQ) [[ LinkedIn ]](https://www.linkedin.com/company/changedetection-io/)
-
 
 [<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)
 
@@ -31,6 +29,7 @@ Free, Open-source web page monitoring, notification and change detection. Don't
 #### Example use cases
 
 - Products and services have a change in pricing
+- _Out of stock notification_ and _Back In stock notification_
 - Governmental department updates (changes are often only on their websites)
 - New software releases, security advisories when you're not on their mailing list.
 - Festivals with changes

changedetection.py

@@ -6,6 +6,36 @@
 # Read more https://github.com/dgtlmoon/changedetection.io/wiki
 
 from changedetectionio import changedetection
+import multiprocessing
+import signal
+import os
+
+def sigchld_handler(_signo, _stack_frame):
+    import sys
+    print('Shutdown: Got SIGCHLD')
+    # https://stackoverflow.com/questions/40453496/python-multiprocessing-capturing-signals-to-restart-child-processes-or-shut-do
+    pid, status = os.waitpid(-1, os.WNOHANG | os.WUNTRACED | os.WCONTINUED)
+
+    print('Sub-process: pid %d status %d' % (pid, status))
+    if status != 0:
+        sys.exit(1)
+
+    raise SystemExit
 
 if __name__ == '__main__':
-    changedetection.main()
+
+    #signal.signal(signal.SIGCHLD, sigchld_handler)
+
+    # The only way I could find to get Flask to shutdown, is to wrap it and then rely on the subsystem issuing SIGTERM/SIGKILL
+    parse_process = multiprocessing.Process(target=changedetection.main)
+    parse_process.daemon = True
+    parse_process.start()
+    import time
+
+    try:
+        while True:
+            time.sleep(1)
+
+    except KeyboardInterrupt:
+        #parse_process.terminate() not needed, because this process will issue it to the sub-process anyway
+        print ("Exited - CTRL+C")

changedetectionio/.gitignore

@@ -1 +1,2 @@
 test-datastore
+package-lock.json

changedetectionio/__init__.py

@@ -44,7 +44,7 @@ from flask_wtf import CSRFProtect
 from changedetectionio import html_tools
 from changedetectionio.api import api_v1
 
-__version__ = '0.39.16'
+__version__ = '0.39.17.2'
 
 datastore = None
 
@@ -54,7 +54,7 @@ ticker_thread = None
 
 extra_stylesheets = []
 
-update_q = queue.Queue()
+update_q = queue.PriorityQueue()
 
 notification_q = queue.Queue()
 
@@ -76,7 +76,7 @@ app.config['LOGIN_DISABLED'] = False
 
 # Disables caching of the templates
 app.config['TEMPLATES_AUTO_RELOAD'] = True
-
+app.jinja_env.add_extension('jinja2.ext.loopcontrols')
 csrf = CSRFProtect()
 csrf.init_app(app)
 
@@ -105,10 +105,9 @@ 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 threading.enumerate():
+    for t in running_update_threads:
-        if t.name == 'update_worker' and t.current_uuid == watch_obj['uuid']:
+        if t.current_uuid == watch_obj['uuid']:
             return '<span class="loader"></span><span> Checking now</span>'
 
     if watch_obj['last_checked'] == 0:
@@ -116,18 +115,19 @@ def _jinja2_filter_datetime(watch_obj, format="%Y-%m-%d %H:%M:%S"):
 
     return timeago.format(int(watch_obj['last_checked']), time.time())
 
-
-# @app.context_processor
-# def timeago():
-#    def _timeago(lower_time, now):
-#        return timeago.format(lower_time, now)
-#    return dict(timeago=_timeago)
-
 @app.template_filter('format_timestamp_timeago')
 def _jinja2_filter_datetimestamp(timestamp, format="%Y-%m-%d %H:%M:%S"):
+    if timestamp == False:
+        return 'Not yet'
+
     return timeago.format(timestamp, time.time())
-    # return timeago.format(timestamp, time.time())
+
-    # return datetime.datetime.utcfromtimestamp(timestamp).strftime(format)
+@app.template_filter('format_seconds_ago')
+def _jinja2_filter_seconds_precise(timestamp):
+    if timestamp == False:
+        return 'Not yet'
+
+    return format(int(time.time()-timestamp), ',d')
 
 # When nobody is logged in Flask-Login's current_user is set to an AnonymousUser object.
 class User(flask_login.UserMixin):
@@ -314,7 +314,7 @@ def changedetection_app(config=None, datastore_o=None):
                 watch['uuid'] = uuid
                 sorted_watches.append(watch)
 
-        sorted_watches.sort(key=lambda x: x['last_changed'], reverse=True)
+        sorted_watches.sort(key=lambda x: x.last_changed, reverse=False)
 
         fg = FeedGenerator()
         fg.title('changedetection.io')
@@ -333,7 +333,7 @@ def changedetection_app(config=None, datastore_o=None):
             if not watch.viewed:
                 # Re #239 - GUID needs to be individual for each event
                 # @todo In the future make this a configurable link back (see work on BASE_URL https://github.com/dgtlmoon/changedetection.io/pull/228)
-                guid = "{}/{}".format(watch['uuid'], watch['last_changed'])
+                guid = "{}/{}".format(watch['uuid'], watch.last_changed)
                 fe = fg.add_entry()
 
                 # Include a link to the diff page, they will have to login here to see if password protection is enabled.
@@ -371,20 +371,20 @@ def changedetection_app(config=None, datastore_o=None):
         from changedetectionio import forms
 
         limit_tag = request.args.get('tag')
-        pause_uuid = request.args.get('pause')
-
         # Redirect for the old rss path which used the /?rss=true
         if request.args.get('rss'):
             return redirect(url_for('rss', tag=limit_tag))
 
-        if pause_uuid:
+        op = request.args.get('op')
-            try:
+        if op:
-                datastore.data['watching'][pause_uuid]['paused'] ^= True
+            uuid = request.args.get('uuid')
-                datastore.needs_write = True
+            if op == 'pause':
+                datastore.data['watching'][uuid]['paused'] ^= True
+            elif op == 'mute':
+                datastore.data['watching'][uuid]['notification_muted'] ^= True
 
-                return redirect(url_for('index', tag = limit_tag))
+            datastore.needs_write = True
-            except KeyError:
+            return redirect(url_for('index', tag = limit_tag))
-                pass
 
         # Sort by last_changed and add the uuid which is usually the key..
         sorted_watches = []
@@ -407,7 +407,6 @@ def changedetection_app(config=None, datastore_o=None):
         existing_tags = datastore.get_all_tags()
 
         form = forms.quickWatchForm(request.form)
-
         output = render_template("watch-overview.html",
                                  form=form,
                                  watches=sorted_watches,
@@ -418,7 +417,7 @@ 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=update_q.queue)
+                                 queued_uuids=[uuid for p,uuid in update_q.queue])
 
 
         if session.get('share-link'):
@@ -581,6 +580,9 @@ def changedetection_app(config=None, datastore_o=None):
         if request.method == 'POST' and form.validate():
             extra_update_obj = {}
 
+            if request.args.get('unpause_on_save'):
+                extra_update_obj['paused'] = False
+
             # Re #110, if they submit the same as the default value, set it to None, so we continue to follow the default
             # Assume we use the default value, unless something relevant is different, then use the form value
             # values could be None, 0 etc.
@@ -620,24 +622,23 @@ def changedetection_app(config=None, datastore_o=None):
             datastore.data['watching'][uuid].update(form.data)
             datastore.data['watching'][uuid].update(extra_update_obj)
 
-            flash("Updated watch.")
+            if request.args.get('unpause_on_save'):
+                flash("Updated watch - unpaused!.")
+            else:
+                flash("Updated watch.")
 
             # Re #286 - We wait for syncing new data to disk in another thread every 60 seconds
             # But in the case something is added we should save straight away
             datastore.needs_write_urgent = True
 
-            # Queue the watch for immediate recheck
+            # Queue the watch for immediate recheck, with a higher priority
-            update_q.put(uuid)
+            update_q.put((1, uuid))
 
             # Diff page [edit] link should go back to diff page
-            if request.args.get("next") and request.args.get("next") == 'diff' and not form.save_and_preview_button.data:
+            if request.args.get("next") and request.args.get("next") == 'diff':
                 return redirect(url_for('diff_history_page', uuid=uuid))
-            else:
+
-                if form.save_and_preview_button.data:
+            return redirect(url_for('index'))
-                    flash('You may need to reload this page to see the new content.')
-                    return redirect(url_for('preview_page', uuid=uuid))
-                else:
-                    return redirect(url_for('index'))
 
         else:
             if request.method == 'POST' and not form.validate():
@@ -703,7 +704,14 @@ def changedetection_app(config=None, datastore_o=None):
                     return redirect(url_for('settings_page'))
 
             if form.validate():
-                datastore.data['settings']['application'].update(form.data['application'])
+                # Don't set password to False when a password is set - should be only removed with the `removepassword` button
+                app_update = dict(deepcopy(form.data['application']))
+
+                # Never update password with '' or False (Added by wtforms when not in submission)
+                if 'password' in app_update and not app_update['password']:
+                    del (app_update['password'])
+
+                datastore.data['settings']['application'].update(app_update)
                 datastore.data['settings']['requests'].update(form.data['requests'])
 
                 if not os.getenv("SALTED_PASS", False) and len(form.application.form.password.encrypted_password):
@@ -741,7 +749,7 @@ 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(uuid)
+                    update_q.put((1, uuid))
 
                 if len(importer.remaining_data) == 0:
                     return redirect(url_for('index'))
@@ -754,7 +762,7 @@ 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(uuid)
+                    update_q.put((1, uuid))
 
 
 
@@ -823,7 +831,7 @@ def changedetection_app(config=None, datastore_o=None):
             previous_version_file_contents = "Unable to read {}.\n".format(previous_file)
 
 
-        screenshot_url = datastore.get_screenshot(uuid)
+        screenshot_url = watch.get_screenshot()
 
         system_uses_webdriver = datastore.data['settings']['application']['fetch_backend'] == 'html_webdriver'
 
@@ -843,7 +851,11 @@ def changedetection_app(config=None, datastore_o=None):
                                  extra_title=" - Diff - {}".format(watch['title'] if watch['title'] else watch['url']),
                                  left_sticky=True,
                                  screenshot=screenshot_url,
-                                 is_html_webdriver=is_html_webdriver)
+                                 is_html_webdriver=is_html_webdriver,
+                                 last_error=watch['last_error'],
+                                 last_error_text=watch.get_error_text(),
+                                 last_error_screenshot=watch.get_error_snapshot()
+                                 )
 
         return output
 
@@ -858,73 +870,82 @@ def changedetection_app(config=None, datastore_o=None):
         if uuid == 'first':
             uuid = list(datastore.data['watching'].keys()).pop()
 
-        # Normally you would never reach this, because the 'preview' button is not available when there's no history
-        # However they may try to clear snapshots and reload the page
-        if datastore.data['watching'][uuid].history_n == 0:
-            flash("Preview unavailable - No fetch/check completed or triggers not reached", "error")
-            return redirect(url_for('index'))
-
-        extra_stylesheets = [url_for('static_content', group='styles', filename='diff.css')]
-
         try:
             watch = datastore.data['watching'][uuid]
         except KeyError:
             flash("No history found for the specified link, bad link?", "error")
             return redirect(url_for('index'))
 
-        if watch.history_n >0:
-            timestamps = sorted(watch.history.keys(), key=lambda x: int(x))
-            filename = watch.history[timestamps[-1]]
-            try:
-                with open(filename, 'r') as f:
-                    tmp = f.readlines()
-
-                    # Get what needs to be highlighted
-                    ignore_rules = watch.get('ignore_text', []) + datastore.data['settings']['application']['global_ignore_text']
-
-                    # .readlines will keep the \n, but we will parse it here again, in the future tidy this up
-                    ignored_line_numbers = html_tools.strip_ignore_text(content="".join(tmp),
-                                                                        wordlist=ignore_rules,
-                                                                        mode='line numbers'
-                                                                        )
-
-                    trigger_line_numbers = html_tools.strip_ignore_text(content="".join(tmp),
-                                                                        wordlist=watch['trigger_text'],
-                                                                        mode='line numbers'
-                                                                        )
-                    # Prepare the classes and lines used in the template
-                    i=0
-                    for l in tmp:
-                        classes=[]
-                        i+=1
-                        if i in ignored_line_numbers:
-                            classes.append('ignored')
-                        if i in trigger_line_numbers:
-                            classes.append('triggered')
-                        content.append({'line': l, 'classes': ' '.join(classes)})
-
-
-            except Exception as e:
-                content.append({'line': "File doesnt exist or unable to read file {}".format(filename), 'classes': ''})
-        else:
-            content.append({'line': "No history found", 'classes': ''})
-
-        screenshot_url = datastore.get_screenshot(uuid)
         system_uses_webdriver = datastore.data['settings']['application']['fetch_backend'] == 'html_webdriver'
+        extra_stylesheets = [url_for('static_content', group='styles', filename='diff.css')]
+
 
         is_html_webdriver = True if watch.get('fetch_backend') == 'html_webdriver' or (
                 watch.get('fetch_backend', None) is None and system_uses_webdriver) else False
 
+        # Never requested successfully, but we detected a fetch error
+        if datastore.data['watching'][uuid].history_n == 0 and (watch.get_error_text() or watch.get_error_snapshot()):
+            flash("Preview unavailable - No fetch/check completed or triggers not reached", "error")
+            output = render_template("preview.html",
+                                     content=content,
+                                     history_n=watch.history_n,
+                                     extra_stylesheets=extra_stylesheets,
+#                                     current_diff_url=watch['url'],
+                                     watch=watch,
+                                     uuid=uuid,
+                                     is_html_webdriver=is_html_webdriver,
+                                     last_error=watch['last_error'],
+                                     last_error_text=watch.get_error_text(),
+                                     last_error_screenshot=watch.get_error_snapshot())
+            return output
+
+        timestamp = list(watch.history.keys())[-1]
+        filename = watch.history[timestamp]
+        try:
+            with open(filename, 'r') as f:
+                tmp = f.readlines()
+
+                # Get what needs to be highlighted
+                ignore_rules = watch.get('ignore_text', []) + datastore.data['settings']['application']['global_ignore_text']
+
+                # .readlines will keep the \n, but we will parse it here again, in the future tidy this up
+                ignored_line_numbers = html_tools.strip_ignore_text(content="".join(tmp),
+                                                                    wordlist=ignore_rules,
+                                                                    mode='line numbers'
+                                                                    )
+
+                trigger_line_numbers = html_tools.strip_ignore_text(content="".join(tmp),
+                                                                    wordlist=watch['trigger_text'],
+                                                                    mode='line numbers'
+                                                                    )
+                # Prepare the classes and lines used in the template
+                i=0
+                for l in tmp:
+                    classes=[]
+                    i+=1
+                    if i in ignored_line_numbers:
+                        classes.append('ignored')
+                    if i in trigger_line_numbers:
+                        classes.append('triggered')
+                    content.append({'line': l, 'classes': ' '.join(classes)})
+
+        except Exception as e:
+            content.append({'line': "File doesnt exist or unable to read file {}".format(filename), 'classes': ''})
+
         output = render_template("preview.html",
                                  content=content,
+                                 history_n=watch.history_n,
                                  extra_stylesheets=extra_stylesheets,
                                  ignored_line_numbers=ignored_line_numbers,
                                  triggered_line_numbers=trigger_line_numbers,
                                  current_diff_url=watch['url'],
-                                 screenshot=screenshot_url,
+                                 screenshot=watch.get_screenshot(),
                                  watch=watch,
                                  uuid=uuid,
-                                 is_html_webdriver=is_html_webdriver)
+                                 is_html_webdriver=is_html_webdriver,
+                                 last_error=watch['last_error'],
+                                 last_error_text=watch.get_error_text(),
+                                 last_error_screenshot=watch.get_error_snapshot())
 
         return output
 
@@ -1024,11 +1045,12 @@ def changedetection_app(config=None, datastore_o=None):
             if datastore.data['settings']['application']['password'] and not flask_login.current_user.is_authenticated:
                 abort(403)
 
+            screenshot_filename = "last-screenshot.png" if not request.args.get('error_screenshot') else "last-error-screenshot.png"
+
             # These files should be in our subdirectory
             try:
                 # set nocache, set content-type
-                watch_dir = datastore_o.datastore_path + "/" + filename
+                response = make_response(send_from_directory(os.path.join(datastore_o.datastore_path, filename), screenshot_filename))
-                response = make_response(send_from_directory(filename="last-screenshot.png", directory=watch_dir, path=watch_dir + "/last-screenshot.png"))
                 response.headers['Content-type'] = 'image/png'
                 response.headers['Cache-Control'] = 'no-cache, no-store, must-revalidate'
                 response.headers['Pragma'] = 'no-cache'
@@ -1064,9 +1086,9 @@ def changedetection_app(config=None, datastore_o=None):
         except FileNotFoundError:
             abort(404)
 
-    @app.route("/api/add", methods=['POST'])
+    @app.route("/form/add/quickwatch", methods=['POST'])
     @login_required
-    def form_watch_add():
+    def form_quick_watch_add():
         from changedetectionio import forms
         form = forms.quickWatchForm(request.form)
 
@@ -1079,13 +1101,19 @@ def changedetection_app(config=None, datastore_o=None):
             flash('The URL {} already exists'.format(url), "error")
             return redirect(url_for('index'))
 
-        # @todo add_watch should throw a custom Exception for validation etc
+        add_paused = request.form.get('edit_and_watch_submit_button') != None
-        new_uuid = datastore.add_watch(url=url, tag=request.form.get('tag').strip())
+        new_uuid = datastore.add_watch(url=url, tag=request.form.get('tag').strip(), extras={'paused': add_paused})
-        if new_uuid:
+
+
+        if not add_paused and new_uuid:
             # Straight into the queue.
-            update_q.put(new_uuid)
+            update_q.put((1, new_uuid))
             flash("Watch added.")
 
+        if add_paused:
+            flash('Watch added in Paused state, saving will unpause.')
+            return redirect(url_for('edit_page', uuid=new_uuid, unpause_on_save=1))
+
         return redirect(url_for('index'))
 
 
@@ -1116,7 +1144,7 @@ def changedetection_app(config=None, datastore_o=None):
             uuid = list(datastore.data['watching'].keys()).pop()
 
         new_uuid = datastore.clone(uuid)
-        update_q.put(new_uuid)
+        update_q.put((5, new_uuid))
         flash('Cloned.')
 
         return redirect(url_for('index'))
@@ -1137,7 +1165,7 @@ def changedetection_app(config=None, datastore_o=None):
 
         if uuid:
             if uuid not in running_uuids:
-                update_q.put(uuid)
+                update_q.put((1, uuid))
             i = 1
 
         elif tag != None:
@@ -1145,7 +1173,7 @@ def changedetection_app(config=None, datastore_o=None):
             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(watch_uuid)
+                        update_q.put((1, watch_uuid))
                         i += 1
 
         else:
@@ -1153,7 +1181,7 @@ def changedetection_app(config=None, datastore_o=None):
             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(watch_uuid)
+                    update_q.put((1, watch_uuid))
                     i += 1
         flash("{} watches are queued for rechecking.".format(i))
         return redirect(url_for('index', tag=tag))
@@ -1214,7 +1242,6 @@ def changedetection_app(config=None, datastore_o=None):
 
     # @todo handle ctrl break
     ticker_thread = threading.Thread(target=ticker_thread_check_time_launch_checks).start()
-    threading.Thread(target=ticker_thread_job_queue_processor).start()
 
     threading.Thread(target=notification_runner).start()
 
@@ -1256,7 +1283,6 @@ def notification_runner():
     global notification_debug_log
     from datetime import datetime
     import json
-
     while not app.config.exit.is_set():
         try:
             # At the moment only one thread runs (single runner)
@@ -1290,63 +1316,25 @@ def notification_runner():
             # Trim the log length
             notification_debug_log = notification_debug_log[-100:]
 
-# Check the queue, when a job exists, start a fresh thread of update_worker
-def ticker_thread_job_queue_processor():
-
-    from changedetectionio import update_worker
-    n_workers = int(os.getenv("FETCH_WORKERS", datastore.data['settings']['requests']['workers']))
-
-    while not app.config.exit.is_set():
-        time.sleep(0.3)
-
-        # Check that some threads are free
-        running = 0
-        for t in threading.enumerate():
-            if t.name == 'update_worker':
-                running += 1
-
-        if running >= n_workers:
-            continue
-
-        try:
-            uuid = update_q.get(block=False)
-        except queue.Empty:
-            # Go back to waiting for exit and/or another entry from the queue
-            continue
-        print ("Starting a thread fetch")
-
-
-        try:
-            # Launch the update_worker thread that will handle picking items off a queue and sending them off
-            # in the event that playwright or others have a memory leak, this should clean it up better than gc.collect()
-            # (By letting it exit entirely)
-            update_worker.update_worker(update_q, notification_q, app, datastore, uuid).start()
-        except Exception as e:
-            print ("Error launching update_worker for UUID {}.".format(uuid))
-            print (str(e))
-
-        print ("Running now {}", running)
-
-
 # Thread runner to check every minute, look for new watches to feed into the Queue.
 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)
 
-    # Can go in its own function
-
-    # Always maintain the minimum number of threads, each thread will terminate when it has processed exactly 1 queued watch
-    # This is to be totally sure that they don't leak memory
     # 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():
 
-        # Update our list of watches by UUID that are currently fetching data, used in the UI
+        # Get a list of watches by UUID that are currently fetching data
         running_uuids = []
         for t in running_update_threads:
             if t.current_uuid:
@@ -1396,14 +1384,14 @@ 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 update_q.queue:
+                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,
+                    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(uuid)
+                    update_q.put((5, uuid))
 
                     # Reset for next time
                     watch.jitter_seconds = 0

changedetectionio/api/api_v1.py

@@ -24,7 +24,7 @@ class Watch(Resource):
             abort(404, message='No watch exists with the UUID of {}'.format(uuid))
 
         if request.args.get('recheck'):
-            self.update_q.put(uuid)
+            self.update_q.put((1, uuid))
             return "OK", 200
 
         # Return without history, get that via another API call
@@ -100,7 +100,7 @@ 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(new_uuid)
+        self.update_q.put((1, new_uuid))
         return {'uuid': new_uuid}, 201
 
     # Return concise list of available watches and some very basic info
@@ -113,12 +113,12 @@ class CreateWatch(Resource):
             list[k] = {'url': v['url'],
                        'title': v['title'],
                        'last_checked': v['last_checked'],
-                       'last_changed': v['last_changed'],
+                       'last_changed': v.last_changed,
                        'last_error': v['last_error']}
 
         if request.args.get('recheck_all'):
             for uuid in self.datastore.data['watching'].keys():
-                self.update_q.put(uuid)
+                self.update_q.put((1, uuid))
             return {'status': "OK"}, 200
 
         return list, 200

changedetectionio/changedetection.py

@@ -4,6 +4,7 @@
 
 import getopt
 import os
+import signal
 import sys
 
 import eventlet
@@ -11,7 +12,21 @@ import eventlet.wsgi
 from . import store, changedetection_app, content_fetcher
 from . import __version__
 
+# Only global so we can access it in the signal handler
+datastore = None
+app = None
+
+def sigterm_handler(_signo, _stack_frame):
+    global app
+    global datastore
+#    app.config.exit.set()
+    print('Shutdown: Got SIGTERM, DB saved to disk')
+    datastore.sync_to_json()
+#    raise SystemExit
+
 def main():
+    global datastore
+    global app
     ssl_mode = False
     host = ''
     port = os.environ.get('PORT') or 5000
@@ -35,11 +50,6 @@ def main():
     create_datastore_dir = False
 
     for opt, arg in opts:
-        #        if opt == '--clear-all-history':
-        # Remove history, the actual files you need to delete manually.
-        #            for uuid, watch in datastore.data['watching'].items():
-        #                watch.update({'history': {}, 'last_checked': 0, 'last_changed': 0, 'previous_md5': None})
-
         if opt == '-s':
             ssl_mode = True
 
@@ -72,9 +82,12 @@ def main():
                 "Or use the -C parameter to create the directory.".format(app_config['datastore_path']), file=sys.stderr)
             sys.exit(2)
 
+
     datastore = store.ChangeDetectionStore(datastore_path=app_config['datastore_path'], version_tag=__version__)
     app = changedetection_app(app_config, datastore)
 
+    signal.signal(signal.SIGTERM, sigterm_handler)
+
     # Go into cleanup mode
     if do_cleanup:
         datastore.remove_unused_snapshots()
@@ -111,4 +124,3 @@ def main():
     else:
         eventlet.wsgi.server(eventlet.listen((host, int(port))), app)
 
-

changedetectionio/content_fetcher.py

@@ -6,38 +6,63 @@ import requests
 import time
 import sys
 
-class PageUnloadable(Exception):
+
-    def __init__(self, status_code, url):
+class Non200ErrorCodeReceived(Exception):
+    def __init__(self, status_code, url, screenshot=None, xpath_data=None, page_html=None):
         # 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.xpath_data = xpath_data
+        self.page_text = None
+
+        if page_html:
+            from changedetectionio import html_tools
+            self.page_text = html_tools.html_to_text(page_html)
+        return
+
+
+class JSActionExceptions(Exception):
+    def __init__(self, status_code, url, screenshot, message=''):
+        self.status_code = status_code
+        self.url = url
+        self.screenshot = screenshot
+        self.message = message
+        return
+
+class PageUnloadable(Exception):
+    def __init__(self, status_code, url, screenshot=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
         return
-    pass
 
 class EmptyReply(Exception):
-    def __init__(self, status_code, url):
+    def __init__(self, status_code, url, screenshot=None):
         # Set this so we can use it in other parts of the app
         self.status_code = status_code
         self.url = url
+        self.screenshot = screenshot
         return
-    pass
 
 class ScreenshotUnavailable(Exception):
-    def __init__(self, status_code, url):
+    def __init__(self, status_code, url, page_html=None):
         # Set this so we can use it in other parts of the app
         self.status_code = status_code
         self.url = url
+        if page_html:
+            from html_tools import html_to_text
+            self.page_text = html_to_text(page_html)
         return
-    pass
 
 class ReplyWithContentButNoText(Exception):
-    def __init__(self, status_code, url):
+    def __init__(self, status_code, url, screenshot=None):
         # Set this so we can use it in other parts of the app
         self.status_code = status_code
         self.url = url
+        self.screenshot = screenshot
         return
-    pass
-
 
 class Fetcher():
     error = None
@@ -63,12 +88,12 @@ class Fetcher():
                       break;
                     }
                     if('' !==r.id) {
-                      chained_css.unshift("#"+r.id);
+                      chained_css.unshift("#"+CSS.escape(r.id));
-                      final_selector= chained_css.join('>');
+                      final_selector= chained_css.join(' > ');
                       // Be sure theres only one, some sites have multiples of the same ID tag :-(
                       if (window.document.querySelectorAll(final_selector).length ==1 ) {
                         return final_selector;
-                      }
+                        }
                       return null;
                     } else {
                       chained_css.unshift(r.tagName.toLowerCase());
@@ -180,7 +205,7 @@ class Fetcher():
     system_https_proxy = os.getenv('HTTPS_PROXY')
 
     # Time ONTOP of the system defined env minimum time
-    render_extract_delay=0
+    render_extract_delay = 0
 
     @abstractmethod
     def get_error(self):
@@ -319,17 +344,16 @@ class base_html_playwright(Fetcher):
                 with page.expect_navigation():
                     response = page.goto(url, wait_until='load')
 
-                if self.webdriver_js_execute_code is not None:
-                    page.evaluate(self.webdriver_js_execute_code)
 
             except playwright._impl._api_types.TimeoutError as e:
                 context.close()
                 browser.close()
                 # This can be ok, we will try to grab what we could retrieve
                 pass
+
             except Exception as e:
-                print ("other exception when page.goto")
+                print("other exception when page.goto")
-                print (str(e))
+                print(str(e))
                 context.close()
                 browser.close()
                 raise PageUnloadable(url=url, status_code=None)
@@ -337,22 +361,36 @@ class base_html_playwright(Fetcher):
             if response is None:
                 context.close()
                 browser.close()
-                print ("response object was none")
+                print("response object was none")
                 raise EmptyReply(url=url, status_code=None)
 
             # Bug 2(?) Set the viewport size AFTER loading the page
-            page.set_viewport_size({"width": 1280, "height": 1024})            
+            page.set_viewport_size({"width": 1280, "height": 1024})
             extra_wait = int(os.getenv("WEBDRIVER_DELAY_BEFORE_CONTENT_READY", 5)) + self.render_extract_delay
             time.sleep(extra_wait)
+
+            if self.webdriver_js_execute_code is not None:
+                try:
+                    page.evaluate(self.webdriver_js_execute_code)
+                except Exception as e:
+                    # Is it possible to get a screenshot?
+                    error_screenshot = False
+                    try:
+                        page.screenshot(type='jpeg',
+                                        clip={'x': 1.0, 'y': 1.0, 'width': 1280, 'height': 1024},
+                                        quality=1)
+
+                        # The actual screenshot
+                        error_screenshot = page.screenshot(type='jpeg',
+                                                           full_page=True,
+                                                           quality=int(os.getenv("PLAYWRIGHT_SCREENSHOT_QUALITY", 72)))
+                    except Exception as s:
+                        pass
+
+                    raise JSActionExceptions(status_code=response.status, screenshot=error_screenshot, message=str(e), url=url)
+
             self.content = page.content()
             self.status_code = response.status
-
-            if len(self.content.strip()) == 0:
-                context.close()
-                browser.close()
-                print ("Content was empty")
-                raise EmptyReply(url=url, status_code=None)
-            
             self.headers = response.all_headers()
 
             if current_css_filter is not None:
@@ -379,9 +417,17 @@ class base_html_playwright(Fetcher):
                 browser.close()
                 raise ScreenshotUnavailable(url=url, status_code=None)
 
+            if len(self.content.strip()) == 0:
+                context.close()
+                browser.close()
+                print("Content was empty")
+                raise EmptyReply(url=url, status_code=None, screenshot=self.screenshot)
+
             context.close()
             browser.close()
 
+            if not ignore_status_codes and self.status_code!=200:
+                raise Non200ErrorCodeReceived(url=url, status_code=self.status_code, page_html=self.content, screenshot=self.screenshot)
 
 class base_html_webdriver(Fetcher):
     if os.getenv("WEBDRIVER_URL"):
@@ -509,7 +555,7 @@ class html_requests(Fetcher):
             ignore_status_codes=False,
             current_css_filter=None):
 
-        proxies={}
+        proxies = {}
 
         # Allows override the proxy on a per-request basis
         if self.proxy_override:
@@ -537,10 +583,14 @@ class html_requests(Fetcher):
             if encoding:
                 r.encoding = encoding
 
+        if not r.content or not len(r.content):
+            raise EmptyReply(url=url, status_code=r.status_code)
+
         # @todo test this
         # @todo maybe you really want to test zero-byte return pages?
-        if (not ignore_status_codes and not r) or not r.content or not len(r.content):
+        if r.status_code != 200 and not ignore_status_codes:
-            raise EmptyReply(url=url, status_code=r.status_code)
+            # maybe check with content works?
+            raise Non200ErrorCodeReceived(url=url, status_code=r.status_code, page_html=r.text)
 
         self.status_code = r.status_code
         self.content = r.text

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)
@@ -94,7 +96,7 @@ class perform_site_check():
         url = self.datastore.get_val(uuid, 'url')
         request_body = self.datastore.get_val(uuid, 'body')
         request_method = self.datastore.get_val(uuid, 'method')
-        ignore_status_code = self.datastore.get_val(uuid, 'ignore_status_codes')
+        ignore_status_codes = self.datastore.data['watching'][uuid].get('ignore_status_codes', False)
 
         # source: support
         is_source = False
@@ -124,9 +126,12 @@ class perform_site_check():
         if watch['webdriver_js_execute_code'] is not None and watch['webdriver_js_execute_code'].strip():
             fetcher.webdriver_js_execute_code = watch['webdriver_js_execute_code']
 
-        fetcher.run(url, timeout, request_headers, request_body, request_method, ignore_status_code, watch['css_filter'])
+        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?
 
@@ -210,7 +215,7 @@ class perform_site_check():
         # Treat pages with no renderable text content as a change? No by default
         empty_pages_are_a_change = self.datastore.data['settings']['application'].get('empty_pages_are_a_change', False)
         if not is_json and not empty_pages_are_a_change and len(stripped_text_from_html.strip()) == 0:
-            raise content_fetcher.ReplyWithContentButNoText(url=url, status_code=200)
+            raise content_fetcher.ReplyWithContentButNoText(url=url, status_code=fetcher.get_last_status_code(), screenshot=screenshot)
 
         # We rely on the actual text in the html output.. many sites have random script vars etc,
         # in the future we'll implement other mechanisms.
@@ -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

@@ -308,6 +308,9 @@ class ValidateCSSJSONXPATHInput(object):
 class quickWatchForm(Form):
     url = fields.URLField('URL', validators=[validateURL()])
     tag = StringField('Group tag', [validators.Optional()])
+    watch_submit_button = SubmitField('Watch', render_kw={"class": "pure-button pure-button-primary"})
+    edit_and_watch_submit_button = SubmitField('Edit > Watch', render_kw={"class": "pure-button pure-button-primary"})
+
 
 # Common to a single watch and the global settings
 class commonSettingsForm(Form):
@@ -347,7 +350,7 @@ class watchForm(commonSettingsForm):
     webdriver_js_execute_code = TextAreaField('Execute JavaScript before change detection', render_kw={"rows": "5"}, validators=[validators.Optional()])
 
     save_button = SubmitField('Save', render_kw={"class": "pure-button pure-button-primary"})
-    save_and_preview_button = SubmitField('Save & Preview', render_kw={"class": "pure-button pure-button-primary"})
+
     proxy = RadioField('Proxy')
     filter_failure_notification_send = BooleanField(
         'Send a notification when the filter can no longer be found on the page', default=False)
@@ -381,7 +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/html_tools.py

@@ -4,6 +4,8 @@ from typing import List
 from bs4 import BeautifulSoup
 from jsonpath_ng.ext import parse
 import re
+from inscriptis import get_text
+from inscriptis.model.config import ParserConfig
 
 class FilterNotFoundInResponse(ValueError):
     def __init__(self, msg):
@@ -50,8 +52,15 @@ def xpath_filter(xpath_filter, html_content):
     if len(html_content) > 0 and len(r) == 0:
         raise FilterNotFoundInResponse(xpath_filter)
 
-    for item in r:
+    #@note: //title/text() wont work where <title>CDATA..
-        html_block += etree.tostring(item, pretty_print=True).decode('utf-8') + "<br/>"
+
+    for element in r:
+        if type(element) == etree._ElementStringResult:
+            html_block += str(element) + "<br/>"
+        elif type(element) == etree._ElementUnicodeResult:
+            html_block += str(element) + "<br/>"
+        else:
+            html_block += etree.tostring(element, pretty_print=True).decode('utf-8') + "<br/>"
 
     return html_block
 
@@ -181,16 +190,9 @@ def strip_ignore_text(content, wordlist, mode="content"):
 
 
 def html_to_text(html_content: str, render_anchor_tag_content=False) -> str:
-    import multiprocessing
-
-    from inscriptis.model.config import ParserConfig
-
     """Converts html string to a string with just the text. If ignoring
     rendering anchor tag content is enable, anchor tag content are also
     included in the text
-    
-    @NOTE: HORRIBLE LXML INDUCED MEMORY LEAK WORKAROUND HERE 
-           https://www.reddit.com/r/Python/comments/j0gl8t/psa_pythonlxml_memory_leaks_and_a_solution/ 
 
     :param html_content: string with html content
     :param render_anchor_tag_content: boolean flag indicating whether to extract
@@ -212,19 +214,8 @@ def html_to_text(html_content: str, render_anchor_tag_content=False) -> str:
     else:
         parser_config = None
 
-
+    # get text and annotations via inscriptis
-    def parse_function(html_content, parser_config, results_queue):
+    text_content = get_text(html_content, config=parser_config)
-        from inscriptis import get_text
-        # get text and annotations via inscriptis
-        text_content = get_text(html_content, config=parser_config)
-        results_queue.put(text_content)
-
-    results_queue = multiprocessing.Queue()
-    parse_process = multiprocessing.Process(target=parse_function, args=(html_content, parser_config, results_queue))
-    parse_process.daemon = True
-    parse_process.start()
-    text_content = results_queue.get()  # blocks until results are available
-    parse_process.terminate()
 
     return text_content
 

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

@@ -19,7 +19,6 @@ class model(dict):
             'url': None,
             'tag': None,
             'last_checked': 0,
-            'last_changed': 0,
             'paused': False,
             'last_viewed': 0,  # history key value of the last viewed via the [diff] link
             #'newest_history_key': 0,
@@ -36,7 +35,9 @@ class model(dict):
             'notification_title': default_notification_title,
             'notification_body': default_notification_body,
             'notification_format': default_notification_format,
+            'notification_muted': False,
             'css_filter': '',
+            'last_error': False,
             'extract_text': [],  # Extract text by regex after filters
             'subtractive_selectors': [],
             'trigger_text': [],  # List of text or regex to wait for until a change is detected
@@ -57,11 +58,11 @@ class model(dict):
     jitter_seconds = 0
 
     def __init__(self, *arg, **kw):
-        import uuid
+
         self.update(self.__base_config)
         self.__datastore_path = kw['datastore_path']
 
-        self['uuid'] = str(uuid.uuid4())
+        self['uuid'] = str(uuid_builder.uuid4())
 
         del kw['datastore_path']
 
@@ -69,7 +70,10 @@ class model(dict):
             self.update(kw['default'])
             del kw['default']
 
-        # goes at the end so we update the default object with the initialiser
+        # Be sure the cached timestamp is ready
+        bump = self.history
+
+        # Goes at the end so we update the default object with the initialiser
         super(model, self).__init__(*arg, **kw)
 
     @property
@@ -79,6 +83,28 @@ 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
+        if self['title']:
+            return self['title']
+        return self['url']
+
+    @property
+    def last_changed(self):
+        # last_changed will be the newest snapshot, but when we have just one snapshot, it should be 0
+        if self.__history_n <= 1:
+            return 0
+        if self.__newest_history_key:
+            return int(self.__newest_history_key)
+        return 0
+
     @property
     def history_n(self):
         return self.__history_n
@@ -121,19 +147,15 @@ class model(dict):
         bump = self.history
         return self.__newest_history_key
 
-
     # Save some text file to the appropriate path and bump the history
     # result_obj from fetch_site_status.run()
     def save_history_text(self, contents, timestamp):
         import uuid
-        from os import mkdir, path, unlink
         import logging
 
         output_path = "{}/{}".format(self.__datastore_path, self['uuid'])
 
-        # Incase the operator deleted it, check and create.
+        self.ensure_data_dir_exists()
-        if not os.path.isdir(output_path):
-            mkdir(output_path)
 
         snapshot_fname = "{}/{}.stripped.txt".format(output_path, uuid.uuid4())
         logging.debug("Saving history text {}".format(snapshot_fname))
@@ -171,14 +193,63 @@ class model(dict):
         return seconds
 
     # Iterate over all history texts and see if something new exists
-    def lines_contain_something_unique_compared_to_history(self, lines=[]):
+    def lines_contain_something_unique_compared_to_history(self, lines: list):
-        local_lines = [l.decode('utf-8').strip().lower() for l in lines]
+        local_lines = set([l.decode('utf-8').strip().lower() for l in lines])
 
         # Compare each lines (set) against each history text file (set) looking for something new..
+        existing_history = set({})
         for k, v in self.history.items():
-            alist = [line.decode('utf-8').strip().lower() for line in open(v, 'rb')]
+            alist = set([line.decode('utf-8').strip().lower() for line in open(v, 'rb')])
-            res = set(alist) != set(local_lines)
+            existing_history = existing_history.union(alist)
-            if res:
+
-                return True
+        # Check that everything in local_lines(new stuff) already exists in existing_history - it should
+        # if not, something new happened
+        return not local_lines.issubset(existing_history)
+
+    def get_screenshot(self):
+        fname = os.path.join(self.__datastore_path, self['uuid'], "last-screenshot.png")
+        if os.path.isfile(fname):
+            return fname
 
         return False
+
+    def __get_file_ctime(self, filename):
+        fname = os.path.join(self.__datastore_path, self['uuid'], filename)
+        if os.path.isfile(fname):
+            return int(os.path.getmtime(fname))
+        return False
+
+    @property
+    def error_text_ctime(self):
+        return self.__get_file_ctime('last-error.txt')
+
+    @property
+    def snapshot_text_ctime(self):
+        if self.history_n==0:
+            return False
+
+        timestamp = list(self.history.keys())[-1]
+        return int(timestamp)
+
+    @property
+    def snapshot_screenshot_ctime(self):
+        return self.__get_file_ctime('last-screenshot.png')
+
+    @property
+    def snapshot_error_screenshot_ctime(self):
+        return self.__get_file_ctime('last-error-screenshot.png')
+
+    def get_error_text(self):
+        """Return the text saved from a previous request that resulted in a non-200 error"""
+        fname = os.path.join(self.__datastore_path, self['uuid'], "last-error.txt")
+        if os.path.isfile(fname):
+            with open(fname, 'r') as f:
+                return f.read()
+        return False
+
+    def get_error_snapshot(self):
+        """Return path to the screenshot that resulted in a non-200 error"""
+        fname = os.path.join(self.__datastore_path, self['uuid'], "last-error-screenshot.png")
+        if os.path.isfile(fname):
+            return fname
+        return False

changedetectionio/notification.py

@@ -78,7 +78,7 @@ def process_notification(n_object, datastore):
                     n_title = n_title[0:payload_max_size]
                     n_body = n_body[0:body_limit]
 
-                elif url.startswith('discord://') or url.startswith('https://discordapp.com/api/webhooks'):
+                elif url.startswith('discord://') or url.startswith('https://discordapp.com/api/webhooks') or url.startswith('https://discord.com/api'):
                     # real limit is 2000, but minus some for extra metadata
                     payload_max_size = 1700
                     body_limit = max(0, payload_max_size - len(n_title))

changedetectionio/run_all_tests.sh

@@ -32,16 +32,20 @@ docker run -d --name $$-test_selenium  -p 4444:4444 --rm --shm-size="2g"  seleni
 sleep 5
 export WEBDRIVER_URL=http://localhost:4444/wd/hub
 pytest tests/fetchers/test_content.py
+pytest tests/test_errorhandling.py
 unset WEBDRIVER_URL
 docker kill $$-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/images/bell-off.svg

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   width="15"
+   height="16.363636"
+   viewBox="0 0 15 16.363636"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="bell-off.svg"
+   inkscape:version="1.1.1 (1:1.1+202109281949+c3084ef5ed)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview5"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     fit-margin-top="0"
+     fit-margin-left="0"
+     fit-margin-right="0"
+     fit-margin-bottom="0"
+     inkscape:zoom="28.416667"
+     inkscape:cx="-0.59824046"
+     inkscape:cy="12"
+     inkscape:window-width="1554"
+     inkscape:window-height="896"
+     inkscape:window-x="2095"
+     inkscape:window-y="107"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg4" />
+  <defs
+     id="defs8" />
+  <path
+     d="m 14.318182,11.762045 v 1.1925 H 5.4102273 L 11.849318,7.1140909 C 12.234545,9.1561364 12.54,11.181818 14.318182,11.762045 Z m -6.7984093,4.601591 c 1.0759091,0 2.0256823,-0.955909 2.0256823,-2.045454 H 5.4545455 c 0,1.089545 0.9879545,2.045454 2.0652272,2.045454 z M 15,2.8622727 0.9177273,15.636136 0,14.627045 l 1.8443182,-1.6725 h -1.1625 v -1.1925 C 4.0070455,10.677273 2.1784091,4.5388636 5.3611364,2.6897727 5.8009091,2.4347727 6.0709091,1.9609091 6.0702273,1.4488636 v -0.00205 C 6.0702273,0.64772727 6.7104545,0 7.5,0 8.2895455,0 8.9297727,0.64772727 8.9297727,1.4468182 v 0.00205 C 8.9290909,1.9602319 9.199773,2.4354591 9.638864,2.6897773 10.364318,3.111141 10.827273,3.7568228 11.1525,4.5129591 L 14.085682,1.8531818 Z M 6.8181818,1.3636364 C 6.8181818,1.74 7.1236364,2.0454545 7.5,2.0454545 7.8763636,2.0454545 8.1818182,1.74 8.1818182,1.3636364 8.1818182,0.98795455 7.8763636,0.68181818 7.5,0.68181818 c -0.3763636,0 -0.6818182,0.30613637 -0.6818182,0.68181822 z"
+     id="path2"
+     style="fill:#f8321b;stroke-width:0.681818;fill-opacity:1" />
+</svg>

changedetectionio/static/js/diff-overview.js

@@ -10,7 +10,13 @@ $(document).ready(function () {
         if (hash_name === '#screenshot') {
             $("img#screenshot-img").attr('src', screenshot_url);
             $("#settings").hide();
-        } else {
+        } else if (hash_name === '#error-screenshot') {
+            $("img#error-screenshot-img").attr('src', error_screenshot_url);
+            $("#settings").hide();
+        }
+
+
+        else {
             $("#settings").show();
         }
     }

changedetectionio/static/js/tabs.js

@@ -1,51 +1,44 @@
 // Rewrite this is a plugin.. is all this JS really 'worth it?'
 
-
+window.addEventListener('hashchange', function () {
-if(!window.location.hash) {
+    var tabs = document.getElementsByClassName('active');
-  var tab=document.querySelectorAll("#default-tab a");
+    while (tabs[0]) {
-  tab[0].click();
+        tabs[0].classList.remove('active')
-}
+    }
-
+    set_active_tab();
-window.addEventListener('hashchange', function() {
-  var tabs = document.getElementsByClassName('active');
-  while (tabs[0]) {
-    tabs[0].classList.remove('active')
-  }
-  set_active_tab();
 }, false);
 
-var has_errors=document.querySelectorAll(".messages .error");
+var has_errors = document.querySelectorAll(".messages .error");
 if (!has_errors.length) {
-    if (document.location.hash == "" ) {
+    if (document.location.hash == "") {
-        document.location.hash = "#general";
+        document.querySelector(".tabs ul li:first-child a").click();
-        document.getElementById("default-tab").className = "active";
     } else {
         set_active_tab();
     }
 } else {
-  focus_error_tab();
+    focus_error_tab();
 }
 
 function set_active_tab() {
-  var tab=document.querySelectorAll("a[href='"+location.hash+"']");
+    var tab = document.querySelectorAll("a[href='" + location.hash + "']");
-  if (tab.length) {
+    if (tab.length) {
-    tab[0].parentElement.className="active";
+        tab[0].parentElement.className = "active";
-  }
+    }
     // hash could move the page down
     window.scrollTo(0, 0);
 }
 
 function focus_error_tab() {
-  // time to use jquery or vuejs really,
+    // time to use jquery or vuejs really,
-  // activate the tab with the error
+    // activate the tab with the error
-    var tabs = document.querySelectorAll('.tabs li a'),i;
+    var tabs = document.querySelectorAll('.tabs li a'), i;
     for (i = 0; i < tabs.length; ++i) {
-      var tab_name=tabs[i].hash.replace('#','');
+        var tab_name = tabs[i].hash.replace('#', '');
-      var pane_errors=document.querySelectorAll('#'+tab_name+' .error')
+        var pane_errors = document.querySelectorAll('#' + tab_name + ' .error')
-      if (pane_errors.length) {
+        if (pane_errors.length) {
-        document.location.hash = '#'+tab_name;
+            document.location.hash = '#' + tab_name;
-        return true;
+            return true;
-      }
+        }
     }
     return false;
 }

changedetectionio/static/styles/parts/_arrows.scss

@@ -0,0 +1,26 @@
+.arrow {
+  border: solid #1b98f8;
+  border-width: 0 2px 2px 0;
+  display: inline-block;
+  padding: 3px;
+
+  &.right {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg);
+  }
+
+  &.left {
+    transform: rotate(135deg);
+    -webkit-transform: rotate(135deg);
+  }
+
+  &.up, &.asc {
+    transform: rotate(-135deg);
+    -webkit-transform: rotate(-135deg);
+  }
+
+  &.down, &.desc {
+    transform: rotate(45deg);
+    -webkit-transform: rotate(45deg);
+  }
+}

changedetectionio/static/styles/styles.css

@@ -1,11 +1,27 @@
 /*
  * -- BASE STYLES --
  * Most of these are inherited from Base, but I want to change a few.
- * nvm use v14.18.1
+ * nvm use v14.18.1 && npm install && npm run build
- * npm install
- * npm run build
  * or npm run watch
  */
+.arrow {
+  border: solid #1b98f8;
+  border-width: 0 2px 2px 0;
+  display: inline-block;
+  padding: 3px; }
+  .arrow.right {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg); }
+  .arrow.left {
+    transform: rotate(135deg);
+    -webkit-transform: rotate(135deg); }
+  .arrow.up, .arrow.asc {
+    transform: rotate(-135deg);
+    -webkit-transform: rotate(-135deg); }
+  .arrow.down, .arrow.desc {
+    transform: rotate(45deg);
+    -webkit-transform: rotate(45deg); }
+
 body {
   color: #333;
   background: #262626; }
@@ -55,6 +71,12 @@ code {
     white-space: normal; }
   .watch-table th {
     white-space: nowrap; }
+    .watch-table th a {
+      font-weight: normal; }
+      .watch-table th a.active {
+        font-weight: bolder; }
+      .watch-table th a.inactive .arrow {
+        display: none; }
   .watch-table .title-col a[target="_blank"]::after, .watch-table .current-diff-url::after {
     content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAQElEQVR42qXKwQkAIAxDUUdxtO6/RBQkQZvSi8I/pL4BoGw/XPkh4XigPmsUgh0626AjRsgxHTkUThsG2T/sIlzdTsp52kSS1wAAAABJRU5ErkJggg==);
     margin: 0 3px 0 5px; }
@@ -105,24 +127,6 @@ body:after, body:before {
   -webkit-clip-path: polygon(100% 0, 0 0, 0 77.5%, 1% 77.4%, 2% 77.1%, 3% 76.6%, 4% 75.9%, 5% 75.05%, 6% 74.05%, 7% 72.95%, 8% 71.75%, 9% 70.55%, 10% 69.3%, 11% 68.05%, 12% 66.9%, 13% 65.8%, 14% 64.8%, 15% 64%, 16% 63.35%, 17% 62.85%, 18% 62.6%, 19% 62.5%, 20% 62.65%, 21% 63%, 22% 63.5%, 23% 64.2%, 24% 65.1%, 25% 66.1%, 26% 67.2%, 27% 68.4%, 28% 69.65%, 29% 70.9%, 30% 72.15%, 31% 73.3%, 32% 74.35%, 33% 75.3%, 34% 76.1%, 35% 76.75%, 36% 77.2%, 37% 77.45%, 38% 77.5%, 39% 77.3%, 40% 76.95%, 41% 76.4%, 42% 75.65%, 43% 74.75%, 44% 73.75%, 45% 72.6%, 46% 71.4%, 47% 70.15%, 48% 68.9%, 49% 67.7%, 50% 66.55%, 51% 65.5%, 52% 64.55%, 53% 63.75%, 54% 63.15%, 55% 62.75%, 56% 62.55%, 57% 62.5%, 58% 62.7%, 59% 63.1%, 60% 63.7%, 61% 64.45%, 62% 65.4%, 63% 66.45%, 64% 67.6%, 65% 68.8%, 66% 70.05%, 67% 71.3%, 68% 72.5%, 69% 73.6%, 70% 74.65%, 71% 75.55%, 72% 76.35%, 73% 76.9%, 74% 77.3%, 75% 77.5%, 76% 77.45%, 77% 77.25%, 78% 76.8%, 79% 76.2%, 80% 75.4%, 81% 74.45%, 82% 73.4%, 83% 72.25%, 84% 71.05%, 85% 69.8%, 86% 68.55%, 87% 67.35%, 88% 66.2%, 89% 65.2%, 90% 64.3%, 91% 63.55%, 92% 63%, 93% 62.65%, 94% 62.5%, 95% 62.55%, 96% 62.8%, 97% 63.3%, 98% 63.9%, 99% 64.75%, 100% 65.7%);
   clip-path: polygon(100% 0, 0 0, 0 77.5%, 1% 77.4%, 2% 77.1%, 3% 76.6%, 4% 75.9%, 5% 75.05%, 6% 74.05%, 7% 72.95%, 8% 71.75%, 9% 70.55%, 10% 69.3%, 11% 68.05%, 12% 66.9%, 13% 65.8%, 14% 64.8%, 15% 64%, 16% 63.35%, 17% 62.85%, 18% 62.6%, 19% 62.5%, 20% 62.65%, 21% 63%, 22% 63.5%, 23% 64.2%, 24% 65.1%, 25% 66.1%, 26% 67.2%, 27% 68.4%, 28% 69.65%, 29% 70.9%, 30% 72.15%, 31% 73.3%, 32% 74.35%, 33% 75.3%, 34% 76.1%, 35% 76.75%, 36% 77.2%, 37% 77.45%, 38% 77.5%, 39% 77.3%, 40% 76.95%, 41% 76.4%, 42% 75.65%, 43% 74.75%, 44% 73.75%, 45% 72.6%, 46% 71.4%, 47% 70.15%, 48% 68.9%, 49% 67.7%, 50% 66.55%, 51% 65.5%, 52% 64.55%, 53% 63.75%, 54% 63.15%, 55% 62.75%, 56% 62.55%, 57% 62.5%, 58% 62.7%, 59% 63.1%, 60% 63.7%, 61% 64.45%, 62% 65.4%, 63% 66.45%, 64% 67.6%, 65% 68.8%, 66% 70.05%, 67% 71.3%, 68% 72.5%, 69% 73.6%, 70% 74.65%, 71% 75.55%, 72% 76.35%, 73% 76.9%, 74% 77.3%, 75% 77.5%, 76% 77.45%, 77% 77.25%, 78% 76.8%, 79% 76.2%, 80% 75.4%, 81% 74.45%, 82% 73.4%, 83% 72.25%, 84% 71.05%, 85% 69.8%, 86% 68.55%, 87% 67.35%, 88% 66.2%, 89% 65.2%, 90% 64.3%, 91% 63.55%, 92% 63%, 93% 62.65%, 94% 62.5%, 95% 62.55%, 96% 62.8%, 97% 63.3%, 98% 63.9%, 99% 64.75%, 100% 65.7%); }
 
-.arrow {
-  border: solid black;
-  border-width: 0 3px 3px 0;
-  display: inline-block;
-  padding: 3px; }
-  .arrow.right {
-    transform: rotate(-45deg);
-    -webkit-transform: rotate(-45deg); }
-  .arrow.left {
-    transform: rotate(135deg);
-    -webkit-transform: rotate(135deg); }
-  .arrow.up {
-    transform: rotate(-135deg);
-    -webkit-transform: rotate(-135deg); }
-  .arrow.down {
-    transform: rotate(45deg);
-    -webkit-transform: rotate(45deg); }
-
 .button-small {
   font-size: 85%; }
 
@@ -203,13 +207,18 @@ body:after, body:before {
   border-radius: 10px;
   margin-bottom: 1em; }
   #new-watch-form input {
-    width: auto !important;
+    display: inline-block;
-    display: inline-block; }
+    margin-bottom: 5px; }
   #new-watch-form .label {
     display: none; }
   #new-watch-form legend {
     color: #fff;
     font-weight: bold; }
+  #new-watch-form #watch-add-wrapper-zone > div {
+    display: inline-block; }
+  @media only screen and (max-width: 760px) {
+    #new-watch-form #watch-add-wrapper-zone #url {
+      width: 100%; } }
 
 #diff-col {
   padding-left: 40px; }
@@ -268,11 +277,15 @@ footer {
 #new-version-text a {
   color: #e07171; }
 
-.paused-state.state-False img {
+.watch-controls {
-  opacity: 0.2; }
+  /* default */ }
-
+  .watch-controls .state-on img {
-.paused-state.state-False:hover img {
+    opacity: 0.8; }
-  opacity: 0.8; }
+  .watch-controls img {
+    opacity: 0.2; }
+  .watch-controls img:hover {
+    transition: opacity 0.3s;
+    opacity: 0.8; }
 
 .monospaced-textarea textarea {
   width: 100%;
@@ -532,3 +545,13 @@ ul {
   100% {
     -webkit-transform: rotate(360deg);
     transform: rotate(360deg); } }
+
+.snapshot-age {
+  padding: 4px;
+  background-color: #dfdfdf;
+  border-radius: 3px;
+  font-weight: bold;
+  margin-bottom: 4px; }
+  .snapshot-age.error {
+    background-color: #ff0000;
+    color: #fff; }

changedetectionio/static/styles/styles.scss

@@ -1,11 +1,11 @@
 /*
  * -- BASE STYLES --
  * Most of these are inherited from Base, but I want to change a few.
- * nvm use v14.18.1
+ * nvm use v14.18.1 && npm install && npm run build
- * npm install
- * npm run build
  * or npm run watch
  */
+@import "parts/_arrows.scss";
+
 body {
   color: #333;
   background: #262626;
@@ -70,6 +70,17 @@ code {
 
   th {
     white-space: nowrap;
+    a {
+      font-weight: normal;
+      &.active {
+        font-weight: bolder;
+      }
+      &.inactive {
+        .arrow {
+          display: none;
+        }
+      }
+    }
   }
 
   .title-col a[target="_blank"]::after, .current-diff-url::after {
@@ -139,29 +150,6 @@ body:after, body:before {
   clip-path: polygon(100% 0, 0 0, 0 77.5%, 1% 77.4%, 2% 77.1%, 3% 76.6%, 4% 75.9%, 5% 75.05%, 6% 74.05%, 7% 72.95%, 8% 71.75%, 9% 70.55%, 10% 69.3%, 11% 68.05%, 12% 66.9%, 13% 65.8%, 14% 64.8%, 15% 64%, 16% 63.35%, 17% 62.85%, 18% 62.6%, 19% 62.5%, 20% 62.65%, 21% 63%, 22% 63.5%, 23% 64.2%, 24% 65.1%, 25% 66.1%, 26% 67.2%, 27% 68.4%, 28% 69.65%, 29% 70.9%, 30% 72.15%, 31% 73.3%, 32% 74.35%, 33% 75.3%, 34% 76.1%, 35% 76.75%, 36% 77.2%, 37% 77.45%, 38% 77.5%, 39% 77.3%, 40% 76.95%, 41% 76.4%, 42% 75.65%, 43% 74.75%, 44% 73.75%, 45% 72.6%, 46% 71.4%, 47% 70.15%, 48% 68.9%, 49% 67.7%, 50% 66.55%, 51% 65.5%, 52% 64.55%, 53% 63.75%, 54% 63.15%, 55% 62.75%, 56% 62.55%, 57% 62.5%, 58% 62.7%, 59% 63.1%, 60% 63.7%, 61% 64.45%, 62% 65.4%, 63% 66.45%, 64% 67.6%, 65% 68.8%, 66% 70.05%, 67% 71.3%, 68% 72.5%, 69% 73.6%, 70% 74.65%, 71% 75.55%, 72% 76.35%, 73% 76.9%, 74% 77.3%, 75% 77.5%, 76% 77.45%, 77% 77.25%, 78% 76.8%, 79% 76.2%, 80% 75.4%, 81% 74.45%, 82% 73.4%, 83% 72.25%, 84% 71.05%, 85% 69.8%, 86% 68.55%, 87% 67.35%, 88% 66.2%, 89% 65.2%, 90% 64.3%, 91% 63.55%, 92% 63%, 93% 62.65%, 94% 62.5%, 95% 62.55%, 96% 62.8%, 97% 63.3%, 98% 63.9%, 99% 64.75%, 100% 65.7%)
 }
 
-.arrow {
-  border: solid black;
-  border-width: 0 3px 3px 0;
-  display: inline-block;
-  padding: 3px;
-    &.right {
-      transform: rotate(-45deg);
-      -webkit-transform: rotate(-45deg);
-    }
-    &.left {
-      transform: rotate(135deg);
-      -webkit-transform: rotate(135deg);
-    }
-    &.up {
-      transform: rotate(-135deg);
-      -webkit-transform: rotate(-135deg);
-    }
-    &.down {
-      transform: rotate(45deg);
-      -webkit-transform: rotate(45deg);
-    }
-}
-
 .button-small {
   font-size: 85%;
 }
@@ -269,8 +257,8 @@ body:after, body:before {
   border-radius: 10px;
   margin-bottom: 1em;
   input {
-    width: auto !important;
     display: inline-block;
+    margin-bottom: 5px;
   }
   .label {
     display: none;
@@ -279,6 +267,17 @@ body:after, body:before {
     color: #fff;
     font-weight: bold;
   }
+
+  #watch-add-wrapper-zone {
+    > div {
+      display: inline-block;
+    }
+    @media only screen and (max-width: 760px) {
+      #url {
+        width: 100%;
+      }
+    }
+  }
 }
 
 
@@ -353,14 +352,25 @@ footer {
   color: #e07171;
 }
 
-.paused-state {
+.watch-controls {
-  &.state-False img {
+  .state-on {
+    img {
+      opacity: 0.8;
+    }
+  }
+
+  /* default */
+  img {
     opacity: 0.2;
   }
 
-  &.state-False:hover img {
+  img {
-    opacity: 0.8;
+    &:hover {
+      transition: opacity 0.3s;
+      opacity: 0.8;
+    }
   }
+
 }
 
 .monospaced-textarea {
@@ -492,6 +502,7 @@ and also iPads specifically.
         vertical-align: middle;
       }
     }
+
     .last-checked::before {
       color: #555;
       content: "Last Checked ";
@@ -751,3 +762,15 @@ ul {
   }
 }
 
+.snapshot-age {
+  padding: 4px;
+  background-color: #dfdfdf;
+  border-radius: 3px;
+  font-weight: bold;
+  margin-bottom: 4px;
+  &.error {
+    background-color: #ff0000;
+    color: #fff;
+  }
+}
+

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
@@ -254,7 +254,6 @@ class ChangeDetectionStore:
 
         self.__data['watching'][uuid].update(
             {'last_checked': 0,
-             'last_changed': 0,
              'last_viewed': 0,
              'previous_md5': False,
              'last_notification_error': False,
@@ -325,25 +324,12 @@ class ChangeDetectionStore:
             new_watch.update(apply_extras)
             self.__data['watching'][new_uuid]=new_watch
 
-        # Get the directory ready
+        self.__data['watching'][new_uuid].ensure_data_dir_exists()
-        output_path = "{}/{}".format(self.datastore_path, new_uuid)
-        try:
-            mkdir(output_path)
-        except FileExistsError:
-            print(output_path, "already exists.")
 
         if write_to_disk_now:
             self.sync_to_json()
         return new_uuid
 
-    def get_screenshot(self, watch_uuid):
-        output_path = "{}/{}".format(self.datastore_path, watch_uuid)
-        fname = "{}/last-screenshot.png".format(output_path)
-        if path.isfile(fname):
-            return fname
-
-        return False
-
     def visualselector_data_is_ready(self, watch_uuid):
         output_path = "{}/{}".format(self.datastore_path, watch_uuid)
         screenshot_filename = "{}/last-screenshot.png".format(output_path)
@@ -354,17 +340,34 @@ class ChangeDetectionStore:
         return False
 
     # Save as PNG, PNG is larger but better for doing visual diff in the future
-    def save_screenshot(self, watch_uuid, screenshot: bytes):
+    def save_screenshot(self, watch_uuid, screenshot: bytes, as_error=False):
-        output_path = "{}/{}".format(self.datastore_path, watch_uuid)
+
-        fname = "{}/last-screenshot.png".format(output_path)
+        if as_error:
-        with open(fname, 'wb') as f:
+            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_xpath_data(self, watch_uuid, data):
+    def save_error_text(self, watch_uuid, contents):
-        output_path = "{}/{}".format(self.datastore_path, watch_uuid)
+
-        fname = "{}/elements.json".format(output_path)
+        target_path = os.path.join(self.datastore_path, watch_uuid, "last-error.txt")
-        with open(fname, 'w') as f:
+
+        with open(target_path, 'w') as f:
+            f.write(contents)
+
+    def save_xpath_data(self, watch_uuid, data, as_error=False):
+
+        if as_error:
+            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))
             f.close()
 
@@ -521,8 +524,15 @@ class ChangeDetectionStore:
 
     # We incorrectly stored last_changed when there was not a change, and then confused the output list table
     def update_3(self):
+        # see https://github.com/dgtlmoon/changedetection.io/pull/835
+        return
+
+    # `last_changed` not needed, we pull that information from the history.txt index
+    def update_4(self):
         for uuid, watch in self.data['watching'].items():
-            # Be sure it's recalculated
+            try:
-            p = watch.history
+                # Remove it from the struct
-            if watch.history_n < 2:
+                del(watch['last_changed'])
-                watch['last_changed'] = 0
+            except:
+                continue
+        return

changedetectionio/templates/_pagination.jinja

@@ -0,0 +1,7 @@
+{% macro pagination(sorted_watches, total_per_page, current_page) %}
+  {{ sorted_watches|length }}
+
+  {% for row in sorted_watches|batch(total_per_page, ' ') %}
+    {{ loop.index}}
+  {% endfor %}
+{% endmacro %}

changedetectionio/templates/diff.html

@@ -3,6 +3,9 @@
 {% block content %}
 <script>
     const screenshot_url="{{url_for('static_content', group='screenshot', filename=uuid)}}";
+    {% if last_error_screenshot %}
+    const error_screenshot_url="{{url_for('static_content', group='screenshot', filename=uuid, error_screenshot=1) }}";
+    {% endif %}
 </script>
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='diff-overview.js')}}" defer></script>
 
@@ -43,15 +46,31 @@
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <div class="tabs">
     <ul>
-        <li class="tab" id="default-tab"><a href="#text">Text</a></li>
+        {% if last_error_text %}<li class="tab" id="error-text-tab"><a href="#error-text">Error Text</a></li> {% endif %}
+        {% if last_error_screenshot %}<li class="tab" id="error-screenshot-tab"><a href="#error-screenshot">Error Screenshot</a></li> {% endif %}
+        <li class="tab" id=""><a href="#text">Text</a></li>
         <li class="tab" id="screenshot-tab"><a href="#screenshot">Screenshot</a></li>
     </ul>
 </div>
 
 <div id="diff-ui">
+    <div class="tab-pane-inner" id="error-text">
+        <div class="snapshot-age error">{{watch_a.error_text_ctime|format_seconds_ago}} seconds ago</div>
+        <pre>
+            {{ last_error_text }}
+        </pre>
+    </div>
+
+    <div class="tab-pane-inner" id="error-screenshot">
+        <div class="snapshot-age error">{{watch_a.snapshot_error_screenshot_ctime|format_seconds_ago}} seconds ago</div>
+        <img id="error-screenshot-img"  style="max-width: 80%" alt="Current error-ing screenshot from most recent request"/>
+    </div>
+
      <div class="tab-pane-inner" id="text">
          <div class="tip">Pro-tip: Use <strong>show current snapshot</strong> tab to visualise what will be ignored.
          </div>
+         <div class="snapshot-age">{{watch_a.snapshot_text_ctime|format_timestamp_timeago}}</div>
+
          <table>
              <tbody>
              <tr>
@@ -70,10 +89,10 @@
          <div class="tip">
              For now, Differences are performed on text, not graphically, only the latest screenshot is available.
          </div>
-         </br>
          {% if is_html_webdriver %}
            {% if screenshot %}
-             <img style="max-width: 80%" id="screenshot-img" alt="Current screenshot from most recent request"/>
+            <div class="snapshot-age">{{watch_a.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.
            {% endif %}
@@ -88,7 +107,6 @@
 
 <script defer="">
 
-
 var a = document.getElementById('a');
 var b = document.getElementById('b');
 var result = document.getElementById('result');

changedetectionio/templates/edit.html

@@ -23,7 +23,7 @@
 
     <div class="tabs collapsable">
         <ul>
-            <li class="tab" id="default-tab"><a href="#general">General</a></li>
+            <li class="tab" id=""><a href="#general">General</a></li>
             <li class="tab"><a href="#request">Request</a></li>
             <li class="tab"><a id="visualselector-tab" href="#visualselector">Visual Filter Selector</a></li>
             <li class="tab"><a href="#filters-and-triggers">Filters &amp; Triggers</a></li>
@@ -33,7 +33,7 @@
 
     <div class="box-wrap inner">
         <form class="pure-form pure-form-stacked"
-              action="{{ url_for('edit_page', uuid=uuid, next = request.args.get('next') ) }}" method="POST">
+              action="{{ url_for('edit_page', uuid=uuid, next = request.args.get('next'), unpause_on_save = request.args.get('unpause_on_save')) }}" method="POST">
              <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
 
             <div class="tab-pane-inner" id="general">
@@ -87,6 +87,9 @@
                         </span>
                     </div>
                 {% endif %}
+                    <div  class="pure-control-group inline-radio">
+                        {{ render_checkbox_field(form.ignore_status_codes) }}
+                    </div>
                 <fieldset id="webdriver-override-options">
                     <div class="pure-control-group">
                         {{ render_field(form.webdriver_delay) }}
@@ -128,11 +131,7 @@ User-Agent: wonderbra 1.0") }}
    \"car\":null
 }") }}
                     </div>
-                    <div id="ignore-status-codes-option">
-                        {{ render_checkbox_field(form.ignore_status_codes) }}
-                    </div>
                 </fieldset>
-                <br/>
             </div>
 
             <div class="tab-pane-inner" id="notifications">
@@ -163,15 +162,26 @@ User-Agent: wonderbra 1.0") }}
                         </div>
                     </fieldset>
                     <div class="pure-control-group">
-                        {{ render_field(form.css_filter, placeholder=".class-name or #some-id, or other CSS selector rule.",
+                        {% set field = render_field(form.css_filter,
-                        class="m-d") }}
+                            placeholder=".class-name or #some-id, or other CSS selector rule.",
+                            class="m-d")
+                        %}
+                        {{ field }}
+                        {% if '/text()' in  field %}
+                          <span class="pure-form-message-inline"><strong>Note!: //text() function does not work where the &lt;element&gt; contains &lt;![CDATA[]]&gt;</strong></span><br/>
+                        {% endif %}
                         <span class="pure-form-message-inline">
                     <ul>
                         <li>CSS - Limit text to this CSS rule, only text matching this CSS rule is included.</li>
                         <li>JSON - Limit text to this JSON rule, using <a href="https://pypi.org/project/jsonpath-ng/">JSONPath</a>, prefix with <code>"json:"</code>, use <code>json:$</code> to force re-formatting if required,  <a
                                 href="https://jsonpath.com/" target="new">test your JSONPath here</a></li>
-                        <li>XPath - Limit text to this XPath rule, simply start with a forward-slash, example  <code>//*[contains(@class, 'sametext')]</code> or <code>xpath://*[contains(@class, 'sametext')]</code>, <a
+                        <li>XPath - Limit text to this XPath rule, simply start with a forward-slash,
+                            <ul>
+                                <li>Example:  <code>//*[contains(@class, 'sametext')]</code> or <code>xpath://*[contains(@class, 'sametext')]</code>, <a
                                 href="http://xpather.com/" target="new">test your XPath here</a></li>
+                                <li>Example: Get all titles from an RSS feed <code>//title/text()</code></li>
+                            </ul>
+                            </li>
                     </ul>
                     Please be sure that you thoroughly understand how to write CSS or JSONPath, XPath selector rules before filing an issue on GitHub! <a
                                 href="https://github.com/dgtlmoon/changedetection.io/wiki/CSS-Selector-help">here for more CSS selector help</a>.<br/>
@@ -296,9 +306,7 @@ Unavailable") }}
 
             <div id="actions">
                 <div class="pure-control-group">
-
+                    {{ render_button(form.save_button) }}
-                      {{ render_button(form.save_button) }} {{ render_button(form.save_and_preview_button) }}
-
                     <a href="{{url_for('form_delete', uuid=uuid)}}"
                        class="pure-button button-small button-error ">Delete</a>
                     <a href="{{url_for('clear_watch_history', uuid=uuid)}}"

changedetectionio/templates/import.html

@@ -5,7 +5,7 @@
 
     <div class="tabs collapsable">
         <ul>
-            <li class="tab" id="default-tab"><a href="#url-list">URL List</a></li>
+            <li class="tab" id=""><a href="#url-list">URL List</a></li>
             <li class="tab"><a href="#distill-io">Distill.io</a></li>
         </ul>
     </div>

changedetectionio/templates/preview.html

@@ -3,23 +3,39 @@
 {% block content %}
 <script>
     const screenshot_url="{{url_for('static_content', group='screenshot', filename=uuid)}}";
+    {% if last_error_screenshot %}
+    const error_screenshot_url="{{url_for('static_content', group='screenshot', filename=uuid, error_screenshot=1) }}";
+    {% endif %}
 </script>
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='diff-overview.js')}}" defer></script>
 
-<div id="settings">
-    <h1>Current - {{watch.last_checked|format_timestamp_timeago}}</h1>
-</div>
-
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='tabs.js')}}" defer></script>
 <div class="tabs">
     <ul>
-        <li class="tab" id="default-tab"><a href="#text">Text</a></li>
+        {% if last_error_text %}<li class="tab" id="error-text-tab"><a href="#error-text">Error Text</a></li> {% endif %}
+        {% if last_error_screenshot %}<li class="tab" id="error-screenshot-tab"><a href="#error-screenshot">Error Screenshot</a></li> {% endif %}
+        {% if history_n > 0 %}
+        <li class="tab" id="text-tab"><a href="#text">Text</a></li>
         <li class="tab" id="screenshot-tab"><a href="#screenshot">Screenshot</a></li>
+        {% endif %}
     </ul>
 </div>
 
 <div id="diff-ui">
+    <div class="tab-pane-inner" id="error-text">
+        <div class="snapshot-age error">{{watch.error_text_ctime|format_seconds_ago}} seconds ago</div>
+        <pre>
+            {{ last_error_text }}
+        </pre>
+    </div>
+
+    <div class="tab-pane-inner" id="error-screenshot">
+        <div class="snapshot-age error">{{watch.snapshot_error_screenshot_ctime|format_seconds_ago}} seconds ago</div>
+        <img id="error-screenshot-img"  style="max-width: 80%" alt="Current erroring screenshot from most recent request"/>
+    </div>
+
     <div class="tab-pane-inner" id="text">
+        <div class="snapshot-age">{{watch.snapshot_text_ctime|format_timestamp_timeago}}</div>
         <span class="ignored">Grey lines are ignored</span> <span class="triggered">Blue lines are triggers</span>
         <table>
             <tbody>
@@ -33,6 +49,7 @@
             </tbody>
         </table>
     </div>
+
      <div class="tab-pane-inner" id="screenshot">
          <div class="tip">
              For now, Differences are performed on text, not graphically, only the latest screenshot is available.

changedetectionio/templates/settings.html

@@ -16,7 +16,7 @@
 <div class="edit-form">
     <div class="tabs collapsable">
         <ul>
-            <li class="tab" id="default-tab"><a href="#general">General</a></li>
+            <li class="tab" id=""><a href="#general">General</a></li>
             <li class="tab"><a href="#notifications">Notifications</a></li>
             <li class="tab"><a href="#fetching">Fetching</a></li>
             <li class="tab"><a href="#filters">Global Filters</a></li>
@@ -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

@@ -1,18 +1,26 @@
 {% extends 'base.html' %}
 {% block content %}
-{% from '_helpers.jinja' import render_simple_field %}
+{% from '_helpers.jinja' import render_simple_field, render_field %}
+{% from '_pagination.jinja' import pagination %}
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='jquery-3.6.0.min.js')}}"></script>
 <script type="text/javascript" src="{{url_for('static_content', group='js', filename='watch-overview.js')}}" defer></script>
 
 <div class="box">
 
-    <form class="pure-form" action="{{ url_for('form_watch_add') }}" method="POST" id="new-watch-form">
+    <form class="pure-form" action="{{ url_for('form_quick_watch_add') }}" method="POST" id="new-watch-form">
         <input type="hidden" name="csrf_token" value="{{ csrf_token() }}"/>
         <fieldset>
             <legend>Add a new change detection watch</legend>
-                {{ render_simple_field(form.url, placeholder="https://...", required=true) }}
+            <div id="watch-add-wrapper-zone">
-                {{ render_simple_field(form.tag, value=active_tag if active_tag else '', placeholder="watch group") }}
+                <div>
-            <button type="submit" class="pure-button pure-button-primary">Watch</button>
+                    {{ render_simple_field(form.url, placeholder="https://...", required=true) }}
+                    {{ render_simple_field(form.tag, value=active_tag if active_tag else '', placeholder="watch group") }}
+                </div>
+                <div>
+                    {{ render_simple_field(form.watch_submit_button, title="Watch this URL!" ) }}
+                    {{ render_simple_field(form.edit_and_watch_submit_button, title="Edit first then Watch") }}
+                </div>
+            </div>
         </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>
@@ -25,22 +33,32 @@
         {% endfor %}
     </div>
 
+    {% set sort_order = request.args.get('order', 'asc') == 'asc' %}
+    {% set sort_attribute = request.args.get('sort', 'last_changed')   %}
+    {% set pagination_page = request.args.get('page', 0) %}
+
     <div id="watch-table-wrapper">
         <table class="pure-table pure-table-striped watch-table">
             <thead>
             <tr>
                 <th>#</th>
                 <th></th>
-                <th></th>
+                {% set link_order = "desc" if sort_order else "asc" %}
-                <th>Last Checked</th>
+                {% set arrow_span = "" %}
-                <th>Last Changed</th>
+                <th><a class="{{ 'active '+link_order if sort_attribute == 'label' else 'inactive' }}" href="{{url_for('index', sort='label', order=link_order)}}">Website <span class='arrow {{link_order}}'></span></a></th>
+                <th><a class="{{ 'active '+link_order if sort_attribute == 'last_checked' else 'inactive' }}" href="{{url_for('index', sort='last_checked', order=link_order)}}">Last Checked <span class='arrow {{link_order}}'></span></a></th>
+                <th><a class="{{ 'active '+link_order if sort_attribute == 'last_changed' else 'inactive' }}" href="{{url_for('index', sort='last_changed', order=link_order)}}">Last Changed <span class='arrow {{link_order}}'></span></a></th>
                 <th></th>
             </tr>
             </thead>
             <tbody>
 
+            {% set sorted_watches = watches|sort(attribute=sort_attribute, reverse=sort_order) %}
+            {% for watch in sorted_watches %}
 
-            {% for watch in watches|sort(attribute='last_changed', reverse=True) %}
+            {# WIP for pagination, disabled for now
+              {% if not ( loop.index >= 3 and loop.index <=4) %}{% continue %}{% endif %} -->
+             #}
             <tr id="{{ watch.uuid }}"
                 class="{{ loop.cycle('pure-table-odd', 'pure-table-even') }}
                 {% if watch.last_error is defined and watch.last_error != False %}error{% endif %}
@@ -49,8 +67,10 @@
                 {% 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 paused-state state-{{watch.paused}}"><a href="{{url_for('index', pause=watch.uuid, tag=active_tag)}}"><img src="{{url_for('static_content', group='images', filename='pause.svg')}}" alt="Pause" title="Pause"/></a></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>
+                </td>
                 <td class="title-col inline">{{watch.title if watch.title is not none and watch.title|length > 0 else watch.url}}
                     <a class="external" target="_blank" rel="noopener" href="{{ watch.url.replace('source:','') }}"></a>
                     <a href="{{url_for('form_share_put_watch', uuid=watch.uuid)}}"><img style="height: 1em;display:inline-block;" src="{{url_for('static_content', group='images', filename='spread.svg')}}" /></a>
@@ -81,7 +101,7 @@
                     {% if watch.history_n >= 2 %}
                     <a href="{{ url_for('diff_history_page', uuid=watch.uuid) }}" target="{{watch.uuid}}" class="pure-button button-small pure-button-primary diff-link">Diff</a>
                     {% else %}
-                        {% if watch.history_n == 1 %}
+                        {% if watch.history_n == 1 or (watch.history_n ==0 and watch.error_text_ctime )%}
                             <a href="{{ url_for('preview_page', uuid=watch.uuid)}}" target="{{watch.uuid}}" class="pure-button button-small pure-button-primary">Preview</a>
                         {% endif %}
                     {% endif %}
@@ -104,6 +124,10 @@
                 <a href="{{ url_for('rss', tag=active_tag , token=app_rss_token)}}"><img alt="RSS Feed" id="feed-icon" src="{{url_for('static_content', group='images', filename='Generic_Feed-icon.svg')}}" height="15"></a>
             </li>
         </ul>
+        {# WIP for pagination, disabled for now
+         {{ pagination(sorted_watches,3, pagination_page) }}
+         #}
+
     </div>
 </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:
+    wait_for_all_checks(client)
-        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
 
 
     res = client.get(

changedetectionio/tests/test_access_control.py

@@ -19,7 +19,6 @@ def test_check_access_control(app, client):
         )
 
         assert b"Password protection enabled." in res.data
-        assert b"LOG OUT" not in res.data
 
         # Check we hit the login
         res = c.get(url_for("index"), follow_redirects=True)
@@ -38,7 +37,40 @@ def test_check_access_control(app, client):
             follow_redirects=True
         )
 
+        # Yes we are correctly logged in
         assert b"LOG OUT" in res.data
+
+        # 598 - Password should be set and not accidently removed
+        res = c.post(
+            url_for("settings_page"),
+            data={
+                  "requests-time_between_check-minutes": 180,
+                  'application-fetch_backend': "html_requests"},
+            follow_redirects=True
+        )
+
+        res = c.get(url_for("logout"),
+            follow_redirects=True)
+
+        res = c.get(url_for("settings_page"),
+            follow_redirects=True)
+
+
+        assert b"Login" in res.data
+
+        res = c.get(url_for("login"))
+        assert b"Login" in res.data
+
+
+        res = c.post(
+            url_for("login"),
+            data={"password": "foobar"},
+            follow_redirects=True
+        )
+
+        # Yes we are correctly logged in
+        assert b"LOG OUT" in res.data
+
         res = c.get(url_for("settings_page"))
 
         # Menu should be available now

changedetectionio/tests/test_backend.py

@@ -90,6 +90,14 @@ def test_check_basic_change_detection_functionality(client, live_server):
     res = client.get(url_for("diff_history_page", uuid="first"))
     assert b'Compare newest' in res.data
 
+    # Check the [preview] pulls the right one
+    res = client.get(
+        url_for("preview_page", uuid="first"),
+        follow_redirects=True
+    )
+    assert b'which has this one new line' in res.data
+    assert b'Which is across multiple lines' not in res.data
+
     time.sleep(2)
 
     # Do this a few times.. ensures we dont accidently set the status

changedetectionio/tests/test_errorhandling.py

@@ -11,16 +11,17 @@ def test_setup(live_server):
     live_server_setup(live_server)
 
 
-def test_error_handler(client, live_server):
+def _runner_test_http_errors(client, live_server, http_code, expected_text):
 
+    with open("test-datastore/endpoint-content.txt", "w") as f:
+        f.write("Now you going to get a {} error code\n".format(http_code))
 
-    # Give the endpoint time to spin up
-    time.sleep(1)
 
     # Add our URL to the import page
     test_url = url_for('test_endpoint',
-                       status_code=403,
+                       status_code=http_code,
                        _external=True)
+
     res = client.post(
         url_for("import_page"),
         data={"urls": test_url},
@@ -28,20 +29,39 @@ def test_error_handler(client, live_server):
     )
     assert b"1 Imported" in res.data
 
-    # Trigger a check
-    client.get(url_for("form_watch_checknow"), follow_redirects=True)
-
     # Give the thread time to pick it up
-    time.sleep(3)
+    time.sleep(2)
-
 
     res = client.get(url_for("index"))
+    # no change
     assert b'unviewed' not in res.data
-    assert b'Status Code 403' in res.data
+    assert bytes(expected_text.encode('utf-8')) in res.data
-    assert bytes("just now".encode('utf-8')) in res.data
+
+
+    # Error viewing tabs should appear
+    res = client.get(
+        url_for("preview_page", uuid="first"),
+        follow_redirects=True
+    )
+
+    assert b'Error Text' in res.data
+
+    # 'Error Screenshot' only when in playwright mode
+    #assert b'Error Screenshot' in res.data
+
+
+    res = client.get(url_for("form_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data
+
+
+def test_http_error_handler(client, live_server):
+    _runner_test_http_errors(client, live_server, 403, 'Access denied')
+    _runner_test_http_errors(client, live_server, 404, 'Page not found')
+    _runner_test_http_errors(client, live_server, 500, '(Internal server Error) received')
+    _runner_test_http_errors(client, live_server, 400, 'Error - Request returned a HTTP error code 400')
 
 # Just to be sure error text is properly handled
-def test_error_text_handler(client, live_server):
+def test_DNS_errors(client, live_server):
     # Give the endpoint time to spin up
     time.sleep(1)
 
@@ -53,13 +73,11 @@ def test_error_text_handler(client, live_server):
     )
     assert b"1 Imported" in res.data
 
-    # Trigger a check
-    client.get(url_for("form_watch_checknow"), follow_redirects=True)
-
     # Give the thread time to pick it up
     time.sleep(3)
 
     res = client.get(url_for("index"))
     assert b'Name or service not known' in res.data
+    # Should always record that we tried
     assert bytes("just now".encode('utf-8')) in res.data
 

changedetectionio/tests/test_filter_exist_changes.py

@@ -0,0 +1,134 @@
+#!/usr/bin/python3
+
+# https://www.reddit.com/r/selfhosted/comments/wa89kp/comment/ii3a4g7/?context=3
+import os
+import time
+from flask import url_for
+from .util import set_original_response, live_server_setup
+from changedetectionio.model import App
+
+
+def set_response_without_filter():
+    test_return_data = """<html>
+       <body>
+     Some initial text</br>
+     <p>Which is across multiple lines</p>
+     </br>
+     So let's see what happens.  </br>
+     <div id="nope-doesnt-exist">Some text thats the same</div>     
+     </body>
+     </html>
+    """
+
+    with open("test-datastore/endpoint-content.txt", "w") as f:
+        f.write(test_return_data)
+    return None
+
+
+def set_response_with_filter():
+    test_return_data = """<html>
+       <body>
+     Some initial text</br>
+     <p>Which is across multiple lines</p>
+     </br>
+     So let's see what happens.  </br>
+     <div class="ticket-available">Ticket now on sale!</div>     
+     </body>
+     </html>
+    """
+
+    with open("test-datastore/endpoint-content.txt", "w") as f:
+        f.write(test_return_data)
+    return None
+
+def test_filter_doesnt_exist_then_exists_should_get_notification(client, live_server):
+#  Filter knowingly doesn't exist, like someone setting up a known filter to see if some cinema tickets are on sale again
+#  And the page has that filter available
+#  Then I should get a notification
+
+    live_server_setup(live_server)
+
+    # Give the endpoint time to spin up
+    time.sleep(1)
+    set_response_without_filter()
+
+    # Add our URL to the import page
+    test_url = url_for('test_endpoint', _external=True)
+    res = client.post(
+        url_for("form_quick_watch_add"),
+        data={"url": test_url, "tag": 'cinema'},
+        follow_redirects=True
+    )
+    assert b"Watch added" in res.data
+
+    # Give the thread time to pick up the first version
+    time.sleep(3)
+
+    # Goto the edit page, add our ignore text
+    # Add our URL to the import page
+    url = url_for('test_notification_endpoint', _external=True)
+    notification_url = url.replace('http', 'json')
+
+    print(">>>> Notification URL: " + notification_url)
+
+    # Just a regular notification setting, this will be used by the special 'filter not found' notification
+    notification_form_data = {"notification_urls": notification_url,
+                              "notification_title": "New ChangeDetection.io Notification - {watch_url}",
+                              "notification_body": "BASE URL: {base_url}\n"
+                                                   "Watch URL: {watch_url}\n"
+                                                   "Watch UUID: {watch_uuid}\n"
+                                                   "Watch title: {watch_title}\n"
+                                                   "Watch tag: {watch_tag}\n"
+                                                   "Preview: {preview_url}\n"
+                                                   "Diff URL: {diff_url}\n"
+                                                   "Snapshot: {current_snapshot}\n"
+                                                   "Diff: {diff}\n"
+                                                   "Diff Full: {diff_full}\n"
+                                                   ":-)",
+                              "notification_format": "Text"}
+
+    notification_form_data.update({
+        "url": test_url,
+        "tag": "my tag",
+        "title": "my title",
+        "headers": "",
+        "css_filter": '.ticket-available',
+        "fetch_backend": "html_requests"})
+
+    res = client.post(
+        url_for("edit_page", uuid="first"),
+        data=notification_form_data,
+        follow_redirects=True
+    )
+    assert b"Updated watch." in res.data
+    time.sleep(3)
+
+    # Shouldn't exist, shouldn't have fired
+    assert not os.path.isfile("test-datastore/notification.txt")
+    # Now the filter should exist
+    set_response_with_filter()
+    client.get(url_for("form_watch_checknow"), follow_redirects=True)
+    time.sleep(3)
+
+    assert os.path.isfile("test-datastore/notification.txt")
+
+    with open("test-datastore/notification.txt", 'r') as f:
+        notification = f.read()
+
+    assert 'Ticket now on sale' in notification
+    os.unlink("test-datastore/notification.txt")
+
+
+    # Test that if it gets removed, then re-added, we get a notification
+    # Remove the target and re-add it, we should get a new notification
+    set_response_without_filter()
+    client.get(url_for("form_watch_checknow"), follow_redirects=True)
+    time.sleep(3)
+    assert not os.path.isfile("test-datastore/notification.txt")
+
+    set_response_with_filter()
+    client.get(url_for("form_watch_checknow"), follow_redirects=True)
+    time.sleep(3)
+    assert os.path.isfile("test-datastore/notification.txt")
+
+# Also test that the filter was updated after the first one was requested

changedetectionio/tests/test_filter_failure_notification.py

@@ -26,14 +26,22 @@ def run_filter_test(client, content_filter):
 
     # Give the endpoint time to spin up
     time.sleep(1)
+    # cleanup for the next
+    client.get(
+        url_for("form_delete", uuid="all"),
+        follow_redirects=True
+    )
+    if os.path.isfile("test-datastore/notification.txt"):
+        os.unlink("test-datastore/notification.txt")
 
     # Add our URL to the import page
     test_url = url_for('test_endpoint', _external=True)
     res = client.post(
-        url_for("form_watch_add"),
+        url_for("form_quick_watch_add"),
         data={"url": test_url, "tag": ''},
         follow_redirects=True
     )
+
     assert b"Watch added" in res.data
 
     # Give the thread time to pick up the first version
@@ -67,6 +75,7 @@ def run_filter_test(client, content_filter):
         "tag": "my tag",
         "title": "my title",
         "headers": "",
+        "filter_failure_notification_send": 'y',
         "css_filter": content_filter,
         "fetch_backend": "html_requests"})
 
@@ -86,7 +95,7 @@ def run_filter_test(client, content_filter):
         time.sleep(3)
 
     # We should see something in the frontend
-    assert b'Did the page change its layout' in res.data
+    assert b'Warning, filter' in res.data
 
     # Now it should exist and contain our "filter not found" alert
     assert os.path.isfile("test-datastore/notification.txt")
@@ -132,3 +141,4 @@ def test_check_xpath_filter_failure_notification(client, live_server):
     time.sleep(1)
     run_filter_test(client, '//*[@id="nope-doesnt-exist"]')
 
+# Test that notification is never sent

changedetectionio/tests/test_ignorestatuscode.py

@@ -137,54 +137,3 @@ def test_403_page_check_works_with_ignore_status_code(client, live_server):
     res = client.get(url_for("index"))
     assert b'unviewed' in res.data
 
-
-# Tests the whole stack works with staus codes ignored
-def test_403_page_check_fails_without_ignore_status_code(client, live_server):
-    sleep_time_for_fetch_thread = 3
-
-    set_original_response()
-
-    # Give the endpoint time to spin up
-    time.sleep(1)
-
-    # Add our URL to the import page
-    test_url = url_for('test_endpoint', status_code=403, _external=True)
-    res = client.post(
-        url_for("import_page"),
-        data={"urls": test_url},
-        follow_redirects=True
-    )
-    assert b"1 Imported" in res.data
-
-    # Trigger a check
-    client.get(url_for("form_watch_checknow"), follow_redirects=True)
-
-    # Give the thread time to pick it up
-    time.sleep(sleep_time_for_fetch_thread)
-
-    # Goto the edit page, check our ignore option
-    # Add our URL to the import page
-    res = client.post(
-        url_for("edit_page", uuid="first"),
-        data={"url": test_url, "tag": "", "headers": "", 'fetch_backend': "html_requests"},
-        follow_redirects=True
-    )
-    assert b"Updated watch." in res.data
-
-    # Trigger a check
-    client.get(url_for("form_watch_checknow"), follow_redirects=True)
-
-    # Give the thread time to pick it up
-    time.sleep(sleep_time_for_fetch_thread)
-    #  Make a change
-    set_some_changed_response()
-
-    # Trigger a check
-    client.get(url_for("form_watch_checknow"), follow_redirects=True)
-    # Give the thread time to pick it up
-    time.sleep(sleep_time_for_fetch_thread)
-
-    # It should have 'unviewed' still
-    # Because it should be looking at only that 'sametext' id
-    res = client.get(url_for("index"))
-    assert b'Status Code 403' in res.data

changedetectionio/tests/test_notification.py

@@ -36,7 +36,7 @@ def test_check_notification(client, live_server):
     # Add our URL to the import page
     test_url = url_for('test_endpoint', _external=True)
     res = client.post(
-        url_for("form_watch_add"),
+        url_for("form_quick_watch_add"),
         data={"url": test_url, "tag": ''},
         follow_redirects=True
     )
@@ -172,7 +172,7 @@ def test_notification_validation(client, live_server):
     # Add our URL to the import page
     test_url = url_for('test_endpoint', _external=True)
     res = client.post(
-        url_for("form_watch_add"),
+        url_for("form_quick_watch_add"),
         data={"url": test_url, "tag": 'nice one'},
         follow_redirects=True
     )

changedetectionio/tests/test_notification_errors.py

@@ -16,7 +16,7 @@ def test_check_notification_error_handling(client, live_server):
     # use a different URL so that it doesnt interfere with the actual check until we are ready
     test_url = url_for('test_endpoint', _external=True)
     res = client.post(
-        url_for("form_watch_add"),
+        url_for("form_quick_watch_add"),
         data={"url": "https://changedetection.io/CHANGELOG.txt", "tag": ''},
         follow_redirects=True
     )

changedetectionio/tests/test_xpath_selector.py

@@ -86,6 +86,7 @@ def test_check_xpath_filter_utf8(client, live_server):
         follow_redirects=True
     )
     assert b"1 Imported" in res.data
+    time.sleep(1)
     res = client.post(
         url_for("edit_page", uuid="first"),
         data={"css_filter": filter, "url": test_url, "tag": "", "headers": "", 'fetch_backend': "html_requests"},
@@ -99,6 +100,68 @@ def test_check_xpath_filter_utf8(client, live_server):
     assert b'Deleted' in res.data
 
 
+# Handle utf-8 charset replies https://github.com/dgtlmoon/changedetection.io/pull/613
+def test_check_xpath_text_function_utf8(client, live_server):
+    filter='//item/title/text()'
+
+    d='''<?xml version="1.0" encoding="UTF-8"?>
+<rss xmlns:taxo="http://purl.org/rss/1.0/modules/taxonomy/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:dc="http://purl.org/dc/elements/1.1/" version="2.0">
+	<channel>
+		<title>rpilocator.com</title>
+		<link>https://rpilocator.com</link>
+		<description>Find Raspberry Pi Computers in Stock</description>
+		<lastBuildDate>Thu, 19 May 2022 23:27:30 GMT</lastBuildDate>
+		<image>
+			<url>https://rpilocator.com/favicon.png</url>
+			<title>rpilocator.com</title>
+			<link>https://rpilocator.com/</link>
+			<width>32</width>
+			<height>32</height>
+		</image>
+		<item>
+			<title>Stock Alert (UK): RPi CM4</title>
+			<foo>something else unrelated</foo>
+		</item>
+		<item>
+			<title>Stock Alert (UK): Big monitor</title>
+			<foo>something else unrelated</foo>
+		</item>		
+	</channel>
+</rss>'''
+
+    with open("test-datastore/endpoint-content.txt", "w") as f:
+        f.write(d)
+
+    # Add our URL to the import page
+    test_url = url_for('test_endpoint', _external=True, content_type="application/rss+xml;charset=UTF-8")
+    res = client.post(
+        url_for("import_page"),
+        data={"urls": test_url},
+        follow_redirects=True
+    )
+    assert b"1 Imported" in res.data
+    time.sleep(1)
+    res = client.post(
+        url_for("edit_page", uuid="first"),
+        data={"css_filter": filter, "url": test_url, "tag": "", "headers": "", 'fetch_backend': "html_requests"},
+        follow_redirects=True
+    )
+    assert b"Updated watch." in res.data
+    time.sleep(3)
+    res = client.get(url_for("index"))
+    assert b'Unicode strings with encoding declaration are not supported.' not in res.data
+
+    # The service should echo back the request headers
+    res = client.get(
+        url_for("preview_page", uuid="first"),
+        follow_redirects=True
+    )
+
+    assert b'<div class="">Stock Alert (UK): RPi CM4' in res.data
+    assert b'<div class="">Stock Alert (UK): Big monitor' in res.data
+
+    res = client.get(url_for("form_delete", uuid="all"), follow_redirects=True)
+    assert b'Deleted' in res.data
 
 def test_check_markup_xpath_filter_restriction(client, live_server):
     sleep_time_for_fetch_thread = 3

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

@@ -1,3 +1,4 @@
+import os
 import threading
 import queue
 import time
@@ -7,25 +8,84 @@ from changedetectionio.html_tools import FilterNotFoundInResponse
 
 # 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, uuid, *args, **kwargs):
+    def __init__(self, q, notification_q, app, datastore, *args, **kwargs):
         self.q = q
-
         self.app = app
         self.notification_q = notification_q
         self.datastore = datastore
-        self.current_uuid = uuid
         super().__init__(*args, **kwargs)
-        self.name = "update_worker"
 
-    def send_filter_failure_notification(self, uuid):
+    def send_content_changed_notification(self, t, watch_uuid):
+
+        from changedetectionio import diff
+
+        n_object = {}
+        watch = self.datastore.data['watching'].get(watch_uuid, False)
+        if not watch:
+            return
+
+        watch_history = watch.history
+        dates = list(watch_history.keys())
+        # Theoretically it's possible that this could be just 1 long,
+        # - In the case that the timestamp key was not unique
+        if len(dates) == 1:
+            raise ValueError(
+                "History index had 2 or more, but only 1 date loaded, timestamps were not unique? maybe two of the same timestamps got written, needs more delay?"
+            )
+
+        # Did it have any notification alerts to hit?
+        if len(watch['notification_urls']):
+            print(">>> Notifications queued for UUID from watch {}".format(watch_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(watch_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"
+
+            snapshot_contents = ''
+            with open(watch_history[dates[-1]], 'rb') as f:
+                snapshot_contents = f.read()
+
+            n_object.update({
+                'watch_url': watch['url'],
+                'uuid': watch_uuid,
+                'current_snapshot': snapshot_contents.decode('utf-8'),
+                'diff': diff.render_diff(watch_history[dates[-2]], watch_history[dates[-1]], line_feed_sep=line_feed_sep),
+                'diff_full': diff.render_diff(watch_history[dates[-2]], watch_history[dates[-1]], True, line_feed_sep=line_feed_sep)
+            })
+
+            self.notification_q.put(n_object)
+
+    def send_filter_failure_notification(self, watch_uuid):
 
         threshold = self.datastore.data['settings']['application'].get('filter_failure_notification_threshold_attempts')
-        watch = self.datastore.data['watching'].get(uuid, False)
+        watch = self.datastore.data['watching'].get(watch_uuid, False)
+        if not watch:
+            return
 
         n_object = {'notification_title': 'Changedetection.io - Alert - CSS/xPath filter was not present in the page',
                     'notification_body': "Your configured CSS/xPath filter of '{}' for {{watch_url}} did not appear on the page after {} attempts, did the page change layout?\n\nLink: {{base_url}}/edit/{{watch_uuid}}\n\nThanks - Your omniscient changedetection.io installation :)\n".format(
@@ -43,175 +103,194 @@ class update_worker(threading.Thread):
         if 'notification_urls' in n_object:
             n_object.update({
                 'watch_url': watch['url'],
-                'uuid': uuid
+                'uuid': watch_uuid
             })
             self.notification_q.put(n_object)
-            print("Sent filter not found notification for {}".format(uuid))
+            print("Sent filter not found notification for {}".format(watch_uuid))
+
+    def cleanup_error_artifacts(self, uuid):
+        # All went fine, remove error artifacts
+        cleanup_files = ["last-error-screenshot.png", "last-error.txt"]
+        for f in cleanup_files:
+            full_path = os.path.join(self.datastore.datastore_path, uuid, f)
+            if os.path.isfile(full_path):
+                os.unlink(full_path)
 
-    # Pick one job off the list, process it threaded, exist
     def run(self):
-        # Go talk to the website
-        self.perform_site_update()
-
-        self.current_uuid = None  # Done
-        self.q.task_done()
-
-        # Let the thread die after processing 1
-        # We will launch nice juicy fresh threads every time to prevent memory leaks in complex runner code (playwright etc)
-        print ("EXITING THREAD!")
-        self.app.config.exit.wait(1)
-        return
-
-
-
-    def perform_site_update(self):
-
         from changedetectionio import fetch_site_status
 
-        if not self.current_uuid in list(self.datastore.data['watching'].keys()):
-            return
-
-
-        changed_detected = False
-        contents = ""
-        screenshot = False
-        update_obj= {}
-        xpath_data = False
-        now = time.time()
-
         update_handler = fetch_site_status.perform_site_check(datastore=self.datastore)
-        try:
-            changed_detected, update_obj, contents, screenshot, xpath_data = update_handler.run(self.current_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", self.current_uuid, str(e))
-        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
-            self.datastore.update_watch(uuid=self.current_uuid, update_obj={'last_error': "Got HTML content but no text found."})
-        except FilterNotFoundInResponse as e:
-            err_text = "Filter '{}' not found - Did the page change its layout?".format(str(e))
-            c = 0
-            if self.datastore.data['watching'].get(self.current_uuid, False):
-                c = self.datastore.data['watching'][self.current_uuid].get('consecutive_filter_failures', 5)
-            c += 1
 
-            # Send notification if we reached the threshold?
+        while not self.app.config.exit.is_set():
-            threshold = self.datastore.data['settings']['application'].get('filter_failure_notification_threshold_attempts', 0)
-            print("Filter for {} not found, consecutive_filter_failures: {}".format(self.current_uuid, c))
-            if threshold >0 and c >= threshold:
-                self.send_filter_failure_notification(self.current_uuid)
-                c = 0
 
-            self.datastore.update_watch(uuid=self.current_uuid, update_obj={'last_error': err_text,
-                                                               'consecutive_filter_failures': c})
-        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=self.current_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=self.current_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"
-            self.datastore.update_watch(uuid=self.current_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", self.current_uuid, str(e))
-            self.datastore.update_watch(uuid=self.current_uuid, update_obj={'last_error': str(e)})
-
-        else:
             try:
-                watch = self.datastore.data['watching'][self.current_uuid]
+                priority, uuid = self.q.get(block=False)
-                fname = "" # Saved history text filename
+            except queue.Empty:
+                pass
 
-                # For the FIRST time we check a site, or a change detected, save the snapshot.
+            else:
-                if changed_detected or not watch['last_checked']:
+                self.current_uuid = uuid
-                    # A change was detected
-                    fname = watch.save_history_text(contents=contents, timestamp=str(round(time.time())))
 
-                # Generally update anything interesting returned
+                if uuid in list(self.datastore.data['watching'].keys()):
-                update_obj['consecutive_filter_failures'] = 0
+                    changed_detected = False
-                self.datastore.update_watch(uuid=self.current_uuid, update_obj=update_obj)
+                    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()
 
-                # A change was detected
+                    try:
-                if changed_detected:
+                        changed_detected, update_obj, contents = update_handler.run(uuid)
-                    n_object = {}
+                        # Re #342
-                    print (">> Change detected in UUID {} - {}".format(self.current_uuid, watch['url']))
+                        # 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
 
-                    # Notifications should only trigger on the second time (first time, we gather the initial snapshot)
+                    except content_fetcher.Non200ErrorCodeReceived as e:
-                    if watch.history_n >= 2:
+                        if e.status_code == 403:
-                        # Atleast 2, means there really was a change
+                            err_text = "Error - 403 (Access denied) received"
-                        self.datastore.update_watch(uuid=self.current_uuid, update_obj={'last_changed': round(now)})
+                        elif e.status_code == 404:
-
+                            err_text = "Error - 404 (Page not found) received"
-                        watch_history = watch.history
+                        elif e.status_code == 500:
-                        dates = list(watch_history.keys())
+                            err_text = "Error - 500 (Internal server Error) received"
-                        # Theoretically it's possible that this could be just 1 long,
-                        # - In the case that the timestamp key was not unique
-                        if len(dates) == 1:
-                            raise ValueError(
-                                "History index had 2 or more, but only 1 date loaded, timestamps were not unique? maybe two of the same timestamps got written, needs more delay?"
-                            )
-                        prev_fname = watch_history[dates[-2]]
-
-                        # Did it have any notification alerts to hit?
-                        if len(watch['notification_urls']):
-                            print(">>> Notifications queued for UUID from watch {}".format(self.current_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(self.current_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.")
+                            err_text = "Error - Request returned a HTTP error code {}".format(str(e.status_code))
 
-                        # Only prepare to notify if the rules above matched
+                        if e.screenshot:
-                        if 'notification_urls' in n_object:
+                            self.datastore.save_screenshot(watch_uuid=uuid, screenshot=e.screenshot, as_error=True)
-                            # HTML needs linebreak, but MarkDown and Text can use a linefeed
+                        if e.xpath_data:
-                            if n_object['notification_format'] == 'HTML':
+                            self.datastore.save_xpath_data(watch_uuid=uuid, data=e.xpath_data, as_error=True)
-                                line_feed_sep = "</br>"
+                        if e.page_text:
-                            else:
+                            self.datastore.save_error_text(watch_uuid=uuid, contents=e.page_text)
-                                line_feed_sep = "\n"
 
-                            from changedetectionio import diff
+                        self.datastore.update_watch(uuid=uuid, update_obj={'last_error': err_text,
-                            n_object.update({
+                                                                           # So that we get a trigger when the content is added again
-                                'watch_url': watch['url'],
+                                                                           'previous_md5': ''})
-                                'uuid': self.current_uuid,
+                        process_changedetection_results = False
-                                '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 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': ''})
 
-            except Exception as e:
+                        # Only when enabled, send the notification
-                # Catch everything possible here, so that if a worker crashes, we don't lose it until restart!
+                        if self.datastore.data['watching'][uuid].get('filter_failure_notification_send', False):
-                print("!!!! Exception in update_worker !!!\n", e)
+                            c = self.datastore.data['watching'][uuid].get('consecutive_filter_failures', 5)
-                self.app.logger.error("Exception reached processing watch UUID: %s - %s", self.current_uuid, str(e))
+                            c += 1
-                self.datastore.update_watch(uuid=self.current_uuid, update_obj={'last_error': str(e)})
+                            # 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
 
-        finally:
+                            self.datastore.update_watch(uuid=uuid, update_obj={'consecutive_filter_failures': c})
-            # Always record that we atleast tried
-            self.datastore.update_watch(uuid=self.current_uuid, update_obj={'fetch_time': round(time.time() - now, 3),
-                                                               'last_checked': round(time.time())})
 
-            # Always save the screenshot if it's available
+                        process_changedetection_results = True
-            if screenshot:
+
-                self.datastore.save_screenshot(watch_uuid=self.current_uuid, screenshot=screenshot)
+                    except content_fetcher.EmptyReply as e:
-            if xpath_data:
+                        # Some kind of custom to-str handler in the exception handler that does this?
-                self.datastore.save_xpath_data(watch_uuid=self.current_uuid, data=xpath_data)
+                        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:
+                        # @todo connection-refused ?
+                        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)
 
 
+                        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)})
+
+
+                    # 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 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)

requirements.txt

@@ -18,7 +18,7 @@ wtforms ~= 3.0
 jsonpath-ng ~= 1.5.3
 
 # Notification library
-apprise ~= 0.9.9
+apprise ~= 1.0.0
 
 # apprise mqtt https://github.com/dgtlmoon/changedetection.io/issues/315
 paho-mqtt