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changedetection.io/changedetectionio/model/__init__.py
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import os
import uuid
from changedetectionio import strtobool
USE_SYSTEM_DEFAULT_NOTIFICATION_FORMAT_FOR_WATCH = 'System default'
CONDITIONS_MATCH_LOGIC_DEFAULT = 'ALL'
class watch_base(dict):
def __init__(self, *arg, **kw):
self.update({
# Custom notification content
# Re #110, so then if this is set to None, we know to use the default value instead
# Requires setting to None on submit if it's the same as the default
# Should be all None by default, so we use the system default in this case.
'body': None,
'browser_steps': [],
'browser_steps_last_error_step': None,
'conditions' : {},
'conditions_match_logic': CONDITIONS_MATCH_LOGIC_DEFAULT,
'check_count': 0,
'check_unique_lines': False, # On change-detected, compare against all history if its something new
'consecutive_filter_failures': 0, # Every time the CSS/xPath filter cannot be located, reset when all is fine.
'content-type': None,
'date_created': None,
'extract_text': [], # Extract text by regex after filters
'fetch_backend': 'system', # plaintext, playwright etc
'fetch_time': 0.0,
'filter_failure_notification_send': strtobool(os.getenv('FILTER_FAILURE_NOTIFICATION_SEND_DEFAULT', 'True')),
'filter_text_added': True,
'filter_text_removed': True,
'filter_text_replaced': True,
'follow_price_changes': True,
'has_ldjson_price_data': None,
'history_snapshot_max_length': None,
'headers': {}, # Extra headers to send
'ignore_text': [], # List of text to ignore when calculating the comparison checksum
'ignore_status_codes': None,
'in_stock_only': True, # Only trigger change on going to instock from out-of-stock
'include_filters': [],
'last_checked': 0,
'last_error': False,
'last_notification_error': None,
'last_viewed': 0, # history key value of the last viewed via the [diff] link
'method': 'GET',
'notification_alert_count': 0,
'notification_body': None,
'notification_format': USE_SYSTEM_DEFAULT_NOTIFICATION_FORMAT_FOR_WATCH,
'notification_muted': False,
'notification_screenshot': False, # Include the latest screenshot if available and supported by the apprise URL
'notification_title': None,
'notification_urls': [], # List of URLs to add to the notification Queue (Usually AppRise)
'page_title': None, # <title> from the page
'paused': False,
'previous_md5': False,
'previous_md5_before_filters': False, # Used for skipping changedetection entirely
'processor': 'text_json_diff', # could be restock_diff or others from .processors
'price_change_threshold_percent': None,
'proxy': None, # Preferred proxy connection
'remote_server_reply': None, # From 'server' reply header
'sort_text_alphabetically': False,
'strip_ignored_lines': None,
'subtractive_selectors': [],
'tag': '', # Old system of text name for a tag, to be removed
'tags': [], # list of UUIDs to App.Tags
'text_should_not_be_present': [], # Text that should not present
'time_between_check': {'weeks': None, 'days': None, 'hours': None, 'minutes': None, 'seconds': None},
'time_between_check_use_default': True,
"time_schedule_limit": {
"enabled": False,
"monday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"tuesday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"wednesday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"thursday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"friday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"saturday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
"sunday": {
"enabled": True,
"start_time": "00:00",
"duration": {
"hours": "24",
"minutes": "00"
}
},
},
'title': None, # An arbitrary field that overrides 'page_title'
'track_ldjson_price_data': None,
'trim_text_whitespace': False,
'remove_duplicate_lines': False,
'trigger_text': [], # List of text or regex to wait for until a change is detected
'url': '',
'use_page_title_in_list': None, # None = use system settings
'uuid': str(uuid.uuid4()),
'webdriver_delay': None,
'webdriver_js_execute_code': None, # Run before change-detection
})
super(watch_base, self).__init__(*arg, **kw)
if self.get('default'):
del self['default']
def __deepcopy__(self, memo):
"""
Custom deepcopy for all watch_base subclasses (Watch, Tag, etc.).
CRITICAL FIX: Prevents copying large reference objects like __datastore
which would cause exponential memory growth when Watch objects are deepcopied.
This is called by:
- api/Watch.py:76 (API endpoint)
- api/Tags.py:28 (Tags API)
- processors/base.py:26 (EVERY processor run)
- store/__init__.py:544 (clone watch)
- And other locations
"""
from copy import deepcopy
# Create new instance without calling __init__
cls = self.__class__
new_obj = cls.__new__(cls)
memo[id(self)] = new_obj
# Copy the dict data (all the settings)
for key, value in self.items():
new_obj[key] = deepcopy(value, memo)
# Copy instance attributes dynamically
# This handles Watch-specific attrs (like __datastore) and any future subclass attrs
for attr_name in dir(self):
# Skip methods, special attrs, and dict keys
if attr_name.startswith('_') and not attr_name.startswith('__'):
# This catches _model__datastore, _model__history_n, etc.
try:
attr_value = getattr(self, attr_name)
# Special handling: Share references to large objects instead of copying
# Examples: __datastore, __app_reference, __global_settings, etc.
if attr_name.endswith('__datastore') or attr_name.endswith('__app'):
# Share the reference (don't copy!) to prevent memory leaks
setattr(new_obj, attr_name, attr_value)
# Skip cache attributes - let them regenerate on demand
elif 'cache' in attr_name.lower():
pass # Don't copy caches
# Copy regular instance attributes
elif not callable(attr_value):
setattr(new_obj, attr_name, attr_value)
except AttributeError:
pass # Attribute doesn't exist in this instance
return new_obj
def __getstate__(self):
"""
Custom pickle serialization for all watch_base subclasses.
Excludes large reference objects (like __datastore) from serialization.
"""
# Get the dict data
state = dict(self)
# Collect instance attributes (excluding methods and large references)
instance_attrs = {}
for attr_name in dir(self):
if attr_name.startswith('_') and not attr_name.startswith('__'):
try:
attr_value = getattr(self, attr_name)
# Exclude large reference objects and caches from serialization
if not (attr_name.endswith('__datastore') or
attr_name.endswith('__app') or
'cache' in attr_name.lower() or
callable(attr_value)):
instance_attrs[attr_name] = attr_value
except AttributeError:
pass
if instance_attrs:
state['__instance_metadata__'] = instance_attrs
return state
def __setstate__(self, state):
"""
Custom pickle deserialization for all watch_base subclasses.
WARNING: Large reference objects (like __datastore) are NOT restored!
Caller must restore these references after unpickling if needed.
"""
# Extract metadata
metadata = state.pop('__instance_metadata__', {})
# Restore dict data
self.update(state)
# Restore instance attributes
for attr_name, attr_value in metadata.items():
setattr(self, attr_name, attr_value)
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