You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
7.0 KiB
144 lines
7.0 KiB
from abc import abstractmethod
|
|
import os
|
|
import hashlib
|
|
import re
|
|
from copy import deepcopy
|
|
from distutils.util import strtobool
|
|
from loguru import logger
|
|
|
|
class difference_detection_processor():
|
|
|
|
browser_steps = None
|
|
datastore = None
|
|
fetcher = None
|
|
screenshot = None
|
|
watch = None
|
|
xpath_data = None
|
|
|
|
def __init__(self, *args, datastore, watch_uuid, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
self.datastore = datastore
|
|
self.watch = deepcopy(self.datastore.data['watching'].get(watch_uuid))
|
|
|
|
def call_browser(self):
|
|
|
|
# Protect against file:// access
|
|
if re.search(r'^file://', self.watch.get('url', '').strip(), re.IGNORECASE):
|
|
if not strtobool(os.getenv('ALLOW_FILE_URI', 'false')):
|
|
raise Exception(
|
|
"file:// type access is denied for security reasons."
|
|
)
|
|
|
|
url = self.watch.link
|
|
|
|
# Requests, playwright, other browser via wss:// etc, fetch_extra_something
|
|
prefer_fetch_backend = self.watch.get('fetch_backend', 'system')
|
|
|
|
# Proxy ID "key"
|
|
preferred_proxy_id = self.datastore.get_preferred_proxy_for_watch(uuid=self.watch.get('uuid'))
|
|
|
|
# Pluggable content self.fetcher
|
|
if not prefer_fetch_backend or prefer_fetch_backend == 'system':
|
|
prefer_fetch_backend = self.datastore.data['settings']['application'].get('fetch_backend')
|
|
|
|
# In the case that the preferred fetcher was a browser config with custom connection URL..
|
|
# @todo - on save watch, if its extra_browser_ then it should be obvious it will use playwright (like if its requests now..)
|
|
custom_browser_connection_url = None
|
|
if prefer_fetch_backend.startswith('extra_browser_'):
|
|
(t, key) = prefer_fetch_backend.split('extra_browser_')
|
|
connection = list(
|
|
filter(lambda s: (s['browser_name'] == key), self.datastore.data['settings']['requests'].get('extra_browsers', [])))
|
|
if connection:
|
|
prefer_fetch_backend = 'html_webdriver'
|
|
custom_browser_connection_url = connection[0].get('browser_connection_url')
|
|
|
|
# PDF should be html_requests because playwright will serve it up (so far) in a embedded page
|
|
# @todo https://github.com/dgtlmoon/changedetection.io/issues/2019
|
|
# @todo needs test to or a fix
|
|
if self.watch.is_pdf:
|
|
prefer_fetch_backend = "html_requests"
|
|
|
|
# Grab the right kind of 'fetcher', (playwright, requests, etc)
|
|
from changedetectionio import content_fetchers
|
|
if hasattr(content_fetchers, prefer_fetch_backend):
|
|
# @todo TEMPORARY HACK - SWITCH BACK TO PLAYWRIGHT FOR BROWSERSTEPS
|
|
if prefer_fetch_backend == 'html_webdriver' and self.watch.has_browser_steps:
|
|
# This is never supported in selenium anyway
|
|
logger.warning("Using playwright fetcher override for possible puppeteer request in browsersteps, because puppetteer:browser steps is incomplete.")
|
|
from changedetectionio.content_fetchers.playwright import fetcher as playwright_fetcher
|
|
fetcher_obj = playwright_fetcher
|
|
else:
|
|
fetcher_obj = getattr(content_fetchers, prefer_fetch_backend)
|
|
else:
|
|
# What it referenced doesnt exist, Just use a default
|
|
fetcher_obj = getattr(content_fetchers, "html_requests")
|
|
|
|
proxy_url = None
|
|
if preferred_proxy_id:
|
|
proxy_url = self.datastore.proxy_list.get(preferred_proxy_id).get('url')
|
|
logger.debug(f"Selected proxy key '{preferred_proxy_id}' as proxy URL '{proxy_url}' for {url}")
|
|
|
|
# Now call the fetcher (playwright/requests/etc) with arguments that only a fetcher would need.
|
|
# When browser_connection_url is None, it method should default to working out whats the best defaults (os env vars etc)
|
|
self.fetcher = fetcher_obj(proxy_override=proxy_url,
|
|
custom_browser_connection_url=custom_browser_connection_url
|
|
)
|
|
|
|
if self.watch.has_browser_steps:
|
|
self.fetcher.browser_steps = self.watch.get('browser_steps', [])
|
|
self.fetcher.browser_steps_screenshot_path = os.path.join(self.datastore.datastore_path, self.watch.get('uuid'))
|
|
|
|
# Tweak the base config with the per-watch ones
|
|
request_headers = self.watch.get('headers', [])
|
|
request_headers.update(self.datastore.get_all_base_headers())
|
|
request_headers.update(self.datastore.get_all_headers_in_textfile_for_watch(uuid=self.watch.get('uuid')))
|
|
|
|
# https://github.com/psf/requests/issues/4525
|
|
# Requests doesnt yet support brotli encoding, so don't put 'br' here, be totally sure that the user cannot
|
|
# do this by accident.
|
|
if 'Accept-Encoding' in request_headers and "br" in request_headers['Accept-Encoding']:
|
|
request_headers['Accept-Encoding'] = request_headers['Accept-Encoding'].replace(', br', '')
|
|
|
|
timeout = self.datastore.data['settings']['requests'].get('timeout')
|
|
|
|
request_body = self.watch.get('body')
|
|
request_method = self.watch.get('method')
|
|
ignore_status_codes = self.watch.get('ignore_status_codes', False)
|
|
|
|
# Configurable per-watch or global extra delay before extracting text (for webDriver types)
|
|
system_webdriver_delay = self.datastore.data['settings']['application'].get('webdriver_delay', None)
|
|
if self.watch.get('webdriver_delay'):
|
|
self.fetcher.render_extract_delay = self.watch.get('webdriver_delay')
|
|
elif system_webdriver_delay is not None:
|
|
self.fetcher.render_extract_delay = system_webdriver_delay
|
|
|
|
if self.watch.get('webdriver_js_execute_code') is not None and self.watch.get('webdriver_js_execute_code').strip():
|
|
self.fetcher.webdriver_js_execute_code = self.watch.get('webdriver_js_execute_code')
|
|
|
|
# Requests for PDF's, images etc should be passwd the is_binary flag
|
|
is_binary = self.watch.is_pdf
|
|
|
|
# And here we go! call the right browser with browser-specific settings
|
|
self.fetcher.run(url, timeout, request_headers, request_body, request_method, ignore_status_codes, self.watch.get('include_filters'),
|
|
is_binary=is_binary)
|
|
|
|
#@todo .quit here could go on close object, so we can run JS if change-detected
|
|
self.fetcher.quit()
|
|
|
|
# After init, call run_changedetection() which will do the actual change-detection
|
|
|
|
@abstractmethod
|
|
def run_changedetection(self, uuid, skip_when_checksum_same=True):
|
|
update_obj = {'last_notification_error': False, 'last_error': False}
|
|
some_data = 'xxxxx'
|
|
update_obj["previous_md5"] = hashlib.md5(some_data.encode('utf-8')).hexdigest()
|
|
changed_detected = False
|
|
return changed_detected, update_obj, ''.encode('utf-8')
|
|
|
|
|
|
def available_processors():
|
|
from . import restock_diff, text_json_diff
|
|
x=[('text_json_diff', text_json_diff.name), ('restock_diff', restock_diff.name)]
|
|
# @todo Make this smarter with introspection of sorts.
|
|
return x
|