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470 lines
20 KiB
470 lines
20 KiB
import os
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import re
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from wtforms import (
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BooleanField,
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Form,
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IntegerField,
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RadioField,
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SelectField,
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StringField,
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SubmitField,
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TextAreaField,
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fields,
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validators,
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widgets
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)
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from wtforms.fields import FieldList
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from wtforms.validators import ValidationError
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# default
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# each select <option data-enabled="enabled-0-0"
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from changedetectionio.blueprint.browser_steps.browser_steps import browser_step_ui_config
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from changedetectionio import content_fetcher
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from changedetectionio.notification import (
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valid_notification_formats,
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)
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from wtforms.fields import FormField
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valid_method = {
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'GET',
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'POST',
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'PUT',
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'PATCH',
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'DELETE',
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}
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default_method = 'GET'
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class StringListField(StringField):
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widget = widgets.TextArea()
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def _value(self):
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if self.data:
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# ignore empty lines in the storage
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data = list(filter(lambda x: len(x.strip()), self.data))
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# Apply strip to each line
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data = list(map(lambda x: x.strip(), data))
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return "\r\n".join(data)
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else:
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return u''
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# incoming
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def process_formdata(self, valuelist):
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if valuelist and len(valuelist[0].strip()):
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# Remove empty strings, stripping and splitting \r\n, only \n etc.
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self.data = valuelist[0].splitlines()
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# Remove empty lines from the final data
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self.data = list(filter(lambda x: len(x.strip()), self.data))
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else:
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self.data = []
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class SaltyPasswordField(StringField):
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widget = widgets.PasswordInput()
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encrypted_password = ""
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def build_password(self, password):
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import base64
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import hashlib
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import secrets
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# Make a new salt on every new password and store it with the password
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salt = secrets.token_bytes(32)
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key = hashlib.pbkdf2_hmac('sha256', password.encode('utf-8'), salt, 100000)
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store = base64.b64encode(salt + key).decode('ascii')
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return store
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# incoming
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def process_formdata(self, valuelist):
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if valuelist:
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# Be really sure it's non-zero in length
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if len(valuelist[0].strip()) > 0:
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self.encrypted_password = self.build_password(valuelist[0])
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self.data = ""
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else:
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self.data = False
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class TimeBetweenCheckForm(Form):
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weeks = IntegerField('Weeks', validators=[validators.Optional(), validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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days = IntegerField('Days', validators=[validators.Optional(), validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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hours = IntegerField('Hours', validators=[validators.Optional(), validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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minutes = IntegerField('Minutes', validators=[validators.Optional(), validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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seconds = IntegerField('Seconds', validators=[validators.Optional(), validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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# @todo add total seconds minimum validatior = minimum_seconds_recheck_time
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# Separated by key:value
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class StringDictKeyValue(StringField):
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widget = widgets.TextArea()
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def _value(self):
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if self.data:
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output = u''
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for k in self.data.keys():
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output += "{}: {}\r\n".format(k, self.data[k])
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return output
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else:
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return u''
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# incoming
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def process_formdata(self, valuelist):
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if valuelist:
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self.data = {}
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# Remove empty strings
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cleaned = list(filter(None, valuelist[0].split("\n")))
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for s in cleaned:
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parts = s.strip().split(':', 1)
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if len(parts) == 2:
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self.data.update({parts[0].strip(): parts[1].strip()})
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else:
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self.data = {}
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class ValidateContentFetcherIsReady(object):
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"""
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Validates that anything that looks like a regex passes as a regex
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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import urllib3.exceptions
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from changedetectionio import content_fetcher
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# Better would be a radiohandler that keeps a reference to each class
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if field.data is not None:
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klass = getattr(content_fetcher, field.data)
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some_object = klass()
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try:
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ready = some_object.is_ready()
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except urllib3.exceptions.MaxRetryError as e:
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driver_url = some_object.command_executor
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message = field.gettext('Content fetcher \'%s\' did not respond.' % (field.data))
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message += '<br/>' + field.gettext(
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'Be sure that the selenium/webdriver runner is running and accessible via network from this container/host.')
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message += '<br/>' + field.gettext('Did you follow the instructions in the wiki?')
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message += '<br/><br/>' + field.gettext('WebDriver Host: %s' % (driver_url))
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message += '<br/><a href="https://github.com/dgtlmoon/changedetection.io/wiki/Fetching-pages-with-WebDriver">Go here for more information</a>'
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message += '<br/>'+field.gettext('Content fetcher did not respond properly, unable to use it.\n %s' % (str(e)))
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raise ValidationError(message)
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except Exception as e:
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message = field.gettext('Content fetcher \'%s\' did not respond properly, unable to use it.\n %s')
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raise ValidationError(message % (field.data, e))
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class ValidateNotificationBodyAndTitleWhenURLisSet(object):
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"""
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Validates that they entered something in both notification title+body when the URL is set
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Due to https://github.com/dgtlmoon/changedetection.io/issues/360
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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if len(field.data):
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if not len(form.notification_title.data) or not len(form.notification_body.data):
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message = field.gettext('Notification Body and Title is required when a Notification URL is used')
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raise ValidationError(message)
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class ValidateAppRiseServers(object):
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"""
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Validates that each URL given is compatible with AppRise
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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import apprise
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apobj = apprise.Apprise()
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for server_url in field.data:
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if not apobj.add(server_url):
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message = field.gettext('\'%s\' is not a valid AppRise URL.' % (server_url))
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raise ValidationError(message)
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class ValidateJinja2Template(object):
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"""
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Validates that a {token} is from a valid set
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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from changedetectionio import notification
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from jinja2 import Environment, BaseLoader, TemplateSyntaxError
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from jinja2.meta import find_undeclared_variables
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try:
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jinja2_env = Environment(loader=BaseLoader)
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jinja2_env.globals.update(notification.valid_tokens)
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rendered = jinja2_env.from_string(field.data).render()
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except TemplateSyntaxError as e:
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raise ValidationError(f"This is not a valid Jinja2 template: {e}") from e
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ast = jinja2_env.parse(field.data)
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undefined = ", ".join(find_undeclared_variables(ast))
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if undefined:
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raise ValidationError(
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f"The following tokens used in the notification are not valid: {undefined}"
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)
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class validateURL(object):
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"""
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Flask wtform validators wont work with basic auth
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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import validators
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try:
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validators.url(field.data.strip())
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except validators.ValidationFailure:
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message = field.gettext('\'%s\' is not a valid URL.' % (field.data.strip()))
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raise ValidationError(message)
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class ValidateListRegex(object):
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"""
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Validates that anything that looks like a regex passes as a regex
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"""
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def __init__(self, message=None):
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self.message = message
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def __call__(self, form, field):
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for line in field.data:
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if line[0] == '/' and line[-1] == '/':
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# Because internally we dont wrap in /
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line = line.strip('/')
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try:
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re.compile(line)
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except re.error:
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message = field.gettext('RegEx \'%s\' is not a valid regular expression.')
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raise ValidationError(message % (line))
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class ValidateCSSJSONXPATHInput(object):
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"""
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Filter validation
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@todo CSS validator ;)
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"""
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def __init__(self, message=None, allow_xpath=True, allow_json=True):
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self.message = message
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self.allow_xpath = allow_xpath
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self.allow_json = allow_json
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def __call__(self, form, field):
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if isinstance(field.data, str):
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data = [field.data]
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else:
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data = field.data
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for line in data:
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# Nothing to see here
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if not len(line.strip()):
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return
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# Does it look like XPath?
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if line.strip()[0] == '/':
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if not self.allow_xpath:
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raise ValidationError("XPath not permitted in this field!")
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from lxml import etree, html
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tree = html.fromstring("<html></html>")
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try:
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tree.xpath(line.strip())
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except etree.XPathEvalError as e:
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message = field.gettext('\'%s\' is not a valid XPath expression. (%s)')
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raise ValidationError(message % (line, str(e)))
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except:
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raise ValidationError("A system-error occurred when validating your XPath expression")
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if 'json:' in line:
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if not self.allow_json:
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raise ValidationError("JSONPath not permitted in this field!")
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from jsonpath_ng.exceptions import (
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JsonPathLexerError,
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JsonPathParserError,
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)
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from jsonpath_ng.ext import parse
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input = line.replace('json:', '')
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try:
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parse(input)
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except (JsonPathParserError, JsonPathLexerError) as e:
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message = field.gettext('\'%s\' is not a valid JSONPath expression. (%s)')
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raise ValidationError(message % (input, str(e)))
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except:
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raise ValidationError("A system-error occurred when validating your JSONPath expression")
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# Re #265 - maybe in the future fetch the page and offer a
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# warning/notice that its possible the rule doesnt yet match anything?
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if not self.allow_json:
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raise ValidationError("jq not permitted in this field!")
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if 'jq:' in line:
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try:
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import jq
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except ModuleNotFoundError:
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# `jq` requires full compilation in windows and so isn't generally available
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raise ValidationError("jq not support not found")
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input = line.replace('jq:', '')
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try:
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jq.compile(input)
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except (ValueError) as e:
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message = field.gettext('\'%s\' is not a valid jq expression. (%s)')
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raise ValidationError(message % (input, str(e)))
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except:
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raise ValidationError("A system-error occurred when validating your jq expression")
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class quickWatchForm(Form):
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url = fields.URLField('URL', validators=[validateURL()])
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tag = StringField('Group tag', [validators.Optional()])
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watch_submit_button = SubmitField('Watch', render_kw={"class": "pure-button pure-button-primary"})
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edit_and_watch_submit_button = SubmitField('Edit > Watch', render_kw={"class": "pure-button pure-button-primary"})
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# Common to a single watch and the global settings
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class commonSettingsForm(Form):
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notification_urls = StringListField('Notification URL List', validators=[validators.Optional(), ValidateAppRiseServers()])
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notification_title = StringField('Notification Title', default='ChangeDetection.io Notification - {{ watch_url }}', validators=[validators.Optional(), ValidateJinja2Template()])
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notification_body = TextAreaField('Notification Body', default='{{ watch_url }} had a change.', validators=[validators.Optional(), ValidateJinja2Template()])
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notification_format = SelectField('Notification format', choices=valid_notification_formats.keys())
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fetch_backend = RadioField(u'Fetch Method', choices=content_fetcher.available_fetchers(), validators=[ValidateContentFetcherIsReady()])
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extract_title_as_title = BooleanField('Extract <title> from document and use as watch title', default=False)
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webdriver_delay = IntegerField('Wait seconds before extracting text', validators=[validators.Optional(), validators.NumberRange(min=1,
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message="Should contain one or more seconds")])
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class SingleBrowserStep(Form):
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operation = SelectField('Operation', [validators.Optional()], choices=browser_step_ui_config.keys())
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# maybe better to set some <script>var..
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selector = StringField('Selector', [validators.Optional()], render_kw={"placeholder": "CSS or xPath selector"})
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optional_value = StringField('value', [validators.Optional()], render_kw={"placeholder": "Value"})
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# @todo move to JS? ajax fetch new field?
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# remove_button = SubmitField('-', render_kw={"type": "button", "class": "pure-button pure-button-primary", 'title': 'Remove'})
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# add_button = SubmitField('+', render_kw={"type": "button", "class": "pure-button pure-button-primary", 'title': 'Add new step after'})
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class watchForm(commonSettingsForm):
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url = fields.URLField('URL', validators=[validateURL()])
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tag = StringField('Group tag', [validators.Optional()], default='')
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time_between_check = FormField(TimeBetweenCheckForm)
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include_filters = StringListField('CSS/JSONPath/JQ/XPath Filters', [ValidateCSSJSONXPATHInput()], default='')
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subtractive_selectors = StringListField('Remove elements', [ValidateCSSJSONXPATHInput(allow_xpath=False, allow_json=False)])
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extract_text = StringListField('Extract text', [ValidateListRegex()])
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title = StringField('Title', default='')
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ignore_text = StringListField('Ignore text', [ValidateListRegex()])
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headers = StringDictKeyValue('Request headers')
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body = TextAreaField('Request body', [validators.Optional()])
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method = SelectField('Request method', choices=valid_method, default=default_method)
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ignore_status_codes = BooleanField('Ignore status codes (process non-2xx status codes as normal)', default=False)
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check_unique_lines = BooleanField('Only trigger when new lines appear', default=False)
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trigger_text = StringListField('Trigger/wait for text', [validators.Optional(), ValidateListRegex()])
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if os.getenv("PLAYWRIGHT_DRIVER_URL"):
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browser_steps = FieldList(FormField(SingleBrowserStep), min_entries=10)
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text_should_not_be_present = StringListField('Block change-detection if text matches', [validators.Optional(), ValidateListRegex()])
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webdriver_js_execute_code = TextAreaField('Execute JavaScript before change detection', render_kw={"rows": "5"}, validators=[validators.Optional()])
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save_button = SubmitField('Save', render_kw={"class": "pure-button pure-button-primary"})
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proxy = RadioField('Proxy')
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filter_failure_notification_send = BooleanField(
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'Send a notification when the filter can no longer be found on the page', default=False)
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notification_muted = BooleanField('Notifications Muted / Off', default=False)
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notification_screenshot = BooleanField('Attach screenshot to notification (where possible)', default=False)
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def validate(self, **kwargs):
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if not super().validate():
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return False
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result = True
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# Fail form validation when a body is set for a GET
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if self.method.data == 'GET' and self.body.data:
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self.body.errors.append('Body must be empty when Request Method is set to GET')
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result = False
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# Attempt to validate jinja2 templates in the URL
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from jinja2 import Environment
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# Jinja2 available in URLs along with https://pypi.org/project/jinja2-time/
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jinja2_env = Environment(extensions=['jinja2_time.TimeExtension'])
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try:
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ready_url = str(jinja2_env.from_string(self.url.data).render())
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except Exception as e:
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self.url.errors.append('Invalid template syntax')
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result = False
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return result
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# datastore.data['settings']['requests']..
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class globalSettingsRequestForm(Form):
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time_between_check = FormField(TimeBetweenCheckForm)
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proxy = RadioField('Proxy')
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jitter_seconds = IntegerField('Random jitter seconds ± check',
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render_kw={"style": "width: 5em;"},
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validators=[validators.NumberRange(min=0, message="Should contain zero or more seconds")])
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# datastore.data['settings']['application']..
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class globalSettingsApplicationForm(commonSettingsForm):
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base_url = StringField('Base URL', validators=[validators.Optional()])
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global_subtractive_selectors = StringListField('Remove elements', [ValidateCSSJSONXPATHInput(allow_xpath=False, allow_json=False)])
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global_ignore_text = StringListField('Ignore Text', [ValidateListRegex()])
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ignore_whitespace = BooleanField('Ignore whitespace')
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removepassword_button = SubmitField('Remove password', render_kw={"class": "pure-button pure-button-primary"})
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empty_pages_are_a_change = BooleanField('Treat empty pages as a change?', default=False)
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render_anchor_tag_content = BooleanField('Render anchor tag content', default=False)
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fetch_backend = RadioField('Fetch Method', default="html_requests", choices=content_fetcher.available_fetchers(), validators=[ValidateContentFetcherIsReady()])
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api_access_token_enabled = BooleanField('API access token security check enabled', default=True, validators=[validators.Optional()])
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password = SaltyPasswordField()
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filter_failure_notification_threshold_attempts = IntegerField('Number of times the filter can be missing before sending a notification',
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render_kw={"style": "width: 5em;"},
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validators=[validators.NumberRange(min=0,
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message="Should contain zero or more attempts")])
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class globalSettingsForm(Form):
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# Define these as FormFields/"sub forms", this way it matches the JSON storage
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# datastore.data['settings']['application']..
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# datastore.data['settings']['requests']..
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requests = FormField(globalSettingsRequestForm)
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application = FormField(globalSettingsApplicationForm)
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save_button = SubmitField('Save', render_kw={"class": "pure-button pure-button-primary"})
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class extractDataForm(Form):
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extract_regex = StringField('RegEx to extract', validators=[validators.Length(min=1, message="Needs a RegEx")])
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extract_submit_button = SubmitField('Extract as CSV', render_kw={"class": "pure-button pure-button-primary"})
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