mirror of
https://github.com/optim-enterprises-bv/Mailu.git
synced 2025-10-30 17:47:55 +00:00
1275 lines
44 KiB
Python
1275 lines
44 KiB
Python
""" Mailu marshmallow fields and schema
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"""
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from copy import deepcopy
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from collections import Counter
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from datetime import timezone
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import json
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import logging
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import yaml
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import sqlalchemy
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from marshmallow import pre_load, post_load, post_dump, fields, Schema
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from marshmallow.utils import ensure_text_type
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from marshmallow.exceptions import ValidationError
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from marshmallow_sqlalchemy import SQLAlchemyAutoSchemaOpts
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from marshmallow_sqlalchemy.fields import RelatedList
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from flask_marshmallow import Marshmallow
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from cryptography.hazmat.primitives import serialization
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from pygments import highlight
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from pygments.token import Token
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from pygments.lexers import get_lexer_by_name
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from pygments.lexers.data import YamlLexer
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from pygments.formatters import get_formatter_by_name
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from mailu import models, dkim
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ma = Marshmallow()
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### import logging and schema colorization ###
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_model2schema = {}
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def get_schema(cls=None):
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""" return schema class for model """
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if cls is None:
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return _model2schema.values()
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return _model2schema.get(cls)
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def mapped(cls):
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""" register schema in model2schema map """
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_model2schema[cls.Meta.model] = cls
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return cls
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class Logger:
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""" helps with counting and colorizing
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imported and exported data
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"""
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class MyYamlLexer(YamlLexer):
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""" colorize yaml constants and integers """
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def get_tokens(self, text, unfiltered=False):
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for typ, value in super().get_tokens(text, unfiltered):
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if typ is Token.Literal.Scalar.Plain:
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if value in {'true', 'false', 'null'}:
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typ = Token.Keyword.Constant
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elif value == HIDDEN:
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typ = Token.Error
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else:
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try:
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int(value, 10)
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except ValueError:
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try:
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float(value)
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except ValueError:
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pass
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else:
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typ = Token.Literal.Number.Float
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else:
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typ = Token.Literal.Number.Integer
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yield typ, value
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def __init__(self, want_color=None, can_color=False, debug=False, secrets=False):
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self.lexer = 'yaml'
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self.formatter = 'terminal'
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self.strip = False
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self.verbose = 0
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self.quiet = False
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self.secrets = secrets
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self.debug = debug
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self.print = print
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self.color = want_color or can_color
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self._counter = Counter()
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self._schemas = {}
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# log contexts
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self._diff_context = {
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'full': True,
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'secrets': secrets,
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}
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log_context = {
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'secrets': secrets,
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}
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# register listeners
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for schema in get_schema():
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model = schema.Meta.model
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self._schemas[model] = schema(context=log_context)
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sqlalchemy.event.listen(model, 'after_insert', self._listen_insert)
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sqlalchemy.event.listen(model, 'after_update', self._listen_update)
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sqlalchemy.event.listen(model, 'after_delete', self._listen_delete)
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# special listener for dkim_key changes
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# TODO: _listen_dkim can be removed when dkim keys are stored in database
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self._dedupe_dkim = set()
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sqlalchemy.event.listen(models.db.session, 'after_flush', self._listen_dkim)
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# register debug logger for sqlalchemy
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if self.debug:
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logging.basicConfig()
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logging.getLogger('sqlalchemy.engine').setLevel(logging.INFO)
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def _log(self, action, target, message=None):
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if message is None:
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try:
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message = self._schemas[target.__class__].dump(target)
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except KeyError:
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message = target
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if not isinstance(message, str):
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message = repr(message)
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self.print(f'{action} {target.__table__}: {self.colorize(message)}')
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def _listen_insert(self, mapper, connection, target): # pylint: disable=unused-argument
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""" callback method to track import """
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self._counter.update([('Created', target.__table__.name)])
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if self.verbose:
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self._log('Created', target)
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def _listen_update(self, mapper, connection, target): # pylint: disable=unused-argument
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""" callback method to track import """
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changes = {}
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inspection = sqlalchemy.inspect(target)
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for attr in sqlalchemy.orm.class_mapper(target.__class__).column_attrs:
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history = getattr(inspection.attrs, attr.key).history
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if history.has_changes() and history.deleted:
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before = history.deleted[-1]
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after = getattr(target, attr.key)
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# we don't have ordered lists
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if isinstance(before, list):
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before = set(before)
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if isinstance(after, list):
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after = set(after)
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# TODO: this can be removed when comment is not nullable in model
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if attr.key == 'comment' and not before and not after:
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pass
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# only remember changed keys
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elif before != after:
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if self.verbose:
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changes[str(attr.key)] = (before, after)
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else:
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break
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if self.verbose:
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# use schema to log changed attributes
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schema = get_schema(target.__class__)
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only = set(changes.keys()) & set(schema().fields.keys())
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if only:
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for key, value in schema(
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only=only,
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context=self._diff_context
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).dump(target).items():
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before, after = changes[key]
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if value == HIDDEN:
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before = HIDDEN if before else before
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after = HIDDEN if after else after
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else:
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# also hide this
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after = value
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self._log('Modified', target, f'{str(target)!r} {key}: {before!r} -> {after!r}')
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if changes:
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self._counter.update([('Modified', target.__table__.name)])
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def _listen_delete(self, mapper, connection, target): # pylint: disable=unused-argument
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""" callback method to track import """
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self._counter.update([('Deleted', target.__table__.name)])
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if self.verbose:
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self._log('Deleted', target)
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# TODO: _listen_dkim can be removed when dkim keys are stored in database
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def _listen_dkim(self, session, flush_context): # pylint: disable=unused-argument
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""" callback method to track import """
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for target in session.identity_map.values():
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# look at Domains originally loaded from db
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if not isinstance(target, models.Domain) or not target._sa_instance_state.load_path:
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continue
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before = target._dkim_key_on_disk
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after = target._dkim_key
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# "de-dupe" messages; this event is fired at every flush
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if before == after or (target, before, after) in self._dedupe_dkim:
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continue
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self._dedupe_dkim.add((target, before, after))
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self._counter.update([('Modified', target.__table__.name)])
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if self.verbose:
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if self.secrets:
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before = before.decode('ascii', 'ignore')
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after = after.decode('ascii', 'ignore')
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else:
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before = HIDDEN if before else ''
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after = HIDDEN if after else ''
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self._log('Modified', target, f'{str(target)!r} dkim_key: {before!r} -> {after!r}')
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def track_serialize(self, obj, item, backref=None):
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""" callback method to track import """
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# called for backref modification?
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if backref is not None:
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self._log(
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'Modified', item, '{target!r} {key}: {before!r} -> {after!r}'.format_map(backref))
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return
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# show input data?
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if self.verbose < 2:
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return
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# hide secrets in data
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if not self.secrets:
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item = self._schemas[obj.opts.model].hide(item)
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if 'hash_password' in item:
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item['password'] = HIDDEN
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if 'fetches' in item:
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for fetch in item['fetches']:
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fetch['password'] = HIDDEN
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self._log('Handling', obj.opts.model, item)
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def changes(self, *messages, **kwargs):
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""" show changes gathered in counter """
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if self.quiet:
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return
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if self._counter:
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changes = []
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last = None
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for (action, what), count in sorted(self._counter.items()):
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if action != last:
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if last:
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changes.append('/')
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changes.append(f'{action}:')
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last = action
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changes.append(f'{what}({count})')
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else:
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changes = ['No changes.']
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self.print(*messages, *changes, **kwargs)
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def _format_errors(self, store, path=None):
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res = []
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if path is None:
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path = []
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for key in sorted(store):
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location = path + [str(key)]
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value = store[key]
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if isinstance(value, dict):
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res.extend(self._format_errors(value, location))
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else:
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for message in value:
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res.append((".".join(location), message))
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if path:
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return res
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maxlen = max(len(loc) for loc, msg in res)
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res = [f' - {loc.ljust(maxlen)} : {msg}' for loc, msg in res]
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errors = f'{len(res)} error{["s",""][len(res)==1]}'
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res.insert(0, f'[ValidationError] {errors} occurred during input validation')
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return '\n'.join(res)
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def _is_validation_error(self, exc):
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""" walk traceback to extract invalid field from marshmallow """
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path = []
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trace = exc.__traceback__
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while trace:
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if trace.tb_frame.f_code.co_name == '_serialize':
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if 'attr' in trace.tb_frame.f_locals:
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path.append(trace.tb_frame.f_locals['attr'])
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elif trace.tb_frame.f_code.co_name == '_init_fields':
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spec = ', '.join(
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'.'.join(path + [key])
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for key in trace.tb_frame.f_locals['invalid_fields'])
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return f'Invalid filter: {spec}'
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trace = trace.tb_next
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return None
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def format_exception(self, exc):
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""" format ValidationErrors and other exceptions when not debugging """
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if isinstance(exc, ValidationError):
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return self._format_errors(exc.messages)
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if isinstance(exc, ValueError):
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if msg := self._is_validation_error(exc):
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return msg
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if self.debug:
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return None
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msg = ' '.join(str(exc).split())
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return f'[{exc.__class__.__name__}] {msg}'
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colorscheme = {
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Token: ('', ''),
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Token.Name.Tag: ('cyan', 'cyan'),
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Token.Literal.Scalar: ('green', 'green'),
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Token.Literal.String: ('green', 'green'),
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Token.Name.Constant: ('green', 'green'), # multiline strings
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Token.Keyword.Constant: ('magenta', 'magenta'),
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Token.Literal.Number: ('magenta', 'magenta'),
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Token.Error: ('red', 'red'),
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Token.Name: ('red', 'red'),
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Token.Operator: ('red', 'red'),
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}
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def colorize(self, data, lexer=None, formatter=None, color=None, strip=None):
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""" add ANSI color to data """
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if color is False or not self.color:
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return data
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lexer = lexer or self.lexer
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lexer = Logger.MyYamlLexer() if lexer == 'yaml' else get_lexer_by_name(lexer)
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formatter = get_formatter_by_name(formatter or self.formatter, colorscheme=self.colorscheme)
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if strip is None:
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strip = self.strip
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res = highlight(data, lexer, formatter)
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if strip:
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return res.rstrip('\n')
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return res
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### marshmallow render modules ###
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# hidden attributes
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class _Hidden:
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def __bool__(self):
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return False
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def __copy__(self):
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return self
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def __deepcopy__(self, _):
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return self
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def __eq__(self, other):
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return str(other) == '<hidden>'
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def __repr__(self):
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return '<hidden>'
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__str__ = __repr__
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yaml.add_representer(
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_Hidden,
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lambda dumper, data: dumper.represent_data(str(data))
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)
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HIDDEN = _Hidden()
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# multiline attributes
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class _Multiline(str):
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pass
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yaml.add_representer(
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_Multiline,
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lambda dumper, data: dumper.represent_scalar(u'tag:yaml.org,2002:str', data, style='|')
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)
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# yaml render module
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class RenderYAML:
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""" Marshmallow YAML Render Module
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"""
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class SpacedDumper(yaml.Dumper):
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""" YAML Dumper to add a newline between main sections
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and double the indent used
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"""
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def write_line_break(self, data=None):
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super().write_line_break(data)
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if len(self.indents) == 1:
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super().write_line_break()
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def increase_indent(self, flow=False, indentless=False):
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return super().increase_indent(flow, False)
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@staticmethod
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def _augment(kwargs, defaults):
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""" add defaults to kwargs if missing
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"""
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for key, value in defaults.items():
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if key not in kwargs:
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kwargs[key] = value
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_load_defaults = {}
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@classmethod
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def loads(cls, *args, **kwargs):
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""" load yaml data from string
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"""
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cls._augment(kwargs, cls._load_defaults)
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return yaml.safe_load(*args, **kwargs)
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_dump_defaults = {
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'Dumper': SpacedDumper,
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'default_flow_style': False,
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'allow_unicode': True,
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'sort_keys': False,
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}
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@classmethod
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def dumps(cls, *args, **kwargs):
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""" dump data to yaml string
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"""
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cls._augment(kwargs, cls._dump_defaults)
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return yaml.dump(*args, **kwargs)
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# json encoder
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class JSONEncoder(json.JSONEncoder):
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""" JSONEncoder supporting serialization of HIDDEN """
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def default(self, o):
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""" serialize HIDDEN """
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if isinstance(o, _Hidden):
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return str(o)
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return json.JSONEncoder.default(self, o)
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# json render module
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class RenderJSON:
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""" Marshmallow JSON Render Module
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"""
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@staticmethod
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def _augment(kwargs, defaults):
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""" add defaults to kwargs if missing
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"""
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for key, value in defaults.items():
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if key not in kwargs:
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kwargs[key] = value
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_load_defaults = {}
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@classmethod
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def loads(cls, *args, **kwargs):
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""" load json data from string
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"""
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cls._augment(kwargs, cls._load_defaults)
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return json.loads(*args, **kwargs)
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_dump_defaults = {
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'separators': (',',':'),
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'cls': JSONEncoder,
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}
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@classmethod
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def dumps(cls, *args, **kwargs):
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""" dump data to json string
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"""
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cls._augment(kwargs, cls._dump_defaults)
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return json.dumps(*args, **kwargs)
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### marshmallow: custom fields ###
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def _rfc3339(datetime):
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""" dump datetime according to rfc3339 """
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if datetime.tzinfo is None:
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datetime = datetime.astimezone(timezone.utc)
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res = datetime.isoformat()
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if res.endswith('+00:00'):
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return f'{res[:-6]}Z'
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return res
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fields.DateTime.SERIALIZATION_FUNCS['rfc3339'] = _rfc3339
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fields.DateTime.DESERIALIZATION_FUNCS['rfc3339'] = fields.DateTime.DESERIALIZATION_FUNCS['iso']
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fields.DateTime.DEFAULT_FORMAT = 'rfc3339'
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class LazyStringField(fields.String):
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""" Field that serializes a "false" value to the empty string
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"""
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def _serialize(self, value, attr, obj, **kwargs):
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""" serialize None to the empty string
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"""
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return value if value else ''
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class CommaSeparatedListField(fields.Raw):
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""" Deserialize a string containing comma-separated values to
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a list of strings
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"""
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default_error_messages = {
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"invalid": "Not a valid string or list.",
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"invalid_utf8": "Not a valid utf-8 string or list.",
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}
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def _deserialize(self, value, attr, data, **kwargs):
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""" deserialize comma separated string to list of strings
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"""
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# empty
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if not value:
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return []
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# handle list
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if isinstance(value, list):
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try:
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value = [ensure_text_type(item) for item in value]
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except UnicodeDecodeError as exc:
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raise self.make_error("invalid_utf8") from exc
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# handle text
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else:
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if not isinstance(value, (str, bytes)):
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raise self.make_error("invalid")
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try:
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value = ensure_text_type(value)
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except UnicodeDecodeError as exc:
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raise self.make_error("invalid_utf8") from exc
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else:
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value = filter(bool, (item.strip() for item in value.split(',')))
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return list(value)
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class DkimKeyField(fields.String):
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""" Serialize a dkim key to a multiline string and
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deserialize a dkim key data as string or list of strings
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to a valid dkim key
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"""
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default_error_messages = {
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"invalid": "Not a valid string or list.",
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"invalid_utf8": "Not a valid utf-8 string or list.",
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}
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def _serialize(self, value, attr, obj, **kwargs):
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""" serialize dkim key as multiline string
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"""
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# map empty string and None to None
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if not value:
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return ''
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# return multiline string
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return _Multiline(value.decode('utf-8'))
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def _wrap_key(self, begin, data, end):
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""" generator to wrap key into RFC 7468 format """
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yield begin
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pos = 0
|
|
while pos < len(data):
|
|
yield data[pos:pos+64]
|
|
pos += 64
|
|
yield end
|
|
yield ''
|
|
|
|
def _deserialize(self, value, attr, data, **kwargs):
|
|
""" deserialize a string or list of strings to dkim key data
|
|
with verification
|
|
"""
|
|
|
|
# convert list to str
|
|
if isinstance(value, list):
|
|
try:
|
|
value = ''.join(ensure_text_type(item) for item in value).strip()
|
|
except UnicodeDecodeError as exc:
|
|
raise self.make_error("invalid_utf8") from exc
|
|
|
|
# only text is allowed
|
|
else:
|
|
if not isinstance(value, (str, bytes)):
|
|
raise self.make_error("invalid")
|
|
try:
|
|
value = ensure_text_type(value).strip()
|
|
except UnicodeDecodeError as exc:
|
|
raise self.make_error("invalid_utf8") from exc
|
|
|
|
# generate new key?
|
|
if value.lower() == '-generate-':
|
|
return dkim.gen_key()
|
|
|
|
# no key?
|
|
if not value:
|
|
return None
|
|
|
|
# remember part of value for ValidationError
|
|
bad_key = value
|
|
|
|
# strip header and footer, clean whitespace and wrap to 64 characters
|
|
try:
|
|
if value.startswith('-----BEGIN '):
|
|
end = value.index('-----', 11) + 5
|
|
header = value[:end]
|
|
value = value[end:]
|
|
else:
|
|
header = '-----BEGIN PRIVATE KEY-----'
|
|
|
|
if (pos := value.find('-----END ')) >= 0:
|
|
end = value.index('-----', pos+9) + 5
|
|
footer = value[pos:end]
|
|
value = value[:pos]
|
|
else:
|
|
footer = '-----END PRIVATE KEY-----'
|
|
except ValueError as exc:
|
|
raise ValidationError(f'invalid dkim key {bad_key!r}') from exc
|
|
|
|
# remove whitespace from key data
|
|
value = ''.join(value.split())
|
|
|
|
# remember part of value for ValidationError
|
|
bad_key = f'{value[:25]}...{value[-10:]}' if len(value) > 40 else value
|
|
|
|
# wrap key according to RFC 7468
|
|
value = ('\n'.join(self._wrap_key(header, value, footer))).encode('ascii')
|
|
|
|
# check key validity
|
|
try:
|
|
serialization.load_pem_private_key(bytes(value, "ascii"), password=None)
|
|
except (UnicodeEncodeError, ValueError) as exc:
|
|
raise ValidationError(f'invalid dkim key {bad_key!r}') from exc
|
|
else:
|
|
return value
|
|
|
|
class PasswordField(fields.Str):
|
|
""" Serialize a hashed password hash by stripping the obsolete {SCHEME}
|
|
Deserialize a plain password or hashed password into a hashed password
|
|
"""
|
|
|
|
_hashes = {'PBKDF2', 'BLF-CRYPT', 'SHA512-CRYPT', 'SHA256-CRYPT', 'MD5-CRYPT', 'CRYPT'}
|
|
|
|
def _serialize(self, value, attr, obj, **kwargs):
|
|
""" strip obsolete {password-hash} when serializing """
|
|
# strip scheme spec if in database - it's obsolete
|
|
if value.startswith('{') and (end := value.find('}', 1)) >= 0:
|
|
if value[1:end] in self._hashes:
|
|
return value[end+1:]
|
|
return value
|
|
|
|
def _deserialize(self, value, attr, data, **kwargs):
|
|
""" hashes plain password or checks hashed password
|
|
also strips obsolete {password-hash} when deserializing
|
|
"""
|
|
|
|
# when hashing is requested: use model instance to hash plain password
|
|
if data.get('hash_password'):
|
|
# hash password using model instance
|
|
inst = self.metadata['model']()
|
|
inst.set_password(value)
|
|
value = inst.password
|
|
del inst
|
|
|
|
# strip scheme spec when specified - it's obsolete
|
|
if value.startswith('{') and (end := value.find('}', 1)) >= 0:
|
|
if value[1:end] in self._hashes:
|
|
value = value[end+1:]
|
|
|
|
# check if algorithm is supported
|
|
inst = self.metadata['model'](password=value)
|
|
try:
|
|
# just check against empty string to see if hash is valid
|
|
inst.check_password('')
|
|
except ValueError as exc:
|
|
# ValueError: hash could not be identified
|
|
raise ValidationError(f'invalid password hash {value!r}') from exc
|
|
del inst
|
|
|
|
return value
|
|
|
|
|
|
### base schema ###
|
|
|
|
class Storage:
|
|
""" Storage class to save information in context
|
|
"""
|
|
|
|
context = {}
|
|
|
|
def _bind(self, key, bind):
|
|
if bind is True:
|
|
return (self.__class__, key)
|
|
if isinstance(bind, str):
|
|
return (get_schema(self.recall(bind).__class__), key)
|
|
return (bind, key)
|
|
|
|
def store(self, key, value, bind=None):
|
|
""" store value under key """
|
|
self.context.setdefault('_track', {})[self._bind(key, bind)]= value
|
|
|
|
def recall(self, key, bind=None):
|
|
""" recall value from key """
|
|
return self.context['_track'][self._bind(key, bind)]
|
|
|
|
class BaseOpts(SQLAlchemyAutoSchemaOpts):
|
|
""" Option class with sqla session
|
|
"""
|
|
def __init__(self, meta, ordered=False):
|
|
if not hasattr(meta, 'sqla_session'):
|
|
meta.sqla_session = models.db.session
|
|
if not hasattr(meta, 'sibling'):
|
|
meta.sibling = False
|
|
super(BaseOpts, self).__init__(meta, ordered=ordered)
|
|
|
|
class BaseSchema(ma.SQLAlchemyAutoSchema, Storage):
|
|
""" Marshmallow base schema with custom exclude logic
|
|
and option to hide sqla defaults
|
|
"""
|
|
|
|
OPTIONS_CLASS = BaseOpts
|
|
|
|
class Meta:
|
|
""" Schema config """
|
|
include_by_context = {}
|
|
exclude_by_value = {}
|
|
hide_by_context = {}
|
|
order = []
|
|
sibling = False
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
|
|
# prepare only to auto-include explicitly specified attributes
|
|
only = set(kwargs.get('only') or [])
|
|
|
|
# get context
|
|
context = kwargs.get('context', {})
|
|
flags = {key for key, value in context.items() if value is True}
|
|
|
|
# compile excludes
|
|
exclude = set(kwargs.get('exclude', []))
|
|
|
|
# always exclude
|
|
exclude.update({'created_at', 'updated_at'} - only)
|
|
|
|
# add include_by_context
|
|
if context is not None:
|
|
for need, what in getattr(self.Meta, 'include_by_context', {}).items():
|
|
if not flags & set(need):
|
|
exclude |= what - only
|
|
|
|
# update excludes
|
|
kwargs['exclude'] = exclude
|
|
|
|
# init SQLAlchemyAutoSchema
|
|
super().__init__(*args, **kwargs)
|
|
|
|
# exclude_by_value
|
|
self._exclude_by_value = {
|
|
key: values for key, values in getattr(self.Meta, 'exclude_by_value', {}).items()
|
|
if key not in only
|
|
}
|
|
|
|
# exclude default values
|
|
if not context.get('full'):
|
|
for column in self.opts.model.__table__.columns:
|
|
if column.name not in exclude and column.name not in only:
|
|
self._exclude_by_value.setdefault(column.name, []).append(
|
|
None if column.default is None else column.default.arg
|
|
)
|
|
|
|
# hide by context
|
|
self._hide_by_context = set()
|
|
if context is not None:
|
|
for need, what in getattr(self.Meta, 'hide_by_context', {}).items():
|
|
if not flags & set(need):
|
|
self._hide_by_context |= what - only
|
|
|
|
# remember primary keys
|
|
self._primary = str(self.opts.model.__table__.primary_key.columns.values()[0].name)
|
|
|
|
# determine attribute order
|
|
if hasattr(self.Meta, 'order'):
|
|
# use user-defined order
|
|
order = self.Meta.order
|
|
else:
|
|
# default order is: primary_key + other keys alphabetically
|
|
order = list(sorted(self.fields.keys()))
|
|
if self._primary in order:
|
|
order.remove(self._primary)
|
|
order.insert(0, self._primary)
|
|
|
|
# order fieldlists
|
|
for fieldlist in (self.fields, self.load_fields, self.dump_fields):
|
|
for field in order:
|
|
if field in fieldlist:
|
|
fieldlist[field] = fieldlist.pop(field)
|
|
|
|
# move post_load hook "_add_instance" to the end (after load_instance mixin)
|
|
hooks = self._hooks[('post_load', False)]
|
|
hooks.remove('_add_instance')
|
|
hooks.append('_add_instance')
|
|
|
|
def hide(self, data):
|
|
""" helper method to hide input data for logging """
|
|
# always returns a copy of data
|
|
return {
|
|
key: HIDDEN if key in self._hide_by_context else deepcopy(value)
|
|
for key, value in data.items()
|
|
}
|
|
|
|
def _call_and_store(self, *args, **kwargs):
|
|
""" track current parent field for pruning """
|
|
self.store('field', kwargs['field_name'], True)
|
|
return super()._call_and_store(*args, **kwargs)
|
|
|
|
# this is only needed to work around the declared attr "email" primary key in model
|
|
def get_instance(self, data):
|
|
""" lookup item by defined primary key instead of key(s) from model """
|
|
if self.transient:
|
|
return None
|
|
if keys := getattr(self.Meta, 'primary_keys', None):
|
|
filters = {key: data.get(key) for key in keys}
|
|
if None not in filters.values():
|
|
res= self.session.query(self.opts.model).filter_by(**filters).first()
|
|
return res
|
|
res= super().get_instance(data)
|
|
return res
|
|
|
|
@pre_load(pass_many=True)
|
|
def _patch_many(self, items, many, **kwargs): # pylint: disable=unused-argument
|
|
""" - flush sqla session before serializing a section when requested
|
|
(make sure all objects that could be referred to later are created)
|
|
- when in update mode: patch input data before deserialization
|
|
- handle "prune" and "delete" items
|
|
- replace values in keys starting with '-' with default
|
|
"""
|
|
|
|
# flush sqla session
|
|
if not self.Meta.sibling:
|
|
self.opts.sqla_session.flush()
|
|
|
|
# stop early when not updating
|
|
if not self.context.get('update'):
|
|
return items
|
|
|
|
# patch "delete", "prune" and "default"
|
|
want_prune = []
|
|
def patch(count, data):
|
|
|
|
# don't allow __delete__ coming from input
|
|
if '__delete__' in data:
|
|
raise ValidationError('Unknown field.', f'{count}.__delete__')
|
|
|
|
# fail when hash_password is specified without password
|
|
if 'hash_password' in data and not 'password' in data:
|
|
raise ValidationError(
|
|
'Nothing to hash. Field "password" is missing.',
|
|
field_name = f'{count}.hash_password',
|
|
)
|
|
|
|
# handle "prune list" and "delete item" (-pkey: none and -pkey: id)
|
|
for key in data:
|
|
if key.startswith('-'):
|
|
if key[1:] == self._primary:
|
|
# delete or prune
|
|
if data[key] is None:
|
|
# prune
|
|
want_prune.append(True)
|
|
return None
|
|
# mark item for deletion
|
|
return {key[1:]: data[key], '__delete__': count}
|
|
|
|
# handle "set to default value" (-key: none)
|
|
def set_default(key, value):
|
|
if not key.startswith('-'):
|
|
return (key, value)
|
|
key = key[1:]
|
|
if not key in self.opts.model.__table__.columns:
|
|
return (key, None)
|
|
if value is not None:
|
|
raise ValidationError(
|
|
'Value must be "null" when resetting to default.',
|
|
f'{count}.{key}'
|
|
)
|
|
value = self.opts.model.__table__.columns[key].default
|
|
if value is None:
|
|
raise ValidationError(
|
|
'Field has no default value.',
|
|
f'{count}.{key}'
|
|
)
|
|
return (key, value.arg)
|
|
|
|
return dict(set_default(key, value) for key, value in data.items())
|
|
|
|
# convert items to "delete" and filter "prune" item
|
|
items = [
|
|
item for item in [
|
|
patch(count, item) for count, item in enumerate(items)
|
|
] if item
|
|
]
|
|
|
|
# remember if prune was requested for _prune_items@post_load
|
|
self.store('prune', bool(want_prune), True)
|
|
|
|
# remember original items to stabilize password-changes in _add_instance@post_load
|
|
self.store('original', items, True)
|
|
|
|
return items
|
|
|
|
@pre_load
|
|
def _patch_item(self, data, many, **kwargs): # pylint: disable=unused-argument
|
|
""" - call callback function to track import
|
|
- stabilize import of items with auto-increment primary key
|
|
- delete items
|
|
- delete/prune list attributes
|
|
- add missing required attributes
|
|
"""
|
|
|
|
# callback
|
|
if callback := self.context.get('callback'):
|
|
callback(self, data)
|
|
|
|
# stop early when not updating
|
|
if not self.opts.load_instance or not self.context.get('update'):
|
|
return data
|
|
|
|
# stabilize import of auto-increment primary keys (not required),
|
|
# by matching import data to existing items and setting primary key
|
|
if not self._primary in data:
|
|
for item in getattr(self.recall('parent'), self.recall('field', 'parent')):
|
|
existing = self.dump(item, many=False)
|
|
this = existing.pop(self._primary)
|
|
if data == existing:
|
|
instance = item
|
|
data[self._primary] = this
|
|
break
|
|
|
|
# try to load instance
|
|
instance = self.instance or self.get_instance(data)
|
|
if instance is None:
|
|
|
|
if '__delete__' in data:
|
|
# deletion of non-existent item requested
|
|
raise ValidationError(
|
|
f'Item to delete not found: {data[self._primary]!r}.',
|
|
field_name = f'{data["__delete__"]}.{self._primary}',
|
|
)
|
|
|
|
else:
|
|
|
|
if self.context.get('update'):
|
|
# remember instance as parent for pruning siblings
|
|
if not self.Meta.sibling:
|
|
self.store('parent', instance)
|
|
# delete instance from session when marked
|
|
if '__delete__' in data:
|
|
self.opts.sqla_session.delete(instance)
|
|
# delete item from lists or prune lists
|
|
# currently: domain.alternatives, user.forward_destination,
|
|
# user.manager_of, aliases.destination
|
|
for key, value in data.items():
|
|
if not isinstance(self.fields.get(key), (
|
|
RelatedList, CommaSeparatedListField, fields.Raw)
|
|
) or not isinstance(value, list):
|
|
continue
|
|
# deduplicate new value
|
|
new_value = set(value)
|
|
# handle list pruning
|
|
if '-prune-' in value:
|
|
value.remove('-prune-')
|
|
new_value.remove('-prune-')
|
|
else:
|
|
for old in getattr(instance, key):
|
|
# using str() is okay for now (see above)
|
|
new_value.add(str(old))
|
|
# handle item deletion
|
|
for item in value:
|
|
if item.startswith('-'):
|
|
new_value.remove(item)
|
|
try:
|
|
new_value.remove(item[1:])
|
|
except KeyError as exc:
|
|
raise ValidationError(
|
|
f'Item to delete not found: {item[1:]!r}.',
|
|
field_name=f'?.{key}',
|
|
) from exc
|
|
# sort list of new values
|
|
data[key] = sorted(new_value)
|
|
# log backref modification not caught by modify hook
|
|
if isinstance(self.fields[key], RelatedList):
|
|
if callback := self.context.get('callback'):
|
|
before = {str(v) for v in getattr(instance, key)}
|
|
after = set(data[key])
|
|
if before != after:
|
|
callback(self, instance, {
|
|
'key': key,
|
|
'target': str(instance),
|
|
'before': before,
|
|
'after': after,
|
|
})
|
|
|
|
# add attributes required for validation from db
|
|
for attr_name, field_obj in self.load_fields.items():
|
|
if field_obj.required and attr_name not in data:
|
|
data[attr_name] = getattr(instance, attr_name)
|
|
|
|
return data
|
|
|
|
@post_load(pass_many=True)
|
|
def _prune_items(self, items, many, **kwargs): # pylint: disable=unused-argument
|
|
""" handle list pruning """
|
|
|
|
# stop early when not updating
|
|
if not self.context.get('update'):
|
|
return items
|
|
|
|
# get prune flag from _patch_many@pre_load
|
|
want_prune = self.recall('prune', True)
|
|
|
|
# prune: determine if existing items in db need to be added or marked for deletion
|
|
add_items = False
|
|
del_items = False
|
|
if self.Meta.sibling:
|
|
# parent prunes automatically
|
|
if not want_prune:
|
|
# no prune requested => add old items
|
|
add_items = True
|
|
else:
|
|
# parent does not prune automatically
|
|
if want_prune:
|
|
# prune requested => mark old items for deletion
|
|
del_items = True
|
|
|
|
if add_items or del_items:
|
|
existing = {item[self._primary] for item in items if self._primary in item}
|
|
for item in getattr(self.recall('parent'), self.recall('field', 'parent')):
|
|
key = getattr(item, self._primary)
|
|
if key not in existing:
|
|
if add_items:
|
|
items.append({self._primary: key})
|
|
else:
|
|
items.append({self._primary: key, '__delete__': '?'})
|
|
|
|
return items
|
|
|
|
@post_load
|
|
def _add_instance(self, item, many, **kwargs): # pylint: disable=unused-argument
|
|
""" - undo password change in existing instances when plain password did not change
|
|
- add new instances to sqla session
|
|
"""
|
|
|
|
if not item in self.opts.sqla_session:
|
|
self.opts.sqla_session.add(item)
|
|
return item
|
|
|
|
# stop early when not updating or item has no password attribute
|
|
if not self.context.get('update') or not hasattr(item, 'password'):
|
|
return item
|
|
|
|
# did we hash a new plaintext password?
|
|
original = None
|
|
pkey = getattr(item, self._primary)
|
|
for data in self.recall('original', True):
|
|
if 'hash_password' in data and data.get(self._primary) == pkey:
|
|
original = data['password']
|
|
break
|
|
if original is None:
|
|
# password was hashed by us
|
|
return item
|
|
|
|
# reset hash if plain password matches hash from db
|
|
if attr := getattr(sqlalchemy.inspect(item).attrs, 'password', None):
|
|
if attr.history.has_changes() and attr.history.deleted:
|
|
try:
|
|
# reset password hash
|
|
inst = type(item)(password=attr.history.deleted[-1])
|
|
if inst.check_password(original):
|
|
item.password = inst.password
|
|
except ValueError:
|
|
# hash in db is invalid
|
|
pass
|
|
else:
|
|
del inst
|
|
|
|
return item
|
|
|
|
@post_dump
|
|
def _hide_values(self, data, many, **kwargs): # pylint: disable=unused-argument
|
|
""" hide secrets """
|
|
|
|
# stop early when not excluding/hiding
|
|
if not self._exclude_by_value and not self._hide_by_context:
|
|
return data
|
|
|
|
# exclude or hide values
|
|
full = self.context.get('full')
|
|
return type(data)(
|
|
(key, HIDDEN if key in self._hide_by_context else value)
|
|
for key, value in data.items()
|
|
if full or key not in self._exclude_by_value or value not in self._exclude_by_value[key]
|
|
)
|
|
|
|
# this field is used to mark items for deletion
|
|
mark_delete = fields.Boolean(data_key='__delete__', load_only=True)
|
|
|
|
# TODO: this can be removed when comment is not nullable in model
|
|
comment = LazyStringField()
|
|
|
|
|
|
### schema definitions ###
|
|
|
|
@mapped
|
|
class DomainSchema(BaseSchema):
|
|
""" Marshmallow schema for Domain model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Domain
|
|
load_instance = True
|
|
include_relationships = True
|
|
exclude = ['users', 'managers', 'aliases']
|
|
|
|
include_by_context = {
|
|
('dns',): {'dkim_publickey', 'dns_mx', 'dns_spf', 'dns_dkim', 'dns_dmarc'},
|
|
}
|
|
hide_by_context = {
|
|
('secrets',): {'dkim_key'},
|
|
}
|
|
exclude_by_value = {
|
|
'alternatives': [[]],
|
|
'dkim_key': [None],
|
|
'dkim_publickey': [None],
|
|
'dns_mx': [None],
|
|
'dns_spf': [None],
|
|
'dns_dkim': [None],
|
|
'dns_dmarc': [None],
|
|
}
|
|
|
|
dkim_key = DkimKeyField(allow_none=True)
|
|
dkim_publickey = fields.String(dump_only=True)
|
|
dns_mx = fields.String(dump_only=True)
|
|
dns_spf = fields.String(dump_only=True)
|
|
dns_dkim = fields.String(dump_only=True)
|
|
dns_dmarc = fields.String(dump_only=True)
|
|
|
|
|
|
@mapped
|
|
class TokenSchema(BaseSchema):
|
|
""" Marshmallow schema for Token model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Token
|
|
load_instance = True
|
|
|
|
sibling = True
|
|
|
|
password = PasswordField(required=True, metadata={'model': models.User})
|
|
hash_password = fields.Boolean(load_only=True, missing=False)
|
|
|
|
|
|
@mapped
|
|
class FetchSchema(BaseSchema):
|
|
""" Marshmallow schema for Fetch model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Fetch
|
|
load_instance = True
|
|
|
|
sibling = True
|
|
include_by_context = {
|
|
('full', 'import'): {'last_check', 'error'},
|
|
}
|
|
hide_by_context = {
|
|
('secrets',): {'password'},
|
|
}
|
|
|
|
|
|
@mapped
|
|
class UserSchema(BaseSchema):
|
|
""" Marshmallow schema for User model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.User
|
|
load_instance = True
|
|
include_relationships = True
|
|
exclude = ['_email', 'domain', 'localpart', 'domain_name', 'quota_bytes_used']
|
|
|
|
primary_keys = ['email']
|
|
exclude_by_value = {
|
|
'forward_destination': [[]],
|
|
'tokens': [[]],
|
|
'fetches': [[]],
|
|
'manager_of': [[]],
|
|
'reply_enddate': ['2999-12-31'],
|
|
'reply_startdate': ['1900-01-01'],
|
|
}
|
|
|
|
email = fields.String(required=True)
|
|
tokens = fields.Nested(TokenSchema, many=True)
|
|
fetches = fields.Nested(FetchSchema, many=True)
|
|
|
|
password = PasswordField(required=True, metadata={'model': models.User})
|
|
hash_password = fields.Boolean(load_only=True, missing=False)
|
|
|
|
|
|
@mapped
|
|
class AliasSchema(BaseSchema):
|
|
""" Marshmallow schema for Alias model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Alias
|
|
load_instance = True
|
|
exclude = ['_email', 'domain', 'localpart', 'domain_name']
|
|
|
|
primary_keys = ['email']
|
|
exclude_by_value = {
|
|
'destination': [[]],
|
|
}
|
|
|
|
email = fields.String(required=True)
|
|
destination = CommaSeparatedListField()
|
|
|
|
|
|
@mapped
|
|
class ConfigSchema(BaseSchema):
|
|
""" Marshmallow schema for Config model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Config
|
|
load_instance = True
|
|
|
|
|
|
@mapped
|
|
class RelaySchema(BaseSchema):
|
|
""" Marshmallow schema for Relay model """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.Relay
|
|
load_instance = True
|
|
|
|
|
|
@mapped
|
|
class MailuSchema(Schema, Storage):
|
|
""" Marshmallow schema for complete Mailu config """
|
|
class Meta:
|
|
""" Schema config """
|
|
model = models.MailuConfig
|
|
render_module = RenderYAML
|
|
|
|
order = ['domain', 'user', 'alias', 'relay'] # 'config'
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
# order fieldlists
|
|
for fieldlist in (self.fields, self.load_fields, self.dump_fields):
|
|
for field in self.Meta.order:
|
|
if field in fieldlist:
|
|
fieldlist[field] = fieldlist.pop(field)
|
|
|
|
def _call_and_store(self, *args, **kwargs):
|
|
""" track current parent and field for pruning """
|
|
self.store('field', kwargs['field_name'], True)
|
|
self.store('parent', self.context.get('config'))
|
|
return super()._call_and_store(*args, **kwargs)
|
|
|
|
@pre_load
|
|
def _clear_config(self, data, many, **kwargs): # pylint: disable=unused-argument
|
|
""" create config object in context if missing
|
|
and clear it if requested
|
|
"""
|
|
if 'config' not in self.context:
|
|
self.context['config'] = models.MailuConfig()
|
|
if self.context.get('clear'):
|
|
self.context['config'].clear(
|
|
models = {field.nested.opts.model for field in self.fields.values()}
|
|
)
|
|
return data
|
|
|
|
@post_load
|
|
def _make_config(self, data, many, **kwargs): # pylint: disable=unused-argument
|
|
""" update and return config object """
|
|
config = self.context['config']
|
|
for section in self.Meta.order:
|
|
if section in data:
|
|
config.update(data[section], section)
|
|
|
|
return config
|
|
|
|
domain = fields.Nested(DomainSchema, many=True)
|
|
user = fields.Nested(UserSchema, many=True)
|
|
alias = fields.Nested(AliasSchema, many=True)
|
|
relay = fields.Nested(RelaySchema, many=True)
|
|
# config = fields.Nested(ConfigSchema, many=True)
|