203 lines
7.7 KiB
Python
203 lines
7.7 KiB
Python
# PyMod-Milter is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# PyMod-Milter is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with PyMod-Milter. If not, see <http://www.gnu.org/licenses/>.
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#
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__all__ = [
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"ActionConfig",
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"Action"]
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import os
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from pymodmilter import BaseConfig
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from pymodmilter import modify, notify, storage
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from pymodmilter.base import CustomLogger
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from pymodmilter.conditions import ConditionsConfig, Conditions
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class ActionConfig(BaseConfig):
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def __init__(self, idx, rule_cfg, cfg, debug):
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if "name" in cfg:
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assert isinstance(cfg["name"], str), \
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f"{rule_cfg['name']}: Action #{idx}: name: invalid value, " \
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f"should be string"
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cfg["name"] = f"{rule_cfg['name']}: {cfg['name']}"
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else:
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cfg["name"] = f"{rule_cfg['name']}: Action #{idx}"
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if "loglevel" not in cfg:
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cfg["loglevel"] = rule_cfg["loglevel"]
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super().__init__(cfg, debug)
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self["pretend"] = rule_cfg["pretend"]
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self["conditions"] = None
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self["type"] = ""
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if "pretend" in cfg:
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pretend = cfg["pretend"]
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assert isinstance(pretend, bool), \
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f"{self['name']}: pretend: invalid value, should be bool"
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self["pretend"] = pretend
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assert "type" in cfg, \
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f"{self['name']}: mandatory parameter 'type' not found"
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assert isinstance(cfg["type"], str), \
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f"{self['name']}: type: invalid value, should be string"
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self["type"] = cfg["type"]
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if self["type"] == "add_header":
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self["class"] = modify.AddHeader
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self["headersonly"] = True
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self.add_string_arg(cfg, ["field", "value"])
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elif self["type"] == "mod_header":
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self["class"] = modify.ModHeader
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self["headersonly"] = True
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args = ["field", "value"]
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if "search" in cfg:
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args.append("search")
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self.add_string_arg(cfg, args)
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elif self["type"] == "del_header":
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self["class"] = modify.DelHeader
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self["headersonly"] = True
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args = ["field"]
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if "value" in cfg:
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args.append("value")
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self.add_string_arg(cfg, args)
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elif self["type"] == "add_disclaimer":
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self["class"] = modify.AddDisclaimer
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self["headersonly"] = False
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if "error_policy" not in cfg:
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cfg["error_policy"] = "wrap"
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self.add_string_arg(
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cfg, ["action", "html_template", "text_template",
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"error_policy"])
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assert self["args"]["action"] in ["append", "prepend"], \
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f"{self['name']}: action: invalid value, " \
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f"should be 'append' or 'prepend'"
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assert self["args"]["error_policy"] in ("wrap",
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"ignore",
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"reject"), \
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f"{self['name']}: error_policy: invalid value, " \
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f"should be 'wrap', 'ignore' or 'reject'"
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elif self["type"] == "rewrite_links":
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self["class"] = modify.RewriteLinks
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self["headersonly"] = False
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self.add_string_arg(cfg, "repl")
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elif self["type"] == "store":
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self["headersonly"] = False
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assert "storage_type" in cfg, \
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f"{self['name']}: mandatory parameter 'storage_type' not found"
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assert isinstance(cfg["type"], str), \
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f"{self['name']}: storage_type: invalid value, " \
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f"should be string"
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self["storage_type"] = cfg["storage_type"]
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if "original" in cfg:
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self.add_bool_arg(cfg, "original")
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if self["storage_type"] == "file":
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self["class"] = storage.FileMailStorage
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self.add_string_arg(cfg, "directory")
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# check if directory exists and is writable
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if not os.path.isdir(self["args"]["directory"]) or \
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not os.access(self["args"]["directory"], os.W_OK):
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raise RuntimeError(
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f"{self['name']}: file quarantine directory "
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f"'{self['directory']}' does not exist or is "
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f"not writable")
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if "skip_metadata" in cfg:
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self.add_bool_arg(cfg, "skip_metadata")
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if "metavar" in cfg:
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self.add_string_arg(cfg, "metavar")
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else:
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raise RuntimeError(
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f"{self['name']}: storage_type: invalid storage type")
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elif self["type"] == "notify":
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self["headersonly"] = False
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self["class"] = notify.EMailNotification
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args = ["smtp_host", "envelope_from", "from_header", "subject",
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"template"]
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if "repl_img" in cfg:
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args.append("repl_img")
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self.add_string_arg(cfg, args)
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self.add_int_arg(cfg, "smtp_port")
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if "embed_imgs" in cfg:
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assert isinstance(cfg["embed_imgs"], list), \
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f"{self['name']}: embed_imgs: invalid value, " \
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f"should be list"
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for img in cfg["embed_imgs"]:
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assert isinstance(img, str), \
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f"{self['name']}: embed_imgs: invalid entry, " \
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f"should be string"
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self["args"]["embed_imgs"] = cfg["embed_imgs"]
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else:
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raise RuntimeError(f"{self['name']}: type: invalid action type")
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if "conditions" in cfg:
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conditions = cfg["conditions"]
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assert isinstance(conditions, dict), \
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f"{self['name']}: conditions: invalid value, should be dict"
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self["conditions"] = ConditionsConfig(self, conditions, debug)
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self.logger.debug(f"pretend={self['pretend']}, "
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f"loglevel={self['loglevel']}, "
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f"type={self['type']}, "
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f"args={self['args']}")
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class Action:
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"""Action to implement a pre-configured action to perform on e-mails."""
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def __init__(self, milter_cfg, cfg):
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if cfg["conditions"] is None:
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self.conditions = None
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else:
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self.conditions = Conditions(milter_cfg, cfg["conditions"])
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self.pretend = cfg["pretend"]
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self._name = cfg["name"]
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self._class = cfg["class"](**cfg["args"])
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self._headersonly = cfg["headersonly"]
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self.logger = cfg.logger
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def headersonly(self):
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"""Return the needs of this action."""
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return self._headersonly
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def execute(self, milter):
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"""Execute configured action."""
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logger = CustomLogger(
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self.logger, {"qid": milter.qid, "name": self._name})
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if self.conditions is None or \
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self.conditions.match(envfrom=milter.mailfrom,
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envto=[*milter.rcpts],
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headers=milter.msg.items(),
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qid=milter.qid):
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return self._class.execute(
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milter=milter, pretend=self.pretend, logger=logger)
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