improve conditions handling

pymodmilter/__init__.py

@@ -199,6 +199,33 @@ class ModifyMilter(Milter.Base):
             self.logger.debug(
                 f"accepted milter connection from {self.IP} "
                 f"port {self.port}")
+
+            # pre-filter rules and actions by the host condition
+            # also check if the mail body is needed by any upcoming action.
+            self.rules = []
+            self._headersonly = True
+            for rule in ModifyMilter._rules:
+                if rule.conditions is None or \
+                        rule.conditions.match_host(self.IP):
+                    actions = []
+                    for action in rule.actions:
+                        if action.conditions is None or \
+                                action.conditions.match_host(self.IP):
+                            actions.append(action)
+                            if not action.headersonly():
+                                self._headersonly = False
+
+                    if actions:
+                        # copy needed rules to preserve configured actions
+                        rule = copy(rule)
+                        rule.actions = actions
+                        self.rules.append(rule)
+
+            if not self.rules:
+                self.logger.debug(
+                    "host is ignored by all rules, skip further processing")
+                return Milter.ACCEPT
+
         except Exception as e:
             self.logger.exception(
                 f"an exception occured in connect method: {e}")
@@ -244,37 +271,6 @@ class ModifyMilter(Milter.Base):
             self.logger = CustomLogger(
                 self.logger, {"qid": self.qid, "name": "milter"})
             self.logger.debug("received queue-id from MTA")
-
-            # pre-filter rules and actions by the host condition, other
-            # conditions (headers, envelope-from, envelope-to) may get
-            # changed by executed actions later on.
-            # also check if the mail body is needed by any upcoming action.
-
-            self.rules = []
-            self._headersonly = True
-            for rule in ModifyMilter._rules:
-                if rule.conditions is None or \
-                        rule.conditions.match(host=self.IP, qid=self.qid):
-                    actions = []
-                    for action in rule.actions:
-                        if action.conditions is None or \
-                                action.conditions.match(host=self.IP,
-                                                        qid=self.qid):
-                            actions.append(action)
-                            if not action.headersonly():
-                                self._headersonly = False
-
-                    if actions:
-                        # copy needed rules to preserve configured actions
-                        rule = copy(rule)
-                        rule.actions = actions
-                        self.rules.append(rule)
-
-            if not self.rules:
-                self.logger.debug(
-                    "message is ignored by all rules, skip further processing")
-                return Milter.ACCEPT
-
             self.fp = BytesIO()
         except Exception as e:
             self.logger.exception(
@@ -341,7 +337,7 @@ class ModifyMilter(Milter.Base):
                     refold_source='none'))
             self.msginfo = {
                 "mailfrom": self.mailfrom,
-                "rcpts": self.rcpts,
+                "rcpts": [*self.rcpts],
                 "vars": {}}
 
             self._replacebody = False
@@ -356,7 +352,7 @@ class ModifyMilter(Milter.Base):
             if self._replacebody:
                 data = self.msg.as_bytes()
                 body_pos = data.find(b"\r\n\r\n") + 4
-                self.logger.debug("replacebody")
+                self.logger.debug("replace body")
                 super().replacebody(data[body_pos:])
                 del data
 

pymodmilter/action.py

@@ -194,9 +194,6 @@ class Action:
         logger = CustomLogger(
             self.logger, {"qid": milter.qid, "name": self._name})
         if self.conditions is None or \
-                self.conditions.match(envfrom=milter.mailfrom,
-                                      envto=[*milter.rcpts],
-                                      headers=milter.msg.items(),
-                                      qid=milter.qid):
+                self.conditions.match(milter):
             return self._class.execute(
                 milter=milter, pretend=self.pretend, logger=logger)

pymodmilter/conditions.py

@@ -81,15 +81,10 @@ class Conditions:
         self._args = cfg["args"]
         self.logger = cfg.logger
 
-    def match(self, host=None, envfrom=None, envto=None, headers=None,
-              qid=None):
-        if qid is None:
-            logger = self.logger
-        else:
+    def match_host(self, host):
         logger = CustomLogger(
-                self.logger, {"qid": qid, "name": self._name})
+            self.logger, {"name": self._name})
 
-        if host:
         ip = IPAddress(host)
 
         if "local" in self._args:
@@ -124,6 +119,13 @@ class Conditions:
             logger.debug(
                 f"condition hosts matches for host {host}")
 
+        return True
+
+    def match(self, milter):
+        logger = CustomLogger(
+            self.logger, {"qid": milter.qid, "name": self._name})
+
+        envfrom = milter.msginfo["mailfrom"]
         if envfrom and "envfrom" in self._args:
             if not self._args["envfrom"].match(envfrom):
                 logger.debug(
@@ -135,6 +137,7 @@ class Conditions:
                 f"condition envfrom matches for "
                 f"envelope-from address {envfrom}")
 
+        envto = milter.msginfo["rcpts"]
         if envto and "envto" in self._args:
             if not isinstance(envto, list):
                 envto = [envto]
@@ -150,9 +153,9 @@ class Conditions:
                 f"condition envto matches for "
                 f"envelope-to address {envto}")
 
-        if headers and "header" in self._args:
+        if "header" in self._args:
             match = None
-            for field, value in headers:
+            for field, value in milter.msg.items():
                 header = f"{field}: {value}"
                 match = self._args["header"].search(header)
                 if match:

pymodmilter/rule.py

@@ -86,10 +86,7 @@ class Rule:
     def execute(self, milter):
         """Execute all actions of this rule."""
         if self.conditions is None or \
-                self.conditions.match(envfrom=milter.mailfrom,
-                                      envto=[*milter.rcpts],
-                                      headers=milter.msg.items(),
-                                      qid=milter.qid):
+                self.conditions.match(milter):
             for action in self.actions:
                 milter_action = action.execute(milter)
                 if milter_action is not None: