Initial commit of source code and docs

pyquarantine/mailer.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python2
+#
+# PyQuarantine-Milter is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+# 
+# PyQuarantine-Milter is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with PyQuarantineMilter.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import logging
+import smtplib
+import sys
+from multiprocessing import Process, Queue
+
+
+logger = logging.getLogger(__name__)
+queue = Queue(maxsize=50)
+process = None
+
+
+
+def mailprocess():
+    "Mailer process to send emails asynchronously."
+    global logger
+    global queue
+    try:
+        while True:
+            m = queue.get()
+            if not m: break
+            smtp_host, smtp_port, queueid, mailfrom, recipient, mail = m
+            try:
+                s = smtplib.SMTP(host=smtp_host, port=smtp_port)
+                s.sendmail(mailfrom, [recipient], mail)
+            except Exception as e:
+                logger.error("{}: error while sending email to <{}> via {}: {}".format(queueid, recipient, smtp_host, e))
+            else:
+                logger.info("{}: email to <{}> sent successfully".format(queueid, recipient))
+                s.quit()
+    except KeyboardInterrupt:
+        pass
+    logger.debug("mailer process terminated")
+
+
+def sendmail(smtp_host, smtp_port, queueid, mailfrom, recipients, mail):
+    "Send an email."
+    global logger
+    global process
+    global queue
+    if type(recipients) == str:
+        recipients = [recipients]
+    # start mailprocess if it is not started yet
+    if process == None:
+        process = Process(target=mailprocess)
+        process.daemon = True
+        logger.debug("starting mailer process")
+        process.start()
+    for recipient in recipients:
+        queue.put((smtp_host, smtp_port, queueid, mailfrom, recipient, mail))