Finishing up the alert consumer and producer

I think...

sylvilagus/python/sylvilagus/ch04/alert_consumer.py

@@ -12,8 +12,8 @@ AMQP_USER = 'alert_user'
 AMQP_PASS = 'alertme'
 AMQP_VHOST = '/'
 AMQP_EXCHANGE = 'alerts'
-OPS_EMAILS = ['daniel.buch+sylvilagus-alerts-ops@gmail.com']
-ADMIN_EMAILS = ['daniel.buch+sylvilagus-alerts-admin@gmail.com']
+OPS_EMAILS = ['me@localhost']
+ADMIN_EMAILS = ['me@localhost']
 
 
 def main():
@@ -61,7 +61,7 @@ def send_mail(recipients, subject, message):
         'To: ',
         'Date: ',
         'Subject: {}'.format(subject)
-    ]) + '\r\n'
+    ]) + '\r\n\r\n'
     smtp_server = smtplib.SMTP()
     smtp_server.connect('localhost', 25)
     smtp_server.sendmail('alerts@sylvilagus.local',

sylvilagus/python/sylvilagus/ch04/alert_producer.py

@@ -0,0 +1,51 @@
+from __future__ import print_function
+
+import json
+import sys
+
+import pika
+
+from argparse import ArgumentParser
+
+
+def main(sysargs=sys.argv[:]):
+    parser = ArgumentParser()
+    parser.add_argument('-r',
+                        '--routing-key',
+                        help='Routing key for message (e.g. myalert.im)')
+    parser.add_argument('-m',
+                        '--message',
+                        help='Message text for alert.')
+
+    args = parser.parse_args(sysargs[1:])
+
+    creds_broker = pika.PlainCredentials('alert_user', 'alertme')
+    conn_params = pika.ConnectionParameters('localhost',
+                                            virtual_host='/',
+                                            credentials=creds_broker)
+    conn_broker = pika.BlockingConnection(conn_params)
+
+    channel = conn_broker.channel()
+
+    msg = json.dumps({'message': args.message})
+    msg_props = pika.BasicProperties()
+    msg_props.content_type = 'application/json'
+    msg_props.durable = False
+
+    channel.basic_publish(body=msg,
+                          exchange='alerts',
+                          properties=msg_props,
+                          routing_key=args.routing_key)
+
+    print(
+        ('Sent message {} tagged with routing key {!r} to ' +
+         'exchange "alerts" on vhost "/".').format(msg, args.routing_key)
+    )
+
+    conn_broker.close()
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())