first version?

api1.py

@@ -1,12 +1,18 @@
 import flask
+import sys
 from flask import request, jsonify, g
 from flask_apscheduler import APScheduler
 from datetime import datetime,timedelta,timezone
 import sqlite3
+import smtplib
 
+# testing:
+# start dummy web server for dev with root: python3 -m smtpd -c DebuggingServer -n localhost:25
+
+# Request:
+# curl -X POST "http://localhost:5000/api/v1?topic=abc.def&secs=60&email=j.tretter@gmail.com"
 DATABASE='deadswitch.sqlite3'
 
-
 class Config(object):
     JOBS = [
         {
@@ -19,18 +25,33 @@ class Config(object):
 
     SCHEDULER_API_ENABLED = True
 
+def sendMail(topic,toAddr):
+    print(f"sending mail to {toAddr} for topic {topic}")
+    port = 25
+    server=smtplib.SMTP("localhost", port)
+    sender_email = "deadswitch@kawomi.com"
+    receiver_email = "joerg.tretter@gmail.com"
+    message = f"""\
+    Subject: deadSwitch not pushed on topic {topic}
+
+    Notification of deadSwitch not pushed on topic {topic}."""
+    server.sendmail(sender_email, receiver_email, message)
+
 
 def expiryCheck():
-    print('LA ')
+    print('.',end='')
     db=sqlite3.connect(DATABASE,detect_types=sqlite3.PARSE_DECLTYPES)
     cursor = db.cursor()
-    for theRow in cursor.execute("select expiry,topic from entries where expiry < datetime()"):
+    for theRow in cursor.execute("select expiry,topic,email from entries where active=True and isNotified=False and expiry < datetime()"):
         print(theRow)
+        sendMail(theRow[1],theRow[2])
+        db.execute("update entries set isNotified=True where topic=?",[theRow[1]])
+        db.commit()
     db.close()
 
 if __name__ == '__main__':
     app = flask.Flask(__name__)
-    app.config["DEBUG"] = True
+    app.config["DEBUG"] = False
 
     app.config.from_object(Config())
     scheduler = APScheduler()
@@ -54,7 +75,15 @@ if __name__ == '__main__':
 
     @app.route('/', methods=['GET'])
     def home():
-        return "<h1>Hello</h1>"
+        return """<h1>Dead-Switch web service</h1>
+        <hr>
+        <h2>2020-10-29 - j.tretter@gmail.com</h2>
+        <hr>
+        Examples:
+        <ul>
+        <li>curl "https://deadswitch.kawomi.com/api/v1?topic=sys.demo"</li>
+        <li>curl -X POST "https://deadswitch.kawomi.com/api/v1?topic=sys.demo&secs=60&email=demo@gmail.com"</li>
+        </ul>"""
 
 
     @app.route('/api/v1', methods=['GET'])
@@ -62,33 +91,43 @@ if __name__ == '__main__':
         if 'topic' in request.args:
             topic=request.args['topic']
         else:
-            return "Error: need topic"
+            return jsonify({'success':False, 'error':"No topic given"})
 
         cursor = get_db().cursor()
-        cursor.execute("select expiry from entries where topic=?",[topic])
-        expdatetime=cursor.fetchone()[0]
+        cursor.execute("select active,expiry,email,isNotified,expiry<datetime('now') \"isExpired\",lastSeen from entries where topic=?",[topic])
+        theRow=cursor.fetchone()
+        if theRow is None:
+            return jsonify({'success':False, 'error':f"No entry found for topic _{topic}_"})
 
-        return "<h1>GET</h1>" + topic + ": " + expdatetime.strftime("%Y-%m-%d %H:%M:%S")
+        return jsonify({'success':True, 'topic':topic, 'active':theRow[0], 'expiry':theRow[1].strftime("%Y-%m-%d %H:%M:%S"), 'lastSeen':theRow[5].strftime("%Y-%m-%d %H:%M:%S"),'isExpired':theRow[4],'email':theRow[2], 'isNotified':theRow[3]})
 
     @app.route('/api/v1', methods=['PUT','POST'])
     def api_setRecord():
         if 'topic' in request.args:
             topic = request.args['topic']
         else:
-            return "Error: need topic"
+            return jsonify({'success':False, 'error':"No topic given"})
+
+        if 'email' in request.args:
+            email = request.args['email']
+        else:
+            return jsonify({'success':False, 'error':"No email given"})
 
         if 'secs' in request.args:
             secs = int(request.args['secs'])
         else:
-            return "Errof: need secs"
+            return jsonify({'success':False, 'error':"No secs given"})
 
         expiryDateTime=datetime.now(tz=timezone.utc) + timedelta(seconds=secs)
         
+        try:
             cursor = get_db().cursor()
-        cursor.execute("update entries set expiry=? where topic=?",[expiryDateTime,topic])
+            cursor.execute("update entries set active=True,isNotified=False,email=?,expiry=?,lastSeen=datetime('now') where topic=?",[email,expiryDateTime,topic])
             if cursor.rowcount == 0:
-            cursor.execute("Insert into entries (topic,expiry) values (?,?)",[topic,expiryDateTime])
+                cursor.execute("Insert into entries (active,topic,expiry,email,isNotified,lastSeen) values (True,?,?,?,False,datetime('now'))",[topic,expiryDateTime,email])
+        except Exception as e:
+            return jsonify({'success':False, 'error':str(e)})
 
-        return "<h1>SET</h1>" + expiryDateTime.strftime("%Y-%m-%d %H:%M:%S")
+        return jsonify({'success':True, 'expiry':expiryDateTime.strftime("%Y-%m-%d %H:%M:%S"), 'email':email})
 
     app.run(use_reloader=False)

createDB.sql

@@ -0,0 +1 @@
+CREATE TABLE entries (active boolean,topic string,email string, expiry timestamp, isNotified boolean, lastSeen timestamp);

mail.py

@@ -1,7 +1,6 @@
 import smtplib
 
 port = 25
-
 server=smtplib.SMTP("localhost", port)
 sender_email = "deadswitch@kawomi.com"
 receiver_email = "joerg.tretter@gmail.com"