handle CORS header, only basic implementation for get.

api1.py

@@ -1,6 +1,6 @@
 import flask
 import sys
-from flask import request, jsonify, g
+from flask import request, jsonify, g, make_response
 from flask_apscheduler import APScheduler
 from datetime import datetime,timedelta,timezone
 import sqlite3
@@ -88,6 +88,14 @@ if __name__ == '__main__':
         </ul>"""
 
 
+    @app.route('/api/v1', methods=['OPTIONS'])
+    def api_returnOptions():
+        response = make_response()
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        response.headers.add('Access-Control-Allow-Headers', "*")
+        response.headers.add('Access-Control-Allow-Methods', "*")
+        return response
+
     @app.route('/api/v1', methods=['GET'])
     def api_getByTopic():
         if 'topic' in request.args:
@@ -101,7 +109,7 @@ if __name__ == '__main__':
         if theRow is None:
             return jsonify({'success':False, 'error':f"No entry found for topic _{topic}_"})
 
-        return jsonify({'success':True, 'topic':topic, 'active':bool(theRow[0]), 'expiry':theRow[1].strftime("%Y-%m-%d %H:%M:%S"), 'lastSeen':theRow[5].strftime("%Y-%m-%d %H:%M:%S"),'isExpired':bool(theRow[4]),'email':theRow[2], 'isNotified':bool(theRow[3])})
+        return _corsify_actual_response(jsonify({'success':True, 'topic':topic, 'active':bool(theRow[0]), 'expiry':theRow[1].strftime("%Y-%m-%d %H:%M:%S"), 'lastSeen':theRow[5].strftime("%Y-%m-%d %H:%M:%S"),'isExpired':bool(theRow[4]),'email':theRow[2], 'isNotified':bool(theRow[3])}))
 
     @app.route('/api/v1', methods=['PUT','POST'])
     def api_setRecord():
@@ -132,4 +140,8 @@ if __name__ == '__main__':
 
         return jsonify({'success':True, 'expiry':expiryDateTime.strftime("%Y-%m-%d %H:%M:%S"), 'email':email})
 
+    def _corsify_actual_response(response):
+        response.headers.add("Access-Control-Allow-Origin", "*")
+        return response
+
     app.run(use_reloader=False,port=5123)