Add limit and since param

frontend/data.py

@@ -12,6 +12,8 @@ SQLITE_LOCATION = Config.get("Storage", "sqlite_location")
 class Data(Resource):
     def get(self):
         format = request.args['format']
+        limit = request.args.get('limit', 20)
+        since = request.args.get('since', 0)
 
         conn = sqlite3.connect(SQLITE_LOCATION, timeout=60.0)
         cursor = conn.cursor()
@@ -24,7 +26,7 @@ class Data(Resource):
             col_names.append(col_data[i][1])
 
         # Get data from database
-        cursor.execute("SELECT * FROM Events ORDER BY UTCUnixTime DESC, SubSeconds DESC;")
+        cursor.execute("SELECT * FROM Events WHERE UTCUnixTime >= %d ORDER BY UTCUnixTime DESC, SubSeconds DESC LIMIT %d;" % (since, limit))
         data = cursor.fetchall()
         conn.close()