65 lines
1.5 KiB
Python
65 lines
1.5 KiB
Python
import tornado.websocket
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import json
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# This is our WebSocketHandler - it handles the messages
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# from the tornado server
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class WebSocketHandler(tornado.websocket.WebSocketHandler):
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connections = set()
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def initialize(self, conn):
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"""
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conn: sqlite3 connection
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"""
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self.conn = conn
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# the client connected
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def open(self):
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self.connections.add(self)
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print ("New client connected")
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# the client sent the message
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def on_message(self, message):
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# {"rate":"77*", "count":"4", "time":"14.44"}
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try:
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beat = json.loads(message)
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except Exception as e:
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print("Probably no valid JSON")
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[con.write_message(message) for con in self.connections]
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return False
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if beat['rate'].endswith('*'):
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beat['rate'] = beat['rate'][:-1]
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beat['rate'] = beat['rate'].strip()
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if beat['count'].endswith('*'):
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beat['count'] = beat['count'][:-1]
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beat['count'] = beat['count'].strip()
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if beat['time'].endswith('*'):
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beat['time'] = beat['time'][:-1]
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beat['time'] = beat['time'].strip()
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c = self.conn.cursor()
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c.execute("""
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INSERT INTO beats (bpm,beatcount,beattime)
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VALUES (:rate, :count, :time)
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""", beat)
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insertid = c.lastrowid
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self.conn.commit()
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c.execute("SELECT createdAt FROM beats WHERE id = ?", (insertid,))
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now = c.fetchone()[0]
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beat['bpm'] = int(beat['rate'])
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beat['timestamp'] = now
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# actively close connection :-)
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[con.write_message(json.dumps(beat)) for con in self.connections]
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self.close()
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# client disconnected
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def on_close(self):
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self.connections.remove(self)
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print ("Client disconnected")
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