"Connection refused" 使用本地域名的烧瓶

Question

我在我的 Raspi 上的守护进程中安装了烧瓶运行ning。

@app.route("/cmd",methods = ['POST', 'GET'])
def cmd():
    if request.method == 'GET':
        order_obj = request.args.to_dict(flat=True)
    else:
        order_obj = request.get_json(force=True)
    response = jsonify(controller_obj.act_on_order(order_obj))
    response.headers.add('Access-Control-Allow-Origin', '*')
    return response

app.run(port=8087, debug=config.DEBUG, use_reloader=False)

当我运行这个应用程序时，我可以看到它正在侦听端口 8087:

pi@brs-tv:~/brs $ sudo netstat -lptu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name               
tcp        0      0 localhost:8087          0.0.0.0:*               LISTEN      4133/python

当我使用本地主机远程登录到本地端口时，它工作正常。

pi@brs-tv:~/brs $ telnet localhost 8087
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /cmd

但是当我本地 telnet 到它的本地地址时，我得到连接被拒绝：

pi@brs-tv:~/brs $ telnet brs-tv.local 8087
Trying 127.0.1.1...
telnet: Unable to connect to remote host: Connection refused

这是 Rpi 的东西，还是 Flask 的东西？

Answer 1

原来是Flask的东西

host (Optional[str]) – the hostname to listen on. Set this to '0.0.0.0' to have the server available externally as well. Defaults to '127.0.0.1' or the host in the SERVER_NAME config variable if present.

所以，修复我的 Flask 运行调用：

app.run(host="0.0.0.0", port=config.CONTROLLERS[whoami]["port"], 
        debug=config.DEBUG, use_reloader=False)

现在，我的端口正在监听世界其他地方：

pi@brs-tv:~ $ sudo netstat -lptu
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:8087            0.0.0.0:*               LISTEN      1213/python

我现在也可以从另一台机器连接：

Ricos-vt220:~ % telnet brs-tv.local 8087
Trying fe80::3d7:b64:bb26:14e0...
telnet: connect to address fe80::3d7:b64:bb26:14e0: Connection refused
Trying 192.168.86.29...
Connected to brs-tv.local.
Escape character is '^]'.
GET /cmd

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