使用requests.post方法向URL上传JSON数据时遇到连接被拒绝错误

hostinfo = {

        'hostname':hostname,

        'ip': ip,

        'osversion': osversion,

        'memory': memory,

        'disk': disk,

        'cpu_core': Cpu_Cores,

    }

    data = json.dumps(hostinfo)

    r = requests.post('http://192.168.2.120/api/report', data=data)

    if r.status_code == 200 and r.cOntent== 'OK':

        print 'ok'

    else:

        print 'fail'

  File "auto_get_info.py", line 92, in

    main()

  File "auto_get_info.py", line 86, in main

    r = requests.post('http://192.168.2.120/api/report', data=data)

  File "/data/requests/api.py", line 108, in post

    return request('post', url, data=data, json=json, **kwargs)

  File "/data/requests/api.py", line 50, in request

    respOnse= session.request(method=method, url=url, **kwargs)

  File "/data/requests/sessions.py", line 464, in request

    resp = self.send(prep, **send_kwargs)

  File "/data/requests/sessions.py", line 576, in send

    r = adapter.send(request, **kwargs)

  File "/data/requests/adapters.py", line 419, in send

    raise ConnectTimeout(e, request=request)

requests.exceptions.ConnectTimeout: HTTPConnectionPool(host='192.168.2.120', port=80): Max retries exceeded with url: /api/report (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',))