Question

我一直在外汇提供商（OANDA）的练习帐户中构建我自己的python（版本3.2.1）交易应用程序，但我在使用基于Linux debian的操作系统接收流媒体价格方面存在一些问题。

特别是，我遵循了他们的“Python流媒体费率”指南：http://developer.oanda.com/rest-live/sample-code/。

我有一个调用函数'connect_to_stream'的线程，它打印出从服务器收到的所有滴答：

streaming_thread = threading.Thread(target=streaming.connect_to_stream, args=[])
streaming_thread.start()

streaming.connect_to_stream函数定义如下：

def connect_to_stream():  

   [..]#provider-related info are passed here

    try:
        s = requests.Session()
        url = "https://" + domain + "/v1/prices"
        headers = {'Authorization' : 'Bearer ' + access_token,
                   'Connection' : 'keep-alive'
                  }
        params = {'instruments' : instruments, 'accountId' : account_id}
        req = requests.Request('GET', url, headers = headers, params = params)
        pre = req.prepare()
        resp = s.send(pre, stream = True, verify = False)
        return resp
    except Exception as e:
        s.close()
        print ("Caught exception when connecting to stream\n%s" % str(e))

    if response.status_code != 200:
            print (response.text)
            return
    for line in response.iter_lines(1):
        if line:
            try:
                msg = json.loads(line)
                print(msg)
            except Exception as e:
                print ("Caught exception when connecting to stream\n%s" % str(e))
                return

msg变量包含为流媒体收到的标记。

问题是我平均收到三个小时的滴答声，之后连接被删除，脚本挂起而没有收到任何滴答声或抛出异常，理由是“连接重置为对等”。

请您分享一下我在哪里出错的想法吗？是否与请求库有关（iter_lines可能）？

除非引发键盘异常，否则我希望无限期地收到刻度。

由于

Answer 1

对我来说这似乎并不太奇怪，一项服务会关闭生活超过3小时的连接。

这可能是他们的安全，以确保从鬼客户端释放他们的服务器套接字。

因此，您可能只是在断开连接时重新连接。

try:
    s = requests.Session()
    url = "https://" + domain + "/v1/prices"
    headers = {'Authorization' : 'Bearer ' + access_token,
               'Connection' : 'keep-alive'
              }
    params = {'instruments' : instruments, 'accountId' : account_id}
    req = requests.Request('GET', url, headers = headers, params = params)
    pre = req.prepare()
    resp = s.send(pre, stream = True, verify = False)
    return resp
except SocketError as e:
    if e.errno == errno.ECONNRESET:
        pass # connection has been reset, reconnect.
except Exception as e:
    pass # other exceptions but you'll probably need to reconnect too.

Python - 请求模块 - 接收流更新 - 由同行重置连接

1 个答案: