ConnectionResetError：[Errno 104]由对等Python 3重置连接

Question

I have a program that queries a REST API (Oanda) and it has been working fine throughout development (about a month or two). The following is how I am requesting my data:

import urllib.request
def getCandles( currency="EUR_USD", count=500, granularity="D"):

    headers = getHeader()
    base_url = 'https://api-fxtrade.oanda.com/'
    ins_url = 'v3/instruments/{}/candles/?count={}&price=M&granularity={}'.format( currency, count, granularity)
    url = base_url + ins_url
    req = urllib.request.Request(url, headers=headers)
    response = urllib.request.urlopen(req)
    response = json.loads( response.decode('utf-8') )
    return response['candles']

I get the following error:

Traceback (most recent call last):
  File "test_indicators.py", line 109, in <module>
    candles = getCandles()
  File "test_indicators.py", line 19, in getCandles
    response = urllib.request.urlopen(url)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 223, in urlopen
    return opener.open(url, data, timeout)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 526, in open
    response = self._open(req, data)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 544, in _open
    '_open', req)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 1361, in https_open
    context=self._context, check_hostname=self._check_hostname)
  File "/home/adam/anaconda3/lib/python3.6/urllib/request.py", line 1321, in do_open
    r = h.getresponse()
  File "/home/adam/anaconda3/lib/python3.6/http/client.py", line 1331, in getresponse
    response.begin()
  File "/home/adam/anaconda3/lib/python3.6/http/client.py", line 297, in begin
    version, status, reason = self._read_status()
  File "/home/adam/anaconda3/lib/python3.6/http/client.py", line 258, in _read_status
    line = str(self.fp.readline(_MAXLINE + 1), "iso-8859-1")
  File "/home/adam/anaconda3/lib/python3.6/socket.py", line 586, in readinto
    return self._sock.recv_into(b)
  File "/home/adam/anaconda3/lib/python3.6/ssl.py", line 1012, in recv_into
    return self.read(nbytes, buffer)
  File "/home/adam/anaconda3/lib/python3.6/ssl.py", line 874, in read
    return self._sslobj.read(len, buffer)
  File "/home/adam/anaconda3/lib/python3.6/ssl.py", line 631, in read
    v = self._sslobj.read(len, buffer)
ConnectionResetError: [Errno 104] Connection reset by peer

I've searched the related questions but couldn't find an answer as a lot of them are using socket module and I am using request. I did seem to get the impression the error was something on my side, however, in writing this question I realized if I query https://www.oanda.com/account/ in my search bar I get a 500, so I am assuming that is what is returned to req. Does this mean the site I am querying has blocked me?

I am well under the request limits (1/sec of the 20/sec they allow), but last night I did exceed the limit of number of data points per request until I found 5000 was the maximum. But it worked fine when I ran it this morning.

Also, I am not spoofing my request as a previous SO answer requested and don't feel I need to as it's an API and has been working fine. In addition, I reset my token authorization on Oanda but still no luck. I guess my question is if this sounds like I have been blocked or is this something I can fix on my end or is it possible Oanda server is just down?

If it helps I am using Django 2.0 and python 3 on linux 16.02.

Thanks, and apologies if I didn't follow SO guidelines as this is my first question asked in quite awhile.

Answer 1

I would suggest you to use requests library in python.For which you can read over here http://docs.python-requests.org/en/master/ . Secondly I tried to make a get request to the URL you had mentioned and i got a 401 - UnAuthorized as the response. The reason being that I do not have the headers. If you want you can use the following piece of code i modified for you.

import requests
def getCandles( currency="EUR_USD", count=500, granularity="D"):

    headers = getHeader()
    base_url = 'https://api-fxtrade.oanda.com/'
    ins_url = 'v3/instruments/{}/candles/?count={}&price=M&granularity={}'.format( currency, count, granularity)
    url = base_url + ins_url
    response = requests.get(url=url, headers=headers)
    if response.status_code == 200:
       return response.json().get('candles')
    else:
        return None

Another thing which can should do is check for the status 200.