Question

我正在尝试运行类似于此问题中的代码：How do I sign a POST request using HMAC-SHA512 and the Python requests library?

我有以下代码：

import requests
import hmac
import hashlib
from itertools import count
import time

headers = { 'nonce': '',
        'Key' : 'myKey',
        'Sign': '',}
payload = { 'command': 'returnCompleteBalances',
            'account': 'all'}
secret = 'mySecret'

NONCE_COUNTER = count(int(time.time() * 1000))
headers['nonce'] = next(NONCE_COUNTER)

request = requests.Request(
    'POST', 'https://poloniex.com/tradingApi',
    params=payload, headers=headers)
signature = hmac.new(secret, request.body, digestmod=hashlib.sha512)
request.headers['Sign'] = signature.hexdigest()

with requests.Session() as session:
    response = session.send(request)

以下一行：

signature = hmac.new(secret, request.body, digestmod=hashlib.sha512)

引发此错误：'Request'对象没有属性'body'

Answer 1

您的源代码有几个问题：

对于POST方法，您不能使用参数params，但需要参数data。
如前所述，您需要.prepare()方法。
参数nonce也需要在payload中指定，而不是在headers中指定。

这应该有效：

import requests
import hmac
import hashlib
from itertools import count
import time

NONCE_COUNTER = count(int(time.time() * 1000))

headers = { 'Key' : 'myKey',
            'Sign': '',}

payload = { 'nonce': next(NONCE_COUNTER),
            'command': 'returnCompleteBalances',
            'account': 'all'}

secret = 'mySecret'


request = requests.Request(
    'POST', 'https://poloniex.com/tradingApi',
    data=payload, headers=headers).prepare()
signature = hmac.new(secret, request.body, digestmod=hashlib.sha512)
request.headers['Sign'] = signature.hexdigest()


with requests.Session() as session:
    response = session.send(request)

Python请求，没有属性'body'

1 个答案: