亚马逊MWS错误SignatureDoesNotMatch（蟒蛇）

目前我越来越想请求提交到亚马逊的市场WebService时，出现以下错误：亚马逊MWS错误SignatureDoesNotMatch（蟒蛇）

The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details. 62baed22-cc14-49bd-bf34-c1eb10bc4019

代码：

import sys, os, base64, datetime, hashlib, hmac, urllib 
from time import gmtime, strftime 
from requests import request 
import urllib.parse 
import urllib.request 
import dateutil.parser 

def get_timestamp(): 
    time = strftime("%Y-%m-%dT%H:%M:%SZ", gmtime()) 
    return dateutil.parser.parse(time) 

def calc_signature(method, domain, URI, request_description, key): 
    sig_data = method + '\n' + \ 
     domain.lower() + '\n' + \ 
     URI + '\n' + \ 
     request_description 

    hmac_obj = hmac.new(key.encode(), sig_data.encode(), hashlib.sha256) 
    digest = hmac_obj.digest() 

    return urllib.parse.quote(base64.b64encode(digest), safe='-_+=/.~') 

SECRET_KEY = 'XXXXXXXX' 
AWS_ACCESS_KEY = 'XXXXXXXX' 
SELLER_ID = 'XXXXXXXX' 
MARKETPLACE_ID = 'XXXXXXXX' 
MWS_AUTH_TOKEN = 'XXXXXXXXXXX' 

Action = 'GetLowestPricedOffersForASIN' 
SignatureMethod = 'HmacSHA256' 
SignatureVersion = '2' 
Timestamp = get_timestamp() 
Version = '2011-10-01' 
CreatedAfter = '2011-10-01T23:00:57Z' 
URI = '/Products/2011-10-01' 
domain = 'mws.amazonservices.com' 
proto = 'https://' 
method = 'POST' 
ASIN = 'B004KZQVF4' 
itemcondition = 'New' 

payload = { 
    'AWSAccessKeyId': AWS_ACCESS_KEY, 
    'Action': Action, 
    'SellerId': SELLER_ID, 
    'MWSAuthToken': MWS_AUTH_TOKEN, 
    'SignatureVersion': SignatureVersion, 
    'Timestamp': '2016-01-08T05%3A32%3A48Z', 
    'Version': Version, 
    'SignatureMethod': SignatureMethod, 
    'CreatedAfter': CreatedAfter, 
    'MarketplaceId.Id.1': MARKETPLACE_ID, 
    'ASIN': ASIN, 
    'ItemCondition': itemcondition 
} 

request_description = '&'.join(['%s=%s' % (k, urllib.parse.quote(payload[k], safe='-_+=/.~').encode('utf-8')) for k in sorted(payload)]) 

sig = calc_signature(method, domain, URI, request_description, SECRET_KEY) 

url = '%s%s?%s&Signature=%s' % \ 
    (proto+domain, URI, request_description, urllib.parse.quote(sig)) 

headers = { 
    'Host': domain, 
    'Content-Type': 'text/xml', 
    'x-amazon-user-agent': 'python-requests/1.2.0 (Language=Python)' 
} 

response = request(method, url, headers=headers)

URL输出：

https://mws.amazonservices.com/Products/2011-10-01?ASIN=XXXXXXX&AWSAccessKeyId=XXXXXXX&Action=GetLowestPricedOffersForASIN&CreatedAfter=2014-08-26T23%3A00%3A57Z&ItemCondition=New&MWSAuthToken=XXXXXXX&MarketplaceId.Id.1=XXXXXXX&SellerId=XXXXXXX&SignatureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2016-01-13T21%3A08%3A57Z&Version=2013-09-01&Signature=hwooJu0FeDs3j26mEUN8of5buSI/QsgY54kVCUsAirw%3D

显然，如何生成签名有问题，但我无法缩小确切的原因。

来源

2016-01-13 Scribble_Scratch

嗯，我想通了。只需将方法从'POST'更改为'GET'即可。

多年来一直与此战斗 - 数字它会是那么简单！

来源

2016-01-13 21:55:07

可能对未来有所帮助... Python类可以做到这一点。 https://github.com/amzn/login-and-pay-with-amazon-sdk-python/blob/master/pay_with_amazon/payment_request.py –

亚马逊MWS错误SignatureDoesNotMatch（蟒蛇）

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