amazon-gift-card.py

"""
Amazon Gift Card

官网网页测试地址：
https://s3.amazonaws.com/AGCOD/htmlSDKv2/htmlSDKv2_NAEUFE/index.html
可对参数进行逐一对照。

官网API文档：
Amazon Gift Card Incentives API：https://developer.amazon.com/zh/docs/incentives-api/incentives-api.html
"""
import datetime
import hashlib
import hmac
import sys

import requests

method = 'POST'
service = 'AGCODService'
host = 'agcod-v2-fe-gamma.amazon.com'
region = 'us-west-2'
endpoint = 'https://agcod-v2-fe-gamma.amazon.com/CreateGiftCard'
content_type = 'application/json'
amz_target = 'com.amazonaws.agcod.AGCODService.CreateGiftCard'
parameters = """{"creationRequestId":"You77666","partnerId":"You77","value":{"currencyCode":"JPY","amount":1000}}"""
# TODO 
access_key = ''
secret_key = ''


def sign(key, msg):
    return hmac.new(key, msg.encode("utf-8"), hashlib.sha256).digest()


def get_signature_key(key, date_stamp, region_name, service_name):
    kDate = sign(('AWS4' + key).encode('utf-8'), date_stamp)
    kRegion = sign(kDate, region_name)
    kService = sign(kRegion, service_name)
    kSigning = sign(kService, 'aws4_request')
    return kSigning


if access_key is None or secret_key is None:
    print('No access key is available.')
    sys.exit()

t = datetime.datetime.utcnow()
amz_date = t.strftime('%Y%m%dT%H%M%SZ')
date_stamp = t.strftime('%Y%m%d')

canonical_uri = '/CreateGiftCard'
canonical_querystring = ''

# Note that there is a trailing \n.
canonical_headers = 'accept:{}\nhost:{}\nx-amz-date:{}\nx-amz-target:{}\n'.format(content_type,
                                                                                  host,
                                                                                  amz_date,
                                                                                  amz_target)
signed_headers = 'accept;host;x-amz-date;x-amz-target'

payload_hash = hashlib.sha256(parameters.encode('utf-8')).hexdigest()
print("\nHashed Payload")
print(payload_hash)

canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + '\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
print("\nCanonical Request:")
print(canonical_request)

algorithm = 'AWS4-HMAC-SHA256'
credential_scope = date_stamp + '/' + region + '/' + service + '/' + 'aws4_request'
string_to_sign = algorithm + '\n' + amz_date + '\n' + credential_scope + '\n' + hashlib.sha256(
    canonical_request.encode('utf-8')).hexdigest()
print("\nString To Sign:")
print(string_to_sign)

signing_key = get_signature_key(secret_key, date_stamp, region, service)
signature = hmac.new(signing_key, string_to_sign.encode('utf-8'), hashlib.sha256).hexdigest()
print("\nsignature:")
print(signature)

authorization_header = "{} Credential={}/{},SignedHeaders={},Signature={}".format(algorithm,
                                                                                  access_key,
                                                                                  credential_scope,
                                                                                  signed_headers,
                                                                                  signature)
print("\nAuthorization:")
print(authorization_header)

headers = {'Content-Type': content_type,
           'accept': content_type,
           'X-Amz-Date': amz_date,
           'X-Amz-Target': amz_target,
           'Authorization': authorization_header}

print("\nHeaders:")
print(headers)

# ************* SEND THE REQUEST *************
print('\nBEGIN REQUEST++++++++++++++++++++++++++++++++++++')
print('Request URL = ' + endpoint)

r = requests.post(endpoint, data=parameters, headers=headers)

print('\nRESPONSE++++++++++++++++++++++++++++++++++++')
print('Response code: %d\n' % r.status_code)
print(r.text)