質問編集履歴
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コード全文を追記
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========
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```Python
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import hmac
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```
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========
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(参照元ブログ)https://tech.torico-corp.com/blog/amazon-marketplace-mws-api/
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【2018/01/09追記】
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署名対象の文字列を実行する部分のコードも合わせて転記させていただきます。
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(実行しているコード全文です)
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```Python
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import base64
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import datetime
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import hashlib
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import hmac
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from urllib import quote
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import requests
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AMAZON_CREDENTIAL = {
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'SELLER_ID': 'セラーID',
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'ACCESS_KEY_ID': 'AWSアクセスキーID',
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'ACCESS_SECRET': 'アクセスシークレット',
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}
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DOMAIN = 'mws.amazonservices.jp'
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ENDPOINT = '/Orders/2013-09-01'
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def datetime_encode(dt):
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return dt.strftime('%Y-%m-%dT%H:%M:%SZ')
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timestamp = datetime_encode(datetime.datetime.utcnow())
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last_update_after = datetime_encode(
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datetime.datetime.utcnow() - datetime.timedelta(days=1))
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data = {
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'AWSAccessKeyId': AMAZON_CREDENTIAL['ACCESS_KEY_ID'],
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'Action': 'ListOrders',
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'MarketplaceId.Id.1': 'A1VC38T7YXB528',
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'SellerId': AMAZON_CREDENTIAL['SELLER_ID'],
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'SignatureMethod': 'HmacSHA256',
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'SignatureVersion': '2',
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'Timestamp': timestamp,
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'Version': '2013-09-01',
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'LastUpdatedAfter': last_update_after,
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}
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query_string = '&'.join('{}={}'.format(
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n, quote(v, safe='%')) for n, v in sorted(data.items()))
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canonical = "{}\n{}\n{}\n{}".format(
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'POST', DOMAIN, ENDPOINT, query_string
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)
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h = hmac.new(
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bytes(AMAZON_CREDENTIAL['ACCESS_SECRET']),
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bytes(canonical), hashlib.sha256)
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signature = quote(base64.b64encode(h.digest()), safe='')
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url = 'https://{}{}?{}&Signature={}'.format(
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DOMAIN, ENDPOINT, query_string, signature)
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response = requests.post(url)
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print(response.content.decode())
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```
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