错误“为提要传递的ContentMD5 HTTP头与我们为提要计算的ContentMD5不匹配”

Question

我试图为在Django（Python）环境中使用AmazonAPI的产品设定最高价格。 我已经解决了计算md5函数的问题，该函数的值与Amazon MWS Scratchpad计算的值完全相同

解决此问题后，我现在收到一条“为提要传递的Content-MD5 HTTP头与我们为提要计算的Content-MD5不匹配”错误消息

我的代码如下：

feedTxt = '<?xml version="1.0" encoding="utf-8"?><AmazonEnvelope xsi:noNamespaceSchemaLocation="amzn-envelope.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Header><DocumentVersion>1.01</DocumentVersion><MerchantIdentifier>MERCH_ID</MerchantIdentifier></Header><MessageType>Price</MessageType><Message><MessageID>1</MessageID><Price><SKU>J1-1UKW-8Z03</SKU><MaximumSellerAllowedPrice currency="EUR">999</MaximumSellerAllowedPrice></Price></Message></AmazonEnvelope>'

feed = open('myXml.xml', mode='w+', buffering=-1, encoding='utf-8')
feed.write(feedTxt)
feed.close()

encodedFeed = feedTxt.strip().encode('utf-8')

md5 = hashlib.md5(encodedFeed).digest()
encodedMd5 = base64.b64encode(md5)
parsedMd5 = urllib.parse.quote(encodedMd5, safe='')

request_string = construct_strings(seller, '', 'SubmitFeed', '2009-01-01', args_dict) # this function defines the string to be signed and is working 100%, since I use it for all the other requests I do

feed = open('myXml.xml', mode='r', buffering=-1, encoding='utf-8')
myFile = {'file': feed}
response = requests.post(request_string, headers = {'Content-MD5': encodedMd5, 'Content-Type': 'text/xml'}, files = myFile)            
feed.close()

这是我在stackOverflow的第一个问题。 我很感激你能给我的任何提示

谢谢

Answer 1

我只想告诉你我的问题已经解决了。我发现feed不是作为文件发布的，而是在body（'data'字段）中发布的。因此（在大量其他更正中），最终代码为：

feed = '<?xml version="1.0" encoding="utf-8"?><AmazonEnvelope xsi:noNamespaceSchemaLocation="amzn-envelope.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Header>'
feed += '<DocumentVersion>1.01</DocumentVersion><MerchantIdentifier>A3RVNLI4ZWO9K4</MerchantIdentifier></Header><MessageType>Price</MessageType><Message><MessageID>1</MessageID>'
feed += '<Price><SKU>sa400240g</SKU><MaximumSellerAllowedPrice currency="EUR">975</MaximumSellerAllowedPrice></Price></Message></AmazonEnvelope>'

encodedFeed = feed.encode('utf-8')
md5 = hashlib.md5(encodedFeed)
encodedMd5 = base64.b64encode(md5.digest())
parsedMd5 = urllib.parse.quote(encodedMd5, safe='')                       

request_string = construct_strings(seller, '', 'SubmitFeed', '2009-01-01', args_dict)
myHeader = {'Content-MD5': encodedMd5.decode('utf-8'), 'Content-Type': 'text/xml'}
response = requests.post(request_string, headers = myHeader, data = feed)

无论如何，谢谢你！ 希望这个解决方案能帮助有同样问题的人