CODEWITHSUNDEEP
amazon-web-servicesapiamazon-mws
Octelio
Octelio

Reputation: 83

SignatureDoesNotMatch in Amazon API

I am using the Amazon API and get this error while updating my stock from my database to Amazon website:

Caught Exception: Internal Error
Response Status Code: 0
Error Code:
Error Type:
Request ID:
XML:

I read this thread (amazonsellercommunity . com/forums/thread.jspa?messageID=2194823) and then get the error explanation:

<Error><Type>Sender</Type><Code>SignatureDoesNotMatch</Code><Message>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.</Message><Detail/></Error>

So I thought my MARKETPLACE_ID, MERCHANT_ID, AWS_ACCESS_KEY_ID or AWS_SECRET_ACCESS_KEY could be wrong. But I checked and these informations are correct.

Actually, I don't understand why this error happens... Before, it worked perfectly and since a couple of days it just crash. And I don't change anything in my code. Strange, isn't it?

Edit :

Here is my section code for signature.

define ('DATE_FORMAT', 'Y-m-d\TH:i:s\Z');
define('AWS_ACCESS_KEY_ID', 'ABC...'); // My AWS Access Key Id (20 characters)
define('AWS_SECRET_ACCESS_KEY', 'ABCDEF...'); // My AWS Secret Access Key (40 characters)
define('APPLICATION_NAME', 'MyCompany_AmazonMWS');
define('APPLICATION_VERSION', '0.0.1');
define ('MERCHANT_ID', 'XXXXXXX'); // My Merchant ID
define ('MARKETPLACE_ID', 'XXXXXXX'); // My Marketplace ID

$config = array (
'ServiceURL' => "https://mws.amazonservices.fr",
'ProxyHost' => null,
'ProxyPort' => -1,
'MaxErrorRetry' => 3,
);

$service = new MarketplaceWebService_Client(
AWS_ACCESS_KEY_ID,
AWS_SECRET_ACCESS_KEY,
$config,
APPLICATION_NAME,
APPLICATION_VERSION
);

$parameters = array (
'Marketplace' => MARKETPLACE_ID,
'Merchant' => MERCHANT_ID,
'FeedType' => '_POST_INVENTORY_AVAILABILITY_DATA_',
'FeedContent' => $feedHandle,
'PurgeAndReplace' => false,
'ContentMd5' => base64_encode(md5(stream_get_contents($feedHandle), true)),
);

// and then I do this:

$request = new MarketplaceWebService_Model_SubmitFeedRequest($parameters);
invokeSubmitFeed($service, $request);

If you want to see some parts of my code, just ask.

Upvotes: 5

Views: 5030

Answers (3)

Hebert N.
Hebert N.

Reputation: 21

I solved it (on Ubuntu 14.04 Server) using ntpdate:

First make sure it is installed:

apt-get install ntpdate

And then execute:

ntpdate ntp.ubuntu.com

Upvotes: 1

craastad
craastad

Reputation: 6472

For me it was just an error with my web app passing url escaped strings. The special characters weren't like by amazon and this (not so useful) error came up. Make sure your file names have no url escaped characters.

Upvotes: 1

Eugene Osovetsky
Eugene Osovetsky

Reputation: 6541

If I recall correctly, the authentication mechanism for Amazon APIs is sensitive to the current date/time on your machine (which is used in the process of signing the request). Check to see if your date/time is set correctly.

Upvotes: 2

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