GetLowestPricedOffersForSKU 处理参数失败

Question

我在尝试调用 GetLowestPricedOffersForSKU 时遇到了一个小问题，我收到了回复：

org.jboss.resteasy.spi.metadata 处理参数失败

我可以调用 Product Api 中的其他函数，它们工作正常，只是在这个函数上出现上述错误。

我已经在网上寻找答案，但找不到与此相关的任何内容，有人知道我为什么会得到这个吗？

顺便说一句，在 MWS Scratchpad 中一切正常！

Answer 1

发帖以防其他人遇到这个问题并且和我一样困惑。除了这个特定的请求之外，几乎所有亚马逊 MWS 请求的工作方式都存在根本差异。所有其他请求在技术上接受参数作为查询参数而不是 POST 数据。暂存器甚至表明它实际上是这样工作的（尽管 MWS 暂存器实际上也将数据作为发布数据字段发送）。

Answer 2

MWS 需要将 POST 数据作为表单参数而不是作为查询字符串传递给某些操作。否则，对于某些操作（例如此操作）会产生 Failed processing arguments of org.jboss.resteasy.spi.metadata 样式 400 Bad Request 错误（GetMyFeesEstimate 是另一个受此影响的操作）。

例如，如果您在 Guzzle 6 中执行以下 POST 请求，那么您可能会收到错误：

$response = $client->request('POST', 'https://mws.amazonservices.com/Products/2011-10-01/?AWSAccessKeyId=YOURAWSACCESSKEY&Action=GetLowestPricedOffersForASIN&SellerId=YOURSELLERID&MWSAuthToken=amzn.mws.fghsffg-4t44e-hfgh-dfgd-zgsdbfe5erg&SignatureVersion=2&Timestamp=2017-07-09T15%3A45%3A18%2B00%3A00&Version=2011-10-01&Signature=bCasdxXmYDCasdaXBhsdgse4pQ6hEbevML%2FJvzdgdsfdy2o%3D&SignatureMethod=HmacSHA256&MarketplaceId=ATVPDKIKX0DER&ASIN=B007EZK19E');

要解决此问题，您可以将其作为表单数据提交，如 Guzzle 6 示例中所示：

$response = $client->request('POST', 'https://mws.amazonservices.com/Products/2011-10-01', [
    'form_params' => [
        'AWSAccessKeyId' => 'YOURAWSACCESSKEY',
        'Action' => 'GetLowestPricedOffersForASIN',
        'SellerId' => 'YOURSELLERID',
        'MWSAuthToken' => 'amzn.mws.fghsffg-4t44e-hfgh-dfgd-zgsdbfe5erg',
        'SignatureVersion' => 2,
        'Timestamp' => '2017-07-09T15%3A45%3A18%2B00%3A00',
        'Version' => '2011-10-01',
        'Signature' => 'bCasdxXmYDCasdaXBhsdgse4pQ6hEbevML%2FJvzdgdsfdy2o%3D',
        'SignatureMethod' => 'HmacSHA256',
        'MarketplaceId' => 'ATVPDKIKX0DER',
        'ASIN' => 'B007EZK19E',
    ]
]);

Answer 3

这段代码对我有用。希望它会对某人有所帮助。

<?php

    require_once('.config.inc.php');

    // More endpoints are listed in the MWS Developer Guide
    // North America:
    $serviceUrl = "https://mws.amazonservices.com/Products/2011-10-01";
    // Europe
    //$serviceUrl = "https://mws-eu.amazonservices.com/Products/2011-10-01";
    // Japan
    //$serviceUrl = "https://mws.amazonservices.jp/Products/2011-10-01";
    // China
    //$serviceUrl = "https://mws.amazonservices.com.cn/Products/2011-10-01";


     $config = array (
       'ServiceURL' => $serviceUrl,
       'ProxyHost' => null,
       'ProxyPort' => -1,
       'ProxyUsername' => null,
       'ProxyPassword' => null,
       'MaxErrorRetry' => 3,
     );

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


     // @TODO: set request. Action can be passed as MarketplaceWebServiceProducts_Model_GetLowestPricedOffersForSKU
     $request = new MarketplaceWebServiceProducts_Model_GetLowestPricedOffersForSKURequest();
     $request->setSellerId(MERCHANT_ID);
     $request->setMWSAuthToken(MWSAUTH_TOKEN);
     $request->setMarketplaceId(MARKETPLACE_ID);
     $request->setSellerSKU($sellerSKU);
     $request->setItemCondition($ItemCondition);
     // object or array of parameters
     invokeGetLowestPricedOffersForSKU($service, $request);


      function invokeGetLowestPricedOffersForSKU(MarketplaceWebServiceProducts_Interface $service, $request)
      {
          try {
            $response = $service->GetLowestPricedOffersForSKU($request);

            echo ("Service Response\n");
            echo ("=============================================================================\n");

            $dom = new DOMDocument();
            $dom->loadXML($response->toXML());
            $dom->preserveWhiteSpace = false;
            $dom->formatOutput = true;
            echo $dom->saveXML();
            echo("ResponseHeaderMetadata: " . $response->getResponseHeaderMetadata() . "\n");

         } catch (MarketplaceWebServiceProducts_Exception $ex) {
             echo("Caught Exception: " . $ex->getMessage() . "\n");
             echo("Response Status Code: " . $ex->getStatusCode() . "\n");
             echo("Error Code: " . $ex->getErrorCode() . "\n");
             echo("Error Type: " . $ex->getErrorType() . "\n");
             echo("Request ID: " . $ex->getRequestId() . "\n");
             echo("XML: " . $ex->getXML() . "\n");
             echo("ResponseHeaderMetadata: " . $ex->getResponseHeaderMetadata() . "\n");
         }
     }
    ?>

Answer 4

正如@eComEvoFor 所说，对于这种特殊方法，亚马逊要求您在请求正文中指定参数。在使用 axios 库的 node.js 中，您可以这样做：

const paramsSorted = {}
Object.keys(params)
  .sort()
  .forEach((key) => {
    paramsSorted[key] = params[key]
  })
const data = new URLSearchParams(paramsSorted)
url = urljoin(this.marketplace.url, this.api, this.api.Version)
const response = await axios.post(url, data)