我没有通过Amazon Product Advertising API获得价格 [英] I don't get prices with Amazon Product Advertising API
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问题描述
我尝试通过Amazon Product Advertising API获取ASIN编号的价格.
代码:
$artNr = "B003TKSD8E";
$base_url = "http://ecs.amazonaws.de/onca/xml";
$params = array(
'AWSAccessKeyId' => self::API_KEY,
'AssociateTag' => self::API_ASSOCIATE_TAG,
'Version' => "2010-11-01",
'Operation' => "ItemLookup",
'Service' => "AWSECommerceService",
'Condition' => "All",
'IdType' => 'ASIN',
'ItemId' => $artNr);
$params['Timestamp'] = gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time());
$url_parts = array();
foreach(array_keys($params) as $key)
$url_parts[] = $key . "=" . str_replace('%7E', '~', rawurlencode($params[$key]));
sort($url_parts);
$url_string = implode("&", $url_parts);
$string_to_sign = "GET\necs.amazonaws.de\n/onca/xml\n" . $url_string;
$signature = hash_hmac("sha256", $string_to_sign, self::API_SECRET, TRUE);
$signature = urlencode(base64_encode($signature));
$url = $base_url . '?' . $url_string . "&Signature=" . $signature;
$response = file_get_contents($url);
$parsed_xml = simplexml_load_string($response);
我认为这应该是正确的-但我在回复中没有收到报价:
<?xml version="1.0" ?>
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2010-11-01">
<OperationRequest>
<RequestId>*********************</RequestId>
<Arguments>
<Argument Name="Condition" Value="All">
</Argument>
<Argument Name="Operation" Value="ItemLookup">
</Argument>
<Argument Name="Service" Value="AWSECommerceService">
</Argument>
<Argument Name="ItemId" Value="B003TKSD8E">
</Argument>
<Argument Name="IdType" Value="ASIN">
</Argument>
<Argument Name="AWSAccessKeyId" Value="*********************">
</Argument>
<Argument Name="Timestamp" Value="2011-11-29T01:49:01.000Z">
</Argument>
<Argument Name="Signature" Value="*********************">
</Argument>
<Argument Name="AssociateTag" Value="*********************">
</Argument>
<Argument Name="Version" Value="2010-11-01">
</Argument>
</Arguments>
<RequestProcessingTime>0.0083130000000000</RequestProcessingTime>
</OperationRequest>
<Items>
<Request>
<IsValid>True</IsValid>
<ItemLookupRequest>
<Condition>All</Condition>
<IdType>ASIN</IdType>
<ItemId>B003TKSD8E</ItemId>
<ResponseGroup>Small</ResponseGroup>
<VariationPage>All</VariationPage>
</ItemLookupRequest>
</Request>
<Item>
<ASIN>B003TKSD8E</ASIN>
<DetailPageURL>http://www.amazon.de/Apple-iPhone-4-32GB-schwarz/dp/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB003TKSD8E</DetailPageURL>
<ItemLinks>
<ItemLink>
<Description>Add To Wishlist</Description>
<URL>http://www.amazon.de/gp/registry/wishlist/add-item.html%3Fasin.0%3DB003TKSD8E%26SubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>Tell A Friend</Description>
<URL>http://www.amazon.de/gp/pdp/taf/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>All Customer Reviews</Description>
<URL>http://www.amazon.de/review/product/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>All Offers</Description>
<URL>http://www.amazon.de/gp/offer-listing/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
</ItemLinks>
<ItemAttributes>
<Manufacturer>Apple Computer</Manufacturer>
<ProductGroup>CE</ProductGroup>
<Title>Apple iPhone 4 32GB schwarz</Title>/ItemAttributes>
</Item>
</Items>
</ItemLookupResponse>
有人可以向我解释为什么我没有任何价格信息吗?
非常感谢
解决方案
要获取商品价格，您需要包含Offers或OfferFull的ResponseGroup参数和All的MerchantId参数:
$params = array(
'AWSAccessKeyId' => self::API_KEY,
'AssociateTag' => self::API_ASSOCIATE_TAG,
'Version' => "2010-11-01",
'Operation' => "ItemLookup",
'Service' => "AWSECommerceService",
'Condition' => "All",
'IdType' => 'ASIN',
'ResponseGroup' => 'Offers', <- important
'MerchantId' => 'All', <- important
'ItemId' => $artNr);
如果不包括All的MerchantId，则只会获得Amazon的报价清单(默认为MerchantId).这将返回报价列表，并且您的回复将包含以下内容:
<Items>
...
<Item>
...
<Offers>
...
<Offer>
...
<OfferListing>
<Price>
<Amount>1350</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$13.50</FormattedPrice>
</Price>
...
</OfferListing>
...
</Offer>
...
有关更多信息，请参见报价响应组的文档.另请参阅 ItemLookup操作的响应组请求参数说明，以获取更多有效的响应组. >
I try to get prices of an ASIN number with the Amazon Product Advertising API.
Code:
$artNr = "B003TKSD8E";
$base_url = "http://ecs.amazonaws.de/onca/xml";
$params = array(
'AWSAccessKeyId' => self::API_KEY,
'AssociateTag' => self::API_ASSOCIATE_TAG,
'Version' => "2010-11-01",
'Operation' => "ItemLookup",
'Service' => "AWSECommerceService",
'Condition' => "All",
'IdType' => 'ASIN',
'ItemId' => $artNr);
$params['Timestamp'] = gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time());
$url_parts = array();
foreach(array_keys($params) as $key)
$url_parts[] = $key . "=" . str_replace('%7E', '~', rawurlencode($params[$key]));
sort($url_parts);
$url_string = implode("&", $url_parts);
$string_to_sign = "GET\necs.amazonaws.de\n/onca/xml\n" . $url_string;
$signature = hash_hmac("sha256", $string_to_sign, self::API_SECRET, TRUE);
$signature = urlencode(base64_encode($signature));
$url = $base_url . '?' . $url_string . "&Signature=" . $signature;
$response = file_get_contents($url);
$parsed_xml = simplexml_load_string($response);
I think this should be correct - but I don't get offers in the response:
<?xml version="1.0" ?>
<ItemLookupResponse xmlns="http://webservices.amazon.com/AWSECommerceService/2010-11-01">
<OperationRequest>
<RequestId>*********************</RequestId>
<Arguments>
<Argument Name="Condition" Value="All">
</Argument>
<Argument Name="Operation" Value="ItemLookup">
</Argument>
<Argument Name="Service" Value="AWSECommerceService">
</Argument>
<Argument Name="ItemId" Value="B003TKSD8E">
</Argument>
<Argument Name="IdType" Value="ASIN">
</Argument>
<Argument Name="AWSAccessKeyId" Value="*********************">
</Argument>
<Argument Name="Timestamp" Value="2011-11-29T01:49:01.000Z">
</Argument>
<Argument Name="Signature" Value="*********************">
</Argument>
<Argument Name="AssociateTag" Value="*********************">
</Argument>
<Argument Name="Version" Value="2010-11-01">
</Argument>
</Arguments>
<RequestProcessingTime>0.0083130000000000</RequestProcessingTime>
</OperationRequest>
<Items>
<Request>
<IsValid>True</IsValid>
<ItemLookupRequest>
<Condition>All</Condition>
<IdType>ASIN</IdType>
<ItemId>B003TKSD8E</ItemId>
<ResponseGroup>Small</ResponseGroup>
<VariationPage>All</VariationPage>
</ItemLookupRequest>
</Request>
<Item>
<ASIN>B003TKSD8E</ASIN>
<DetailPageURL>http://www.amazon.de/Apple-iPhone-4-32GB-schwarz/dp/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB003TKSD8E</DetailPageURL>
<ItemLinks>
<ItemLink>
<Description>Add To Wishlist</Description>
<URL>http://www.amazon.de/gp/registry/wishlist/add-item.html%3Fasin.0%3DB003TKSD8E%26SubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>Tell A Friend</Description>
<URL>http://www.amazon.de/gp/pdp/taf/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>All Customer Reviews</Description>
<URL>http://www.amazon.de/review/product/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
<ItemLink>
<Description>All Offers</Description>
<URL>http://www.amazon.de/gp/offer-listing/B003TKSD8E%3FSubscriptionId%3DAKIAI6NFQHK2DQIPRUEQ%26tag%3Dbanholzerme-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D12738%26creativeASIN%3DB003TKSD8E</URL>
</ItemLink>
</ItemLinks>
<ItemAttributes>
<Manufacturer>Apple Computer</Manufacturer>
<ProductGroup>CE</ProductGroup>
<Title>Apple iPhone 4 32GB schwarz</Title>/ItemAttributes>
</Item>
</Items>
</ItemLookupResponse>
Can someone please explain me why I don't get any price-information?
Thank you very much
解决方案
To get prices for an item you need to include a ResponseGroup parameter of Offers or OfferFull and a MerchantId parameter of All:
$params = array(
'AWSAccessKeyId' => self::API_KEY,
'AssociateTag' => self::API_ASSOCIATE_TAG,
'Version' => "2010-11-01",
'Operation' => "ItemLookup",
'Service' => "AWSECommerceService",
'Condition' => "All",
'IdType' => 'ASIN',
'ResponseGroup' => 'Offers', <- important
'MerchantId' => 'All', <- important
'ItemId' => $artNr);
If you don't include the MerchantId of All you will only get offer listings for Amazon (the default MerchantId). This will return the offer listings and your response will include something like the following:
<Items>
...
<Item>
...
<Offers>
...
<Offer>
...
<OfferListing>
<Price>
<Amount>1350</Amount>
<CurrencyCode>USD</CurrencyCode>
<FormattedPrice>$13.50</FormattedPrice>
</Price>
...
</OfferListing>
...
</Offer>
...
See the documentation for the Offers Response Group for more information. Also see the Response Group request parameter description for the ItemLookup operation for more valid Response Groups.
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