Can you show me your simple_aws_signed_request() call? Sounds like you might have a syntax error there.

Thanks!
hanji

Before August 2009 the effect of HMAC-SHA256 token signature API, our following URL request had always worked fine to bring back 2 pages of results that give a list of items that match Keywords ‘ma rolloer’ together with each item’s ID, icon, description, and reviews.

The request is made in PHP with the file_get_contents() function call.

file_get_contents(
‘http://webservices.amazon.com/onca/xml?Service=AWSECommerceService&SubscriptionId=__OurID___&Operation=ItemSearch&ItemSearch.Shared.SearchIndex=Blended&ItemSearch.Shared.Keywords=ma%20roller&ItemSearch.Shared.ResponseGroup=ItemIds,Images,ItemAttributes,Reviews,EditorialReview&ItemSearch.1.ItemPage=1&ItemSearch.2.ItemPage=2‘
);

I broke up the single long line of query into shorter lines to show more clearly all the individual query parameters.

http://webservices.amazon.com/onca/xml\
?Service=AWSECommerceService&SubscriptionId=__OurID___\
&Operation=ItemSearch\
&ItemSearch.Shared.SearchIndex=Blended\
&ItemSearch.Shared.Keywords=ma%20roller\
&ItemSearch.Shared.ResponseGroup=ItemIds,Images,ItemAttributes,Reviews,EditorialReview\
&ItemSearch.1.ItemPage=1\
&ItemSearch.2.ItemPage=2

This query request URL no longer works after August 2009.

I recently began to add Ulrich Mierendorff’s (THANKS to him and others who pointed me there) PHP function aws_signed_request() code for meeting HMAC-SHA256 token signature requirement.

I followed the instructions given at
http://www.money-code.com/2009/08/amazon-product-api-signaturedoesnotmatch-error-response/comment-page-1/#comment-792
to call aws_signed_request() to build and send the same query.

I tried a number of variations and always get back the following response:

WS.InvalidOperationParameter The Operation parameter is invalid. Please modify the Operation parameter and retry. Valid values for the Operation parameter include TagLookup, ListLookup, CartGet, SellerListingLookup, CustomerContentLookup, ItemLookup, SimilarityLookup, SellerLookup, ItemSearch, VehiclePartLookup, BrowseNodeLookup, CartModify, ListSearch, CartClear, VehiclePartSearch, CustomerContentSearch, CartCreate, TransactionLookup, VehicleSearch, SellerListingSearch, CartAdd, Help.

Even using the Operation=Help parameter-value pair returns the same response message.

Please help. THANKS in advance.

Not sure if I’m understanding you. Amazon adsense? AdSense is a Google service? Are you talking about regular Amazon listings?

hanji

many thanks in advance..

(check check check)

ARGH! (bashes head on wall) glad I stopped by this blog – will get that fixed today. Thanks!