Get the Top Seller items from Amazon using AWS

In a previous post we had seen on how to access the Amazon Product Advertising API. In this post we will see how to add a function to get the ‘Top Sellers’ list for a particular category.

As mentioned in this post, Amazon uses a hierarchy of nodes to organize its various items. Each node represents a collection of items. Browse node IDs are positive integers that uniquely identify product collections. You can get a top seller list for a particular category or sub-category by passing a browsenode id for that particular category.
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Amazon Advertising API BrowseNodes

Amazon uses a hierarchy of nodes to organize its various items. Each node represents a collection of items, such as Harry Potter books, not the items themselves. Browse node IDs are positive integers that uniquely identify product collections, for example, Literature & Fiction: (17), Medicine: (13996), Mystery & Thrillers: (18), Nonfiction: (53), Outdoors & Nature: (290060). Amazon uses over 120,000 browse node IDs in the US locale alone.

The BrowseNodes tool automatically gets all the child BrowseNodes and their names. The program recursively traverses the BrowserNode hierarchy and returns all the BrowseNodes and their respective names. You can display the nodes on the console or save it to a CSV file. You can also include the library in your existing projects to process BrowseNodes.
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Accessing Amazon Product Advertising API

Updated: 19th October 2011

In this post we will see how to access the Amazon Product Advertising API from PHP. Amazon has recently changed (from 15th Aug ’09) the authentication mechanism for accessing their API which must now be signed with your Amazon keys. Unsigned requests will be rejected by Amazon. Also now Amazon Associate Tag is required in the query (effective from 25th Oct. 2011). Note that the code uses the hash_hmac() hash function which is only available for PHP versions 5.1.2 and above, so the code will not work for versions below that.
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