Amazon Product API: Get top/most selling products - amazon

Question

I am trying to lookup API which can give items like Top Products or Top Selling Products in a certain section(Book etc). I try to look for browser Node Section but could not find helpful as such.

Answer 1

I hope this PHP example helps you:
// Your AWS Access Key ID, as taken from the AWS Your Account page
$aws_access_key_id = $key_id;
// Your AWS Secret Key corresponding to the above ID, as taken from the AWS Your Account page
$aws_secret_key = $secret_key;
// The region you are interested in
$endpoint = "webservices.amazon.co.uk";
$uri = "/onca/xml";
$params = array(
"Service" => "AWSECommerceService",
"Operation" => "BrowseNodeLookup",
"AWSAccessKeyId" => "$aws_access_key_id",
"AssociateTag" => "$tag",
"BrowseNodeId" => "$nodeid_uk",
"ResponseGroup" => "TopSellers"
);
// Set current timestamp if not set
if (!isset($params["Timestamp"])) {
$params["Timestamp"] = gmdate('Y-m-d\TH:i:s\Z');
}
// Sort the parameters by key
ksort($params);
$pairs = array();
foreach ($params as $key => $value) {
array_push($pairs, rawurlencode($key)."=".rawurlencode($value));
}
// Generate the canonical query
$canonical_query_string = join("&", $pairs);
// Generate the string to be signed
$string_to_sign = "GET\n".$endpoint."\n".$uri."\n".$canonical_query_string;
// Generate the signature required by the Product Advertising API
$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $aws_secret_key, true));
// Generate the signed URL
$request_url = 'http://'.$endpoint.$uri.'?'.$canonical_query_string.'&Signature='.rawurlencode($signature);
echo "Signed URL: \"".$request_url."\"";