AMAZON CHANGES ITS API RULE FROM NOV

amazon weservices chages its api rule from the nov now itrs nessasery to dd the associate tag with the secret kry to call the product on your site

All the all the site running without the associate tag are bloked and need associate tag



now the new code for the requesting product api are



firsrt is to send request Signed_request.php





function aws_signed_request($region,$params,$public_key,$private_key,$associate_tag)
{

$method = "GET";
$host = "ecs.amazonaws.".$region; // must be in small case
$uri = "/onca/xml";


$params["Service"] = "AWSECommerceService";
$params["AWSAccessKeyId"] = $public_key;
$params["AssociateTag"] = $associate_tag;
$params["Timestamp"] = gmdate("Y-m-d\TH:i:s\Z");
$params["Version"] = "2009-03-31";

/* The params need to be sorted by the key, as Amazon does this at
their end and then generates the hash of the same. If the params
are not in order then the generated hash will be different thus
failing the authetication process.
*/
ksort($params);

$canonicalized_query = array();

foreach ($params as $param=>$value)
{
$param = str_replace("%7E", "~", rawurlencode($param));
$value = str_replace("%7E", "~", rawurlencode($value));
$canonicalized_query[] = $param."=".$value;
}

$canonicalized_query = implode("&", $canonicalized_query);

$string_to_sign = $method."\n".$host."\n".$uri."\n".$canonicalized_query;

/* calculate the signature using HMAC with SHA256 and base64-encoding.
The 'hash_hmac' function is only available from PHP 5 >= 5.1.2.
*/
$signature = base64_encode(hash_hmac("sha256", $string_to_sign, $private_key, True));

/* encode the signature for the request */
$signature = str_replace("%7E", "~", rawurlencode($signature));

/* create request */
$request = "http://".$host.$uri."?".$canonicalized_query."&Signature=".$signature;

/* I prefer using CURL */
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$request);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 15);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);

$xml_response = curl_exec($ch);

/* If cURL doesn't work for you, then use the 'file_get_contents'
function as given below.
*/

if ($xml_response === False)
{
return False;
}
else
{
/* parse XML */
$parsed_xml = @simplexml_load_string($xml_response);
return ($parsed_xml === False) ? False : $parsed_xml;
}
}
?>




to search the product request
classes.php


require_once 'Signed_request.php';

class AmazonProductAPI
{
/**
* Your Amazon Access Key Id
* @access private
* @var string
*/
private $public_key = "YOUR AMAZON KEY";

/**
* Your Amazon Secret Access Key
* @access private
* @var string
*/
private $private_key = "YOUR AMAZON SECRET KEY";

/**
* Your Amazon Associate Tag
* Now required, effective from 25th Oct. 2011
* @access private
* @var string
*/
private $associate_tag = "YOUR AMAZON ASSOCIATE TAG";

/**
* Constants for product types
* @access public
* @var string
*/

/*
Only three categories are listed here.
More categories can be found here:
http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/APPNDX_SearchIndexValues.html
*/
const MUSIC = "Music";
const DVD = "DVD";
const GAMES = "VideoGames";


/**
* Check if the xml received from Amazon is valid
*
* @param mixed $response xml response to check
* @return bool false if the xml is invalid
* @return mixed the xml response if it is valid
* @return exception if we could not connect to Amazon
*/
private function verifyXmlResponse($response)
{
if ($response === False)
{
throw new Exception("Could not connect to Amazon");
}
else
{
if (isset($response->Items->Item->ItemAttributes->Title))
{
return ($response);
}
else
{
throw new Exception("Invalid xml response.");
}
}
}


/**
* Query Amazon with the issued parameters
*
* @param array $parameters parameters to query around
* @return simpleXmlObject xml query response
*/
private function queryAmazon($parameters)
{
return aws_signed_request("com", $parameters, $this->public_key, $this->private_key, $this->associate_tag);
}


/**
* Return details of products searched by various types
*
* @param string $search search term
* @param string $category search category
* @param string $searchType type of search
* @return mixed simpleXML object
*/
public function searchProducts($search, $category, $searchType = "UPC")
{
$allowedTypes = array("UPC", "TITLE", "ARTIST", "KEYWORD");
$allowedCategories = array("Music", "DVD", "VideoGames");

switch($searchType)
{
case "UPC" : $parameters = array("Operation" => "ItemLookup",
"ItemId" => $search,
"SearchIndex" => $category,
"IdType" => "UPC",
"ResponseGroup" => "Medium");
break;

case "TITLE" : $parameters = array("Operation" => "ItemSearch",
"Title" => $search,
"SearchIndex" => $category,
"ResponseGroup" => "Medium");
break;

}

$xml_response = $this->queryAmazon($parameters);

return $this->verifyXmlResponse($xml_response);

}


/**
* Return details of a product searched by UPC
*
* @param int $upc_code UPC code of the product to search
* @param string $product_type type of the product
* @return mixed simpleXML object
*/
public function getItemByUpc($upc_code, $product_type)
{
$parameters = array("Operation" => "ItemLookup",
"ItemId" => $upc_code,
"SearchIndex" => $product_type,
"IdType" => "UPC",
"ResponseGroup" => "Medium");

$xml_response = $this->queryAmazon($parameters);

return $this->verifyXmlResponse($xml_response);

}


/**
* Return details of a product searched by ASIN
*
* @param int $asin_code ASIN code of the product to search
* @return mixed simpleXML object
*/
public function getItemByAsin($asin_code)
{
$parameters = array("Operation" => "ItemLookup",
"ItemId" => $asin_code,
"ResponseGroup" => "Medium");

$xml_response = $this->queryAmazon($parameters);

return $this->verifyXmlResponse($xml_response);
}


/**
* Return details of a product searched by keyword
*
* @param string $keyword keyword to search
* @param string $product_type type of the product
* @return mixed simpleXML object
*/
public function getItemByKeyword($keyword, $product_type)
{
$parameters = array("Operation" => "ItemSearch",
"Keywords" => $keyword,
"SearchIndex" => $product_type);

$xml_response = $this->queryAmazon($parameters);

return $this->verifyXmlResponse($xml_response);
}

}

?>




now to see teh xml and list of search search.php


include("class.php");

$obj = new AmazonProductAPI();

try
{
$result = $obj->searchProducts("X-Men Origins",
AmazonProductAPI::DVD,
"TITLE");
}
catch(Exception $e)
{
echo $e->getMessage();
}

print_r($result);

echo "Sales Rank : {$result->Items->Item->SalesRank}
";
echo "ASIN : {$result->Items->Item->ASIN}
";
echo "
Items->Item->MediumImage->URL . "\" />
";


?>



for more detail you can go to site refrence http://www.codediesel.com