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<?php
/**
* Class to access Amazons Product Advertising API
* @author Mo Atef
* @link http://www.deandev.com
* @version 1.0
*/
// Signing requests class
require_once 'aws_signed_request.php';
class wp_automatic_AmazonProductAPI {
/**
* curl handle
*/
public $ch;
/**
* Your Amazon Access Key Id
*
* @access private
* @var string
*/
private $public_key = "";
/**
* Your Amazon Secret Access Key
*
* @access private
* @var string
*/
private $private_key = "";
/**
* Your Amazon Associate Tag
* Now required, effective from 25th Oct.
* 2011
*
* @access private
* @var string
*/
private $associate_tag = "YOUR AMAZON ASSOCIATE TAG";
private $region = "";
private $host = "";
/**
* Constants for product types
*
* @access public
* @var string
*/
/*
* Only three categories are listed here.
* More categories can be found here:
* http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/APPNDX_SearchIndexValues.html
*/
const MUSIC = "Music";
const DVD = "DVD";
const GAMES = "VideoGames";
function __construct($public, $private, $ass, $region) {
$this->public_key = $public;
$this->private_key = $private;
$this->associate_tag = $ass;
$this->region = $region;
$this->host = "webservices.amazon." . $this->region;
$this->awsv4 = new wp_automatic_AwsV4 ( $public, $private );
$this->awsv4->setRegionName ( $this->region ); // e.g com should be converted to us-east-1
$this->awsv4->setServiceName ( "ProductAdvertisingAPI" );
$this->awsv4->addHeader ( 'host', $this->host );
$this->awsv4->setRequestMethod ( "POST" );
$this->awsv4->addHeader ( 'content-encoding', 'amz-1.0' );
$this->awsv4->addHeader ( 'content-type', 'application/json; charset=utf-8' );
$this->awsv4->addHeader ( 'host', $this->host );
$rand = rand ( 2, 3 );
// sleep( $rand );
echo '<br>Waiting for: ' . $rand . ' Seconds...<br>';
}
/**
* 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)
{
@$err = $response->Error->Message;
if (trim ( $err ) != '') {
throw new Exception ( '<br>' . $err );
return false;
}
if ($response === False) {
throw new Exception ( "Could not connect to Amazon" );
} else {
if (isset ( $response->Items->Item->ItemAttributes->Title )) {
return ($response);
} else
{
// print_r($response);
$err = @$response->Items->Request->Errors->Error->Message;
if (trim ( $err ) != '') {
echo '<br><b>Amazon Error</b>:' . $err;
}
/*
* echo("<br>Invalid xml response.");
* print_r($response);
*/
}
}
}
/**
* Query Amazon with the issued parameters
*
* @param array $parameters
* parameters to query around
* @return simpleXmlObject xml query response
*/
private function queryAmazon($parameters) {
return wp_automatic_aws_signed_request ( $this->region, $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, $ItemPage, $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",
"ItemPage" => $ItemPage,
"ResponseGroup" => "Medium"
);
break;
case "TITLE" :
$parameters = array (
"Operation" => "ItemSearch",
"Title" => $search,
"ItemPage" => $ItemPage,
"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) {
$uriPath = "/paapi5/getitems";
$search_params ['PartnerTag'] = $this->associate_tag;
$search_params ['PartnerType'] = 'Associates';
$search_params ['Marketplace'] = 'www.amazon.' . $this->region;
$search_params ['ItemIds'] = array (
$asin_code
);
$search_params ['Resources'] = array (
"Images.Primary.Large",
"Images.Variants.Large",
"ItemInfo.ContentInfo",
"ItemInfo.Features",
"ItemInfo.ProductInfo",
"ItemInfo.Title",
"Offers.Listings.Price"
);
$payload = json_encode ( $search_params );
$this->awsv4->addHeader ( 'x-amz-target', 'com.amazon.paapi5.v1.ProductAdvertisingAPIv1.GetItems' );
$this->awsv4->setPath ( $uriPath );
$this->awsv4->setPayload ( $payload );
$headers = $this->awsv4->getHeaders ();
$headerString = "";
$cu_headers = array ();
foreach ( $headers as $key => $value ) {
$cu_headers [] = $key . ': ' . $value;
}
$request_url = 'https://' . $this->host . $uriPath;
// curl URL
$curlurl = $request_url;
// Headers
curl_setopt ( $this->ch, CURLOPT_HTTPHEADER, $cu_headers );
curl_setopt ( $this->ch, CURLOPT_URL, $curlurl );
curl_setopt ( $this->ch, CURLOPT_POST, true );
curl_setopt ( $this->ch, CURLOPT_POSTFIELDS, $payload );
$x = 'error';
$exec = curl_exec ( $this->ch );
// empty response
if (trim ( $exec ) == '') {
echo '<br>Request we issued to Amazon did not return any data ' . $x;
return array ();
}
// no json reply
if (! stristr ( $exec, '{' )) {
echo '<br>Returned response does not look like a Json reply:' . $exec . $x;
return array ();
}
$result = json_decode ( $exec );
// amazon error report
if (isset ( $result->Errors )) {
throw new Exception ( '<br><strong>Amazon returned an error</strong> <span style="color:red">' . $result->Errors [0]->Code . ':' . $result->Errors [0]->Message . '</span>' );
}
if (isset ( $result->ItemsResult->Items )) {
return $result->ItemsResult->Items;
} else {
return array ();
}
}
/**
* 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, $ItemPage, $product_type, $additionalParam = array(), $min = '', $max = '') {
if ($keyword != "*")
$search_params ['Keywords'] = $keyword;
$search_params ['Operation'] = 'SearchItems';
$search_params ['PartnerTag'] = $this->associate_tag;
$search_params ['PartnerType'] = 'Associates';
$search_params ['Marketplace'] = 'www.amazon.' . $this->region;
$search_params ['ItemPage'] = ( int ) $ItemPage;
$search_params ['Resources'] = array (
"Images.Primary.Large",
"Images.Variants.Large",
"ItemInfo.ContentInfo",
"ItemInfo.Features",
"ItemInfo.ProductInfo",
"ItemInfo.Title",
"Offers.Listings.Price"
);
// min price
if ($min != "") {
$search_params ['MinPrice'] = ( int ) $min;
} else {
// 1 cent
$search_params ['MinPrice'] = 1;
}
// max price
if ($max != "")
$search_params ['MaxPrice'] = ( int ) $max;
$search_params = array_merge ( $search_params, $additionalParam );
// Search Index
if ($product_type != 'All')
$search_params ['SearchIndex'] = $product_type;
$payload = json_encode ( $search_params );
$uriPath = "/paapi5/searchitems";
$this->awsv4->addHeader ( 'x-amz-target', 'com.amazon.paapi5.v1.ProductAdvertisingAPIv1.SearchItems' );
$this->awsv4->setPath ( $uriPath );
$this->awsv4->setPayload ( $payload );
$headers = $this->awsv4->getHeaders ();
$headerString = "";
$cu_headers = array ();
foreach ( $headers as $key => $value ) {
$cu_headers [] = $key . ': ' . $value;
}
$request_url = 'https://' . $this->host . $uriPath;
// curl URL
$curlurl = $request_url;
// Headers
curl_setopt ( $this->ch, CURLOPT_HTTPHEADER, $cu_headers );
curl_setopt ( $this->ch, CURLOPT_URL, $curlurl );
curl_setopt ( $this->ch, CURLOPT_POST, true );
curl_setopt ( $this->ch, CURLOPT_POSTFIELDS, $payload );
$x = 'error';
$exec = curl_exec ( $this->ch );
$x = curl_error ( $this->ch );
// empty response
if (trim ( $exec ) == '') {
throw new Exception ( 'Request we issued to Amazon did not return any data ' . $x );
}
// no json reply
if (! stristr ( $exec, '{' )) {
throw new Exception ( '<br>Returned response does not look like a Json reply:' . $exec . $x );
}
$result = json_decode ( $exec );
// print_r($result);
// amazon error report
if (isset ( $result->Errors )) {
// no results
if ($result->Errors [0]->Code == 'NoResults') {
echo '<br>Amazon tells that there were no results matching your search';
return array ();
}
throw new Exception ( '<br><strong>Amazon returned an error</strong> <span style="color:red">' . $result->Errors [0]->Code . ':' . $result->Errors [0]->Message . '</span>' );
}
if (isset ( $result->SearchResult->Items )) {
return $result->SearchResult->Items;
} else {
return array ();
}
}
/**
* Return list of ASINs of items by scraping the page
*
* @param string $pageUrl
* @param string $ch
* curl handler
*/
public function getASINs($moreUrl, &$ch) {
// curl get
$x = 'error';
$url = $moreUrl;
curl_setopt ( $ch, CURLOPT_HTTPGET, 1 );
curl_setopt ( $ch, CURLOPT_URL, trim ( $url ) );
curl_setopt ( $ch, CURLOPT_ENCODING, "" );
$exec = curl_exec ( $ch );
$x = curl_error ( $ch );
// validate reply
if (trim ( $exec ) == '') {
throw new Exception ( 'Empty reply from Amazon with possible curl error ' . $x );
}
// validate products found
if (! stristr ( $exec, 'data-asin' )) {
// throw new Exception('No items found') ;
echo '<br>No items found';
return array ();
}
// extract products
preg_match_all ( '{data-asin="(.*?)"}', $exec, $productMatchs );
$asins = $productMatchs [1];
if (stristr ( $exec, 'proceedWarning' )) {
echo '<br>Reached end page of items';
return array ();
}
return ($asins);
}
}
?>