Amazon产品广告API在php中的xml响应无效
我正在使用codeigniter开发web应用程序。上7个月前，我使用此代码从amazon获取产品，但上一个月我没有得到任何使用此代码的产品。我还联系了剧本作者，他还没有任何回应。任何人都可以告诉我问题出在哪里。是否有人拥有类似使用亚马逊产品广告API的代码 aws_signed_request.phpAmazon产品广告API在php中的xml响应无效,php,xml,amazon-web-services,amazon-s3,Php,Xml,Amazon Web Services,Amazon S3,我正在使用codeigniter开发web应用程序。上7个月前，我使用此代码从amazon获取产品，但上一个月我没有得到任何使用此代码的产品。我还联系了剧本作者，他还没有任何回应。任何人都可以告诉我问题出在哪里。是否有人拥有类似使用亚马逊产品广告API的代码 aws_signed_request.php function aws_signed_request($region,$params,$public_key,$private_key,$associate_tag) { $met
function aws_signed_request($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;
}
}
require_once 'aws_signed_request.php';
class AmazonProductAPI
{
/**
* Your Amazon Access Key Id
* @access private
* @var string
*/
private $public_key = "AKIAJF7UYAI77UYKXXXX";
/**
* Your Amazon Secret Access Key
* @access private
* @var string
*/
private $private_key = "ISEZ/SgZ9MV7OzTo5KRnkdhjotvp5tPCWnYLXXXX";
/**
* Your Amazon Associate Tag
* Now required, effective from 25th Oct. 2011
* @access private
* @var string
*/
private $associate_tag = "uytuyerxpo1-20";
/**
* 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);
}
}
?>
include("amazon_api_class.php");
$obj = new AmazonProductAPI();
try
{
$result = $obj->getItemByAsin("B018L25LPC");
}
catch(Exception $e)
{
echo $e->getMessage();
}
var_dump($result);
使用适当的函数（如
http\u build\u queryCURLOPT\u SSL\u VERIFYHOST，0