我正在探索亚马逊产品广告 API（PA 5）。我正在使用 GetItems 方法。 API 不返回评分和评论计数。我已经使用亚马逊的暂存器平台以及 PHP 代码来执行相同的操作，但没有成功。我只得到了亚马逊客户支持的一般答复，因为他们说必须参考有关此问题的在线论坛，并且他们无法提供关于为什么未返回以下数据的解决方案/解释。
这是我使用暂存器得到的 JSON 响应。
{
"ItemIds": [
"B085WLFSJ1"
],
"Resources": [
"CustomerReviews.Count"
],
"PartnerType": "Associates",
"Marketplace": "www.amazon.com",
"Operation": "GetItems"
}
这是我正在使用的PHP代码
<?php
$serviceName="ProductAdvertisingAPI";
$region="us-east-1";
$accessKey="myaccesskey";
$secretKey="mysecretkey";
$payload="{"
." \"ItemIds\": ["
." \"B083JKTMYQ\""
." ],"
." \"Resources\": ["
." \"CustomerReviews.Count\","
." \"CustomerReviews.StarRating\","
." \"Images.Primary.Small\","
." \"Images.Primary.Medium\","
." \"Images.Primary.Large\","
." \"Images.Variants.Small\","
." \"Images.Variants.Medium\","
." \"Images.Variants.Large\""
." ],"
." \"PartnerTag\": \"sleephall08-20\","
." \"PartnerType\": \"Associates\","
." \"Marketplace\": \"www.amazon.com\""
."}";
$host="webservices.amazon.com";
$uriPath="/paapi5/getitems";
$awsv4 = new AwsV4 ($accessKey, $secretKey);
$awsv4->setRegionName($region);
$awsv4->setServiceName($serviceName);
$awsv4->setPath ($uriPath);
$awsv4->setPayload ($payload);
$awsv4->setRequestMethod ("POST");
$awsv4->addHeader ('content-encoding', 'amz-1.0');
$awsv4->addHeader ('content-type', 'application/json; charset=utf-8');
$awsv4->addHeader ('host', $host);
$awsv4->addHeader ('x-amz-target', 'com.amazon.paapi5.v1.ProductAdvertisingAPIv1.GetItems');
$headers = $awsv4->getHeaders ();
$headerString = "";
foreach ( $headers as $key => $value ) {
$headerString .= $key . ': ' . $value . "\r\n";
}
$params = array (
'http' => array (
'header' => $headerString,
'method' => 'POST',
'content' => $payload
)
);
$stream = stream_context_create ( $params );
$fp = @fopen ( 'https://'.$host.$uriPath, 'rb', false, $stream );
if (! $fp) {
throw new Exception ( "Exception Occured" );
}
$response = @stream_get_contents ( $fp );
if ($response === false) {
throw new Exception ( "Exception Occured" );
}
echo $response;
class AwsV4 {
private $accessKey = null;
private $secretKey = null;
private $path = null;
private $regionName = null;
private $serviceName = null;
private $httpMethodName = null;
private $queryParametes = array ();
private $awsHeaders = array ();
private $payload = "";
private $HMACAlgorithm = "AWS4-HMAC-SHA256";
private $aws4Request = "aws4_request";
private $strSignedHeader = null;
private $xAmzDate = null;
private $currentDate = null;
public function __construct($accessKey, $secretKey) {
$this->accessKey = $accessKey;
$this->secretKey = $secretKey;
$this->xAmzDate = $this->getTimeStamp ();
$this->currentDate = $this->getDate ();
}
function setPath($path) {
$this->path = $path;
}
function setServiceName($serviceName) {
$this->serviceName = $serviceName;
}
function setRegionName($regionName) {
$this->regionName = $regionName;
}
function setPayload($payload) {
$this->payload = $payload;
}
function setRequestMethod($method) {
$this->httpMethodName = $method;
}
function addHeader($headerName, $headerValue) {
$this->awsHeaders [$headerName] = $headerValue;
}
private function prepareCanonicalRequest() {
$canonicalURL = "";
$canonicalURL .= $this->httpMethodName . "\n";
$canonicalURL .= $this->path . "\n" . "\n";
$signedHeaders = '';
foreach ( $this->awsHeaders as $key => $value ) {
$signedHeaders .= $key . ";";
$canonicalURL .= $key . ":" . $value . "\n";
}
$canonicalURL .= "\n";
$this->strSignedHeader = substr ( $signedHeaders, 0, - 1 );
$canonicalURL .= $this->strSignedHeader . "\n";
$canonicalURL .= $this->generateHex ( $this->payload );
return $canonicalURL;
}
private function prepareStringToSign($canonicalURL) {
$stringToSign = '';
$stringToSign .= $this->HMACAlgorithm . "\n";
$stringToSign .= $this->xAmzDate . "\n";
$stringToSign .= $this->currentDate . "/" . $this->regionName . "/" . $this->serviceName . "/" . $this->aws4Request . "\n";
$stringToSign .= $this->generateHex ( $canonicalURL );
return $stringToSign;
}
private function calculateSignature($stringToSign) {
$signatureKey = $this->getSignatureKey ( $this->secretKey, $this->currentDate, $this->regionName, $this->serviceName );
$signature = hash_hmac ( "sha256", $stringToSign, $signatureKey, true );
$strHexSignature = strtolower ( bin2hex ( $signature ) );
return $strHexSignature;
}
public function getHeaders() {
$this->awsHeaders ['x-amz-date'] = $this->xAmzDate;
ksort ( $this->awsHeaders );
// Step 1: CREATE A CANONICAL REQUEST
$canonicalURL = $this->prepareCanonicalRequest ();
// Step 2: CREATE THE STRING TO SIGN
$stringToSign = $this->prepareStringToSign ( $canonicalURL );
// Step 3: CALCULATE THE SIGNATURE
$signature = $this->calculateSignature ( $stringToSign );
// Step 4: CALCULATE AUTHORIZATION HEADER
if ($signature) {
$this->awsHeaders ['Authorization'] = $this->buildAuthorizationString ( $signature );
return $this->awsHeaders;
}
}
private function buildAuthorizationString($strSignature) {
return $this->HMACAlgorithm . " " . "Credential=" . $this->accessKey . "/" . $this->getDate () . "/" . $this->regionName . "/" . $this->serviceName . "/" . $this->aws4Request . "," . "SignedHeaders=" . $this->strSignedHeader . "," . "Signature=" . $strSignature;
}
private function generateHex($data) {
return strtolower ( bin2hex ( hash ( "sha256", $data, true ) ) );
}
private function getSignatureKey($key, $date, $regionName, $serviceName) {
$kSecret = "AWS4" . $key;
$kDate = hash_hmac ( "sha256", $date, $kSecret, true );
$kRegion = hash_hmac ( "sha256", $regionName, $kDate, true );
$kService = hash_hmac ( "sha256", $serviceName, $kRegion, true );
$kSigning = hash_hmac ( "sha256", $this->aws4Request, $kService, true );
return $kSigning;
}
private function getTimeStamp() {
return gmdate ( "Ymd\THis\Z" );
}
private function getDate() {
return gmdate ( "Ymd" );
}
}
?>
<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://get.scrapehero.com/amz/product-reviews/?x-api-key=q9LJPUmr7e/TtEi/noQ0NeJ9kO/JGMEGctsDH/oK&asin=B07NFTVP7P&country_code=US&page=1&sort=top",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "GET",
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
?>
任何有关这方面的帮助都会很棒。
您需要在负载中添加 Offers.Listings.MerchantInfo。
然后从此返回字段获取计数和评级。它仅返回最近 30 天的反馈，因此与亚马逊上列出的反馈不匹配。
[MerchantInfo] => stdClass Object
(
[DefaultShippingCountry] => CN
[FeedbackCount] => 984
[FeedbackRating] => 4.89
[Id] => A1BKFNLPFGJ063
[Name] => Uineko
)