php - 我正在尝试在 php 中使用亚马逊 api 代码，但它给了我不支持版本的错误，以下是我的代码

Question

以下是我与 php 一起使用以通过 amazon api 服务获取 xml 响应的代码，但它给我的错误代码如下所述。

<?php

// Your AWS Access Key ID, as taken from the AWS Your Account page
$aws_access_key_id = "A*********A";

// Your AWS Secret Key corresponding to the above ID, as taken from the AWS Your Account page
$aws_secret_key = "ue*******s+";

// The region you are interested in
$endpoint = "webservices.amazon.in";

$uri = "/onca/xml";

$params = array(
    "Service" => "AWSECommerceService",
    "Operation" => "ItemSearch",
    "AWSAccessKeyId" => "AKIAJYSYWXDOF5CWIK5A",
    "AssociateTag" => "unity0f-21",
    "SearchIndex" => "All",
    "Keywords" => "iphone",
    "ResponseGroup" => "Images,ItemAttributes,Offers"
);

// 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."\"";

?>

它给出了错误，因为版本不受支持，我尝试了一切，但仍然发生错误，请帮助
xml文件请求响应如下:

 <?xml version="1.0"?>
    <ItemSearchErrorResponse
        xmlns="http://ecs.amazonaws.com/doc/2005-10-05/">
        <Error>
            <Code>UnsupportedVersion</Code>
            <Message>Version 2005-10-05 is unsupported. Please use 2011-08-01 or greater instead.</Message>
        </Error>
        <RequestId>9f95a47d-f593-4002-af01-85b1b12fdf2d</RequestId>
    </ItemSearchErrorResponse>

Answer 1

将有效版本添加到您的 $params 数组，例如:

"ResponseGroup" => "Images,ItemAttributes,Offers",
"Version" => "2015-10-01"

我测试了您的脚本，发现它适用于上述内容。

问题的原因似乎是，如果您省略版本参数，API 默认为已弃用的值。