从亚马逊获取“授权服务器不支持授权授予类型”

Question

我正在尝试获取访问令牌，否，我遇到此错误

{“ error_description”：“授权服务器不支持授权授予类型”，“ error”：“ unsupported_grant_type”}

$code =  $_GET['code'];

$postfields = array(
    'grant_type'=>'authorization_code',
    'code'=>$code,
    'redirect_uri='=>'example/myTest.php',
    'client_id'=>'amzn1.application-oa2-client.xxxxxxxxxxx',
    'client_secret'=>'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
    );
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://api.amazon.com/auth/o2/token');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/x-www-form-urlencoded']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($httpRequest, CURLOPT_HEADER, 1);
// Edit: prior variable $postFields should be $postfields;
curl_setopt($ch, CURLOPT_POSTFIELDS, $postfields);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); // On dev server only!
$result = curl_exec($ch);

print_r($result);

Answer 1

更改CURLOPT_HTTPHEADER自

Content-Type: application/x-www-form-urlencoded

到

Content-Type: application/json

Answer 2

尝试添加'token_type' => 'bearer'到您的$postfields数据中。

以下来自亚马逊开发人员文档：“访问令牌请求...返回的令牌类型。应该是不记名的。”

“访问令牌响应：...unsupported_grant_type 客户端指定了错误的 token_type。”