php - 使用 wp_remote_post 时出现 415 错误 "Unsupported Media Type"

Question

我尝试从 WordPress 向外部 API 发送 POST 请求(在 CRM 系统中为用户分配标签)。当我使用 cURL 时，一切正常。这是 curl 代码:

function my_function () {

$body = array ( 'tags' => array ( array (
                        'email' => 'xxx@gmail.com',
                        'tag' => 'Customer5'
                        ))
);

$curl = curl_init();

curl_setopt_array($curl, array(

  CURLOPT_URL => "$api_url",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode($body, true),
  CURLOPT_HTTPHEADER => array(
    "Content-Type: application/json",
    "User-Agent: Your App Name (www.yourapp.com)",
    "Authorization: Basic xxxxxx"
  ),
));

$response = curl_exec($curl);

curl_close($curl);

var_dump($response);

}

add_action( 'init', 'my_function'); 

但后来我改用 wp_remote_post ，我收到了“415 - 不支持的媒体类型”响应。

$body = array ( 'tags' => array (
                            array(
                                'email' => 'xxx@gmail.com',
                                'tag' => 'Customer5'
                            ))
);

$headers = array (
                'Content-Type' => 'application/json',
                'User-Agent' => 'Your App Name (www.yourapp.com)',
                'Authorization' => 'Basic xxxxxx',
);

$request = wp_remote_post('$api_url', $arg );

$arg = array (
    'header' => $headers,
    'body' => json_encode($body, true),
    'method' => 'POST',
    'sslverify' => false,
);

echo '<pre>';
print_r($request);
echo '</pre>';

我尝试了很多修改(将关联数组格式更改为键:值对，将 AddType 添加到 htaccess 文件...)，但没有任何效果。请帮忙，我被卡住了

Answer 1

摘自KeyCDN :

A 415 Unsupported Media Type error occurs when the origin serverrefuses a particular request since the resource is in a format that is not supported by the server for the HTTPmethodused. This unsupported format type issue can be caused by what isdefined in the resource's Content-Type or Content-Encodingheaders.

在您的情况下，错误很可能是因为您的远程请求发送了错误的 Content-Type header — 默认为 application/x-www-form-urlencoded当 HTTP 方法为 POST 时。
是的，您确实包含了正确的 Content-Type您的值(value) $headers大批。但不幸的是在您的 $arg您传递给 wp_remote_post() 的数组, 你使用了错误的数组键 — header ，实际上应该是 headers (注意“s”)。
所以使用 headers而不是 header ，正如你在下面看到的:

$api_url = 'your API URL';

$body = array(
    'tags' => array(
        array(
            'email' => 'xxx@gmail.com',
            'tag'   => 'Customer5',
        ),
    ),
);

$headers = array(
    'Content-Type'  => 'application/json',
    'User-Agent'    => 'Your App Name (www.yourapp.com)',
    'Authorization' => 'Basic xxxxxx',
);

$arg = array(
    'headers'   => $headers, // good
//  'header'    => $headers, // bad; i.e. wrong array key ('header')
    'body'      => json_encode( $body ),
    // 'method' can be omitted since you're using wp_remote_post()
    'method'    => 'POST',
    'sslverify' => false,
);

$request = wp_remote_post( $api_url, $arg );
// ..if the response still isn't good, what's the output of this:
var_dump( $request );