在php中使用curl的OAuth 2.0

Question

我需要为OAuth2.0获取access_token和refresh_token来访问Google API，下面的php脚本应该返回一个带有access_token和refresh_token的json，如下所示：

{
  "access_token" : "####",
  "token_type" : "Bearer",
  "expires_in" : 3600,
  "refresh_token" : "####"
}

但是，php脚本只返回这个错误消息：

{
"error" : "invalid_request",
"error_description" : "Client must specify either client_id or client_assertion, not both"
}

$client_id = '###.apps.googleusercontent.com';
$redirect_uri = 'http://localhost/phpConnectToDB/csv/refreshFusionTable.php';
$client_secret = '###';

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "https://accounts.google.com/o/oauth2/token");

$code = $_REQUEST['code'];

curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);


curl_setopt($ch, CURLOPT_POSTFIELDS, array(
'code' => $code,
'client_id' => $clientID,
'client_secret' => $clientSecret,
'redirect_uri' => $redirect_uri,
'grant_type' => 'authorization_code'
));

$data = curl_exec($ch);

var_dump($data);

curl --data "code=###&client_id=###.apps.googleusercontent.com&client_secret=###&redirect_uri=http://localhost/phpConnectToDB/csv/refreshFusionTable.php&grant_type=authorization_code" https://accounts.google.com/o/oauth2/token

Answer 1

    $client_id = '###.apps.googleusercontent.com';
    $client_secret = '###';

    curl_setopt($ch, CURLOPT_POSTFIELDS, array(
    'code' => $code,
    'client_id' => $clientID,
    'client_secret' => $clientSecret,
    'redirect_uri' => $redirect_uri,
    'grant_type' => 'authorization_code'
    ));

    $client_id = '###.apps.googleusercontent.com';
    $redirect_uri = 'http://localhost/phpConnectToDB/csv/refreshFusionTable.php';
    $client_secret = '###';

    $ch = curl_init();
    
    curl_setopt($ch, CURLOPT_URL, "https://accounts.google.com/o/oauth2/token");
    
    curl_setopt($ch, CURLOPT_POST, TRUE);
    
    $code = $_REQUEST['code'];

    // This option is set to TRUE so that the response
    // doesnot get printed and is stored directly in
    // the variable
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    
    curl_setopt($ch, CURLOPT_POSTFIELDS, array(
    'code' => $code,
    'client_id' => $client_id,
    'client_secret' => $client_secret,
    'redirect_uri' => $redirect_uri,
    'grant_type' => 'authorization_code'
    ));

    $data = curl_exec($ch);
    
    var_dump($data);

但我不得不说，google在这里提供了一个误导性的错误信息，因为我没有定义client_id或client_secret，错误信息是：

    {
    "error" : "invalid_request",
    "error_description" : "Client must specify either client_id or client_assertion, not both"
    }