以下是代码：
$client_id = '';
$client_secret = '';
$callback_url = '';
$buffer = new BufferApp($client_id, $client_secret, $callback_url);
if (!$buffer->ok) {
echo '<a href="' . $buffer->get_login_url() . '">Connect to Buffer!</a>';
} else {
//this pulls all of the logged in user's profiles
$profiles = $buffer->go('/profiles');
if (is_array($profiles)) {
foreach ($profiles as $profile) {
//this creates a status on each one
$buffer->go('/updates/create', array('text' => 'My first status update from bufferapp-php worked!', 'profile_ids[]' => $profile->id));
}
}
}
if (isset($_GET['code']))
{
var_dump($_SESSION['oauth']['buffer']['access_token']);
}
这是一个示例代码，我必须返回access_token，但它是NULL
尝试登录我被重定向到bufferapp'站点，提供访问权限，然后我被重定向回来并且它是NULL
问题是什么？
提前感谢）
bufferapi代码：
class BufferApp {
private $client_id;
private $client_secret;
private $code;
private $access_token;
private $callback_url;
private $authorize_url = 'https://bufferapp.com/oauth2/authorize';
private $access_token_url = 'https://api.bufferapp.com/1/oauth2/token.json';
private $buffer_url = 'https://api.bufferapp.com/1';
public $ok = false;
private $endpoints = array(
'/user' => 'get',
'/profiles' => 'get',
'/profiles/:id/schedules/update' => 'post', // Array schedules [0][days][]=mon, [0][times][]=12:00
'/profiles/:id/updates/reorder' => 'post', // Array order, int offset, bool utc
'/profiles/:id/updates/pending' => 'get',
'/profiles/:id/updates/sent' => 'get',
'/profiles/:id/schedules' => 'get',
'/profiles/:id' => 'get',
'/updates/:id/update' => 'post', // String text, Bool now, Array media ['link'], ['description'], ['picture'], Bool utc
'/updates/create' => 'post', // String text, Array profile_ids, Aool shorten, Bool now, Array media ['link'], ['description'], ['picture']
'/updates/:id/destroy' => 'post',
'/updates/:id' => 'get',
'/links/shares' => 'get',
);
public $errors = array(
'invalid-endpoint' => 'The endpoint you supplied does not appear to be valid.',
'403' => 'Permission denied.',
'404' => 'Endpoint not found.',
'405' => 'Method not allowed.',
'1000' => 'An unknown error occurred.',
'1001' => 'Access token required.',
'1002' => 'Not within application scope.',
'1003' => 'Parameter not recognized.',
'1004' => 'Required parameter missing.',
'1005' => 'Unsupported response format.',
'1010' => 'Profile could not be found.',
'1011' => 'No authorization to access profile.',
'1012' => 'Profile did not save successfully.',
'1013' => 'Profile schedule limit reached.',
'1014' => 'Profile limit for user has been reached.',
'1020' => 'Update could not be found.',
'1021' => 'No authorization to access update.',
'1022' => 'Update did not save successfully.',
'1023' => 'Update limit for profile has been reached.',
'1024' => 'Update limit for team profile has been reached.',
'1028' => 'Update soft limit for profile reached.',
'1030' => 'Media filetype not supported.',
'1031' => 'Media filesize out of acceptable range.',
);
public $responses = array(
'403' => 'Permission denied.',
'404' => 'Endpoint not found.',
'405' => 'Method not allowed.',
'500' => 'An unknown error occurred.',
'403' => 'Access token required.',
'403' => 'Not within application scope.',
'400' => 'Parameter not recognized.',
'400' => 'Required parameter missing.',
'406' => 'Unsupported response format.',
'404' => 'Profile could not be found.',
'403' => 'No authorization to access profile.',
'400' => 'Profile did not save successfully.',
'403' => 'Profile schedule limit reached.',
'403' => 'Profile limit for user has been reached.',
'404' => 'Update could not be found.',
'403' => 'No authorization to access update.',
'400' => 'Update did not save successfully.',
'403' => 'Update limit for profile has been reached.',
'403' => 'Update limit for team profile has been reached.',
'403' => 'Update soft limit for profile reached.',
'400' => 'Media filetype not supported.',
'400' => 'Media filesize out of acceptable range.',
);
function __construct($client_id = '', $client_secret = '', $callback_url = '') {
if ($client_id) $this->set_client_id($client_id);
if ($client_secret) $this->set_client_secret($client_secret);
if ($callback_url) $this->set_callback_url($callback_url);
if ($_GET['code']) {
$this->code = $_GET['code'];
$this->create_access_token_url();
}
$this->retrieve_access_token();
}
function go($endpoint = '', $data = '') {
if (in_array($endpoint, array_keys($this->endpoints))) {
$done_endpoint = $endpoint;
} else {
$ok = false;
foreach (array_keys($this->endpoints) as $done_endpoint) {
if (preg_match('/' . preg_replace('/(\:\w+)/i', '(\w+)', str_replace('/', '\/', $done_endpoint)) . '/i', $endpoint, $match)) {
$ok = true;
break;
}
}
if (!$ok) return $this->error('invalid-endpoint');
}
if (!$data || !is_array($data)) $data = array();
$data['access_token'] = $this->access_token;
$method = $this->endpoints[$done_endpoint]; //get() or post()
return $this->$method($this->buffer_url . $endpoint . '.json', $data);
}
function store_access_token() {
$_SESSION['oauth']['buffer']['access_token'] = $this->access_token;
}
function retrieve_access_token() {
$this->access_token = $_SESSION['oauth']['buffer']['access_token'];
if ($this->access_token) {
$this->ok = true;
}
}
function error($error) {
return (object) array('error' => $this->errors[$error]);
}
function create_access_token_url() {
$data = array(
'code' => $this->code,
'grant_type' => 'authorization_code',
'client_id' => $this->client_id,
'client_secret' => $this->client_secret,
'redirect_uri' => $this->callback_url,
);
$obj = $this->post($this->access_token_url, $data);
$this->access_token = $obj->access_token;
$this->store_access_token();
}
function req($url = '', $data = '', $post = true) {
if (!$url) return false;
if (!$data || !is_array($data)) $data = array();
$options = array(CURLOPT_RETURNTRANSFER => true, CURLOPT_HEADER => false);
if ($post) {
$options += array(
CURLOPT_POST => $post,
CURLOPT_POSTFIELDS => $data
);
} else {
$url .= '?' . http_build_query($data);
}
$ch = curl_init($url);
curl_setopt_array($ch, $options);
$rs = curl_exec($ch);
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if ($code >= 400) {
return $this->error($code);
}
return json_decode($rs);
}
function get($url = '', $data = '') {
return $this->req($url, $data, false);
}
function post($url = '', $data = '') {
return $this->req($url, $data, true);
}
function get_login_url() {
return $this->authorize_url . '?'
. 'client_id=' . $this->client_id
. '&redirect_uri=' . urlencode($this->callback_url)
. '&response_type=code';
}
function set_client_id($client_id) {
$this->client_id = $client_id;
}
function set_client_secret($client_secret) {
$this->client_secret = $client_secret;
}
function set_callback_url($callback_url) {
$this->callback_url = $callback_url;
}
}