/**
* Call API method over HTTP and return raw data
* @param string API method, e.g. "users/show"
* @param array method arguments
* @param string http request method
* @return array unserialized data returned from twitter
* @throws TwitterApiException
*/
public function call($path, array $_args, $http_method)
{
// all calls must be authenticated in API 1.1
if (!$this->has_auth()) {
throw new TwitterApiException(__('Twitter client not authenticated', 'twitter-api'), 0, 401);
}
// transform some arguments and ensure strings
// no further validation is performed
$args = array();
foreach ($_args as $key => $val) {
if (is_string($val)) {
$args[$key] = $val;
} else {
if (true === $val) {
$args[$key] = 'true';
} else {
if (false === $val || null === $val) {
$args[$key] = 'false';
} else {
if (!is_scalar($val)) {
throw new TwitterApiException(__('Invalid Twitter parameter', 'twitter-api') . ' (' . gettype($val) . ') ' . $key . ' in ' . $path, -1);
} else {
$args[$key] = (string) $val;
}
}
}
}
}
// Fetch response from cache if possible / allowed / enabled
if ($http_method === 'GET' && isset($this->cache_ttl)) {
$cachekey = $this->cache_ns . $path . '_' . md5(serialize($args));
if (preg_match('/^(\\d+)-/', $this->AccessToken->key, $reg)) {
$cachekey .= '_' . $reg[1];
}
$data = _twitter_api_cache_get($cachekey);
if (is_array($data)) {
return $data;
}
}
// @todo could validate args against endpoints here.
// Using Wordpress WP_Http for requests, see class-http.php
$conf = array('method' => $http_method, 'redirection' => 0);
// build signed URL and request parameters
$endpoint = TWITTER_API_BASE . '/' . $path . '.json';
$params = new TwitterOAuthParams($args);
$params->set_consumer($this->Consumer);
$params->set_token($this->AccessToken);
$params->sign_hmac($http_method, $endpoint);
if ('GET' === $http_method) {
$endpoint .= '?' . $params->serialize();
} else {
//$conf['headers'] = $params->oauth_header();
$conf['body'] = $params->serialize();
}
$http = self::http_request($endpoint, $conf);
$data = json_decode($http['body'], true);
$status = $http['response']['code'];
// remember current rate limits for this endpoint
$this->last_call = $path;
if (isset($http['headers']['x-rate-limit-limit'])) {
$this->last_rate[$path] = array('limit' => (int) $http['headers']['x-rate-limit-limit'], 'remaining' => (int) $http['headers']['x-rate-limit-remaining'], 'reset' => (int) $http['headers']['x-rate-limit-reset']);
}
// unserializable array assumed to be serious error
if (!is_array($data)) {
$err = array('message' => '', 'code' => -1);
TwitterApiException::chuck($err, $status);
}
// else could be well-formed error
if (isset($data['errors'])) {
while ($err = array_shift($data['errors'])) {
$err['message'] = __($err['message'], 'twitter-api');
if ($data['errors']) {
$message = sprintf(__('Twitter error #%d', 'twitter-api'), $err['code']) . ' "' . $err['message'] . '"';
trigger_error($message, E_USER_WARNING);
} else {
TwitterApiException::chuck($err, $status);
}
}
}
// some errors appear to use a single key and have no code
// e.g. not authorized to view specific content.
if (isset($data['error'])) {
$code = isset($data['code']) ? $data['code'] : $status;
$message = sprintf(__('Twitter error #%d', 'twitter-api'), $code) . ' "' . $data['error'] . '"';
TwitterApiException::chuck(compact('message', 'code'), $status);
}
if (isset($cachekey)) {
_twitter_api_cache_set($cachekey, $data, $this->cache_ttl);
}
return $data;
}
/**
* Sign and execute REST API call
* @return array
*/
private function rest_request($path, array $args, $http_method)
{
// all calls must be authenticated in API 1.1
if (!$this->has_auth()) {
throw new TwitterApiException('Twitter client not authenticated', 0, 401);
}
// prepare HTTP request config
$conf = array('method' => $http_method);
// build signed URL and request parameters
$endpoint = TWITTER_API_BASE . '/' . $path . '.json';
$params = new TwitterOAuthParams($args);
$params->set_consumer($this->Consumer);
$params->set_token($this->AccessToken);
$params->sign_hmac($http_method, $endpoint);
if ('GET' === $http_method) {
$endpoint .= '?' . $params->serialize();
} else {
$conf['body'] = $params->serialize();
}
$http = self::http_request($endpoint, $conf);
// remember current rate limits for this endpoint
$this->last_call = $path;
if (isset($http['headers']['x-rate-limit-limit'])) {
$this->last_rate[$path] = array('limit' => (int) $http['headers']['x-rate-limit-limit'], 'remaining' => (int) $http['headers']['x-rate-limit-remaining'], 'reset' => (int) $http['headers']['x-rate-limit-reset']);
}
return $http;
}
