/**
* Create the signature string
*
* @param string $access_key
* @return string
*/
public function create($access_key)
{
$str = $this->build->getMethod() . "\n";
$str .= $this->headers['Content-Md5'] . "\n";
$str .= $this->headers['Content-Type'] . "\n";
$str .= $this->headers['Date'] . "\n";
foreach ($this->oss_headers as $k => $v) {
$str .= $k . ':' . $v . "\n";
}
$str .= $this->build->getPath();
$params = [];
$overrides = [];
foreach ($this->params as $k => $v) {
if (in_array($k, $this->param_keys)) {
$params[$k] = $v;
}
}
foreach ($this->overrides as $k => $v) {
if (in_array($k, $this->override_keys)) {
$overrides[$k] = $v;
}
}
$query = array_merge($params, $overrides);
$query_str = http_build_query($query);
if (!empty($query_str)) {
$query_str = str_replace('acl=', 'acl', $query_str);
$str .= '?' . $query_str;
}
return base64_encode(hash_hmac('sha1', $str, $access_key, true));
}
