public static function SignRequest($accessKey, BaseRequest &$request)
{
$canonicalizedMNSHeaders = "";
$headers = $request->getHeaders();
$contentMd5 = "";
if (isset($headers['Content-MD5'])) {
$contentMd5 = $headers['Content-MD5'];
}
$contentType = "";
if (isset($headers['Content-Type'])) {
$contentType = $headers['Content-Type'];
}
$date = $headers['Date'];
$queryString = $request->getQueryString();
$canonicalizedResource = $request->getResourcePath();
if ($queryString != NULL) {
$canonicalizedResource .= "?" . $request->getQueryString();
}
if (0 !== strpos($canonicalizedResource, "/")) {
$canonicalizedResource = "/" . $canonicalizedResource;
}
$tmpHeaders = array();
foreach ($headers as $key => $value) {
if (0 === strpos($key, Constants::MNS_HEADER_PREFIX)) {
$tmpHeaders[$key] = $value;
}
}
ksort($tmpHeaders);
$canonicalizedMNSHeaders = implode("\n", array_map(function ($v, $k) {
return $k . ":" . $v;
}, $tmpHeaders, array_keys($tmpHeaders)));
$stringToSign = strtoupper($request->getMethod()) . "\n" . $contentMd5 . "\n" . $contentType . "\n" . $date . "\n" . $canonicalizedMNSHeaders . "\n" . $canonicalizedResource;
return base64_encode(hash_hmac("sha1", $stringToSign, $accessKey, $raw_output = TRUE));
}