public static function buildCanonicalString(HttpRequest $request, $bucket, $objectKey)
{
$buildString = $request->getMethod() . self::$NEW_LINE;
$headersToSign = array();
foreach ($request->getHeaders() as $key => $value) {
if (empty($key)) {
continue;
}
$lowerKey = strtolower($key);
if ($lowerKey == strtolower(OSSHeaders::CONTENT_TYPE) || $lowerKey == strtolower(OSSHeaders::CONTENT_MD5) || $lowerKey == strtolower(OSSHeaders::DATE) || strpos($lowerKey, OSSHeaders::OSS_PREFIX) === 0) {
$headersToSign[$lowerKey] = $value;
}
}
if (!isset($headersToSign[strtolower(OSSHeaders::CONTENT_TYPE)])) {
$headersToSign[strtolower(OSSHeaders::CONTENT_TYPE)] = '';
}
if (!isset($headersToSign[strtolower(OSSHeaders::CONTENT_MD5)])) {
$headersToSign[strtolower(OSSHeaders::CONTENT_MD5)] = '';
}
// Add querys that have the prefix "x-oss-"
foreach ($request->getParameters() as $key => $value) {
if (strpos($key, OSSHeaders::OSS_PREFIX) === 0) {
$headersToSign[$key] = $value;
}
}
// Sort
ksort($headersToSign);
// Add all headers to sign to the builder
foreach ($headersToSign as $key => $value) {
if (strpos($key, OSSHeaders::OSS_PREFIX) === 0) {
$buildString = $buildString . $key . ':' . $value;
} else {
$buildString .= $value;
}
$buildString .= self::$NEW_LINE;
}
return $buildString . self::buildCanonicalizedResource(self::buildResourcePath($bucket, $objectKey), $request->getParameters());
}
