signer = new Signer($keyPairId, $privateKey); } /** * Create a signed Amazon CloudFront URL. * * Keep in mind that URLs meant for use in media/flash players may have * different requirements for URL formats (e.g. some require that the * extension be removed, some require the file name to be prefixed * - mp4:, some require you to add "/cfx/st" into your URL). * * @param string $url URL to sign (can include query * string string and wildcards) * @param string|integer|null $expires UTC Unix timestamp used when signing * with a canned policy. Not required * when passing a custom $policy. * @param string $policy JSON policy. Use this option when * creating a signed URL for a custom * policy. * * @return string The file URL with authentication parameters * @throws \InvalidArgumentException if the URL provided is invalid * @link http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/WorkingWithStreamingDistributions.html */ public function getSignedUrl($url, $expires = null, $policy = null) { // Determine the scheme of the url $urlSections = explode('://', $url); if (count($urlSections) < 2) { throw new \InvalidArgumentException("Invalid URL: {$url}"); } // Get the real scheme by removing wildcards from the scheme $scheme = str_replace('*', '', $urlSections[0]); $uri = new Uri($scheme . '://' . $urlSections[1]); $query = Psr7\Query::parse($uri->getQuery(), PHP_QUERY_RFC3986); $signature = $this->signer->getSignature( $this->createResource($scheme, (string) $uri), $expires, $policy ); $uri = $uri->withQuery( http_build_query($query + $signature, '', '&', PHP_QUERY_RFC3986) ); return $scheme === 'rtmp' ? $this->createRtmpUrl($uri) : (string) $uri; } private function createRtmpUrl(UriInterface $uri) { // Use a relative URL when creating Flash player URLs $result = ltrim($uri->getPath(), '/'); if ($query = $uri->getQuery()) { $result .= '?' . $query; } return $result; } /** * @param $scheme * @param $url * * @return string */ private function createResource($scheme, $url) { switch ($scheme) { case 'http': case 'http*': case 'https': return $url; case 'rtmp': $parts = parse_url($url); $pathParts = pathinfo($parts['path']); $resource = ltrim( $pathParts['dirname'] . '/' . $pathParts['basename'], '/' ); // Add a query string if present. if (isset($parts['query'])) { $resource .= "?{$parts['query']}"; } return $resource; } throw new \InvalidArgumentException("Invalid URI scheme: {$scheme}. " . "Scheme must be one of: http, https, or rtmp"); } }