Exception
11 months ago
CloudFrontClient.php
11 months ago
CookieSigner.php
11 months ago
Signer.php
11 months ago
UrlSigner.php
11 months ago
UrlSigner.php
120 lines
| 1 | <?php |
| 2 | namespace Aws\CloudFront; |
| 3 | |
| 4 | use GuzzleHttp\Psr7; |
| 5 | use GuzzleHttp\Psr7\Uri; |
| 6 | use Psr\Http\Message\UriInterface; |
| 7 | |
| 8 | /** |
| 9 | * Creates signed URLs for Amazon CloudFront resources. |
| 10 | */ |
| 11 | class UrlSigner |
| 12 | { |
| 13 | private $signer; |
| 14 | |
| 15 | /** |
| 16 | * @param $keyPairId string ID of the key pair |
| 17 | * @param $privateKey string Path to the private key used for signing |
| 18 | * |
| 19 | * @throws \RuntimeException if the openssl extension is missing |
| 20 | * @throws \InvalidArgumentException if the private key cannot be found. |
| 21 | */ |
| 22 | public function __construct($keyPairId, $privateKey) |
| 23 | { |
| 24 | $this->signer = new Signer($keyPairId, $privateKey); |
| 25 | } |
| 26 | |
| 27 | /** |
| 28 | * Create a signed Amazon CloudFront URL. |
| 29 | * |
| 30 | * Keep in mind that URLs meant for use in media/flash players may have |
| 31 | * different requirements for URL formats (e.g. some require that the |
| 32 | * extension be removed, some require the file name to be prefixed |
| 33 | * - mp4:<path>, some require you to add "/cfx/st" into your URL). |
| 34 | * |
| 35 | * @param string $url URL to sign (can include query |
| 36 | * string string and wildcards) |
| 37 | * @param string|integer|null $expires UTC Unix timestamp used when signing |
| 38 | * with a canned policy. Not required |
| 39 | * when passing a custom $policy. |
| 40 | * @param string $policy JSON policy. Use this option when |
| 41 | * creating a signed URL for a custom |
| 42 | * policy. |
| 43 | * |
| 44 | * @return string The file URL with authentication parameters |
| 45 | * @throws \InvalidArgumentException if the URL provided is invalid |
| 46 | * @link http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/WorkingWithStreamingDistributions.html |
| 47 | */ |
| 48 | public function getSignedUrl($url, $expires = null, $policy = null) |
| 49 | { |
| 50 | // Determine the scheme of the url |
| 51 | $urlSections = explode('://', $url); |
| 52 | |
| 53 | if (count($urlSections) < 2) { |
| 54 | throw new \InvalidArgumentException("Invalid URL: {$url}"); |
| 55 | } |
| 56 | |
| 57 | // Get the real scheme by removing wildcards from the scheme |
| 58 | $scheme = str_replace('*', '', $urlSections[0]); |
| 59 | $uri = new Uri($scheme . '://' . $urlSections[1]); |
| 60 | $query = Psr7\Query::parse($uri->getQuery(), PHP_QUERY_RFC3986); |
| 61 | $signature = $this->signer->getSignature( |
| 62 | $this->createResource($scheme, (string) $uri), |
| 63 | $expires, |
| 64 | $policy |
| 65 | ); |
| 66 | $uri = $uri->withQuery( |
| 67 | http_build_query($query + $signature, '', '&', PHP_QUERY_RFC3986) |
| 68 | ); |
| 69 | |
| 70 | return $scheme === 'rtmp' |
| 71 | ? $this->createRtmpUrl($uri) |
| 72 | : (string) $uri; |
| 73 | } |
| 74 | |
| 75 | private function createRtmpUrl(UriInterface $uri) |
| 76 | { |
| 77 | // Use a relative URL when creating Flash player URLs |
| 78 | $result = ltrim($uri->getPath(), '/'); |
| 79 | |
| 80 | if ($query = $uri->getQuery()) { |
| 81 | $result .= '?' . $query; |
| 82 | } |
| 83 | |
| 84 | return $result; |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * @param $scheme |
| 89 | * @param $url |
| 90 | * |
| 91 | * @return string |
| 92 | */ |
| 93 | private function createResource($scheme, $url) |
| 94 | { |
| 95 | switch ($scheme) { |
| 96 | case 'http': |
| 97 | case 'http*': |
| 98 | case 'https': |
| 99 | return $url; |
| 100 | case 'rtmp': |
| 101 | $parts = parse_url($url); |
| 102 | $pathParts = pathinfo($parts['path']); |
| 103 | $resource = ltrim( |
| 104 | $pathParts['dirname'] . '/' . $pathParts['basename'], |
| 105 | '/' |
| 106 | ); |
| 107 | |
| 108 | // Add a query string if present. |
| 109 | if (isset($parts['query'])) { |
| 110 | $resource .= "?{$parts['query']}"; |
| 111 | } |
| 112 | |
| 113 | return $resource; |
| 114 | } |
| 115 | |
| 116 | throw new \InvalidArgumentException("Invalid URI scheme: {$scheme}. " |
| 117 | . "Scheme must be one of: http, https, or rtmp"); |
| 118 | } |
| 119 | } |
| 120 |