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| 1 | <?php |
| 2 | |
| 3 | namespace Miniframe\Response; |
| 4 | |
| 5 | use Miniframe\Core\Response; |
| 6 | |
| 7 | class StreamResponse extends Response |
| 8 | { |
| 9 | /** |
| 10 | * Resource of a stream. |
| 11 | * |
| 12 | * @var resource |
| 13 | */ |
| 14 | private $resource; |
| 15 | |
| 16 | /** |
| 17 | * Disposition options |
| 18 | */ |
| 19 | public const |
| 20 | DISPOSITION_ATTACHMENT = 1, |
| 21 | DISPOSITION_INLINE = 2 |
| 22 | ; |
| 23 | |
| 24 | /** |
| 25 | * Streams a resource back to the client |
| 26 | * |
| 27 | * @param resource $resource Resource of a stream (`$resource = fopen('/path/to/large-file.zip', 'r');`). |
| 28 | * @param string|null $filename Name of the file. |
| 29 | * @param string|null $contentType Type of the file. |
| 30 | * @param integer $disposition Type of the stream (self::DISPOSITION_ATTACHMENT or self::DISPOSITION_INLINE). |
| 31 | */ |
| 32 | public function __construct( |
| 33 | $resource, |
| 34 | string $filename = null, |
| 35 | string $contentType = null, |
| 36 | int $disposition = self::DISPOSITION_ATTACHMENT |
| 37 | ) { |
| 38 | if (is_resource($resource) === false) { |
| 39 | throw new \InvalidArgumentException( |
| 40 | 'Argument must be a valid resource type. ' . gettype($resource) . ' given.' |
| 41 | ); |
| 42 | } |
| 43 | $this->resource = $resource; |
| 44 | switch ($disposition) { |
| 45 | case self::DISPOSITION_ATTACHMENT: |
| 46 | $dispositionStr = 'attachment'; |
| 47 | break; |
| 48 | case self::DISPOSITION_INLINE: |
| 49 | $dispositionStr = 'inline'; |
| 50 | break; |
| 51 | default: |
| 52 | throw new \InvalidArgumentException( |
| 53 | 'Argument must be a valid disposition. ' . var_export($disposition, true) . ' given.' |
| 54 | ); |
| 55 | } |
| 56 | |
| 57 | // Add Content Type header, when specified |
| 58 | if ($contentType !== null) { |
| 59 | $this->addHeader('Content-type: ' . $contentType); |
| 60 | } |
| 61 | |
| 62 | // Add Content-length and Last-Modified, when known |
| 63 | $stat = fstat($resource); |
| 64 | if (isset($stat['size']) && $stat['size'] > 0) { |
| 65 | $this->addHeader('Content-length: ' . $stat['size']); |
| 66 | } |
| 67 | if (isset($stat['mtime']) && $stat['mtime'] > 0) { |
| 68 | $this->addHeader('Last-Modified: ' . date('r', $stat['mtime'])); |
| 69 | } |
| 70 | |
| 71 | // Transfer is binary |
| 72 | $this->addHeader('Content-Transfer-Encoding: Binary'); |
| 73 | |
| 74 | // Compile Content-disposition header |
| 75 | $contentDisposition = 'Content-disposition: ' . $dispositionStr; |
| 76 | if ($filename !== null) { |
| 77 | $contentDisposition .= '; filename="' . rawurlencode($filename) . '"'; |
| 78 | } |
| 79 | $this->addHeader($contentDisposition); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * Passes thru the stream data to STDOUT. Always returns an empty string. |
| 84 | * |
| 85 | * @return string |
| 86 | */ |
| 87 | public function render(): string |
| 88 | { |
| 89 | $currentLimit = ini_get('max_execution_time'); |
| 90 | set_time_limit(0); |
| 91 | fpassthru($this->resource); |
| 92 | set_time_limit((int)$currentLimit); |
| 93 | fclose($this->resource); |
| 94 | return ''; |
| 95 | } |
| 96 | } |