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<?php |
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declare(strict_types=1); |
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namespace Palmtree\Csv; |
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class Downloader extends Writer |
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{ |
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/** |
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* Default headers used to tell client the response is a downloadable, |
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* non-cacheable file. |
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* |
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* @var array<string, string> |
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*/ |
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private $responseHeaders = [ |
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'Content-Type' => 'text/csv', |
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'Content-Description' => 'File Transfer', |
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'Content-Transfer-Encoding' => 'Binary', |
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'Expires' => '0', |
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'Cache-Control' => 'must-revalidate, post-check=0, pre-check=0', |
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'Pragma' => 'public', |
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]; |
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private string $filename; |
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public function __construct(string $filename, iterable $responseHeaders = []) |
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{ |
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$this->filename = $filename; |
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$this->addResponseHeaders($responseHeaders); |
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$this->addResponseHeader('Content-Disposition', sprintf('attachment; filename="%s"', $this->getFilename())); |
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parent::__construct('php://temp'); |
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} |
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public static function download(string $filename, array $data): void |
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{ |
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$downloader = new self($filename); |
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$downloader->setData($data); |
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$downloader->sendResponse(); |
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} |
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/** |
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* Attempts to send the file as a download to the client. |
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*/ |
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public function sendResponse(): void |
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{ |
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$this->getDocument()->trimFinalLineEnding(); |
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if (!headers_sent()) { |
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header(sprintf('Content-Length: %s', $this->getDocument()->getSize())); |
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foreach ($this->getResponseHeaders() as $key => $value) { |
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header("$key: $value"); |
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} |
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} |
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$this->getDocument()->fseek(0); |
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$this->getDocument()->fpassthru(); |
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} |
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public function getResponseHeaders(): array |
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{ |
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return $this->responseHeaders; |
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} |
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public function addResponseHeaders(iterable $headers = []): self |
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{ |
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foreach ($headers as $key => $value) { |
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$this->addResponseHeader($key, $value); |
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} |
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return $this; |
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} |
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public function addResponseHeader(string $key, string $value): void |
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{ |
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$this->responseHeaders[$key] = $value; |
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} |
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public function removeResponseHeader(string $key): void |
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{ |
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unset($this->responseHeaders[$key]); |
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} |
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public function getFilename(): string |
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{ |
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return $this->filename; |
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} |
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} |
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palmtreephp /
csv
