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Direktori : /home2/selectio/www/limpiar.in.net/updates/vendor/maennchen/zipstream-php/guides/ |
Current File : //home2/selectio/www/limpiar.in.net/updates/vendor/maennchen/zipstream-php/guides/ContentLength.rst |
Adding Content-Length header ============= Adding a ``Content-Length`` header for ``ZipStream`` is not trivial since the size is not known beforehand. The following workaround adds an approximated header: .. code-block:: php class Zip { /** @var string */ private $name; private $files = []; public function __construct($name) { $this->name = $name; } public function addFile($name, $data) { $this->files[] = ['type' => 'addFile', 'name' => $name, 'data' => $data]; } public function addFileFromPath($name, $path) { $this->files[] = ['type' => 'addFileFromPath', 'name' => $name, 'path' => $path]; } public function getEstimate() { $estimate = 22; foreach ($this->files as $file) { $estimate += 76 + 2 * strlen($file['name']); if ($file['type'] === 'addFile') { $estimate += strlen($file['data']); } if ($file['type'] === 'addFileFromPath') { $estimate += filesize($file['path']); } } return $estimate; } public function finish() { header('Content-Length: ' . $this->getEstimate()); $options = new \ZipStream\Option\Archive(); $options->setSendHttpHeaders(true); $options->setEnableZip64(false); $options->setDeflateLevel(-1); $zip = new \ZipStream\ZipStream($this->name, $options); $fileOptions = new \ZipStream\Option\File(); $fileOptions->setMethod(\ZipStream\Option\Method::STORE()); foreach ($this->files as $file) { if ($file['type'] === 'addFile') { $zip->addFile($file['name'], $file['data'], $fileOptions); } if ($file['type'] === 'addFileFromPath') { $zip->addFileFromPath($file['name'], $file['path'], $fileOptions); } } $zip->finish(); exit; } } It only works with the following constraints: - All file content is known beforehand. - Content Deflation is disabled Thanks to `partiellkorrekt <https://github.com/maennchen/ZipStream-PHP/issues/89#issuecomment-1047949274>`_ for this workaround.