Differential D17625 Diff 42394 src/applications/files/engine/PhabricatorFileStorageEngine.php

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src/applications/files/engine/PhabricatorFileStorageEngine.php

Show First 20 Lines • Show All 326 Lines • ▼ Show 20 Lines	/* -( Loading Storage Engines )-------------------------------------------- */

public function getRawFileDataIterator(		public function getRawFileDataIterator(
PhabricatorFile $file,		PhabricatorFile $file,
$begin,		$begin,
$end,		$end,
PhabricatorFileStorageFormat $format) {		PhabricatorFileStorageFormat $format) {

$formatted_data = $this->readFile($file->getStorageHandle());		$formatted_data = $this->readFile($file->getStorageHandle());

		$known_integrity = $file->getIntegrityHash();
		if ($known_integrity !== null) {
		$new_integrity = $this->newIntegrityHash($formatted_data, $format);
		if ($known_integrity !== $new_integrity) {
		throw new PhabricatorFileIntegrityException(
		pht(
		'File data integrity check failed. Dark forces have corrupted '.
		'or tampered with this file. The file data can not be read.'));
		}
		}

$formatted_data = array($formatted_data);		$formatted_data = array($formatted_data);

$data = '';		$data = '';
$format_iterator = $format->newReadIterator($formatted_data);		$format_iterator = $format->newReadIterator($formatted_data);
foreach ($format_iterator as $raw_chunk) {		foreach ($format_iterator as $raw_chunk) {
$data .= $raw_chunk;		$data .= $raw_chunk;
}		}

if ($begin !== null && $end !== null) {		if ($begin !== null && $end !== null) {
$data = substr($data, $begin, ($end - $begin));		$data = substr($data, $begin, ($end - $begin));
} else if ($begin !== null) {		} else if ($begin !== null) {
$data = substr($data, $begin);		$data = substr($data, $begin);
} else if ($end !== null) {		} else if ($end !== null) {
$data = substr($data, 0, $end);		$data = substr($data, 0, $end);
}		}

return array($data);		return array($data);
}		}

		public function newIntegrityHash(
		$data,
		PhabricatorFileStorageFormat $format) {

		$data_hash = PhabricatorHash::digest($data);
		$format_hash = $format->newFormatIntegrityHash();

		$full_hash = "{$data_hash}/{$format_hash}";

		return PhabricatorHash::digest($full_hash);
		}

}		}