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PhabricatorFilesManagementCatWorkflow.php
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Mon, Jun 30, 16:16

PhabricatorFilesManagementCatWorkflow.php
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<?php
final class PhabricatorFilesManagementCatWorkflow
extends PhabricatorFilesManagementWorkflow {
protected function didConstruct() {
$this
->setName('cat')
->setSynopsis(pht('Print the contents of a file.'))
->setArguments(
array(
array(
'name' => 'begin',
'param' => 'bytes',
'help' => pht('Begin printing at a specific offset.'),
),
array(
'name' => 'end',
'param' => 'bytes',
'help' => pht('End printing at a specific offset.'),
),
array(
'name' => 'salvage',
'help' => pht(
'DANGEROUS. Attempt to salvage file content even if the '.
'integrity check fails. If an adversary has tampered with '.
'the file, the content may be unsafe.'),
),
array(
'name' => 'names',
'wildcard' => true,
),
));
}
public function execute(PhutilArgumentParser $args) {
$console = PhutilConsole::getConsole();
$names = $args->getArg('names');
if (count($names) > 1) {
throw new PhutilArgumentUsageException(
pht('Specify exactly one file to print, like "%s".', 'F123'));
} else if (!$names) {
throw new PhutilArgumentUsageException(
pht('Specify a file to print, like "%s".', 'F123'));
}
$file = head($this->loadFilesWithNames($names));
$begin = $args->getArg('begin');
$end = $args->getArg('end');
$file->makeEphemeral();
// If we're running in "salvage" mode, wipe out any integrity hash which
// may be present. This makes us read file data without performing an
// integrity check.
$salvage = $args->getArg('salvage');
if ($salvage) {
$file->setIntegrityHash(null);
}
try {
$iterator = $file->getFileDataIterator($begin, $end);
foreach ($iterator as $data) {
echo $data;
}
} catch (PhabricatorFileIntegrityException $ex) {
throw new PhutilArgumentUsageException(
pht(
'File data integrity check failed. Use "--salvage" to bypass '.
'integrity checks. This flag is dangerous, use it at your own '.
'risk. Underlying error: %s',
$ex->getMessage()));
}
return 0;
}
}

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