function MTimeProtectedFastFileStorage::save

Overrides FileStorage::save

File

core/lib/Drupal/Component/PhpStorage/MTimeProtectedFastFileStorage.php, line 65

Class

MTimeProtectedFastFileStorage

Stores PHP code in files with securely hashed names.

Namespace

Code

public function save($name, $data) {
    $this->ensureDirectory($this->directory);
    // Write the file out to a temporary location. Prepend with a '.' to keep it
    // hidden from listings and web servers.
    $temporary_path = $this->tempnam($this->directory, '.');
    if (!$temporary_path || !@file_put_contents($temporary_path, $data)) {
        return FALSE;
    }
    // The file will not be chmod() in the future so this is the final
    // permission.
    chmod($temporary_path, 0444);
    // Determine the exact modification time of the file.
    $mtime = $this->getUncachedMTime($temporary_path);
    // Move the temporary file into the proper directory. Note that POSIX
    // compliant systems as well as modern Windows perform the rename operation
    // atomically, i.e. there is no point at which another process attempting to
    // access the new path will find it missing.
    $directory = $this->getContainingDirectoryFullPath($name);
    $this->ensureDirectory($directory);
    $full_path = $this->getFullPath($name, $directory, $mtime);
    $result = rename($temporary_path, $full_path);
    // Finally reset the modification time of the directory to match the one of
    // the newly created file. In order to prevent the creation of a file if the
    // directory does not exist, ensure that the path terminates with a
    // directory separator.
    //
    // Recall that when subsequently loading the file, the hash is calculated
    // based on the file name, the containing mtime, and a the secret string.
    // Hence updating the mtime here is comparable to pointing a symbolic link
    // at a new target, i.e., the newly created file.
    if ($result) {
        $result &= touch($directory . '/', $mtime);
    }
    return (bool) $result;
}