function InputStreamFileWriter::writeStreamToFile

File

core/modules/file/src/Upload/InputStreamFileWriter.php, line 25

Class

InputStreamFileWriter

Writes files from a input stream to a temporary file.

Namespace

Code

public function writeStreamToFile(string $stream = self::DEFAULT_STREAM, int $bytesToRead = self::DEFAULT_BYTES_TO_READ) : string {
    // 'rb' is needed so reading works correctly on Windows environments too.
    $fileData = fopen($stream, 'rb');
    $tempFilePath = $this->fileSystem
        ->tempnam('temporary://', 'file');
    $tempFile = fopen($tempFilePath, 'wb');
    if ($tempFile) {
        while (!feof($fileData)) {
            $read = fread($fileData, $bytesToRead);
            if ($read === FALSE) {
                // Close the file streams.
                fclose($tempFile);
                fclose($fileData);
                throw new UploadException('Input file data could not be read');
            }
            if (fwrite($tempFile, $read) === FALSE) {
                // Close the file streams.
                fclose($tempFile);
                fclose($fileData);
                throw new CannotWriteFileException(sprintf('Temporary file data for "%s" could not be written', $tempFilePath));
            }
        }
        // Close the temp file stream.
        fclose($tempFile);
    }
    else {
        // Close the input file stream since we can't proceed with the upload.
        // Don't try to close $tempFile since it's FALSE at this point.
        fclose($fileData);
        throw new NoFileException(sprintf('Temporary file "%s" could not be opened for file upload', $tempFilePath));
    }
    // Close the input stream.
    fclose($fileData);
    return $tempFilePath;
}