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<?php |
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namespace WebStream\IO; |
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use WebStream\Exception\Extend\InvalidArgumentException; |
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use WebStream\Exception\Extend\IOException; |
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/** |
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* FileOutputStream |
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* @author Ryuichi TANAKA. |
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* @since 2016/02/24 |
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* @version 0.7 |
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*/ |
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class FileOutputStream extends OutputStream |
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{ |
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/** |
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* @var File ファイルオブジェクト |
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*/ |
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protected File $file; |
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/** |
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* constructor |
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* @param mixed $file ファイルオブジェクトまたはファイルパス |
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* @param bool $isAppend 追記フラグ |
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* @throws InvalidArgumentException |
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* @throws IOException |
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*/ |
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public function __construct($file, bool $isAppend = false) |
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{ |
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$filepath = null; |
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if ($file instanceof File) { |
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$this->file = $file; |
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$filepath = $this->file->getFilePath(); |
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} elseif (is_string($file)) { |
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if (!file_exists($file)) { |
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$dirname = dirname($file); |
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$dir = new File($dirname); |
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if (!$dir->isWritable()) { |
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throw new IOException("Cannot writable: " . $dirname); |
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} |
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} |
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$this->file = new File($file); |
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$filepath = $this->file->getFilePath(); |
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} else { |
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throw new InvalidArgumentException("Invalid argument type: " . $file); |
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} |
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$mode = $isAppend ? 'ab' : 'wb'; |
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$stream = fopen($filepath, $mode); |
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if (!is_resource($stream) || $stream === false) { |
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throw new IOException("Unable open " . $this->file->getFilePath()); |
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} |
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if (!flock($stream, LOCK_EX | LOCK_NB)) { |
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throw new IOException("Cannot lock file: " . $this->file->getFilePath()); |
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} |
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parent::__construct($stream); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function write($buf, int $off = null, int $len = null) |
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{ |
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$data = null; |
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if ($off === null && $len === null) { |
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$data = $buf; |
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} elseif ($off !== null && $len === null) { |
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$data = substr($buf, $off); |
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} elseif ($off === null && $len !== null) { |
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$data = substr($buf, 0, $len); |
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} else { |
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$data = substr($buf, $off, $len); |
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} |
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if (@fwrite($this->stream, $data) === false) { |
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throw new IOException("Failed to write stream."); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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* @throws IOException |
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*/ |
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public function close() |
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{ |
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if ($this->stream === null) { |
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return; |
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} |
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$this->flush(); |
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// PHP5.3.2以降はfcloseではロック解放されなくなり、明示的に開放する必要がある |
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flock($this->stream, LOCK_UN); |
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if (get_resource_type($this->stream) !== 'Unknown' && fclose($this->stream) === false) { |
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throw new IOException("Cannot close output stream."); |
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} |
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$this->stream = null; |
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} |
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/** |
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* {@inheritdoc} |
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* @throws IOException |
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*/ |
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public function flush() |
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{ |
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if (@fflush($this->stream) === false) { |
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1 |
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throw new IOException("Failed to flush."); |
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} |
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} |
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} |
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webstream-framework /
IO
