file.class.php

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     * @uses    $GLOBALS['cfg']['UploadDir']
     * @param   string  $name
     * @return  boolean success
     */
    function setLocalSelectedFile($name)
    {
        if (empty($GLOBALS['cfg']['UploadDir'])) return false;

        $this->setName(PMA_userDir($GLOBALS['cfg']['UploadDir']) . PMA_securePath($name));
        if (! $this->isReadable()) {
            $this->_error_message = $GLOBALS['strFileCouldNotBeRead'];
            $this->setName(null);
            return false;
        }

        return true;
    }

    /**
     * @access  public
     * @uses    PMA_File::getName()
     * @uses    is_readable()
     * @uses    ob_start()
     * @uses    ob_end_clean()
     * @return  boolean whether the file is readable or not
     */
    function isReadable()
    {
        // suppress warnings from being displayed, but not from being logged
        // any file access outside of open_basedir will issue a warning
        ob_start();
        $is_readable = is_readable($this->getName());
        ob_end_clean();
        return $is_readable;
    }

    /**
     * If we are on a server with open_basedir, we must move the file
     * before opening it. The FAQ 1.11 explains how to create the "./tmp"
     * directory - if needed
     *
     * @todo replace error message with localized string
     * @todo move check of $cfg['TempDir'] into PMA_Config?
     * @access  public
     * @uses    $cfg['TempDir']
     * @uses    $GLOBALS['strFieldInsertFromFileTempDirNotExists']
     * @uses    PMA_File::isReadable()
     * @uses    PMA_File::getName()
     * @uses    PMA_File::setName()
     * @uses    PMA_File::isTemp()
     * @uses    PMA_File::$_error_message
     * @uses    is_dir()
     * @uses    mkdir()
     * @uses    chmod()
     * @uses    is_writable()
     * @uses    basename()
     * @uses    move_uploaded_file()
     * @uses    ob_start()
     * @uses    ob_end_clean()
     * @return  boolean whether uploaded fiel is fine or not
     */
    function checkUploadedFile()
    {
        if ($this->isReadable()) {
            return true;
        }

        if (empty($GLOBALS['cfg']['TempDir']) || ! is_writable($GLOBALS['cfg']['TempDir'])) {
            // cannot create directory or access, point user to FAQ 1.11
            $this->_error_message = $GLOBALS['strFieldInsertFromFileTempDirNotExists'];
            return false;
        }

        $new_file_to_upload = tempnam(realpath($GLOBALS['cfg']['TempDir']), basename($this->getName()));

        // suppress warnings from being displayed, but not from being logged
        // any file access outside of open_basedir will issue a warning
        ob_start();
        $move_uploaded_file_result = move_uploaded_file($this->getName(), $new_file_to_upload);
        ob_end_clean();
        if (! $move_uploaded_file_result) {
            $this->_error_message = 'error while moving uploaded file';
            return false;
        }

        $this->setName($new_file_to_upload);
        $this->isTemp(true);

        if (! $this->isReadable()) {
            $this->_error_message = 'cannot read (moved) upload file';
            return false;
        }

        return true;
    }

    /**
     * Detects what compression filse uses
     *
     * @todo    move file read part into readChunk() or getChunk()
     * @todo    add support for compression plugins
     * @uses    $GLOBALS['strFileCouldNotBeRead']
     * @uses    PMA_File::$_compression to set it
     * @uses    PMA_File::getName()
     * @uses    fopen()
     * @uses    fread()
     * @uses    strlen()
     * @uses    fclose()
     * @uses    chr()
     * @uses    substr()
     * @access  protected
     * @return  string MIME type of compression, none for none
     */
    function _detectCompression()
    {
        // suppress warnings from being displayed, but not from being logged
        // f.e. any file access outside of open_basedir will issue a warning
        ob_start();
        $file = fopen($this->getName(), 'rb');
        ob_end_clean();

        if (! $file) {
            $this->_error_message = $GLOBALS['strFileCouldNotBeRead'];
            return false;
        }

        /**
         * @todo
         * get registered plugins for file compression

        foreach (PMA_getPlugins($type = 'compression') as $plugin) {
            if (call_user_func_array(array($plugin['classname'], 'canHandle'), array($this->getName()))) {
                $this->setCompressionPlugin($plugin);
                break;
            }
        }
         */

        $test = fread($file, 4);
        $len = strlen($test);
        fclose($file);

        if ($len >= 2 && $test[0] == chr(31) && $test[1] == chr(139)) {
            $this->_compression = 'application/gzip';
        } elseif ($len >= 3 && substr($test, 0, 3) == 'BZh') {
            $this->_compression = 'application/bzip2';
        } elseif ($len >= 4 && $test == "PK\003\004") {
            $this->_compression = 'application/zip';
        } else {
            $this->_compression = 'none';
        }

        return $this->_compression;
    }

    /**
     * whether the content should be decompressed before returned
     */
    function setDecompressContent($decompress)
    {
        $this->_decompress = (bool) $decompress;
    }

    function getHandle()
    {
        if (null === $this->_handle) {
            $this->open();
        }
        return $this->_handle;
    }

    function setHandle($handle)
    {
        $this->_handle = $handle;
    }

    /**
     *
     */
    function open()
    {
        if (! $this->_decompress) {
            $this->_handle = @fopen($this->getName(), 'r');
        }

        switch ($this->getCompression()) {
            case false:
                return false;
            case 'application/bzip2':
                if ($GLOBALS['cfg']['BZipDump'] && @function_exists('bzopen')) {
                    $this->_handle = @bzopen($this->getName(), 'r');
                } else {
                    $this->_error_message = sprintf($GLOBALS['strUnsupportedCompressionDetected'], $this->getCompression());
                    return false;
                }
                break;
            case 'application/gzip':
                if ($GLOBALS['cfg']['GZipDump'] && @function_exists('gzopen')) {
                    $this->_handle = @gzopen($this->getName(), 'r');
                } else {
                    $this->_error_message = sprintf($GLOBALS['strUnsupportedCompressionDetected'], $this->getCompression());
                    return false;
                }
                break;
            case 'application/zip':
                if ($GLOBALS['cfg']['ZipDump'] && @function_exists('zip_open')) {
                    include_once './libraries/zip_extension.lib.php';
                    $result = PMA_getZipContents($this->getName());
                    if (! empty($result['error'])) {
                        $this->_error_message = PMA_Message::rawError($result['error']);
                        return false;
                    } else {
                        $this->content_uncompressed = $result['data'];
                    }
                    unset($result);
                } else {
                    $this->_error_message = sprintf($GLOBALS['strUnsupportedCompressionDetected'], $this->getCompression());
                    return false;
                }
                break;
            case 'none':
                $this->_handle = @fopen($this->getName(), 'r');
                break;
            default:
                $this->_error_message = sprintf($GLOBALS['strUnsupportedCompressionDetected'], $this->getCompression());
                return false;
                break;
        }


    }

    function getCharset()
    {
        return $this->_charset;
    }

    function setCharset($charset)
    {
        $this->_charset = $charset;
    }

    /**
     * @uses    PMA_File::$_compression as return value
     * @uses    PMA_File::detectCompression()
     * @return  string MIME type of compression, none for none
     * @access  public
     */
    function getCompression()
    {
        if (null === $this->_compression) {
            return $this->_detectCompression();
        }

        return $this->_compression;
    }

    /**
     * advances the file pointer in the file handle by $length bytes/chars
     *
     * @param   integer $length numbers of chars/bytes to skip
     * @return  boolean
     * @todo this function is unused
     */
    function advanceFilePointer($length)
    {
        while ($length > 0) {
            // Disable read progresivity, otherwise we eat all memory!
            $read_multiply = 1; // required?
            $this->getNextChunk($length);
            $length -= $this->getChunkSize();
        }
    }

    /**
     * http://bugs.php.net/bug.php?id=29532
     * bzip reads a maximum of 8192 bytes on windows systems
     * @todo this function is unused
     */
    function getNextChunk($max_size = null)
    {
        if (null !== $max_size) {
            $size = min($max_size, $this->getChunkSize());
        } else {
            $size = $this->getChunkSize();
        }

        // $result = $this->handler->getNextChunk($size);
        $result = '';
        switch ($this->getCompression()) {
            case 'application/bzip2':
                $result = '';
                while (strlen($result) < $size - 8192 && ! feof($this->getHandle())) {
                    $result .= bzread($this->getHandle(), $size);
                }
                break;
            case 'application/gzip':
                $result = gzread($this->getHandle(), $size);
                break;
            case 'application/zip':
                /*
                 * if getNextChunk() is used some day,
                 * replace this code by code similar to the one
                 * in open()
                 *
                include_once './libraries/unzip.lib.php';
                $import_handle = new SimpleUnzip();
                $import_handle->ReadFile($this->getName());
                if ($import_handle->Count() == 0) {
                    $this->_error_message = $GLOBALS['strNoFilesFoundInZip'];
                    return false;
                } elseif ($import_handle->GetError(0) != 0) {
                    $this->_error_message = $GLOBALS['strErrorInZipFile']
                        . ' ' . $import_handle->GetErrorMsg(0);
                    return false;
                } else {
                    $result = $import_handle->GetData(0);
                }
                 */
                break;
            case 'none':
                $result = fread($this->getHandle(), $size);
                break;
            default:
                return false;
        }

        echo $size . ' - ';
        echo strlen($result) . ' - ';
        echo (@$GLOBALS['__len__'] += strlen($result)) . ' - ';
        echo $this->_error_message;
        echo '<hr />';

        if ($GLOBALS['charset_conversion']) {
            $result = PMA_convert_string($this->getCharset(), $GLOBALS['charset'], $result);
        } else {
            /**
             * Skip possible byte order marks (I do not think we need more
             * charsets, but feel free to add more, you can use wikipedia for
             * reference: <http://en.wikipedia.org/wiki/Byte_Order_Mark>)
             *
             * @todo BOM could be used for charset autodetection
             */
            if ($this->getOffset() === 0) {
                // UTF-8
                if (strncmp($result, "\xEF\xBB\xBF", 3) == 0) {
                    $result = substr($result, 3);
                // UTF-16 BE, LE
                } elseif (strncmp($result, "\xFE\xFF", 2) == 0
                 || strncmp($result, "\xFF\xFE", 2) == 0) {
                    $result = substr($result, 2);
                }
            }
        }

        $this->_offset += $size;
        if (0 === $result) {
            return true;
        }
        return $result;
    }

    function getOffset()
    {
        return $this->_offset;
    }

    function getChunkSize()
    {
        return $this->_chunk_size;
    }

    function setChunkSize($chunk_size)
    {
        $this->_chunk_size = (int) $chunk_size;
    }

    function getContentLength()
    {
        return strlen($this->_content);
    }

    function eof()
    {
        if ($this->getHandle()) {
            return feof($this->getHandle());
        } else {
            return ($this->getOffset() >= $this->getContentLength());
        }

    }

    /**
     * sets reference to most recent BLOB repository reference
     *
     * @access  static public
     * @param   string - BLOB repository reference
    */
    static function setRecentBLOBReference($ref)
    {
        PMA_File::$_recent_bs_reference = $ref;
    }

    /**
     * retrieves reference to most recent BLOB repository reference
     *
     * @access  static public
     * @return  string - most recent BLOB repository reference
    */
    static function getRecentBLOBReference()
    {
        $ref = PMA_File::$_recent_bs_reference;
        PMA_File::$_recent_bs_reference = NULL;

        return $ref;
    }
}
?>