From 04d6d5ca99ebfd1cebb8ce06618fb3811fc1a8aa Mon Sep 17 00:00:00 2001 From: Charles Date: Thu, 9 Jan 2020 10:55:03 +0100 Subject: phpmyadmin working --- srcs/phpmyadmin/libraries/classes/Export.php | 1225 ++++++++++++++++++++++++++ 1 file changed, 1225 insertions(+) create mode 100644 srcs/phpmyadmin/libraries/classes/Export.php (limited to 'srcs/phpmyadmin/libraries/classes/Export.php') diff --git a/srcs/phpmyadmin/libraries/classes/Export.php b/srcs/phpmyadmin/libraries/classes/Export.php new file mode 100644 index 0000000..34a16b4 --- /dev/null +++ b/srcs/phpmyadmin/libraries/classes/Export.php @@ -0,0 +1,1225 @@ +dbi = $dbi; + } + + /** + * Sets a session variable upon a possible fatal error during export + * + * @return void + */ + public function shutdown(): void + { + $error = error_get_last(); + if ($error != null && mb_strpos($error['message'], "execution time")) { + //set session variable to check if there was error while exporting + $_SESSION['pma_export_error'] = $error['message']; + } + } + + /** + * Detect ob_gzhandler + * + * @return bool + */ + public function isGzHandlerEnabled(): bool + { + return in_array('ob_gzhandler', ob_list_handlers()); + } + + /** + * Detect whether gzencode is needed; it might not be needed if + * the server is already compressing by itself + * + * @return bool Whether gzencode is needed + */ + public function gzencodeNeeded(): bool + { + /* + * We should gzencode only if the function exists + * but we don't want to compress twice, therefore + * gzencode only if transparent compression is not enabled + * and gz compression was not asked via $cfg['OBGzip'] + * but transparent compression does not apply when saving to server + */ + $chromeAndGreaterThan43 = PMA_USR_BROWSER_AGENT == 'CHROME' + && PMA_USR_BROWSER_VER >= 43; // see bug #4942 + + return function_exists('gzencode') + && ((! ini_get('zlib.output_compression') + && ! $this->isGzHandlerEnabled()) + || $GLOBALS['save_on_server'] + || $chromeAndGreaterThan43); + } + + /** + * Output handler for all exports, if needed buffering, it stores data into + * $dump_buffer, otherwise it prints them out. + * + * @param string $line the insert statement + * + * @return bool Whether output succeeded + */ + public function outputHandler(?string $line): bool + { + global $time_start, $dump_buffer, $dump_buffer_len, $save_filename; + + // Kanji encoding convert feature + if ($GLOBALS['output_kanji_conversion']) { + $line = Encoding::kanjiStrConv( + $line, + $GLOBALS['knjenc'], + isset($GLOBALS['xkana']) ? $GLOBALS['xkana'] : '' + ); + } + + // If we have to buffer data, we will perform everything at once at the end + if ($GLOBALS['buffer_needed']) { + $dump_buffer .= $line; + if ($GLOBALS['onfly_compression']) { + $dump_buffer_len += strlen($line); + + if ($dump_buffer_len > $GLOBALS['memory_limit']) { + if ($GLOBALS['output_charset_conversion']) { + $dump_buffer = Encoding::convertString( + 'utf-8', + $GLOBALS['charset'], + $dump_buffer + ); + } + if ($GLOBALS['compression'] == 'gzip' + && $this->gzencodeNeeded() + ) { + // as a gzipped file + // without the optional parameter level because it bugs + $dump_buffer = gzencode($dump_buffer); + } + if ($GLOBALS['save_on_server']) { + $write_result = @fwrite($GLOBALS['file_handle'], $dump_buffer); + // Here, use strlen rather than mb_strlen to get the length + // in bytes to compare against the number of bytes written. + if ($write_result != strlen($dump_buffer)) { + $GLOBALS['message'] = Message::error( + __('Insufficient space to save the file %s.') + ); + $GLOBALS['message']->addParam($save_filename); + return false; + } + } else { + echo $dump_buffer; + } + $dump_buffer = ''; + $dump_buffer_len = 0; + } + } else { + $time_now = time(); + if ($time_start >= $time_now + 30) { + $time_start = $time_now; + header('X-pmaPing: Pong'); + } // end if + } + } elseif ($GLOBALS['asfile']) { + if ($GLOBALS['output_charset_conversion']) { + $line = Encoding::convertString( + 'utf-8', + $GLOBALS['charset'], + $line + ); + } + if ($GLOBALS['save_on_server'] && mb_strlen($line) > 0) { + if ($GLOBALS['file_handle'] !== null) { + $write_result = @fwrite($GLOBALS['file_handle'], $line); + } else { + $write_result = false; + } + // Here, use strlen rather than mb_strlen to get the length + // in bytes to compare against the number of bytes written. + if (! $write_result + || $write_result != strlen($line) + ) { + $GLOBALS['message'] = Message::error( + __('Insufficient space to save the file %s.') + ); + $GLOBALS['message']->addParam($save_filename); + return false; + } + $time_now = time(); + if ($time_start >= $time_now + 30) { + $time_start = $time_now; + header('X-pmaPing: Pong'); + } // end if + } else { + // We export as file - output normally + echo $line; + } + } else { + // We export as html - replace special chars + echo htmlspecialchars($line); + } + return true; + } + + /** + * Returns HTML containing the footer for a displayed export + * + * @param string $back_button the link for going Back + * @param string $refreshButton the link for refreshing page + * + * @return string the HTML output + */ + public function getHtmlForDisplayedExportFooter( + string $back_button, + string $refreshButton + ): string { + /** + * Close the html tags and add the footers for on-screen export + */ + return '' + . ' ' + . '
' + // bottom back button + . $back_button + . $refreshButton + . '' + . '' . "\n"; + } + + /** + * Computes the memory limit for export + * + * @return int the memory limit + */ + public function getMemoryLimit(): int + { + $memory_limit = trim(ini_get('memory_limit')); + $memory_limit_num = (int) substr($memory_limit, 0, -1); + $lowerLastChar = strtolower(substr($memory_limit, -1)); + // 2 MB as default + if (empty($memory_limit) || '-1' == $memory_limit) { + $memory_limit = 2 * 1024 * 1024; + } elseif ($lowerLastChar == 'm') { + $memory_limit = $memory_limit_num * 1024 * 1024; + } elseif ($lowerLastChar == 'k') { + $memory_limit = $memory_limit_num * 1024; + } elseif ($lowerLastChar == 'g') { + $memory_limit = $memory_limit_num * 1024 * 1024 * 1024; + } else { + $memory_limit = (int) $memory_limit; + } + + // Some of memory is needed for other things and as threshold. + // During export I had allocated (see memory_get_usage function) + // approx 1.2MB so this comes from that. + if ($memory_limit > 1500000) { + $memory_limit -= 1500000; + } + + // Some memory is needed for compression, assume 1/3 + $memory_limit /= 8; + return $memory_limit; + } + + /** + * Return the filename and MIME type for export file + * + * @param string $export_type type of export + * @param string $remember_template whether to remember template + * @param ExportPlugin $export_plugin the export plugin + * @param string $compression compression asked + * @param string $filename_template the filename template + * + * @return string[] the filename template and mime type + */ + public function getFilenameAndMimetype( + string $export_type, + string $remember_template, + ExportPlugin $export_plugin, + string $compression, + string $filename_template + ): array { + if ($export_type == 'server') { + if (! empty($remember_template)) { + $GLOBALS['PMA_Config']->setUserValue( + 'pma_server_filename_template', + 'Export/file_template_server', + $filename_template + ); + } + } elseif ($export_type == 'database') { + if (! empty($remember_template)) { + $GLOBALS['PMA_Config']->setUserValue( + 'pma_db_filename_template', + 'Export/file_template_database', + $filename_template + ); + } + } else { + if (! empty($remember_template)) { + $GLOBALS['PMA_Config']->setUserValue( + 'pma_table_filename_template', + 'Export/file_template_table', + $filename_template + ); + } + } + $filename = Util::expandUserString($filename_template); + // remove dots in filename (coming from either the template or already + // part of the filename) to avoid a remote code execution vulnerability + $filename = Sanitize::sanitizeFilename($filename, $replaceDots = true); + + // Grab basic dump extension and mime type + // Check if the user already added extension; + // get the substring where the extension would be if it was included + $extension_start_pos = mb_strlen($filename) - mb_strlen( + $export_plugin->getProperties()->getExtension() + ) - 1; + $user_extension = mb_substr( + $filename, + $extension_start_pos, + mb_strlen($filename) + ); + $required_extension = "." . $export_plugin->getProperties()->getExtension(); + if (mb_strtolower($user_extension) != $required_extension) { + $filename .= $required_extension; + } + $mime_type = $export_plugin->getProperties()->getMimeType(); + + // If dump is going to be compressed, set correct mime_type and add + // compression to extension + if ($compression == 'gzip') { + $filename .= '.gz'; + $mime_type = 'application/x-gzip'; + } elseif ($compression == 'zip') { + $filename .= '.zip'; + $mime_type = 'application/zip'; + } + return [ + $filename, + $mime_type, + ]; + } + + /** + * Open the export file + * + * @param string $filename the export filename + * @param boolean $quick_export whether it's a quick export or not + * + * @return array the full save filename, possible message and the file handle + */ + public function openFile(string $filename, bool $quick_export): array + { + $file_handle = null; + $message = ''; + $doNotSaveItOver = true; + + if (isset($_POST['quick_export_onserver_overwrite'])) { + $doNotSaveItOver = $_POST['quick_export_onserver_overwrite'] != 'saveitover'; + } + + $save_filename = Util::userDir($GLOBALS['cfg']['SaveDir']) + . preg_replace('@[/\\\\]@', '_', $filename); + + if (@file_exists($save_filename) + && ((! $quick_export && empty($_POST['onserver_overwrite'])) + || ($quick_export + && $doNotSaveItOver)) + ) { + $message = Message::error( + __( + 'File %s already exists on server, ' + . 'change filename or check overwrite option.' + ) + ); + $message->addParam($save_filename); + } elseif (@is_file($save_filename) && ! @is_writable($save_filename)) { + $message = Message::error( + __( + 'The web server does not have permission ' + . 'to save the file %s.' + ) + ); + $message->addParam($save_filename); + } elseif (! $file_handle = @fopen($save_filename, 'w')) { + $message = Message::error( + __( + 'The web server does not have permission ' + . 'to save the file %s.' + ) + ); + $message->addParam($save_filename); + } + return [ + $save_filename, + $message, + $file_handle, + ]; + } + + /** + * Close the export file + * + * @param resource $file_handle the export file handle + * @param string $dump_buffer the current dump buffer + * @param string $save_filename the export filename + * + * @return Message a message object (or empty string) + */ + public function closeFile( + $file_handle, + string $dump_buffer, + string $save_filename + ): Message { + $write_result = @fwrite($file_handle, $dump_buffer); + fclose($file_handle); + // Here, use strlen rather than mb_strlen to get the length + // in bytes to compare against the number of bytes written. + if (strlen($dump_buffer) > 0 + && (! $write_result || $write_result != strlen($dump_buffer)) + ) { + $message = new Message( + __('Insufficient space to save the file %s.'), + Message::ERROR, + [$save_filename] + ); + } else { + $message = new Message( + __('Dump has been saved to file %s.'), + Message::SUCCESS, + [$save_filename] + ); + } + return $message; + } + + /** + * Compress the export buffer + * + * @param array|string $dump_buffer the current dump buffer + * @param string $compression the compression mode + * @param string $filename the filename + * + * @return array|string|bool + */ + public function compress($dump_buffer, string $compression, string $filename) + { + if ($compression == 'zip' && function_exists('gzcompress')) { + $zipExtension = new ZipExtension(); + $filename = substr($filename, 0, -4); // remove extension (.zip) + $dump_buffer = $zipExtension->createFile($dump_buffer, $filename); + } elseif ($compression == 'gzip' && $this->gzencodeNeeded()) { + // without the optional parameter level because it bugs + $dump_buffer = gzencode($dump_buffer); + } + return $dump_buffer; + } + + /** + * Saves the dump_buffer for a particular table in an array + * Used in separate files export + * + * @param string $object_name the name of current object to be stored + * @param boolean $append optional boolean to append to an existing index or not + * + * @return void + */ + public function saveObjectInBuffer(string $object_name, bool $append = false): void + { + global $dump_buffer_objects, $dump_buffer, $dump_buffer_len; + + if (! empty($dump_buffer)) { + if ($append && isset($dump_buffer_objects[$object_name])) { + $dump_buffer_objects[$object_name] .= $dump_buffer; + } else { + $dump_buffer_objects[$object_name] = $dump_buffer; + } + } + + // Re - initialize + $dump_buffer = ''; + $dump_buffer_len = 0; + } + + /** + * Returns HTML containing the header for a displayed export + * + * @param string $export_type the export type + * @param string $db the database name + * @param string $table the table name + * + * @return string[] the generated HTML and back button + */ + public function getHtmlForDisplayedExportHeader( + string $export_type, + string $db, + string $table + ): array { + $html = '
'; + + /** + * Displays a back button with all the $_POST data in the URL + * (store in a variable to also display after the textarea) + */ + $back_button = '

[ ' . __('Back') . ' ]

'; + $html .= '
'; + $html .= $back_button; + $refreshButton = '
'; + $refreshButton .= '[ ' . __('Refresh') . ' ]'; + foreach ($_POST as $name => $value) { + if (is_array($value)) { + foreach ($value as $val) { + $refreshButton .= ''; + } + } else { + $refreshButton .= ''; + } + } + $refreshButton .= '
'; + $html .= $refreshButton + . '
' + . '
' + . '