/phpMyAdmin/libraries/File.class.php
PHP | 827 lines | 442 code | 92 blank | 293 comment | 84 complexity | 149132fce122a04c49efca7d42cf2a5c MD5 | raw file
Possible License(s): LGPL-3.0, LGPL-2.0, JSON, GPL-2.0, BSD-3-Clause, LGPL-2.1, MIT
- <?php
- /* vim: set expandtab sw=4 ts=4 sts=4: */
- /**
- * file upload functions
- *
- * @package PhpMyAdmin
- */
- /**
- *
- * @todo when uploading a file into a blob field, should we also consider using
- * chunks like in import? UPDATE `table` SET `field` = `field` + [chunk]
- * @package PhpMyAdmin
- */
- class PMA_File
- {
- /**
- * @var string the temporary file name
- * @access protected
- */
- var $_name = null;
- /**
- * @var string the content
- * @access protected
- */
- var $_content = null;
- /**
- * @var string the error message
- * @access protected
- */
- var $_error_message = '';
- /**
- * @var bool whether the file is temporary or not
- * @access protected
- */
- var $_is_temp = false;
- /**
- * @var string type of compression
- * @access protected
- */
- var $_compression = null;
- /**
- * @var integer
- */
- var $_offset = 0;
- /**
- * @var integer size of chunk to read with every step
- */
- var $_chunk_size = 32768;
- /**
- * @var resource file handle
- */
- var $_handle = null;
- /**
- * @var boolean whether to decompress content before returning
- */
- var $_decompress = false;
- /**
- * @var string charset of file
- */
- var $_charset = null;
- /**
- * @staticvar string most recent BLOB repository reference
- */
- static $_recent_bs_reference = null;
- /**
- * constructor
- *
- * @access public
- * @param string $name file name
- */
- function __construct($name = false)
- {
- if ($name) {
- $this->setName($name);
- }
- }
- /**
- * destructor
- *
- * @see PMA_File::cleanUp()
- * @access public
- */
- function __destruct()
- {
- $this->cleanUp();
- }
- /**
- * deletes file if it is temporary, usally from a moved upload file
- *
- * @access public
- * @return boolean success
- */
- function cleanUp()
- {
- if ($this->isTemp()) {
- return $this->delete();
- }
- return true;
- }
- /**
- * deletes the file
- *
- * @access public
- * @return boolean success
- */
- function delete()
- {
- return unlink($this->getName());
- }
- /**
- * checks or sets the temp flag for this file
- * file objects with temp flags are deleted with object destruction
- *
- * @access public
- * @param boolean sets the temp flag
- * @return boolean PMA_File::$_is_temp
- */
- function isTemp($is_temp = null)
- {
- if (null !== $is_temp) {
- $this->_is_temp = (bool) $is_temp;
- }
- return $this->_is_temp;
- }
- /**
- * accessor
- *
- * @access public
- * @param string $name file name
- */
- function setName($name)
- {
- $this->_name = trim($name);
- }
- /**
- * @access public
- * @return string binary file content
- */
- function getContent($as_binary = true, $offset = 0, $length = null)
- {
- if (null === $this->_content) {
- if ($this->isUploaded() && ! $this->checkUploadedFile()) {
- return false;
- }
- if (! $this->isReadable()) {
- return false;
- }
- if (function_exists('file_get_contents')) {
- $this->_content = file_get_contents($this->getName());
- } elseif ($size = filesize($this->getName())) {
- $this->_content = fread(fopen($this->getName(), 'rb'), $size);
- }
- }
- if (! empty($this->_content) && $as_binary) {
- return '0x' . bin2hex($this->_content);
- }
- if (null !== $length) {
- return substr($this->_content, $offset, $length);
- } elseif ($offset > 0) {
- return substr($this->_content, $offset);
- }
- return $this->_content;
- }
- /**
- * @access public
- * @return bool
- */
- function isUploaded()
- {
- return is_uploaded_file($this->getName());
- }
- /**
- * accessor
- *
- * @access public
- * @return string PMA_File::$_name
- */
- function getName()
- {
- return $this->_name;
- }
- /**
- * @access public
- * @param string name of file uploaded
- * @return boolean success
- */
- function setUploadedFile($name)
- {
- $this->setName($name);
- if (! $this->isUploaded()) {
- $this->setName(null);
- $this->_error_message = __('File was not an uploaded file.');
- return false;
- }
- return true;
- }
- /**
- * @access public
- * @param string $key the md5 hash of the column name
- * @param string $rownumber
- * @return boolean success
- */
- function setUploadedFromTblChangeRequest($key, $rownumber)
- {
- if (! isset($_FILES['fields_upload']) || empty($_FILES['fields_upload']['name']['multi_edit'][$rownumber][$key])) {
- return false;
- }
- $file = PMA_File::fetchUploadedFromTblChangeRequestMultiple($_FILES['fields_upload'], $rownumber, $key);
- // for blobstreaming
- $is_bs_upload = false;
- // check if this field requires a repository upload
- if (isset($_REQUEST['upload_blob_repo']['multi_edit'][$rownumber][$key])) {
- $is_bs_upload = ($_REQUEST['upload_blob_repo']['multi_edit'][$rownumber][$key] == "on") ? true : false;
- }
- // if request is an upload to the BLOB repository
- if ($is_bs_upload) {
- $bs_db = $_REQUEST['db'];
- $bs_table = $_REQUEST['table'];
- $tmp_filename = $file['tmp_name'];
- $tmp_file_type = $file['type'];
- if (! $tmp_file_type) {
- $tmp_file_type = null;
- }
- if (! $bs_db || ! $bs_table) {
- $this->_error_message = __('Unknown error while uploading.');
- return false;
- }
- $blob_url = PMA_BS_UpLoadFile($bs_db, $bs_table, $tmp_file_type, $tmp_filename);
- PMA_File::setRecentBLOBReference($blob_url);
- } // end if ($is_bs_upload)
- // check for file upload errors
- switch ($file['error']) {
- // we do not use the PHP constants here cause not all constants
- // are defined in all versions of PHP - but the correct constants names
- // are given as comment
- case 0: //UPLOAD_ERR_OK:
- return $this->setUploadedFile($file['tmp_name']);
- break;
- case 4: //UPLOAD_ERR_NO_FILE:
- break;
- case 1: //UPLOAD_ERR_INI_SIZE:
- $this->_error_message = __('The uploaded file exceeds the upload_max_filesize directive in php.ini.');
- break;
- case 2: //UPLOAD_ERR_FORM_SIZE:
- $this->_error_message = __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.');
- break;
- case 3: //UPLOAD_ERR_PARTIAL:
- $this->_error_message = __('The uploaded file was only partially uploaded.');
- break;
- case 6: //UPLOAD_ERR_NO_TMP_DIR:
- $this->_error_message = __('Missing a temporary folder.');
- break;
- case 7: //UPLOAD_ERR_CANT_WRITE:
- $this->_error_message = __('Failed to write file to disk.');
- break;
- case 8: //UPLOAD_ERR_EXTENSION:
- $this->_error_message = __('File upload stopped by extension.');
- break;
- default:
- $this->_error_message = __('Unknown error in file upload.');
- } // end switch
- return false;
- }
- /**
- * strips some dimension from the multi-dimensional array from $_FILES
- *
- * <code>
- * $file['name']['multi_edit'][$rownumber][$key] = [value]
- * $file['type']['multi_edit'][$rownumber][$key] = [value]
- * $file['size']['multi_edit'][$rownumber][$key] = [value]
- * $file['tmp_name']['multi_edit'][$rownumber][$key] = [value]
- * $file['error']['multi_edit'][$rownumber][$key] = [value]
- *
- * // becomes:
- *
- * $file['name'] = [value]
- * $file['type'] = [value]
- * $file['size'] = [value]
- * $file['tmp_name'] = [value]
- * $file['error'] = [value]
- * </code>
- *
- * @access public
- * @static
- * @param array $file the array
- * @param string $rownumber
- * @param string $key
- * @return array
- */
- function fetchUploadedFromTblChangeRequestMultiple($file, $rownumber, $key)
- {
- $new_file = array(
- 'name' => $file['name']['multi_edit'][$rownumber][$key],
- 'type' => $file['type']['multi_edit'][$rownumber][$key],
- 'size' => $file['size']['multi_edit'][$rownumber][$key],
- 'tmp_name' => $file['tmp_name']['multi_edit'][$rownumber][$key],
- 'error' => $file['error']['multi_edit'][$rownumber][$key],
- );
- return $new_file;
- }
- /**
- * sets the name if the file to the one selected in the tbl_change form
- *
- * @access public
- * @param string $key the md5 hash of the column name
- * @param string $rownumber
- * @return boolean success
- */
- function setSelectedFromTblChangeRequest($key, $rownumber = null)
- {
- if (! empty($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key])
- && is_string($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key])) {
- // ... whether with multiple rows ...
- // for blobstreaming
- $is_bs_upload = false;
- // check if this field requires a repository upload
- if (isset($_REQUEST['upload_blob_repo']['multi_edit'][$rownumber][$key])) {
- $is_bs_upload = ($_REQUEST['upload_blob_repo']['multi_edit'][$rownumber][$key] == "on") ? true : false;
- }
- // is a request to upload file to BLOB repository using uploadDir mechanism
- if ($is_bs_upload) {
- $bs_db = $_REQUEST['db'];
- $bs_table = $_REQUEST['table'];
- $tmp_filename = $GLOBALS['cfg']['UploadDir'] . '/' . $_REQUEST['fields_uploadlocal_' . $key]['multi_edit'][$rownumber];
- // check if fileinfo library exists
- if ($PMA_Config->get('FILEINFO_EXISTS')) {
- // attempt to init fileinfo
- $finfo = finfo_open(FILEINFO_MIME);
- // fileinfo exists
- if ($finfo) {
- // pass in filename to fileinfo and close fileinfo handle after
- $tmp_file_type = finfo_file($finfo, $tmp_filename);
- finfo_close($finfo);
- }
- } else {
- // no fileinfo library exists, use file command
- $tmp_file_type = exec("file -bi " . escapeshellarg($tmp_filename));
- }
- if (! $tmp_file_type) {
- $tmp_file_type = null;
- }
- if (! $bs_db || !$bs_table) {
- $this->_error_message = __('Unknown error while uploading.');
- return false;
- }
- $blob_url = PMA_BS_UpLoadFile($bs_db, $bs_table, $tmp_file_type, $tmp_filename);
- PMA_File::setRecentBLOBReference($blob_url);
- } // end if ($is_bs_upload)
- return $this->setLocalSelectedFile($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key]);
- } else {
- return false;
- }
- }
- /**
- * @access public
- * @return string error message
- */
- function getError()
- {
- return $this->_error_message;
- }
- /**
- * @access public
- * @return boolean whether an error occured or not
- */
- function isError()
- {
- return ! empty($this->_error_message);
- }
- /**
- * checks the superglobals provided if the tbl_change form is submitted
- * and uses the submitted/selected file
- *
- * @access public
- * @param string $key the md5 hash of the column name
- * @param string $rownumber
- * @return boolean success
- */
- function checkTblChangeForm($key, $rownumber)
- {
- if ($this->setUploadedFromTblChangeRequest($key, $rownumber)) {
- // well done ...
- $this->_error_message = '';
- return true;
- } elseif ($this->setSelectedFromTblChangeRequest($key, $rownumber)) {
- // well done ...
- $this->_error_message = '';
- return true;
- }
- // all failed, whether just no file uploaded/selected or an error
- return false;
- }
- /**
- *
- * @access public
- * @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 = __('File could not be read');
- $this->setName(null);
- return false;
- }
- return true;
- }
- /**
- * @access public
- * @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 move check of $cfg['TempDir'] into PMA_Config?
- * @access public
- * @return boolean whether uploaded fiel is fine or not
- */
- function checkUploadedFile()
- {
- if ($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 = __('Error moving the uploaded file, see [a@./Documentation.html#faq1_11@Documentation]FAQ 1.11[/a]');
- 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
- * @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) {
- $this->_error_message = __('File could not be read');
- return false;
- }
- /**
- * @todo
- * get registered plugins for file compression
- foreach (PMA_getPlugins($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;
- }
- /**
- * @return bool
- */
- 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(__('You attempted to load file with unsupported compression (%s). Either support for it is not implemented or disabled by your configuration.'), $this->getCompression());
- return false;
- }
- break;
- case 'application/gzip':
- if ($GLOBALS['cfg']['GZipDump'] && @function_exists('gzopen')) {
- $this->_handle = @gzopen($this->getName(), 'r');
- } else {
- $this->_error_message = sprintf(__('You attempted to load file with unsupported compression (%s). Either support for it is not implemented or disabled by your configuration.'), $this->getCompression());
- return false;
- }
- break;
- case 'application/zip':
- if ($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(__('You attempted to load file with unsupported compression (%s). Either support for it is not implemented or disabled by your configuration.'), $this->getCompression());
- return false;
- }
- break;
- case 'none':
- $this->_handle = @fopen($this->getName(), 'r');
- break;
- default:
- $this->_error_message = sprintf(__('You attempted to load file with unsupported compression (%s). Either support for it is not implemented or disabled by your configuration.'), $this->getCompression());
- return false;
- break;
- }
- return true;
- }
- function getCharset()
- {
- return $this->_charset;
- }
- function setCharset($charset)
- {
- $this->_charset = $charset;
- }
- /**
- * @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) {
- $this->getNextChunk($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
- * @param int $max_size
- * @return bool|string
- */
- function getNextChunk($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) {
- $this->_error_message = __('No files found inside ZIP archive!');
- return false;
- } elseif ($import_handle->GetError(0) != 0) {
- $this->_error_message = __('Error in ZIP archive:')
- . ' ' . $import_handle->GetErrorMsg(0);
- return false;
- } else {
- $result = $import_handle->GetData(0);
- }
- */
- break;
- case 'none':
- $result = fread($this->getHandle(), $size);
- break;
- default:
- return false;
- }
- if ($GLOBALS['charset_conversion']) {
- $result = PMA_convert_string($this->getCharset(), 'utf-8', $result);
- } else {
- /**
- * Skip possible byte order marks (I do not think we need more
- * charsets, but feel free to add more, you can use wikipedia for
- * reference: <http://en.wikipedia.org/wiki/Byte_Order_Mark>)
- *
- * @todo BOM could be used for charset autodetection
- */
- if ($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() >= $this->getContentLength());
- }
- }
- /**
- * sets reference to most recent BLOB repository reference
- *
- * @access public
- * @param string - BLOB repository reference
- */
- static function setRecentBLOBReference($ref)
- {
- PMA_File::$_recent_bs_reference = $ref;
- }
- /**
- * retrieves reference to most recent BLOB repository reference
- *
- * @access 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;
- }
- }
- ?>