mirror of
https://github.com/YunoHost-Apps/phpmyadmin_ynh.git
synced 2024-09-03 19:56:46 +02:00
865 lines
23 KiB
PHP
865 lines
23 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* file upload functions
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*
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* @package PhpMyAdmin
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/**
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* File wrapper class
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*
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* @todo when uploading a file into a blob field, should we also consider using
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* chunks like in import? UPDATE `table` SET `field` = `field` + [chunk]
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*
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* @package PhpMyAdmin
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*/
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class PMA_File
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{
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/**
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* @var string the temporary file name
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* @access protected
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*/
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var $_name = null;
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/**
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* @var string the content
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* @access protected
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*/
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var $_content = null;
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/**
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* @var string the error message
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* @access protected
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*/
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var $_error_message = '';
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/**
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* @var bool whether the file is temporary or not
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* @access protected
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*/
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var $_is_temp = false;
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/**
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* @var string type of compression
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* @access protected
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*/
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var $_compression = null;
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/**
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* @var integer
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*/
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var $_offset = 0;
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/**
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* @var integer size of chunk to read with every step
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*/
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var $_chunk_size = 32768;
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/**
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* @var resource file handle
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*/
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var $_handle = null;
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/**
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* @var boolean whether to decompress content before returning
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*/
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var $_decompress = false;
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/**
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* @var string charset of file
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*/
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var $_charset = null;
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/**
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* constructor
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*
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* @param boolean|string $name file name or false
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*
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* @access public
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*/
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public function __construct($name = false)
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{
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if ($name) {
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$this->setName($name);
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}
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}
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/**
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* destructor
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*
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* @see PMA_File::cleanUp()
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* @access public
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*/
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public function __destruct()
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{
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$this->cleanUp();
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}
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/**
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* deletes file if it is temporary, usually from a moved upload file
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*
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* @access public
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* @return boolean success
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*/
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public function cleanUp()
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{
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if ($this->isTemp()) {
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return $this->delete();
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}
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return true;
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}
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/**
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* deletes the file
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*
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* @access public
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* @return boolean success
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*/
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public function delete()
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{
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return unlink($this->getName());
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}
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/**
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* checks or sets the temp flag for this file
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* file objects with temp flags are deleted with object destruction
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*
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* @param boolean $is_temp sets the temp flag
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*
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* @return boolean PMA_File::$_is_temp
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* @access public
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*/
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public function isTemp($is_temp = null)
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{
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if (null !== $is_temp) {
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$this->_is_temp = (bool) $is_temp;
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}
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return $this->_is_temp;
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}
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/**
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* accessor
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*
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* @param string $name file name
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*
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* @return void
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* @access public
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*/
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public function setName($name)
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{
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$this->_name = trim($name);
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}
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/**
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* Gets file content
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*
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* @param boolean $as_binary whether to return content as binary
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* @param integer $offset starting offset
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* @param integer $length length
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*
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* @return mixed the binary file content as a string,
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* or false if no content
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*
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* @access public
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*/
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public function getContent($as_binary = true, $offset = 0, $length = null)
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{
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if (null === $this->_content) {
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if ($this->isUploaded() && ! $this->checkUploadedFile()) {
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return false;
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}
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if (! $this->isReadable()) {
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return false;
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}
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if (function_exists('file_get_contents')) {
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$this->_content = file_get_contents($this->getName());
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} elseif ($size = filesize($this->getName())) {
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$this->_content = fread(fopen($this->getName(), 'rb'), $size);
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}
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}
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if (! empty($this->_content) && $as_binary) {
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return '0x' . bin2hex($this->_content);
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}
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if (null !== $length) {
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return substr($this->_content, $offset, $length);
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} elseif ($offset > 0) {
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return substr($this->_content, $offset);
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}
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return $this->_content;
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}
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/**
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* Whether file is uploaded.
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*
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* @access public
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*
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* @return bool
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*/
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public function isUploaded()
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{
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return is_uploaded_file($this->getName());
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}
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/**
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* accessor
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*
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* @access public
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* @return string PMA_File::$_name
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*/
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public function getName()
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{
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return $this->_name;
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}
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/**
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* Initializes object from uploaded file.
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*
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* @param string $name name of file uploaded
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*
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* @return boolean success
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* @access public
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*/
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public function setUploadedFile($name)
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{
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$this->setName($name);
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if (! $this->isUploaded()) {
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$this->setName(null);
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$this->_error_message = __('File was not an uploaded file.');
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return false;
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}
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return true;
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}
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/**
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* Loads uploaded file from table change request.
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*
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* @param string $key the md5 hash of the column name
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* @param string $rownumber number of row to process
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*
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* @return boolean success
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* @access public
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*/
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public function setUploadedFromTblChangeRequest($key, $rownumber)
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{
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if (! isset($_FILES['fields_upload'])
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|| empty($_FILES['fields_upload']['name']['multi_edit'][$rownumber][$key])
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) {
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return false;
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}
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$file = PMA_File::fetchUploadedFromTblChangeRequestMultiple(
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$_FILES['fields_upload'],
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$rownumber,
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$key
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);
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// check for file upload errors
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switch ($file['error']) {
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// we do not use the PHP constants here cause not all constants
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// are defined in all versions of PHP - but the correct constants names
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// are given as comment
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case 0: //UPLOAD_ERR_OK:
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return $this->setUploadedFile($file['tmp_name']);
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break;
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case 4: //UPLOAD_ERR_NO_FILE:
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break;
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case 1: //UPLOAD_ERR_INI_SIZE:
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$this->_error_message = __('The uploaded file exceeds the upload_max_filesize directive in php.ini.');
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break;
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case 2: //UPLOAD_ERR_FORM_SIZE:
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$this->_error_message = __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.');
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break;
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case 3: //UPLOAD_ERR_PARTIAL:
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$this->_error_message = __('The uploaded file was only partially uploaded.');
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break;
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case 6: //UPLOAD_ERR_NO_TMP_DIR:
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$this->_error_message = __('Missing a temporary folder.');
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break;
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case 7: //UPLOAD_ERR_CANT_WRITE:
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$this->_error_message = __('Failed to write file to disk.');
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break;
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case 8: //UPLOAD_ERR_EXTENSION:
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$this->_error_message = __('File upload stopped by extension.');
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break;
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default:
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$this->_error_message = __('Unknown error in file upload.');
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} // end switch
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return false;
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}
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/**
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* strips some dimension from the multi-dimensional array from $_FILES
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*
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* <code>
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* $file['name']['multi_edit'][$rownumber][$key] = [value]
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* $file['type']['multi_edit'][$rownumber][$key] = [value]
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* $file['size']['multi_edit'][$rownumber][$key] = [value]
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* $file['tmp_name']['multi_edit'][$rownumber][$key] = [value]
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* $file['error']['multi_edit'][$rownumber][$key] = [value]
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*
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* // becomes:
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*
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* $file['name'] = [value]
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* $file['type'] = [value]
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* $file['size'] = [value]
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* $file['tmp_name'] = [value]
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* $file['error'] = [value]
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* </code>
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*
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* @param array $file the array
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* @param string $rownumber number of row to process
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* @param string $key key to process
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*
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* @return array
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* @access public
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* @static
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*/
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public function fetchUploadedFromTblChangeRequestMultiple(
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$file, $rownumber, $key
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) {
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$new_file = array(
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'name' => $file['name']['multi_edit'][$rownumber][$key],
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'type' => $file['type']['multi_edit'][$rownumber][$key],
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'size' => $file['size']['multi_edit'][$rownumber][$key],
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'tmp_name' => $file['tmp_name']['multi_edit'][$rownumber][$key],
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'error' => $file['error']['multi_edit'][$rownumber][$key],
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);
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return $new_file;
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}
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/**
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* sets the name if the file to the one selected in the tbl_change form
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*
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* @param string $key the md5 hash of the column name
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* @param string $rownumber number of row to process
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*
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* @return boolean success
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* @access public
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*/
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public function setSelectedFromTblChangeRequest($key, $rownumber = null)
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{
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if (! empty($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key])
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&& is_string($_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key])
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) {
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// ... whether with multiple rows ...
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return $this->setLocalSelectedFile(
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$_REQUEST['fields_uploadlocal']['multi_edit'][$rownumber][$key]
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);
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} else {
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return false;
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}
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}
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/**
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* Returns possible error message.
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*
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* @access public
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* @return string error message
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*/
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public function getError()
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{
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return $this->_error_message;
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}
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/**
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* Checks whether there was any error.
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*
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* @access public
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* @return boolean whether an error occurred or not
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*/
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public function isError()
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{
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return ! empty($this->_error_message);
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}
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/**
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* checks the superglobals provided if the tbl_change form is submitted
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* and uses the submitted/selected file
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*
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* @param string $key the md5 hash of the column name
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* @param string $rownumber number of row to process
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*
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* @return boolean success
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* @access public
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*/
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public function checkTblChangeForm($key, $rownumber)
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{
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if ($this->setUploadedFromTblChangeRequest($key, $rownumber)) {
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// well done ...
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$this->_error_message = '';
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return true;
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} elseif ($this->setSelectedFromTblChangeRequest($key, $rownumber)) {
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// well done ...
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$this->_error_message = '';
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return true;
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}
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// all failed, whether just no file uploaded/selected or an error
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return false;
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}
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/**
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* Sets named file to be read from UploadDir.
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*
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* @param string $name file name
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*
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* @return boolean success
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* @access public
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*/
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public function setLocalSelectedFile($name)
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{
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if (empty($GLOBALS['cfg']['UploadDir'])) {
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return false;
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}
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$this->setName(
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PMA_Util::userDir($GLOBALS['cfg']['UploadDir']) . PMA_securePath($name)
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);
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if (! $this->isReadable()) {
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$this->_error_message = __('File could not be read');
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$this->setName(null);
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return false;
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}
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return true;
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}
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/**
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* Checks whether file can be read.
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*
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* @access public
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* @return boolean whether the file is readable or not
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*/
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public function isReadable()
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{
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// suppress warnings from being displayed, but not from being logged
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// any file access outside of open_basedir will issue a warning
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ob_start();
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$is_readable = is_readable($this->getName());
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ob_end_clean();
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return $is_readable;
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}
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/**
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* If we are on a server with open_basedir, we must move the file
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* before opening it. The FAQ 1.11 explains how to create the "./tmp"
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* directory - if needed
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*
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* @todo move check of $cfg['TempDir'] into PMA_Config?
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* @access public
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* @return boolean whether uploaded fiel is fine or not
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*/
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public function checkUploadedFile()
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{
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if ($this->isReadable()) {
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return true;
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}
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if (empty($GLOBALS['cfg']['TempDir'])
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|| ! is_writable($GLOBALS['cfg']['TempDir'])
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) {
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// cannot create directory or access, point user to FAQ 1.11
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$this->_error_message = __('Error moving the uploaded file, see [doc@faq1-11]FAQ 1.11[/doc]');
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return false;
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}
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$new_file_to_upload = tempnam(
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realpath($GLOBALS['cfg']['TempDir']),
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basename($this->getName())
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);
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// suppress warnings from being displayed, but not from being logged
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// any file access outside of open_basedir will issue a warning
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ob_start();
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$move_uploaded_file_result = move_uploaded_file(
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$this->getName(),
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$new_file_to_upload
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);
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ob_end_clean();
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if (! $move_uploaded_file_result) {
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$this->_error_message = __('Error while moving uploaded file.');
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return false;
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}
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$this->setName($new_file_to_upload);
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$this->isTemp(true);
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if (! $this->isReadable()) {
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$this->_error_message = __('Cannot read (moved) upload file.');
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return false;
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}
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return true;
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}
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|
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/**
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* Detects what compression filse uses
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*
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* @todo move file read part into readChunk() or getChunk()
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* @todo add support for compression plugins
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* @access protected
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* @return string MIME type of compression, none for none
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*/
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protected function detectCompression()
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{
|
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// suppress warnings from being displayed, but not from being logged
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// f.e. any file access outside of open_basedir will issue a warning
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ob_start();
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$file = fopen($this->getName(), 'rb');
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ob_end_clean();
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if (! $file) {
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$this->_error_message = __('File could not be read');
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return false;
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}
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|
|
|
/**
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* @todo
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* get registered plugins for file compression
|
|
|
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foreach (PMA_getPlugins($type = 'compression') as $plugin) {
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if ($plugin['classname']::canHandle($this->getName())) {
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$this->setCompressionPlugin($plugin);
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break;
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}
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}
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*/
|
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$test = fread($file, 4);
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$len = strlen($test);
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fclose($file);
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if ($len >= 2 && $test[0] == chr(31) && $test[1] == chr(139)) {
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$this->_compression = 'application/gzip';
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} elseif ($len >= 3 && substr($test, 0, 3) == 'BZh') {
|
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$this->_compression = 'application/bzip2';
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} elseif ($len >= 4 && $test == "PK\003\004") {
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$this->_compression = 'application/zip';
|
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} else {
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$this->_compression = 'none';
|
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}
|
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|
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return $this->_compression;
|
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}
|
|
|
|
/**
|
|
* Sets whether the content should be decompressed before returned
|
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*
|
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* @param boolean $decompress whether to decompres
|
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*
|
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* @return void
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*/
|
|
public function setDecompressContent($decompress)
|
|
{
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$this->_decompress = (bool) $decompress;
|
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}
|
|
|
|
/**
|
|
* Returns the file handle
|
|
*
|
|
* @return resource file handle
|
|
*/
|
|
public function getHandle()
|
|
{
|
|
if (null === $this->_handle) {
|
|
$this->open();
|
|
}
|
|
return $this->_handle;
|
|
}
|
|
|
|
/**
|
|
* Sets the file handle
|
|
*
|
|
* @param object $handle file handle
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setHandle($handle)
|
|
{
|
|
$this->_handle = $handle;
|
|
}
|
|
|
|
|
|
/**
|
|
* Sets error message for unsupported compression.
|
|
*
|
|
* @return void
|
|
*/
|
|
public function errorUnsupported()
|
|
{
|
|
$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()
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Attempts to open the file.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public 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 {
|
|
$this->errorUnsupported();
|
|
return false;
|
|
}
|
|
break;
|
|
case 'application/gzip':
|
|
if ($GLOBALS['cfg']['GZipDump'] && @function_exists('gzopen')) {
|
|
$this->_handle = @gzopen($this->getName(), 'r');
|
|
} else {
|
|
$this->errorUnsupported();
|
|
return false;
|
|
}
|
|
break;
|
|
case 'application/zip':
|
|
if ($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->errorUnsupported();
|
|
return false;
|
|
}
|
|
break;
|
|
case 'none':
|
|
$this->_handle = @fopen($this->getName(), 'r');
|
|
break;
|
|
default:
|
|
$this->errorUnsupported();
|
|
return false;
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns the character set of the file
|
|
*
|
|
* @return string character set of the file
|
|
*/
|
|
public function getCharset()
|
|
{
|
|
return $this->_charset;
|
|
}
|
|
|
|
/**
|
|
* Sets the character set of the file
|
|
*
|
|
* @param string $charset character set of the file
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setCharset($charset)
|
|
{
|
|
$this->_charset = $charset;
|
|
}
|
|
|
|
/**
|
|
* Returns compression used by file.
|
|
*
|
|
* @return string MIME type of compression, none for none
|
|
* @access public
|
|
*/
|
|
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 $length numbers of chars/bytes to skip
|
|
*
|
|
* @return boolean
|
|
* @todo this function is unused
|
|
*/
|
|
public function advanceFilePointer($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
|
|
*
|
|
* @param int $max_size maximum size of the next chunk to be returned
|
|
*
|
|
* @return bool|string
|
|
* @todo this function is unused
|
|
*/
|
|
public function getNextChunk($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']) {
|
|
$result = PMA_convertString($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;
|
|
}
|
|
|
|
/**
|
|
* Returns the offset
|
|
*
|
|
* @return integer the offset
|
|
*/
|
|
public function getOffset()
|
|
{
|
|
return $this->_offset;
|
|
}
|
|
|
|
/**
|
|
* Returns the chunk size
|
|
*
|
|
* @return integer the chunk size
|
|
*/
|
|
public function getChunkSize()
|
|
{
|
|
return $this->_chunk_size;
|
|
}
|
|
|
|
/**
|
|
* Sets the chunk size
|
|
*
|
|
* @param integer $chunk_size the chunk size
|
|
*
|
|
* @return void
|
|
*/
|
|
public function setChunkSize($chunk_size)
|
|
{
|
|
$this->_chunk_size = (int) $chunk_size;
|
|
}
|
|
|
|
/**
|
|
* Returns the length of the content in the file
|
|
*
|
|
* @return integer the length of the file content
|
|
*/
|
|
public function getContentLength()
|
|
{
|
|
return strlen($this->_content);
|
|
}
|
|
|
|
/**
|
|
* Returns whether the end of the file has been reached
|
|
*
|
|
* @return boolean whether the end of the file has been reached
|
|
*/
|
|
public function eof()
|
|
{
|
|
if ($this->getHandle()) {
|
|
return feof($this->getHandle());
|
|
} else {
|
|
return ($this->getOffset() >= $this->getContentLength());
|
|
}
|
|
|
|
}
|
|
}
|
|
?>
|