mirror of
https://github.com/EGroupware/egroupware.git
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304 lines
8.9 KiB
PHP
304 lines
8.9 KiB
PHP
<?php
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/**
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* EGroupware - eTemplate serverside file upload widget
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*
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* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
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* @package etemplate
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* @subpackage api
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* @link http://www.egroupware.org
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* @author Nathan Gray
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* @copyright 2011 Nathan Gray
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* @version $Id$
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*/
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/**
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* eTemplate file upload widget
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* Uses AJAX to send file(s) to server, and stores for submit
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*/
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class etemplate_widget_file extends etemplate_widget
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{
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/**
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* Constructor
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*
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* @param string $xml
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*/
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public function __construct($xml='')
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{
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if($xml) parent::__construct($xml);
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// Legacy multiple - id ends in []
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if(substr($this->id,-2) == '[]')
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{
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$this->setElementAttribute($this->id, 'multiple', true);
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}
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}
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/**
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* Ajax callback to receive an incoming file
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*
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* The incoming file is moved from its temporary location (otherwise server will delete it) and
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* the file information is stored into the widget's value. When the form is submitted, the information for all
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* files uploaded is available in the returned $content array. Because files are uploaded asynchronously,
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* submission should be quick.
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*
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* @note Currently, no attempt is made to clean up files automatically.
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*/
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public static function ajax_upload() {
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$response = egw_json_response::get();
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$request_id = str_replace(' ', '+', rawurldecode($_REQUEST['request_id']));
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$widget_id = $_REQUEST['widget_id'];
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if(!self::$request = etemplate_request::read($request_id)) {
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$response->error("Could not read session");
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return;
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}
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if (!($template = etemplate_widget_template::instance(self::$request->template['name'], self::$request->template['template_set'],
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self::$request->template['version'], self::$request->template['load_via'])))
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{
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// Can't use callback
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error_log("Could not get template for file upload, callback skipped");
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}
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$file_data = array();
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// There should only be one file, as they're sent one at a time
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foreach ($_FILES as $field => &$files)
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{
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$widget = $template->getElementById($widget_id ? $widget_id : $field);
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if($widget && $widget->attrs['mime']) {
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$mime = $widget->attrs['mime'];
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}
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// Check for legacy [] in id to indicate multiple - it changes format
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if(is_array($files['name'])) {
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$file_list = array();
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foreach($files as $f_field => $values)
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{
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foreach($values as $key => $f_value) {
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$file_list[$key][$f_field] = $f_value;
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}
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}
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foreach($file_list as $file)
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{
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self::process_uploaded_file($field, $file, $mime, $file_data);
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}
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}
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else
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{
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// Just one file
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self::process_uploaded_file($field, $files, $mime, $file_data);
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}
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}
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// Set up response
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$response->data($file_data);
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// Check for a callback, call it if there is one
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foreach($_FILES as $field => $file) {
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if($element = $template->getElementById($field))
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{
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$callback = $element->attrs['callback'];
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if(!$callback) $callback = $template->getElementAttribute($field, 'callback');
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if($callback)
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{
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ExecMethod($callback, $_FILES[$field]);
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}
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}
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}
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}
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/**
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* Process one uploaded file. There should only be one per request...
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*/
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protected static function process_uploaded_file($field, Array &$file, $mime, Array &$file_data)
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{
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// Chunks get mangled a little
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if($file['name'] == 'blob')
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{
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$file['name'] = $_POST['resumableFilename'];
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$file['type'] = $_POST['resumableType'];
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}
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if ($file['error'] == UPLOAD_ERR_OK && trim($file['name']) != '' && $file['size'] > 0 && is_uploaded_file($file['tmp_name'])) {
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// Mime check
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if($mime)
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{
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$type = $file['type'];
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$is_preg = $mime[0] == '/';
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if (!$is_preg && strcasecmp($mime,$type) ||
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$is_preg && !preg_match($mime,$type))
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{
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$file_data[$file['name']] = $file['name'].':'.lang('File is of wrong type (%1 != %2)!',$type,$mime);
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//error_log(__METHOD__.__LINE__.array2string($file_data[$file['name']]));
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return false;
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}
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}
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// Resumable / chunked uploads
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// init the destination file (format <filename.ext>.part<#chunk>
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// the file is stored in a temporary directory
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$temp_dir = $GLOBALS['egw_info']['server']['temp_dir'].'/'.str_replace('/','_',$_POST['resumableIdentifier']);
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$dest_file = $temp_dir.'/'.str_replace('/','_',$_POST['resumableFilename']).'.part'.(int)$_POST['resumableChunkNumber'];
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// create the temporary directory
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if (!is_dir($temp_dir))
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{
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mkdir($temp_dir, 0755, true);
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}
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// move the temporary file
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if (!move_uploaded_file($file['tmp_name'], $dest_file))
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{
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$file_data[$file['name']] = 'Error saving (move_uploaded_file) chunk '.(int)$_POST['resumableChunkNumber'].' for file '.$_POST['resumableFilename'];
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}
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else
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{
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// check if all the parts present, and create the final destination file
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$new_file = self::createFileFromChunks($temp_dir, str_replace('/','_',$_POST['resumableFilename']),
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$_POST['resumableChunkSize'], $_POST['resumableTotalSize']);
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}
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if( $new_file) {
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$file['tmp_name'] = $new_file;
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// Data to send back to client
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$temp_name = basename($file['tmp_name']);
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$file_data[$temp_name] = array(
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// Use egw_vfs to avoid UTF8 / non-ascii issues
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'name' => egw_vfs::basename($file['name']),
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'type' => $file['type']
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);
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}
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}
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}
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/**
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*
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* Check if all the parts exist, and
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* gather all the parts of the file together
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*
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* From Resumable samples - http://resumablejs.com/
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* @param string $dir - the temporary directory holding all the parts of the file
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* @param string $fileName - the original file name
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* @param string $chunkSize - each chunk size (in bytes)
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* @param string $totalSize - original file size (in bytes)
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*/
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private static function createFileFromChunks($temp_dir, $fileName, $chunkSize, $totalSize) {
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// count all the parts of this file
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$total_files = 0;
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foreach(scandir($temp_dir) as $file) {
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if (stripos($file, $fileName) !== false) {
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$total_files++;
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}
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}
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// check that all the parts are present
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// the size of the last part is between chunkSize and 2*$chunkSize
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if ($total_files * $chunkSize >= ($totalSize - $chunkSize + 1)) {
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if (is_dir($GLOBALS['egw_info']['server']['temp_dir']) && is_writable($GLOBALS['egw_info']['server']['temp_dir']))
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{
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$new_file = tempnam($GLOBALS['egw_info']['server']['temp_dir'],'egw_');
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}
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else
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{
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$new_file = $file['tmp_name'].'+';
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}
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// create the final destination file
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if (($fp = fopen($new_file, 'w')) !== false) {
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for ($i=1; $i<=$total_files; $i++) {
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fwrite($fp, file_get_contents($temp_dir.'/'.$fileName.'.part'.$i));
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}
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fclose($fp);
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} else {
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_log('cannot create the destination file');
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return false;
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}
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// rename the temporary directory (to avoid access from other
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// concurrent chunks uploads) and than delete it
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if (rename($temp_dir, $temp_dir.'_UNUSED')) {
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self::rrmdir($temp_dir.'_UNUSED');
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} else {
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self::rrmdir($temp_dir);
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}
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return $new_file;
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}
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return false;
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}
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/**
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* Delete a directory RECURSIVELY
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* @param string $dir - directory path
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* @link http://php.net/manual/en/function.rmdir.php
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*/
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private static function rrmdir($dir) {
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if (is_dir($dir)) {
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$objects = scandir($dir);
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foreach ($objects as $object) {
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if ($object != "." && $object != "..") {
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if (filetype($dir . "/" . $object) == "dir") {
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rrmdir($dir . "/" . $object);
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} else {
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unlink($dir . "/" . $object);
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}
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}
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}
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reset($objects);
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rmdir($dir);
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}
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}
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/**
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* Validate input
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* Merge any already uploaded files into the content array
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*
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* @param string $cname current namespace
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* @param array $expand values for keys 'c', 'row', 'c_', 'row_', 'cont'
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* @param array $content
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* @param array &$validated=array() validated content
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*/
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public function validate($cname, array $expand, array $content, &$validated=array())
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{
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$form_name = self::form_name($cname, $this->id, $expand);
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if (!$this->is_readonly($cname, $form_name))
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{
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$value = $value_in = self::get_array($content, $form_name);
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$valid =& self::get_array($validated, $form_name, true);
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if(!is_array($value)) $value = array();
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// Incoming values indexed by temp name
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if($value[0]) $value = $value[0];
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foreach($value as $tmp => $file)
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{
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if(!$file) continue;
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if (is_dir($GLOBALS['egw_info']['server']['temp_dir']) && is_writable($GLOBALS['egw_info']['server']['temp_dir']))
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{
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$path = $GLOBALS['egw_info']['server']['temp_dir'].'/'.$tmp;
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}
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else
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{
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$path = $tmp.'+';
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}
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$stat = stat($path);
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$valid[] = array(
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'name' => $file['name'],
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'type' => $file['type'],
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'tmp_name' => $path,
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'error' => UPLOAD_ERR_OK, // Always OK if we get this far
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'size' => $stat['size'],
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'ip' => $_SERVER['REMOTE_ADDR'], // Assume it's the same as for when it was uploaded...
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);
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}
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if($valid && !$this->attrs['multiple']) $valid = $valid[0];
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}
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}
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}
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etemplate_widget::registerWidget('etemplate_widget_file', array('file'));
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