162 lines
5 KiB
PHP
162 lines
5 KiB
PHP
<?php
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/**
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* Handle file uploads via XMLHttpRequest
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*/
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class qqUploadedFileXhr {
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/**
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* Save the file to the specified path
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* @return boolean TRUE on success
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*/
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function save($path) {
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$input = fopen("php://input", "r");
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$temp = tmpfile();
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$realSize = stream_copy_to_stream($input, $temp);
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fclose($input);
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if ($realSize != $this->getSize()){
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return false;
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}
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$target = fopen($path, "w");
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fseek($temp, 0, SEEK_SET);
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stream_copy_to_stream($temp, $target);
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fclose($target);
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return true;
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}
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function getName() {
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return $_GET['qqfile'];
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}
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function getSize() {
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if (isset($_SERVER["CONTENT_LENGTH"])){
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return (int)$_SERVER["CONTENT_LENGTH"];
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} else {
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throw new Exception('Getting content length is not supported.');
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}
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}
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}
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/**
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* Handle file uploads via regular form post (uses the $_FILES array)
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*/
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class qqUploadedFileForm {
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/**
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* Save the file to the specified path
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* @return boolean TRUE on success
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*/
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function save($path) {
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if(!move_uploaded_file($_FILES['qqfile']['tmp_name'], $path)){
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return false;
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}
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return true;
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}
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function getName() {
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return $_FILES['qqfile']['name'];
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}
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function getSize() {
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return $_FILES['qqfile']['size'];
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}
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}
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class qqFileUploader {
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private $allowedExtensions = array();
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private $sizeLimit = 10485760;
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private $file;
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function __construct(array $allowedExtensions = array(), $sizeLimit = 10485760){
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$allowedExtensions = array_map("strtolower", $allowedExtensions);
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$this->allowedExtensions = $allowedExtensions;
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$this->sizeLimit = $sizeLimit;
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$this->checkServerSettings();
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if (isset($_GET['qqfile'])) {
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$this->file = new qqUploadedFileXhr();
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} elseif (isset($_FILES['qqfile'])) {
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$this->file = new qqUploadedFileForm();
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} else {
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$this->file = false;
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}
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}
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private function checkServerSettings(){
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$postSize = $this->toBytes(ini_get('post_max_size'));
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$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));
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if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit){
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$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
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die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
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}
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}
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private function toBytes($str){
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$val = trim($str);
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$last = strtolower($str[strlen($str)-1]);
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switch($last) {
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case 'g': $val *= 1024;
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case 'm': $val *= 1024;
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case 'k': $val *= 1024;
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}
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return $val;
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}
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/**
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* Returns array('success'=>true) or array('error'=>'error message')
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*/
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function handleUpload($uploadDirectory, $replaceOldFile = FALSE){
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if (!is_writable($uploadDirectory)){
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return array('error' => "Server error. Upload directory isn't writable.");
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}
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if (!$this->file){
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return array('error' => 'No files were uploaded.');
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}
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$size = $this->file->getSize();
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if ($size == 0) {
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return array('error' => 'File is empty');
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}
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if ($size > $this->sizeLimit) {
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return array('error' => 'File is too large');
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}
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$pathinfo = pathinfo($this->file->getName());
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$filename = $pathinfo['filename'];
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//$filename = md5(uniqid());
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$ext = $pathinfo['extension'];
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if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)){
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$these = implode(', ', $this->allowedExtensions);
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return array('error' => 'File has an invalid extension, it should be one of '. $these . '.');
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}
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if(!$replaceOldFile){
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/// don't overwrite previous files that were uploaded
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while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
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$filename .= rand(10, 99);
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}
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}
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if ($this->file->save($uploadDirectory . $filename . '.' . $ext)){
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return array('success'=>true);
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} else {
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return array('error'=> 'Could not save uploaded file.' .
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'The upload was cancelled, or server error encountered');
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}
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}
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}
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// list of valid extensions, ex. array("jpeg", "xml", "bmp")
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$allowedExtensions = array();
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// max file size in bytes
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$sizeLimit = 10 * 1024 * 1024;
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$uploader = new qqFileUploader($allowedExtensions, $sizeLimit);
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$result = $uploader->handleUpload('uploads/');
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// to pass data through iframe you will need to encode all html tags
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echo htmlspecialchars(json_encode($result), ENT_NOQUOTES);
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