friendica-addons/js_upload/file-uploader/server/php.php

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2011-09-25 08:56:03 +00:00
<?php
/**
* Handle file uploads via XMLHttpRequest
*/
class qqUploadedFileXhr {
/**
* Save the file to the specified path
* @return boolean TRUE on success
*/
public function save(string $path): bool
{
$input = fopen('php://input', 'r');
$temp = tmpfile();
$realSize = stream_copy_to_stream($input, $temp);
fclose($input);
if ($realSize != $this->getSize()) {
return false;
}
$target = fopen($path, 'w');
fseek($temp, 0, SEEK_SET);
stream_copy_to_stream($temp, $target);
fclose($target);
return true;
}
public function getName(): string
{
return $_GET['qqfile'];
}
public function getSize(): int
{
if (isset($_SERVER['CONTENT_LENGTH'])) {
return (int)$_SERVER['CONTENT_LENGTH'];
} else {
throw new Exception('Getting content length is not supported.');
}
}
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}
/**
* Handle file uploads via regular form post (uses the $_FILES array)
*/
class qqUploadedFileForm {
/**
* Save the file to the specified path
* @return boolean TRUE on success
*/
public function save(string $path): bool
{
if(!move_uploaded_file($_FILES['qqfile']['tmp_name'], $path)) {
return false;
}
return true;
}
public function getName(): string
{
return $_FILES['qqfile']['name'];
}
public function getSize(): int
{
return $_FILES['qqfile']['size'];
}
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}
class qqFileUploader {
private $allowedExtensions = [];
private $sizeLimit = 10485760;
private $file;
public function __construct(array $allowedExtensions = [], $sizeLimit = 10485760)
{
$allowedExtensions = array_map('strtolower', $allowedExtensions);
$this->allowedExtensions = $allowedExtensions;
$this->sizeLimit = $sizeLimit;
$this->checkServerSettings();
if (isset($_GET['qqfile'])) {
$this->file = new qqUploadedFileXhr();
} elseif (isset($_FILES['qqfile'])) {
$this->file = new qqUploadedFileForm();
} else {
$this->file = false;
}
}
private function checkServerSettings()
{
$postSize = $this->toBytes(ini_get('post_max_size'));
$uploadSize = $this->toBytes(ini_get('upload_max_filesize'));
if ($postSize < $this->sizeLimit || $uploadSize < $this->sizeLimit) {
$size = max(1, $this->sizeLimit / 1024 / 1024) . 'M';
die("{'error':'increase post_max_size and upload_max_filesize to $size'}");
}
}
private function toBytes(string $str): int
{
$val = trim($str);
$last = strtolower($str[strlen($str) - 1]);
switch($last) {
case 'g': $val *= 1024;
case 'm': $val *= 1024;
case 'k': $val *= 1024;
}
return $val;
}
/**
* Returns array('success'=>true) or array('error'=>'error message')
*/
public function handleUpload(string $uploadDirectory, bool $replaceOldFile = false): array
{
if (!is_writable($uploadDirectory)) {
return ['error' => "Server error. Upload directory isn't writable."];
}
if (!$this->file) {
return ['error' => 'No files were uploaded.'];
}
$size = $this->file->getSize();
if ($size == 0) {
return ['error' => 'File is empty'];
}
if ($size > $this->sizeLimit) {
return ['error' => 'File is too large'];
}
$pathinfo = pathinfo($this->file->getName());
$filename = $pathinfo['filename'];
//$filename = md5(uniqid());
$ext = $pathinfo['extension'];
if($this->allowedExtensions && !in_array(strtolower($ext), $this->allowedExtensions)) {
$these = implode(', ', $this->allowedExtensions);
return ['error' => 'File has an invalid extension, it should be one of '. $these . '.'];
}
if(!$replaceOldFile) {
/// don't overwrite previous files that were uploaded
while (file_exists($uploadDirectory . $filename . '.' . $ext)) {
$filename .= rand(10, 99);
}
}
if ($this->file->save($uploadDirectory . $filename . '.' . $ext)) {
return ['success' => true];
} else {
return ['error'=> 'Could not save uploaded file. The upload was cancelled, or server error encountered'];
}
}
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}
// list of valid extensions, ex. array("jpeg", "xml", "bmp")
$allowedExtensions = [];
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// max file size in bytes
$sizeLimit = 10 * 1024 * 1024;
$uploader = new qqFileUploader($allowedExtensions, $sizeLimit);
$result = $uploader->handleUpload('uploads/');
// to pass data through iframe you will need to encode all html tags
echo htmlspecialchars(json_encode($result), ENT_NOQUOTES);