Yii resumable implementing - php

Question

I have a task to implement resumable in Yii, and I implemented upload control, but never Resumable before.
public function actionUpload()
{
$model=new User;
if(isset($_POST['User'])) {
$model->attributes=$_POST['User'];
$model->image=CUploadedFile::getInstance($model,'image');
if($model->save()) {
$model->image->saveAs('upload/'.$model->image->name);
$this->redirect(array('view','id'=>$model->uUserID));
}
}
$this->render('upload',array('model'=>$model));
}
The task is to chunk file in small pieces.
Example: one file can be 1 GB. And I try to send that file with rest service.

Answer 1

See Sample server implementation in PHP
I copy-paste here essential part of the code, provided on that page:
/**
*
* Check if all the parts exist, and
* gather all the parts of the file together
* #param string $dir - the temporary directory holding all the parts of the file
* #param string $fileName - the original file name
* #param string $chunkSize - each chunk size (in bytes)
* #param string $totalSize - original file size (in bytes)
*/
function createFileFromChunks($temp_dir, $fileName, $chunkSize, $totalSize) {
// count all the parts of this file
$total_files = 0;
foreach(scandir($temp_dir) as $file) {
if (stripos($file, $fileName) !== false) {
$total_files++;
}
}
// check that all the parts are present
// the size of the last part is between chunkSize and 2*$chunkSize
if ($total_files * $chunkSize >= ($totalSize - $chunkSize + 1)) {
// create the final destination file
if (($fp = fopen('temp/'.$fileName, 'w')) !== false) {
for ($i=1; $i<=$total_files; $i++) {
fwrite($fp, file_get_contents($temp_dir.'/'.$fileName.'.part'.$i));
_log('writing chunk '.$i);
}
fclose($fp);
} else {
_log('cannot create the destination file');
return false;
}
// rename the temporary directory (to avoid access from other
// concurrent chunks uploads) and than delete it
if (rename($temp_dir, $temp_dir.'_UNUSED')) {
rrmdir($temp_dir.'_UNUSED');
} else {
rrmdir($temp_dir);
}
}
}