How create and open a zip file which is building straight away? - php

Question

I need to be able to open the zip file straight away when we hit the page for download even if the zip file is not created in the server yet.
Is there any way to do this? Because for the moment it takes a lot of time to get the page the start of the download of the zip file.
I'm also getting timeout issue because it takes too much time to build the zip.
$this->loadModel('JobFiles');
$this->loadComponent('Images');
$job_nbr = '40819-o';
$purpose = 'client';
if (isset($this->request->data['type']) && $this->request->data['type'] != '') {
$type = $this->request->data['type'];
$my_files = $this->JobFiles
->find()
->where([
'JobFiles.job_number' => $job_nbr,
'JobFiles.type' => $type,
'JobFiles.purpose' => $purpose
]);
} else {
$my_files = $this->JobFiles
->find()
->where([
'JobFiles.job_number' => $job_nbr,
'JobFiles.purpose' => $purpose
]);
}
$files = array();
$key = 0;
foreach( $my_files as $file ){
// If photo and extension are jpg we provide other files type
if ($file->type == 'photos' && $file->extension == 'jpg' || $file->extension == 'JPG'):
$c = $file->ObjectURL;
$file_headers = #get_headers($c);
if(!$file_headers || $file_headers[0] == 'HTTP/1.1 404 Not Found') {
$exists = false;
}
else {
$files['photos'][$key]['original_file'] = $file->ObjectURL;
$files['photos'][$key]['name'] = $file->filename;
$files['photos'][$key]['type'] = $file->type;
$files['photos'][$key]['id'] = $file->id;
$key++;
}
endif;
if ($file->type == 'floorplan'):
$files['floorplan'][$key]['original_file'] = $file->ObjectURL;
$key++;
endif;
if ($file->type == 'video'):
$files['video'][$key]['original_file'] = $file->ObjectURL;
$key++;
endif;
}
$zipname = "watherver.zip";
$zip = new ZipArchive();
$zip_full_path_name = \Cake\Core\Configure::read('pathTo') . '/webroot/img/tmp/zip/' . $zipname;
$zip->open($zip_full_path_name, ZIPARCHIVE::CREATE);
foreach ($files['photos'] as $file) {
$context = stream_context_create(array('http' => array('header'=>'Connection: close\r\n')));
$parsed_file = $file['original_file'];
$download_file = file_get_contents($parsed_file, false,$context);
$zip->addFromString('photos/original/' . basename($parsed_file), $download_file);
}
$zip->close();
//Set headers
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-type: application/octet-stream");
header("Content-Disposition: attachment; filename='" . $zipName . "'");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . filesize($zipName));
Cheers,