<?php

namespace PhpOffice\PhpSpreadsheet\Helper;

use PhpOffice\PhpSpreadsheet\Exception;

class Downloader
{
    protected string $filepath;

    protected string $filename;

    protected string $filetype;

    protected const CONTENT_TYPES = [
        'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
        'xls' => 'application/vnd.ms-excel',
        'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
        'csv' => 'text/csv',
        'html' => 'text/html',
        'pdf' => 'application/pdf',
    ];

    public function __construct(string $folder, string $filename, ?string $filetype = null)
    {
        if ((is_dir($folder) === false) || (is_readable($folder) === false)) {
            throw new Exception("Folder {$folder} is not accessable");
        }
        $filepath = "{$folder}/{$filename}";
        $this->filepath = (string) realpath($filepath);
        $this->filename = basename($filepath);
        if ((file_exists($this->filepath) === false) || (is_readable($this->filepath) === false)) {
            throw new Exception("{$this->filename} not found, or cannot be read");
        }

        $filetype ??= pathinfo($filename, PATHINFO_EXTENSION);
        if (array_key_exists(strtolower($filetype), self::CONTENT_TYPES) === false) {
            throw new Exception("Invalid filetype: {$filetype} cannot be downloaded");
        }
        $this->filetype = strtolower($filetype);
    }

    public function download(): void
    {
        $this->headers();

        readfile($this->filepath);
    }

    public function headers(): void
    {
        ob_clean();

        $this->contentType();
        $this->contentDisposition();
        $this->cacheHeaders();
        $this->fileSize();

        flush();
    }

    protected function contentType(): void
    {
        header('Content-Type: ' . self::CONTENT_TYPES[$this->filetype]);
    }

    protected function contentDisposition(): void
    {
        header('Content-Disposition: attachment;filename="' . $this->filename . '"');
    }

    protected function cacheHeaders(): void
    {
        header('Cache-Control: max-age=0');
        // If you're serving to IE 9, then the following may be needed
        header('Cache-Control: max-age=1');

        // If you're serving to IE over SSL, then the following may be needed
        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
        header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
        header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
        header('Pragma: public'); // HTTP/1.0
    }

    protected function fileSize(): void
    {
        header('Content-Length: ' . filesize($this->filepath));
    }
}

• [F] Dimension.php
  Delete
• [F] Downloader.php
  Delete
• [F] Handler.php
  Delete
• [F] Html.php
  Delete
• [F] Sample.php
  Delete
• [F] Size.php
  Delete
• [F] TextGrid.php
  Delete

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                        Request Example (guzzle)
                        

                        
                            
<?php
                            
 require_once('vendor/autoload.php');
                            
 $client = new \GuzzleHttp\Client();
                            
 $response = $client->request('POST', $base_url. 'v1/generate-token', [
                            
'headers' => [
                            
  'accept' => 'application/json',
                            
  'content-type' => 'application/json',
                            
 ],
                            
'form_params' => [
                            
  'client_id'     => '$client_id',
                            
  'secret_id'     => 'secret_id',
                            
  'env'           => 'env',
                            
  'merchant_id'   => 'merchant_id',
                            
 ],
                            
                            
]);
                            
echo $response->getBody();
                        
                    
                

                    
                        
**Response: SUCCESS (200 OK)**
                        
{
                        
 "message": {
                        
 "success": [
                        
  "Successfully token is generated"
                        
 ]
                        
},
                        
"data": {
                        
 "token":"eyJpdiI6InpkczhjTjhQdVhUL2lKQ0pSUUx6aUE9P
SIsInZhbHVlIjoiVGVBTVBDTXltbjNZcEIvdEJveGpTSno3TU5NRUtn
VkhCZ1pHTFNCUnZGQ2UxMnYxN202cEE1YVRDTEFsc0ZERExoTjdtL0dTL2x
oU3QzeUJJOExiMUx5T0w1L0llUXhTUkU1cWVLWEdEbEplb0dKNXcwbTNRM0
VxdkUwYzZuNFdtNkhMQ0pRZysyNWkvdzBxSlBoSVBSOGFTekNnR2RXNHVtc
G9lMGZOTmNCcm1hR3c5Sk9KTnB4Y3ltZDl6cm90MThrR21Ca3B1azc3bXRi
Q0J6SW96UVo1elNkU1ZqeE05bTcwWGp1MEUxWlJFdnNWTmpSbnVpeW92b2U
4dXZkUGgyb1VmK0luaGdyaFlsVTZlcVpVRnZlTG1DeFF6Ykk2T2h6Z3Jzbn
IyNHpNdHowSE5JdDR0Y0pZT20zUm1XYW8iLCJtYWMiOiJlY2M4NGE1OGUzYz
kzYzk0YzljNmVmNjE0YWI0ZDIwOGI3NDQ2YWEyY2ZhNzc0NzE4ZmY1ZmYyMz

                        IyZmQzNDY1IiwidGFnIjoiIn0=",
                        
},
                        
"type": "success"
                        
}
                    
                

                    
                        
**Response: ERROR (400 FAILED)**
                        
{
                        
 "message": {
                        
 "error": [
                        
  "Invalid credentials."
                        
 ]
                        
},
                        
"data": null,
                        
"type": "error"
                        
}