Adding Content-Length header
=============

Adding a ``Content-Length`` header for ``ZipStream`` is not trivial since the
size is not known beforehand.

The following workaround adds an approximated header:

.. code-block:: php

    class Zip
    {
        /** @var string */
        private $name;

        private $files = [];

        public function __construct($name)
        {
            $this->name = $name;
        }

        public function addFile($name, $data)
        {
            $this->files[] = ['type' => 'addFile', 'name' => $name, 'data' => $data];
        }

        public function addFileFromPath($name, $path)
        {
            $this->files[] = ['type' => 'addFileFromPath', 'name' => $name, 'path' => $path];
        }

        public function getEstimate()
        {
            $estimate = 22;
            foreach ($this->files as $file) {
            $estimate += 76 + 2 * strlen($file['name']);
            if ($file['type'] === 'addFile') {
                $estimate += strlen($file['data']);
            }
            if ($file['type'] === 'addFileFromPath') {
                $estimate += filesize($file['path']);
            }
            }
            return $estimate;
        }

        public function finish()
        {
            header('Content-Length: ' . $this->getEstimate());
            $options = new \ZipStream\Option\Archive();
            $options->setSendHttpHeaders(true);
            $options->setEnableZip64(false);
            $options->setDeflateLevel(-1);
            $zip = new \ZipStream\ZipStream($this->name, $options);

            $fileOptions = new \ZipStream\Option\File();
            $fileOptions->setMethod(\ZipStream\Option\Method::STORE());
            foreach ($this->files as $file) {
            if ($file['type'] === 'addFile') {
                $zip->addFile($file['name'], $file['data'], $fileOptions);
            }
            if ($file['type'] === 'addFileFromPath') {
                $zip->addFileFromPath($file['name'], $file['path'], $fileOptions);
            }
            }
            $zip->finish();
            exit;
        }
    }

It only works with the following constraints:

- All file content is known beforehand.
- Content Deflation is disabled

Thanks to
`partiellkorrekt <https://github.com/maennchen/ZipStream-PHP/issues/89#issuecomment-1047949274>`_
for this workaround.

• [F] ContentLength.rst
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• [F] index.rst
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• [F] Nginx.rst
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• [F] Options.rst
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• [F] PSR7Streams.rst
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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"
                        
}