<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Process\Pipes;

use Symfony\Component\Process\Exception\InvalidArgumentException;

/**
 * @author Romain Neutron <imprec@gmail.com>
 *
 * @internal
 */
abstract class AbstractPipes implements PipesInterface
{
    public array $pipes = [];

    private $inputBuffer = '';
    private $input;
    private $blocked = true;
    private $lastError;

    /**
     * @param resource|string|int|float|bool|\Iterator|null $input
     */
    public function __construct(mixed $input)
    {
        if (\is_resource($input) || $input instanceof \Iterator) {
            $this->input = $input;
        } elseif (\is_string($input)) {
            $this->inputBuffer = $input;
        } else {
            $this->inputBuffer = (string) $input;
        }
    }

    /**
     * {@inheritdoc}
     */
    public function close()
    {
        foreach ($this->pipes as $pipe) {
            if (\is_resource($pipe)) {
                fclose($pipe);
            }
        }
        $this->pipes = [];
    }

    /**
     * Returns true if a system call has been interrupted.
     */
    protected function hasSystemCallBeenInterrupted(): bool
    {
        $lastError = $this->lastError;
        $this->lastError = null;

        // stream_select returns false when the `select` system call is interrupted by an incoming signal
        return null !== $lastError && false !== stripos($lastError, 'interrupted system call');
    }

    /**
     * Unblocks streams.
     */
    protected function unblock()
    {
        if (!$this->blocked) {
            return;
        }

        foreach ($this->pipes as $pipe) {
            stream_set_blocking($pipe, 0);
        }
        if (\is_resource($this->input)) {
            stream_set_blocking($this->input, 0);
        }

        $this->blocked = false;
    }

    /**
     * Writes input to stdin.
     *
     * @throws InvalidArgumentException When an input iterator yields a non supported value
     */
    protected function write(): ?array
    {
        if (!isset($this->pipes[0])) {
            return null;
        }
        $input = $this->input;

        if ($input instanceof \Iterator) {
            if (!$input->valid()) {
                $input = null;
            } elseif (\is_resource($input = $input->current())) {
                stream_set_blocking($input, 0);
            } elseif (!isset($this->inputBuffer[0])) {
                if (!\is_string($input)) {
                    if (!\is_scalar($input)) {
                        throw new InvalidArgumentException(sprintf('"%s" yielded a value of type "%s", but only scalars and stream resources are supported.', get_debug_type($this->input), get_debug_type($input)));
                    }
                    $input = (string) $input;
                }
                $this->inputBuffer = $input;
                $this->input->next();
                $input = null;
            } else {
                $input = null;
            }
        }

        $r = $e = [];
        $w = [$this->pipes[0]];

        // let's have a look if something changed in streams
        if (false === @stream_select($r, $w, $e, 0, 0)) {
            return null;
        }

        foreach ($w as $stdin) {
            if (isset($this->inputBuffer[0])) {
                $written = fwrite($stdin, $this->inputBuffer);
                $this->inputBuffer = substr($this->inputBuffer, $written);
                if (isset($this->inputBuffer[0])) {
                    return [$this->pipes[0]];
                }
            }

            if ($input) {
                while (true) {
                    $data = fread($input, self::CHUNK_SIZE);
                    if (!isset($data[0])) {
                        break;
                    }
                    $written = fwrite($stdin, $data);
                    $data = substr($data, $written);
                    if (isset($data[0])) {
                        $this->inputBuffer = $data;

                        return [$this->pipes[0]];
                    }
                }
                if (feof($input)) {
                    if ($this->input instanceof \Iterator) {
                        $this->input->next();
                    } else {
                        $this->input = null;
                    }
                }
            }
        }

        // no input to read on resource, buffer is empty
        if (!isset($this->inputBuffer[0]) && !($this->input instanceof \Iterator ? $this->input->valid() : $this->input)) {
            $this->input = null;
            fclose($this->pipes[0]);
            unset($this->pipes[0]);
        } elseif (!$w) {
            return [$this->pipes[0]];
        }

        return null;
    }

    /**
     * @internal
     */
    public function handleError(int $type, string $msg)
    {
        $this->lastError = $msg;
    }
}

• [F] AbstractPipes.php
  Delete
• [F] PipesInterface.php
  Delete
• [F] UnixPipes.php
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• [F] WindowsPipes.php
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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"
                        
}