<?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\HttpFoundation;

use Symfony\Component\HttpFoundation\File\Exception\FileException;
use Symfony\Component\HttpFoundation\File\File;

/**
 * BinaryFileResponse represents an HTTP response delivering a file.
 *
 * @author Niklas Fiekas <niklas.fiekas@tu-clausthal.de>
 * @author stealth35 <stealth35-php@live.fr>
 * @author Igor Wiedler <igor@wiedler.ch>
 * @author Jordan Alliot <jordan.alliot@gmail.com>
 * @author Sergey Linnik <linniksa@gmail.com>
 */
class BinaryFileResponse extends Response
{
    protected static bool $trustXSendfileTypeHeader = false;

    protected File $file;
    protected ?\SplTempFileObject $tempFileObject = null;
    protected int $offset = 0;
    protected int $maxlen = -1;
    protected bool $deleteFileAfterSend = false;
    protected int $chunkSize = 16 * 1024;

    /**
     * @param \SplFileInfo|string $file               The file to stream
     * @param int                 $status             The response status code (200 "OK" by default)
     * @param array               $headers            An array of response headers
     * @param bool                $public             Files are public by default
     * @param string|null         $contentDisposition The type of Content-Disposition to set automatically with the filename
     * @param bool                $autoEtag           Whether the ETag header should be automatically set
     * @param bool                $autoLastModified   Whether the Last-Modified header should be automatically set
     */
    public function __construct(\SplFileInfo|string $file, int $status = 200, array $headers = [], bool $public = true, ?string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true)
    {
        parent::__construct(null, $status, $headers);

        $this->setFile($file, $contentDisposition, $autoEtag, $autoLastModified);

        if ($public) {
            $this->setPublic();
        }
    }

    /**
     * Sets the file to stream.
     *
     * @return $this
     *
     * @throws FileException
     */
    public function setFile(\SplFileInfo|string $file, ?string $contentDisposition = null, bool $autoEtag = false, bool $autoLastModified = true): static
    {
        $isTemporaryFile = $file instanceof \SplTempFileObject;
        $this->tempFileObject = $isTemporaryFile ? $file : null;

        if (!$file instanceof File) {
            if ($file instanceof \SplFileInfo) {
                $file = new File($file->getPathname(), !$isTemporaryFile);
            } else {
                $file = new File((string) $file);
            }
        }

        if (!$file->isReadable() && !$isTemporaryFile) {
            throw new FileException('File must be readable.');
        }

        $this->file = $file;

        if ($autoEtag) {
            $this->setAutoEtag();
        }

        if ($autoLastModified && !$isTemporaryFile) {
            $this->setAutoLastModified();
        }

        if ($contentDisposition) {
            $this->setContentDisposition($contentDisposition);
        }

        return $this;
    }

    /**
     * Gets the file.
     */
    public function getFile(): File
    {
        return $this->file;
    }

    /**
     * Sets the response stream chunk size.
     *
     * @return $this
     */
    public function setChunkSize(int $chunkSize): static
    {
        if ($chunkSize < 1 || $chunkSize > \PHP_INT_MAX) {
            throw new \LogicException('The chunk size of a BinaryFileResponse cannot be less than 1 or greater than PHP_INT_MAX.');
        }

        $this->chunkSize = $chunkSize;

        return $this;
    }

    /**
     * Automatically sets the Last-Modified header according the file modification date.
     *
     * @return $this
     */
    public function setAutoLastModified(): static
    {
        $this->setLastModified(\DateTimeImmutable::createFromFormat('U', $this->file->getMTime()));

        return $this;
    }

    /**
     * Automatically sets the ETag header according to the checksum of the file.
     *
     * @return $this
     */
    public function setAutoEtag(): static
    {
        $this->setEtag(base64_encode(hash_file('xxh128', $this->file->getPathname(), true)));

        return $this;
    }

    /**
     * Sets the Content-Disposition header with the given filename.
     *
     * @param string $disposition      ResponseHeaderBag::DISPOSITION_INLINE or ResponseHeaderBag::DISPOSITION_ATTACHMENT
     * @param string $filename         Optionally use this UTF-8 encoded filename instead of the real name of the file
     * @param string $filenameFallback A fallback filename, containing only ASCII characters. Defaults to an automatically encoded filename
     *
     * @return $this
     */
    public function setContentDisposition(string $disposition, string $filename = '', string $filenameFallback = ''): static
    {
        if ('' === $filename) {
            $filename = $this->file->getFilename();
        }

        if ('' === $filenameFallback && (!preg_match('/^[\x20-\x7e]*$/', $filename) || str_contains($filename, '%'))) {
            $encoding = mb_detect_encoding($filename, null, true) ?: '8bit';

            for ($i = 0, $filenameLength = mb_strlen($filename, $encoding); $i < $filenameLength; ++$i) {
                $char = mb_substr($filename, $i, 1, $encoding);

                if ('%' === $char || \ord($char) < 32 || \ord($char) > 126) {
                    $filenameFallback .= '_';
                } else {
                    $filenameFallback .= $char;
                }
            }
        }

        $dispositionHeader = $this->headers->makeDisposition($disposition, $filename, $filenameFallback);
        $this->headers->set('Content-Disposition', $dispositionHeader);

        return $this;
    }

    public function prepare(Request $request): static
    {
        if ($this->isInformational() || $this->isEmpty()) {
            parent::prepare($request);

            $this->maxlen = 0;

            return $this;
        }

        if (!$this->headers->has('Content-Type')) {
            $this->headers->set('Content-Type', $this->file->getMimeType() ?: 'application/octet-stream');
        }

        parent::prepare($request);

        $this->offset = 0;
        $this->maxlen = -1;

        if (false === $fileSize = $this->file->getSize()) {
            return $this;
        }
        $this->headers->remove('Transfer-Encoding');
        $this->headers->set('Content-Length', $fileSize);

        if (!$this->headers->has('Accept-Ranges')) {
            // Only accept ranges on safe HTTP methods
            $this->headers->set('Accept-Ranges', $request->isMethodSafe() ? 'bytes' : 'none');
        }

        if (self::$trustXSendfileTypeHeader && $request->headers->has('X-Sendfile-Type')) {
            // Use X-Sendfile, do not send any content.
            $type = $request->headers->get('X-Sendfile-Type');
            $path = $this->file->getRealPath();
            // Fall back to scheme://path for stream wrapped locations.
            if (false === $path) {
                $path = $this->file->getPathname();
            }
            if ('x-accel-redirect' === strtolower($type)) {
                // Do X-Accel-Mapping substitutions.
                // @link https://www.nginx.com/resources/wiki/start/topics/examples/x-accel/#x-accel-redirect
                $parts = HeaderUtils::split($request->headers->get('X-Accel-Mapping', ''), ',=');
                foreach ($parts as $part) {
                    [$pathPrefix, $location] = $part;
                    if (str_starts_with($path, $pathPrefix)) {
                        $path = $location.substr($path, \strlen($pathPrefix));
                        // Only set X-Accel-Redirect header if a valid URI can be produced
                        // as nginx does not serve arbitrary file paths.
                        $this->headers->set($type, $path);
                        $this->maxlen = 0;
                        break;
                    }
                }
            } else {
                $this->headers->set($type, $path);
                $this->maxlen = 0;
            }
        } elseif ($request->headers->has('Range') && $request->isMethod('GET')) {
            // Process the range headers.
            if (!$request->headers->has('If-Range') || $this->hasValidIfRangeHeader($request->headers->get('If-Range'))) {
                $range = $request->headers->get('Range');

                if (str_starts_with($range, 'bytes=')) {
                    [$start, $end] = explode('-', substr($range, 6), 2) + [1 => 0];

                    $end = ('' === $end) ? $fileSize - 1 : (int) $end;

                    if ('' === $start) {
                        $start = $fileSize - $end;
                        $end = $fileSize - 1;
                    } else {
                        $start = (int) $start;
                    }

                    if ($start <= $end) {
                        $end = min($end, $fileSize - 1);
                        if ($start < 0 || $start > $end) {
                            $this->setStatusCode(416);
                            $this->headers->set('Content-Range', sprintf('bytes */%s', $fileSize));
                        } elseif ($end - $start < $fileSize - 1) {
                            $this->maxlen = $end < $fileSize ? $end - $start + 1 : -1;
                            $this->offset = $start;

                            $this->setStatusCode(206);
                            $this->headers->set('Content-Range', sprintf('bytes %s-%s/%s', $start, $end, $fileSize));
                            $this->headers->set('Content-Length', $end - $start + 1);
                        }
                    }
                }
            }
        }

        if ($request->isMethod('HEAD')) {
            $this->maxlen = 0;
        }

        return $this;
    }

    private function hasValidIfRangeHeader(?string $header): bool
    {
        if ($this->getEtag() === $header) {
            return true;
        }

        if (null === $lastModified = $this->getLastModified()) {
            return false;
        }

        return $lastModified->format('D, d M Y H:i:s').' GMT' === $header;
    }

    public function sendContent(): static
    {
        try {
            if (!$this->isSuccessful()) {
                return $this;
            }

            if (0 === $this->maxlen) {
                return $this;
            }

            $out = fopen('php://output', 'w');

            if ($this->tempFileObject) {
                $file = $this->tempFileObject;
                $file->rewind();
            } else {
                $file = new \SplFileObject($this->file->getPathname(), 'r');
            }

            ignore_user_abort(true);

            if (0 !== $this->offset) {
                $file->fseek($this->offset);
            }

            $length = $this->maxlen;
            while ($length && !$file->eof()) {
                $read = $length > $this->chunkSize || 0 > $length ? $this->chunkSize : $length;

                if (false === $data = $file->fread($read)) {
                    break;
                }
                while ('' !== $data) {
                    $read = fwrite($out, $data);
                    if (false === $read || connection_aborted()) {
                        break 2;
                    }
                    if (0 < $length) {
                        $length -= $read;
                    }
                    $data = substr($data, $read);
                }
            }

            fclose($out);
        } finally {
            if (null === $this->tempFileObject && $this->deleteFileAfterSend && is_file($this->file->getPathname())) {
                unlink($this->file->getPathname());
            }
        }

        return $this;
    }

    /**
     * @throws \LogicException when the content is not null
     */
    public function setContent(?string $content): static
    {
        if (null !== $content) {
            throw new \LogicException('The content cannot be set on a BinaryFileResponse instance.');
        }

        return $this;
    }

    public function getContent(): string|false
    {
        return false;
    }

    /**
     * Trust X-Sendfile-Type header.
     */
    public static function trustXSendfileTypeHeader(): void
    {
        self::$trustXSendfileTypeHeader = true;
    }

    /**
     * If this is set to true, the file will be unlinked after the request is sent
     * Note: If the X-Sendfile header is used, the deleteFileAfterSend setting will not be used.
     *
     * @return $this
     */
    public function deleteFileAfterSend(bool $shouldDelete = true): static
    {
        $this->deleteFileAfterSend = $shouldDelete;

        return $this;
    }
}

.NET Framework

Project Request

ProjectC

Vehicle Maintenance

Movie Navigator

Customers Exchange

ATM

.NET Core

Mail Daemon

Custom

Buns of code

PHP

Mediabox

Loan Castle

Content Management

Laravel

Phone Check

Frontend

Forex Wall

Business projects

Certification Center

Amerikas Auto

Pet projects

Geolocation Assistant

Web Dynamics

Blackball

Good old times

DOS Clock

BrainOut

Airport Administrator

Atomizer

Mediabox