Http.php

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<?php
namespace Magento\Framework\Filesystem\Driver;

use Magento\Framework\Exception\FileSystemException;

class Http extends File
{
    protected $scheme = 'http';

    public function isExists($path)
    {
        $headers = array_change_key_case(get_headers($this->getScheme() . $path, 1), CASE_LOWER);

        $status = $headers[0];

        if (strpos($status, '200 OK') === false) {
            $result = false;
        } else {
            $result = true;
        }

        return $result;
    }

    public function stat($path)
    {
        $headers = array_change_key_case(get_headers($this->getScheme() . $path, 1), CASE_LOWER);

        $result = [
            'dev' => 0,
            'ino' => 0,
            'mode' => 0,
            'nlink' => 0,
            'uid' => 0,
            'gid' => 0,
            'rdev' => 0,
            'atime' => 0,
            'ctime' => 0,
            'blksize' => 0,
            'blocks' => 0,
            'size' => isset($headers['content-length']) ? $headers['content-length'] : 0,
            'type' => isset($headers['content-type']) ? $headers['content-type'] : '',
            'mtime' => isset($headers['last-modified']) ? $headers['last-modified'] : 0,
            'disposition' => isset($headers['content-disposition']) ? $headers['content-disposition'] : null,
        ];
        return $result;
    }

    public function fileGetContents($path, $flags = null, $context = null)
    {
        clearstatcache();
        $result = @file_get_contents($this->getScheme() . $path, $flags, $context);
        if (false === $result) {
            throw new FileSystemException(
                new \Magento\Framework\Phrase(
                    'The contents from the "%1" file can\'t be read. %2',
                    [$path, $this->getWarningMessage()]
                )
            );
        }
        return $result;
    }

    public function filePutContents($path, $content, $mode = null, $context = null)
    {
        $result = @file_put_contents($this->getScheme() . $path, $content, $mode, $context);
        if (!$result) {
            throw new FileSystemException(
                new \Magento\Framework\Phrase(
                    'The specified "%1" file couldn\'t be written. %2',
                    [$path, $this->getWarningMessage()]
                )
            );
        }
        return $result;
    }

    public function fileOpen($path, $mode)
    {
        $urlProp = $this->parseUrl($this->getScheme() . $path);

        if (false === $urlProp) {
            throw new FileSystemException(
                new \Magento\Framework\Phrase('The download URL is incorrect. Verify and try again.')
            );
        }

        $hostname = $urlProp['host'];
        $port = 80;

        if (isset($urlProp['port'])) {
            $port = (int)$urlProp['port'];
        }

        $path = '/';
        if (isset($urlProp['path'])) {
            $path = $urlProp['path'];
        }

        $query = '';
        if (isset($urlProp['query'])) {
            $query = '?' . $urlProp['query'];
        }

        $result = $this->open($hostname, $port);

        $headers = 'GET ' .
            $path .
            $query .
            ' HTTP/1.0' .
            "\r\n" .
            'Host: ' .
            $hostname .
            "\r\n" .
            'User-Agent: Magento' .
            "\r\n" .
            'Connection: close' .
            "\r\n" .
            "\r\n";

        fwrite($result, $headers);

        // trim headers
        while (!feof($result)) {
            $str = fgets($result, 1024);
            if ($str == "\r\n") {
                break;
            }
        }

        return $result;
    }

    public function fileReadLine($resource, $length, $ending = null)
    {
        $result = @stream_get_line($resource, $length, $ending);

        return $result;
    }

    public function getAbsolutePath($basePath, $path, $scheme = null)
    {
        // check if the path given is already an absolute path containing the
        // basepath. so if the basepath starts at position 0 in the path, we
        // must not concatinate them again because path is already absolute.
        if (0 === strpos($path, $basePath)) {
            return $this->getScheme() . $path;
        }

        return $this->getScheme() . $basePath . $path;
    }

    protected function getScheme($scheme = null)
    {
        $scheme = $scheme ?: $this->scheme;
        return $scheme ? $scheme . '://' : '';
    }

    protected function open($hostname, $port)
    {
        $result = @fsockopen($hostname, $port, $errorNumber, $errorMessage);
        if ($result === false) {
            throw new FileSystemException(
                new \Magento\Framework\Phrase(
                    'Something went wrong while connecting to the host. Error#%1 - %2.',
                    [$errorNumber, $errorMessage]
                )
            );
        }
        return $result;
    }

    protected function parseUrl($path)
    {
        return parse_url($path);
    }
}