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Edit File : PermessageDeflateOptions.php \| Size : 8.09 KB
<?php namespace Ratchet\RFC6455\Handshake; use Psr\Http\Message\MessageInterface; use Psr\Http\Message\RequestInterface; use Psr\Http\Message\ResponseInterface; final class PermessageDeflateOptions { const MAX_WINDOW_BITS = 15; /* this is a private instead of const for 5.4 compatibility / private static $VALID_BITS = ['8', '9', '10', '11', '12', '13', '14', '15']; private $deflateEnabled = false; private $server_no_context_takeover; private $client_no_context_takeover; private $server_max_window_bits; private $client_max_window_bits; private function __construct() { } public static function createEnabled() { $new = new static(); $new->deflateEnabled = true; $new->client_max_window_bits = self::MAX_WINDOW_BITS; $new->client_no_context_takeover = false; $new->server_max_window_bits = self::MAX_WINDOW_BITS; $new->server_no_context_takeover = false; return $new; } public static function createDisabled() { return new static(); } public function withClientNoContextTakeover() { $new = clone $this; $new->client_no_context_takeover = true; } public function withoutClientNoContextTakeover() { $new = clone $this; $new->client_no_context_takeover = false; } public function withServerNoContextTakeover() { $new = clone $this; $new->server_no_context_takeover = true; } public function withoutServerNoContextTakeover() { $new = clone $this; $new->server_no_context_takeover = false; } public function withServerMaxWindowBits($bits = self::MAX_WINDOW_BITS) { if (!in_array($bits, self::$VALID_BITS)) { throw new \Exception('server_max_window_bits must have a value between 8 and 15.'); } $new = clone $this; $new->server_max_window_bits = $bits; } public function withClientMaxWindowBits($bits = self::MAX_WINDOW_BITS) { if (!in_array($bits, self::$VALID_BITS)) { throw new \Exception('client_max_window_bits must have a value between 8 and 15.'); } $new = clone $this; $new->client_max_window_bits = $bits; } /* * https://tools.ietf.org/html/rfc6455#section-9.1 * https://tools.ietf.org/html/rfc7692#section-7 * * @param MessageInterface $requestOrResponse * @return PermessageDeflateOptions[] * @throws \Exception / public static function fromRequestOrResponse(MessageInterface $requestOrResponse) { $optionSets = []; $extHeader = preg_replace('/\s+/', '', join(', ', $requestOrResponse->getHeader('Sec-Websocket-Extensions'))); $configurationRequests = explode(',', $extHeader); foreach ($configurationRequests as $configurationRequest) { $parts = explode(';', $configurationRequest); if (count($parts) == 0) { continue; } if ($parts[0] !== 'permessage-deflate') { continue; } array_shift($parts); $options = new static(); $options->deflateEnabled = true; foreach ($parts as $part) { $kv = explode('=', $part); $key = $kv[0]; $value = count($kv) > 1 ? $kv[1] : null; switch ($key) { case "server_no_context_takeover": case "client_no_context_takeover": if ($value !== null) { throw new InvalidPermessageDeflateOptionsException($key . ' must not have a value.'); } $value = true; break; case "server_max_window_bits": if (!in_array($value, self::$VALID_BITS)) { throw new InvalidPermessageDeflateOptionsException($key . ' must have a value between 8 and 15.'); } break; case "client_max_window_bits": if ($value === null) { $value = '15'; } if (!in_array($value, self::$VALID_BITS)) { throw new InvalidPermessageDeflateOptionsException($key . ' must have no value or a value between 8 and 15.'); } break; default: throw new InvalidPermessageDeflateOptionsException('Option "' . $key . '"is not valid for permessage deflate'); } if ($options->$key !== null) { throw new InvalidPermessageDeflateOptionsException($key . ' specified more than once. Connection must be declined.'); } $options->$key = $value; } if ($options->getClientMaxWindowBits() === null) { $options->client_max_window_bits = 15; } if ($options->getServerMaxWindowBits() === null) { $options->server_max_window_bits = 15; } $optionSets[] = $options; } // always put a disabled on the end $optionSets[] = new static(); return $optionSets; } /* * @return mixed / public function getServerNoContextTakeover() { return $this->server_no_context_takeover; } /* * @return mixed / public function getClientNoContextTakeover() { return $this->client_no_context_takeover; } /* * @return mixed / public function getServerMaxWindowBits() { return $this->server_max_window_bits; } /* * @return mixed / public function getClientMaxWindowBits() { return $this->client_max_window_bits; } /* * @return bool / public function isEnabled() { return $this->deflateEnabled; } /* * @param ResponseInterface $response * @return ResponseInterface */ public function addHeaderToResponse(ResponseInterface $response) { if (!$this->deflateEnabled) { return $response; } $header = 'permessage-deflate'; if ($this->client_max_window_bits != 15) { $header .= '; client_max_window_bits='. $this->client_max_window_bits; } if ($this->client_no_context_takeover) { $header .= '; client_no_context_takeover'; } if ($this->server_max_window_bits != 15) { $header .= '; server_max_window_bits=' . $this->server_max_window_bits; } if ($this->server_no_context_takeover) { $header .= '; server_no_context_takeover'; } return $response->withAddedHeader('Sec-Websocket-Extensions', $header); } public function addHeaderToRequest(RequestInterface $request) { if (!$this->deflateEnabled) { return $request; } $header = 'permessage-deflate'; if ($this->server_no_context_takeover) { $header .= '; server_no_context_takeover'; } if ($this->client_no_context_takeover) { $header .= '; client_no_context_takeover'; } if ($this->server_max_window_bits != 15) { $header .= '; server_max_window_bits=' . $this->server_max_window_bits; } $header .= '; client_max_window_bits'; if ($this->client_max_window_bits != 15) { $header .= '='. $this->client_max_window_bits; } return $request->withAddedHeader('Sec-Websocket-Extensions', $header); } public static function permessageDeflateSupported($version = PHP_VERSION) { if (!function_exists('deflate_init')) { return false; } if (version_compare($version, '7.1.3', '>')) { return true; } if (version_compare($version, '7.0.18', '>=') && version_compare($version, '7.1.0', '<')) { return true; } return false; } } Back

Edit File : PermessageDeflateOptions.php | Size : 8.09 KB

<?php

namespace Ratchet\RFC6455\Handshake;

use Psr\Http\Message\MessageInterface;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

final class PermessageDeflateOptions
{
    const MAX_WINDOW_BITS = 15;
    /* this is a private instead of const for 5.4 compatibility */
    private static $VALID_BITS = ['8', '9', '10', '11', '12', '13', '14', '15'];

private $deflateEnabled = false;

private $server_no_context_takeover;
    private $client_no_context_takeover;
    private $server_max_window_bits;
    private $client_max_window_bits;

private function __construct() { }

public static function createEnabled() {
        $new                             = new static();
        $new->deflateEnabled             = true;
        $new->client_max_window_bits     = self::MAX_WINDOW_BITS;
        $new->client_no_context_takeover = false;
        $new->server_max_window_bits     = self::MAX_WINDOW_BITS;
        $new->server_no_context_takeover = false;

return $new;
    }

public static function createDisabled() {
        return new static();
    }

public function withClientNoContextTakeover() {
        $new = clone $this;
        $new->client_no_context_takeover = true;
    }

public function withoutClientNoContextTakeover() {
        $new = clone $this;
        $new->client_no_context_takeover = false;
    }

public function withServerNoContextTakeover() {
        $new = clone $this;
        $new->server_no_context_takeover = true;
    }

public function withoutServerNoContextTakeover() {
        $new = clone $this;
        $new->server_no_context_takeover = false;
    }

public function withServerMaxWindowBits($bits = self::MAX_WINDOW_BITS) {
        if (!in_array($bits, self::$VALID_BITS)) {
            throw new \Exception('server_max_window_bits must have a value between 8 and 15.');
        }
        $new = clone $this;
        $new->server_max_window_bits = $bits;
    }

public function withClientMaxWindowBits($bits = self::MAX_WINDOW_BITS) {
        if (!in_array($bits, self::$VALID_BITS)) {
            throw new \Exception('client_max_window_bits must have a value between 8 and 15.');
        }
        $new = clone $this;
        $new->client_max_window_bits = $bits;
    }

/**
     * https://tools.ietf.org/html/rfc6455#section-9.1
     * https://tools.ietf.org/html/rfc7692#section-7
     *
     * @param MessageInterface $requestOrResponse
     * @return PermessageDeflateOptions[]
     * @throws \Exception
     */
    public static function fromRequestOrResponse(MessageInterface $requestOrResponse) {
        $optionSets = [];

$extHeader = preg_replace('/\s+/', '', join(', ', $requestOrResponse->getHeader('Sec-Websocket-Extensions')));

$configurationRequests = explode(',', $extHeader);
        foreach ($configurationRequests as $configurationRequest) {
            $parts = explode(';', $configurationRequest);
            if (count($parts) == 0) {
                continue;
            }

if ($parts[0] !== 'permessage-deflate') {
                continue;
            }

array_shift($parts);
            $options                 = new static();
            $options->deflateEnabled = true;
            foreach ($parts as $part) {
                $kv = explode('=', $part);
                $key = $kv[0];
                $value = count($kv) > 1 ? $kv[1] : null;

switch ($key) {
                    case "server_no_context_takeover":
                    case "client_no_context_takeover":
                        if ($value !== null) {
                            throw new InvalidPermessageDeflateOptionsException($key . ' must not have a value.');
                        }
                        $value = true;
                        break;
                    case "server_max_window_bits":
                        if (!in_array($value, self::$VALID_BITS)) {
                            throw new InvalidPermessageDeflateOptionsException($key . ' must have a value between 8 and 15.');
                        }
                        break;
                    case "client_max_window_bits":
                        if ($value === null) {
                            $value = '15';
                        }
                        if (!in_array($value, self::$VALID_BITS)) {
                            throw new InvalidPermessageDeflateOptionsException($key . ' must have no value or a value between 8 and 15.');
                        }
                        break;
                    default:
                        throw new InvalidPermessageDeflateOptionsException('Option "' . $key . '"is not valid for permessage deflate');
                }

if ($options->$key !== null) {
                    throw new InvalidPermessageDeflateOptionsException($key . ' specified more than once. Connection must be declined.');
                }

$options->$key = $value;
            }

if ($options->getClientMaxWindowBits() === null) {
                $options->client_max_window_bits = 15;
            }

if ($options->getServerMaxWindowBits() === null) {
                $options->server_max_window_bits = 15;
            }

$optionSets[] = $options;
        }

// always put a disabled on the end
        $optionSets[] = new static();

return $optionSets;
    }

/**
     * @return mixed
     */
    public function getServerNoContextTakeover()
    {
        return $this->server_no_context_takeover;
    }

/**
     * @return mixed
     */
    public function getClientNoContextTakeover()
    {
        return $this->client_no_context_takeover;
    }

/**
     * @return mixed
     */
    public function getServerMaxWindowBits()
    {
        return $this->server_max_window_bits;
    }

/**
     * @return mixed
     */
    public function getClientMaxWindowBits()
    {
        return $this->client_max_window_bits;
    }

/**
     * @return bool
     */
    public function isEnabled()
    {
        return $this->deflateEnabled;
    }

/**
     * @param ResponseInterface $response
     * @return ResponseInterface
     */
    public function addHeaderToResponse(ResponseInterface $response)
    {
        if (!$this->deflateEnabled) {
            return $response;
        }

$header = 'permessage-deflate';
        if ($this->client_max_window_bits != 15) {
            $header .= '; client_max_window_bits='. $this->client_max_window_bits;
        }
        if ($this->client_no_context_takeover) {
            $header .= '; client_no_context_takeover';
        }
        if ($this->server_max_window_bits != 15) {
            $header .= '; server_max_window_bits=' . $this->server_max_window_bits;
        }
        if ($this->server_no_context_takeover) {
            $header .= '; server_no_context_takeover';
        }

return $response->withAddedHeader('Sec-Websocket-Extensions', $header);
    }

public function addHeaderToRequest(RequestInterface $request) {
        if (!$this->deflateEnabled) {
            return $request;
        }

$header = 'permessage-deflate';
        if ($this->server_no_context_takeover) {
            $header .= '; server_no_context_takeover';
        }
        if ($this->client_no_context_takeover) {
            $header .= '; client_no_context_takeover';
        }
        if ($this->server_max_window_bits != 15) {
            $header .= '; server_max_window_bits=' . $this->server_max_window_bits;
        }
        $header .= '; client_max_window_bits';
        if ($this->client_max_window_bits != 15) {
            $header .= '='. $this->client_max_window_bits;
        }

return $request->withAddedHeader('Sec-Websocket-Extensions', $header);
    }

public static function permessageDeflateSupported($version = PHP_VERSION) {
        if (!function_exists('deflate_init')) {
            return false;
        }
        if (version_compare($version, '7.1.3', '>')) {
            return true;
        }
        if (version_compare($version, '7.0.18', '>=')
            && version_compare($version, '7.1.0', '<')) {
            return true;
        }

return false;
    }
}

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