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<?php |
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declare(strict_types=1); |
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namespace Hyphper\Frame; |
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use Hyphper\Frame\Exception\InvalidFrameException; |
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use Hyphper\Frame\Exception\InvalidPaddingException; |
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/** |
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* The PUSH_PROMISE frame is used to notify the peer endpoint in advance of |
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* streams the sender intends to initiate. |
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* |
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* @package Hyphper\Frame |
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*/ |
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class PushPromiseFrame extends \Hyphper\Frame implements PaddingInterface |
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{ |
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use PaddingTrait; |
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protected $defined_flags = [ |
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Flag::END_HEADERS, |
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Flag::PADDED |
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]; |
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protected $type = 0x05; |
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protected $stream_association = self::HAS_STREAM; |
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/** |
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* @var int The stream ID that is promised by this frame. |
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*/ |
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protected $promised_stream_id; |
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protected $data; |
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public function __construct(array $options = []) |
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{ |
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parent::__construct($options); |
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$this->promised_stream_id = (int) ($options['promised_stream_id'] ?? null); |
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$this->data = $options['data'] ?? 0; |
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} |
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public function serializeBody(): string |
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{ |
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$padding_data = $this->serializePaddingData(); |
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$padding = ''; |
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if ($this->padding_length) { |
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$padding = str_repeat("\0", $this->padding_length); |
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} |
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$data = pack('N', $this->promised_stream_id); |
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return $padding_data . $data . $this->data . $padding; |
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} |
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/** |
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* Given the body of a frame, parses it into frame data. This populates |
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* the non-header parts of the frame: that is, it does not populate the |
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* stream ID or flags. |
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* |
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* |
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* @param string $data |
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* @throws InvalidFrameException |
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* @throws InvalidPaddingException |
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* @return void |
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*/ |
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public function parseBody(string $data) |
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{ |
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$padding_data_length = $this->parsePaddingData($data); |
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if (!$unpack = @unpack('Npromised_stream_id', substr($data, $padding_data_length, $padding_data_length + 4))) { |
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throw new InvalidFrameException('Invalid PUSH_PROMISE body'); |
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} |
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$this->promised_stream_id = $unpack['promised_stream_id']; |
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$this->data = substr($data, $padding_data_length + 4); |
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$this->body_len = strlen($data); |
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if ($this->padding_length && $this->padding_length > $this->body_len) { |
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throw new InvalidPaddingException('Padding is too long'); |
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} |
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} |
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/** |
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* @return int |
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*/ |
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public function getPromisedStreamId() |
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{ |
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return $this->promised_stream_id; |
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} |
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/** |
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* @param int $promised_stream_id |
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* @return $this |
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*/ |
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public function setPromisedStreamId(int $promised_stream_id) |
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{ |
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$this->promised_stream_id = $promised_stream_id; |
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return $this; |
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} |
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/** |
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* @return int|mixed |
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*/ |
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public function getData() |
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{ |
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return $this->data; |
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} |
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/** |
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* @param string $data |
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* @return $this |
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*/ |
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public function setData(string $data) |
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{ |
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$this->data = $data; |
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return $this; |
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} |
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} |
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hyphper /
h2-frame
