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<?php |
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namespace Helix\Socket; |
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/** |
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* Full duplex connection. |
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*/ |
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class StreamClient extends AbstractClient { |
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/** |
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* **Variadic.** |
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* Creates a pair of interconnected Unix instances that can be used for IPC. |
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* |
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* @link https://php.net/socket_create_pair |
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* |
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* @param array $extra Variadic constructor arguments. |
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* @return static[] Two instances at indices `0` and `1`. |
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* @throws Error |
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*/ |
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public static function newUnixPair (...$extra) { |
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if (!@socket_create_pair(AF_UNIX, SOCK_STREAM, 0, $fd)) { |
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throw new Error; // reliable errno |
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} |
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return [ |
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new static(...array_merge([$fd[0]], $extra)), |
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new static(...array_merge([$fd[1]], $extra)) |
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]; |
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} |
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/** |
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* `SOCK_STREAM` |
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* |
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* @return int |
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*/ |
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final public static function getType () { |
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return SOCK_STREAM; |
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} |
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/** |
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* Reads the specified length in a blocking manner. |
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* May return less than the desired length if the peer shut down writing. |
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* |
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* @see onTimeout() |
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* |
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* @param int $length |
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* @return string |
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* @throws Error The error's extra data is set to what was partially read. |
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*/ |
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public function read ($length) { |
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$data = ''; |
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while ($length > 0) { |
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try { |
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$data .= $chunk = $this->await(self::CH_READ)->recv($length); |
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$length -= strlen($chunk); |
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if ($chunk === '') { |
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return $data; |
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} |
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} |
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catch (Error $error) { |
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$error->setExtra($data); |
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throw $error; |
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} |
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} |
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return $data; |
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} |
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/** |
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* Receives data from the peer. |
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* |
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* @link https://php.net/socket_recv |
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* |
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* @see onTimeout() |
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* |
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* @param int $length Maximum amount of bytes to receive. |
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* @param int $flags `MSG_*` |
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* @throws Error |
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* @return string |
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*/ |
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public function recv ($length, $flags = 0) { |
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$count = @socket_recv($this->resource, $data, $length, $flags); |
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if ($count === false) { |
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$error = new Error($this->resource, SOCKET_EINVAL); |
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if ($error->getCode() === SOCKET_ETIMEDOUT) { |
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$this->onTimeout(); |
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} |
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throw $error; |
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} |
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return (string)$data; // cast needed, will be null if 0 bytes are read. |
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} |
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91
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} |
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hfw /
socket
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