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<?php |
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namespace Pheanstalk\Socket; |
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use Pheanstalk\Exception; |
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use Pheanstalk\Socket; |
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/** |
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* A Socket implementation around a fsockopen() stream. |
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* |
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* @author Paul Annesley |
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* @package Pheanstalk |
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* @license http://www.opensource.org/licenses/mit-license.php |
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*/ |
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class NativeSocket implements Socket |
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{ |
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/** |
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* The default timeout for a blocking read on the socket. |
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*/ |
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const SOCKET_TIMEOUT = 1; |
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/** |
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* Number of retries for attempted writes which return zero length. |
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*/ |
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const WRITE_RETRIES = 8; |
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private $_socket; |
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/** |
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* @param string $host |
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* @param int $port |
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* @param int $connectTimeout |
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* @param bool $connectPersistent |
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*/ |
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public function __construct($host, $port, $connectTimeout, $connectPersistent) |
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{ |
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if ($connectPersistent) { |
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$this->_socket = $this->_wrapper() |
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->pfsockopen($host, $port, $errno, $errstr, $connectTimeout); |
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} else { |
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$this->_socket = $this->_wrapper() |
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->fsockopen($host, $port, $errno, $errstr, $connectTimeout); |
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} |
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if (!$this->_socket) { |
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throw new Exception\ConnectionException($errno, $errstr." (connecting to $host:$port)"); |
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} |
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$this->_wrapper() |
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->stream_set_timeout($this->_socket, self::SOCKET_TIMEOUT); |
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} |
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/* (non-phpdoc) |
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* @see Socket::write() |
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*/ |
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public function write($data) |
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{ |
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$history = new WriteHistory(self::WRITE_RETRIES); |
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for ($written = 0, $fwrite = 0; $written < strlen($data); $written += $fwrite) { |
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$fwrite = $this->_wrapper() |
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->fwrite($this->_socket, substr($data, $written)); |
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$history->log($fwrite); |
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if ($history->isFullWithNoWrites()) { |
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throw new Exception\SocketException(sprintf( |
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'fwrite() failed to write data after %u tries', |
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1 |
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self::WRITE_RETRIES |
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)); |
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} |
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} |
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} |
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/** |
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* Request a socket until the returned datas are a valid xml string |
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* @param null $length |
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* |
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* @return string |
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* @throws Exception\SocketException |
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*/ |
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public function getLine($length = null) |
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{ |
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$timeout = (int) 5; |
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$timer = microtime(true); |
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$data = ''; |
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libxml_use_internal_errors(true); |
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do { |
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libxml_clear_errors(); |
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$data .= isset($length) ? |
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$this->_wrapper()->fgets($this->_socket, $length) : $this->_wrapper()->fgets($this->_socket); |
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simplexml_load_string($data); |
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if (!empty(libxml_get_errors()) && microtime(true) - $timer > $timeout) { |
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$this->disconnect(); |
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throw new Exception\SocketException('Socket timed out!'); |
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} elseif (empty(libxml_get_errors())) { |
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try { |
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$xml = new \SimpleXMLElement($data); |
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} catch (\Exception $e) { |
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$error = (string) (isset($xml['error'])) ? $xml['error'] : 'Socket closed by server!'; |
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throw new Exception\SocketException($error); |
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} |
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} |
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} while (!empty(libxml_get_errors())); |
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libxml_clear_errors(); |
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return rtrim($data); |
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} |
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public function disconnect() |
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{ |
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$this->_wrapper()->fclose($this->_socket); |
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} |
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// ---------------------------------------- |
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/** |
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119
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* Wrapper class for all stream functions. |
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120
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* Facilitates mocking/stubbing stream operations in unit tests. |
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*/ |
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private function _wrapper() |
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{ |
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return StreamFunctions::instance(); |
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} |
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} |
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PyRowMan /
pheanstalk
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