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<?php |
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namespace Docker\Stream; |
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use Psr\Http\Message\StreamInterface; |
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class DockerRawStream |
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{ |
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const HEADER = 'application/vnd.docker.raw-stream'; |
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/** @var StreamInterface Stream for the response */ |
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protected $stream; |
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/** @var callable[] A list of callable to call when there is a stdin output */ |
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protected $onStdinCallables = []; |
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/** @var callable[] A list of callable to call when there is a stdout output */ |
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protected $onStdoutCallables = []; |
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/** @var callable[] A list of callable to call when there is a stderr output */ |
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protected $onStderrCallables = []; |
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public function __construct(StreamInterface $stream) |
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{ |
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$this->stream = $stream; |
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} |
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/** |
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* Add a callable to read stdin |
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* |
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* @param callable $callback |
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*/ |
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public function onStdin(callable $callback) |
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{ |
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$this->onStdinCallables[] = $callback; |
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} |
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/** |
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* Add a callable to read stdout |
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* |
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* @param callable $callback |
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*/ |
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public function onStdout(callable $callback) |
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{ |
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$this->onStdoutCallables[] = $callback; |
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} |
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/** |
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* Add a callable to read stderr |
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* |
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* @param callable $callback |
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*/ |
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public function onStderr(callable $callback) |
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{ |
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$this->onStderrCallables[] = $callback; |
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} |
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/** |
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* Read a frame in the stream |
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*/ |
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protected function readFrame() |
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{ |
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$header = $this->forceRead(8); |
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if (strlen($header) < 8) { |
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return; |
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} |
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$decoded = unpack('C1type/C3/N1size', $header); |
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$output = $this->forceRead($decoded['size']); |
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$callbackList = []; |
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if ($decoded['type'] == 0) { |
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$callbackList = $this->onStdinCallables; |
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} |
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if ($decoded['type'] == 1) { |
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$callbackList = $this->onStdoutCallables; |
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} |
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if ($decoded['type'] == 2) { |
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$callbackList = $this->onStderrCallables; |
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} |
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foreach ($callbackList as $callback) { |
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$callback($output); |
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} |
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} |
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/** |
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* Force to have something of the expected size (block) |
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* |
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* @param $length |
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* |
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* @return string |
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*/ |
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private function forceRead($length) |
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{ |
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$read = ""; |
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do { |
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$read .= $this->stream->read($length - strlen($read)); |
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} while (strlen($read) < $length && !$this->stream->eof()); |
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return $read; |
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} |
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/** |
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* Wait for stream to finish and call callables if defined |
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*/ |
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public function wait() |
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{ |
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while (!$this->stream->eof()) { |
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$this->readFrame(); |
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} |
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} |
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} |
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stage1 /
docker-php
