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<?php |
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declare(strict_types=1); |
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namespace Furious\HttpRunner; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\StreamInterface; |
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use function flush; |
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final class StreamRunner implements RunnerInterface |
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{ |
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private Checker $checker; |
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private Emitter $emitter; |
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private int $maxBufferLength; |
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public function __construct(int $maxBufferLength = 8192) |
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{ |
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$this->checker = new Checker(); |
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$this->emitter = new Emitter(); |
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$this->maxBufferLength = $maxBufferLength; |
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} |
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public function run(ResponseInterface $response) : bool |
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{ |
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$this->checker->checkHeadersAlreadySent(); |
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$this->checker->checkOutputAlreadyWrote(); |
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$this->emitter->emitHeaders($response); |
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$this->emitter->emitStatusLine($response); |
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flush(); |
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$range = $this->parseContentRange($response->getHeaderLine('Content-Range')); |
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if (null === $range or 'bytes' !== $range[0]) { |
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$this->emitBody($response); |
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return true; |
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} |
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$this->emitBodyRange($range, $response); |
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return true; |
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} |
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private function emitBody(ResponseInterface $response) : void |
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{ |
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$body = $response->getBody(); |
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if ($body->isSeekable()) { |
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$body->rewind(); |
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} |
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if (!$body->isReadable()) { |
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echo $body; |
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return; |
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} |
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while (!$body->eof()) { |
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echo $body->read($this->maxBufferLength); |
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} |
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} |
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private function emitBodyRange(array $range, ResponseInterface $response): void |
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{ |
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list($unit, $first, $last, $length) = $range; |
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$body = $response->getBody(); |
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$length = $last - $first + 1; |
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if ($body->isSeekable()) { |
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$body->seek($first); |
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$first = 0; |
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} |
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if (!$body->isReadable()) { |
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echo substr($body->getContents(), $first, $length); |
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return; |
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} |
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$remaining = $length; |
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$this->emitBodyRemaining($body, $remaining); |
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} |
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private function emitBodyRemaining(StreamInterface $body, int $remaining): void |
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{ |
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while ($remaining >= $this->maxBufferLength and !$body->eof()) { |
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$contents = $body->read($this->maxBufferLength); |
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$remaining -= strlen($contents); |
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echo $contents; |
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} |
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if ($remaining > 0 and !$body->eof()) { |
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echo $body->read($remaining); |
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} |
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} |
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private function parseContentRange(string $header) : ?array |
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{ |
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if (!preg_match('/(?P<unit>[\w]+)\s+(?P<first>\d+)-(?P<last>\d+)\/(?P<length>\d+|\*)/', $header, $matches)) { |
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return null; |
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} |
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return [ |
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$matches['unit'], |
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(int) $matches['first'], |
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(int) $matches['last'], |
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$matches['length'] === '*' ? '*' : (int) $matches['length'], |
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]; |
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} |
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} |
Furious-PHP /
http-runner
