Chris@0: <?php
Chris@0: /**
Chris@12:  * @see       https://github.com/zendframework/zend-diactoros for the canonical source repository
Chris@16:  * @copyright Copyright (c) 2015-2018 Zend Technologies USA Inc. (http://www.zend.com)
Chris@0:  * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
Chris@0:  */
Chris@0: 
Chris@0: namespace Zend\Diactoros\Response;
Chris@0: 
Chris@0: use Psr\Http\Message\ResponseInterface;
Chris@12: use RuntimeException;
Chris@0: 
Chris@16: use function ob_get_length;
Chris@16: use function ob_get_level;
Chris@16: use function sprintf;
Chris@16: use function str_replace;
Chris@16: use function ucwords;
Chris@16: 
Chris@16: /**
Chris@16:  * @deprecated since 1.8.0. The package zendframework/zend-httphandlerrunner
Chris@16:  *     now provides this functionality.
Chris@16:  */
Chris@0: trait SapiEmitterTrait
Chris@0: {
Chris@0:     /**
Chris@12:      * Checks to see if content has previously been sent.
Chris@0:      *
Chris@12:      * If either headers have been sent or the output buffer contains content,
Chris@12:      * raises an exception.
Chris@12:      *
Chris@12:      * @throws RuntimeException if headers have already been sent.
Chris@12:      * @throws RuntimeException if output is present in the output buffer.
Chris@0:      */
Chris@12:     private function assertNoPreviousOutput()
Chris@0:     {
Chris@12:         if (headers_sent()) {
Chris@12:             throw new RuntimeException('Unable to emit response; headers already sent');
Chris@0:         }
Chris@0: 
Chris@12:         if (ob_get_level() > 0 && ob_get_length() > 0) {
Chris@12:             throw new RuntimeException('Output has been emitted previously; cannot emit response');
Chris@12:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Emit the status line.
Chris@0:      *
Chris@0:      * Emits the status line using the protocol version and status code from
Chris@0:      * the response; if a reason phrase is available, it, too, is emitted.
Chris@0:      *
Chris@12:      * It is important to mention that this method should be called after
Chris@12:      * `emitHeaders()` in order to prevent PHP from changing the status code of
Chris@12:      * the emitted response.
Chris@12:      *
Chris@0:      * @param ResponseInterface $response
Chris@12:      *
Chris@12:      * @see \Zend\Diactoros\Response\SapiEmitterTrait::emitHeaders()
Chris@0:      */
Chris@0:     private function emitStatusLine(ResponseInterface $response)
Chris@0:     {
Chris@0:         $reasonPhrase = $response->getReasonPhrase();
Chris@12:         $statusCode   = $response->getStatusCode();
Chris@12: 
Chris@0:         header(sprintf(
Chris@0:             'HTTP/%s %d%s',
Chris@0:             $response->getProtocolVersion(),
Chris@12:             $statusCode,
Chris@0:             ($reasonPhrase ? ' ' . $reasonPhrase : '')
Chris@12:         ), true, $statusCode);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Emit response headers.
Chris@0:      *
Chris@0:      * Loops through each header, emitting each; if the header value
Chris@0:      * is an array with multiple values, ensures that each is sent
Chris@0:      * in such a way as to create aggregate headers (instead of replace
Chris@0:      * the previous).
Chris@0:      *
Chris@0:      * @param ResponseInterface $response
Chris@0:      */
Chris@0:     private function emitHeaders(ResponseInterface $response)
Chris@0:     {
Chris@12:         $statusCode = $response->getStatusCode();
Chris@12: 
Chris@0:         foreach ($response->getHeaders() as $header => $values) {
Chris@0:             $name  = $this->filterHeader($header);
Chris@0:             $first = $name === 'Set-Cookie' ? false : true;
Chris@0:             foreach ($values as $value) {
Chris@0:                 header(sprintf(
Chris@0:                     '%s: %s',
Chris@0:                     $name,
Chris@0:                     $value
Chris@12:                 ), $first, $statusCode);
Chris@0:                 $first = false;
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Filter a header name to wordcase
Chris@0:      *
Chris@0:      * @param string $header
Chris@0:      * @return string
Chris@0:      */
Chris@0:     private function filterHeader($header)
Chris@0:     {
Chris@0:         $filtered = str_replace('-', ' ', $header);
Chris@0:         $filtered = ucwords($filtered);
Chris@0:         return str_replace(' ', '-', $filtered);
Chris@0:     }
Chris@0: }