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drupalcampbristol/vendor/zendframework/zend-diactoros/src/Response/SapiEmitter.php

116 lines
3.4 KiB
PHP

<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @see http://github.com/zendframework/zend-diactoros for the canonical source repository
* @copyright Copyright (c) 2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
*/
namespace Zend\Diactoros\Response;
use Psr\Http\Message\ResponseInterface;
use RuntimeException;
class SapiEmitter implements EmitterInterface
{
/**
* Emits a response for a PHP SAPI environment.
*
* Emits the status line and headers via the header() function, and the
* body content via the output buffer.
*
* @param ResponseInterface $response
* @param null|int $maxBufferLevel Maximum output buffering level to unwrap.
*/
public function emit(ResponseInterface $response, $maxBufferLevel = null)
{
if (headers_sent()) {
throw new RuntimeException('Unable to emit response; headers already sent');
}
$this->emitStatusLine($response);
$this->emitHeaders($response);
$this->emitBody($response, $maxBufferLevel);
}
/**
* Emit the status line.
*
* Emits the status line using the protocol version and status code from
* the response; if a reason phrase is availble, it, too, is emitted.
*
* @param ResponseInterface $response
*/
private function emitStatusLine(ResponseInterface $response)
{
$reasonPhrase = $response->getReasonPhrase();
header(sprintf(
'HTTP/%s %d%s',
$response->getProtocolVersion(),
$response->getStatusCode(),
($reasonPhrase ? ' ' . $reasonPhrase : '')
));
}
/**
* Emit response headers.
*
* Loops through each header, emitting each; if the header value
* is an array with multiple values, ensures that each is sent
* in such a way as to create aggregate headers (instead of replace
* the previous).
*
* @param ResponseInterface $response
*/
private function emitHeaders(ResponseInterface $response)
{
foreach ($response->getHeaders() as $header => $values) {
$name = $this->filterHeader($header);
$first = true;
foreach ($values as $value) {
header(sprintf(
'%s: %s',
$name,
$value
), $first);
$first = false;
}
}
}
/**
* Emit the message body.
*
* Loops through the output buffer, flushing each, before emitting
* the response body using `echo()`.
*
* @param ResponseInterface $response
* @param int $maxBufferLevel Flush up to this buffer level.
*/
private function emitBody(ResponseInterface $response, $maxBufferLevel)
{
if (null === $maxBufferLevel) {
$maxBufferLevel = ob_get_level();
}
while (ob_get_level() > $maxBufferLevel) {
ob_end_flush();
}
echo $response->getBody();
}
/**
* Filter a header name to wordcase
*
* @param string $header
* @return string
*/
private function filterHeader($header)
{
$filtered = str_replace('-', ' ', $header);
$filtered = ucwords($filtered);
return str_replace(' ', '-', $filtered);
}
}