determineContentType($request);
switch ($contentType) {
case 'application/json':
$output = $this->renderJsonNotFoundOutput($request, $response);
break;
case 'text/xml':
case 'application/xml':
$output = $this->renderXmlNotFoundOutput($request, $response);
break;
case 'text/html':
$output = $this->renderHtmlNotFoundOutput($request, $response);
}
$body = new Body(fopen('php://temp', 'r+'));
$body->write($output);
return $response->withStatus(404)
->withHeader('Content-Type', $contentType)
->withBody($body);
}
/**
* Determine which content type we know about is wanted using Accept header
*
* @param ServerRequestInterface $request
* @return string
*/
private function determineContentType(ServerRequestInterface $request)
{
$acceptHeader = $request->getHeaderLine('Accept');
$selectedContentTypes = array_intersect(explode(',', $acceptHeader), $this->knownContentTypes);
if (count($selectedContentTypes)) {
return $selectedContentTypes[0];
}
return 'text/html';
}
/**
* Return a response for application/json content not found
*
* @param ServerRequestInterface $request The most recent Request object
* @param ResponseInterface $response The most recent Response object
*
* @return ResponseInterface
*/
protected function renderJsonNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
{
return '{"message":"Not found"}';
}
/**
* Return a response for xml content not found
*
* @param ServerRequestInterface $request The most recent Request object
* @param ResponseInterface $response The most recent Response object
*
* @return ResponseInterface
*/
protected function renderXmlNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
{
return 'Not found';
}
/**
* Return a response for text/html content not found
*
* @param ServerRequestInterface $request The most recent Request object
* @param ResponseInterface $response The most recent Response object
*
* @return ResponseInterface
*/
protected function renderHtmlNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
{
$homeUrl = (string)($request->getUri()->withPath('')->withQuery('')->withFragment(''));
return <<
Page Not Found
Page Not Found
The page you are looking for could not be found. Check the address bar
to ensure your URL is spelled correctly. If all else fails, you can
visit our home page at the link below.
Visit the Home Page