class RequestFormatRouteFilter
Same name in other branches
- 9 core/lib/Drupal/Core/Routing/RequestFormatRouteFilter.php \Drupal\Core\Routing\RequestFormatRouteFilter
- 8.9.x core/lib/Drupal/Core/Routing/RequestFormatRouteFilter.php \Drupal\Core\Routing\RequestFormatRouteFilter
- 11.x core/lib/Drupal/Core/Routing/RequestFormatRouteFilter.php \Drupal\Core\Routing\RequestFormatRouteFilter
Provides a route filter, which filters by the request format.
Hierarchy
- class \Drupal\Core\Routing\RequestFormatRouteFilter implements \Drupal\Core\Routing\FilterInterface
Expanded class hierarchy of RequestFormatRouteFilter
2 files declare their use of RequestFormatRouteFilter
- EarlyFormatSetter.php in core/
modules/ jsonapi/ src/ Routing/ EarlyFormatSetter.php - RequestFormatRouteFilterTest.php in core/
tests/ Drupal/ Tests/ Core/ Routing/ RequestFormatRouteFilterTest.php
1 string reference to 'RequestFormatRouteFilter'
- core.services.yml in core/
core.services.yml - core/core.services.yml
1 service uses RequestFormatRouteFilter
File
-
core/
lib/ Drupal/ Core/ Routing/ RequestFormatRouteFilter.php, line 14
Namespace
Drupal\Core\RoutingView source
class RequestFormatRouteFilter implements FilterInterface {
/**
* {@inheritdoc}
*/
public function filter(RouteCollection $collection, Request $request) {
// Determine the request format.
$default_format = static::getDefaultFormat($collection);
// If the request does not specify a format then use the default.
if (is_null($request->getRequestFormat(NULL))) {
$format = $default_format;
$request->setRequestFormat($default_format);
}
else {
$format = $request->getRequestFormat($default_format);
}
$routes_with_requirement = [];
$routes_without_requirement = [];
$result_collection = new RouteCollection();
/** @var \Symfony\Component\Routing\Route $route */
foreach ($collection as $name => $route) {
if (!$route->hasRequirement('_format')) {
$routes_without_requirement[$name] = $route;
continue;
}
else {
$routes_with_requirement[$name] = $route;
}
}
foreach ($routes_with_requirement as $name => $route) {
// If the route has no _format specification, we move it to the end. If it
// does, then no match means the route is removed entirely.
if (($supported_formats = array_filter(explode('|', $route->getRequirement('_format')))) && in_array($format, $supported_formats, TRUE)) {
$result_collection->add($name, $route);
}
}
foreach ($routes_without_requirement as $name => $route) {
$result_collection->add($name, $route);
}
if (count($result_collection)) {
return $result_collection;
}
// We do not throw a
// \Symfony\Component\Routing\Exception\ResourceNotFoundException here
// because we don't want to return a 404 status code, but rather a 406.
$available_formats = static::getAvailableFormats($collection);
$not_acceptable = new NotAcceptableHttpException("No route found for the specified format {$format}. Supported formats: " . implode(', ', $available_formats) . '.');
if ($available_formats) {
$links = [];
foreach ($available_formats as $available_format) {
$url = Url::fromUri($request->getUri(), [
'query' => [
'_format' => $available_format,
],
])
->toString(TRUE)
->getGeneratedUrl();
$content_type = $request->getMimeType($available_format);
$links[] = "<{$url}>; rel=\"alternate\"; type=\"{$content_type}\"";
}
$not_acceptable->setHeaders([
'Link' => implode(', ', $links),
]);
}
throw $not_acceptable;
}
/**
* Determines the default request format.
*
* By default, use 'html' as the default format. But when there's only a
* single route match, and that route specifies a '_format' requirement
* listing a single format, then use that as the default format. Also, if
* there are multiple routes which all require the same single format then
* use it.
*
* @param \Symfony\Component\Routing\RouteCollection $collection
* The route collection to filter.
*
* @return string
* The default format.
*/
protected static function getDefaultFormat(RouteCollection $collection) {
$formats = static::getAvailableFormats($collection);
// The default format is 'html' unless ALL routes require the same format.
return count($formats) === 1 ? reset($formats) : 'html';
}
/**
* Gets the set of formats across all routes in the collection.
*
* @param \Symfony\Component\Routing\RouteCollection $collection
* The route collection to filter.
*
* @return string[]
* All available formats.
*/
protected static function getAvailableFormats(RouteCollection $collection) {
$all_formats = array_reduce($collection->all(), function (array $carry, Route $route) {
// Routes without a '_format' requirement are assumed to require HTML.
$route_formats = !$route->hasRequirement('_format') ? [
'html',
] : explode('|', $route->getRequirement('_format'));
return array_merge($carry, $route_formats);
}, []);
return array_unique(array_filter($all_formats));
}
}
Members
Title Sort descending | Modifiers | Object type | Summary | Overriden Title | Overrides |
---|---|---|---|---|---|
RequestFormatRouteFilter::filter | public | function | Filters the route collection against a request. | Overrides FilterInterface::filter | 1 |
RequestFormatRouteFilter::getAvailableFormats | protected static | function | Gets the set of formats across all routes in the collection. | ||
RequestFormatRouteFilter::getDefaultFormat | protected static | function | Determines the default request format. |
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