UrlGenerator.php
TLDR
The UrlGenerator.php file is a part of the Illuminate Routing component in the Laravel framework. It provides methods to generate URLs for routes and assets in an application. The class includes methods for generating absolute and secure URLs, as well as URLs for assets. It also has methods for creating signed routes and checking if a request has a valid signature.
Methods
full()
This method returns the full URL of the current request.
current()
This method returns the current URL of the request.
previous($fallback = false)
This method returns the URL of the previous request. If a fallback value is provided and the previous URL is not available, the fallback value is returned.
previousPath($fallback = false)
This method returns the path of the previous request. If a fallback value is provided and the previous path is not available, the fallback value is returned.
to($path, $extra = [], $secure = null)
This method generates an absolute URL for the given path. It accepts an optional array of extra parameters and a boolean value to determine if the URL should be secure.
secure($path, $parameters = [])
This method generates a secure, absolute URL to the given path. It accepts an optional array of parameters.
asset($path, $secure = null)
This method generates the URL to an application asset. It accepts an optional boolean value to determine if the URL should be secure.
secureAsset($path)
This method generates the URL to a secure asset.
assetFrom($root, $path, $secure = null)
This method generates the URL to an asset from a custom root domain.
signedRoute($name, $parameters = [], $expiration = null, $absolute = true)
This method creates a signed route URL for a named route. It accepts optional parameters and expiration time.
temporarySignedRoute($name, $expiration, $parameters = [], $absolute = true)
This method creates a temporary signed route URL for a named route. It accepts parameters and an expiration time.
hasValidSignature($request, $absolute = true, $ignoreQuery = [])
This method determines if the given request has a valid signature. It accepts a request object, an optional boolean value to determine if the URL is absolute, and an array of query parameters to ignore.
hasValidRelativeSignature($request, $ignoreQuery = [])
This method determines if the given request has a valid signature for a relative URL.
hasCorrectSignature($request, $absolute = true, $ignoreQuery = [])
This method determines if the signature from the given request matches the URL.
signatureHasNotExpired($request)
This method determines if the expires timestamp from the given request has not passed.
route($name, $parameters = [], $absolute = true)
This method gets the URL to a named route. It throws a RouteNotFoundException if the route is not defined.
toRoute($route, $parameters, $absolute)
This method gets the URL for a given route instance.
action($action, $parameters = [], $absolute = true)
This method gets the URL to a controller action. It throws an InvalidArgumentException if the action is not defined.
formatParameters($parameters)
This method formats the array of URL parameters.
isValidUrl($path)
This method determines if the given path is a valid URL.
Classes
UrlGenerator
This class is responsible for generating URLs for routes and assets in an application. It implements the UrlGeneratorContract interface.
<?php
namespace Illuminate\Routing;
use BackedEnum;
use Closure;
use Illuminate\Contracts\Routing\UrlGenerator as UrlGeneratorContract;
use Illuminate\Contracts\Routing\UrlRoutable;
use Illuminate\Http\Request;
use Illuminate\Support\Arr;
use Illuminate\Support\Carbon;
use Illuminate\Support\InteractsWithTime;
use Illuminate\Support\Str;
use Illuminate\Support\Traits\Macroable;
use InvalidArgumentException;
use Symfony\Component\Routing\Exception\RouteNotFoundException;
class UrlGenerator implements UrlGeneratorContract
{
use InteractsWithTime, Macroable;
/**
* The route collection.
*
* @var \Illuminate\Routing\RouteCollectionInterface
*/
protected $routes;
/**
* The request instance.
*
* @var \Illuminate\Http\Request
*/
protected $request;
/**
* The asset root URL.
*
* @var string
*/
protected $assetRoot;
/**
* The forced URL root.
*
* @var string
*/
protected $forcedRoot;
/**
* The forced scheme for URLs.
*
* @var string
*/
protected $forceScheme;
/**
* A cached copy of the URL root for the current request.
*
* @var string|null
*/
protected $cachedRoot;
/**
* A cached copy of the URL scheme for the current request.
*
* @var string|null
*/
protected $cachedScheme;
/**
* The root namespace being applied to controller actions.
*
* @var string
*/
protected $rootNamespace;
/**
* The session resolver callable.
*
* @var callable
*/
protected $sessionResolver;
/**
* The encryption key resolver callable.
*
* @var callable
*/
protected $keyResolver;
/**
* The missing named route resolver callable.
*
* @var callable
*/
protected $missingNamedRouteResolver;
/**
* The callback to use to format hosts.
*
* @var \Closure
*/
protected $formatHostUsing;
/**
* The callback to use to format paths.
*
* @var \Closure
*/
protected $formatPathUsing;
/**
* The route URL generator instance.
*
* @var \Illuminate\Routing\RouteUrlGenerator|null
*/
protected $routeGenerator;
/**
* Create a new URL Generator instance.
*
* @param \Illuminate\Routing\RouteCollectionInterface $routes
* @param \Illuminate\Http\Request $request
* @param string|null $assetRoot
* @return void
*/
public function __construct(RouteCollectionInterface $routes, Request $request, $assetRoot = null)
{
$this->routes = $routes;
$this->assetRoot = $assetRoot;
$this->setRequest($request);
}
/**
* Get the full URL for the current request.
*
* @return string
*/
public function full()
{
return $this->request->fullUrl();
}
/**
* Get the current URL for the request.
*
* @return string
*/
public function current()
{
return $this->to($this->request->getPathInfo());
}
/**
* Get the URL for the previous request.
*
* @param mixed $fallback
* @return string
*/
public function previous($fallback = false)
{
$referrer = $this->request->headers->get('referer');
$url = $referrer ? $this->to($referrer) : $this->getPreviousUrlFromSession();
if ($url) {
return $url;
} elseif ($fallback) {
return $this->to($fallback);
}
return $this->to('/');
}
/**
* Get the previous path info for the request.
*
* @param mixed $fallback
* @return string
*/
public function previousPath($fallback = false)
{
$previousPath = str_replace($this->to('/'), '', rtrim(preg_replace('/\?.*/', '', $this->previous($fallback)), '/'));
return $previousPath === '' ? '/' : $previousPath;
}
/**
* Get the previous URL from the session if possible.
*
* @return string|null
*/
protected function getPreviousUrlFromSession()
{
$session = $this->getSession();
return $session ? $session->previousUrl() : null;
}
/**
* Generate an absolute URL to the given path.
*
* @param string $path
* @param mixed $extra
* @param bool|null $secure
* @return string
*/
public function to($path, $extra = [], $secure = null)
{
// First we will check if the URL is already a valid URL. If it is we will not
// try to generate a new one but will simply return the URL as is, which is
// convenient since developers do not always have to check if it's valid.
if ($this->isValidUrl($path)) {
return $path;
}
$tail = implode('/', array_map(
'rawurlencode', (array) $this->formatParameters($extra))
);
// Once we have the scheme we will compile the "tail" by collapsing the values
// into a single string delimited by slashes. This just makes it convenient
// for passing the array of parameters to this URL as a list of segments.
$root = $this->formatRoot($this->formatScheme($secure));
[$path, $query] = $this->extractQueryString($path);
return $this->format(
$root, '/'.trim($path.'/'.$tail, '/')
).$query;
}
/**
* Generate a secure, absolute URL to the given path.
*
* @param string $path
* @param array $parameters
* @return string
*/
public function secure($path, $parameters = [])
{
return $this->to($path, $parameters, true);
}
/**
* Generate the URL to an application asset.
*
* @param string $path
* @param bool|null $secure
* @return string
*/
public function asset($path, $secure = null)
{
if ($this->isValidUrl($path)) {
return $path;
}
// Once we get the root URL, we will check to see if it contains an index.php
// file in the paths. If it does, we will remove it since it is not needed
// for asset paths, but only for routes to endpoints in the application.
$root = $this->assetRoot ?: $this->formatRoot($this->formatScheme($secure));
return Str::finish($this->removeIndex($root), '/').trim($path, '/');
}
/**
* Generate the URL to a secure asset.
*
* @param string $path
* @return string
*/
public function secureAsset($path)
{
return $this->asset($path, true);
}
/**
* Generate the URL to an asset from a custom root domain such as CDN, etc.
*
* @param string $root
* @param string $path
* @param bool|null $secure
* @return string
*/
public function assetFrom($root, $path, $secure = null)
{
// Once we get the root URL, we will check to see if it contains an index.php
// file in the paths. If it does, we will remove it since it is not needed
// for asset paths, but only for routes to endpoints in the application.
$root = $this->formatRoot($this->formatScheme($secure), $root);
return $this->removeIndex($root).'/'.trim($path, '/');
}
/**
* Remove the index.php file from a path.
*
* @param string $root
* @return string
*/
protected function removeIndex($root)
{
$i = 'index.php';
return str_contains($root, $i) ? str_replace('/'.$i, '', $root) : $root;
}
/**
* Get the default scheme for a raw URL.
*
* @param bool|null $secure
* @return string
*/
public function formatScheme($secure = null)
{
if (! is_null($secure)) {
return $secure ? 'https://' : 'http://';
}
if (is_null($this->cachedScheme)) {
$this->cachedScheme = $this->forceScheme ?: $this->request->getScheme().'://';
}
return $this->cachedScheme;
}
/**
* Create a signed route URL for a named route.
*
* @param string $name
* @param mixed $parameters
* @param \DateTimeInterface|\DateInterval|int|null $expiration
* @param bool $absolute
* @return string
*
* @throws \InvalidArgumentException
*/
public function signedRoute($name, $parameters = [], $expiration = null, $absolute = true)
{
$this->ensureSignedRouteParametersAreNotReserved(
$parameters = Arr::wrap($parameters)
);
if ($expiration) {
$parameters = $parameters + ['expires' => $this->availableAt($expiration)];
}
ksort($parameters);
$key = call_user_func($this->keyResolver);
return $this->route($name, $parameters + [
'signature' => hash_hmac('sha256', $this->route($name, $parameters, $absolute), $key),
], $absolute);
}
/**
* Ensure the given signed route parameters are not reserved.
*
* @param mixed $parameters
* @return void
*/
protected function ensureSignedRouteParametersAreNotReserved($parameters)
{
if (array_key_exists('signature', $parameters)) {
throw new InvalidArgumentException(
'"Signature" is a reserved parameter when generating signed routes. Please rename your route parameter.'
);
}
if (array_key_exists('expires', $parameters)) {
throw new InvalidArgumentException(
'"Expires" is a reserved parameter when generating signed routes. Please rename your route parameter.'
);
}
}
/**
* Create a temporary signed route URL for a named route.
*
* @param string $name
* @param \DateTimeInterface|\DateInterval|int $expiration
* @param array $parameters
* @param bool $absolute
* @return string
*/
public function temporarySignedRoute($name, $expiration, $parameters = [], $absolute = true)
{
return $this->signedRoute($name, $parameters, $expiration, $absolute);
}
/**
* Determine if the given request has a valid signature.
*
* @param \Illuminate\Http\Request $request
* @param bool $absolute
* @param array $ignoreQuery
* @return bool
*/
public function hasValidSignature(Request $request, $absolute = true, array $ignoreQuery = [])
{
return $this->hasCorrectSignature($request, $absolute, $ignoreQuery)
&& $this->signatureHasNotExpired($request);
}
/**
* Determine if the given request has a valid signature for a relative URL.
*
* @param \Illuminate\Http\Request $request
* @param array $ignoreQuery
* @return bool
*/
public function hasValidRelativeSignature(Request $request, array $ignoreQuery = [])
{
return $this->hasValidSignature($request, false, $ignoreQuery);
}
/**
* Determine if the signature from the given request matches the URL.
*
* @param \Illuminate\Http\Request $request
* @param bool $absolute
* @param array $ignoreQuery
* @return bool
*/
public function hasCorrectSignature(Request $request, $absolute = true, array $ignoreQuery = [])
{
$ignoreQuery[] = 'signature';
$url = $absolute ? $request->url() : '/'.$request->path();
$queryString = collect(explode('&', (string) $request->server->get('QUERY_STRING')))
->reject(fn ($parameter) => in_array(Str::before($parameter, '='), $ignoreQuery))
->join('&');
$original = rtrim($url.'?'.$queryString, '?');
$signature = hash_hmac('sha256', $original, call_user_func($this->keyResolver));
return hash_equals($signature, (string) $request->query('signature', ''));
}
/**
* Determine if the expires timestamp from the given request is not from the past.
*
* @param \Illuminate\Http\Request $request
* @return bool
*/
public function signatureHasNotExpired(Request $request)
{
$expires = $request->query('expires');
return ! ($expires && Carbon::now()->getTimestamp() > $expires);
}
/**
* Get the URL to a named route.
*
* @param string $name
* @param mixed $parameters
* @param bool $absolute
* @return string
*
* @throws \Symfony\Component\Routing\Exception\RouteNotFoundException
*/
public function route($name, $parameters = [], $absolute = true)
{
if (! is_null($route = $this->routes->getByName($name))) {
return $this->toRoute($route, $parameters, $absolute);
}
if (! is_null($this->missingNamedRouteResolver) &&
! is_null($url = call_user_func($this->missingNamedRouteResolver, $name, $parameters, $absolute))) {
return $url;
}
throw new RouteNotFoundException("Route [{$name}] not defined.");
}
/**
* Get the URL for a given route instance.
*
* @param \Illuminate\Routing\Route $route
* @param mixed $parameters
* @param bool $absolute
* @return string
*
* @throws \Illuminate\Routing\Exceptions\UrlGenerationException
*/
public function toRoute($route, $parameters, $absolute)
{
$parameters = collect(Arr::wrap($parameters))->map(function ($value, $key) use ($route) {
$value = $value instanceof UrlRoutable && $route->bindingFieldFor($key)
? $value->{$route->bindingFieldFor($key)}
: $value;
return $value instanceof BackedEnum ? $value->value : $value;
})->all();
return $this->routeUrl()->to(
$route, $this->formatParameters($parameters), $absolute
);
}
/**
* Get the URL to a controller action.
*
* @param string|array $action
* @param mixed $parameters
* @param bool $absolute
* @return string
*
* @throws \InvalidArgumentException
*/
public function action($action, $parameters = [], $absolute = true)
{
if (is_null($route = $this->routes->getByAction($action = $this->formatAction($action)))) {
throw new InvalidArgumentException("Action {$action} not defined.");
}
return $this->toRoute($route, $parameters, $absolute);
}
/**
* Format the given controller action.
*
* @param string|array $action
* @return string
*/
protected function formatAction($action)
{
if (is_array($action)) {
$action = '\\'.implode('@', $action);
}
if ($this->rootNamespace && ! str_starts_with($action, '\\')) {
return $this->rootNamespace.'\\'.$action;
}
return trim($action, '\\');
}
/**
* Format the array of URL parameters.
*
* @param mixed|array $parameters
* @return array
*/
public function formatParameters($parameters)
{
$parameters = Arr::wrap($parameters);
foreach ($parameters as $key => $parameter) {
if ($parameter instanceof UrlRoutable) {
$parameters[$key] = $parameter->getRouteKey();
}
}
return $parameters;
}
/**
* Extract the query string from the given path.
*
* @param string $path
* @return array
*/
protected function extractQueryString($path)
{
if (($queryPosition = strpos($path, '?')) !== false) {
return [
substr($path, 0, $queryPosition),
substr($path, $queryPosition),
];
}
return [$path, ''];
}
/**
* Get the base URL for the request.
*
* @param string $scheme
* @param string|null $root
* @return string
*/
public function formatRoot($scheme, $root = null)
{
if (is_null($root)) {
if (is_null($this->cachedRoot)) {
$this->cachedRoot = $this->forcedRoot ?: $this->request->root();
}
$root = $this->cachedRoot;
}
$start = str_starts_with($root, 'http://') ? 'http://' : 'https://';
return preg_replace('~'.$start.'~', $scheme, $root, 1);
}
/**
* Format the given URL segments into a single URL.
*
* @param string $root
* @param string $path
* @param \Illuminate\Routing\Route|null $route
* @return string
*/
public function format($root, $path, $route = null)
{
$path = '/'.trim($path, '/');
if ($this->formatHostUsing) {
$root = call_user_func($this->formatHostUsing, $root, $route);
}
if ($this->formatPathUsing) {
$path = call_user_func($this->formatPathUsing, $path, $route);
}
return trim($root.$path, '/');
}
/**
* Determine if the given path is a valid URL.
*
* @param string $path
* @return bool
*/
public function isValidUrl($path)
{
if (! preg_match('~^(#|//|https?://|(mailto|tel|sms):)~', $path)) {
return filter_var($path, FILTER_VALIDATE_URL) !== false;
}
return true;
}
/**
* Get the Route URL generator instance.
*
* @return \Illuminate\Routing\RouteUrlGenerator
*/
protected function routeUrl()
{
if (! $this->routeGenerator) {
$this->routeGenerator = new RouteUrlGenerator($this, $this->request);
}
return $this->routeGenerator;
}
/**
* Set the default named parameters used by the URL generator.
*
* @param array $defaults
* @return void
*/
public function defaults(array $defaults)
{
$this->routeUrl()->defaults($defaults);
}
/**
* Get the default named parameters used by the URL generator.
*
* @return array
*/
public function getDefaultParameters()
{
return $this->routeUrl()->defaultParameters;
}
/**
* Force the scheme for URLs.
*
* @param string|null $scheme
* @return void
*/
public function forceScheme($scheme)
{
$this->cachedScheme = null;
$this->forceScheme = $scheme ? $scheme.'://' : null;
}
/**
* Set the forced root URL.
*
* @param string|null $root
* @return void
*/
public function forceRootUrl($root)
{
$this->forcedRoot = $root ? rtrim($root, '/') : null;
$this->cachedRoot = null;
}
/**
* Set a callback to be used to format the host of generated URLs.
*
* @param \Closure $callback
* @return $this
*/
public function formatHostUsing(Closure $callback)
{
$this->formatHostUsing = $callback;
return $this;
}
/**
* Set a callback to be used to format the path of generated URLs.
*
* @param \Closure $callback
* @return $this
*/
public function formatPathUsing(Closure $callback)
{
$this->formatPathUsing = $callback;
return $this;
}
/**
* Get the path formatter being used by the URL generator.
*
* @return \Closure
*/
public function pathFormatter()
{
return $this->formatPathUsing ?: function ($path) {
return $path;
};
}
/**
* Get the request instance.
*
* @return \Illuminate\Http\Request
*/
public function getRequest()
{
return $this->request;
}
/**
* Set the current request instance.
*
* @param \Illuminate\Http\Request $request
* @return void
*/
public function setRequest(Request $request)
{
$this->request = $request;
$this->cachedRoot = null;
$this->cachedScheme = null;
tap(optional($this->routeGenerator)->defaultParameters ?: [], function ($defaults) {
$this->routeGenerator = null;
if (! empty($defaults)) {
$this->defaults($defaults);
}
});
}
/**
* Set the route collection.
*
* @param \Illuminate\Routing\RouteCollectionInterface $routes
* @return $this
*/
public function setRoutes(RouteCollectionInterface $routes)
{
$this->routes = $routes;
return $this;
}
/**
* Get the session implementation from the resolver.
*
* @return \Illuminate\Session\Store|null
*/
protected function getSession()
{
if ($this->sessionResolver) {
return call_user_func($this->sessionResolver);
}
}
/**
* Set the session resolver for the generator.
*
* @param callable $sessionResolver
* @return $this
*/
public function setSessionResolver(callable $sessionResolver)
{
$this->sessionResolver = $sessionResolver;
return $this;
}
/**
* Set the encryption key resolver.
*
* @param callable $keyResolver
* @return $this
*/
public function setKeyResolver(callable $keyResolver)
{
$this->keyResolver = $keyResolver;
return $this;
}
/**
* Clone a new instance of the URL generator with a different encryption key resolver.
*
* @param callable $keyResolver
* @return \Illuminate\Routing\UrlGenerator
*/
public function withKeyResolver(callable $keyResolver)
{
return (clone $this)->setKeyResolver($keyResolver);
}
/**
* Set the callback that should be used to attempt to resolve missing named routes.
*
* @param callable $missingNamedRouteResolver
* @return $this
*/
public function resolveMissingNamedRoutesUsing(callable $missingNamedRouteResolver)
{
$this->missingNamedRouteResolver = $missingNamedRouteResolver;
return $this;
}
/**
* Get the root controller namespace.
*
* @return string
*/
public function getRootControllerNamespace()
{
return $this->rootNamespace;
}
/**
* Set the root controller namespace.
*
* @param string $rootNamespace
* @return $this
*/
public function setRootControllerNamespace($rootNamespace)
{
$this->rootNamespace = $rootNamespace;
return $this;
}
}