vendor/symfony/routing/Generator/UrlGenerator.php line 153
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Routing\Generator;use Psr\Log\LoggerInterface;use Symfony\Component\Routing\Exception\InvalidParameterException;use Symfony\Component\Routing\Exception\MissingMandatoryParametersException;use Symfony\Component\Routing\Exception\RouteNotFoundException;use Symfony\Component\Routing\RequestContext;use Symfony\Component\Routing\RouteCollection;/*** UrlGenerator can generate a URL or a path for any route in the RouteCollection* based on the passed parameters.** @author Fabien Potencier <fabien@symfony.com>* @author Tobias Schultze <http://tobion.de>*/class UrlGenerator implements UrlGeneratorInterface, ConfigurableRequirementsInterface{private const QUERY_FRAGMENT_DECODED = [// RFC 3986 explicitly allows those in the query/fragment to reference other URIs unencoded'%2F' => '/','%252F' => '%2F','%3F' => '?',// reserved chars that have no special meaning for HTTP URIs in a query or fragment// this excludes esp. "&", "=" and also "+" because PHP would treat it as a space (form-encoded)'%40' => '@','%3A' => ':','%21' => '!','%3B' => ';','%2C' => ',','%2A' => '*',];protected $routes;protected $context;/*** @var bool|null*/protected $strictRequirements = true;protected $logger;private ?string $defaultLocale;/*** This array defines the characters (besides alphanumeric ones) that will not be percent-encoded in the path segment of the generated URL.** PHP's rawurlencode() encodes all chars except "a-zA-Z0-9-._~" according to RFC 3986. But we want to allow some chars* to be used in their literal form (reasons below). Other chars inside the path must of course be encoded, e.g.* "?" and "#" (would be interpreted wrongly as query and fragment identifier),* "'" and """ (are used as delimiters in HTML).*/protected $decodedChars = [// the slash can be used to designate a hierarchical structure and we want allow using it with this meaning// some webservers don't allow the slash in encoded form in the path for security reasons anyway// see http://stackoverflow.com/questions/4069002/http-400-if-2f-part-of-get-url-in-jboss'%2F' => '/','%252F' => '%2F',// the following chars are general delimiters in the URI specification but have only special meaning in the authority component// so they can safely be used in the path in unencoded form'%40' => '@','%3A' => ':',// these chars are only sub-delimiters that have no predefined meaning and can therefore be used literally// so URI producing applications can use these chars to delimit subcomponents in a path segment without being encoded for better readability'%3B' => ';','%2C' => ',','%3D' => '=','%2B' => '+','%21' => '!','%2A' => '*','%7C' => '|',];public function __construct(RouteCollection $routes, RequestContext $context, LoggerInterface $logger = null, string $defaultLocale = null){$this->routes = $routes;$this->context = $context;$this->logger = $logger;$this->defaultLocale = $defaultLocale;}public function setContext(RequestContext $context){$this->context = $context;}public function getContext(): RequestContext{return $this->context;}public function setStrictRequirements(?bool $enabled){$this->strictRequirements = $enabled;}public function isStrictRequirements(): ?bool{return $this->strictRequirements;}public function generate(string $name, array $parameters = [], int $referenceType = self::ABSOLUTE_PATH): string{$route = null;$locale = $parameters['_locale'] ?? $this->context->getParameter('_locale') ?: $this->defaultLocale;if (null !== $locale) {do {if (null !== ($route = $this->routes->get($name.'.'.$locale)) && $route->getDefault('_canonical_route') === $name) {break;}} while (false !== $locale = strstr($locale, '_', true));}if (null === $route ??= $this->routes->get($name)) {throw new RouteNotFoundException(sprintf('Unable to generate a URL for the named route "%s" as such route does not exist.', $name));}// the Route has a cache of its own and is not recompiled as long as it does not get modified$compiledRoute = $route->compile();$defaults = $route->getDefaults();$variables = $compiledRoute->getVariables();if (isset($defaults['_canonical_route']) && isset($defaults['_locale'])) {if (!\in_array('_locale', $variables, true)) {unset($parameters['_locale']);} elseif (!isset($parameters['_locale'])) {$parameters['_locale'] = $defaults['_locale'];}}return $this->doGenerate($variables, $defaults, $route->getRequirements(), $compiledRoute->getTokens(), $parameters, $name, $referenceType, $compiledRoute->getHostTokens(), $route->getSchemes());}/*** @throws MissingMandatoryParametersException When some parameters are missing that are mandatory for the route* @throws InvalidParameterException When a parameter value for a placeholder is not correct because* it does not match the requirement*/protected function doGenerate(array $variables, array $defaults, array $requirements, array $tokens, array $parameters, string $name, int $referenceType, array $hostTokens, array $requiredSchemes = []): string{$variables = array_flip($variables);$mergedParams = array_replace($defaults, $this->context->getParameters(), $parameters);// all params must be givenif ($diff = array_diff_key($variables, $mergedParams)) {throw new MissingMandatoryParametersException($name, array_keys($diff));}$url = '';$optional = true;$message = 'Parameter "{parameter}" for route "{route}" must match "{expected}" ("{given}" given) to generate a corresponding URL.';foreach ($tokens as $token) {if ('variable' === $token[0]) {$varName = $token[3];// variable is not important by default$important = $token[5] ?? false;if (!$optional || $important || !\array_key_exists($varName, $defaults) || (null !== $mergedParams[$varName] && (string) $mergedParams[$varName] !== (string) $defaults[$varName])) {// check requirement (while ignoring look-around patterns)if (null !== $this->strictRequirements && !preg_match('#^'.preg_replace('/\(\?(?:=|<=|!|<!)((?:[^()\\\\]+|\\\\.|\((?1)\))*)\)/', '', $token[2]).'$#i'.(empty($token[4]) ? '' : 'u'), $mergedParams[$token[3]] ?? '')) {if ($this->strictRequirements) {throw new InvalidParameterException(strtr($message, ['{parameter}' => $varName, '{route}' => $name, '{expected}' => $token[2], '{given}' => $mergedParams[$varName]]));}$this->logger?->error($message, ['parameter' => $varName, 'route' => $name, 'expected' => $token[2], 'given' => $mergedParams[$varName]]);return '';}$url = $token[1].$mergedParams[$varName].$url;$optional = false;}} else {// static text$url = $token[1].$url;$optional = false;}}if ('' === $url) {$url = '/';}// the contexts base URL is already encoded (see Symfony\Component\HttpFoundation\Request)$url = strtr(rawurlencode($url), $this->decodedChars);// the path segments "." and ".." are interpreted as relative reference when resolving a URI; see http://tools.ietf.org/html/rfc3986#section-3.3// so we need to encode them as they are not used for this purpose here// otherwise we would generate a URI that, when followed by a user agent (e.g. browser), does not match this route$url = strtr($url, ['/../' => '/%2E%2E/', '/./' => '/%2E/']);if (str_ends_with($url, '/..')) {$url = substr($url, 0, -2).'%2E%2E';} elseif (str_ends_with($url, '/.')) {$url = substr($url, 0, -1).'%2E';}$schemeAuthority = '';$host = $this->context->getHost();$scheme = $this->context->getScheme();if ($requiredSchemes) {if (!\in_array($scheme, $requiredSchemes, true)) {$referenceType = self::ABSOLUTE_URL;$scheme = current($requiredSchemes);}}if ($hostTokens) {$routeHost = '';foreach ($hostTokens as $token) {if ('variable' === $token[0]) {// check requirement (while ignoring look-around patterns)if (null !== $this->strictRequirements && !preg_match('#^'.preg_replace('/\(\?(?:=|<=|!|<!)((?:[^()\\\\]+|\\\\.|\((?1)\))*)\)/', '', $token[2]).'$#i'.(empty($token[4]) ? '' : 'u'), $mergedParams[$token[3]])) {if ($this->strictRequirements) {throw new InvalidParameterException(strtr($message, ['{parameter}' => $token[3], '{route}' => $name, '{expected}' => $token[2], '{given}' => $mergedParams[$token[3]]]));}$this->logger?->error($message, ['parameter' => $token[3], 'route' => $name, 'expected' => $token[2], 'given' => $mergedParams[$token[3]]]);return '';}$routeHost = $token[1].$mergedParams[$token[3]].$routeHost;} else {$routeHost = $token[1].$routeHost;}}if ($routeHost !== $host) {$host = $routeHost;if (self::ABSOLUTE_URL !== $referenceType) {$referenceType = self::NETWORK_PATH;}}}if (self::ABSOLUTE_URL === $referenceType || self::NETWORK_PATH === $referenceType) {if ('' !== $host || ('' !== $scheme && 'http' !== $scheme && 'https' !== $scheme)) {$port = '';if ('http' === $scheme && 80 !== $this->context->getHttpPort()) {$port = ':'.$this->context->getHttpPort();} elseif ('https' === $scheme && 443 !== $this->context->getHttpsPort()) {$port = ':'.$this->context->getHttpsPort();}$schemeAuthority = self::NETWORK_PATH === $referenceType || '' === $scheme ? '//' : "$scheme://";$schemeAuthority .= $host.$port;}}if (self::RELATIVE_PATH === $referenceType) {$url = self::getRelativePath($this->context->getPathInfo(), $url);} else {$url = $schemeAuthority.$this->context->getBaseUrl().$url;}// add a query string if needed$extra = array_udiff_assoc(array_diff_key($parameters, $variables), $defaults, function ($a, $b) {return $a == $b ? 0 : 1;});array_walk_recursive($extra, $caster = static function (&$v) use (&$caster) {if (\is_object($v)) {if ($vars = get_object_vars($v)) {array_walk_recursive($vars, $caster);$v = $vars;} elseif (method_exists($v, '__toString')) {$v = (string) $v;}}});// extract fragment$fragment = $defaults['_fragment'] ?? '';if (isset($extra['_fragment'])) {$fragment = $extra['_fragment'];unset($extra['_fragment']);}if ($extra && $query = http_build_query($extra, '', '&', \PHP_QUERY_RFC3986)) {$url .= '?'.strtr($query, self::QUERY_FRAGMENT_DECODED);}if ('' !== $fragment) {$url .= '#'.strtr(rawurlencode($fragment), self::QUERY_FRAGMENT_DECODED);}return $url;}/*** Returns the target path as relative reference from the base path.** Only the URIs path component (no schema, host etc.) is relevant and must be given, starting with a slash.* Both paths must be absolute and not contain relative parts.* Relative URLs from one resource to another are useful when generating self-contained downloadable document archives.* Furthermore, they can be used to reduce the link size in documents.** Example target paths, given a base path of "/a/b/c/d":* - "/a/b/c/d" -> ""* - "/a/b/c/" -> "./"* - "/a/b/" -> "../"* - "/a/b/c/other" -> "other"* - "/a/x/y" -> "../../x/y"** @param string $basePath The base path* @param string $targetPath The target path*/public static function getRelativePath(string $basePath, string $targetPath): string{if ($basePath === $targetPath) {return '';}$sourceDirs = explode('/', isset($basePath[0]) && '/' === $basePath[0] ? substr($basePath, 1) : $basePath);$targetDirs = explode('/', isset($targetPath[0]) && '/' === $targetPath[0] ? substr($targetPath, 1) : $targetPath);array_pop($sourceDirs);$targetFile = array_pop($targetDirs);foreach ($sourceDirs as $i => $dir) {if (isset($targetDirs[$i]) && $dir === $targetDirs[$i]) {unset($sourceDirs[$i], $targetDirs[$i]);} else {break;}}$targetDirs[] = $targetFile;$path = str_repeat('../', \count($sourceDirs)).implode('/', $targetDirs);// A reference to the same base directory or an empty subdirectory must be prefixed with "./".// This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used// as the first segment of a relative-path reference, as it would be mistaken for a scheme name// (see http://tools.ietf.org/html/rfc3986#section-4.2).return '' === $path || '/' === $path[0]|| false !== ($colonPos = strpos($path, ':')) && ($colonPos < ($slashPos = strpos($path, '/')) || false === $slashPos)? "./$path" : $path;}}