[Routing] fixed RouteCompiler for adjacent and nested placeholders
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@ -15,6 +15,7 @@ namespace Symfony\Component\Routing;
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* RouteCompiler compiles Route instances to CompiledRoute instances.
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* RouteCompiler compiles Route instances to CompiledRoute instances.
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*
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*
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Fabien Potencier <fabien@symfony.com>
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* @author Tobias Schultze <http://tobion.de>
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*/
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*/
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class RouteCompiler implements RouteCompilerInterface
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class RouteCompiler implements RouteCompilerInterface
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{
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{
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@ -30,45 +31,50 @@ class RouteCompiler implements RouteCompilerInterface
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public function compile(Route $route)
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public function compile(Route $route)
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{
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{
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$pattern = $route->getPattern();
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$pattern = $route->getPattern();
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$len = strlen($pattern);
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$tokens = array();
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$tokens = array();
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$variables = array();
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$variables = array();
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$matches = array();
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$pos = 0;
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$pos = 0;
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preg_match_all('#.\{(\w+)\}#', $pattern, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER);
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$lastSeparator = '';
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// Match all variables enclosed in "{}" and iterate over them. But we only want to match the innermost variable
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// in case of nested "{}", e.g. {foo{bar}}. This in ensured because \w does not match "{" or "}" itself.
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preg_match_all('#\{\w+\}#', $pattern, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER);
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foreach ($matches as $match) {
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foreach ($matches as $match) {
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if ($text = substr($pattern, $pos, $match[0][1] - $pos)) {
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$varName = substr($match[0][0], 1, -1);
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$tokens[] = array('text', $text);
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// get all static text preceding the current variable
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}
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$precedingText = substr($pattern, $pos, $match[0][1] - $pos);
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$pos = $match[0][1] + strlen($match[0][0]);
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$pos = $match[0][1] + strlen($match[0][0]);
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$var = $match[1][0];
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$precedingChar = strlen($precedingText) > 0 ? substr($precedingText, -1) : '';
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if (null !== $req = $route->getRequirement($var)) {
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if (is_numeric($varName)) {
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$regexp = $req;
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throw new \DomainException(sprintf('Variable name "%s" cannot be numeric in route pattern "%s". Please use a different name.', $varName, $pattern));
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} else {
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// Use the character preceding the variable as a separator
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$separators = array($match[0][0][0]);
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if ($pos !== $len) {
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// Use the character following the variable as the separator when available
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$separators[] = $pattern[$pos];
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}
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}
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$regexp = sprintf('[^%s]+', preg_quote(implode('', array_unique($separators)), self::REGEX_DELIMITER));
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if (in_array($varName, $variables)) {
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throw new \LogicException(sprintf('Route pattern "%s" cannot reference variable name "%s" more than once.', $pattern, $varName));
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}
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}
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$tokens[] = array('variable', $match[0][0][0], $regexp, $var);
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if (strlen($precedingText) > 1) {
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$tokens[] = array('text', substr($precedingText, 0, -1));
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if (is_numeric($var)) {
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throw new \DomainException(sprintf('Variable name "%s" cannot be numeric in route pattern "%s". Please use a different name.', $var, $route->getPattern()));
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}
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}
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if (in_array($var, $variables)) {
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// use the character preceding the variable as a separator
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throw new \LogicException(sprintf('Route pattern "%s" cannot reference variable name "%s" more than once.', $route->getPattern(), $var));
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// save it for later use as default separator for variables that follow directly without having a preceding char e.g. "/{x}{y}"
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if ('' !== $precedingChar) {
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$lastSeparator = $precedingChar;
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}
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}
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$variables[] = $var;
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$regexp = $route->getRequirement($varName);
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if (null === $regexp) {
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// use the character following the variable (ignoring other placeholders) as a separator when it's not the same as the preceding separator
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$nextSeparator = $this->findNextSeparator(substr($pattern, $pos));
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$regexp = sprintf('[^%s]+', preg_quote($lastSeparator !== $nextSeparator ? $lastSeparator.$nextSeparator : $lastSeparator, self::REGEX_DELIMITER));
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}
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}
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if ($pos < $len) {
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$tokens[] = array('variable', $precedingChar, $regexp, $varName);
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$variables[] = $varName;
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}
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if ($pos < strlen($pattern)) {
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$tokens[] = array('text', substr($pattern, $pos));
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$tokens[] = array('text', substr($pattern, $pos));
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}
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}
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@ -97,6 +103,25 @@ class RouteCompiler implements RouteCompilerInterface
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);
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);
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}
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}
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/**
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* Returns the next static character in the Route pattern that will serve as a separator.
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*
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* @param string $pattern The route pattern
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*
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* @return string The next static character (or empty string when none available)
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*/
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private function findNextSeparator($pattern)
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{
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if ('' == $pattern) {
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// return empty string if pattern is empty or false (false which can be returned by substr)
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return '';
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}
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// first remove all placeholders from the pattern so we can find the next real static character
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$pattern = preg_replace('#\{\w+\}#', '', $pattern);
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return isset($pattern[0]) ? $pattern[0] : '';
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}
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/**
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/**
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* Computes the regexp used to match a specific token. It can be static text or a subpattern.
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* Computes the regexp used to match a specific token. It can be static text or a subpattern.
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*
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*
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@ -255,6 +255,19 @@ class UrlGeneratorTest extends \PHPUnit_Framework_TestCase
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$this->assertSame('/app.php/a./.a/a../..a/...', $this->getGenerator($routes)->generate('test'));
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$this->assertSame('/app.php/a./.a/a../..a/...', $this->getGenerator($routes)->generate('test'));
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}
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}
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public function testAdjacentVariables()
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{
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$routes = $this->getRoutes('test', new Route('/{x}{y}{z}.{_format}', array('z' => 'default-z', '_format' => 'html'), array('y' => '\d+')));
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$generator = $this->getGenerator($routes);
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$this->assertSame('/app.php/foo123', $generator->generate('test', array('x' => 'foo', 'y' => '123')));
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$this->assertSame('/app.php/foo123bar.xml', $generator->generate('test', array('x' => 'foo', 'y' => '123', 'z' => 'bar', '_format' => 'xml')));
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// The default requirement for 'x' should not allow the separator '.' in this case because it would otherwise match everything
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// and following optional variables like _format could never match.
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$this->setExpectedException('Symfony\Component\Routing\Exception\InvalidParameterException');
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$generator->generate('test', array('x' => 'do.t', 'y' => '123', 'z' => 'bar', '_format' => 'xml'));
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}
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protected function getGenerator(RouteCollection $routes, array $parameters = array(), $logger = null)
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protected function getGenerator(RouteCollection $routes, array $parameters = array(), $logger = null)
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{
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{
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$context = new RequestContext('/app.php');
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$context = new RequestContext('/app.php');
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@ -232,6 +232,26 @@ class UrlMatcherTest extends \PHPUnit_Framework_TestCase
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$this->assertEquals(array('foo' => 'text1-text2-text3', 'bar' => 'text4', '_route' => 'test'), $matcher->match('/text1-text2-text3-text4-'));
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$this->assertEquals(array('foo' => 'text1-text2-text3', 'bar' => 'text4', '_route' => 'test'), $matcher->match('/text1-text2-text3-text4-'));
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}
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}
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public function testAdjacentVariables()
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{
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$coll = new RouteCollection();
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$coll->add('test', new Route('/{w}{x}{y}{z}.{_format}', array('z' => 'default-z', '_format' => 'html'), array('y' => 'y|Y')));
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$matcher = new UrlMatcher($coll, new RequestContext());
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// 'w' eagerly matches as much as possible and the other variables match the remaining chars.
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// This also shows that the variables w-z must all exclude the separating char (the dot '.' in this case) by default requirement.
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// Otherwise they would also comsume '.xml' and _format would never match as it's an optional variable.
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$this->assertEquals(array('w' => 'wwwww', 'x' => 'x', 'y' => 'Y', 'z' => 'Z','_format' => 'xml', '_route' => 'test'), $matcher->match('/wwwwwxYZ.xml'));
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// As 'y' has custom requirement and can only be of value 'y|Y', it will leave 'ZZZ' to variable z.
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// So with carefully chosen requirements adjacent variables, can be useful.
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$this->assertEquals(array('w' => 'wwwww', 'x' => 'x', 'y' => 'y', 'z' => 'ZZZ','_format' => 'html', '_route' => 'test'), $matcher->match('/wwwwwxyZZZ'));
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// z and _format are optional.
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$this->assertEquals(array('w' => 'wwwww', 'x' => 'x', 'y' => 'y', 'z' => 'default-z','_format' => 'html', '_route' => 'test'), $matcher->match('/wwwwwxy'));
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$this->setExpectedException('Symfony\Component\Routing\Exception\ResourceNotFoundException');
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$matcher->match('/wxy.html');
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}
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/**
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/**
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* @expectedException Symfony\Component\Routing\Exception\ResourceNotFoundException
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* @expectedException Symfony\Component\Routing\Exception\ResourceNotFoundException
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*/
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*/
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@ -120,6 +120,26 @@ class RouteCompilerTest extends \PHPUnit_Framework_TestCase
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array('text', '/foo'),
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array('text', '/foo'),
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)),
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)),
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array(
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'Route with nested placeholders',
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array('/{static{var}static}'),
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'/{stati', '#^/\{static(?<var>[^cs]+)static\}$#s', array('var'), array(
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array('text', 'static}'),
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array('variable', 'c', '[^cs]+', 'var'),
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array('text', '/{stati'),
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)),
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array(
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'Route without separator between variables',
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array('/{w}{x}{y}{z}.{_format}', array('z' => 'default-z', '_format' => 'html'), array('y' => '(y|Y)')),
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'', '#^/(?<w>[^/\.]+)(?<x>[^/\.]+)(?<y>(y|Y))(?:(?<z>[^/\.]+)(?:\.(?<_format>[^\.]+))?)?$#s', array('w', 'x', 'y', 'z', '_format'), array(
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array('variable', '.', '[^\.]+', '_format'),
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array('variable', '', '[^/\.]+', 'z'),
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array('variable', '', '(y|Y)', 'y'),
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array('variable', '', '[^/\.]+', 'x'),
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array('variable', '/', '[^/\.]+', 'w'),
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)),
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array(
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array(
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'Route with a format',
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'Route with a format',
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array('/foo/{bar}.{_format}'),
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array('/foo/{bar}.{_format}'),
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