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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\Routing\Matcher\Dumper;
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13
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14 use Symfony\Component\ExpressionLanguage\ExpressionFunctionProviderInterface;
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15 use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
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16 use Symfony\Component\Routing\Route;
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17 use Symfony\Component\Routing\RouteCollection;
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18
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19 /**
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20 * PhpMatcherDumper creates a PHP class able to match URLs for a given set of routes.
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21 *
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22 * @author Fabien Potencier <fabien@symfony.com>
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23 * @author Tobias Schultze <http://tobion.de>
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24 * @author Arnaud Le Blanc <arnaud.lb@gmail.com>
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25 */
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26 class PhpMatcherDumper extends MatcherDumper
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27 {
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28 private $expressionLanguage;
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29
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30 /**
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31 * @var ExpressionFunctionProviderInterface[]
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32 */
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33 private $expressionLanguageProviders = [];
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34
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35 /**
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36 * Dumps a set of routes to a PHP class.
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37 *
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38 * Available options:
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39 *
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40 * * class: The class name
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41 * * base_class: The base class name
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42 *
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43 * @param array $options An array of options
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44 *
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45 * @return string A PHP class representing the matcher class
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46 */
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47 public function dump(array $options = [])
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48 {
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49 $options = array_replace([
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50 'class' => 'ProjectUrlMatcher',
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51 'base_class' => 'Symfony\\Component\\Routing\\Matcher\\UrlMatcher',
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52 ], $options);
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53
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54 // trailing slash support is only enabled if we know how to redirect the user
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55 $interfaces = class_implements($options['base_class']);
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56 $supportsRedirections = isset($interfaces['Symfony\\Component\\Routing\\Matcher\\RedirectableUrlMatcherInterface']);
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57
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58 return <<<EOF
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59 <?php
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60
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61 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
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62 use Symfony\Component\Routing\Exception\ResourceNotFoundException;
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63 use Symfony\Component\Routing\RequestContext;
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64
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65 /**
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66 * This class has been auto-generated
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67 * by the Symfony Routing Component.
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68 */
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69 class {$options['class']} extends {$options['base_class']}
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70 {
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71 public function __construct(RequestContext \$context)
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72 {
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73 \$this->context = \$context;
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74 }
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75
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76 {$this->generateMatchMethod($supportsRedirections)}
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77 }
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78
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79 EOF;
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80 }
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81
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82 public function addExpressionLanguageProvider(ExpressionFunctionProviderInterface $provider)
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83 {
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84 $this->expressionLanguageProviders[] = $provider;
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85 }
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86
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87 /**
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88 * Generates the code for the match method implementing UrlMatcherInterface.
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89 *
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90 * @param bool $supportsRedirections Whether redirections are supported by the base class
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91 *
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92 * @return string Match method as PHP code
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93 */
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94 private function generateMatchMethod($supportsRedirections)
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95 {
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96 $code = rtrim($this->compileRoutes($this->getRoutes(), $supportsRedirections), "\n");
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97
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98 return <<<EOF
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99 public function match(\$rawPathinfo)
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100 {
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101 \$allow = [];
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102 \$pathinfo = rawurldecode(\$rawPathinfo);
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103 \$trimmedPathinfo = rtrim(\$pathinfo, '/');
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104 \$context = \$this->context;
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105 \$request = \$this->request ?: \$this->createRequest(\$pathinfo);
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106 \$requestMethod = \$canonicalMethod = \$context->getMethod();
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107
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108 if ('HEAD' === \$requestMethod) {
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109 \$canonicalMethod = 'GET';
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110 }
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111
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112 $code
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113
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114 throw 0 < count(\$allow) ? new MethodNotAllowedException(array_unique(\$allow)) : new ResourceNotFoundException();
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115 }
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116 EOF;
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117 }
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118
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119 /**
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120 * Generates PHP code to match a RouteCollection with all its routes.
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121 *
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122 * @param RouteCollection $routes A RouteCollection instance
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123 * @param bool $supportsRedirections Whether redirections are supported by the base class
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124 *
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125 * @return string PHP code
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126 */
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127 private function compileRoutes(RouteCollection $routes, $supportsRedirections)
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128 {
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129 $fetchedHost = false;
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130 $groups = $this->groupRoutesByHostRegex($routes);
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131 $code = '';
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132
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133 foreach ($groups as $collection) {
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134 if (null !== $regex = $collection->getAttribute('host_regex')) {
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135 if (!$fetchedHost) {
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136 $code .= " \$host = \$context->getHost();\n\n";
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137 $fetchedHost = true;
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138 }
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139
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140 $code .= sprintf(" if (preg_match(%s, \$host, \$hostMatches)) {\n", var_export($regex, true));
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141 }
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142
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143 $tree = $this->buildStaticPrefixCollection($collection);
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144 $groupCode = $this->compileStaticPrefixRoutes($tree, $supportsRedirections);
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145
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146 if (null !== $regex) {
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147 // apply extra indention at each line (except empty ones)
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148 $groupCode = preg_replace('/^.{2,}$/m', ' $0', $groupCode);
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149 $code .= $groupCode;
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150 $code .= " }\n\n";
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151 } else {
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152 $code .= $groupCode;
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153 }
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154 }
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155
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156 // used to display the Welcome Page in apps that don't define a homepage
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157 $code .= " if ('/' === \$pathinfo && !\$allow) {\n";
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158 $code .= " throw new Symfony\Component\Routing\Exception\NoConfigurationException();\n";
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159 $code .= " }\n";
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160
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161 return $code;
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162 }
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163
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164 private function buildStaticPrefixCollection(DumperCollection $collection)
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165 {
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166 $prefixCollection = new StaticPrefixCollection();
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167
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168 foreach ($collection as $dumperRoute) {
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169 $prefix = $dumperRoute->getRoute()->compile()->getStaticPrefix();
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170 $prefixCollection->addRoute($prefix, $dumperRoute);
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171 }
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172
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173 $prefixCollection->optimizeGroups();
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174
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175 return $prefixCollection;
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176 }
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177
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178 /**
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179 * Generates PHP code to match a tree of routes.
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180 *
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181 * @param StaticPrefixCollection $collection A StaticPrefixCollection instance
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182 * @param bool $supportsRedirections Whether redirections are supported by the base class
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183 * @param string $ifOrElseIf either "if" or "elseif" to influence chaining
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184 *
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185 * @return string PHP code
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186 */
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187 private function compileStaticPrefixRoutes(StaticPrefixCollection $collection, $supportsRedirections, $ifOrElseIf = 'if')
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188 {
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189 $code = '';
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190 $prefix = $collection->getPrefix();
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191
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192 if (!empty($prefix) && '/' !== $prefix) {
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193 $code .= sprintf(" %s (0 === strpos(\$pathinfo, %s)) {\n", $ifOrElseIf, var_export($prefix, true));
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194 }
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195
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196 $ifOrElseIf = 'if';
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197
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198 foreach ($collection->getItems() as $route) {
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199 if ($route instanceof StaticPrefixCollection) {
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200 $code .= $this->compileStaticPrefixRoutes($route, $supportsRedirections, $ifOrElseIf);
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201 $ifOrElseIf = 'elseif';
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202 } else {
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203 $code .= $this->compileRoute($route[1]->getRoute(), $route[1]->getName(), $supportsRedirections, $prefix)."\n";
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204 $ifOrElseIf = 'if';
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205 }
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206 }
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207
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208 if (!empty($prefix) && '/' !== $prefix) {
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209 $code .= " }\n\n";
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210 // apply extra indention at each line (except empty ones)
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211 $code = preg_replace('/^.{2,}$/m', ' $0', $code);
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212 }
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213
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214 return $code;
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215 }
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216
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217 /**
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218 * Compiles a single Route to PHP code used to match it against the path info.
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219 *
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220 * @param Route $route A Route instance
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221 * @param string $name The name of the Route
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222 * @param bool $supportsRedirections Whether redirections are supported by the base class
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223 * @param string|null $parentPrefix The prefix of the parent collection used to optimize the code
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224 *
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225 * @return string PHP code
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226 *
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227 * @throws \LogicException
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228 */
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229 private function compileRoute(Route $route, $name, $supportsRedirections, $parentPrefix = null)
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230 {
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231 $code = '';
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232 $compiledRoute = $route->compile();
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233 $conditions = [];
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234 $hasTrailingSlash = false;
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235 $matches = false;
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236 $hostMatches = false;
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237 $methods = $route->getMethods();
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238
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239 $supportsTrailingSlash = $supportsRedirections && (!$methods || \in_array('GET', $methods));
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240 $regex = $compiledRoute->getRegex();
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241
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242 if (!\count($compiledRoute->getPathVariables()) && false !== preg_match('#^(.)\^(?P<url>.*?)\$\1#'.('u' === substr($regex, -1) ? 'u' : ''), $regex, $m)) {
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243 if ($supportsTrailingSlash && '/' === substr($m['url'], -1)) {
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244 $conditions[] = sprintf('%s === $trimmedPathinfo', var_export(rtrim(str_replace('\\', '', $m['url']), '/'), true));
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245 $hasTrailingSlash = true;
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246 } else {
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247 $conditions[] = sprintf('%s === $pathinfo', var_export(str_replace('\\', '', $m['url']), true));
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248 }
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249 } else {
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250 if ($compiledRoute->getStaticPrefix() && $compiledRoute->getStaticPrefix() !== $parentPrefix) {
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251 $conditions[] = sprintf('0 === strpos($pathinfo, %s)', var_export($compiledRoute->getStaticPrefix(), true));
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252 }
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253
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254 if ($supportsTrailingSlash && $pos = strpos($regex, '/$')) {
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255 $regex = substr($regex, 0, $pos).'/?$'.substr($regex, $pos + 2);
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256 $hasTrailingSlash = true;
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257 }
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258 $conditions[] = sprintf('preg_match(%s, $pathinfo, $matches)', var_export($regex, true));
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259
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260 $matches = true;
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261 }
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262
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263 if ($compiledRoute->getHostVariables()) {
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264 $hostMatches = true;
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265 }
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266
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267 if ($route->getCondition()) {
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268 $conditions[] = $this->getExpressionLanguage()->compile($route->getCondition(), ['context', 'request']);
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269 }
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270
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271 $conditions = implode(' && ', $conditions);
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272
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273 $code .= <<<EOF
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274 // $name
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275 if ($conditions) {
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276
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277 EOF;
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278
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279 $gotoname = 'not_'.preg_replace('/[^A-Za-z0-9_]/', '', $name);
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280
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281 // the offset where the return value is appended below, with indendation
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282 $retOffset = 12 + \strlen($code);
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283
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284 // optimize parameters array
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285 if ($matches || $hostMatches) {
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286 $vars = [];
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287 if ($hostMatches) {
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288 $vars[] = '$hostMatches';
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289 }
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290 if ($matches) {
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291 $vars[] = '$matches';
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292 }
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293 $vars[] = "['_route' => '$name']";
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294
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295 $code .= sprintf(
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296 " \$ret = \$this->mergeDefaults(array_replace(%s), %s);\n",
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297 implode(', ', $vars),
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298 str_replace("\n", '', var_export($route->getDefaults(), true))
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299 );
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300 } elseif ($route->getDefaults()) {
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301 $code .= sprintf(" \$ret = %s;\n", str_replace("\n", '', var_export(array_replace($route->getDefaults(), ['_route' => $name]), true)));
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302 } else {
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303 $code .= sprintf(" \$ret = ['_route' => '%s'];\n", $name);
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304 }
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305
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306 if ($hasTrailingSlash) {
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307 $code .= <<<EOF
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308 if ('/' === substr(\$pathinfo, -1)) {
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309 // no-op
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310 } elseif ('GET' !== \$canonicalMethod) {
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311 goto $gotoname;
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312 } else {
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313 return array_replace(\$ret, \$this->redirect(\$rawPathinfo.'/', '$name'));
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314 }
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315
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316
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317 EOF;
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318 }
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319
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320 if ($methods) {
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321 $methodVariable = \in_array('GET', $methods) ? '$canonicalMethod' : '$requestMethod';
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322 $methods = implode("', '", $methods);
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323 }
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324
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325 if ($schemes = $route->getSchemes()) {
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326 if (!$supportsRedirections) {
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327 throw new \LogicException('The "schemes" requirement is only supported for URL matchers that implement RedirectableUrlMatcherInterface.');
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328 }
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329 $schemes = str_replace("\n", '', var_export(array_flip($schemes), true));
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330 if ($methods) {
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331 $code .= <<<EOF
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332 \$requiredSchemes = $schemes;
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333 \$hasRequiredScheme = isset(\$requiredSchemes[\$context->getScheme()]);
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334 if (!in_array($methodVariable, ['$methods'])) {
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335 if (\$hasRequiredScheme) {
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336 \$allow = array_merge(\$allow, ['$methods']);
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337 }
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338 goto $gotoname;
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339 }
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340 if (!\$hasRequiredScheme) {
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341 if ('GET' !== \$canonicalMethod) {
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342 goto $gotoname;
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343 }
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344
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345 return array_replace(\$ret, \$this->redirect(\$rawPathinfo, '$name', key(\$requiredSchemes)));
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346 }
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347
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348
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349 EOF;
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350 } else {
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351 $code .= <<<EOF
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352 \$requiredSchemes = $schemes;
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353 if (!isset(\$requiredSchemes[\$context->getScheme()])) {
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354 if ('GET' !== \$canonicalMethod) {
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355 goto $gotoname;
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356 }
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357
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358 return array_replace(\$ret, \$this->redirect(\$rawPathinfo, '$name', key(\$requiredSchemes)));
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359 }
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360
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361
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362 EOF;
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363 }
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364 } elseif ($methods) {
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365 $code .= <<<EOF
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366 if (!in_array($methodVariable, ['$methods'])) {
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367 \$allow = array_merge(\$allow, ['$methods']);
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368 goto $gotoname;
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369 }
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370
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371
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372 EOF;
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373 }
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374
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375 if ($hasTrailingSlash || $schemes || $methods) {
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|
376 $code .= " return \$ret;\n";
|
Chris@14
|
377 } else {
|
Chris@14
|
378 $code = substr_replace($code, 'return', $retOffset, 6);
|
Chris@0
|
379 }
|
Chris@0
|
380 $code .= " }\n";
|
Chris@0
|
381
|
Chris@14
|
382 if ($hasTrailingSlash || $schemes || $methods) {
|
Chris@0
|
383 $code .= " $gotoname:\n";
|
Chris@0
|
384 }
|
Chris@0
|
385
|
Chris@0
|
386 return $code;
|
Chris@0
|
387 }
|
Chris@0
|
388
|
Chris@0
|
389 /**
|
Chris@0
|
390 * Groups consecutive routes having the same host regex.
|
Chris@0
|
391 *
|
Chris@0
|
392 * The result is a collection of collections of routes having the same host regex.
|
Chris@0
|
393 *
|
Chris@0
|
394 * @param RouteCollection $routes A flat RouteCollection
|
Chris@0
|
395 *
|
Chris@0
|
396 * @return DumperCollection A collection with routes grouped by host regex in sub-collections
|
Chris@0
|
397 */
|
Chris@0
|
398 private function groupRoutesByHostRegex(RouteCollection $routes)
|
Chris@0
|
399 {
|
Chris@0
|
400 $groups = new DumperCollection();
|
Chris@0
|
401 $currentGroup = new DumperCollection();
|
Chris@0
|
402 $currentGroup->setAttribute('host_regex', null);
|
Chris@0
|
403 $groups->add($currentGroup);
|
Chris@0
|
404
|
Chris@0
|
405 foreach ($routes as $name => $route) {
|
Chris@0
|
406 $hostRegex = $route->compile()->getHostRegex();
|
Chris@0
|
407 if ($currentGroup->getAttribute('host_regex') !== $hostRegex) {
|
Chris@0
|
408 $currentGroup = new DumperCollection();
|
Chris@0
|
409 $currentGroup->setAttribute('host_regex', $hostRegex);
|
Chris@0
|
410 $groups->add($currentGroup);
|
Chris@0
|
411 }
|
Chris@0
|
412 $currentGroup->add(new DumperRoute($name, $route));
|
Chris@0
|
413 }
|
Chris@0
|
414
|
Chris@0
|
415 return $groups;
|
Chris@0
|
416 }
|
Chris@0
|
417
|
Chris@0
|
418 private function getExpressionLanguage()
|
Chris@0
|
419 {
|
Chris@0
|
420 if (null === $this->expressionLanguage) {
|
Chris@0
|
421 if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
|
Chris@0
|
422 throw new \RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
|
Chris@0
|
423 }
|
Chris@0
|
424 $this->expressionLanguage = new ExpressionLanguage(null, $this->expressionLanguageProviders);
|
Chris@0
|
425 }
|
Chris@0
|
426
|
Chris@0
|
427 return $this->expressionLanguage;
|
Chris@0
|
428 }
|
Chris@0
|
429 }
|