Router.php 12.8 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * Router Class
 *
 * Parses URIs and determines routing
 *
 * @package		CodeIgniter
 * @subpackage	Libraries
 * @category	Libraries
 * @author		EllisLab Dev Team
 * @link		https://codeigniter.com/user_guide/general/routing.html
 */
class CI_Router {

	/**
	 * CI_Config class object
	 *
	 * @var	object
	 */
	public $config;

	/**
	 * List of routes
	 *
	 * @var	array
	 */
	public $routes =	array();

	/**
	 * Current class name
	 *
	 * @var	string
	 */
	public $class =		'';

	/**
	 * Current method name
	 *
	 * @var	string
	 */
	public $method =	'index';

	/**
	 * Sub-directory that contains the requested controller class
	 *
	 * @var	string
	 */
	public $directory;

	/**
	 * Default controller (and method if specific)
	 *
	 * @var	string
	 */
	public $default_controller;

	/**
	 * Translate URI dashes
	 *
	 * Determines whether dashes in controller & method segments
	 * should be automatically replaced by underscores.
	 *
	 * @var	bool
	 */
	public $translate_uri_dashes = FALSE;

	/**
	 * Enable query strings flag
	 *
	 * Determines whether to use GET parameters or segment URIs
	 *
	 * @var	bool
	 */
	public $enable_query_strings = FALSE;

	// --------------------------------------------------------------------

	/**
	 * Class constructor
	 *
	 * Runs the route mapping function.
	 *
	 * @param	array	$routing
	 * @return	void
	 */
	public function __construct($routing = NULL)
	{
		$this->config =& load_class('Config', 'core');
		$this->uri =& load_class('URI', 'core');

		$this->enable_query_strings = ( ! is_cli() && $this->config->item('enable_query_strings') === TRUE);

		// If a directory override is configured, it has to be set before any dynamic routing logic
		is_array($routing) && isset($routing['directory']) && $this->set_directory($routing['directory']);
		$this->_set_routing();

		// Set any routing overrides that may exist in the main index file
		if (is_array($routing))
		{
			empty($routing['controller']) OR $this->set_class($routing['controller']);
			empty($routing['function'])   OR $this->set_method($routing['function']);
		}

		log_message('info', 'Router Class Initialized');
	}

	// --------------------------------------------------------------------

	/**
	 * Set route mapping
	 *
	 * Determines what should be served based on the URI request,
	 * as well as any "routes" that have been set in the routing config file.
	 *
	 * @return	void
	 */
	protected function _set_routing()
	{
		// Load the routes.php file. It would be great if we could
		// skip this for enable_query_strings = TRUE, but then
		// default_controller would be empty ...
		if (file_exists(APPPATH.'config/routes.php'))
		{
			include(APPPATH.'config/routes.php');
		}

		if (file_exists(APPPATH.'config/'.ENVIRONMENT.'/routes.php'))
		{
			include(APPPATH.'config/'.ENVIRONMENT.'/routes.php');
		}

		// Validate & get reserved routes
		if (isset($route) && is_array($route))
		{
			isset($route['default_controller']) && $this->default_controller = $route['default_controller'];
			isset($route['translate_uri_dashes']) && $this->translate_uri_dashes = $route['translate_uri_dashes'];
			unset($route['default_controller'], $route['translate_uri_dashes']);
			$this->routes = $route;
		}

		// Are query strings enabled in the config file? Normally CI doesn't utilize query strings
		// since URI segments are more search-engine friendly, but they can optionally be used.
		// If this feature is enabled, we will gather the directory/class/method a little differently
		if ($this->enable_query_strings)
		{
			// If the directory is set at this time, it means an override exists, so skip the checks
			if ( ! isset($this->directory))
			{
				$_d = $this->config->item('directory_trigger');
				$_d = isset($_GET[$_d]) ? trim($_GET[$_d], " \t\n\r\0\x0B/") : '';

				if ($_d !== '')
				{
					$this->uri->filter_uri($_d);
					$this->set_directory($_d);
				}
			}

			$_c = trim($this->config->item('controller_trigger'));
			if ( ! empty($_GET[$_c]))
			{
				$this->uri->filter_uri($_GET[$_c]);
				$this->set_class($_GET[$_c]);

				$_f = trim($this->config->item('function_trigger'));
				if ( ! empty($_GET[$_f]))
				{
					$this->uri->filter_uri($_GET[$_f]);
					$this->set_method($_GET[$_f]);
				}

				$this->uri->rsegments = array(
					1 => $this->class,
					2 => $this->method
				);
			}
			else
			{
				$this->_set_default_controller();
			}

			// Routing rules don't apply to query strings and we don't need to detect
			// directories, so we're done here
			return;
		}

		// Is there anything to parse?
		if ($this->uri->uri_string !== '')
		{
			$this->_parse_routes();
		}
		else
		{
			$this->_set_default_controller();
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Set request route
	 *
	 * Takes an array of URI segments as input and sets the class/method
	 * to be called.
	 *
	 * @used-by	CI_Router::_parse_routes()
	 * @param	array	$segments	URI segments
	 * @return	void
	 */
	protected function _set_request($segments = array())
	{
		$segments = $this->_validate_request($segments);
		// If we don't have any segments left - try the default controller;
		// WARNING: Directories get shifted out of the segments array!
		if (empty($segments))
		{
			$this->_set_default_controller();
			return;
		}

		if ($this->translate_uri_dashes === TRUE)
		{
			$segments[0] = str_replace('-', '_', $segments[0]);
			if (isset($segments[1]))
			{
				$segments[1] = str_replace('-', '_', $segments[1]);
			}
		}

		$this->set_class($segments[0]);
		if (isset($segments[1]))
		{
			$this->set_method($segments[1]);
		}
		else
		{
			$segments[1] = 'index';
		}

		array_unshift($segments, NULL);
		unset($segments[0]);
		$this->uri->rsegments = $segments;
	}

	// --------------------------------------------------------------------

	/**
	 * Set default controller
	 *
	 * @return	void
	 */
	protected function _set_default_controller()
	{
		if (empty($this->default_controller))
		{
			show_error('Unable to determine what should be displayed. A default route has not been specified in the routing file.');
		}

		// Is the method being specified?
		if (sscanf($this->default_controller, '%[^/]/%s', $class, $method) !== 2)
		{
			$method = 'index';
		}

		if ( ! file_exists(APPPATH.'controllers/'.$this->directory.ucfirst($class).'.php'))
		{
			// This will trigger 404 later
			return;
		}

		$this->set_class($class);
		$this->set_method($method);

		// Assign routed segments, index starting from 1
		$this->uri->rsegments = array(
			1 => $class,
			2 => $method
		);

		log_message('debug', 'No URI present. Default controller set.');
	}

	// --------------------------------------------------------------------

	/**
	 * Validate request
	 *
	 * Attempts validate the URI request and determine the controller path.
	 *
	 * @used-by	CI_Router::_set_request()
	 * @param	array	$segments	URI segments
	 * @return	mixed	URI segments
	 */
	protected function _validate_request($segments)
	{
		$c = count($segments);
		$directory_override = isset($this->directory);

		// Loop through our segments and return as soon as a controller
		// is found or when such a directory doesn't exist
		while ($c-- > 0)
		{
			$test = $this->directory
				.ucfirst($this->translate_uri_dashes === TRUE ? str_replace('-', '_', $segments[0]) : $segments[0]);

			if ( ! file_exists(APPPATH.'controllers/'.$test.'.php')
				&& $directory_override === FALSE
				&& is_dir(APPPATH.'controllers/'.$this->directory.$segments[0])
			)
			{
				$this->set_directory(array_shift($segments), TRUE);
				continue;
			}

			return $segments;
		}

		// This means that all segments were actually directories
		return $segments;
	}

	// --------------------------------------------------------------------

	/**
	 * Parse Routes
	 *
	 * Matches any routes that may exist in the config/routes.php file
	 * against the URI to determine if the class/method need to be remapped.
	 *
	 * @return	void
	 */
	protected function _parse_routes()
	{
		// Turn the segment array into a URI string
		$uri = implode('/', $this->uri->segments);

		// Get HTTP verb
		$http_verb = isset($_SERVER['REQUEST_METHOD']) ? strtolower($_SERVER['REQUEST_METHOD']) : 'cli';

		// Loop through the route array looking for wildcards
		foreach ($this->routes as $key => $val)
		{
			// Check if route format is using HTTP verbs
			if (is_array($val))
			{
				$val = array_change_key_case($val, CASE_LOWER);
				if (isset($val[$http_verb]))
				{
					$val = $val[$http_verb];
				}
				else
				{
					continue;
				}
			}

			// Convert wildcards to RegEx
			$key = str_replace(array(':any', ':num'), array('[^/]+', '[0-9]+'), $key);

			// Does the RegEx match?
			if (preg_match('#^'.$key.'$#', $uri, $matches))
			{
				// Are we using callbacks to process back-references?
				if ( ! is_string($val) && is_callable($val))
				{
					// Remove the original string from the matches array.
					array_shift($matches);

					// Execute the callback using the values in matches as its parameters.
					$val = call_user_func_array($val, $matches);
				}
				// Are we using the default routing method for back-references?
				elseif (strpos($val, '$') !== FALSE && strpos($key, '(') !== FALSE)
				{
					$val = preg_replace('#^'.$key.'$#', $val, $uri);
				}

				$this->_set_request(explode('/', $val));
				return;
			}
		}

		// If we got this far it means we didn't encounter a
		// matching route so we'll set the site default route
		$this->_set_request(array_values($this->uri->segments));
	}

	// --------------------------------------------------------------------

	/**
	 * Set class name
	 *
	 * @param	string	$class	Class name
	 * @return	void
	 */
	public function set_class($class)
	{
		$this->class = str_replace(array('/', '.'), '', $class);
	}

	// --------------------------------------------------------------------

	/**
	 * Fetch the current class
	 *
	 * @deprecated	3.0.0	Read the 'class' property instead
	 * @return	string
	 */
	public function fetch_class()
	{
		return $this->class;
	}

	// --------------------------------------------------------------------

	/**
	 * Set method name
	 *
	 * @param	string	$method	Method name
	 * @return	void
	 */
	public function set_method($method)
	{
		$this->method = $method;
	}

	// --------------------------------------------------------------------

	/**
	 * Fetch the current method
	 *
	 * @deprecated	3.0.0	Read the 'method' property instead
	 * @return	string
	 */
	public function fetch_method()
	{
		return $this->method;
	}

	// --------------------------------------------------------------------

	/**
	 * Set directory name
	 *
	 * @param	string	$dir	Directory name
	 * @param	bool	$append	Whether we're appending rather than setting the full value
	 * @return	void
	 */
	public function set_directory($dir, $append = FALSE)
	{
		if ($append !== TRUE OR empty($this->directory))
		{
			$this->directory = str_replace('.', '', trim($dir, '/')).'/';
		}
		else
		{
			$this->directory .= str_replace('.', '', trim($dir, '/')).'/';
		}
	}

	// --------------------------------------------------------------------

	/**
	 * Fetch directory
	 *
	 * Feches the sub-directory (if any) that contains the requested
	 * controller class.
	 *
	 * @deprecated	3.0.0	Read the 'directory' property instead
	 * @return	string
	 */
	public function fetch_directory()
	{
		return $this->directory;
	}

}