silverstripe-framework/core/control/Director.php
Ingo Schommer d26f08b481 MINOR merged branches/2.3 into trunk
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@67465 467b73ca-7a2a-4603-9d3b-597d59a354a9
2008-12-04 22:38:32 +00:00

740 lines
25 KiB
PHP

<?php
/**
* Director is responsible for processing URLs, and providing environment information.
*
* The most important part of director is {@link Director::direct()}, which is passed a URL and will execute the appropriate
* controller.
*
* Director also has a number of static methods that provide information about the environment, such as {@link Director::set_environment_type()}.
*
* @package sapphire
* @subpackage control
* @see Director::direct(),Director::addRules(),Director::set_environment_type()
*/
class Director {
static private $urlSegment;
static private $urlParams;
static private $rules = array();
static $siteMode;
static $alternateBaseFolder;
static $alternateBaseURL;
static $dev_servers = array(
'localhost',
'127.0.0.1'
);
static $test_servers = array();
static protected $environment_type;
/**
* Sets the site mode (if it is the public site or the cms),
* and runs registered modules.
*/
static protected $callbacks;
function __construct() {
if(isset($_GET['debug_profile'])) Profiler::mark("Director", "construct");
Session::addToArray('history', substr($_SERVER['REQUEST_URI'], strlen(Director::baseURL())));
if(isset($_GET['debug_profile'])) Profiler::unmark("Director", "construct");
}
/**
* Return a URL from this user's navigation history.
* @param pagesBack The number of pages back to go. The default, 1, returns the previous
* page.
*/
static function history($pagesBack = 1) {
return Session::get('history.' . sizeof(Session::get('history')) - $pagesBack - 1);
}
/**
* Add URL matching rules to the Director.
*
* The director is responsible for turning URLs into Controller objects. It does thi
*
* @param $priority The priority of the rules; higher values will get your rule checked first.
* We recommend priority 100 for your site's rules. The built-in rules are priority 10, standard modules are priority 50.
*/
static function addRules($priority, $rules) {
Director::$rules[$priority] = isset(Director::$rules[$priority]) ? array_merge($rules, (array)Director::$rules[$priority]) : $rules;
}
/**
* Process the given URL, creating the appropriate controller and executing it.
*
* Request processing is handled as folows:
* - Director::direct() creates a new HTTPResponse object and passes this to Director::handleRequest().
* - Director::handleRequest($request) checks each of the Director rules and identifies a controller to handle this
* request.
* - Controller::handleRequest($request) is then called. This will find a rule to handle the URL, and call the rule
* handling method.
* - RequestHandler::handleRequest($request) is recursively called whenever a rule handling method returns a
* RequestHandler object.
*
* In addition to request processing, Director will manage the session, and perform the output of the actual response
* to the browser.
*
* @param $url String, the URL the user is visiting, without the querystring.
* @uses handleRequest() rule-lookup logic is handled by this.
* @uses Controller::run() Controller::run() handles the page logic for a Director::direct() call.
*/
static function direct($url) {
$req = new HTTPRequest(
(isset($_SERVER['X-HTTP-Method-Override'])) ? $_SERVER['X-HTTP-Method-Override'] : $_SERVER['REQUEST_METHOD'],
$url,
$_GET,
array_merge((array)$_POST, (array)$_FILES),
@file_get_contents('php://input')
);
// @todo find better way to extract HTTP headers
if(isset($_SERVER['HTTP_ACCEPT'])) $req->addHeader("Accept", $_SERVER['HTTP_ACCEPT']);
if(isset($_SERVER['CONTENT_TYPE'])) $req->addHeader("Content-Type", $_SERVER['CONTENT_TYPE']);
if(isset($_SERVER['HTTP_REFERER'])) $req->addHeader("Referer", $_SERVER['HTTP_REFERER']);
// Load the session into the controller
$session = new Session($_SESSION);
$result = Director::handleRequest($req, $session);
$session->inst_save();
// Return code for a redirection request
if(is_string($result) && substr($result,0,9) == 'redirect:') {
$response = new HTTPResponse();
$response->redirect(substr($result, 9));
$response->output();
// Handle a controller
} else if($result) {
if($result instanceof HTTPResponse) {
$response = $result;
} else {
$response = new HTTPResponse();
$response->setBody($result);
}
// ?debug_memory=1 will output the number of bytes of memory used for this request
if(isset($_REQUEST['debug_memory']) && $_REQUEST['debug_memory']) {
echo number_format(memory_get_peak_usage(),0);
} else {
$response->output();
}
//$controllerObj->getSession()->inst_save();
}
}
/**
* Test a URL request, returning a response object.
*
* This method is the counterpart of Director::direct() that is used in functional testing. It will execute the URL given,
*
* @param string $url The URL to visit
* @param array $postVars The $_POST & $_FILES variables
* @param Session $session The {@link Session} object representing the current session. By passing the same object to multiple
* calls of Director::test(), you can simulate a peristed session.
* @param string $httpMethod The HTTP method, such as GET or POST. It will default to POST if postVars is set, GET otherwise.
* Overwritten by $postVars['_method'] if present.
* @param string $body The HTTP body
* @param array $headers HTTP headers with key-value pairs
* @return HTTPResponse
*
* @uses getControllerForURL() The rule-lookup logic is handled by this.
* @uses Controller::run() Controller::run() handles the page logic for a Director::direct() call.
*/
static function test($url, $postVars = null, $session = null, $httpMethod = null, $body = null, $headers = null) {
// These are needed so that calling Director::test() doesnt muck with whoever is calling it.
// Really, it's some inapproriate coupling and should be resolved by making less use of statics
$oldStage = Versioned::current_stage();
$getVars = array();
if(!$httpMethod) $httpMethod = ($postVars || is_array($postVars)) ? "POST" : "GET";
if(strpos($url, '?') !== false) {
list($url, $getVarsEncoded) = explode('?', $url, 2);
parse_str($getVarsEncoded, $getVars);
}
if(!$session) $session = new Session(null);
// Back up the current values of the superglobals
$existingRequestVars = $_REQUEST;
$existingGetVars = $_GET;
$existingPostVars = $_POST;
$existingSessionVars = $_SESSION;
$existingCookies = $_COOKIE;
$existingCookieReportErrors = Cookie::report_errors();
Cookie::set_report_errors(false);
$existingRequirementsBackend = Requirements::backend();
Requirements::set_backend(new Requirements_Backend());
// Replace the superglobals with appropriate test values
$_REQUEST = array_merge((array)$getVars, (array)$postVars);
$_GET = (array)$getVars;
$_POST = (array)$postVars;
$_SESSION = $session ? $session->inst_getAll() : array();
$_COOKIE = array();
$req = new HTTPRequest($httpMethod, $url, $getVars, $postVars, $body);
if($headers) foreach($headers as $k => $v) $req->addHeader($k, $v);
$result = Director::handleRequest($req, $session);
// Restore the superglobals
$_REQUEST = $existingRequestVars;
$_GET = $existingGetVars;
$_POST = $existingPostVars;
$_SESSION = $existingSessionVars;
$_COOKIE = $existingCookies;
Cookie::set_report_errors($existingCookieReportErrors);
Requirements::set_backend($existingRequirementsBackend);
// These are needed so that calling Director::test() doesnt muck with whoever is calling it.
// Really, it's some inapproriate coupling and should be resolved by making less use of statics
Versioned::reading_stage($oldStage);
return $result;
}
/**
* Handle an HTTP request, defined with a HTTPRequest object.
*
* @return HTTPResponse|string
*/
protected static function handleRequest(HTTPRequest $request, Session $session) {
krsort(Director::$rules);
if(isset($_REQUEST['debug'])) Debug::show(Director::$rules);
foreach(Director::$rules as $priority => $rules) {
foreach($rules as $pattern => $controllerOptions) {
if(is_string($controllerOptions)) {
if(substr($controllerOptions,0,2) == '->') $controllerOptions = array('Redirect' => substr($controllerOptions,2));
else $controllerOptions = array('Controller' => $controllerOptions);
}
if(($arguments = $request->match($pattern, true)) !== false) {
// controllerOptions provide some default arguments
$arguments = array_merge($controllerOptions, $arguments);
// Find the controller name
if(isset($arguments['Controller'])) $controller = $arguments['Controller'];
// Pop additional tokens from the tokeniser if necessary
if(isset($controllerOptions['_PopTokeniser'])) {
$request->shift($controllerOptions['_PopTokeniser']);
}
// Handle redirections
if(isset($arguments['Redirect'])) {
return "redirect:" . Director::absoluteURL($arguments['Redirect'], true);
} else {
/*
if(isset($arguments['Action'])) {
$arguments['Action'] = str_replace('-','',$arguments['Action']);
}
if(isset($arguments['Action']) && ClassInfo::exists($controller.'_'.$arguments['Action']))
$controller = $controller.'_'.$arguments['Action'];
*/
if(isset($arguments['URLSegment'])) self::$urlSegment = $arguments['URLSegment'] . "/";
Director::$urlParams = $arguments;
$controllerObj = new $controller();
$controllerObj->setSession($session);
return $controllerObj->handleRequest($request);
}
}
}
}
}
/**
* Returns the urlParam with the given name
*/
static function urlParam($name) {
if(isset(Director::$urlParams[$name])) return Director::$urlParams[$name];
}
/**
* Returns an array of urlParams
*/
static function urlParams() {
return Director::$urlParams;
}
/**
* Returns the dataobject of the current page.
* This will only return a value if you are looking at a SiteTree page
*/
static function currentPage() {
if(isset(Director::$urlParams['URLSegment'])) {
$SQL_urlSegment = Convert::raw2sql(Director::$urlParams['URLSegment']);
if (Translatable::is_enabled()) {
return Translatable::get_one("SiteTree", "\"URLSegment\" = '$SQL_urlSegment'");
} else {
return DataObject::get_one("SiteTree", "\"URLSegment\" = '$SQL_urlSegment'");
}
} else {
return Controller::curr();
}
}
/**
* Turns the given URL into an absolute URL.
* @todo Document how relativeToSiteBase works
*/
static function absoluteURL($url, $relativeToSiteBase = false) {
if(strpos($url,'/') === false && !$relativeToSiteBase) $url = dirname($_SERVER['REQUEST_URI'] . 'x') . '/' . $url;
if(substr($url,0,4) != "http") {
if($url[0] != "/") $url = Director::baseURL() . $url;
// Sometimes baseURL() can return a full URL instead of just a path
if(substr($url,0,4) != "http") $url = self::protocolAndHost() . $url;
}
return $url;
}
/**
* Returns the part of the URL, 'http://www.mysite.com'.
*
* @return boolean|string The domain from the PHP environment. Returns FALSE is this environment variable isn't set.
*/
static function protocolAndHost() {
if(self::$alternateBaseURL) {
if(preg_match('/^(http[^:]*:\/\/[^\/]+)(\/|$)/', self::$alternateBaseURL, $matches)) {
return $matches[1];
}
}
$s = (isset($_SERVER['SSL']) || (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off')) ? 's' : '';
if(isset($_SERVER['HTTP_HOST'])) {
return "http$s://" . $_SERVER['HTTP_HOST'];
} else {
global $_FILE_TO_URL_MAPPING;
if(Director::is_cli() && isset($_FILE_TO_URL_MAPPING)) $errorSuggestion = ' You probably want to define '.
'an entry in $_FILE_TO_URL_MAPPING that covers "' . Director::baseFolder() . '"';
else if(Director::is_cli()) $errorSuggestion = ' You probably want to define $_FILE_TO_URL_MAPPING in '.
'your _ss_environment.php as instructed on the "sake" page of the doc.silverstripe.com wiki';
else $errorSuggestion = "";
user_error("Director::protocolAndHost() lacks sufficient information - HTTP_HOST not set.$errorSuggestion", E_USER_WARNING);
return false;
}
}
/**
* Redirect to another page.
* - $url can be an absolute URL
* - or it can be a URL relative to the "site base"
* - if it is just a word without an slashes, then it redirects to another action on the current controller.
*/
static function redirect($url, $code=302) {
Controller::curr()->redirect($url, $code);
}
/**
* Tests whether a redirection has been requested.
* @return string If redirect() has been called, it will return the URL redirected to. Otherwise, it will return null;
*/
static function redirected_to() {
return Controller::curr()->redirectedTo();
}
/**
* Sets the HTTP status code
*/
static function set_status_code($code) {
return Controller::curr()->getResponse()->setStatusCode($code);
}
/**
* Returns the current HTTP status code
*/
static function get_status_code() {
return Controller::curr()->getResponse()->getStatusCode();
}
/**
* @deprecated 2.3 Use Controller->redirectBack()
*/
static function redirectBack() {
Controller::curr()->redirectBack();
}
/**
* Returns a URL to composed of the given segments - usually controller, action, parameter
* @deprecated 2.3 Use Controller::join_links()
*/
static function link() {
$parts = func_get_args();
return Director::baseURL() . implode("/",$parts) . (sizeof($parts) > 2 ? "" : "/");
}
/**
* Returns the root URL for the site.
* It will be automatically calculated unless it is overridden with {@link setBaseURL()}.
*/
static function baseURL() {
if(self::$alternateBaseURL) return self::$alternateBaseURL;
else {
$base = dirname(dirname($_SERVER['SCRIPT_NAME']));
if($base == '/' || $base == '/.' || $base == '\\') return '/';
else return $base . '/';
}
}
/**
* Sets the root URL for the website.
* If the site isn't accessible from the URL you provide, weird things will happen.
*/
static function setBaseURL($baseURL) {
self::$alternateBaseURL = $baseURL;
}
/**
* Returns the root filesystem folder for the site.
* It will be automatically calculated unless it is overridden with {@link setBaseFolder()}.
*/
static function baseFolder() {
if(self::$alternateBaseFolder) return self::$alternateBaseFolder;
else return dirname(dirname($_SERVER['SCRIPT_FILENAME']));
}
/**
* Sets the root folder for the website.
* If the site isn't accessible from the folder you provide, weird things will happen.
*/
static function setBaseFolder($baseFolder) {
self::$alternateBaseFolder = $baseFolder;
}
/**
* Turns an absolute URL or folder into one that's relative to the root of the site.
* This is useful when turning a URL into a filesystem reference, or vice versa.
*/
static function makeRelative($url) {
// Allow for the accidental inclusion of a // in the URL
$url = ereg_replace('([^:])//','\\1/',$url);
// Only bother comparing the URL to the absolute version if $url looks like a URL.
if(preg_match('/^http[^:]*:\/\//',$url)) {
$base1 = self::absoluteBaseURL();
if(substr($url,0,strlen($base1)) == $base1) return substr($url,strlen($base1));
}
$base2 = self::baseFolder();
if(substr($url,0,strlen($base2)) == $base2) return substr($url,strlen($base2));
$base3 = self::baseURL();
if(substr($url,0,strlen($base3)) == $base3) return substr($url,strlen($base3));
return $url;
}
/**
* Returns true if a given path is absolute. Works under both *nix and windows
* systems
*
* @param string $path
* @return bool
*/
public static function is_absolute($path) {
if($path[0] == '/' || $path[0] == '\\') return true;
return preg_match('/^[a-zA-Z]:[\\\\\/]/', $path) == 1;
}
/**
* Given a filesystem reference relative to the site root, return the full file-system path.
*
* @param string $file
* @return string
*/
public static function getAbsFile($file) {
return self::is_absolute($file) ? $file : Director::baseFolder() . '/' . $file;
}
/**
* Returns true if the given file exists.
* @param $file Filename specified relative to the site root
*/
static function fileExists($file) {
// replace any appended query-strings, e.g. /path/to/foo.php?bar=1 to /path/to/foo.php
$file = preg_replace('/([^\?]*)?.*/','$1',$file);
return file_exists(Director::getAbsFile($file));
}
/**
* Returns the Absolute URL of the site root.
*/
static function absoluteBaseURL() {
return Director::absoluteURL(Director::baseURL());
}
/**
* Returns the Absolute URL of the site root, embedding the current basic-auth credentials into the URL.
*/
static function absoluteBaseURLWithAuth() {
$s = "";
$login = "";
if(isset($_SERVER['PHP_AUTH_USER'])) $login = "$_SERVER[PHP_AUTH_USER]:$_SERVER[PHP_AUTH_PW]@";
if(isset($_SERVER['SSL']) && $_SERVER['SSL'] != 'Off') $s = "s";
return "http$s://" . $login . $_SERVER['HTTP_HOST'] . Director::baseURL();
}
/**
* Force the site to run on SSL. To use, call from _config.php.
*
* For example:
* <code>
* if(Director::isLive()) Director::forceSSL();
* </code>
*/
static function forceSSL() {
if((!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] == 'off') && !Director::isDev()) {
$destURL = str_replace('http:', 'https:', Director::absoluteURL($_SERVER['REQUEST_URI']));
header("Location: $destURL", true, 301);
die("<h1>Your browser is not accepting header redirects</h1><p>Please <a href=\"$destURL\">click here</a>");
}
}
/**
* Force a redirect to a domain starting with "www."
*/
static function forceWWW() {
if(!Director::isDev() && !Director::isTest() && strpos($_SERVER['SERVER_NAME'], 'www') !== 0) {
if(isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') {
$destURL = str_replace('https://', 'https://www.', Director::absoluteURL($_SERVER['REQUEST_URI']));
} else {
$destURL = str_replace('http://', 'http://www.', Director::absoluteURL($_SERVER['REQUEST_URI']));
}
header("Location: $destURL", true, 301);
die("<h1>Your browser is not accepting header redirects</h1><p>Please <a href=\"$destURL\">click here</a>");
}
}
/**
* Checks if the current HTTP-Request is an "Ajax-Request"
* by checking for a custom header set by prototype.js or
* wether a manually set request-parameter 'ajax' is present.
*
* @return boolean
*/
static function is_ajax() {
if(Controller::has_curr()) {
return Controller::curr()->isAjax();
} else {
return (
isset($_REQUEST['ajax']) ||
(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == "XMLHttpRequest")
);
}
}
/**
* Returns true if this script is being run from the command line rather than the webserver.
*
* @return boolean
*/
public static function is_cli() {
return (!isset($_SERVER['HTTP_HOST']) && preg_match('/install\.php/', $_SERVER['SCRIPT_NAME']))
|| preg_match('/cli-script\.php/', $_SERVER['SCRIPT_NAME']);
}
////////////////////////////////////////////////////////////////////////////////////////////
// Site mode methods
////////////////////////////////////////////////////////////////////////////////////////////
/**
* Sets the site mode (if it is the public site or the cms), and runs registered modules.
*
* @param string $mode 'site' or 'cms'
*/
static function set_site_mode($mode) {
Director::$siteMode = $mode;
if(isset(self::$callbacks[$mode])) {
foreach(self::$callbacks[$mode] as $extension) {
call_user_func($extension);
}
}
}
/**
* @return string 'site' or 'cms'
*/
static function get_site_mode() {
return Director::$siteMode;
}
/**
* Allows a module to register with the director to be run once
* the controller is instantiated. The optional 'mode' parameter
* can be either 'site' or 'cms', as those are the two values currently
* set by controllers. The callback function will be run at the
* initialization of the relevant controller.
*
* @param $function string PHP-function array based on http://php.net/call_user_func
* @param $mode string
*/
static function add_callback($function, $mode = 'site') {
self::$callbacks[$mode][] = $function;
}
////////////////////////////////////////////////////////////////////////////////////////////
// Environment type methods
////////////////////////////////////////////////////////////////////////////////////////////
/**
* Set the environment type of the current site.
*
* Typically, a SilverStripe site have a number of environments:
* - development environments, such a copy on your local machine.
* - test sites, such as the one you show the client before going live.
* - the live site itself.
*
* The behaviour of these environments often varies slightly. For example, development sites may have errors dumped to the screen,
* and order confirmation emails might be sent to the developer instead of the client.
*
* To help with this, Sapphire support the notion of an environment type. The environment type can be dev, test, or live.
*
* You can set it explicitly with Director::set_environment_tpye(). Or you can use {@link Director::set_dev_servers()} and {@link Director::set_test_servers()}
* to set it implicitly, based on the value of $_SERVER['HTTP_HOST']. If the HTTP_HOST value is one of the servers listed, then
* the environment type will be test or dev. Otherwise, the environment type will be live.
*
* Dev mode can also be forced by putting ?isDev=1 in your URL, which will ask you to log in and then push the site into dev
* mode for the remainder of the session. Putting ?isDev=0 onto the URL can turn it back.
* Generally speaking, these methods will be called from your _config.php file.
*
* Once the environment type is set, it can be checked with {@link Director::isDev()}, {@link Director::isTest()}, and
* {@link Director::isLive()}.
*
* @param $et string The environment type: dev, test, or live.
*/
static function set_environment_type($et) {
if($et != 'dev' && $et != 'test' && $et != 'live') {
Debug::backtrace();
user_error("Director::set_environment_type passed '$et'. It should be passed dev, test, or live", E_USER_WARNING);
} else {
self::$environment_type = $et;
}
}
/**
* Can also be checked with {@link Director::isDev()}, {@link Director::isTest()}, and {@link Director::isLive()}.
*
* @return string 'dev', 'test' or 'live'
*/
static function get_environment_type() {
if(Director::isLive()) {
return 'live';
} elseif(Director::isTest()) {
return 'test';
} elseif(Director::isDev()) {
return 'dev';
} else {
return false;
}
}
/**
* Specify HTTP_HOST values that are development environments.
* For information about environment types, see {@link Director::set_environment_type()}.
* @param $servers array An array of HTTP_HOST values that should be treated as development environments.
*/
static function set_dev_servers($servers) {
Director::$dev_servers = $servers;
}
/**
* Specify HTTP_HOST values that are test environments.
* For information about environment types, see {@link Director::set_environment_type()}.
* @param $servers array An array of HTTP_HOST values that should be treated as test environments.
*/
static function set_test_servers($servers) {
Director::$test_servers = $servers;
}
/*
* This function will return true if the site is in a live environment.
* For information about environment types, see {@link Director::set_environment_type()}.
*/
static function isLive() {
return !(Director::isDev() || Director::isTest());
}
/**
* This function will return true if the site is in a development environment.
* For information about environment types, see {@link Director::set_environment_type()}.
*/
static function isDev() {
// Use ?isDev=1 to get development access on the live server
if(isset($_GET['isDev'])) {
if(Security::database_is_ready()) {
BasicAuth::requireLogin("SilverStripe developer access. Use your CMS login", "ADMIN");
$_SESSION['isDev'] = $_GET['isDev'];
} else {
return true;
}
}
if(isset($_SESSION['isDev']) && $_SESSION['isDev']) return true;
if(self::$environment_type) return self::$environment_type == 'dev';
// Check if we are running on one of the development servers
if(isset($_SERVER['HTTP_HOST']) && in_array($_SERVER['HTTP_HOST'], Director::$dev_servers)) {
return true;
}
/*
// Check if we are running on one of the test servers
if(in_array($_SERVER['HTTP_HOST'], Director::$test_servers)) {
return true;
}
*/
return false;
}
/**
* This function will return true if the site is in a test environment.
* For information about environment types, see {@link Director::set_environment_type()}.
*/
static function isTest() {
if(self::isDev()) return false;
if(self::$environment_type) {
return self::$environment_type == 'test';
}
// Check if we are running on one of the test servers
if(isset($_SERVER['HTTP_HOST']) && in_array($_SERVER['HTTP_HOST'], Director::$test_servers)) {
return true;
}
return false;
}
}
?>