mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
906 lines
24 KiB
PHP
906 lines
24 KiB
PHP
<?php
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namespace SilverStripe\Control;
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use ArrayAccess;
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use BadMethodCallException;
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use InvalidArgumentException;
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use SilverStripe\Core\ClassInfo;
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use SilverStripe\ORM\ArrayLib;
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/**
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* Represents a HTTP-request, including a URL that is tokenised for parsing, and a request method
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* (GET/POST/PUT/DELETE). This is used by {@link RequestHandler} objects to decide what to do.
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*
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* Caution: objects of this class are immutable, e.g. echo $request['a']; works as expected,
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* but $request['a'] = '1'; has no effect.
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*
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* The intention is that a single HTTPRequest object can be passed from one object to another, each object calling
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* match() to get the information that they need out of the URL. This is generally handled by
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* {@link RequestHandler::handleRequest()}.
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*
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* @todo Accept X_HTTP_METHOD_OVERRIDE http header and $_REQUEST['_method'] to override request types (useful for
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* webclients not supporting PUT and DELETE)
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*/
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class HTTPRequest implements ArrayAccess
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{
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/**
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* @var string
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*/
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protected $url;
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/**
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* The non-extension parts of the passed URL as an array, originally exploded by the "/" separator.
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* All elements of the URL are loaded in here,
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* and subsequently popped out of the array by {@link shift()}.
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* Only use this structure for internal request handling purposes.
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*
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* @var array
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*/
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protected $dirParts;
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/**
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* The URL extension (if present)
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*
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* @var string
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*/
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protected $extension;
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/**
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* The HTTP method in all uppercase: GET/PUT/POST/DELETE/HEAD
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*
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* @var string
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*/
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protected $httpMethod;
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/**
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* The URL scheme in lowercase: http or https
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*
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* @var string
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*/
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protected $scheme;
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/**
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* The client IP address
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*
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* @var string
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*/
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protected $ip;
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/**
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* Contains alls HTTP GET parameters passed into this request.
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*
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* @var array
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*/
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protected $getVars = array();
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/**
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* Contains alls HTTP POST parameters passed into this request.
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*
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* @var array
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*/
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protected $postVars = array();
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/**
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* HTTP Headers like "Content-Type: text/xml"
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*
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* @see http://en.wikipedia.org/wiki/List_of_HTTP_headers
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* @var array
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*/
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protected $headers = array();
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/**
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* Raw HTTP body, used by PUT and POST requests.
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*
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* @var string
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*/
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protected $body;
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/**
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* Contains an associative array of all
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* arguments matched in all calls to {@link RequestHandler->handleRequest()}.
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* It's a "historical record" that's specific to the current call of
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* {@link handleRequest()}, and is only complete once the "last call" to that method is made.
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*
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* @var array
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*/
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protected $allParams = array();
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/**
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* Contains an associative array of all
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* arguments matched in the current call from {@link RequestHandler->handleRequest()},
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* as denoted with a "$"-prefix in the $url_handlers definitions.
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* Contains different states throughout its lifespan, so just useful
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* while processed in {@link RequestHandler} and to get the last
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* processes arguments.
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*
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* @var array
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*/
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protected $latestParams = array();
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/**
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* Contains an associative array of all arguments
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* explicitly set in the route table for the current request.
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* Useful for passing generic arguments via custom routes.
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*
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* E.g. The "Locale" parameter would be assigned "en_NZ" below
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*
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* Director:
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* rules:
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* 'en_NZ/$URLSegment!//$Action/$ID/$OtherID':
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* Controller: 'ModelAsController'
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* Locale: 'en_NZ'
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*
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* @var array
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*/
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protected $routeParams = array();
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/**
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* @var int
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*/
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protected $unshiftedButParsedParts = 0;
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/**
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* @var Session
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*/
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protected $session;
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/**
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* Construct a HTTPRequest from a URL relative to the site root.
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*
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* @param string $httpMethod
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* @param string $url
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* @param array $getVars
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* @param array $postVars
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* @param string $body
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*/
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public function __construct($httpMethod, $url, $getVars = array(), $postVars = array(), $body = null)
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{
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$this->httpMethod = strtoupper(self::detect_method($httpMethod, $postVars));
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$this->setUrl($url);
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$this->getVars = (array) $getVars;
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$this->postVars = (array) $postVars;
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$this->body = $body;
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$this->scheme = "http";
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}
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/**
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* Allow the setting of a URL
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*
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* This is here so that RootURLController can change the URL of the request
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* without us loosing all the other info attached (like headers)
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*
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* @param string $url The new URL
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* @return HTTPRequest The updated request
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*/
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public function setUrl($url)
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{
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$this->url = $url;
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// Normalize URL if its relative (strictly speaking), or has leading slashes
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if (Director::is_relative_url($url) || preg_match('/^\//', $url)) {
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$this->url = preg_replace(array('/\/+/','/^\//', '/\/$/'), array('/','',''), $this->url);
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}
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if (preg_match('/^(.*)\.([A-Za-z][A-Za-z0-9]*)$/', $this->url, $matches)) {
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$this->url = $matches[1];
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$this->extension = $matches[2];
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}
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if ($this->url) {
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$this->dirParts = preg_split('|/+|', $this->url);
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} else {
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$this->dirParts = array();
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}
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return $this;
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}
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/**
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* @return bool
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*/
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public function isGET()
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{
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return $this->httpMethod == 'GET';
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}
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/**
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* @return bool
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*/
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public function isPOST()
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{
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return $this->httpMethod == 'POST';
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}
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/**
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* @return bool
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*/
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public function isPUT()
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{
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return $this->httpMethod == 'PUT';
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}
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/**
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* @return bool
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*/
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public function isDELETE()
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{
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return $this->httpMethod == 'DELETE';
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}
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/**
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* @return bool
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*/
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public function isHEAD()
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{
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return $this->httpMethod == 'HEAD';
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}
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/**
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* @param string $body
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* @return HTTPRequest $this
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*/
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public function setBody($body)
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{
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$this->body = $body;
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return $this;
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}
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/**
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* @return null|string
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*/
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public function getBody()
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{
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return $this->body;
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}
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/**
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* @return array
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*/
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public function getVars()
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{
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return $this->getVars;
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}
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/**
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* @return array
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*/
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public function postVars()
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{
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return $this->postVars;
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}
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/**
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* Returns all combined HTTP GET and POST parameters
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* passed into this request. If a parameter with the same
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* name exists in both arrays, the POST value is returned.
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*
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* @return array
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*/
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public function requestVars()
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{
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return ArrayLib::array_merge_recursive($this->getVars, $this->postVars);
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}
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/**
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* @param string $name
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* @return mixed
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*/
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public function getVar($name)
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{
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if (isset($this->getVars[$name])) {
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return $this->getVars[$name];
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}
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return null;
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}
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/**
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* @param string $name
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* @return mixed
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*/
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public function postVar($name)
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{
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if (isset($this->postVars[$name])) {
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return $this->postVars[$name];
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}
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return null;
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}
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/**
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* @param string $name
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* @return mixed
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*/
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public function requestVar($name)
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{
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if (isset($this->postVars[$name])) {
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return $this->postVars[$name];
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}
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if (isset($this->getVars[$name])) {
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return $this->getVars[$name];
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}
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return null;
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}
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/**
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* Returns a possible file extension found in parsing the URL
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* as denoted by a "."-character near the end of the URL.
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* Doesn't necessarily have to belong to an existing file,
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* as extensions can be also used for content-type-switching.
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*
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* @return string
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*/
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public function getExtension()
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{
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return $this->extension;
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}
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/**
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* Checks if the {@link HTTPRequest->getExtension()} on this request matches one of the more common media types
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* embedded into a webpage - e.g. css, png.
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*
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* This is useful for things like determining whether to display a fully rendered error page or not. Note that the
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* media file types is not at all comprehensive.
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*
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* @return bool
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*/
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public function isMedia()
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{
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return in_array($this->getExtension(), array('css', 'js', 'jpg', 'jpeg', 'gif', 'png', 'bmp', 'ico'));
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}
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/**
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* Add a HTTP header to the response, replacing any header of the same name.
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*
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* @param string $header Example: "content-type"
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* @param string $value Example: "text/xml"
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*/
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public function addHeader($header, $value)
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{
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$header = strtolower($header);
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$this->headers[$header] = $value;
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return $this;
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}
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/**
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* @return array
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*/
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public function getHeaders()
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{
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return $this->headers;
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}
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/**
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* Remove an existing HTTP header
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*
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* @param string $header
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* @return mixed
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*/
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public function getHeader($header)
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{
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$header = strtolower($header);
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return (isset($this->headers[$header])) ? $this->headers[$header] : null;
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}
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/**
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* Remove an existing HTTP header by its name,
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* e.g. "Content-Type".
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*
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* @param string $header
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* @return HTTPRequest $this
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*/
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public function removeHeader($header)
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{
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$header = strtolower($header);
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unset($this->headers[$header]);
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return $this;
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}
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/**
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* Returns the URL used to generate the page
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*
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* @param bool $includeGetVars whether or not to include the get parameters\
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* @return string
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*/
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public function getURL($includeGetVars = false)
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{
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$url = ($this->getExtension()) ? $this->url . '.' . $this->getExtension() : $this->url;
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if ($includeGetVars) {
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$vars = $this->getVars();
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if (count($vars)) {
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$url .= '?' . http_build_query($vars);
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}
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} elseif (strpos($url, "?") !== false) {
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$url = substr($url, 0, strpos($url, "?"));
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}
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return $url;
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}
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/**
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* Returns true if this request an ajax request,
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* based on custom HTTP ajax added by common JavaScript libraries,
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* or based on an explicit "ajax" request parameter.
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*
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* @return boolean
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*/
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public function isAjax()
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{
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return (
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$this->requestVar('ajax') ||
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$this->getHeader('x-requested-with') === "XMLHttpRequest"
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);
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}
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/**
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* Enables the existence of a key-value pair in the request to be checked using
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* array syntax, so isset($request['title']) will check for $_POST['title'] and $_GET['title']
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*
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* @param string $offset
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* @return bool
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*/
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public function offsetExists($offset)
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{
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return isset($this->postVars[$offset]) || isset($this->getVars[$offset]);
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}
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/**
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* Access a request variable using array syntax. eg: $request['title'] instead of $request->postVar('title')
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*
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* @param string $offset
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* @return mixed
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*/
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public function offsetGet($offset)
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{
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return $this->requestVar($offset);
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}
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public function offsetSet($offset, $value)
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{
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$this->getVars[$offset] = $value;
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}
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public function offsetUnset($offset)
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{
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unset($this->getVars[$offset]);
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unset($this->postVars[$offset]);
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}
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/**
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* Construct an HTTPResponse that will deliver a file to the client.
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* Caution: Since it requires $fileData to be passed as binary data (no stream support),
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* it's only advisable to send small files through this method.
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*
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* @static
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* @param $fileData
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* @param $fileName
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* @param null $mimeType
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* @return HTTPResponse
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*/
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public static function send_file($fileData, $fileName, $mimeType = null)
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{
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if (!$mimeType) {
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$mimeType = HTTP::get_mime_type($fileName);
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}
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$response = new HTTPResponse($fileData);
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$response->addHeader("content-type", "$mimeType; name=\"" . addslashes($fileName) . "\"");
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// Note a IE-only fix that inspects this header in HTTP::add_cache_headers().
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$response->addHeader("content-disposition", "attachment; filename=\"" . addslashes($fileName) . "\"");
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$response->addHeader("content-length", strlen($fileData));
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return $response;
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}
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/**
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* Matches a URL pattern
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* The pattern can contain a number of segments, separated by / (and an extension indicated by a .)
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*
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* The parts can be either literals, or, if they start with a $ they are interpreted as variables.
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* - Literals must be provided in order to match
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* - $Variables are optional
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* - However, if you put ! at the end of a variable, then it becomes mandatory.
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*
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* For example:
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* - admin/crm/list will match admin/crm/$Action/$ID/$OtherID, but it won't match admin/crm/$Action!/$ClassName!
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*
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* The pattern can optionally start with an HTTP method and a space. For example, "POST $Controller/$Action".
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* This is used to define a rule that only matches on a specific HTTP method.
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*
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* @param $pattern
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* @param bool $shiftOnSuccess
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* @return array|bool
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*/
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public function match($pattern, $shiftOnSuccess = false)
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{
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// Check if a specific method is required
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if (preg_match('/^([A-Za-z]+) +(.*)$/', $pattern, $matches)) {
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$requiredMethod = $matches[1];
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if ($requiredMethod != $this->httpMethod) {
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return false;
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}
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// If we get this far, we can match the URL pattern as usual.
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$pattern = $matches[2];
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}
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// Special case for the root URL controller
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if (!$pattern) {
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return ($this->dirParts == array()) ? array('Matched' => true) : false;
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}
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// Check for the '//' marker that represents the "shifting point"
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$doubleSlashPoint = strpos($pattern, '//');
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if ($doubleSlashPoint !== false) {
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$shiftCount = substr_count(substr($pattern, 0, $doubleSlashPoint), '/') + 1;
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$pattern = str_replace('//', '/', $pattern);
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$patternParts = explode('/', $pattern);
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} else {
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$patternParts = explode('/', $pattern);
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$shiftCount = sizeof($patternParts);
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}
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// Filter out any "empty" matching parts - either from an initial / or a trailing /
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$patternParts = array_values(array_filter($patternParts));
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$arguments = array();
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foreach ($patternParts as $i => $part) {
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$part = trim($part);
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// Match a variable
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if (isset($part[0]) && $part[0] == '$') {
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// A variable ending in ! is required
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if (substr($part, -1) == '!') {
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$varRequired = true;
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$varName = substr($part, 1, -1);
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} else {
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$varRequired = false;
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$varName = substr($part, 1);
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}
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// Fail if a required variable isn't populated
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if ($varRequired && !isset($this->dirParts[$i])) {
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return false;
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}
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/** @skipUpgrade */
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$key = "Controller";
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$arguments[$varName] = isset($this->dirParts[$i]) ? $this->dirParts[$i] : null;
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if ($part == '$Controller'
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&& (
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!ClassInfo::exists($arguments[$key])
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|| !is_subclass_of($arguments[$key], 'SilverStripe\\Control\\Controller')
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)
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) {
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return false;
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}
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// Literal parts with extension
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} elseif (isset($this->dirParts[$i]) && $this->dirParts[$i] . '.' . $this->extension == $part) {
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continue;
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// Literal parts must always be there
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} elseif (!isset($this->dirParts[$i]) || $this->dirParts[$i] != $part) {
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return false;
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|
}
|
|
}
|
|
|
|
if ($shiftOnSuccess) {
|
|
$this->shift($shiftCount);
|
|
// We keep track of pattern parts that we looked at but didn't shift off.
|
|
// This lets us say that we have *parsed* the whole URL even when we haven't *shifted* it all
|
|
$this->unshiftedButParsedParts = sizeof($patternParts) - $shiftCount;
|
|
}
|
|
|
|
$this->latestParams = $arguments;
|
|
|
|
// Load the arguments that actually have a value into $this->allParams
|
|
// This ensures that previous values aren't overridden with blanks
|
|
foreach ($arguments as $k => $v) {
|
|
if ($v || !isset($this->allParams[$k])) {
|
|
$this->allParams[$k] = $v;
|
|
}
|
|
}
|
|
|
|
if ($arguments === array()) {
|
|
$arguments['_matched'] = true;
|
|
}
|
|
return $arguments;
|
|
}
|
|
|
|
/**
|
|
* @return array
|
|
*/
|
|
public function allParams()
|
|
{
|
|
return $this->allParams;
|
|
}
|
|
|
|
/**
|
|
* Shift all the parameter values down a key space, and return the shifted value.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function shiftAllParams()
|
|
{
|
|
$keys = array_keys($this->allParams);
|
|
$values = array_values($this->allParams);
|
|
$value = array_shift($values);
|
|
|
|
// push additional unparsed URL parts onto the parameter stack
|
|
if (array_key_exists($this->unshiftedButParsedParts, $this->dirParts)) {
|
|
$values[] = $this->dirParts[$this->unshiftedButParsedParts];
|
|
}
|
|
|
|
foreach ($keys as $position => $key) {
|
|
$this->allParams[$key] = isset($values[$position]) ? $values[$position] : null;
|
|
}
|
|
|
|
return $value;
|
|
}
|
|
|
|
/**
|
|
* @return array
|
|
*/
|
|
public function latestParams()
|
|
{
|
|
return $this->latestParams;
|
|
}
|
|
|
|
/**
|
|
* @param string $name
|
|
* @return string|null
|
|
*/
|
|
public function latestParam($name)
|
|
{
|
|
if (isset($this->latestParams[$name])) {
|
|
return $this->latestParams[$name];
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return array
|
|
*/
|
|
public function routeParams()
|
|
{
|
|
return $this->routeParams;
|
|
}
|
|
|
|
/**
|
|
* @param $params
|
|
* @return HTTPRequest $this
|
|
*/
|
|
public function setRouteParams($params)
|
|
{
|
|
$this->routeParams = $params;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* @return array
|
|
*/
|
|
public function params()
|
|
{
|
|
return array_merge($this->allParams, $this->routeParams);
|
|
}
|
|
|
|
/**
|
|
* Finds a named URL parameter (denoted by "$"-prefix in $url_handlers)
|
|
* from the full URL, or a parameter specified in the route table
|
|
*
|
|
* @param string $name
|
|
* @return string Value of the URL parameter (if found)
|
|
*/
|
|
public function param($name)
|
|
{
|
|
$params = $this->params();
|
|
if (isset($params[$name])) {
|
|
return $params[$name];
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the unparsed part of the original URL
|
|
* separated by commas. This is used by {@link RequestHandler->handleRequest()}
|
|
* to determine if further URL processing is necessary.
|
|
*
|
|
* @return string Partial URL
|
|
*/
|
|
public function remaining()
|
|
{
|
|
return implode("/", $this->dirParts);
|
|
}
|
|
|
|
/**
|
|
* Returns true if this is a URL that will match without shifting off any of the URL.
|
|
* This is used by the request handler to prevent infinite parsing loops.
|
|
*
|
|
* @param string $pattern
|
|
* @return bool
|
|
*/
|
|
public function isEmptyPattern($pattern)
|
|
{
|
|
if (preg_match('/^([A-Za-z]+) +(.*)$/', $pattern, $matches)) {
|
|
$pattern = $matches[2];
|
|
}
|
|
|
|
if (trim($pattern) == "") {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Shift one or more parts off the beginning of the URL.
|
|
* If you specify shifting more than 1 item off, then the items will be returned as an array
|
|
*
|
|
* @param int $count Shift Count
|
|
* @return string|array
|
|
*/
|
|
public function shift($count = 1)
|
|
{
|
|
$return = array();
|
|
|
|
if ($count == 1) {
|
|
return array_shift($this->dirParts);
|
|
}
|
|
|
|
for ($i=0; $i<$count; $i++) {
|
|
$value = array_shift($this->dirParts);
|
|
|
|
if ($value === null) {
|
|
break;
|
|
}
|
|
|
|
$return[] = $value;
|
|
}
|
|
|
|
return $return;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the URL has been completely parsed.
|
|
* This will respect parsed but unshifted directory parts.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function allParsed()
|
|
{
|
|
return sizeof($this->dirParts) <= $this->unshiftedButParsedParts;
|
|
}
|
|
|
|
/**
|
|
* @return string Return the host from the request
|
|
*/
|
|
public function getHost()
|
|
{
|
|
return $this->getHeader('host');
|
|
}
|
|
|
|
/**
|
|
* Returns the client IP address which originated this request.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getIP()
|
|
{
|
|
return $this->ip;
|
|
}
|
|
|
|
/**
|
|
* Sets the client IP address which originated this request.
|
|
* Use setIPFromHeaderValue if assigning from header value.
|
|
*
|
|
* @param $ip string
|
|
* @return $this
|
|
*/
|
|
public function setIP($ip)
|
|
{
|
|
if (!filter_var($ip, FILTER_VALIDATE_IP)) {
|
|
throw new InvalidArgumentException("Invalid ip $ip");
|
|
}
|
|
$this->ip = $ip;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Returns all mimetypes from the HTTP "Accept" header
|
|
* as an array.
|
|
*
|
|
* @param boolean $includeQuality Don't strip away optional "quality indicators", e.g. "application/xml;q=0.9"
|
|
* (Default: false)
|
|
* @return array
|
|
*/
|
|
public function getAcceptMimetypes($includeQuality = false)
|
|
{
|
|
$mimetypes = array();
|
|
$mimetypesWithQuality = preg_split('#\s*,\s*#', $this->getHeader('accept'));
|
|
foreach ($mimetypesWithQuality as $mimetypeWithQuality) {
|
|
$mimetypes[] = ($includeQuality) ? $mimetypeWithQuality : preg_replace('/;.*/', '', $mimetypeWithQuality);
|
|
}
|
|
return $mimetypes;
|
|
}
|
|
|
|
/**
|
|
* @return string HTTP method (all uppercase)
|
|
*/
|
|
public function httpMethod()
|
|
{
|
|
return $this->httpMethod;
|
|
}
|
|
|
|
/**
|
|
* Return the URL scheme (e.g. "http" or "https").
|
|
* Equivalent to PSR-7 getUri()->getScheme()
|
|
*
|
|
* @return string
|
|
*/
|
|
public function getScheme()
|
|
{
|
|
return $this->scheme;
|
|
}
|
|
|
|
/**
|
|
* Set the URL scheme (e.g. "http" or "https").
|
|
* Equivalent to PSR-7 getUri()->getScheme(),
|
|
*
|
|
* @param string $scheme
|
|
* @return $this
|
|
*/
|
|
public function setScheme($scheme)
|
|
{
|
|
$this->scheme = $scheme;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Gets the "real" HTTP method for a request.
|
|
*
|
|
* Used to work around browser limitations of form
|
|
* submissions to GET and POST, by overriding the HTTP method
|
|
* with a POST parameter called "_method" for PUT, DELETE, HEAD.
|
|
* Using GET for the "_method" override is not supported,
|
|
* as GET should never carry out state changes.
|
|
* Alternatively you can use a custom HTTP header 'X-HTTP-Method-Override'
|
|
* to override the original method.
|
|
* The '_method' POST parameter overrules the custom HTTP header.
|
|
*
|
|
* @param string $origMethod Original HTTP method from the browser request
|
|
* @param array $postVars
|
|
* @return string HTTP method (all uppercase)
|
|
*/
|
|
public static function detect_method($origMethod, $postVars)
|
|
{
|
|
if (isset($postVars['_method'])) {
|
|
if (!in_array(strtoupper($postVars['_method']), array('GET','POST','PUT','DELETE','HEAD'))) {
|
|
user_error('HTTPRequest::detect_method(): Invalid "_method" parameter', E_USER_ERROR);
|
|
}
|
|
return strtoupper($postVars['_method']);
|
|
} else {
|
|
return $origMethod;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @return Session
|
|
*/
|
|
public function getSession()
|
|
{
|
|
if (empty($this->session)) {
|
|
throw new BadMethodCallException("No session available for this HTTPRequest");
|
|
}
|
|
return $this->session;
|
|
}
|
|
|
|
/**
|
|
* @param Session $session
|
|
* @return $this
|
|
*/
|
|
public function setSession(Session $session)
|
|
{
|
|
$this->session = $session;
|
|
return $this;
|
|
}
|
|
}
|