www.gusucode.com > 24Beta 虚拟主机版 1.0.0 Beta源码程序 > 24Beta 虚拟主机版 1.0.0 Beta源码程序/24Beta-1.0.0-vhost/library/framework/web/CHttpRequest.php
<?php
/**
* CHttpRequest and CCookieCollection class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2009 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CHttpRequest encapsulates the $_SERVER variable and resolves its inconsistency among different Web servers.
*
* CHttpRequest also manages the cookies sent from and sent to the user.
* By setting {@link enableCookieValidation} to true,
* cookies sent from the user will be validated to see if they are tampered.
* The property {@link getCookies cookies} returns the collection of cookies.
* For more details, see {@link CCookieCollection}.
*
* CHttpRequest is a default application component loaded by {@link CWebApplication}. It can be
* accessed via {@link CWebApplication::getRequest()}.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CHttpRequest.php 1283 2009-08-01 01:21:38Z qiang.xue $
* @package system.web
* @since 1.0
*/
class CHttpRequest extends CApplicationComponent
{
/**
* @var boolean whether cookies should be validated to ensure they are not tampered. Defaults to false.
*/
public $enableCookieValidation=false;
/**
* @var boolean whether to enable CSRF (Cross-Site Request Forgery) validation. Defaults to false.
* By setting this property to true, forms submitted to an Yii Web application must be originated
* from the same application. If not, a 400 HTTP exception will be raised.
* Note, this feature requires that the user client accepts cookie.
* You also need to use {@link CHtml::form} or {@link CHtml::statefulForm} to generate
* the needed HTML forms in your pages.
* @see http://freedom-to-tinker.com/sites/default/files/csrf.pdf
*/
public $enableCsrfValidation=false;
/**
* @var string the name of the token used to prevent CSRF. Defaults to 'YII_CSRF_TOKEN'.
* This property is effectively only when {@link enableCsrfValidation} is true.
*/
public $csrfTokenName='YII_CSRF_TOKEN';
/**
* @var array the property values (in name-value pairs) used to initialize the CSRF cookie.
* Any property of {@link CHttpCookie} may be initialized.
* This property is effective only when {@link enableCsrfValidation} is true.
*/
public $csrfCookie;
private $_requestUri;
private $_pathInfo;
private $_scriptFile;
private $_scriptUrl;
private $_hostInfo;
private $_url;
private $_baseUrl;
private $_cookies;
private $_preferredLanguage;
private $_csrfToken;
/**
* Initializes the application component.
* This method overrides the parent implementation by preprocessing
* the user request data.
*/
public function init()
{
parent::init();
$this->normalizeRequest();
}
/**
* Normalizes the request data.
* This method strips off slashes in request data if get_magic_quotes_gpc() returns true.
* It also performs CSRF validation if {@link enableCsrfValidation} is true.
*/
protected function normalizeRequest()
{
// normalize request
if(get_magic_quotes_gpc())
{
if(isset($_GET))
$_GET=$this->stripSlashes($_GET);
if(isset($_POST))
$_POST=$this->stripSlashes($_POST);
if(isset($_REQUEST))
$_REQUEST=$this->stripSlashes($_REQUEST);
if(isset($_COOKIE))
$_COOKIE=$this->stripSlashes($_COOKIE);
}
if($this->enableCsrfValidation)
Yii::app()->attachEventHandler('onBeginRequest',array($this,'validateCsrfToken'));
}
/**
* Strips slashes from input data.
* This method is applied when magic quotes is enabled.
* @param mixed input data to be processed
* @return mixed processed data
*/
public function stripSlashes(&$data)
{
return is_array($data)?array_map(array($this,'stripSlashes'),$data):stripslashes($data);
}
/**
* Returns the named GET or POST parameter value.
* If the GET or POST parameter does not exist, the second parameter to this method will be returned.
* If both GET and POST contains such a named parameter, the GET parameter takes precedence.
* @param string the GET parameter name
* @param mixed the default parameter value if the GET parameter does not exist.
* @return mixed the GET parameter value
* @since 1.0.4
* @see getQuery
* @see getPost
*/
public function getParam($name,$defaultValue=null)
{
return isset($_GET[$name]) ? $_GET[$name] : (isset($_POST[$name]) ? $_POST[$name] : $defaultValue);
}
/**
* Returns the named GET parameter value.
* If the GET parameter does not exist, the second parameter to this method will be returned.
* @param string the GET parameter name
* @param mixed the default parameter value if the GET parameter does not exist.
* @return mixed the GET parameter value
* @since 1.0.4
* @see getPost
* @see getParam
*/
public function getQuery($name,$defaultValue=null)
{
return isset($_GET[$name]) ? $_GET[$name] : $defaultValue;
}
/**
* Returns the named POST parameter value.
* If the POST parameter does not exist, the second parameter to this method will be returned.
* @param string the POST parameter name
* @param mixed the default parameter value if the POST parameter does not exist.
* @return mixed the POST parameter value
* @since 1.0.4
* @see getParam
* @see getQuery
*/
public function getPost($name,$defaultValue=null)
{
return isset($_POST[$name]) ? $_POST[$name] : $defaultValue;
}
/**
* @return string part of the request URL after the host info.
* It consists of the following parts:
* <ul>
* <li>{@link getScriptUrl scriptUrl}</li>
* <li>{@link getPathInfo pathInfo}</li>
* <li>{@link getQueryString queryString}</li>
* </ul>
*/
public function getUrl()
{
if($this->_url!==null)
return $this->_url;
else
{
if(isset($_SERVER['REQUEST_URI']))
$this->_url=$_SERVER['REQUEST_URI'];
else
{
$this->_url=$this->getScriptUrl();
if(($pathInfo=$this->getPathInfo())!=='')
$this->_url.='/'.$pathInfo;
if(($queryString=$this->getQueryString())!=='')
$this->_url.='?'.$queryString;
}
return $this->_url;
}
}
/**
* Returns the schema and host part of the application URL.
* The returned URL does not have an ending slash.
* By default this is determined based on the user request information.
* You may explicitly specify it by setting the {@link setHostInfo hostInfo} property.
* @param string schema to use (e.g. http, https). If empty, the schema used for the current request will be used.
* @return string schema and hostname part (with port number if needed) of the request URL (e.g. http://www.yiiframework.com)
* @see setHostInfo
*/
public function getHostInfo($schema='')
{
if($this->_hostInfo===null)
{
if($secure=$this->getIsSecureConnection())
$http='https';
else
$http='http';
if(isset($_SERVER['HTTP_HOST']))
$this->_hostInfo=$http.'://'.$_SERVER['HTTP_HOST'];
else
{
$this->_hostInfo=$http.'://'.$_SERVER['SERVER_NAME'];
$port=$_SERVER['SERVER_PORT'];
if(($port!=80 && !$secure) || ($port!=443 && $secure))
$this->_hostInfo.=':'.$port;
}
}
if($schema!=='' && ($pos=strpos($this->_hostInfo,':'))!==false)
return $schema.substr($this->_hostInfo,$pos);
else
return $this->_hostInfo;
}
/**
* Sets the schema and host part of the application URL.
* This setter is provided in case the schema and hostname cannot be determined
* on certain Web servers.
* @param string the schema and host part of the application URL.
*/
public function setHostInfo($value)
{
$this->_hostInfo=rtrim($value,'/');
}
/**
* Returns the relative URL for the application.
* This is similar to {@link getScriptUrl scriptUrl} except that
* it does not have the script file name, and the ending slashes are stripped off.
* @param boolean whether to return an absolute URL. Defaults to false, meaning returning a relative one.
* This parameter has been available since 1.0.2.
* @return string the relative URL for the application
* @see setScriptUrl
*/
public function getBaseUrl($absolute=false)
{
if($this->_baseUrl===null)
$this->_baseUrl=rtrim(dirname($this->getScriptUrl()),'\\/');
return $absolute ? $this->getHostInfo() . $this->_baseUrl : $this->_baseUrl;
}
/**
* Sets the relative URL for the application.
* By default the URL is determined based on the entry script URL.
* This setter is provided in case you want to change this behavior.
* @param string the relative URL for the application
*/
public function setBaseUrl($value)
{
$this->_baseUrl=$value;
}
/**
* Returns the relative URL of the entry script.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string the relative URL of the entry script.
*/
public function getScriptUrl()
{
if($this->_scriptUrl===null)
{
$scriptName=basename($_SERVER['SCRIPT_FILENAME']);
if(basename($_SERVER['SCRIPT_NAME'])===$scriptName)
$this->_scriptUrl=$_SERVER['SCRIPT_NAME'];
else if(basename($_SERVER['PHP_SELF'])===$scriptName)
$this->_scriptUrl=$_SERVER['PHP_SELF'];
else if(isset($_SERVER['ORIG_SCRIPT_NAME']) && basename($_SERVER['ORIG_SCRIPT_NAME'])===$scriptName)
$this->_scriptUrl=$_SERVER['ORIG_SCRIPT_NAME'];
else if(($pos=strpos($_SERVER['PHP_SELF'],'/'.$scriptName))!==false)
$this->_scriptUrl=substr($_SERVER['SCRIPT_NAME'],0,$pos).'/'.$scriptName;
else if(isset($_SERVER['DOCUMENT_ROOT']) && strpos($_SERVER['SCRIPT_FILENAME'],$_SERVER['DOCUMENT_ROOT'])===0)
$this->_scriptUrl=str_replace('\\','/',str_replace($_SERVER['DOCUMENT_ROOT'],'',$_SERVER['SCRIPT_FILENAME']));
else
throw new CException(Yii::t('yii','CHttpRequest is unable to determine the entry script URL.'));
}
return $this->_scriptUrl;
}
/**
* Sets the relative URL for the application entry script.
* This setter is provided in case the entry script URL cannot be determined
* on certain Web servers.
* @param string the relative URL for the application entry script.
*/
public function setScriptUrl($value)
{
$this->_scriptUrl='/'.trim($value,'/');
}
/**
* Returns the path info of the currently requested URL.
* This refers to the part that is after the entry script and before the question mark.
* The starting and ending slashes are stripped off.
* @return string part of the request URL that is after the entry script and before the question mark.
* @throws CException if the request URI cannot be determined due to improper server configuration
*/
public function getPathInfo()
{
if($this->_pathInfo===null)
{
$requestUri=$this->getRequestUri();
$scriptUrl=$this->getScriptUrl();
$baseUrl=$this->getBaseUrl();
if(strpos($requestUri,$scriptUrl)===0)
$pathInfo=substr($requestUri,strlen($scriptUrl));
else if($baseUrl==='' || strpos($requestUri,$baseUrl)===0)
$pathInfo=substr($requestUri,strlen($baseUrl));
else if(strpos($_SERVER['PHP_SELF'],$scriptUrl)===0)
$pathInfo=substr($_SERVER['PHP_SELF'],strlen($scriptUrl));
else
throw new CException(Yii::t('yii','CHttpRequest is unable to determine the path info of the request.'));
if(($pos=strpos($pathInfo,'?'))!==false)
$pathInfo=substr($pathInfo,0,$pos);
$this->_pathInfo=trim($pathInfo,'/');
}
return $this->_pathInfo;
}
/**
* Returns the request URI portion for the currently requested URL.
* This refers to the portion that is after the {@link hostInfo host info} part.
* It includes the {@link queryString query string} part if any.
* The implementation of this method referenced Zend_Controller_Request_Http in Zend Framework.
* @return string the request URI portion for the currently requested URL.
* @throws CException if the request URI cannot be determined due to improper server configuration
* @since 1.0.1
*/
public function getRequestUri()
{
if($this->_requestUri===null)
{
if(isset($_SERVER['HTTP_X_REWRITE_URL'])) // IIS
$this->_requestUri=$_SERVER['HTTP_X_REWRITE_URL'];
else if(isset($_SERVER['REQUEST_URI']))
{
$this->_requestUri=$_SERVER['REQUEST_URI'];
if(strpos($this->_requestUri,$_SERVER['HTTP_HOST'])!==false)
$this->_requestUri=preg_replace('/^\w+:\/\/[^\/]+/','',$this->_requestUri);
}
else if(isset($_SERVER['ORIG_PATH_INFO'])) // IIS 5.0 CGI
{
$this->_requestUri=$_SERVER['ORIG_PATH_INFO'];
if(!empty($_SERVER['QUERY_STRING']))
$this->_requestUri.='?'.$_SERVER['QUERY_STRING'];
}
else
throw new CException(Yii::t('yii','CHttpRequest is unable to determine the request URI.'));
}
return $this->_requestUri;
}
/**
* @return string part of the request URL that is after the question mark
*/
public function getQueryString()
{
return isset($_SERVER['QUERY_STRING'])?$_SERVER['QUERY_STRING']:'';
}
/**
* @return boolean if the request is sent via secure channel (https)
*/
public function getIsSecureConnection()
{
return isset($_SERVER['HTTPS']) && !strcasecmp($_SERVER['HTTPS'],'on');
}
/**
* @return string request type, such as GET, POST, HEAD, PUT, DELETE.
*/
public function getRequestType()
{
return strtoupper(isset($_SERVER['REQUEST_METHOD'])?$_SERVER['REQUEST_METHOD']:'GET');
}
/**
* @return boolean whether this is POST request.
*/
public function getIsPostRequest()
{
return !strcasecmp($_SERVER['REQUEST_METHOD'],'POST');
}
/**
* @return boolean whether this is an AJAX (XMLHttpRequest) request.
*/
public function getIsAjaxRequest()
{
return isset($_SERVER['HTTP_X_REQUESTED_WITH'])?$_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest' : false;
}
/**
* @return string server name
*/
public function getServerName()
{
return $_SERVER['SERVER_NAME'];
}
/**
* @return integer server port number
*/
public function getServerPort()
{
return $_SERVER['SERVER_PORT'];
}
/**
* @return string URL referrer, null if not present
*/
public function getUrlReferrer()
{
return isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:null;
}
/**
* @return string user agent
*/
public function getUserAgent()
{
return $_SERVER['HTTP_USER_AGENT'];
}
/**
* @return string user IP address
*/
public function getUserHostAddress()
{
return isset($_SERVER['REMOTE_ADDR'])?$_SERVER['REMOTE_ADDR']:'127.0.0.1';
}
/**
* @return string user host name, null if cannot be determined
*/
public function getUserHost()
{
return isset($_SERVER['REMOTE_HOST'])?$_SERVER['REMOTE_HOST']:null;
}
/**
* @return string entry script file path (processed w/ realpath())
*/
public function getScriptFile()
{
if($this->_scriptFile!==null)
return $this->_scriptFile;
else
return $this->_scriptFile=realpath($_SERVER['SCRIPT_FILENAME']);
}
/**
* Returns information about the capabilities of user browser.
* @param string the user agent to be analyzed. Defaults to null, meaning using the
* current User-Agent HTTP header information.
* @return array user browser capabilities.
* @see http://www.php.net/manual/en/function.get-browser.php
*/
public function getBrowser($userAgent=null)
{
return get_browser($userAgent,true);
}
/**
* @return string user browser accept types
*/
public function getAcceptTypes()
{
return $_SERVER['HTTP_ACCEPT'];
}
/**
* Returns the cookie collection.
* The result can be used like an associative array. Adding {@link CHttpCookie} objects
* to the collection will send the cookies to the client; and removing the objects
* from the collection will delete those cookies on the client.
* @return CCookieCollection the cookie collection.
*/
public function getCookies()
{
if($this->_cookies!==null)
return $this->_cookies;
else
return $this->_cookies=new CCookieCollection($this);
}
/**
* Redirects the browser to the specified URL.
* @param string URL to be redirected to. If the URL is a relative one, the base URL of
* the application will be inserted at the beginning.
* @param boolean whether to terminate the current application
* @param integer the HTTP status code. Defaults to 302. See {@link http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html}
* for details about HTTP status code. This parameter has been available since version 1.0.4.
*/
public function redirect($url,$terminate=true,$statusCode=302)
{
if(strpos($url,'/')===0)
$url=$this->getHostInfo().$url;
header('Location: '.$url, true, $statusCode);
if($terminate)
Yii::app()->end();
}
/**
* @return string the user preferred language.
* The returned language ID will be canonicalized using {@link CLocale::getCanonicalID}.
* This method returns false if the user does not have language preference.
*/
public function getPreferredLanguage()
{
if($this->_preferredLanguage===null)
{
if(isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) && ($n=preg_match_all('/([\w\-_]+)\s*(;\s*q\s*=\s*(\d*\.\d*))?/',$_SERVER['HTTP_ACCEPT_LANGUAGE'],$matches))>0)
{
$languages=array();
for($i=0;$i<$n;++$i)
$languages[$matches[1][$i]]=empty($matches[3][$i]) ? 1.0 : floatval($matches[3][$i]);
arsort($languages);
foreach($languages as $language=>$pref)
return $this->_preferredLanguage=CLocale::getCanonicalID($language);
}
return $this->_preferredLanguage=false;
}
return $this->_preferredLanguage;
}
/**
* Sends a file to user.
* @param string file name
* @param string content to be set.
* @param string mime type of the content. If null, it will be guessed automatically based on the given file name.
* @param boolean whether to terminate the current application after calling this method
*/
public function sendFile($fileName,$content,$mimeType=null,$terminate=true)
{
if($mimeType===null)
{
if(($mimeType=CFileHelper::getMimeTypeByExtension($fileName))===null)
$mimeType='text/plain';
}
header('Pragma: public');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header("Content-type: $mimeType");
header('Content-Length: '.strlen($content));
header("Content-Disposition: attachment; filename=\"$fileName\"");
header('Content-Transfer-Encoding: binary');
echo $content;
if($terminate)
Yii::app()->end();
}
/**
* Returns the random token used to perform CSRF validation.
* The token will be read from cookie first. If not found, a new token
* will be generated.
* @return string the random token for CSRF validation.
* @see enableCsrfValidation
*/
public function getCsrfToken()
{
if($this->_csrfToken===null)
{
$cookie=$this->getCookies()->itemAt($this->csrfTokenName);
if(!$cookie || ($this->_csrfToken=$cookie->value)==null)
{
$cookie=$this->createCsrfCookie();
$this->_csrfToken=$cookie->value;
$this->getCookies()->add($cookie->name,$cookie);
}
}
return $this->_csrfToken;
}
/**
* Creates a cookie with a randomly generated CSRF token.
* Initial values specified in {@link csrfCookie} will be applied
* to the generated cookie.
* @return CHttpCookie the generated cookie
* @see enableCsrfValidation
*/
protected function createCsrfCookie()
{
$cookie=new CHttpCookie($this->csrfTokenName,sha1(uniqid(rand(),true)));
if(is_array($this->csrfCookie))
{
foreach($this->csrfCookie as $name=>$value)
$cookie->$name=$value;
}
return $cookie;
}
/**
* Performs the CSRF validation.
* This is the event handler responding to {@link CApplication::onBeginRequest}.
* The default implementation will compare the CSRF token obtained
* from a cookie and from a POST field. If they are different, a CSRF attack is detected.
* @param CEvent event parameter
* @throws CHttpException if the validation fails
* @since 1.0.4
*/
public function validateCsrfToken($event)
{
if($this->getIsPostRequest())
{
// only validate POST requests
$cookies=$this->getCookies();
if($cookies->contains($this->csrfTokenName) && isset($_POST[$this->csrfTokenName]))
{
$tokenFromCookie=$cookies->itemAt($this->csrfTokenName)->value;
$tokenFromPost=$_POST[$this->csrfTokenName];
$valid=$tokenFromCookie===$tokenFromPost;
}
else
$valid=false;
if(!$valid)
throw new CHttpException(400,Yii::t('yii','The CSRF token could not be verified.'));
}
}
}
/**
* CCookieCollection implements a collection class to store cookies.
*
* You normally access it via {@link CHttpRequest::getCookies()}.
*
* Since CCookieCollection extends from {@link CMap}, it can be used
* like an associative array as follows:
* <pre>
* $cookies[$name]=new CHttpCookie($name,$value); // sends a cookie
* $value=$cookies[$name]->value; // reads a cookie value
* unset($cookies[$name]); // removes a cookie
* </pre>
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id: CHttpRequest.php 1283 2009-08-01 01:21:38Z qiang.xue $
* @package system.web
* @since 1.0
*/
class CCookieCollection extends CMap
{
private $_request;
private $_initialized=false;
/**
* Constructor.
* @param CHttpRequest owner of this collection.
*/
public function __construct(CHttpRequest $request)
{
$this->_request=$request;
$this->copyfrom($this->getCookies());
$this->_initialized=true;
}
/**
* @return CHttpRequest the request instance
*/
public function getRequest()
{
return $this->_request;
}
/**
* @return array list of validated cookies
*/
protected function getCookies()
{
$cookies=array();
if($this->_request->enableCookieValidation)
{
$sm=Yii::app()->getSecurityManager();
foreach($_COOKIE as $name=>$value)
{
if(($value=$sm->validateData($value))!==false)
$cookies[$name]=new CHttpCookie($name,$value);
}
}
else
{
foreach($_COOKIE as $name=>$value)
$cookies[$name]=new CHttpCookie($name,$value);
}
return $cookies;
}
/**
* Inserts an item at the specified position.
* This overrides the parent implementation by performing additional
* operations for each newly added CHttpCookie object.
* @param integer the specified position.
* @param mixed new item
* @throws CException if the item to be inserted is not a CHttpCookie object.
*/
public function add($name,$cookie)
{
if($cookie instanceof CHttpCookie)
{
$this->remove($name);
parent::add($name,$cookie);
if($this->_initialized)
$this->addCookie($cookie);
}
else
throw new CException(Yii::t('yii','CHttpCookieCollection can only hold CHttpCookie objects.'));
}
/**
* Removes an item at the specified position.
* This overrides the parent implementation by performing additional
* cleanup work when removing a TCookie object.
* @param integer the index of the item to be removed.
* @return mixed the removed item.
*/
public function remove($name)
{
if(($cookie=parent::remove($name))!==null)
{
if($this->_initialized)
$this->removeCookie($cookie);
}
return $cookie;
}
/**
* Sends a cookie.
* @param CHttpCookie cook to be sent
*/
protected function addCookie($cookie)
{
$value=$cookie->value;
if($this->_request->enableCookieValidation)
$value=Yii::app()->getSecurityManager()->hashData($value);
if(version_compare(PHP_VERSION,'5.2.0','>='))
setcookie($cookie->name,$value,$cookie->expire,$cookie->path,$cookie->domain,$cookie->secure,$cookie->httpOnly);
else
setcookie($cookie->name,$value,$cookie->expire,$cookie->path,$cookie->domain,$cookie->secure);
}
/**
* Deletes a cookie.
* @param CHttpCookie cook to be deleted
*/
protected function removeCookie($cookie)
{
if(version_compare(PHP_VERSION,'5.2.0','>='))
setcookie($cookie->name,null,0,$cookie->path,$cookie->domain,$cookie->secure,$cookie->httpOnly);
else
setcookie($cookie->name,null,0,$cookie->path,$cookie->domain,$cookie->secure);
}
}