YII中提供了CHttpRequest，封装了请求常用的方法。具体代码如下：
class CHttpRequest extends CApplicationComponent { public $enableCookieValidation=false; public $enableCsrfValidation=false; public $csrfTokenName='YII_CSRF_TOKEN'; public $csrfCookie; private $_requestUri; private $_pathInfo; private $_scriptFile; private $_scriptUrl; private $_hostInfo; private $_baseUrl; private $_cookies; private $_preferredLanguage; private $_csrfToken; private $_deleteParams; private $_putParams; public function init() { parent::init(); $this->normalizeRequest(); } protected function normalizeRequest() { // normalize request if(function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc()) { if(isset($_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($this,'validateCsrfToken')); } public function stripSlashes(&$data) { return is_array($data)?array_map(array($this,'stripSlashes'),$data):stripslashes($data); } public function getParam($name,$defaultValue=null) { return isset($_GET[$name]) ? $_GET[$name] : (isset($_POST[$name]) ? $_POST[$name] : $defaultValue); } public function getQuery($name,$defaultValue=null) { return isset($_GET[$name]) ? $_GET[$name] : $defaultValue; } public function getPost($name,$defaultValue=null) { return isset($_POST[$name]) ? $_POST[$name] : $defaultValue; } public function getDelete($name,$defaultValue=null) { if($this->_deleteParams===null) $this->_deleteParams=$this->getIsDeleteRequest() ? $this->getRestParams() : array(); return isset($this->_deleteParams[$name]) ? $this->_deleteParams[$name] : $defaultValue; } public function getPut($name,$defaultValue=null) { if($this->_putParams===null) $this->_putParams=$this->getIsPutRequest() ? $this->getRestParams() : array(); return isset($this->_putParams[$name]) ? $this->_putParams[$name] : $defaultValue; } protected function getRestParams() { $result=array(); if(function_exists('mb_parse_str')) mb_parse_str(file_get_contents('php://input'), $result); else parse_str(file_get_contents('php://input'), $result); return $result; } public function getUrl() { return $this->getRequestUri(); } public function getHostInfo($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']; $port=$secure ? $this->getSecurePort() : $this->getPort(); if(($port!==80 && !$secure) || ($port!==443 && $secure)) $this->_hostInfo.=':'.$port; } } if($schema!=='') { $secure=$this->getIsSecureConnection(); if($secure && $schema==='https' || !$secure && $schema==='http') return $this->_hostInfo; $port=$schema==='https' ? $this->getSecurePort() : $this->getPort(); if($port!==80 && $schema==='http' || $port!==443 && $schema==='https') $port=':'.$port; else $port=''; $pos=strpos($this->_hostInfo,':'); return $schema.substr($this->_hostInfo,$pos,strcspn($this->_hostInfo,':',$pos+1)+1).$port; } else return $this->_hostInfo; } public function setHostInfo($value) { $this->_hostInfo=rtrim($value,'https://www.jb51.net/'); } public function getBaseUrl($absolute=false) { if($this->_baseUrl===null) $this->_baseUrl=rtrim(dirname($this->getScriptUrl()),'\\/'); return $absolute ? $this->getHostInfo() . $this->_baseUrl : $this->_baseUrl; } public function setBaseUrl($value) { $this->_baseUrl=$value; } 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'],'https://www.jb51.net/'.$scriptName))!==false) $this->_scriptUrl=substr($_SERVER['SCRIPT_NAME'],0,$pos).'https://www.jb51.net/'.$scriptName; else if(isset($_SERVER['DOCUMENT_ROOT']) && strpos($_SERVER['SCRIPT_FILENAME'],$_SERVER['DOCUMENT_ROOT'])===0) $this->_scriptUrl=str_replace('\\','https://www.jb51.net/',str_replace($_SERVER['DOCUMENT_ROOT'],'',$_SERVER['SCRIPT_FILENAME'])); else throw new CException(Yii::t('yii','CHttpRequest is unable to determine the entry script URL.')); } return $this->_scriptUrl; } public function setScriptUrl($value) { $this->_scriptUrl='https://www.jb51.net/'.trim($value,'https://www.jb51.net/'); } public function getPathInfo() { if($this->_pathInfo===null) { $pathInfo=$this->getRequestUri(); if(($pos=strpos($pathInfo,'?'))!==false) $pathInfo=substr($pathInfo,0,$pos); $pathInfo=urldecode($pathInfo); $scriptUrl=$this->getScriptUrl(); $baseUrl=$this->getBaseUrl(); if(strpos($pathInfo,$scriptUrl)===0) $pathInfo=substr($pathInfo,strlen($scriptUrl)); else if($baseUrl==='' || strpos($pathInfo,$baseUrl)===0) $pathInfo=substr($pathInfo,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.')); $this->_pathInfo=trim($pathInfo,'https://www.jb51.net/'); } return $this->_pathInfo; } public function getRequestUri() { if($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(isset($_SERVER['HTTP_HOST'])) { if(strpos($this->_requestUri,$_SERVER['HTTP_HOST'])!==false) $this->_requestUri=preg_replace('/^\w+:\/\/[^\/]+/','',$this->_requestUri); } else $this->_requestUri=preg_replace('/^(http|https):\/\/[^\/]+/i','',$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 $this->_requestUri; } public function getQueryString() { return isset($_SERVER['QUERY_STRING'])?$_SERVER['QUERY_STRING']:''; } public function getIsSecureConnection() { return isset($_SERVER['HTTPS']) && !strcasecmp($_SERVER['HTTPS'],'on'); } public function getRequestType() { return strtoupper(isset($_SERVER['REQUEST_METHOD'])?$_SERVER['REQUEST_METHOD']:'GET'); } public function getIsPostRequest() { return isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'POST'); } public function getIsDeleteRequest() { return isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'DELETE'); } public function getIsPutRequest() { return isset($_SERVER['REQUEST_METHOD']) && !strcasecmp($_SERVER['REQUEST_METHOD'],'PUT'); } public function getIsAjaxRequest() { return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH']==='XMLHttpRequest'; } public function getServerName() { return $_SERVER['SERVER_NAME']; } public function getServerPort() { return $_SERVER['SERVER_PORT']; } public function getUrlReferrer() { return isset($_SERVER['HTTP_REFERER'])?$_SERVER['HTTP_REFERER']:null; } public function getUserAgent() { return isset($_SERVER['HTTP_USER_AGENT'])?$_SERVER['HTTP_USER_AGENT']:null; } public function getUserHostAddress() { return isset($_SERVER['REMOTE_ADDR'])?$_SERVER['REMOTE_ADDR']:'127.0.0.1'; } public function getUserHost() { return isset($_SERVER['REMOTE_HOST'])?$_SERVER['REMOTE_HOST']:null; } public function getScriptFile() { if($this->_scriptFile!==null) return $this->_scriptFile; else return $this->_scriptFile=realpath($_SERVER['SCRIPT_FILENAME']); } public function getBrowser($userAgent=null) { return get_browser($userAgent,true); } public function getAcceptTypes() { return isset($_SERVER['HTTP_ACCEPT'])?$_SERVER['HTTP_ACCEPT']:null; } private $_port; public function getPort() { if($this->_port===null) $this->_port=!$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 80; return $this->_port; } public function setPort($value) { $this->_port=(int)$value; $this->_hostInfo=null; } private $_securePort; public function getSecurePort() { if($this->_securePort===null) $this->_securePort=$this->getIsSecureConnection() && isset($_SERVER['SERVER_PORT']) ? (int)$_SERVER['SERVER_PORT'] : 443; return $this->_securePort; } public function setSecurePort($value) { $this->_securePort=(int)$value; $this->_hostInfo=null; } public function getCookies() { if($this->_cookies!==null) return $this->_cookies; else return $this->_cookies=new CCookieCollection($this); } public function redirect($url,$terminate=true,$statusCode=302) { if(strpos($url,'https://www.jb51.net/')===0) $url=$this->getHostInfo().$url; header('Location: '.$url, true, $statusCode); if($terminate) Yii::app()->end(); } 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 $this->_preferredLanguage; } public function sendFile($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: $mimeType"); if(ini_get("output_handler")=='') header('Content-Length: '.(function_exists('mb_strlen') ? mb_strlen($content,'8bit') : strlen($content))); header("Content-Disposition: attachment; filename=\"$fileName\""); header('Content-Transfer-Encoding: binary'); if($terminate) { // clean up the application first because the file downloading could take long time // which may cause timeout of some resources (such as DB connection) Yii::app()->end(0,false); echo $content; exit(0); } else echo $content; } public function xSendFile($filePath, $options=array()) { if(!is_file($filePath)) return false; if(!isset($options['saveName'])) $options['saveName']=basename($filePath); if(!isset($options['mimeType'])) { if(($options['mimeType']=CFileHelper::getMimeTypeByExtension($filePath))===null) $options['mimeType']='text/plain'; } if(!isset($options['xHeader'])) $options['xHeader']='X-Sendfile'; header('Content-type: '.$options['mimeType']); header('Content-Disposition: attachment; filename="'.$options['saveName'].'"'); header(trim($options['xHeader']).': '.$filePath); if(!isset($options['terminate']) || $options['terminate']) Yii::app()->end(); return true; } public function getCsrfToken() { if($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; } protected function createCsrfCookie() { $cookie=new CHttpCookie($this->csrfTokenName,sha1(uniqid(mt_rand(),true))); if(is_array($this->csrfCookie)) { foreach($this->csrfCookie as $name=>$value) $cookie->$name=$value; } return $cookie; } public function validateCsrfToken($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.')); } } }
request操作的相关方法，一目了然。