YII Framework学习之request与response用法(基于CHttpRequest响应)

本文实例讲述了YII Framework学习之request与response用法。分享给大家供大家参考，具体如下：

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,'/');  }  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'],'/'.$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 $this->_scriptUrl;  }  public function setScriptUrl($value)  {    $this->_scriptUrl='/'.trim($value,'/');  }  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,'/');    }    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,'/')===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.'));    }  }}