CodeIgniter網站靜態化管理系統

時間 2019-12-17

標籤 codeigniter 網站靜態管理系統欄目 Apache 简体版

原文原文鏈接

CodeIgniter自己帶了一套靜態化系統php

使用方法以下:ajax

$this->output->cache( 3 );//每三分鐘從新生成一次靜態頁面數據庫

不過這個在系統化的編輯中不方便管理由此開發者能夠自定義一套本身的緩存管理系統緩存

好比加載相關的ctrl + act配置到memcache中以方便配置的查詢及緩存的清理從新生成等框架

增長數據庫表以下fetch

CREATE TABLE `chewu_news` (
`id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
`delsign` tinyint(3) unsigned NOT NULL,
`mid` bigint(20) unsigned NOT NULL,
`comment` varchar(128) DEFAULT NULL,
`modtime` datetime NOT NULL,
`addtime` datetime NOT NULL,
`controller' varchar(128) NOT NULL,
'action' varchar(128) NOT NULL,
'minutes' mediumint default 0;
PRIMARY KEY (`id`)
) ENGINE=MyISAM AUTO_INCREMENT=138 DEFAULT CHARSET=utf8 COMMENT='緩存管理表;ui

添加ctrl action到數據庫中this

/**
* dev
* 加載ctrl action到數據庫中只在開發時使用
*/
public function loadCtrlActIntoDb()
{
$this->_load_ctrls_into_db( dirname( dirname( __FILE__ ) ));
}url

//////////////////////////////////////////////////////////////////////////////////
//load cache info into database
private function _load_ctrls_into_db( $dir )
{
  include_once APPPATH . 'utils/TimeUtils.php';

  $list = scandir( $dir ); // 獲得該文件下的全部文件和文件夾
  foreach( $list as $file)
  { //遍歷
   $file_location = $dir . "/" . $file; //生成路徑debug

   if( is_file( $file_location ) && (-1 != strstr( $file_location, '.php' ) || -1 != strstr( $file_location, '.PHP' )) )
   {
    //取class
    $iBegin = strpos( $file_location, 'controllers' );
    $iBegin += strlen( 'controllers' );
    $iEnd = strrpos( $file_location, '/' );

    $strModel = '';
    $strModel = substr( $file_location, $iBegin + 1, strrpos( $file_location, '.php' ) - $iBegin - 1 );

    if( $iBegin != $iEnd )
    { //model爲文件夾名+文件名
     $strModel = str_replace( '/', '_', $strModel );
    }

    if( 0 === strpos( $strModel, 'learn' ) || 0 === strpos( $strModel, 'test' ) || 0 === strpos( $strModel, 'config' ) )
    {
     continue;
    }

    $strClsFile = file_get_contents( $file_location );

    $iPos = strpos( $strClsFile, 'class' );

    if( false == $iPos )
    { //非類文件
     continue;
    }

    $strClsFile = substr( $strClsFile, $iPos );

    $arrRes = preg_split( '/public[ ]+function[ ]+/', $strClsFile );

    $strCls = $arrRes [0];
    $strCls = preg_replace( '/[ ]+/', ' ', $strCls );

    $arrCls = explode( ' ', $strCls );
    $strCtrl = trim( $arrCls [1] );

    $iSize = count( $arrRes );

    for( $i = 1; $i < $iSize; ++ $i )
    { //
     $strAction = trim( $arrRes [$i] );

     $iEnd = strpos( $strAction, '(' );

     $strFunc = substr( $strAction, 0, $iEnd );

     if( '__construct' != $strFunc && '__destruct' != $strFunc && !isset( $this->objCtrls->$strCtrl->actions [$strFunc] ) )
     {
      //
      $recCtrlAction = array (
        'addtime' => TimeUtils::getFullTime(),
        'modtime' => TimeUtils::getFullTime(),
        'delsign' => MallEnum::DEL_SIGN_NO,
        'mid' => 1,
        'controller' => $strCtrl,
        'action' => $strFunc,
        'minutes' => 0 );

      $this->db->insert( TableNames::CHEWU_CACHE_TIME_MGR, $recCtrlAction );
     }
    }
   }

   if( is_dir( $file_location ) && $file != "." && $file != ".." )
   { //判斷是否是文件夾
    $this->_load_ctrls_into_db( $file_location ); //繼續遍歷
   }
  }

}

加載ctrl action信息到memcache

private function _loadCtrls( )
{
  $this->objCtrls = new stdClass();

  $query = $this->db->get_where( TableNames::CHEWU_CACHE_TIME_MGR, array (
    'delsign' => MallEnum::DEL_SIGN_NO ) );

  $arrRes = $query->result();

  foreach( $arrRes as $row)
  {
   if( !isset( $this->objCtrls->{$row->controller} ) )
   {
    $this->objCtrls->{$row->controller} = new stdClass();
   }

   $this->objCtrls->{ $row->controller }->actions [$row->action] = $row;
  }

}

/**
* 加載到內存
*/
public function loadStaticMgrInfoIntoMem( )
{
  $this->_loadCtrls();

  $this->memcacheutils->set( 'ctrlsInfo', $this->objCtrls, 0 );
  $this->memcacheutils->set( 'bCtrlInfo', 1, 0 );

  foreach( $this->objCtrls as $ctrl => $actions)
  {
   if( isset( $actions->actions ) )
   {
    foreach( $actions->actions as $actname => $act)
    {
     $this->memcacheutils->set( MallEnum::CTRL_ACTION . $act->controller . $act->action, $act->minutes, 0 );
    }
   }
  }

  echo 'ret=0';

}

以後可開發一管理端對某些須要的action進行管理

這時使用靜態化的訪求以下

public function index( )
{
$this->output->cache( intval( $this->memcacheutils->get( MallEnum::CTRL_ACTION . __CLASS__ . __FUNCTION__ ) ));
$this->mallBiz->index();
}

爲了方便管理這裏要對CodeIgniter的框架進行一些修改以下(system/core/Output.php)：

/**
* Write a Cache File
*
* @access public
* @param string
* @return void
*/
function _write_cache($output)
{
$CI =& get_instance();
$path = $CI->config->item('cache_path');

$cache_path = ($path == '') ? APPPATH.'cache/' : $path;

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//以上爲方便管理cache所作的修改

  $Rtr = $GLOBALS[ 'RTR' ];
  $cache_path .= $Rtr->fetch_class() . $Rtr->fetch_method() . '/';

  if( !is_dir( $cache_path ) )
  {
   mkdir( $cache_path );
  }
  //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  if ( ! is_dir($cache_path) OR ! is_really_writable($cache_path))
  {
   log_message('error', "Unable to write cache file: ".$cache_path);
   return;
  }

  $uri = $CI->config->item('base_url').
    $CI->config->item('index_page').
    $CI->uri->uri_string();

$cache_path .= md5($uri);

  if ( ! $fp = @fopen($cache_path, FOPEN_WRITE_CREATE_DESTRUCTIVE))
  {
   log_message('error', "Unable to write cache file: ".$cache_path);
   return;
  }

$expire = time() + ($this->cache_expiration * 60);

  if (flock($fp, LOCK_EX))
  {
   fwrite($fp, $expire.'TS--->'.$output);
   flock($fp, LOCK_UN);
  }
  else
  {
   log_message('error', "Unable to secure a file lock for file at: ".$cache_path);
   return;
  }
  fclose($fp);
  @chmod($cache_path, FILE_WRITE_MODE);

log_message('debug', "Cache file written: ".$cache_path);
}

/**
* Update/serve a cached file
*
* @access public
* @param object config class
* @param object uri class
* @return void
*/
function _display_cache(&$CFG, &$URI)
{
$cache_path = ($CFG->item('cache_path') == '') ? APPPATH.'cache/' : $CFG->item('cache_path');

  // Build the file path. The file name is an MD5 hash of the full URI

  $uri = $CFG->item('base_url').
    $CFG->item('index_page').
    $URI->uri_string;

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//此爲方便管理cache而作的修改

  $Rtr = $GLOBALS[ 'RTR' ];
  $cache_path .= $Rtr->fetch_class() . $Rtr->fetch_method() . '/';
    //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

$filepath = $cache_path . md5($uri);

  if ( ! @file_exists($filepath))
  {
   return FALSE;
  }

  if ( ! $fp = @fopen($filepath, FOPEN_READ))
  {
   return FALSE;
  }

flock($fp, LOCK_SH);

  $cache = '';
  if (filesize($filepath) > 0)
  {
   $cache = fread($fp, filesize($filepath));
  }

flock($fp, LOCK_UN);
fclose($fp);

  // Strip out the embedded timestamp
  if ( ! preg_match("/(\d+TS--->)/", $cache, $match))
  {
   return FALSE;
  }

  // Has the file expired? If so we'll delete it.
  if (time() >= trim(str_replace('TS--->', '', $match['1'])))
  {
   if (is_really_writable($cache_path))
   {
    @unlink($filepath);
    log_message('debug', "Cache file has expired. File deleted");
    return FALSE;
   }
  }

  // Display the cache
  $this->_display(str_replace($match['0'], '', $cache));
  log_message('debug', "Cache file is current. Sending it to browser.");
  return TRUE;
}

}

經以上修改後生成的cache再也不是之前的只有md5 hash後的文件名而是每一個ctrlaction放在同一個文件夾裏這樣能夠方便cache的管理（好比刪除等）

緩存清理方法以下

//ajax方法

public function clearStaticCache()
{
  $strCtrl = trim( $this->uri->segment( 4 ));
  $strAct = trim( $this->uri->segment( 5 ));

  if( $strCtrl === false || $strCtrl == '' ||
   $strAct === false || $strAct == '' )
  {
   show_404();
  }

  $strPath = $this->config->item( 'cache_path' ) . $strCtrl .$strAct;

  if( file_exists( $strPath ) )
  {
   $this->load->helper( 'file' );

   delete_files( $strPath, true );
   rmdir( $strPath );
  }

  echo 'ret=0';
}