Pear库中Ajax库代码例子大全

?php
require_once 'HTML/AJAX.php';
  
/**
* Class for creating an external AJAX server
*
* Can be used in 2 different modes, registerClass mode where you create an instance of the server and add the classes that will be registered
* and then run handle request
*
* Or you can extend it and add init{className} methods for each class you want to export
*
* Client js generation is exposed through 2 _GET params client and stub
* Setting the _GET param client to `all` will give you all the js classes needed
* Setting the _GET param stub to `all` will give you stubs of all registered classes, you can also set it too just 1 class
*
* @category HTML
* @package AJAX
* @author Joshua Eichorn  
* @copyright 2005 Joshua Eichorn
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version Release: @package_version@
* @link http://pear.php.net/package/PackageName
* @todo Decide if a syntax is needed to generate 2 stubs at once
*/
class HTML_AJAX_Server {
  
  /**
   * Client options array if set to true the code looks at _GET
   * @var bool|array
   */
  var $options = true;
  
  /**
   * HTML_AJAX instance
   * @var HTML_AJAX
   */
  var $ajax;
  
  /**
   * Set to true if your extending the server to add init{className methods}
   */
  var $initMethods = false;
  
  /**
   * Constructor creates the HTML_AJAX instance
     *
     * @todo: verify that PHP_SELF always does what we want
   */
  function HTML_AJAX_Server() {
    $this->ajax =& new HTML_AJAX();
        $this->ajax->serverUrl = $_SERVER['PHP_SELF'];
  }
  
  /**
   * Handle a client request, either generating a client or having HTML_AJAX handle the request
   */
  function handleRequest() {
    if ($this->options == true) {
      $this->_loadOptions();
    }
  
    if (!isset($_GET['c'])) {
      return $this->generateClient();
    }
    else {
            $this->_init($_GET['c']);
      return $this->ajax->handleRequest();
    }
  }
  
    /**
     * Register method passthrough to HTML_AJAX
     *
     * @see HTML_AJAX::registerClass for docs
     */
    function registerClass(&$instance, $exportedName = false, $exportedMethods = false) {
        $this->ajax->registerClass($instance,$exportedName,$exportedMethods);
    }
  
  /**
   * Generate client js
   *
   * @todo Add Http_Cache type functionality so the client will cache the js
   */
  function generateClient() {
        header('Content-type: text/javascript');
  
    if ($this->options['stub'] === 'all') {
      if ($this->initMethods) {
        $this->_initAll();
      }
            echo $this->ajax->generateJavaScriptClient($this->options['stub']);
    }
    else {
            if ($this->options['stub'] !== false) {
                $this->_init($this->options['stub']);
                echo $this->ajax->generateClassStub($this->options['stub']);
            }
    }
  
        $library = strtolower($this->options['client']);
    switch($library) {
            case 'all':
            case 'html_ajax':
                $this->_readFile($this->clientJsLocation()."HTML_AJAX.js");
                break;
            case 'json':
                $this->_readFile($this->clientJsLocation()."JSON.js");
                break;
            case 'request':
                $this->_readFile($this->clientJsLocation()."Request.js");
                break;
            case 'main':
                $this->_readFile($this->clientJsLocation()."Main.js");
                break;
            case 'httpclient':
                $this->_readFile($this->clientJsLocation()."HttpClient.js");
                break;
            case 'dispatcher':
                $this->_readFile($this->clientJsLocation()."Dispatcher.js");
                break;
            case false:
                break;
            default:
                echo "alert('Unknown javascript library: $library');";
                break;
    }
  
  }
  
    /**
     * Run readfile on input with basic error checking
     *
     * @param string $file file to read
     * @access private
     */
    function _readFile($file) {
        if (file_exists($file)) {
            readfile($file);
        }
        else {
                echo "alert('Unable to find javascript file: $file');";
        }
    }
  
  /**
   * Get the location of the client js
   *
   * @return string
   * @todo figure out where this will be on an install
   */
  function clientJsLocation() {
    return '@data-dir@/HTML_AJAX/js/';
  }
  
  /**
   * Load options from _GET
   *
   * @access private
   * @todo Is this preg_replace a good enough security check?
   */
  function _loadOptions() {
        $this->options = array('client'=>false,'stub'=>false);
    if (isset($_GET['client'])) {
      $this->options['client'] = $_GET['client'];
    }
    if (isset($_GET['stub'])) {
      $stub = trim(preg_replace('/[^A-Za-z_0-9]/','',$_GET['stub']));
      if (!emptyempty($stub)) {
        $this->options['stub'] = $stub;
      }
      else {
        $this->options['stub'] = false;
      }
    }
  }
  
  /**
   * Run every init method on the class
   * @access private
   */
  function _initAll() {
    $methods = get_class_methods(get_class($this));
  
    foreach($methods as $method) {
      if (substr($method,0,4) == 'init') {
        $this->$method();
      }
    }
  }
  
  /**
   * Init one class
   * @param string $className
   * @access private
   * @todo error handling if the method doesn't exist
   */
  function _init($className) {
    $m = "init$className";
    if (is_callable(array(&$this,$m))) {
      $this->$m();
    }
  }
}
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
?>
当前版本为0.5.2,下载地址:
http://download.pear.php.net/package/HTML_AJAX-0.5.2.tgz