sajax.php

Ajax最流行书籍

<?php	
if (!isset($SAJAX_INCLUDED)) {

  /*  
   * GLOBALS AND DEFAULTS
   *
   */ 
  $sajax_debug_mode = 0;
  $sajax_export_list = array();
  $sajax_request_type = "GET";
  $sajax_remote_uri = "";
	
  /*
   * CODE
   *
   */ 
  function sajax_init() {
  }
	
  function sajax_get_my_uri() {
    global $REQUEST_URI;
		
    return $REQUEST_URI;
  }
	
  $sajax_remote_uri = sajax_get_my_uri();

  // START: sajax_handle_client_request

  function sajax_handle_client_request() {
    global $sajax_export_list;
		
    $mode = "";
		
    if (! empty($_GET["rs"])) 
      $mode = "get";
		
    if (!empty($_POST["rs"]))
      $mode = "post";
			
    if (empty($mode)) 
      return;

    if ($mode == "get") {
      // Bust cache in the head
      header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT");    // Date in the past
      header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
      // always modified
      header ("Cache-Control: no-cache, must-revalidate");  // HTTP/1.1
      header ("Pragma: no-cache");                          // HTTP/1.0
      $func_name = $_GET["rs"];
      if (! empty($_GET["rsargs"])) 
	$args = $_GET["rsargs"];
      else
	$args = array();
    }
    else {
      $func_name = $_POST["rs"];
      if (! empty($_POST["rsargs"])) 
	$args = $_POST["rsargs"];
      else
	$args = array();
    }
		
    if (! in_array($func_name, $sajax_export_list))
      echo "-:$func_name not callable";
    else {
      echo "+:";
      $result = call_user_func_array($func_name, $args);
      echo $result;
    }
    exit;
  }

  // END: sajax_handle_client_request	

  function sajax_get_common_js() {
    global $sajax_debug_mode;
    global $sajax_request_type;
    global $sajax_remote_uri;
		
    $t = strtoupper($sajax_request_type);
    if ($t != "GET" && $t != "POST") 
      return "// Invalid type: $t.. \n\n";
		
    ob_start();
    ?>
		
      // remote scripting library
      // (c) copyright 2005 modernmethod, inc
      var sajax_debug_mode = <?php echo $sajax_debug_mode ? "true" : "false"; ?>;
      var sajax_request_type = "<?php echo $t; ?>";
		
      function sajax_debug(text) {
	if (sajax_debug_mode)
	  alert("RSD: " + text)
	    }
      function sajax_init_object() {
	sajax_debug("sajax_init_object() called..")
 			
	  var A;
	try {
	  A=new ActiveXObject("Msxml2.XMLHTTP");
	} catch (e) {
	  try {
	    A=new ActiveXObject("Microsoft.XMLHTTP");
	  } catch (oc) {
	    A=null;
	  }
	}
	if(!A && typeof XMLHttpRequest != "undefined")
	  A = new XMLHttpRequest();
	if (!A)
	  sajax_debug("Could not create connection object.");
	return A;
      }
      function sajax_do_call(func_name, args) {
	var i, x, n;
	var uri;
	var post_data;
			
	uri = "<?php echo $sajax_remote_uri; ?>";
	if (sajax_request_type == "GET") {
	  if (uri.indexOf("?") == -1) 
	    uri = uri + "?rs=" + escape(func_name);
	  else
	    uri = uri + "&rs=" + escape(func_name);
	  for (i = 0; i < args.length-1; i++) 
	    uri = uri + "&rsargs[]=" + escape(args[i]);
	  uri = uri + "&rsrnd=" + new Date().getTime();
	  post_data = null;
	} else {
	  post_data = "rs=" + escape(func_name);
	  for (i = 0; i < args.length-1; i++) 
	    post_data = post_data + "&rsargs[]=" + escape(args[i]);
	}
			
	x = sajax_init_object();
	x.open(sajax_request_type, uri, true);
	if (sajax_request_type == "POST") {
	  x.setRequestHeader("Method", "POST " + uri + " HTTP/1.1");
	  x.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	}
	x.onreadystatechange = function() {
	  if (x.readyState != 4) 
	    return;
	  sajax_debug("received " + x.responseText);
				
	  var status;
	  var data;
	  status = x.responseText.charAt(0);
	  data = x.responseText.substring(2);
	  if (status == "-") 
	    alert("Error: " + data);
	  else  
	    args[args.length-1](data);
	}
	x.send(post_data);
	sajax_debug(func_name + " uri = " + uri + "/post = " + post_data);
	sajax_debug(func_name + " waiting..");
	delete x;
      }
		
      <?php
	  $html = ob_get_contents();
      ob_end_clean();
      return $html;
  }
	
  function sajax_show_common_js() {
    echo sajax_get_common_js();
  }
	
  // javascript escape a value
  function sajax_esc($val)
  {
    return str_replace('"', '\\\\"', $val);
  }

  function sajax_get_one_stub($func_name) {
    ob_start();	
    ?>
		
      // wrapper for <?php echo $func_name; ?>
		
      function x_<?php echo $func_name; ?>() {
	sajax_do_call("<?php echo $func_name; ?>",
		      x_<?php echo $func_name; ?>.arguments);
      }
		
      <?php
	  $html = ob_get_contents();
      ob_end_clean();
      return $html;
  }
	
  function sajax_show_one_stub($func_name) {
    echo sajax_get_one_stub($func_name);
  }
	
  function sajax_export() {
    global $sajax_export_list;
		
    $n = func_num_args();
    for ($i = 0; $i < $n; $i++) {
      $sajax_export_list[] = func_get_arg($i);
    }
  }
	
  $sajax_js_has_been_shown = 0;
  function sajax_get_javascript()
  {
    global $sajax_js_has_been_shown;
    global $sajax_export_list;
		
    $html = "";
    if (! $sajax_js_has_been_shown) {
      $html .= sajax_get_common_js();
      $sajax_js_has_been_shown = 1;
    }
    foreach ($sajax_export_list as $func) {
      $html .= sajax_get_one_stub($func);
    }
    return $html;
  }
	
  function sajax_show_javascript()
  {
    echo sajax_get_javascript();
  }

	
  $SAJAX_INCLUDED = 1;
 }
?>