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mashup-delicious-06-example6-10-Sajax.php / php



  <?php        
  if (!isset(SAJAX_INCLUDED)) {
  
          /*  
  	 * GLOBALS AND DEFAULTS
  	 *
  	 */ 
          GLOBALS['sajax_version'] = '0.12';        
          GLOBALS['sajax_debug_mode'] = 0;
          GLOBALS['sajax_export_list'] = array();
          GLOBALS['sajax_request_type'] = 'GET';
          GLOBALS['sajax_remote_uri'] = '';
          GLOBALS['sajax_failure_redirect'] = '';
          
          /*
  	 * CODE
  	 *
  	 */ 
           
          //
          // Initialize the Sajax library.
          //
          function sajax_init() {
          }
          
          //
          // Helper function to return the script's own URI. 
          // 
          function sajax_get_my_uri() {
                  return _SERVER["REQUEST_URI"];
          }
          sajax_remote_uri = sajax_get_my_uri();
          
          //
          // Helper function to return an eval()-usable representation
          // of an object in JavaScript.
          // 
          function sajax_get_js_repr(value) {
                  type = gettype(value);
                  
                  if (type == "boolean") {
                          return (value) ? "Boolean(true)" : "Boolean(false)";
                  } 
                  elseif (type == "integer") {
                          return "parseInt(value)";
                  } 
                  elseif (type == "double") {
                          return "parseFloat(value)";
                  } 
                  elseif (type == "array" || type == "object" ) {
                          //
                          // XXX Arrays with non-numeric indices are not
                          // permitted according to ECMAScript, yet everyone
                          // uses them.. We'll use an object.
                          // 
                          s = "{ ";
                          if (type == "object") {
                                  value = get_object_vars(value);
                          } 
                          foreach (value as k=>v) {
                                  esc_key = sajax_esc(k);
                                  if (is_numeric(k)) 
                                          s .= "k: " . sajax_get_js_repr(v) . ", ";
                                  else
                                          s .= "\"esc_key\": " . sajax_get_js_repr(v) . ", ";
                          }
                          if (count(value))
                                  s = substr(s, 0, -2);
                          return s . " }";
                  } 
                  else {
                          esc_val = sajax_esc(value);
                          s = "'esc_val'";
                          return s;
                  }
          }
  
          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;
  
                  target = "";
                  
                  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 "var res = " . trim(sajax_get_js_repr(result)) . "; res;";
                  }
                  exit;
          }
          
          function sajax_get_common_js() {
                  global sajax_debug_mode;
                  global sajax_request_type;
                  global sajax_remote_uri;
                  global sajax_failure_redirect;
                  
                  t = strtoupper(sajax_request_type);
                  if (t != "" && 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; ?>";
                  var sajax_target_id = "";
                  var sajax_failure_redirect = "<?php echo sajax_failure_redirect; ?>";
                  
                  function sajax_debug(text) {
                          if (sajax_debug_mode)
                                  alert(text);
                  }
                  
                   function sajax_init_object() {
                           sajax_debug("sajax_init_object() called..")
                           
                           var A;
                           
                           var msxmlhttp = new Array(
                                  'Msxml2.XMLHTTP.5.0',
                                  'Msxml2.XMLHTTP.4.0',
                                  'Msxml2.XMLHTTP.3.0',
                                  'Msxml2.XMLHTTP',
                                  'Microsoft.XMLHTTP');
                          for (var i = 0; i < msxmlhttp.length; i++) {
                                  try {
                                          A = new ActiveXObject(msxmlhttp[i]);
                                  } catch (e) {
                                          A = null;
                                  }
                          }
                           
                          if(!A && typeof XMLHttpRequest != "undefined")
                                  A = new XMLHttpRequest();
                          if (!A)
                                  sajax_debug("Could not create connection object.");
                          return A;
                  }
                  
                  var sajax_requests = new Array();
                  
                  function sajax_cancel() {
                          for (var i = 0; i < sajax_requests.length; i++) 
                                  sajax_requests[i].abort();
                  }
                  
                  function sajax_do_call(func_name, args) {
                          var i, x, n;
                          var uri;
                          var post_data;
                          var target_id;
                          
                          sajax_debug("in sajax_do_call().." + sajax_request_type + "/" + sajax_target_id);
                          target_id = sajax_target_id;
                          if (typeof(sajax_request_type) == "undefined" || sajax_request_type == "") 
                                  sajax_request_type = "GET";
                          
                          uri = "<?php echo sajax_remote_uri; ?>";
                          if (sajax_request_type == "GET") {
                          
                                  if (uri.indexOf("?") == -1) 
                                          uri += "?rs=" + escape(func_name);
                                  else
                                          uri += "&rs=" + escape(func_name);
                                  uri += "&rst=" + escape(sajax_target_id);
                                  uri += "&rsrnd=" + new Date().getTime();
                                  
                                  for (i = 0; i < args.length-1; i++) 
                                          uri += "&rsargs[]=" + escape(args[i]);
  
                                  post_data = null;
                          } 
                          else if (sajax_request_type == "POST") {
                                  post_data = "rs=" + escape(func_name);
                                  post_data += "&rst=" + escape(sajax_target_id);
                                  post_data += "&rsrnd=" + new Date().getTime();
                                  
                                  for (i = 0; i < args.length-1; i++) 
                                          post_data = post_data + "&rsargs[]=" + escape(args[i]);
                          }
                          else {
                                  alert("Illegal request type: " + sajax_request_type);
                          }
                          
                          x = sajax_init_object();
                          if (x == null) {
                                  if (sajax_failure_redirect != "") {
                                          location.href = sajax_failure_redirect;
                                          return false;
                                  } else {
                                          sajax_debug("NULL sajax object for user agent:\n" + navigator.userAgent);
                                          return false;
                                  }
                          } else {
                                  x.open(sajax_request_type, uri, true);
                                  // window.open(uri);
                                  
                                  sajax_requests[sajax_requests.length] = x;
                                  
                                  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;
                                          var txt = x.responseText.replace(/^\s*|\s*/g,"");
                                          status = txt.charAt(0);
                                          data = txt.substring(2);
  
                                          if (status == "") {
                                                  // let's just assume this is a pre-response bailout and let it slide for now
                                          } else if (status == "-") 
                                                  alert("Error: " + data);
                                          else {
                                                  if (target_id != "") 
                                                          document.getElementById(target_id).innerHTML = eval(data);
                                                  else {
                                                          try {
                                                                  var callback;
                                                                  var extra_data = false;
                                                                  if (typeof args[args.length-1] == "object") {
                                                                          callback = args[args.length-1].callback;
                                                                          extra_data = args[args.length-1].extra_data;
                                                                  } else {
                                                                          callback = args[args.length-1];
                                                                  }
                                                                  callback(eval(data), extra_data);
                                                          } catch (e) {
                                                                  sajax_debug("Caught error " + e + ": Could not eval " + data );
                                                          }
                                                  }
                                          }
                                  }
                          }
                          
                          sajax_debug(func_name + " uri = " + uri + "/post = " + post_data);
                          x.send(post_data);
                          sajax_debug(func_name + " waiting..");
                          delete x;
                          return true;
                  }
                  
                  <?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)
          {
                  val = str_replace("\\", "\\\\", val);
                  val = str_replace("\r", "\\r", val);
                  val = str_replace("\n", "\\n", val);
                  val = str_replace("'", "\\'", 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;
  }
  ?>
  


(C) Æliens 20/2/2008

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