[Sommaire] [Imprimer]

   1  /* Simple AJAX Code-Kit (SACK) */
   2  /* ©2005 Gregory Wild-Smith */
   3  /* www.twilightuniverse.com */
   4  /* Software licenced under a modified X11 licence, see documentation or authors website for more details */
   5  
   6  function sack(file){
   7    this.AjaxFailedAlert = "Your browser does not support the enhanced functionality of this website, and therefore you will have an experience that differs from the intended one.\n";
   8    this.requestFile = file;
   9    this.method = "POST";
  10    this.URLString = "";
  11    this.encodeURIString = true;
  12    this.execute = false;
  13  
  14    this.onLoading = function() { };
  15    this.onLoaded = function() { };
  16    this.onInteractive = function() { };
  17    this.onCompletion = function() { };
  18    this.afterCompletion = function() { };
  19  
  20    this.createAJAX = function() {
  21      try {
  22        this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
  23      } catch (e) {
  24        try {
  25          this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  26        } catch (err) {
  27          this.xmlhttp = null;
  28        }
  29      }
  30      if(!this.xmlhttp && typeof XMLHttpRequest != "undefined"){
  31        this.xmlhttp = new XMLHttpRequest();
  32      }
  33      if (!this.xmlhttp){
  34        this.failed = true;
  35      }
  36    };
  37  
  38    this.setVar = function(name, value){
  39      if (this.URLString.length < 3){
  40        this.URLString = name + "=" + value;
  41      } else {
  42        this.URLString += "&" + name + "=" + value;
  43      }
  44    };
  45  
  46    this.encVar = function(name, value){
  47      var varString = encodeURIComponent(name) + "=" + encodeURIComponent(value);
  48    return varString;
  49    };
  50  
  51    this.encodeURLString = function(string){
  52      varArray = string.split('&');
  53      for (i = 0; i < varArray.length; i++){
  54        urlVars = varArray[i].split('=');
  55        if (urlVars[0].indexOf('amp;') != -1){
  56          urlVars[0] = urlVars[0].substring(4);
  57        }
  58        varArray[i] = this.encVar(urlVars[0],urlVars[1]);
  59      }
  60    return varArray.join('&');
  61    };
  62  
  63    this.runResponse = function(){
  64      eval(this.response);
  65    };
  66  
  67    this.runAJAX = function(urlstring){
  68      this.responseStatus = new Array(2);
  69      if(this.failed && this.AjaxFailedAlert){
  70        alert(this.AjaxFailedAlert);
  71      } else {
  72        if (urlstring){
  73          if (this.URLString.length){
  74            this.URLString = this.URLString + "&" + urlstring;
  75          } else {
  76            this.URLString = urlstring;
  77          }
  78        }
  79        if (this.encodeURIString){
  80          var timeval = new Date().getTime();
  81          this.URLString = this.encodeURLString(this.URLString);
  82          this.setVar("rndval", timeval);
  83        }
  84        if (this.element) { this.elementObj = document.getElementById(this.element); }
  85        if (this.xmlhttp) {
  86          var self = this;
  87          if (this.method == "GET") {
  88            var totalurlstring = this.requestFile + "?" + this.URLString;
  89            this.xmlhttp.open(this.method, totalurlstring, true);
  90          } else {
  91            this.xmlhttp.open(this.method, this.requestFile, true);
  92          }
  93          if (this.method == "POST"){
  94            try {
  95               this.xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=UTF-8');
  96            } catch (e) {}
  97          }
  98  
  99          this.xmlhttp.onreadystatechange = function() {
 100            switch (self.xmlhttp.readyState){
 101              case 1:
 102                self.onLoading();
 103              break;
 104              case 2:
 105                self.onLoaded();
 106              break;
 107              case 3:
 108                self.onInteractive();
 109              break;
 110              case 4:
 111                self.response = self.xmlhttp.responseText;
 112                self.responseXML = self.xmlhttp.responseXML;
 113                self.responseStatus[0] = self.xmlhttp.status;
 114                self.responseStatus[1] = self.xmlhttp.statusText;
 115                self.onCompletion();
 116                if(self.execute){ self.runResponse(); }
 117                if (self.elementObj) {
 118                  var elemNodeName = self.elementObj.nodeName;
 119                  elemNodeName.toLowerCase();
 120                  if (elemNodeName == "input" || elemNodeName == "select" || elemNodeName == "option" || elemNodeName == "textarea"){
 121                    self.elementObj.value = self.response;
 122                  } else {
 123                    self.elementObj.innerHTML = self.response;
 124                  }
 125                }
 126                self.afterCompletion();
 127                self.URLString = "";
 128              break;
 129            }
 130          };
 131          this.xmlhttp.send(this.URLString);
 132        }
 133      }
 134    };
 135  this.createAJAX();
 136  }