1 /* Simple AJAX Code-Kit (SACK) v1.6.1 */

     2 /* ©2005 Gregory Wild-Smith */

     3 /* www.twilightuniverse.com */

     4 /* Software licenced under a modified X11 licence,

     5    see documentation or authors website for more details */

     6 

     7 function sack(file) {

     8 	this.xmlhttp = null;

     9 

    10 	this.resetData = function() {

    11 		this.method = "POST";

    12   		this.queryStringSeparator = "?";

    13 		this.argumentSeparator = "&";

    14 		this.URLString = "";

    15 		this.encodeURIString = true;

    16   		this.execute = false;

    17   		this.element = null;

    18 		this.elementObj = null;

    19 		this.requestFile = file;

    20 		this.vars = new Object();

    21 		this.responseStatus = new Array(2);

    22   	};

    23 

    24 	this.resetFunctions = function() {

    25   		this.onLoading = function() { };

    26   		this.onLoaded = function() { };

    27   		this.onInteractive = function() { };

    28   		this.onCompletion = function() { };

    29   		this.onError = function() { };

    30 		this.onFail = function() { };

    31 	};

    32 

    33 	this.reset = function() {

    34 		this.resetFunctions();

    35 		this.resetData();

    36 	};

    37 

    38 	this.createAJAX = function() {

    39 		try {

    40 			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");

    41 		} catch (e1) {

    42 			try {

    43 				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

    44 			} catch (e2) {

    45 				this.xmlhttp = null;

    46 			}

    47 		}

    48 

    49 		if (! this.xmlhttp) {

    50 			if (typeof XMLHttpRequest != "undefined") {

    51 				this.xmlhttp = new XMLHttpRequest();

    52 			} else {

    53 				this.failed = true;

    54 			}

    55 		}

    56 	};

    57 

    58 	this.setVar = function(name, value){

    59 		this.vars[name] = Array(value, false);

    60 	};

    61 

    62 	this.encVar = function(name, value, returnvars) {

    63 		if (true == returnvars) {

    64 			return Array(encodeURIComponent(name), encodeURIComponent(value));

    65 		} else {

    66 			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);

    67 		}

    68 	}

    69 

    70 	this.processURLString = function(string, encode) {

    71 		encoded = encodeURIComponent(this.argumentSeparator);

    72 		regexp = new RegExp(this.argumentSeparator + "|" + encoded);

    73 		varArray = string.split(regexp);

    74 		for (i = 0; i < varArray.length; i++){

    75 			urlVars = varArray[i].split("=");

    76 			if (true == encode){

    77 				this.encVar(urlVars[0], urlVars[1]);

    78 			} else {

    79 				this.setVar(urlVars[0], urlVars[1]);

    80 			}

    81 		}

    82 	}

    83 

    84 	this.createURLString = function(urlstring) {

    85 		if (this.encodeURIString && this.URLString.length) {

    86 			this.processURLString(this.URLString, true);

    87 		}

    88 

    89 		if (urlstring) {

    90 			if (this.URLString.length) {

    91 				this.URLString += this.argumentSeparator + urlstring;

    92 			} else {

    93 				this.URLString = urlstring;

    94 			}

    95 		}

    96 

    97 		// prevents caching of URLString

    98 		this.setVar("rndval", new Date().getTime());

    99 

   100 		urlstringtemp = new Array();

   101 		for (key in this.vars) {

   102 			if (false == this.vars[key][1] && true == this.encodeURIString) {

   103 				encoded = this.encVar(key, this.vars[key][0], true);

   104 				delete this.vars[key];

   105 				this.vars[encoded[0]] = Array(encoded[1], true);

   106 				key = encoded[0];

   107 			}

   108 

   109 			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];

   110 		}

   111 		if (urlstring){

   112 			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);

   113 		} else {

   114 			this.URLString += urlstringtemp.join(this.argumentSeparator);

   115 		}

   116 	}

   117 

   118 	this.runResponse = function() {

   119 		eval(this.response);

   120 	}

   121 

   122 	this.runAJAX = function(urlstring) {

   123 		if (this.failed) {

   124 			this.onFail();

   125 		} else {

   126 			this.createURLString(urlstring);

   127 			if (this.element) {

   128 				this.elementObj = document.getElementById(this.element);

   129 			}

   130 			if (this.xmlhttp) {

   131 				var self = this;

   132 				if (this.method == "GET") {

   133 					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;

   134 					this.xmlhttp.open(this.method, totalurlstring, true);

   135 				} else {

   136 					this.xmlhttp.open(this.method, this.requestFile, true);

   137 					try {

   138 						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")

   139 					} catch (e) { }

   140 				}

   141 

   142 				this.xmlhttp.onreadystatechange = function() {

   143 					switch (self.xmlhttp.readyState) {

   144 						case 1:

   145 							self.onLoading();

   146 							break;

   147 						case 2:

   148 							self.onLoaded();

   149 							break;

   150 						case 3:

   151 							self.onInteractive();

   152 							break;

   153 						case 4:

   154 							self.response = self.xmlhttp.responseText;

   155 							self.responseXML = self.xmlhttp.responseXML;

   156 							self.responseStatus[0] = self.xmlhttp.status;

   157 							self.responseStatus[1] = self.xmlhttp.statusText;

   158 

   159 							if (self.execute) {

   160 								self.runResponse();

   161 							}

   162 

   163 							if (self.elementObj) {

   164 								elemNodeName = self.elementObj.nodeName;

   165 								elemNodeName.toLowerCase();

   166 								if (elemNodeName == "input"

   167 								|| elemNodeName == "select"

   168 								|| elemNodeName == "option"

   169 								|| elemNodeName == "textarea") {

   170 									self.elementObj.value = self.response;

   171 								} else {

   172 									self.elementObj.innerHTML = self.response;

   173 								}

   174 							}

   175 							if (self.responseStatus[0] == "200") {

   176 								self.onCompletion();

   177 							} else {

   178 								self.onError();

   179 							}

   180 

   181 							self.URLString = "";

   182 							break;

   183 					}

   184 				};

   185 

   186 				this.xmlhttp.send(this.URLString);

   187 			}

   188 		}

   189 	};

   190 

   191 	this.reset();

   192 	this.createAJAX();

   193 }