/***********************************************************\
nAjax - small AJAX kit
Author: Vladas Tomkevicius aka Neodan
Type: tools
Date: 2008-08-13
\***********************************************************/
/************************* Example *************************\
nAjax kurimas ir testavimas
\***********************************************************/
/************************** Manual **************************\
obj - nAjax object
obj.msg(type, message);
send message in to screen;
vars:
type - mesage type [error];
message - message text;
obj.setMethod(method);
set request method;
vars:
method - [ get | post ];
obj.setRequestFile(file);
set request target file;
vars:
file - target file name (http://example.com/file.php);
obj.setCharset(charset);
set request charset
vars:
charset - charset name (utf-8; windows-1257...);
obj.setUrlVar(name, value);
set request var;
vars:
name - var name;
value - var value;
obj.sendRequest();
sending request;
\***********************************************************/
function nAjax(file){
//-> nAjax variables
this.ajaxObj=null;
this.requestFile=file;
this.method="POST";
this.charset="utf-8";
this.URLString="";
this.result="";
this.onLoading = function() { };
this.onLoaded = function() { };
this.onInteractive = function() { };
this.onCompletion = function() { };
//-> message output
this.msg=function(type, message){
if (type=="error"){
message="Error: "+message;
}
alert(message);
};
//-> set request file
this.setRequestFile=function(file){
this.requestFile=file;
};
//-> set method
this.setMethod=function (method){
method=method.toLowerCase();
if (method=="get"){
this.method="GET";
}else if (method=="post"){
this.method="POST";
}else{
this.msg("error","Wrong method!");
}
};
//-> set charset
this.setCharset=function(charset){
this.charset=charset;
};
//-> set url var
this.setUrlVar=function(name, value){
if (this.URLString.length < 3){
this.URLString=name+"="+value;
}else{
this.URLString+="&"+name+"="+value;
}
};
//-> send ajax request
this.sendRequest=function(){
if (this.ajaxObj!=null){
var self=this;
// ruosiamas duomenu issiuntimas, readyState=1
this.ajaxObj.open(this.method, this.requestFile, true);
// POST hederis
this.ajaxObj.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset="+this.charset);
//siunciami duomenys i serva
this.ajaxObj.send(this.URLString);
//
this.ajaxObj.onreadystatechange = function (){
switch (self.ajaxObj.readyState){
case 1:
self.onLoading();
break;
case 2:
self.onLoaded();
break;
case 3:
self.onInteractive();
break;
case 4:
if (self.ajaxObj.status == 200){
self.result=self.ajaxObj.responseText;
self.onCompletion();
}else if (self.ajaxObj.status == 400){
// self.msg("error","Bad request!");
}else if (self.ajaxObj.status == 500){
// self.msg("error","Server error!");
}else if (self.ajaxObj.status == 503){
var time = self.ajaxObj.getResponseHeader('Retry-After')*1000;
// self.msg("error","Serveris perkrautas. Uzklausa bus pasiusta po: "+time+" sekundziu");
setTimeout(self.sendRequest(),time);
}else{
// self.msg("error","Wrong result!");
}
break;
}
};
}
};
//-> create ajax object
this.createAjaxObj=function(){
try {
this.ajaxObj = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
this.ajaxObj = new ActiveXObject("Microsoft.XMLHTTP");
} catch (err) {
try{
this.ajaxObj = new XMLHttpRequest();
} catch(err){
this.ajaxObj=null;
this.msg("error","Can't create ajax object!");
}
}
}
};
this.createAjaxObj();
}