/**
* Object LoadVars
* Flash MX / MX2004 / 8 LoadVars Object porting for JavaScript
* [ with all its methods and events ]
*
* @author Andrea Giammarchi
* @date 2005/08/09
* @lastmod 2006/05/07 09:00 [add support for KDE 3.5]
* @version 1.1b stable - tested with IE 5.0, 5.5, 6.0, 7 beta2 and FireFox 1.0.6, 1.5.0.2, Opera 8, 8.5 and KDE 3.5
* @documentation http://livedocs.macromedia.com/flash/8/main/00002323.html
* NOTE: documentation is the same of Flash 8 documentation. Only send method is different, because it
* doesn't open a new window, just send data to page (without events ... then for response use sendAndLoad).
* getProgress is an unofficial method, maybe nice for your progress bars :-)
*/
function LoadVars() {
/**
* Public method
* add or modify headers
*/
this.addRequestHeader = function() {
var rqh = [];
if(arguments.length == 1 && typeof(arguments[0]) !== "string") {
for(var a = 0; a < arguments[0].length; a++)
__push(rqh, arguments[0][a]);
}
else if(arguments.length == 2 && typeof(arguments[0]) === "string" && typeof(arguments[1]) === "string") {
__push(rqh, arguments[0]);
__push(rqh, arguments[1]);
};
if(rqh.length > 0 && (rqh.length % 2) == 0)
__headers = rqh;
};
/**
* Public method
* decode a string to internal values
*/
this.decode = function(queryString) {
var pos, key, value,
response = queryString.split("&"),
a = response.length;
while(a) {
if(response[--a] !== '') {
pos = response[a].indexOf("=");
key = response[a].substr(0, pos);
value = response[a].substr((pos + 1), (response[a].length - pos));
this[__decode(key)] = __decode(value);
};
};
};
/**
* Public method
* get loaded bytes (fake value with IE browser)
*/
this.getBytesLoaded = function() {
var result = 0;
if(__bridge.readyState > 2)
result = __checkOnProgress() ? (__bridge.readyState === 3 ? 2 : 4) : __bridge.responseText.length;
return result;
};
/**
* Public method
* get total bytes (fake value with IE browser)
*/
this.getBytesTotal = function() {
var result = 0;
if(__bridge.readyState === 3)
result = __checkOnProgress() ? 4 : __bridge.getResponseHeader("Content-Length");
return result;
};
/**
* Public unofficial method
* get % progress while loading data (fake value with IE browser)
*/
this.getProgress = function() {
return __progress;
};
/**
* Public method
* load a server page (remember to use absolute uri when you try on your browser)
*/
this.load = function(url) {
var self = this,
result = this.loaded = false;
if(__bridge !== null) {
function __load() {
__bridge.open("get", url, true);
__addHeaders(self);
__onProgress(self);
__bridge.send(null);
};
setTimeout(__load, 0);
result = true;
};
return result;
};
/**
* Public method
* send something to the server
*/
this.send = function(url, target, method) {
return this.sendAndLoad(url, null, method);
};
/**
* Public method
* load a server page after sending something
*/
this.sendAndLoad = function(url, target, method) {
var self = this,
result = this.loaded = false,
topage = "";
if(__bridge !== null) {
function __load() {
topage = self.toString();
if(typeof(method) === "string" && method.toLowerCase() === "get") {
__bridge.open("get", url + "?" + topage, true);
__addHeaders(self);
if(__is_a(target, LoadVars))
__onProgress(target);
__bridge.send(null);
}
else {
__bridge.open("post", url, true);
__addHeaders(self);
__bridge.setRequestHeader("Content-Type", self.contentType);
__bridge.setRequestHeader("Content-Length", topage.length);
if(__is_a(target, LoadVars))
__onProgress(target);
__bridge.send(topage);
};
};
setTimeout(__load, 0);
result = true;
}
return result;
};
/**
* Public method
* return text rappresentation of this object
*/
this.toString = function() {
var a = null,
toserver = [];
for(a in this) {
if(!__in_array(a, __private))
__push(toserver, __encode(a) + "=" + __encode(this[a]));
};
return toserver.join("&");
};
/** PUBLIC VARIABLES */
// internal loaded boolean value
this.loaded = false;
// default contentType for POST interaction
this.contentType = "application/x-www-form-urlencoded";
/** LIST OF ALL PRIVATE METHODS [ uncommented ] */
function __addHeaders(self) {
var a, b = __headers.length;
__bridge.setRequestHeader("Connection", "Close");
for(a = 0; a < b; a+=2) {
if(__headers[a].toLowerCase() === "content-type")
self.contentType = __headers[(a+1)];
else
__bridge.setRequestHeader(__headers[a], __headers[(a+1)]);
};
};
function __checkOnProgress() {
return (__ie || typeof(__bridge.responseText) !== "string");
};
function __decode(s) {
return __decodeURIComponent(s);
};
function __decodeURIComponent(s) {
if(__uce === null)
__uce = (typeof(decodeURIComponent) === "function") ? true : false;
return __uce ? decodeURIComponent(s) : unescape(s);
};
function __encode(v) {
var tmp;
switch(v.constructor) {
case Number:
case Boolean:
case String:
tmp = __encodeURIComponent(v.toString());
break;
case Function:
tmp = "[type Function]";
break;
default:
tmp = "[object Object]";
break;
};
return tmp;
};
function __encodeURIComponent(s) {
if(__uce === null)
__uce = (typeof(encodeURIComponent) === "function") ? true : false;
return __uce ? encodeURIComponent(s) : escape(s);
};
function __in_array(elm, ar) {
var found = 1,
a = ar.length;
while(a) {
if(ar[--a] === elm)
found = a = 0;
};
return !found;
};
function __is_a(obj, func) {
return obj.constructor === func;
};
function __isIE() {
var browser = navigator.userAgent.toUpperCase();
return (browser.indexOf("MSIE") >= 0 && browser.indexOf("OPERA") < 0);
};
function __getBridge() {
var XHR = null,
browser = navigator.userAgent.toUpperCase();
if(typeof(XMLHttpRequest) === "function" || typeof(XMLHttpRequest) === "object")
XHR = new XMLHttpRequest();
else if(window.ActiveXObject && browser.indexOf("MSIE 4") < 0) {
if(browser.indexOf("MSIE 5") < 0)
XHR = new ActiveXObject("Msxml2.XMLHTTP");
else
XHR = new ActiveXObject("Microsoft.XMLHTTP");
};
return XHR;
};
function __onProgress(self) {
var interval = 0;
function checkProgress() {
var p;
if(__ie)
p = __m.floor(__progress + ((99 - __progress) * 0.02));
else
p = __m.floor((self.getBytesLoaded() / self.getBytesTotal()) * 100);
__progress = p > 99 ? 99 : p;
};
__bridge.onreadystatechange = function() {
if(__bridge.readyState === 3 && interval === 0)
interval = setInterval(checkProgress, 50);
else if(__bridge.readyState === 4) {
clearInterval(interval);
__progress = 100;
if(typeof(self.onHTTPStatus) === "function")
self.onHTTPStatus(__bridge.status);
if(typeof(self.onData) === "function") {
if(typeof(__bridge.responseText) === "string")
self.onData(__bridge.responseText);
else
self.onData();
};
if(typeof(self.onLoad) === "function") {
if(__bridge.status === 200) {
self.decode(__bridge.responseText);
self.loaded = true;
}
self.onLoad(self.loaded);
};
};
};
__progress = 0;
};
function __push(ar, value) {
if(__ape === null)
__ape = (typeof(ar.push) === "function") ? true : false;
if(__ape)
ar.push(value);
else
ar[ar.length] = value;
};
/** LIST OF ALL PRIVATE VARIABLES [ uncommented ] */
var
__progress = 0,
__uce = __ape = null,
__ie = __isIE(),
__headers = [],
__private = [
"loaded", "contentType",
"addRequestHeader",
"decode",
"getBytesLoaded", "getBytesTotal", "getProgress",
"load", "send", "sendAndLoad",
"toString"
],
__m = Math,
__bridge = __getBridge();
};
