// HttpRequest library by Juerg Lehni, http://www.scratchdisk.com/
//
// Inspired by:
//
// XHConn - Simple XMLHTTP Interface by bfults@gmail.com
// HTMLHttpRequest v1.0 beta2, (c) Angus Turnbull, TwinHelix Designs http://www.twinhelix.com
// PORK.iframe by Jelle Ursem, http://beta.zapguide.nl/iframe/
var ua = navigator.userAgent, av = navigator.appVersion;
var is = {
win: /Win/.test(ua),
mac: /Mac/.test(ua),
ie: !window.opera && /MSIE/.test(ua),
ie5: !window.opera && /MSIE 5.0/.test(av)
};
var _requests = {};
var _requestId = 0;
function HttpRequest() {
this.id = 'request_' + _requestId++;
_requests[this.id] = this;
this.body = document.body ? document.body : document.getElementsByTagName('body').item(0);
var d = document.createElement('div');
d.style.position = "absolute";
d.style.top = "0";
d.style.marginLeft = "-10000px";
this.body.appendChild(d);
if (is.ie) {
d.innerHTML = '';
} else {
var f = document.createElement("iframe");
f.setAttribute("name", this.id);
f.setAttribute("id", this.id);
var obj = this;
f.addEventListener("load", function() { obj.onLoad(); }, false);
d.appendChild(f);
}
this.frame = window.frames[this.id] || document.getElementById(this.id);
this.frameDiv = d;
}
HttpRequest.prototype.send = function(url, method, params, onComplete) {
method = method ? method.toUpperCase() : "GET";
var form;
params = params || {};
if (params.elements) { // a form
form = params;
} else {
var pos = url.indexOf('?');
if (pos > 0) {
// convert query strings back to param lists, as the values would be ignored on some browsers otherwise
var ps = url.substring(pos + 1).split('&');
for (var i in ps) {
var p = ps[i].split('=');
params[p[0]] = unescape(p[1]);
}
url = url.substring(0, pos);
}
// create form entries for each value
var s = '';
for (var i in params)
s += '';
var d = document.createElement('div');
d.style.visibility = 'hidden';
d.innerHTML = ''; // min. one empty input for MACIE
form = d.firstChild;
this.body.appendChild(d);
this.formDiv = d;
}
// Opera fix: force the frame to render
this.frameDiv.offsetWidth;
form.target = this.id;
form.action = url;
form.method = method;
if (is.ie5) {
if (is.mac)
form.enctype = method == "GET" ? "application/x-www-form-urlencoded" : "multipart/form-data";
this.checkRef = "_requests['" + this.id + "'].checkFrame()";
setTimeout(this.checkRef, 50);
}
this.url = url;
this.onComplete = onComplete;
form.submit();
}
HttpRequest.prototype.onLoad = function() {
var docs = [
this.frame.contentDocument, // NS6
this.frame.contentWindow, // IE5.5 and IE6
this.frame // IE5
];
var text;
for (var i in docs) {
try {
var d = docs[i].document;
text = d.body.innerHTML;
d.close();
break;
} catch(e) {}
}
if (text == null) {
try {
text = window.frames[this.id].document.body.innerText;
} catch(e) {}
}
if (text != null) {
// first tag in IE ends up in , safe it
this.onComplete(text.replace(/<\/TITLE>/gi, "").replace(/^(<HEAD>([\s\S]*)<\/HEAD>\s*<BODY>|<BODY>)([\s\S]*)<\/BODY>$/gi, "$2$3"));
if (this.formDiv) {
this.body.removeChild(this.formDiv);
this.formDiv = null;
}
var obj = this;
setTimeout(function() { obj.body.removeChild(obj.frameDiv) }, 5000); // some browsers need this object around for a while...
}
}
HttpRequest.prototype.checkFrame = function() {
var l = this.frame.location;
if ((l && l.href ? l.href.match(this.url) : 1) && this.frame.document.readyState == 'complete') {
this.onLoad();
} else {
setTimeout(this.checkRef, 50);
}
}