//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/classes/http-request [v1.0]

HTTPRequest = function(){};
with({$: HTTPRequest.prototype}){
	$.isSupported = function(){
		return !!this.getConnection();
	};
	$.events = ["start", "open", "send", "load", "end"];
	$.filter = encodeURIComponent;
	$.getConnection = function(){
		var i, o = [function(){return new ActiveXObject("Msxml2.XMLHTTP");},
		function(){return new ActiveXObject("Microsoft.XMLHTTP");},
		function(){return new XMLHttpRequest;}];
		for(i = o.length; i--;) try{return o[i]();} catch(e){}
		return null;
	};
	$.formatParams = function(params){
		var i, r = [];
		for(i in params) r[r.length] = i + "=" + (this.filter ? this.filter(params[i]) : params[i]);
		return r.join("&");
	};
	$.get = function(url, params, handler, waitResponse){
		return this.request("GET", url + (url.indexOf("?") + 1 ? "&" : "?") + this.formatParams(params), null, handler, null, waitResponse);
	};
	$.post = function(url, params, handler, waitResponse){
		return this.request("POST", url, params = this.formatParams(params), handler, {
			"Connection": "close",
			"Content-Length": params.length,
			"Method": "POST " + url + " HTTP/1.1",
			"Content-Type": "application/x-www-form-urlencoded; charset=utf-8"
		}, waitResponse);
	};
	$.request = function(method, url, params, handler, headers, waitResponse){
		var i, o = this.getConnection(), f = handler instanceof Function;
		try{
			o.open(method, url, !waitResponse);
			waitResponse || (o.onreadystatechange = function(){
				var s = $.events[o.readyState];
				f ? handler(o) : s in handler && handler[s](o);
			});
			o.setRequestHeader("HTTP_USER_AGENT", "XMLHttpRequest");
			for(i in headers)
				o.setRequestHeader(i, headers[i]);
			o.send(params);
			waitResponse && (f ? handler(o) : handler["end"] && handler["end"](o));
			return true;
		}
		catch(e){
			return false;
		}
	};
}

<fieldset>
	<legend>HTTPRequest example</legend>
	<input type="button" value="POST request with generic listener and params passage" onclick="genericHandler()" />
	<br /><input type="button" value="GET request with specific listener (binded on load and end)" onclick="specificHandler()" />

<script type="text/javascript">
//<![CDATA[

var r = new HTTPRequest;

function myHandler(o){
	alert("Current event = " + r.events[o.readyState] +
	"\nAvailable \"responseText.length\" = " + o.responseText.length);
}
function genericHandler(){
	r.post(location.href, {param: "abcde", name: "Jonas", site: "http://jsfromhell.com"}, myHandler);
}
function specificHandler(){
	r.get(location.href, null, {"load": myHandler, "end": myHandler});
}
document.write(
	"<br />Supports XMLHTTPRequest = ".bold() + r.isSupported(),
	"<br />Encoded with the default filter (\"encodeURIComponent\") = ".bold() + r.formatParams({nameA: "aeiou", nameB: "áéíóú"})
);

r.filter = escape;
document.write("<br />Encoded with \"escape\" filter = ".bold() + r.formatParams({nameA: "aeiou", nameB: "áéíóú"}));

r.filter = null;
document.write("<br />Encoded with no filtering = ".bold() + r.formatParams({nameA: "aeiou", nameB: "áéíóú"}));

//]]>
</script>
</fieldset>

$r = &new Request(POST_METHOD | GET_METHOD);
#$r = &new Request(POST_METHOD); //just post
#$r = &new Request(GET_METHOD); //just get =b

if($r->has('name'))
  echo $r->get('name'), $r->name;

echo $r->get('year', '2006');

if($r->isPosted())
  echo 'This was a post =b';


if($r->isFile('file'))
  if($r->file->isUploaded()){
    echo 'The file was uploaded';
    if($r->file->hasError())
      echo 'And there was an error when uploading';
    else{
      echo 'Moving ' . $r->file->path;
      $r->file->save('uploads/' . $r->file->name)
    }
  }

<?php
//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com

define('GET_METHOD', 1);
define('POST_METHOD', 2);

class PostedFile{
	var $file, $name, $type, $size, $path, $error;

	function PostedFile(&$f){
		$this->file = &$f;
		$this->name = $f['name'];
		$this->type = $f['type'];
		$this->size = $f['size'];
		$this->path = $f['tmp_name'];
		$this->error = $f['error'];
	}

	function hasError(){
		return $this->isUploaded() && $this->error != UPLOAD_ERR_OK;
	}

	function isUploaded(){
		return $this->error != UPLOAD_ERR_NO_FILE;
	}

	function save($path){
		return @move_uploaded_file($this->path, $path);
	}
}

class Request{
	function &Request($method){
		if(GET_METHOD & $method)
			foreach($_GET as $n=>$v)
				$this->$n = $v;
		if(POST_METHOD & $method){
			foreach($_POST as $n=>$v)
				$this->$n = $v;
			foreach($_FILES as $n=>$v)
				$this->$n = &new PostedFile($v);
		}
		return $this;
	}

	function isFile($name){
		return is_a($this->get($name), 'PostedFile');
	}

	function has($name){
		if(is_array($name)){
			foreach($name as $n)
				if(!isset($this->$n))
					return false;
			return true;
		}
		else
			return isset($this->$name);
	}

	function get($name, $default = null){
		if($this->has($name))
			return $this->$name;
		else
			return $default;
	}

	function isPosted(){
		return $_SERVER['REQUEST_METHOD'] == 'POST' && isset($_SERVER['CONTENT_LENGTH']) && $_SERVER['CONTENT_LENGTH'];
	}
}
?>