/*
==========================
TSF AJAX Javascript module
==========================
- simple AJAX using a hash table
- utf-8 should be used for non-ascii characters
CLIENT SIDE SCRIPT:
===================
...
...
PHP5 SERVER SIDE:
================
- compile with the "json" extension
$postdata = "";
$in = fopen("php://input", "r");
while(!feof($in)) { $postdata .= fread($in, 4096); }
$in = json_decode($postdata, 1);
$out = array(
"echo" => $in["echo"],
);
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); # disable IE caching
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");
header("Content-Type: text/plain; charset=utf-8");
print json_encode($out);
PERL SERVER SIDE:
=================
- install the JSON cpan module
use JSON;
my $postdata;
while () { $postdata .= $_ }
my $in = JSON::from_json($postdata, 1);
my $out = {
echo => $in->{echo},
};
print "Expires: Mon, 26 Jul 1997 05:00:00 GMT\n"; # disable IE caching
print "Cache-Control: no-cache, must-revalidate\n";
print "Pragma: no-cache\n";
print "Content-Type: text/plain; charset=utf-8\n";
print "\n"; # terminate headers
print JSON::to_json($out);
AUTHOR:
=======
Author: Tomas Styblo
License: GNU GPL
*/
/* plain function */
function AJAXAvailable() {
return (window.ActiveXObject || window.XMLHttpRequest);
}
function AJAX() {
}
AJAX.prototype.available = function () {
return AJAXAvailable();
}
AJAX.prototype.debug = function (msg) {
var li = document.createElement("li");
li.innerHTML = msg + "
\n";
document.body.appendChild(li);
}
AJAX.prototype.sendjson = function (readyFunc, url, data, meta) {
var r = new Object();
r.ready = function (res) {
var data = null;
try {
data = res.status ? res.data.parseJSON() : null;
}
catch (e) {
data = null;
}
readyFunc.call(null, data, res.meta);
};
this.sendraw(r, r.ready, "POST", url, data.toJSONString(), meta);
}
AJAX.prototype.sendraw = function (readyObj, readyMethod, type, url, data, meta) {
// add random string to the URL to prevent caching
if (url.indexOf("?") == -1) {
url += "?" + Math.random();
}
else {
url += "&" + Math.random();
}
if (window.ActiveXObject) {
this.httpRequestor = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
this.httpRequestor = new XMLHttpRequest();
}
else {
throw "this browser has no AJAX implementation";
}
this.processingURL = url;
this.meta = meta;
this.httpRequestor.open(type, url, true);
var thisclosure = this;
this.httpRequestor.onreadystatechange = function () { thisclosure.handler(); };
this.requestReadyObj = readyObj;
this.requestReadyMethod = readyMethod;
// this.httpRequestor.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
this.httpRequestor.setRequestHeader("Content-Type", "text/plain");
this.httpRequestor.send(data);
return true;
}
AJAX.prototype.handler = function () {
if (this.httpRequestor.readyState == 4) {
var input = this.httpRequestor.responseText;
if (this.httpRequestor.status == 200) {
this.requestReadyMethod.call(this.requestReadyObj, {
"status" : true,
"data" : input,
"meta" : this.meta
});
}
else {
var error = this.processingURL + ":" + this.httpRequestor.status + " " + this.httpRequestor.statusText + "\n\n" + input;
this.requestReadyMethod.call(this.requestReadyObj, {
"status" : false,
"error" : error,
"meta" : this.meta
});
}
}
}