/* phprpc_client.js - JavaScript PHPRPC Client
*
* Copyright Ma Bingyao <andot@ujn.edu.cn>
* Version: 2.1
* LastModified: 2006-06-17
* This library is free. You can redistribute it and/or modify it.
*/
/*
* Interfaces:
* phprpc_client.create('rpc');
* rpc.use_service('http://domain.com/phprpc/server.php');
* rpc.method_callback = function(result, args, output) {
* if (result instanceof phprpc_error) {
* alert(result.errstr);
* }
* else {
* alert(result); // or do any other things.
* }
* }
* ....
* if (rpc.ready) rpc.method();
*/
function phprpc_error(errno, errstr) {
this.errno = errno;
this.errstr = errstr;
}
function phprpc_client() {
this.__url = '';
this.__encrypt = false;
this.encrypt = 0;
this.ready = false;
this.ajax = true;
this.__get_mode = function (url) {
var protocol = null;
var host = null;
if (url.substr(0, 7) == "http://") {
protocol = "http:";
host = url.substring(7, url.indexOf('/', 7));
}
else if (url.substr(0, 8) == "https://") {
protocol = "https:";
host = url.substring(8, url.indexOf('/', 8));
}
if ((protocol == null && host == null) ||
(protocol == window.location.protocol && host == window.location.host)) {
try {
var xmlhttp = this.__create_xmlhttp();
delete(xmlhttp);
this.ajax = true;
}
catch(e) {
this.ajax = false;
}
}
else {
this.ajax = false;
}
}
this.use_service = function (url, encrypt) {
if (typeof(encrypt) == "undefined") {
encrypt = this.__encrypt;
}
else if (typeof(encrypt) == "boolean") {
this.__encrypt = encrypt;
}
if (typeof(this.__name) == "undefined") {
return false;
}
this.__url = url;
this.ready = false;
this.__get_mode(url);
if (this.ajax) {
var xmlhttp = this.__create_xmlhttp();
var __rpc = this;
var __run = false;
if (encrypt === true) {
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200 && __run == false) {
__run = true;
if (xmlhttp.responseText) {
eval(xmlhttp.responseText);
if (typeof(phprpc_encrypt) == "undefined") {
__rpc.__encrypt = false;
__rpc.use_service(__rpc.__url);
}
else {
__rpc.use_service(__rpc.__url, num2dec(__rpc.__get_key(__rpc)).replace(/\+/g, '%2B'));
}
}
delete(xmlhttp);
}
}
}
else {
var __run = false;
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200 && __run == false) {
__run = true;
if (xmlhttp.responseText) {
eval(xmlhttp.responseText);
__rpc.__create_functions(__rpc);
}
}
delete(xmlhttp);
}
}
xmlhttp.open("GET", this.__url + '?phprpc_encrypt=' + encrypt + '&phprpc_encode=false', true);
xmlhttp.send(null);
}
else {
var id = this.__create_id();
var callback;
if (this.__encrypt) {
callback = base64encode(utf16to8([this.__name, ".__switch_key('", id, "');"].join('')));
}
else {
callback = base64encode(utf16to8([this.__name, ".__get_functions('", id, "');"].join('')));
}
var request = ['phprpc_encrypt=', this.__encrypt,
'&phprpc_callback=', callback,
'&phprpc_encode=false'].join('');
this.__append_script(id, request);
}
return true;
}
this.__get_key = function (rpc) {
rpc.__encrypt = unserialize(phprpc_encrypt);
rpc.__encrypt['p'] = dec2num(rpc.__encrypt['p']);
rpc.__encrypt['g'] = dec2num(rpc.__encrypt['g']);
rpc.__encrypt['y'] = dec2num(rpc.__encrypt['y']);
rpc.__encrypt['x'] = rand(127, 1);
var key = pow_mod(rpc.__encrypt['y'],
rpc.__encrypt['x'],
rpc.__encrypt['p']);
key = num2str(key);
var n = 16 - key.length;
var k = [];
for (var i = 0; i < n; i++) {
k[i] = '\0';
}
k[n] = key;
rpc.__encrypt['k'] = k.join('');
return pow_mod(rpc.__encrypt['g'],
rpc.__encrypt['x'],
rpc.__encrypt['p']);
}
this.__switch_key = function (id) {
if (typeof(phprpc_encrypt) == "undefined") {
this.__encrypt = false;
this.__get_functions(id);
}
else {
this.__remove_script(id);
var callback = base64encode(utf16to8([this.__name, ".__get_functions('", id, "');"].join('')));
var request = ['phprpc_encrypt=', num2dec(this.__get_key(this)),
'&phprpc_callback=', callback,
'&phprpc_encode=false'].join('');
this.__append_script(id, request);
}
}
this.__create_functions = function (rpc) {
var functions = unserialize(phprpc_functions);
var func = [];
var n = functions.length;
for (var i = 0; i < n; i++) {
func[i] = [rpc.__name, ".", functions[i],
" = function () {\r\n this.__call('",
functions[i],
"', this.__args_to_array(arguments));\r\n}\r\n",
rpc.__name, ".", functions[i],
".ref = false;\r\n"].join('');
}
eval(func.join(''));
rpc.ready = true;
if (typeof(rpc.onready) == "function") {
rpc.onready();
}
}
this.__get_functions = function (id) {
this.__create_functions(this);
this.__remove_script(id);
}
this.__call = function (func, args) {
var __args = serialize(args);
if ((this.__encrypt !== false) && (this.encrypt > 0)) {
__args = xxtea_encrypt(__args, this.__encrypt['k']);
}
__args = base64encode(__args);
var request = ['phprpc_func=', func,
'&phprpc_args=', __args,
'&phprpc_encode=false',
'&phprpc_encrypt=', this.encrypt];
var ref = eval(this.__name + "." + func + ".ref");
if (!ref) {
request[request.length] = '&phprpc_ref=false';
}
if (this.ajax) {
var xmlhttp = this.__create_xmlhttp();
var session = {'args': args, 'ref': ref, 'encrypt': this.encrypt, 'run': false};
var __rpc = this;
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200 && session.run == false) {
session.run = true;
if (xmlhttp.responseText) {
eval(xmlhttp.responseText);
var callback = eval(__rpc.__name + "." + func + "_callback");
__rpc.__get_result(session.encrypt, session.ref, session.args, callback);
}
delete(xmlhttp);
}
}
xmlhttp.open("POST", this.__url, true);
xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
xmlhttp.send(request.join('').replace(/\+/g, '%2B'));
}
else {
var id = this.__create_id();
var callback = this.__name + "." + func + "_callback";
if (typeof(eval(callback)) != "function") {
callback = "null";
}
callback = this.__name + ".__callback('" + id + "', " + callback + ");"
request[request.length] = '&phprpc_callback=';
request[request.length] = base64encode(utf16to8(callback));
this.__append_script(id, request.join(''), args, ref);
}
};
this.__get_result = function(encrypt, ref, args, callback) {
if (args[args.length - 1].constructor == Function) {
callback = args[args.length - 1];
}
if (typeof(callback) == "function") {
phprpc_warning = null;
if ((phprpc_errno != 1) && (phprpc_errno != 16) &&
(phprpc_errno != 64) && (phprpc_errno != 256)) {
if ((this.__encrypt !== false) && (encrypt > 0)) {
if (encrypt > 1) {
phprpc_result = xxtea_decrypt(phprpc_result, this.__encrypt['k']);
}
if (ref) {
phprpc_args = xxtea_decrypt(phprpc_args, this.__encrypt['k']);
}
}
phprpc_result = unserialize(phprpc_result);
if (ref) {
phprpc_args = unserialize(phprpc_args);
}
else {
phprpc_args = args;
}
phprpc_warning = new phprpc_error(phprpc_errno, phprpc_errstr);
}
else {
phprpc_result = new phprpc_error(phprpc_errno, phprpc_errstr);
phprpc_args = args;
}
callback(phprpc_result, phprpc_args, phprpc_output, phprpc_warning);
}
}
this.__callback = function (id, callback) {
var script = document.getElementById("script_" + id);
this.__get_result(script.encrypt, script.ref, script.args, callback);
this.__remove_script(id);
}
// the function __create_xmlhttp modified from
// http://webfx.eae.net/dhtml/xmlextras/xmlextras.html and
// http://www.ugia.cn/?p=85
this.__create_xmlhttp = function() {
if (window.XMLHttpRequest) {
var objXMLHttp = new XMLHttpRequest();
// some older versions of Moz did not support the readyState property
// and the onreadystate event so we patch it!
if (objXMLHttp.readyState == null) {
objXMLHttp.readyState = 0;
objXMLHttp.addEventListener(
"load",
function () {
objXMLHttp.readyState = 4;
if (typeof(objXMLHttp.onreadystatechange) == "function") {
objXMLHttp.onreadystatechange();
}
},
false
);
}
return objXMLHttp;
}
else {
var MSXML = ['MSXML2.XMLHTTP.5.0', 'MSXML2.XMLHTTP.4.0', 'MSXML2.XMLHTTP.3.0', 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
var n = MSXML.length;
for(var i = 0; i < n; i++) {
try {
return new ActiveXObject(MSXML[i]);
}
catch(e) {}
}
throw new Error("Your browser does not support xmlhttp objects");
}
};
this.__create_id = function () {
return (new Date()).getTime().toString(36) + Math.floor(Math.random() * 100000000).toString(36);
}
this.__append_script = function (id, request, args, ref) {
var script = document.createElement("script");
script.id = "script_" + id;
script.src = this.__url + "?" + request.replace(/\+/g, '%2B');
script.defer = true;
script.type = "text/javascript";
script.args = args;
script.ref = ref;
script.encrypt = this.encrypt;
var head = document.getElementsByTagName("head").item(0);
head.appendChild(script);
}
this.__remove_script = function (id) {
var script = document.getElementById("script_" + id);
var head = document.getElementsByTagName("head").item(0);
head.removeChild(script);
}
this.__args_to_array = function (args) {
var n = args.length;
var argArray = new Array(n);
for (i = 0; i < n; i++) {
argArray[i] = args[i];
}
return argArray;
}
}
phprpc_client.create = function (name, encrypt) {
eval([name, ' = new phprpc_client();', name, '.__name = "', name, '";'].join(''));
if (typeof(encrypt) == "boolean") {
encrypt = true;
eval([name, '.__encrypt = ', encrypt, ';'].join(''));
}
}
