AJAX plugin by Ivan Skvortsov
Tính đến
Script này sẽ không được không được cài đặt trực tiếp. Nó là một thư viện cho các script khác để bao gồm các chỉ thị meta
// @require https://update.greatest.deepsurf.us/scripts/31953/209386/AJAX%20plugin%20-%20SkIvLib.js
// ==UserScript==
// @name AJAX plugin - SkIvLib
// @description AJAX plugin by Ivan Skvortsov
// @description:ru AJAX плагин от Ivan Skvortsov
// @include *://*
// @author Ivan Skvortsov
// @version 1.0.1
// @grant none
// ==/UserScript==
var SkIvLib = {};
(function(){
if( !clog )
var clog = console.log;
var factory = [], queue = [], request_in_progress = false, queue_cleaned = true;
function queue_status()
{
return "queue_status:\n" +
"queue.length = " + queue.length + "\n" +
"in_progress = " + request_in_progress + "\n" +
"cleaned = " + queue_cleaned + "\n" +
"--------------";
}
function request_status( request )
{
return "request_status:\n" +
"method = " + request.method + "\n" +
"url = " + request.url + "\n" +
"async = " + request.async + "\n" +
"data = " + request.data + "\n" +
"onload = " + request.onload + "\n" +
"--------------";
}
function createNewObject( obj )
{
var new_obj = {}, key, val;
for( key in obj )
{
val = obj[key];
if( Object.prototype.hasOwnProperty.call(obj, key) && val !== null )
new_obj[key] = val;
}
return new_obj;
}
function initXHttpFactory()
{
if( factory && factory.length > 0 )
return;
clog( "initXHttpFactory : " + (factory ? factory.length : 0) );
factory = [
function(){ return new XMLHttpRequest();},
function(){ return new ActiveXObject('Msxml3.XMLHTTP');},
function(){ return new ActiveXObject('Msxml2.XMLHTTP.6.0');},
function(){ return new ActiveXObject('Msxml2.XMLHTTP.3.0');},
function(){ return new ActiveXObject('Msxml2.XMLHTTP');},
function(){ return new ActiveXObject('Microsoft.XMLHTTP');},
];
}
function createXHttp()
{
clog("createXHttp");
initXHttpFactory();
for( let i = 0; i < factory.length; ++i )
{
try{
return factory[i]();
}catch(error){}
}
console.error("[createXHttp] can't create xhttp object");
return null;
}
function ObjectToDataString( obj )
{
if( typeof obj === 'object' )
{
var data_str = '', val, key;
for( key in obj )
{
val = obj[key];
if( !Object.prototype.hasOwnProperty.call(obj, key) || !val )
continue;
data_str += key + '=' + val + '&';
}
return data_str.slice(0, -1);
}
else if( typeof obj === 'string' )
return obj;
else
return ( obj ? (obj.toString && obj.toString()) : '' );
}
function getXHttpRequest()
{
clog("getXHttpRequest : queue.length = " + queue.length);
var request = queue[0];
request.method = request.method || 'GET';
if( request.method.toUpperCase() === 'GET' && request.data && request.data !== '' )
{
request.url += '?' + request.data;
request.data = '';
}
request.async = (request.async || true);
clog( request_status(request) );
return request;
}
function handleXHttpEvent( type, xhttp, request, event )
{
if( queue_cleaned )
return;
clog("handleXHttpEvent : url=" + request.url + ", type=" + type + "" +
", readyState=" + xhttp.readyState + ", status=" + xhttp.status );
var context, response;
if( request[type] )
{
response = {
lengthComputable: xhttp.lengthComputable || event.lengthComputable || null,
loaded: xhttp.loaded || event.loaded || 0,
readyState: xhttp.readyState,
responseHeaders: xhttp.responseHeaders ||
(typeof xhttp.getAllResponseHeaders === 'function' ? xhttp.getAllResponseHeaders() : null ) || '',
responseText: xhttp.responseText || xhttp.response,
status: xhttp.status,
statusText: xhttp.statusText,
total: xhttp.total || event.total || 0,
url: xhttp.finalUrl || request.url,
};
context = request.context || response;
request[type].call( context, response );
if( type === 'onerror' || type === 'onload' )
{
request_in_progress = false;
request.delay = request.delay > 20 ? request.delay : 20;
setTimeout( XHttpRequest, request.delay );
}
}
}
function initXHttpEvents( xhttp, request )
{
clog("initXHttpEvents: ", xhttp);
var types = [
'onerror',
'onload',
'onloadend',
'onloadstart',
'onprogress',
'onreadystatechange',
];
function setXHttpEventListener(type){
xhttp[type] = function(event){ handleXHttpEvent(type, xhttp, request, event); };
}
types.forEach( setXHttpEventListener );
}
function initXHttp( xhttp, request )
{
initXHttpEvents( xhttp, request );
for( let key in request.headers )
{
xhttp.setRequestHeader( key, request.headers[key] );
}
}
function XHttpRequest()
{
clog("---> XHttpRequest <---");
var request, xhttp;
request = getXHttpRequest();
if( request && (request_in_progress === false || request.async === true) && queue.length > 0 )
{
queue.shift();
request_in_progress = true;
xhttp = createXHttp();
initXHttp( xhttp, request );
clog("XHttpRequest : url=" + request.url +
", readyState=" + xhttp.readyState + ", status=" + xhttp.status );
xhttp.open( request.method, request.url, request.async );
xhttp.send( request.data || null );
}
}
function addXHttpRequest( ...args )
{
var request, url, settings;
switch( args.length )
{
case 0: return;
case 1:
request = args[0];
clog('request: ', request);
if( request.length )
request.forEach( function(req){ queue.push(req);} );
else
queue.push(request);
//queue_cleaned = false;
break;
case 2:
url = args[0];
settings = args[1];
clog('request: url=' + url + ', settings: ', settings);
if( url.length )
url.forEach( function(u){queue.push(makeXHttpRequest(u, settings));});
else
queue.push( makeXHttpRequest(url, settings) );
//queue_cleaned = false;
break;
default:
return;
//throw new Error("[addXHttpRequest] invalid arguments length: " + args.length );
}
/*
if( request && request.length )
{
request.forEach( function(req){ queue.push(req);} );
}
else if( request )
{
queue.push(request);
}
else if( url && url.length )
{
url.forEach( function(u){queue.push(makeXHttpRequest(u, settings));});
}
else if( url )
{
queue.push( makeXHttpRequest(url, settings) );
}
else
throw new Error("addXHttpRequest] can't add request, args: " + args);
*/
queue_cleaned = false;
}
function makeXHttpRequest( url, settings )
{
var request = createNewObject(settings);
request.url = url;
return request;
}
function cleanXHttpQueue()
{
queue.length = 0;
request_in_progress = false;
queue_cleaned = true;
}
function queueLength()
{
return queue.length;
}
// AJAX API
SkIvLib.ajaxClean = cleanXHttpQueue;
SkIvLib.ajaxLength = queueLength;
SkIvLib.ajaxStatus = queue_status;
SkIvLib.ajaxAddXHR = addXHttpRequest;
SkIvLib.ajax = function(...args)
{
clog('SkIvLib.ajax');
addXHttpRequest(...args);
XHttpRequest;
}
})();