//------------------------------------------------------------------------------ /** @author Бреславский А.В. (Joonte Ltd.) */ //------------------------------------------------------------------------------ $Links = {}; //------------------------------------------------------------------------------ var HTTP = function(){ //---------------------------------------------------------------------------- // Ресурс HTTP соединения this.Resource = null; // Идентификатор ссылки в глобальном массиве Links this.LinkID = 'HTTP-' + (Math.round(Math.random()*8999) + 1000); // Стэк запросов this.Stack = []; // Свободен ли объект для запроса this.IsFree = true; //---------------------------------------------------------------------------- $Links[this.LinkID] = this; //---------------------------------------------------------------------------- if(window.XMLHttpRequest){ //-------------------------------------------------------------------------- // Mozilla, Safari,... var $Resource = new XMLHttpRequest(); }else{ //-------------------------------------------------------------------------- if(window.ActiveXObject){ // Internet Explorer try{ $Resource = new ActiveXObject('Msxml2.XMLHttp'); }catch(Exception){ //---------------------------------------------------------------------- try{ $Resource = new ActiveXObject('Microsoft.XMLHttp'); }catch(Exception){ //-------------------------------------------------------------------- alert('Ваш браузер не поддерживает Ajax'); //-------------------------------------------------------------------- return false; } } } } //---------------------------------------------------------------------------- this.Resource = $Resource; //---------------------------------------------------------------------------- return true; }; //------------------------------------------------------------------------------ HTTP.prototype.IsCreated = function(){ //---------------------------------------------------------------------------- return Boolean(this.Resource); }; //------------------------------------------------------------------------------ HTTP.prototype.Send = function($Url,$Args){ //---------------------------------------------------------------------------- if(!this.IsCreated()){ //-------------------------------------------------------------------------- Debug('[HTTP::Send]: ресурс на соединение не найден'); //-------------------------------------------------------------------------- return false; } //---------------------------------------------------------------------------- if(!this.IsFree){ //-------------------------------------------------------------------------- this.Stack.push({Url:$Url,Args:$Args}); //-------------------------------------------------------------------------- return true; } //---------------------------------------------------------------------------- if(typeof($Args) != 'object') var $Args = []; //---------------------------------------------------------------------------- var $Request = ''; //---------------------------------------------------------------------------- for(var $i in $Args){ //-------------------------------------------------------------------------- var $Arg = $Args[$i]; //-------------------------------------------------------------------------- if(!['object','string','number'].IsExists(typeof $Arg)) continue; //-------------------------------------------------------------------------- var $Variable = SPrintF('%s=%s',(typeof $Arg != 'object'?$i:$Arg.Name),encodeURIComponent(typeof $Arg != 'object'?$Arg:$Arg.Value)); //-------------------------------------------------------------------------- Debug(SPrintF('Формируем параметр (%s)',$Variable)); //-------------------------------------------------------------------------- $Request += $Variable+'&'; } //---------------------------------------------------------------------------- $Request += 'XMLHttpRequest=yes'; //---------------------------------------------------------------------------- Debug(SPrintF('Осуществлям запрос (%s)',$Url)); //---------------------------------------------------------------------------- var $Resource = this.Resource; //---------------------------------------------------------------------------- $Resource.open('POST',$Url,true); $Resource.onreadystatechange = new Function(SPrintF("if(typeof($Links) != 'undefined') $Links['%s'].Loading();",this.LinkID)); //---------------------------------------------------------------------------- try{ $Resource.setRequestHeader('Method','POST URL HTTP/1.1'); $Resource.setRequestHeader('Content-Type','application/x-www-form-urlencoded; charset=utf-8'); }catch(Exception){ //-------------------------------------------------------------------------- Debug('[HTTP::Send]: не удалось установить заголовки запроса'); //-------------------------------------------------------------------------- return false; } //---------------------------------------------------------------------------- $Resource.send($Request); //---------------------------------------------------------------------------- this.IsFree = false; //---------------------------------------------------------------------------- return true; }; //------------------------------------------------------------------------------ HTTP.prototype.Loading = function(){ //---------------------------------------------------------------------------- if(!this.IsCreated()){ //-------------------------------------------------------------------------- alert('Нет HTTP соединения'); //-------------------------------------------------------------------------- return false; } //---------------------------------------------------------------------------- var $Resource = this.Resource; //---------------------------------------------------------------------------- var $readyState = $Resource.readyState; //---------------------------------------------------------------------------- SetProgress($readyState,4); //---------------------------------------------------------------------------- if($readyState == 4){ //-------------------------------------------------------------------------- try{ var $Status = $Resource.status; }catch(Exeption){ return true; } //-------------------------------------------------------------------------- this.onLoaded(); //-------------------------------------------------------------------------- switch($Status){ case 200: //---------------------------------------------------------------------- $responseText = $Resource.responseText; //---------------------------------------------------------------------- if($responseText){ //-------------------------------------------------------------------- Debug($responseText); //-------------------------------------------------------------------- $Object = JSON_Decode($responseText); if(!$Object){ //------------------------------------------------------------------ Debug('Неверный ответ от сервера. Возможно на стороне сервера произошла критическая ошибка.'); //------------------------------------------------------------------ this.onError(); }else this.onAnswer($Object); }else Debug('Пустой ответ от сервера'); break; case 404: alert('Запрошенный адрес не существует'); break; default: Debug(SPrintF('Сервер вернул код ошибки (%u)',$Status)); } //-------------------------------------------------------------------------- this.IsFree = true; //-------------------------------------------------------------------------- if(this.Stack.length > 0){ //------------------------------------------------------------------------ var $Request = this.Stack[0]; //------------------------------------------------------------------------ if(!this.Send($Request.Url,$Request.Args)) Debug('Не удалось отправить запрос на сервер из стека'); //------------------------------------------------------------------------ this.Stack.shift(); } } }; //------------------------------------------------------------------------------ HTTP.prototype.onLoaded = function(){ //---------------------------------------------------------------------------- // Srcipt... }; //------------------------------------------------------------------------------ HTTP.prototype.onError = function(){ //---------------------------------------------------------------------------- // Srcipt... }; //------------------------------------------------------------------------------ HTTP.prototype.onAnswer = function($Answer){ //---------------------------------------------------------------------------- alert($Answer); }; //------------------------------------------------------------------------------ function AjaxCall($Url,$Args,$Message,$Eval){ //---------------------------------------------------------------------------- var $HTTP = new HTTP(); //---------------------------------------------------------------------------- if(!$HTTP.Resource){ //-------------------------------------------------------------------------- alert('Не удалось создать HTTP соединение'); //-------------------------------------------------------------------------- return false; } //---------------------------------------------------------------------------- $HTTP.onLoaded = function(){ //-------------------------------------------------------------------------- HideProgress(); } //---------------------------------------------------------------------------- $HTTP.onAnswer = function($Answer){ //-------------------------------------------------------------------------- switch($Answer.Status){ case 'Error': ShowAlert($Answer.Error.String,'Warning'); break; case 'Exception': ShowAlert(ExceptionsStack($Answer.Exception),'Warning'); break; case 'Ok': //---------------------------------------------------------------------- if($Eval) eval($Eval); break; default: alert('Не известный ответ'); } }; //---------------------------------------------------------------------------- if(!$HTTP.Send($Url,$Args)){ //-------------------------------------------------------------------------- alert('Не удалось отправить запрос на сервер'); //-------------------------------------------------------------------------- return false; } //---------------------------------------------------------------------------- ShowProgress($Message); }