AJAX问题:jQuery.handleError is not a function

本文探讨了解决AjaxFileUpload上传文件时遇到的问题,特别是当服务器返回错误信息时前端无法正确显示的情况。通过更新jQuery版本和修改AjaxFileUpload.js文件来解决此问题。

最近做项目,用ajaxfileupload的$.ajaxFileUpload()方法上传文件,服务器端接受时,如发生错误就将错误提示写入response输出流,然后前端的error方法就会将错误信息显示出来,问题就是,我故意传了一个错误的文件,按理来讲服务端走异常,将错误信息写入response流,并flush,发给浏览器有error方法显示导入出错,但是特什么也没提示,就一直显示"正在上传"。打开调试台,错误为:jQuery.handleError is not a function!

自己百度了一下,大致问题是这样:

ajaxfileupload现在来讲比较古老了,它以来Jquery,而且是1.4.2版本的,那时候1.4.2版本的jQuery有handlerError方法,到了现在的1.9+就没有了,所以会报handlerError找不到的错误,解决方法是:找到ajaxfileupload.js文件,在  " jQuery.extend({   "之后加上一下代码,就可以了!

handleError: function( s, xhr, status, e ){  
        // If a local callback was specified, fire it  
        if ( s.error ) {  
            s.error.call( s.context || s, xhr, status, e );  
        }  
  
        // Fire the global callback  
        if ( s.global ) {  
            (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] );  
        }  
}  

But!!我试过了,还是不行,为什么呢?    因为浏览器缓存了文件,清空一下浏览器的cache再试一下就可以了!

// JavaScript Document jQuery.extend({ handleError: function( s, xhr, status, e ) { // If a local callback was specified, fire it if ( s.error ) { s.error.call( s.context || s, xhr, status, e ); } // Fire the global callback if ( s.global ) { (s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError", [xhr, s, e] ); } }, createUploadIframe: function(id, uri) { //create frame var frameId = 'jUploadFrame' + id; if(window.ActiveXObject) { var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />'); if(typeof uri== 'boolean'){ io.src = 'javascript:false'; } else if(typeof uri== 'string'){ io.src = uri; } } else { var io = document.createElement('iframe'); io.id = frameId; io.name = frameId; } io.style.position = 'absolute'; io.style.top = '-1000px'; io.style.left = '-1000px'; document.body.appendChild(io); return io; }, createUploadForm: function(id, fileElementId) { //create form var formId = 'jUploadForm' + id; var fileId = 'jUploadFile' + id; var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>'); var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); //set attributes jQuery(form).css('position', 'absolute'); jQuery(form).css('top', '-1200px'); jQuery(form).css('left', '-1200px'); jQuery(form).appendTo('body'); return form; }, ajaxFileUpload: function(s) { // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout s = jQuery.extend({}, jQuery.ajaxSettings, s); var id = s.fileElementId; var form = jQuery.createUploadForm(id, s.fileElementId); var io = jQuery.createUploadIframe(id, s.secureuri); var frameId = 'jUploadFrame' + id; var formId = 'jUploadForm' + id; if( s.global && ! jQuery.active++ ) { // Watch for a new set of requests jQuery.event.trigger( "ajaxStart" ); } var requestDone = false; // Create the request object var xml = {}; if( s.global ) { jQuery.event.trigger("ajaxSend", [xml, s]); } var uploadCallback = function(isTimeout) { // Wait for a response to come back var io = document.getElementById(frameId); try { if(io.contentWindow) { xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null; xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document; }else if(io.contentDocument) { xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null; xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document; } }catch(e) { jQuery.handleError(s, xml, null, e); } if( xml || isTimeout == "timeout") { requestDone = true; var status; try { status = isTimeout != "timeout" ? "success" : "error"; // Make sure that the request was successful or notmodified if( status != "error" ) { // process the data (runs the xml through httpData regardless of callback) var data = jQuery.uploadHttpData( xml, s.dataType ); if( s.success ) { // ifa local callback was specified, fire it and pass it the data s.success( data, status ); }; if( s.global ) { // Fire the global callback jQuery.event.trigger( "ajaxSuccess", [xml, s] ); }; } else { jQuery.handleError(s, xml, status); } } catch(e) { status = "error"; jQuery.handleError(s, xml, status, e); }; if( s.global ) { // The request was completed jQuery.event.trigger( "ajaxComplete", [xml, s] ); }; // Handle the global AJAX counter if(s.global && ! --jQuery.active) { jQuery.event.trigger("ajaxStop"); }; if(s.complete) { s.complete(xml, status); } ; jQuery(io).unbind(); setTimeout(function() { try { jQuery(io).remove(); jQuery(form).remove(); } catch(e) { jQuery.handleError(s, xml, null, e); } }, 100); xml = null; }; } // Timeout checker if( s.timeout > 0 ) { setTimeout(function(){ if( !requestDone ) { // Check to see ifthe request is still happening uploadCallback( "timeout" ); } }, s.timeout); } try { var form = jQuery('#' + formId); jQuery(form).attr('action', s.url); jQuery(form).attr('method', 'POST'); jQuery(form).attr('target', frameId); if(form.encoding) { form.encoding = 'multipart/form-data'; } else { form.enctype = 'multipart/form-data'; } jQuery(form).submit(); } catch(e) { jQuery.handleError(s, xml, null, e); } if(window.attachEvent){ document.getElementById(frameId).attachEvent('onload', uploadCallback); } else{ document.getElementById(frameId).addEventListener('load', uploadCallback, false); } return {abort: function () {}}; }, uploadHttpData: function( r, type ) { var data = !type; data = type == "xml" || data ? r.responseXML : r.responseText; // ifthe type is "script", eval it in global context if( type == "script" ) { jQuery.globalEval( data ); } // Get the JavaScript object, ifJSON is used. if( type == "json" ) { data = jQuery.parseJSON(jQuery(data).text()); } // evaluate scripts within html if( type == "html" ) { jQuery("<div>").html(data).evalScripts(); } return data; } }); 这是jQuery里的文件吗
最新发布
07-24
评论 3
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值