ajaxFileUpload 上傳檔案/圖片，傳引數，解決第二次無法上傳問題
阿新 • • 發佈：2019-01-27
html:
<script charset="utf-8" src="js/ajaxfileupload.js"></script>
<input style="display:;" type="file" id="userfile" onchange="ajaxFileUpload('userfile')" value="" name="userfile" />
Javascript:
var count = 1; function ajaxFileUpload(id){ count++; //圖片格式驗證 var x = $('#'+id); if (!x || !x.val()) return; var patn = /\.jpg$|\.jpeg$|\.png$|\.gif$/i; if (!patn.test(x.val())) { alert("您選擇的不是圖片"); x.val() = ""; return; } $.ajaxFileUpload({ url: "upload.php",//上傳的url，自己設定 type: 'post', secureuri: false, //一般設定為false fileElementId: id, // 上傳檔案的id、name屬性名 dataType: 'text', //返回值型別，一般設定為json、application/json data: {'userfile':id,'time':new Date().getTime()},//傳參 success: function (data, status) { data = data.replace(/<.*?>/g,''); var obj = eval('(' + data + ')'); if(obj.url == ''){ alert(obj.msg); return; } $('#userfile').attr('title',count); }, error: function (data, status, e) { //alert('[未知錯誤]'+e); $('#userfile').attr('title',count); } }); //return false; }
* 加上 $('#userfile').attr('title',count); 這句，解決第二次上傳同一個檔名的檔案沒有反應的問題。
// JavaScript Document jQuery.extend({ createUploadIframe: function(id, uri) { //create frame var frameId = 'jUploadFrame' + id; if(window.ActiveXObject) { if(jQuery.browser.version=="9.0") { io = document.createElement('iframe'); io.id = frameId; io.name = frameId; } else if(jQuery.browser.version=="6.0"||jQuery.browser.version=="7.0"||jQuery.browser.version=="8.0") { 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,data) { //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); /* var oldElement = jQuery('#' + fileElementId); var newElement = oldElement.clone(true); newElement[0].files=oldElement[0].files; oldElement.attr('id', fileId); oldElement.before(newElement); oldElement.appendTo(form);*/ //增加文字引數的支援 if (data) { for (var i in data) { $('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').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,s.data); 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" ) { eval( "data = " + data ); } // evaluate scripts within html if( type == "html" ) { jQuery("<div>").html(data).evalScripts(); } return data; } , handleError: function (s, xhr, status, e) { if (s.error) { s.error.call(s.context || s, xhr, status, e); } if (s.global) { (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]); } }, httpData: function (xhr, type, s) { var ct = xhr.getResponseHeader("content-type"), xml = type == "xml" || !type && ct && ct.indexOf("xml") >= 0, data = xml ? xhr.responseXML : xhr.responseText; if (xml && data.documentElement.tagName == "parsererror") throw "parsererror"; if (s && s.dataFilter) data = s.dataFilter(data, type); if (typeof data === "string") { if (type == "script") jQuery.globalEval(data); if (type == "json") data = window["eval"]("(" + data + ")"); } return data; } });