ajaxFileUpload 实现多文件上传(源码)

jQuery.extend( { ???handleError : function(s, xhr, status, e) { ???????if (s.error) ???????????s.error(xhr, status, e); ???????else if (xhr.responseText) ???????????console.log(xhr.responseText); ???}});jQuery ???????.extend( { ???????????createUploadIframe : function(id, uri) { ???????????????// create frame ???????????var frameId = ‘jUploadFrame‘ + id; ???????????var iframeHtml = ‘<iframe id="‘ + frameId + ‘" name="‘ + frameId ???????????????????+ ‘" style="position:absolute; top:-9999px; left:-9999px"‘; ???????????if (window.ActiveXObject) { ???????????????if (typeof uri == ‘boolean‘) { ???????????????????iframeHtml += ‘ src="‘ + ‘javascript:false‘ + ‘"‘; ???????????????} else if (typeof uri == ‘string‘) { ???????????????????iframeHtml += ‘ src="‘ + uri + ‘"‘; ???????????????} ???????????} ???????????iframeHtml += ‘ />‘; ???????????jQuery(iframeHtml).appendTo(document.body); ???????????return jQuery(‘#‘ + frameId).get(0); ???????}, ???????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>‘); ???????????if (data) { ???????????????for ( var i in data) { ???????????????????jQuery( ???????????????????????????‘<input type="hidden" name="‘ + i + ‘" value="‘ ???????????????????????????????????+ data[i] + ‘" />‘).appendTo(form); ???????????????} ???????????} ???????????/*var oldElement = jQuery(‘#‘ + fileElementId); ???????????var newElement = jQuery(oldElement).clone(); ???????????jQuery(oldElement).attr(‘id‘, fileId); ???????????jQuery(oldElement).before(newElement); ???????????jQuery(oldElement).appendTo(form);*/ ???????????//做一些修改 ???????????for(var i in fileElementId){ ?????????????????var oldElement = jQuery(‘#‘ + fileElementId[i]); ?????????????????var newElement = jQuery(oldElement).clone(); ?????????????????jQuery(oldElement).attr(‘id‘, fileId); ?????????????????jQuery(oldElement).before(newElement); ?????????????????jQuery(oldElement).appendTo(form); ?????????????} ?????????????//end ???????????????????????// 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 = new Date().getTime() ???????????var form = jQuery.createUploadForm(id, s.fileElementId, ???????????????????(typeof (s.data) == ‘undefined‘ ? false : s.data)); ???????????var io = jQuery.createUploadIframe(id, s.secureuri); ???????????var frameId = ‘jUploadFrame‘ + id; ???????????var formId = ‘jUploadForm‘ + id; ???????????// Watch for a new set of requests ???????????if (s.global && !jQuery.active++) { ???????????????jQuery.event.trigger("ajaxStart"); ???????????} ???????????var requestDone = false; ???????????// Create the request object ???????????var xml = {} ???????????if (s.global) ???????????????jQuery.event.trigger("ajaxSend", [ xml, s ]); ???????????// Wait for a response to come back ???????????var uploadCallback = function(isTimeout) { ???????????????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 a local callback was specified, fire it and ???????????????????????????// pass it the data ???????????????????????????if (s.success) ???????????????????????????????s.success(data, status); ???????????????????????????// Fire the global callback ???????????????????????????if (s.global) ???????????????????????????????jQuery.event.trigger("ajaxSuccess", [ xml, s ]); ???????????????????????} else ???????????????????????????jQuery.handleError(s, xml, status); ???????????????????} catch (e) { ???????????????????????status = "error"; ???????????????????????jQuery.handleError(s, xml, status, e); ???????????????????} ???????????????????// The request was completed ???????????????????if (s.global) ???????????????????????jQuery.event.trigger("ajaxComplete", [ xml, s ]); ???????????????????// Handle the global AJAX counter ???????????????????if (s.global && !--jQuery.active) ???????????????????????jQuery.event.trigger("ajaxStop"); ???????????????????// Process result ???????????????????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() { ???????????????????// Check to see if the request is still happening ???????????????????????if (!requestDone) ???????????????????????????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) { ???????????????????jQuery(form).attr(‘encoding‘, ‘multipart/form-data‘); ???????????????} else { ???????????????????jQuery(form).attr(‘enctype‘, ‘multipart/form-data‘); ???????????????} ???????????????jQuery(form).submit(); ???????????} catch (e) { ???????????????jQuery.handleError(s, xml, null, e); ???????????} ???????????jQuery(‘#‘ + frameId).load(uploadCallback); ???????????return { ???????????????abort : function() { ???????????????} ???????????}; ???????}, ???????uploadHttpData : function(r, type) { ???????????var data = !type; ???????????data = type == "xml" || data ? r.responseXML : r.responseText; ???????????// If the type is "script", eval it in global context ???????????if (type == "script") ???????????????jQuery.globalEval(data); ???????????// Get the JavaScript object, if JSON is used. ???????????if (type == "json") ???????????????eval("data = " + data); ???????????// evaluate scripts within html ???????????if (type == "html") ???????????????jQuery("<div>").html(data).evalScripts(); ???????????return data; ???????} ???????})