jQuery.extend({
createUploadIframe: function(id,uri)
{
//create frame
var frameId = 'jUploadFrame' + id;
if(window.ActiveXObject) {
//fix ie9 and ie 10-------------
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;
}
}
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 = $('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
var oldElement = $('#' + fileElementId);
var newElement = $(oldElement).clone();
$(oldElement).attr('id',fileId);
$(oldElement).before(newElement);
$(oldElement).appendTo(form);
//增加文本参数的支持
if (data) {
for (var i in data) {
$('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
}
}
//set attributes
$(form).css('position','absolute');
$(form).css('top','-1200px');
$(form).css('left','-1200px');
$(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,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",s] );
} else
jQuery.handleError(s,status);
} catch(e)
{
status = "error";
jQuery.handleError(s,status,e);
}
// The request was completed
if( s.global )
jQuery.event.trigger( "ajaxComplete",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
{
$(io).remove();
$(form).remove();
} catch(e)
{
jQuery.handleError(s,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 io = $('#' + frameId);
var form = $('#' + formId);
$(form).attr('action',s.url);
$(form).attr('method','POST');
$(form).attr('target',frameId);
if(form.encoding)
{
form.encoding = 'multipart/form-data';
}
else
{
form.enctype = 'multipart/form-data';
}
$(form).submit();
} catch(e)
{
jQuery.handleError(s,e);
}
if(window.attachEvent){
document.getElementById(frameId).attachEvent('onload',uploadCallback);
}
else{
document.getElementById(frameId).addEventListener('load',uploadCallback,false);
}
return {abort: function () {}};
},handleError: function( s,xhr,e ) {
// If a local callback was specified,fire it
if ( s.error ) {
s.error.call( s.context || s,e );
}
// Fire the global callback
if ( s.global ) {
(s.context ? jQuery(s.context) : jQuery.event).trigger( "ajaxError",[xhr,s,e] );
}
},uploadHttpData: function( r,type ) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script",eval it in global context
if ( type == "script" )
jQuery.globalEval( data );
// Get the JavaScript object,if JSON is used.
if ( type == "json" ){
////////////以下为新增代码///////////////
data = r.responseText;
var start = data.indexOf(">");
if(start != -1) {
var end = data.indexOf("<",start + 1);
if(end != -1) {
data = data.substring(start + 1,end);
}
}
///////////以上为新增代码///////////////
eval( "data = " + data );
}
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();
//alert($('param',data).each(function(){alert($(this).attr('value'));}));
return data;
}
})
原文地址：https://www.jb51.cc/ajax/161176.html
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