ajaxFileupload多文件上传

最近有个功能模块需要上传图片，为了和之前的伙伴们保持一致我也使用了ajaxFileupload，

但是源码只支持单文件上传，所以百般斟酌之下决定修改源码，废话不多说直接上代码

HTML上传代码段：

<div class="mainmenuone cf">
<ul class="cf">
<li><span><img /><input type="file" class="file" name="file"/></span></li>
</ul>
</div>

<ul class="cf">这里有个ul标签，说明这里添加的是多个，下面这个代码段就是循环加入图片

$(this).prev().attr("src", objUrl);
$(this).parent().parent().append("<i class='cancel'> </i>");
$(".cancel").css({"display":"inline-block"});
$(".mainmenuone ul").append("<li><span><img /><input type='file' class='file' name='file' /></span></li>");
$(".mainmenuone li").css({"height":$(".mainmenuone li").width()+"px"});

AJAX的写法：

$.ajaxFileUpload({
url:'填自己的URL',
secureuri: false,
fileElementIds:'file',
dataType: 'json',
type: 'post',
success: function (data, status){

},
error: function (data, status, e){

}
});

更改后的ajaxFileupload.js

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,fileElementIds,data,fileElement)
    {
        //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;
        if(fileElement == null){
            $("."+fileElementIds).each(function(){
                oldElement =$(this);
                var newElement = jQuery(oldElement).clone();
                  jQuery(oldElement).before(newElement);
                 jQuery(oldElement).appendTo(form);
                 oldElement=null;
            });
        }
        else
        oldElement = fileElement;
        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.fileElementIds, (typeof(s.data)=='undefined'?false:s.data),s.fileElement);
        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(){
            try
            {
                jQuery('#' + frameId).remove();
                jQuery(form).remove();
            }
            catch(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" )
            //eval( "data = " + data );
            data = jQuery.parseJSON(jQuery(data).text());
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("<div>").html(data).evalScripts();

        return data;
    },

    handleError: function( s, xml, status, e ) {
        // If a local callback was specified, fire it
        if ( s.error )
            s.error( xml, status, e );

        // Fire the global callback
        if ( s.global )
            jQuery.event.trigger( "ajaxError", [xml, s, e] );
    }
});