补齐之前的完整版ajaxfileupload.js

骑猪看日落 2021-04-27 15:13 431阅读 0赞

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 = $('<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);
            //改版
            if(typeof(fileElementId) == 'string'){
                fileElementId = "["+fileElementId+"]";
            }
            var file_array = fileElementId.toString().split(",");
            $.each(file_array,function(i){
                var oldElement = jQuery('#' + file_array[i]);
                jQuery(oldElement).appendTo(form);
            });
            //set attributes
            $(form).css('position', 'absolute');
            $(form).css('top', '-1200px');
            $(form).css('left', '-1200px');
            $(form).appendTo('body');
            return form;
        },
        addOtherRequestsToForm: function(form,data)
        {
            // add extra parameter
            var originalElement = $('<input type="hidden" name="" value="">');
            for (var key in data) {
                name = key;
                value = data[key];
                var cloneElement = originalElement.clone();
                cloneElement.attr({'name':name,'value':value});
                $(cloneElement).appendTo(form);
            }
            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);
            if ( s.data ) form = jQuery.addOtherRequestsToForm(form,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
                            {
                                $(io).remove();
                                $(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 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, 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;
                // 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" )
                {
                    // If you add mimetype in your response,
                    // you have to delete the '<pre></pre>' tag.
                    // The pre tag in Chrome has attribute, so have to use regex to remove
                    var data = r.responseText;
                    var rx = new RegExp("<pre.*?>(.*?)</pre>","i");
                    var am = rx.exec(data);
                    //this is the desired data extracted
                    var data = (am) ? am[1] : "";    //the only submatch or empty
                    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;
            }
        })