ajaxFileUpload文件

jQuery.extend({  
      
  
    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;  
                // }  
                  
                //fix ie9 and ie 10-------------  
                if(jQuery.browser.version=="9.0" || jQuery.browser.version=="10.0"){  
                    var 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, tag_name, tag_link, tag_sort, tag_status, tag_id)  
    {  
        //create form     
        var formId = 'jUploadForm' + id;  
        var fileId = 'jUploadFile' + id;  
        //--  
        var tagNameId = 'tag_name' + id;  
        var tagLinkId = 'tag_link' + id;  
        var tagSortId = 'tag_sort' + id;  
        var tagStatusId = 'tag_status' + id;  
        var tagIdId = 'tag_id' + id;  
        //--end  
        var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');   
        var oldElement = $('#' + fileElementId);  
        var newElement = $(oldElement).clone();  
        //--  
        var tagNameElement = '<input type="text" name="tag_name" value="'+tag_name+'">';    
        var tagLinkElement = '<input type="text" name="tag_link" value="'+tag_link+'">';  
        var tagSortElement = '<input type="text" name="tag_sort" value="'+tag_sort+'">';  
        var tagStatusElement = '<input type="text" name="tag_status" value="'+tag_status+'">';  
        var tagIdElement = '<input type="text" name="tag_id" value="'+tag_id+'">';  
        //--end  
        $(oldElement).attr('id', fileId);  
        $(oldElement).before(newElement);  
        $(oldElement).appendTo(form);  
        //--  
        $(tagNameElement).appendTo(form);  
        $(tagLinkElement).appendTo(form);  
        $(tagSortElement).appendTo(form);  
        $(tagStatusElement).appendTo(form);  
        $(tagIdElement).appendTo(form);  
        //--end  
        //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.tag_name, s.tag_link, s.tag_sort, s.tag_status, s.tag_id);  
        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 () {}};   
  
    },  
    handleError: function( s, xhr, status, e ) {
        // If a local callback was specified, fire it
        if ( s.error ) {
            s.error.call( s.context || window, xhr, status, 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" )  {
        	  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);  
        		  }  
        	  } 
            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;  
    }  
})