ajax檔案上傳成功 解決瀏覽器相容問題

NO IMAGE

ajaxfileupload控制很好用,不過發現上傳檔案後的結果為被瀏覽器處理,IE不會,谷哥和火狐都會進行處理,而且谷哥和火狐處理後的結果都不一樣,這裡對以上三種瀏覽器進行了相容性調整。


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,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)
oldElement = jQuery('#'   fileElementId);
else
oldElement = fileElement;
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
//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),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)
console.log( jQuery.uploadHttpData);
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 ="";
data = (type == "xml" ? r.responseXML : r.responseText);
if ( type == "script" )
jQuery.globalEval( data );
/**
* auth garen 2016-06-17
* 對檔案上傳後的響應結果進行處理,支援IE FF GC
* */
if ( type == "json" ){
var reg ="";
if(data.indexOf("<pre>")>-1){
reg=/<pre>(. )<\/pre>/g;
}else{  
reg=/<pre. ?>(. )<\/pre>/g; 
}
var result = data.match(reg);
var stri1=RegExp.$1; 
if(stri1!=null&&stri1!="" &&stri1.trim().length>0){
data = stri1;  
}
eval( "data ="   data);
}
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] );
}
});

更多精彩內容請參考專題《ajax上傳技術彙總》《javascript檔案上傳操作彙總》《jQuery上傳操作彙總》進行學習。