ajaxfileupload控制很好用，不过发现上传文件后的结果为被浏览器处理，IE不会，谷哥和火狐都会进行处理，而且谷哥和火狐处理后的结果都不一样，这里对以上三种浏览器进行了兼容性调整。
jQuery.extend({
createUploadIframe: function(id, uri)
{
//create frame
var frameId = 'jUploadframe' + id;
var iframeHtml = '').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 );
if ( type == "json" ){
var reg ="";
if(data.indexOf("")>-1){
reg=/(.+)
/g;
}else{
reg=/(.+) /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("").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] );
}
});
更多精彩内容请参考专题《ajax上传技术汇总》，《javascript文件上传操作汇总》和《jQuery上传操作汇总》进行学习。
以上就是本文的全部内容，希望对大家的学习有所帮助。
