图片上传（ajaxFileUpload组件上传）
用组件实现图片上传的时候，从网上下载下来的js文件里的有些部分需要改的动，不然会出现返回的数据是连标签在内的整个数据。
在html文件中：
<input type="file" tabindex="3" title="支持jpg、jpeg、gif、png格式，文件小于5M" size="3" name="pic" class="filePrew" id="uploadfile">
<button id="ubtn" class="btn_addPic" style="display:none">上传</button>
<script src="__PUBLIC__/js/jquery-1.8.0.js"></script>
<script src="__PUBLIC__/js/ajaxfileupload.js"></script>
<script type="text/javascript">
function ajaxFileUpload (){
$.ajaxFileUpload ({
url :"<{:U('Index/upload')}>",
secureuri :false,
fileElementId :'uploadfile',
dataType : 'json',
success : function (data, status){
alert(data);
return false;
// if(typeof(data.error) != 'undefined'){
// if(data.error != ''){
// alert(data.error);
// }else{
// alert(data.msg);
// }
// }
},
error: function (data, status, e){
alert(e);
}
});
}
</script>
在后台php文件中：
<?php
public function upload(){
$upload = new \Think\Upload();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->exts = array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型
$upload->rootPath = './Upload/'; // 设置附件上传根目录
$upload->savePath = ''; // 设置附件上传（子）目录
// 上传文件
$info = $upload->upload();
$url=$info['pic']['savepath'].$info['pic']['savename'];
$roomid=$_SESSION['ingame'];
$id=$_SESSION['id'];
$gameinfo=M('game_log')->where('id='.$roomid)->find();
if($gameinfo['creatorid']==$id && !empty($url)){
$data['res_img1']=$url;
$query=M('game_log')->where(array('creatorid'=>$id,'id'=>$roomid))->save($data);
}
else if($gameinfo['challengerid']==$id && !empty($url)){
$data['res_img2']=$url;
$query=M('game_log')->where(array('challengerid'=>$id,'id'=>$roomid))->save($data);
}
if($query && $url!=''){
echo "上传成功";
}
else{
echo "上传失败";
}
}
?>
下面附上js文件的完整代码（黄色部分是要改的代码）
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);
//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);
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';
}
$(form).submit();
} catch(e)
{
jQuery.handleError(s, xml, null, e);
}
if(window.attachEvent){
document.getElementById(frameId).attachEvent('onload', uploadCallback);
}
else{
document.getElementById(frameId).addEventListener('load', uploadCallback, false);
}
return {abort: function () {}};
},
// uploadHttpData: function( r, type ) {
// var data = !type;
// data = type == "xml" || data ? r.responseXML : r.responseText;
// // If the type is "script", eval it in global context
// if ( type == "script" )
// jQuery.globalEval( data );
// // Get the JavaScript object, if JSON is used.
// if ( type == "json" )
// eval( "data = " + data );
// // evaluate scripts within html
// if ( type == "html" )
// jQuery("<div>").html(data).evalScripts();
// //alert($('param', data).each(function(){alert($(this).attr('value'));}));
// return data;
// }
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" ) {
////////////以下为新增代码///////////////
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);
}
}
///////////以上为新增代码///////////////
eval( "data = " + data);
}
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();
return data;
}
})
