jq ajax thinkphp 404,ajax 提交时404错误---ThinkCMFX2.23

public function form_post(){

$file=$_FILES['thumb'];

// 实例化上传类

$upload = new \Think\Upload();

// 设置附件上传大小

$upload->maxSize = 2 * 1024 * 1024;

// 设置附件上传根目录

$upload->rootPath = './';

// 设置附件上传(子)目录

$upload->savePath = 'data/upload/portal/';

$info = $upload->uploadOne($file);

$fileinfo=explode('/', $info['savepath']);

$smeta['thumb']='portal/'.$fileinfo['3'].'/'.$info['savename'];

$termid=I('termid');

$article['post_date']=date('Y-m-d H:i:s',time());

$article['post_title']=I('title');

$article['post_excerpt']=I('excerpt');

$article['post_keyword']=I('keyword');

$article['post_content']=I('content');

$article['smeta']=json_encode($smeta);

$article['post_status']=0;

$article['post_author']=1;

$result=M('posts')->add($article);

$result=M('term_relationships')->add(array("term_id"=>intval($termid),"object_id"=>$result));

if($result){

$this->ajaxReturn(array('msg'=>'提交成功'));

}else{

$this->ajaxReturn(array('msg'=>'提交失败'));

}

}

我本地windows测试可以的

但是放到服务器上就不行了(nginx+liunx)