public function ajaxUploadAction()
{
$field = 'file';
$fileExt = Upload::getFileExt($field);
$fileSize = Upload::getFilesize($field);
$tmpFile = Upload::getTmpName($field);
if (!in_array($fileExt, array('png', 'jpeg', 'jpg', 'gif', 'bmp'))) {
$this->echoJson(1, '只允许jpg,jpeg,bmp,png,gif格式的图片！');
}
if ($fileSize > 102400) {
$this->echoJson(1, '图片大小不能超过100KB！');
}
// 保存头像
$cdnKey = Cdn::uploadLocalFile($tmpFile, $this->loginUserInfo['id'], $fileExt);
UserCommonInterface::save(array('id' => $this->loginUserInfo['id'], 'head_img' => $cdnKey));
// 删除原先的头像
Cdn::delete($this->loginUserInfo['head_img']);
$this->echoJson(0, 'Success!', array('src' => OjCommonHelper::getHeadUrl($cdnKey, $this->loginUserInfo['sex'])));
}
