ossphpsdk这里没用问题？

    /**
     * 上传文件，适合比较大的文件
     * @param string $bucket (Required)
     * @param string $object (Required)
     * @param string $file (Required)
     * @param array $options (Optional)
     * @author xiaobing.meng@alibaba-inc.com
     * @since 2012-02-28
     * @return ResponseCore
     */
    public function upload_file_by_file($bucket,$object,$file,$options = NULL){
        //options
        $this->validate_options($options);


        if(!$options){
            $options = array();
        }


        //bucket
        $this->is_empty($bucket,OSS_BUCKET_IS_NOT_ALLOWED_EMPTY);


        //object
        $this->is_empty($object,OSS_OBJECT_IS_NOT_ALLOWED_EMPTY);


        //file
        $this->is_empty($file, OSS_FILE_PATH_IS_NOT_ALLOWED_EMPTY);
        
        if($this->chk_chinese($file)){
            $file = iconv('utf-8','gbk',$file);
        }
        
        $options[self::OSS_FILE_UPLOAD] = $file;
        
        if(!file_exists($options[self::OSS_FILE_UPLOAD])){
            throw new OSS_Exception($options[self::OSS_FILE_UPLOAD].OSS_FILE_NOT_EXIST);
        }
        
        $filesize = filesize($options[self::OSS_FILE_UPLOAD]);
        $partsize = 1024 * 1024 ; //默认为 1M
        
        
        $extension = explode ( '.', $file );
        $extension = array_pop ( $extension );
        $content_type = MimeTypes::get_mimetype(strtolower($extension));
                
        $options[self::OSS_METHOD] = self::OSS_HTTP_PUT;
        $options[self::OSS_BUCKET] = $bucket;
        $options[self::OSS_OBJECT] = $object;
        $options[self::OSS_CONTENT_TYPE] = $content_type;
        $options[self::OSS_CONTENT_LENGTH] = $filesize;
                
        $response = $this->auth($options);
        return $response;
    } [font=微软雅黑, 'Microsoft Yahei', 'Hiragino Sans GB', tahoma, arial, 宋体]上面是alioss php sdk upload_file_by_file的一段代码，如果文件路径编码是utf-8，这里会把file重新编码成gbk，然后下面用重新编码后的字符去查看这个文件是否存在，相当于把传入的路径都改变了，这里一定会导致文件不存在的错误，同样的问题在多个sdk接口里面都是存在的，难道其他人没有遇到过这个问题？
[font=微软雅黑, 'Microsoft Yahei', 'Hiragino Sans GB', tahoma, arial, 宋体]