// ExtractKey extract key for dispatch backend server
ExtractKey extract key for dispatch backend server
// ExtractKey extract key for dispatch backend server
func ExtactKey(frame []byte) (key []byte, err error) {
	reader := NewReader(bytes.NewReader(frame))
	reader.readLine()
	reader.readLine()
	reader.readLine()
	reader.readLine()
	key, err = reader.readLine()
	if err != nil {
		return nil, err
	}
	key = key[:len(key)-2]
	return
}
func ExtactKey ( frame [ ] byte ) ( key [ ] byte , err error ) { reader := NewReader ( bytes . NewReader ( frame ) ) reader . readLine ( ) reader . readLine ( ) reader . readLine ( ) reader . readLine ( ) key , err = reader . readLine ( ) if err != nil { return nil , err } key = key [ : len ( key ) - 2 ] return }
ExtractKey extract key for dispatch backend server
ExtractKey extract key for dispatch backend server
// skip request message length // skip key command length // skip command // skip key  length // take key