func (c *serverCodec) ReadRequestHeader(r *rpc.Request) error {
header := wire.RequestHeader{}
err := readRequestHeader(c.r, &header)
if err != nil {
return err
}
c.mutex.Lock()
c.seq++
c.pending[c.seq] = header.GetId()
r.ServiceMethod = header.GetMethod()
r.Seq = c.seq
c.mutex.Unlock()
c.reqHeader = header
return nil
}
