func (self *serverConn) writeDigest(mc *rpc.MessageContainer, extra map[string]string, sz int) error {
digest := &proto.Command{
Type: proto.CMD_DIGEST,
}
params := [4]string{fmt.Sprintf("%v", sz), mc.Id}
if mc.FromUser() {
params[2] = mc.Sender
params[3] = mc.SenderService
digest.Params = params[:4]
} else {
digest.Params = params[:2]
}
msg := mc.Message
header := make(map[string]string, len(extra)+len(msg.Header))
self.digestFielsLock.Lock()
defer self.digestFielsLock.Unlock()
for _, f := range self.digestFields {
if len(msg.Header) > 0 {
if v, ok := msg.Header[f]; ok {
header[f] = v
}
}
if len(extra) > 0 {
if v, ok := extra[f]; ok {
header[f] = v
}
}
}
if len(header) > 0 {
digest.Message = &rpc.Message{
Header: header,
}
}
compress := self.shouldCompress(digest.Message.Size())
return self.cmdio.WriteCommand(digest, compress)
}
