func GetPeerInfo(file string, addr string) (*PeerInfo, error) {
peerInfo := &PeerInfo{}
dialer := &net.Dialer{
Timeout: 5 * time.Second,
}
conn, err := dialer.Dial("tcp", addr)
if err != nil {
return nil, err
}
_, err = conn.Write([]byte(" V1"))
if err != nil {
return nil, err
}
cmd := common.Lookup(file)
_, err = cmd.WriteTo(conn)
if err != nil {
return nil, err
}
resp, err := proto.ReadResponse(conn)
if err != nil {
println("receive error response")
return nil, err
}
println(string(resp))
err = json.Unmarshal(resp, peerInfo)
if err != nil {
return nil, err
}
return peerInfo, nil
}
func (lp *lookupPeer) Command(cmd *common.Command) ([]byte, error) {
state := lp.state
//init or reconnect
if lp.state != stateConnected {
err := lp.Connect()
if err != nil {
return nil, err
}
lp.state = stateConnected
lp.Write([]byte(" V1"))
if state == stateDisconnected {
lp.connectCallback(lp)
}
}
if cmd == nil {
return nil, nil
}
_, err := cmd.WriteTo(lp)
if err != nil {
lp.Close()
return nil, err
}
data, err := proto.ReadResponse(lp)
if err != nil {
lp.Close()
return nil, err
}
return data, nil
}