func forwardUserRequest(dispatcherHost string, m *piazza.Message) (*piazza.Message, error) {
log.Printf("forwarding user request")
buf, err := m.ToBytes()
var buff = bytes.NewBuffer(buf)
if err != nil {
return nil, err
}
resp, err := http.Post(dispatcherHost, "application/json", buff)
if err != nil {
return nil, err
}
defer resp.Body.Close()
// resp has a message of type CreateJobResponsePayload, with the id filled in
buff = new(bytes.Buffer)
buff.ReadFrom(resp.Body)
m2, err := piazza.NewMessageFromBytes(buff.Bytes())
if err != nil {
return nil, err
}
log.Printf("returning request response")
return m2, nil
}
// send a message to the dispatcher
func (proxy *GatewayProxy) Send(m *piazza.Message) (piazza.PiazzaId, error) {
log.Print("(GatewayProxy.Send)")
url := fmt.Sprintf("%s/message", proxy.DispatcherHost)
buf, err := m.ToBytes()
if err != nil {
return "", err
}
buff := bytes.NewBuffer(buf)
resp, err := http.Post(url, "application/json", buff)
if err != nil {
return "", err
}
defer resp.Body.Close()
buf, err = ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
var obj piazza.Message
err = json.Unmarshal(buf, &obj)
if err != nil {
return "", err
}
status := obj.CreateJobResponsePayload.JobStatus
if status != piazza.JobStatusSubmitted {
return "", errors.New(fmt.Sprintf("bad job status: %v", status))
}
pid := obj.CreateJobResponsePayload.JobId
return pid, nil
}