Golang ContactDB.SearchBySatelliteId方法代碼示例

func getLatestIQDataHandler(
	sdb *db.StationDB, cdb *db.ContactDB,
	w http.ResponseWriter, r *http.Request) {

	log.Printf("Request: %s", r.URL.String())

	req, err := parseGetLatestIQDataRequest(r.URL.Query())
	if err != nil {
		log.Printf("getLatestIQDataHandler: "+
			"parse request error: %s", err.Error())
		http.Error(w, "Error parsing request.",
			http.StatusBadRequest)
		return
	}

	sat := db.GlobalSatelliteDB().Map[req.SatelliteId]
	if sat == nil {
		http.Error(w, "Unknown satellite_id.", http.StatusBadRequest)
		return
	}

	station, err := sdb.Lookup(req.StationId)
	if err != nil {
		log.Printf("Error looking up station: %s", err.Error())
		http.Error(w, "", http.StatusUnauthorized)
		return
	}
	if station == nil {
		log.Printf("Error looking up station.")
		http.Error(w, "", http.StatusUnauthorized)
		return
	}
	// Authenticate the station.
	if station.Secret == nil || *station.Secret != req.StationSecret {
		log.Printf("Authentication failed.")
		http.Error(w, "", http.StatusUnauthorized)
		return
	}

	// Make sure that the user is authorized for the satellite.
	found_good_id := false
	for _, station_id := range sat.AuthorizedStationId {
		if station_id == *station.Id {
			found_good_id = true
		}
	}
	if !found_good_id {
		log.Printf("Authentication failed.")
		http.Error(w, "", http.StatusUnauthorized)
		return
	}

	contacts, err := cdb.SearchBySatelliteId(req.SatelliteId, req.Limit)
	if err != nil {
		log.Printf("getLatestIQDataHandler: "+
			"SearchBySatelliteId error: %s", err.Error())
		http.Error(w, "", http.StatusInternalServerError)
		return
	}

	packets := make(GetLatestIQDataResponse, 0)

	for _, c := range contacts {
		if c.StartTimestamp == nil {
			continue
		}
		timestamp := *c.StartTimestamp
		for _, b := range c.Blob {
			if len(packets) >= req.Limit {
				continue
			}

			if b.Format == nil ||
				*b.Format != pb.Contact_Blob_IQ {
				continue
			}

			var p IQLink
			p.Timestamp = timestamp
			p.URL = scheduler.GetStreamURL(*c.Id)

			if b.IqParams != nil {
				if b.IqParams.Type != nil {
					p.Type = b.IqParams.Type.String()
				}
				if b.IqParams.SampleRate != nil {
					p.SampleRate = int(
						*b.IqParams.SampleRate)
				}
			}

			packets = append(packets, p)
		}
	}

	json_body, err := json.Marshal(packets)
	if err != nil {
		log.Printf("json Marshal error: %s", err.Error())
		http.Error(w, "", http.StatusInternalServerError)
	}
//.........這裏部分代碼省略.........

func satelliteViewHandler(
	cdb *db.ContactDB, userdb *db.UserDB, stationdb *db.StationDB,
	commentdb *db.CommentDB,
	w http.ResponseWriter, r *http.Request, user userView) {

	if len(r.URL.Path) < len(satelliteURLPrefix) {
		http.Error(w, "Invalid path", http.StatusBadRequest)
		return
	}
	id := r.URL.Path[len(satelliteURLPrefix):]

	sat := db.GlobalSatelliteDB().Map[id]
	if sat == nil {
		http.NotFound(w, r)
		return
	}

	// TODO: It would be better if we could restrict to contacts which
	// have telemetry.
	contacts, err := cdb.SearchBySatelliteId(id, 100)
	if err != nil {
		log.Printf("cdb.SearchBySatelliteId error: %s", err.Error())
		// Continue since this isn't a critical error.
	}

	t := make([]pb.TelemetryDatum, 0)
	var latest_contact *contactView
	for _, c := range contacts {
		for _, b := range c.Blob {
			if b.Format != nil &&
				*b.Format == pb.Contact_Blob_DATUM {
				t = append(t, *b.Datum)
				if latest_contact == nil {
					latest_contact = fillContactView(
						*c, userdb)
				}
			}
		}
	}

	sv := satelliteViewContext{}
	sv.S = sat
	if sat.Schema != nil {
		t := fe_telemetry.RenderTelemetry(*sat.Schema, t, "en")
		if len(t) > 0 {
			sv.TelemetryHead = t[0]
		}
		if len(t) > 1 {
			sv.TelemetryTail = t[1:]
		}
	}
	sv.LatestContact = latest_contact

	sv.Comments, _ = LoadCommentsByObjectId(
		satelliteObjectId(id), commentdb, userdb)

	sv.Stations, err = stationdb.UserStations(user.Id)
	if err != nil {
		log.Printf("Error getting user stations: %s", err.Error())
		// Continue rendering since it's not a critial error.
	}

	c := NewRenderContext(user, &sv)
	err = satelliteViewTemplate.Get().ExecuteTemplate(
		w, "satellite.html", c)
	if err != nil {
		log.Printf("Error rendering satellite view: %s", err.Error())
		http.Error(w, "", http.StatusInternalServerError)
		return
	}
}