engine_tooklit_process_handler.go

// handleProcess runs the incoming chunk through an exif decoder and
// writes the results to the response.
func handleProcess(w http.ResponseWriter, r *http.Request) {
	startOffsetMS, err := strconv.Atoi(r.FormValue("startOffsetMS"))
	if err != nil {
		http.Error(w, "exif: "+err.Error(), http.StatusBadRequest)
		return
	}
	endOffsetMS, err := strconv.Atoi(r.FormValue("endOffsetMS"))
	if err != nil {
		http.Error(w, "exif: "+err.Error(), http.StatusBadRequest)
		return
	}
	f, _, err := r.FormFile("chunk")
	if err != nil {
		http.Error(w, "exif: "+err.Error(), http.StatusBadRequest)
		return
	}
	defer f.Close()
	var resp response
	resp.Series = []item{{
		StartTimeMs: startOffsetMS,
		EndTimeMs:   endOffsetMS,
	}}
	x, err := exif.Decode(f)
	if err != nil {
		resp.Series[0].Vendor.ExifError = err.Error()
	}
	resp.Series[0].Vendor.Exif = x
	if err := json.NewEncoder(w).Encode(resp); err != nil {
		fmt.Fprintf(os.Stderr, "%s", err)
	}
}