| // +build ignore,OMIT |
| |
| package download |
| |
| func (s *Server) handleDownload(w http.ResponseWriter, r *http.Request) { |
| s.addActiveDownloadTotal(1) |
| defer s.addActiveDownloadTotal(-1) |
| if !isGetOrHead(w, r) { |
| return |
| } |
| uctx, err := s.newUserContext(r) |
| // ... |
| pl, cacheable, err := s.chooseValidPayloadToDownload(uctx) |
| // ... |
| content, err := pl.content() |
| // ... |
| defer content.Close() |
| w.Header().Set("Content-Type", pl.mimeType()) |
| if etag := pl.etag(); etag != "" { |
| w.Header().Set("Etag", strconv.Quote(etag)) |
| } |
| if cacheable { |
| w.Header().Set("Expires", pl.expirationTime()) |
| } |
| readSeeker := io.NewSectionReader(content, 0, content.Size()) |
| http.ServeContent(w, r, "", pl.lastModifiedTime(), readSeeker) |
| } |
