Example #1
0
func serverHasBlob(bs blobserver.BlobStatter, br *blobref.BlobRef) (have bool, err os.Error) {
	ch := make(chan blobref.SizedBlobRef, 1)
	go func() {
		err = bs.StatBlobs(ch, []*blobref.BlobRef{br}, 0)
		close(ch)
	}()
	for _ = range ch {
		have = true
	}
	return
}
Example #2
0
func handleStat(conn http.ResponseWriter, req *http.Request, storage blobserver.BlobStatter) {
	if w, ok := storage.(blobserver.ContextWrapper); ok {
		storage = w.WrapContext(req)
	}

	toStat := make([]*blobref.BlobRef, 0)
	switch req.Method {
	case "POST":
		fallthrough
	case "GET":
		camliVersion := req.FormValue("camliversion")
		if camliVersion == "" {
			httputil.BadRequestError(conn, "No camliversion")
			return
		}
		n := 0
		for {
			n++
			key := fmt.Sprintf("blob%v", n)
			value := req.FormValue(key)
			if value == "" {
				n--
				break
			}
			if n > maxStatBlobs {
				httputil.BadRequestError(conn, "Too many stat blob checks")
				return
			}
			ref := blobref.Parse(value)
			if ref == nil {
				httputil.BadRequestError(conn, "Bogus blobref for key "+key)
				return
			}
			toStat = append(toStat, ref)
		}
	default:
		httputil.BadRequestError(conn, "Invalid method.")
		return

	}

	waitSeconds := 0
	if waitStr := req.FormValue("maxwaitsec"); waitStr != "" {
		waitSeconds, _ = strconv.Atoi(waitStr)
		switch {
		case waitSeconds < 0:
			waitSeconds = 0
		case waitSeconds > 30:
			// TODO: don't hard-code 30.  push this up into a blobserver interface
			// for getting the configuration of the server (ultimately a flag in
			// in the binary)
			waitSeconds = 30
		}
	}

	statRes := make([]map[string]interface{}, 0)
	if len(toStat) > 0 {
		blobch := make(chan blobref.SizedBlobRef)
		resultch := make(chan os.Error, 1)
		go func() {
			err := storage.StatBlobs(blobch, toStat, waitSeconds)
			close(blobch)
			resultch <- err
		}()

		for sb := range blobch {
			ah := make(map[string]interface{})
			ah["blobRef"] = sb.BlobRef.String()
			ah["size"] = sb.Size
			statRes = append(statRes, ah)
		}

		err := <-resultch
		if err != nil {
			log.Printf("Stat error: %v", err)
			conn.WriteHeader(http.StatusInternalServerError)
			return
		}
	}

	configer, _ := storage.(blobserver.Configer)
	ret := commonUploadResponse(configer, req)
	ret["stat"] = statRes
	ret["canLongPoll"] = true
	httputil.ReturnJson(conn, ret)
}