예제 #1
0
// ServeHTTP handles all incoming HTTP requests for this data.
func (d *Data) ServeHTTP(uuid dvid.UUID, ctx *datastore.VersionedCtx, w http.ResponseWriter, r *http.Request) {
	timedLog := dvid.NewTimeLog()
	// versionID := ctx.VersionID()

	// Get the action (GET, POST)
	action := strings.ToLower(r.Method)

	// Break URL request into arguments
	url := r.URL.Path[len(server.WebAPIPath):]
	parts := strings.Split(url, "/")
	if len(parts[len(parts)-1]) == 0 {
		parts = parts[:len(parts)-1]
	}

	// Handle POST on data -> setting of configuration
	if len(parts) == 3 && action == "put" {
		config, err := server.DecodeJSON(r)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.ModifyConfig(config); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := datastore.SaveDataByUUID(uuid, d); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		fmt.Fprintf(w, "Changed '%s' based on received configuration:\n%s\n", d.DataName(), config)
		return
	}

	if len(parts) < 4 {
		server.BadRequest(w, r, "Incomplete API request")
		return
	}

	// Process help and info.
	switch parts[3] {
	case "help":
		w.Header().Set("Content-Type", "text/plain")
		fmt.Fprintln(w, dtype.Help())

	case "info":
		jsonBytes, err := d.MarshalJSON()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, string(jsonBytes))

	case "sync":
		if action != "post" {
			server.BadRequest(w, r, "Only POST allowed to sync endpoint")
			return
		}
		replace := r.URL.Query().Get("replace") == "true"
		if err := datastore.SetSyncByJSON(d, uuid, replace, r.Body); err != nil {
			server.BadRequest(w, r, err)
			return
		}

	case "label":
		if action != "get" {
			server.BadRequest(w, r, "Only GET action is available on 'label' endpoint.")
			return
		}
		if len(parts) < 5 {
			server.BadRequest(w, r, "Must include label after 'label' endpoint.")
			return
		}
		label, err := strconv.ParseUint(parts[4], 10, 64)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if label == 0 {
			server.BadRequest(w, r, "Label 0 is protected background value and cannot be used for query.")
			return
		}
		queryStrings := r.URL.Query()
		jsonBytes, err := d.GetLabelJSON(ctx, label, queryStrings.Get("relationships") == "true")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		if _, err := w.Write(jsonBytes); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: get synaptic elements for label %d (%s)", r.Method, label, r.URL)

	case "tag":
		if action != "get" {
			server.BadRequest(w, r, "Only GET action is available on 'tag' endpoint.")
			return
		}
		if len(parts) < 5 {
			server.BadRequest(w, r, "Must include tag string after 'tag' endpoint.")
			return
		}
		tag := Tag(parts[4])
		queryStrings := r.URL.Query()
		jsonBytes, err := d.GetTagJSON(ctx, tag, queryStrings.Get("relationships") == "true")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		if _, err := w.Write(jsonBytes); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: get synaptic elements for tag %s (%s)", r.Method, tag, r.URL)

	case "elements":
		switch action {
		case "get":
			// GET <api URL>/node/<UUID>/<data name>/elements/<size>/<offset>
			if len(parts) < 6 {
				server.BadRequest(w, r, "Expect size and offset to follow 'elements' in GET request")
				return
			}
			sizeStr, offsetStr := parts[4], parts[5]
			ext3d, err := dvid.NewExtents3dFromStrings(offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			elements, err := d.GetRegionSynapses(ctx, ext3d)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			w.Header().Set("Content-type", "application/json")
			jsonBytes, err := json.Marshal(elements)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if _, err := w.Write(jsonBytes); err != nil {
				server.BadRequest(w, r, err)
				return
			}
			timedLog.Infof("HTTP %s: synapse elements in subvolume (size %s, offset %s) (%s)", r.Method, sizeStr, offsetStr, r.URL)

		case "post":
			if err := d.StoreSynapses(ctx, r.Body); err != nil {
				server.BadRequest(w, r, err)
				return
			}
		default:
			server.BadRequest(w, r, "Only GET or POST action is available on 'elements' endpoint.")
			return
		}

	case "element":
		// DELETE <api URL>/node/<UUID>/<data name>/element/<coord>
		if action != "delete" {
			server.BadRequest(w, r, "Only DELETE action is available on 'element' endpoint.")
			return
		}
		if len(parts) < 5 {
			server.BadRequest(w, r, "Must include coordinate after DELETE on 'element' endpoint.")
			return
		}
		pt, err := dvid.StringToPoint3d(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.DeleteElement(ctx, pt); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: delete synaptic element at %s (%s)", r.Method, pt, r.URL)

	case "move":
		// POST <api URL>/node/<UUID>/<data name>/move/<from_coord>/<to_coord>
		if action != "post" {
			server.BadRequest(w, r, "Only POST action is available on 'move' endpoint.")
			return
		}
		if len(parts) < 6 {
			server.BadRequest(w, r, "Must include 'from' and 'to' coordinate after 'move' endpoint.")
			return
		}
		fromPt, err := dvid.StringToPoint3d(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		toPt, err := dvid.StringToPoint3d(parts[5], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.MoveElement(ctx, fromPt, toPt); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: move synaptic element from %s to %s (%s)", r.Method, fromPt, toPt, r.URL)

	default:
		server.BadAPIRequest(w, r, d)
	}
}
예제 #2
0
파일: labelblk.go 프로젝트: jmptrader/dvid
// ServeHTTP handles all incoming HTTP requests for this data.
func (d *Data) ServeHTTP(uuid dvid.UUID, ctx *datastore.VersionedCtx, w http.ResponseWriter, r *http.Request) {
	// TODO -- Refactor this method to break it up and make it simpler.  Use the web routing for the endpoints.

	timedLog := dvid.NewTimeLog()

	// Get the action (GET, POST)
	action := strings.ToLower(r.Method)
	switch action {
	case "get":
	case "post":
	case "delete":
	default:
		server.BadRequest(w, r, "labelblk only handles GET, POST, and DELETE HTTP verbs")
		return
	}

	// Break URL request into arguments
	url := r.URL.Path[len(server.WebAPIPath):]
	parts := strings.Split(url, "/")
	if len(parts[len(parts)-1]) == 0 {
		parts = parts[:len(parts)-1]
	}

	// Get query strings and possible roi
	var roiptr *imageblk.ROI
	queryValues := r.URL.Query()
	roiname := dvid.InstanceName(queryValues.Get("roi"))
	if len(roiname) != 0 {
		roiptr = new(imageblk.ROI)
	}

	// Handle POST on data -> setting of configuration
	if len(parts) == 3 && action == "post" {
		config, err := server.DecodeJSON(r)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.ModifyConfig(config); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := datastore.SaveDataByUUID(uuid, d); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		fmt.Fprintf(w, "Changed '%s' based on received configuration:\n%s\n", d.DataName(), config)
		return
	}

	if len(parts) < 4 {
		server.BadRequest(w, r, "Incomplete API request")
		return
	}

	// Process help and info.
	switch parts[3] {
	case "help":
		w.Header().Set("Content-Type", "text/plain")
		fmt.Fprintln(w, dtype.Help())

	case "metadata":
		jsonStr, err := d.NdDataMetadata()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.dvid-nd-data+json")
		fmt.Fprintln(w, jsonStr)

	case "info":
		jsonBytes, err := d.MarshalJSON()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, string(jsonBytes))

	case "label":
		// GET <api URL>/node/<UUID>/<data name>/label/<coord>
		if len(parts) < 5 {
			server.BadRequest(w, r, "DVID requires coord to follow 'label' command")
			return
		}
		coord, err := dvid.StringToPoint(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		label, err := d.GetLabelAtPoint(ctx.VersionID(), coord)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		jsonStr := fmt.Sprintf(`{"Label": %d}`, label)
		fmt.Fprintf(w, jsonStr)
		timedLog.Infof("HTTP %s: label at %s (%s)", r.Method, coord, r.URL)

	case "labels":
		// POST <api URL>/node/<UUID>/<data name>/labels
		if action != "post" {
			server.BadRequest(w, r, "Batch labels query must be a POST request")
			return
		}
		data, err := ioutil.ReadAll(r.Body)
		if err != nil {
			server.BadRequest(w, r, "Bad POSTed data for batch reverse query.  Should be JSON.")
			return
		}
		var coords []dvid.Point3d
		if err := json.Unmarshal(data, &coords); err != nil {
			server.BadRequest(w, r, fmt.Sprintf("Bad labels request JSON: %v", err))
			return
		}
		w.Header().Set("Content-type", "application/json")
		fmt.Fprintf(w, "[")
		sep := false
		for _, coord := range coords {
			label, err := d.GetLabelAtPoint(ctx.VersionID(), coord)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if sep {
				fmt.Fprintf(w, ",")
			}
			fmt.Fprintf(w, "%d", label)
			sep = true
		}
		fmt.Fprintf(w, "]")
		timedLog.Infof("HTTP batch label-at-point query (%d coordinates)", len(coords))

	case "blocks":
		// DELETE <api URL>/node/<UUID>/<data name>/blocks/<block coord>/<spanX>
		if len(parts) < 6 {
			server.BadRequest(w, r, "DVID requires starting block coord and # of blocks along X to follow 'blocks' endpoint.")
			return
		}
		blockCoord, err := dvid.StringToChunkPoint3d(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		span, err := strconv.Atoi(parts[5])
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if action != "delete" {
			server.BadRequest(w, r, "DVID currently accepts only DELETE on the 'blocks' endpoint")
			return
		}
		if err := d.DeleteBlocks(ctx, blockCoord, span); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: delete %d blocks from %s (%s)", r.Method, span, blockCoord, r.URL)

	case "pseudocolor":
		if len(parts) < 7 {
			server.BadRequest(w, r, "'%s' must be followed by shape/size/offset", parts[3])
			return
		}
		shapeStr, sizeStr, offsetStr := parts[4], parts[5], parts[6]
		planeStr := dvid.DataShapeString(shapeStr)
		plane, err := planeStr.DataShape()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		switch plane.ShapeDimensions() {
		case 2:
			slice, err := dvid.NewSliceFromStrings(planeStr, offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if action != "get" {
				server.BadRequest(w, r, "DVID does not permit 2d mutations, only 3d block-aligned stores")
				return
			}
			lbl, err := d.NewLabels(slice, nil)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if roiptr != nil {
				roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), lbl)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			img, err := d.GetImage(ctx.VersionID(), lbl, roiptr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}

			// Convert to pseudocolor
			pseudoColor, err := colorImage(img)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}

			//dvid.ElapsedTime(dvid.Normal, startTime, "%s %s upto image formatting", op, slice)
			var formatStr string
			if len(parts) >= 8 {
				formatStr = parts[7]
			}
			err = dvid.WriteImageHttp(w, pseudoColor, formatStr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			timedLog.Infof("HTTP %s: %s (%s)", r.Method, plane, r.URL)
		default:
			server.BadRequest(w, r, "DVID currently supports only 2d pseudocolor image requests")
			return
		}

	case "raw", "isotropic":
		if len(parts) < 7 {
			server.BadRequest(w, r, "'%s' must be followed by shape/size/offset", parts[3])
			return
		}
		var isotropic bool = (parts[3] == "isotropic")
		shapeStr, sizeStr, offsetStr := parts[4], parts[5], parts[6]
		planeStr := dvid.DataShapeString(shapeStr)
		plane, err := planeStr.DataShape()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		switch plane.ShapeDimensions() {
		case 2:
			slice, err := dvid.NewSliceFromStrings(planeStr, offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if action != "get" {
				server.BadRequest(w, r, "DVID does not permit 2d mutations, only 3d block-aligned stores")
				return
			}
			rawSlice, err := dvid.Isotropy2D(d.Properties.VoxelSize, slice, isotropic)
			lbl, err := d.NewLabels(rawSlice, nil)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if roiptr != nil {
				roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), lbl)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			img, err := d.GetImage(ctx.VersionID(), lbl, roiptr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if isotropic {
				dstW := int(slice.Size().Value(0))
				dstH := int(slice.Size().Value(1))
				img, err = img.ScaleImage(dstW, dstH)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			var formatStr string
			if len(parts) >= 8 {
				formatStr = parts[7]
			}
			//dvid.ElapsedTime(dvid.Normal, startTime, "%s %s upto image formatting", op, slice)
			err = dvid.WriteImageHttp(w, img.Get(), formatStr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			timedLog.Infof("HTTP %s: %s (%s)", r.Method, plane, r.URL)
		case 3:
			queryStrings := r.URL.Query()
			throttle := queryStrings.Get("throttle")
			if throttle == "true" || throttle == "on" {
				select {
				case <-server.Throttle:
					// Proceed with operation, returning throttle token to server at end.
					defer func() {
						server.Throttle <- 1
					}()
				default:
					throttleMsg := fmt.Sprintf("Server already running maximum of %d throttled operations",
						server.MaxThrottledOps)
					http.Error(w, throttleMsg, http.StatusServiceUnavailable)
					return
				}
			}
			compression := queryValues.Get("compression")
			subvol, err := dvid.NewSubvolumeFromStrings(offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if action == "get" {
				lbl, err := d.NewLabels(subvol, nil)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				if roiptr != nil {
					roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), lbl)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
				}
				data, err := d.GetVolume(ctx.VersionID(), lbl, roiptr)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				w.Header().Set("Content-type", "application/octet-stream")
				switch compression {
				case "":
					_, err = w.Write(data)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
				case "lz4":
					compressed := make([]byte, lz4.CompressBound(data))
					var n, outSize int
					if outSize, err = lz4.Compress(data, compressed); err != nil {
						server.BadRequest(w, r, err)
						return
					}
					compressed = compressed[:outSize]
					if n, err = w.Write(compressed); err != nil {
						server.BadRequest(w, r, err)
						return
					}
					if n != outSize {
						errmsg := fmt.Sprintf("Only able to write %d of %d lz4 compressed bytes\n", n, outSize)
						dvid.Errorf(errmsg)
						server.BadRequest(w, r, errmsg)
						return
					}
				case "gzip":
					gw := gzip.NewWriter(w)
					if _, err = gw.Write(data); err != nil {
						server.BadRequest(w, r, err)
						return
					}
					if err = gw.Close(); err != nil {
						server.BadRequest(w, r, err)
						return
					}
				default:
					server.BadRequest(w, r, "unknown compression type %q", compression)
					return
				}
			} else {
				if isotropic {
					server.BadRequest(w, r, "can only POST 'raw' not 'isotropic' images")
					return
				}
				// Make sure vox is block-aligned
				if !dvid.BlockAligned(subvol, d.BlockSize()) {
					server.BadRequest(w, r, "cannot store labels in non-block aligned geometry %s -> %s", subvol.StartPoint(), subvol.EndPoint())
					return
				}

				var data []byte
				switch compression {
				case "":
					tlog := dvid.NewTimeLog()
					data, err = ioutil.ReadAll(r.Body)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
					tlog.Debugf("read 3d uncompressed POST")
				case "lz4":
					tlog := dvid.NewTimeLog()
					data, err = ioutil.ReadAll(r.Body)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
					if len(data) == 0 {
						server.BadRequest(w, r, "received 0 LZ4 compressed bytes")
						return
					}
					tlog.Debugf("read 3d lz4 POST")
					tlog = dvid.NewTimeLog()
					uncompressed := make([]byte, subvol.NumVoxels()*8)
					err = lz4.Uncompress(data, uncompressed)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
					data = uncompressed
					tlog.Debugf("uncompressed 3d lz4 POST")
				case "gzip":
					tlog := dvid.NewTimeLog()
					gr, err := gzip.NewReader(r.Body)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
					data, err = ioutil.ReadAll(gr)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
					if err = gr.Close(); err != nil {
						server.BadRequest(w, r, err)
						return
					}
					tlog.Debugf("read and uncompress 3d gzip POST")
				default:
					server.BadRequest(w, r, "unknown compression type %q", compression)
					return
				}
				lbl, err := d.NewLabels(subvol, data)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				if roiptr != nil {
					roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), lbl)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
				}
				if err = d.PutVoxels(ctx.VersionID(), lbl.Voxels, roiptr); err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			timedLog.Infof("HTTP %s: %s (%s)", r.Method, subvol, r.URL)
		default:
			server.BadRequest(w, r, "DVID currently supports shapes of only 2 and 3 dimensions")
			return
		}

	default:
		server.BadRequest(w, r, "Unrecognized API call %q for labelblk data %q.  See API help.",
			parts[3], d.DataName())
	}
}
예제 #3
0
파일: imageblk.go 프로젝트: hanslovsky/dvid
// ServeHTTP handles all incoming HTTP requests for this data.
func (d *Data) ServeHTTP(uuid dvid.UUID, ctx *datastore.VersionedCtx, w http.ResponseWriter, r *http.Request) {
	timedLog := dvid.NewTimeLog()

	// Get the action (GET, POST)
	action := strings.ToLower(r.Method)
	switch action {
	case "get":
	case "post":
	default:
		server.BadRequest(w, r, "Can only handle GET or POST HTTP verbs")
		return
	}

	// Break URL request into arguments
	url := r.URL.Path[len(server.WebAPIPath):]
	parts := strings.Split(url, "/")
	if len(parts[len(parts)-1]) == 0 {
		parts = parts[:len(parts)-1]
	}

	// Get query strings and possible roi
	var roiptr *ROI
	queryValues := r.URL.Query()
	roiname := dvid.InstanceName(queryValues.Get("roi"))
	if len(roiname) != 0 {
		roiptr = new(ROI)
		attenuationStr := queryValues.Get("attenuation")
		if len(attenuationStr) != 0 {
			attenuation, err := strconv.Atoi(attenuationStr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if attenuation < 1 || attenuation > 7 {
				server.BadRequest(w, r, "Attenuation should be from 1 to 7 (divides by 2^n)")
				return
			}
			roiptr.attenuation = uint8(attenuation)
		}
	}

	// Handle POST on data -> setting of configuration
	if len(parts) == 3 && action == "put" {
		fmt.Printf("Setting configuration of data '%s'\n", d.DataName())
		config, err := server.DecodeJSON(r)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.ModifyConfig(config); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := datastore.SaveDataByUUID(uuid, d); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		fmt.Fprintf(w, "Changed '%s' based on received configuration:\n%s\n", d.DataName(), config)
		return
	}

	if len(parts) < 4 {
		server.BadRequest(w, r, "Incomplete API request")
		return
	}

	// Process help and info.
	switch parts[3] {
	case "help":
		w.Header().Set("Content-Type", "text/plain")
		fmt.Fprintln(w, d.Help())
		return

	case "metadata":
		jsonStr, err := d.NdDataMetadata()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/vnd.dvid-nd-data+json")
		fmt.Fprintln(w, jsonStr)
		return

	case "info":
		jsonBytes, err := d.MarshalJSON()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, string(jsonBytes))
		return

	case "rawkey":
		// GET <api URL>/node/<UUID>/<data name>/rawkey?x=<block x>&y=<block y>&z=<block z>
		if len(parts) != 4 {
			server.BadRequest(w, r, "rawkey endpoint should be followed by query strings (x, y, and z) giving block coord")
			return
		}

	case "blocks":
		// GET  <api URL>/node/<UUID>/<data name>/blocks/<block coord>/<spanX>
		// POST <api URL>/node/<UUID>/<data name>/blocks/<block coord>/<spanX>
		if len(parts) < 6 {
			server.BadRequest(w, r, "%q must be followed by block-coord/span-x", parts[3])
			return
		}
		blockCoord, err := dvid.StringToChunkPoint3d(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		span, err := strconv.Atoi(parts[5])
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if action == "get" {
			data, err := d.GetBlocks(ctx.VersionID(), blockCoord, int32(span))
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			w.Header().Set("Content-type", "application/octet-stream")
			_, err = w.Write(data)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
		} else {
			if err := d.PutBlocks(ctx.VersionID(), blockCoord, span, r.Body); err != nil {
				server.BadRequest(w, r, err)
				return
			}
		}
		timedLog.Infof("HTTP %s: Blocks (%s)", r.Method, r.URL)

	case "arb":
		// GET  <api URL>/node/<UUID>/<data name>/arb/<top left>/<top right>/<bottom left>/<res>[/<format>]
		if len(parts) < 8 {
			server.BadRequest(w, r, "%q must be followed by top-left/top-right/bottom-left/res", parts[3])
			return
		}
		queryStrings := r.URL.Query()
		throttle := queryStrings.Get("throttle")
		if throttle == "true" || throttle == "on" {
			select {
			case <-server.Throttle:
				// Proceed with operation, returning throttle token to server at end.
				defer func() {
					server.Throttle <- 1
				}()
			default:
				throttleMsg := fmt.Sprintf("Server already running maximum of %d throttled operations",
					server.MaxThrottledOps)
				http.Error(w, throttleMsg, http.StatusServiceUnavailable)
				return
			}
		}
		img, err := d.GetArbitraryImage(ctx, parts[4], parts[5], parts[6], parts[7])
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		var formatStr string
		if len(parts) >= 9 {
			formatStr = parts[8]
		}
		err = dvid.WriteImageHttp(w, img.Get(), formatStr)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: Arbitrary image (%s)", r.Method, r.URL)

	case "raw", "isotropic":
		// GET  <api URL>/node/<UUID>/<data name>/isotropic/<dims>/<size>/<offset>[/<format>]
		if len(parts) < 7 {
			server.BadRequest(w, r, "%q must be followed by shape/size/offset", parts[3])
			return
		}
		var isotropic bool = (parts[3] == "isotropic")
		shapeStr, sizeStr, offsetStr := parts[4], parts[5], parts[6]
		planeStr := dvid.DataShapeString(shapeStr)
		plane, err := planeStr.DataShape()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		switch plane.ShapeDimensions() {
		case 2:
			slice, err := dvid.NewSliceFromStrings(planeStr, offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if action != "get" {
				server.BadRequest(w, r, "DVID does not permit 2d mutations, only 3d block-aligned stores")
				return
			}
			rawSlice, err := dvid.Isotropy2D(d.Properties.VoxelSize, slice, isotropic)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			vox, err := d.NewVoxels(rawSlice, nil)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if roiptr != nil {
				roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), vox)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			img, err := d.GetImage(ctx.VersionID(), vox, roiptr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if isotropic {
				dstW := int(slice.Size().Value(0))
				dstH := int(slice.Size().Value(1))
				img, err = img.ScaleImage(dstW, dstH)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			var formatStr string
			if len(parts) >= 8 {
				formatStr = parts[7]
			}
			err = dvid.WriteImageHttp(w, img.Get(), formatStr)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			timedLog.Infof("HTTP %s: %s (%s)", r.Method, plane, r.URL)
		case 3:
			queryStrings := r.URL.Query()
			if queryStrings.Get("throttle") == "on" {
				select {
				case <-server.Throttle:
					// Proceed with operation, returning throttle token to server at end.
					defer func() {
						server.Throttle <- 1
					}()
				default:
					throttleMsg := fmt.Sprintf("Server already running maximum of %d throttled operations",
						server.MaxThrottledOps)
					http.Error(w, throttleMsg, http.StatusServiceUnavailable)
					return
				}
			}
			subvol, err := dvid.NewSubvolumeFromStrings(offsetStr, sizeStr, "_")
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			if action == "get" {
				vox, err := d.NewVoxels(subvol, nil)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				if roiptr != nil {
					roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), vox)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
				}
				data, err := d.GetVolume(ctx.VersionID(), vox, roiptr)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				w.Header().Set("Content-type", "application/octet-stream")
				_, err = w.Write(data)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
			} else {
				if isotropic {
					err := fmt.Errorf("can only PUT 'raw' not 'isotropic' images")
					server.BadRequest(w, r, err)
					return
				}
				// Make sure vox is block-aligned
				if !dvid.BlockAligned(subvol, d.BlockSize()) {
					server.BadRequest(w, r, "cannot store voxels in non-block aligned geometry %s -> %s", subvol.StartPoint(), subvol.EndPoint())
					return
				}

				data, err := ioutil.ReadAll(r.Body)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				vox, err := d.NewVoxels(subvol, data)
				if err != nil {
					server.BadRequest(w, r, err)
					return
				}
				if roiptr != nil {
					roiptr.Iter, err = roi.NewIterator(roiname, ctx.VersionID(), vox)
					if err != nil {
						server.BadRequest(w, r, err)
						return
					}
				}
				if err = d.PutVoxels(ctx.VersionID(), vox, roiptr); err != nil {
					server.BadRequest(w, r, err)
					return
				}
			}
			timedLog.Infof("HTTP %s: %s (%s)", r.Method, subvol, r.URL)
		default:
			server.BadRequest(w, r, "DVID currently supports shapes of only 2 and 3 dimensions")
		}
	default:
		server.BadRequest(w, r, "Unrecognized API call for voxels %q.  See API help.", d.DataName())
	}
}
예제 #4
0
// ServeHTTP handles all incoming HTTP requests for this data.
func (d *Data) ServeHTTP(uuid dvid.UUID, ctx *datastore.VersionedCtx, w http.ResponseWriter, r *http.Request) {
	timedLog := dvid.NewTimeLog()

	// Get the action (GET, POST)
	action := strings.ToLower(r.Method)

	// Break URL request into arguments
	url := r.URL.Path[len(server.WebAPIPath):]
	parts := strings.Split(url, "/")
	if len(parts[len(parts)-1]) == 0 {
		parts = parts[:len(parts)-1]
	}

	// Handle POST on data -> setting of configuration
	if len(parts) == 3 && action == "put" {
		config, err := server.DecodeJSON(r)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.ModifyConfig(config); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := datastore.SaveDataByUUID(uuid, d); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		fmt.Fprintf(w, "Changed '%s' based on received configuration:\n%s\n", d.DataName(), config)
		return
	}

	if len(parts) < 4 {
		server.BadRequest(w, r, "Incomplete API request")
		return
	}

	// Process help and info.
	switch parts[3] {
	case "help":
		w.Header().Set("Content-Type", "text/plain")
		fmt.Fprintln(w, dtype.Help())

	case "info":
		jsonBytes, err := d.MarshalJSON()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, string(jsonBytes))

	case "sync":
		if action != "post" {
			server.BadRequest(w, r, "Only POST allowed to sync endpoint")
			return
		}
		replace := r.URL.Query().Get("replace") == "true"
		if err := datastore.SetSyncByJSON(d, uuid, replace, r.Body); err != nil {
			server.BadRequest(w, r, err)
			return
		}

	case "count":
		if action != "get" {
			server.BadRequest(w, r, "Only GET action is available on 'count' endpoint.")
			return
		}
		if len(parts) < 6 {
			server.BadRequest(w, r, "Must include label and element type after 'count' endpoint.")
			return
		}
		label, err := strconv.ParseUint(parts[4], 10, 64)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		i := StringToIndexType(parts[5])
		if i == UnknownIndex {
			server.BadRequest(w, r, fmt.Errorf("unknown index type specified (%q)", parts[5]))
			return
		}
		count, err := d.GetCountElementType(ctx, label, i)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		jsonStr := fmt.Sprintf(`{"Label":%d,%q:%d}`, label, i, count)
		if _, err := io.WriteString(w, jsonStr); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: get count for label %d, index type %s: %s", r.Method, label, i, r.URL)

	case "top":
		if action != "get" {
			server.BadRequest(w, r, "Only GET action is available on 'top' endpoint.")
			return
		}
		if len(parts) < 6 {
			server.BadRequest(w, r, "Must include N and element type after 'top' endpoint.")
			return
		}
		n, err := strconv.ParseUint(parts[4], 10, 32)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		i := StringToIndexType(parts[5])
		if i == UnknownIndex {
			server.BadRequest(w, r, fmt.Errorf("unknown index type specified (%q)", parts[5]))
			return
		}
		labelSizes, err := d.GetTopElementType(ctx, int(n), i)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		jsonBytes, err := json.Marshal(labelSizes)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if _, err := w.Write(jsonBytes); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: get top %d labels for index type %s: %s", r.Method, n, i, r.URL)

	case "threshold":
		if action != "get" {
			server.BadRequest(w, r, "Only GET action is available on 'threshold' endpoint.")
			return
		}
		if len(parts) < 6 {
			server.BadRequest(w, r, "Must include threshold # and element type after 'threshold' endpoint.")
			return
		}
		t, err := strconv.ParseUint(parts[4], 10, 32)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		minSize := uint32(t)
		i := StringToIndexType(parts[5])
		if i == UnknownIndex {
			server.BadRequest(w, r, fmt.Errorf("unknown index type specified (%q)", parts[5]))
			return
		}

		queryStrings := r.URL.Query()
		var num, offset int
		offsetStr := queryStrings.Get("offset")
		if offsetStr != "" {
			offset, err = strconv.Atoi(offsetStr)
			if err != nil {
				server.BadRequest(w, r, fmt.Errorf("bad offset specified in query string (%q)", offsetStr))
				return
			}
		}
		numStr := queryStrings.Get("n")
		if numStr != "" {
			num, err = strconv.Atoi(numStr)
			if err != nil {
				server.BadRequest(w, r, fmt.Errorf("bad num specified in query string (%q)", numStr))
				return
			}
		}

		labels, err := d.GetLabelsByThreshold(ctx, i, minSize, offset, num)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/json")
		jsonBytes, err := json.Marshal(labels)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if _, err := w.Write(jsonBytes); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: get %d labels for index type %s with threshold %d: %s", r.Method, num, i, t, r.URL)

	default:
		server.BadAPIRequest(w, r, d)
	}
}
예제 #5
0
파일: labelvol.go 프로젝트: jwohlwend/dvid
// ServeHTTP handles all incoming HTTP requests for this data.
func (d *Data) ServeHTTP(uuid dvid.UUID, ctx *datastore.VersionedCtx, w http.ResponseWriter, r *http.Request) {
	timedLog := dvid.NewTimeLog()
	versionID := ctx.VersionID()

	// Get the action (GET, POST)
	action := strings.ToLower(r.Method)

	// Break URL request into arguments
	url := r.URL.Path[len(server.WebAPIPath):]
	parts := strings.Split(url, "/")
	if len(parts[len(parts)-1]) == 0 {
		parts = parts[:len(parts)-1]
	}

	// Handle POST on data -> setting of configuration
	if len(parts) == 3 && action == "put" {
		config, err := server.DecodeJSON(r)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.ModifyConfig(config); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := datastore.SaveDataByUUID(uuid, d); err != nil {
			server.BadRequest(w, r, err)
			return
		}
		fmt.Fprintf(w, "Changed '%s' based on received configuration:\n%s\n", d.DataName(), config)
		return
	}

	if len(parts) < 4 {
		server.BadRequest(w, r, "Incomplete API request")
		return
	}

	// Process help and info.
	switch parts[3] {
	case "help":
		w.Header().Set("Content-Type", "text/plain")
		fmt.Fprintln(w, dtype.Help())

	case "info":
		jsonBytes, err := d.MarshalJSON()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, string(jsonBytes))

	case "sparsevol":
		// GET <api URL>/node/<UUID>/<data name>/sparsevol/<label>
		// POST <api URL>/node/<UUID>/<data name>/sparsevol/<label>
		if len(parts) < 5 {
			server.BadRequest(w, r, "ERROR: DVID requires label ID to follow 'sparsevol' command")
			return
		}
		label, err := strconv.ParseUint(parts[4], 10, 64)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		switch action {
		case "get":
			queryValues := r.URL.Query()
			var b Bounds
			b.VoxelBounds, err = dvid.BoundsFromQueryString(r)
			if err != nil {
				server.BadRequest(w, r, "Error parsing bounds from query string: %v\n", err)
				return
			}
			b.BlockBounds = b.VoxelBounds.Divide(d.BlockSize)
			b.Exact = queryValues.Get("exact") == "true"
			data, err := GetSparseVol(ctx, label, b)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
			w.Header().Set("Content-type", "application/octet-stream")
			_, err = w.Write(data)
			if err != nil {
				server.BadRequest(w, r, err)
				return
			}
		case "post":
			server.BadRequest(w, r, "POST of sparsevol not currently implemented\n")
			return
			// if err := d.PutSparseVol(versionID, label, r.Body); err != nil {
			// 	server.BadRequest(w, r, err)
			// 	return
			// }
		default:
			server.BadRequest(w, r, "Unable to handle HTTP action %s on sparsevol endpoint", action)
			return
		}
		timedLog.Infof("HTTP %s: sparsevol on label %d (%s)", r.Method, label, r.URL)

	case "sparsevol-by-point":
		// GET <api URL>/node/<UUID>/<data name>/sparsevol-by-point/<coord>
		if len(parts) < 5 {
			server.BadRequest(w, r, "ERROR: DVID requires coord to follow 'sparsevol-by-point' command")
			return
		}
		coord, err := dvid.StringToPoint(parts[4], "_")
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		source, err := d.GetSyncedLabelblk(versionID)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		label, err := source.GetLabelAtPoint(ctx.VersionID(), coord)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		data, err := GetSparseVol(ctx, label, Bounds{})
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/octet-stream")
		_, err = w.Write(data)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: sparsevol-by-point at %s (%s)", r.Method, coord, r.URL)

	case "sparsevol-coarse":
		// GET <api URL>/node/<UUID>/<data name>/sparsevol-coarse/<label>
		if len(parts) < 5 {
			server.BadRequest(w, r, "ERROR: DVID requires label ID to follow 'sparsevol-coarse' command")
			return
		}
		label, err := strconv.ParseUint(parts[4], 10, 64)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		data, err := GetSparseCoarseVol(ctx, label)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		w.Header().Set("Content-type", "application/octet-stream")
		_, err = w.Write(data)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		timedLog.Infof("HTTP %s: sparsevol-coarse on label %d (%s)", r.Method, label, r.URL)

	case "maxlabel":
		// GET <api URL>/node/<UUID>/<data name>/maxlabel
		w.Header().Set("Content-Type", "application/json")
		switch action {
		case "get":
			maxlabel, ok := d.MaxLabel[versionID]
			if !ok {
				server.BadRequest(w, r, "No maximum label found for %s version %d\n", d.DataName(), versionID)
				return
			}
			fmt.Fprintf(w, "{%q: %d}", "maxlabel", maxlabel)
		default:
			server.BadRequest(w, r, "Unknown action %q requested: %s\n", action, r.URL)
			return
		}
		timedLog.Infof("HTTP maxlabel request (%s)", r.URL)

	case "nextlabel":
		// GET <api URL>/node/<UUID>/<data name>/nextlabel
		// POST <api URL>/node/<UUID>/<data name>/nextlabel
		w.Header().Set("Content-Type", "application/json")
		switch action {
		case "get":
			fmt.Fprintf(w, "{%q: %d}", "nextlabel", d.MaxRepoLabel+1)
		case "post":
			server.BadRequest(w, r, "POST on maxlabel is not supported yet.\n")
			return
		default:
			server.BadRequest(w, r, "Unknown action %q requested: %s\n", action, r.URL)
			return
		}
		timedLog.Infof("HTTP maxlabel request (%s)", r.URL)

	case "split":
		// POST <api URL>/node/<UUID>/<data name>/split/<label>
		if action != "post" {
			server.BadRequest(w, r, "Split requests must be POST actions.")
			return
		}
		if len(parts) < 5 {
			server.BadRequest(w, r, "ERROR: DVID requires label ID to follow 'split' command")
			return
		}
		fromLabel, err := strconv.ParseUint(parts[4], 10, 64)
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		toLabel, err := d.SplitLabels(ctx.VersionID(), fromLabel, r.Body)
		if err != nil {
			server.BadRequest(w, r, fmt.Sprintf("Error on split: %v", err))
			return
		}
		w.Header().Set("Content-Type", "application/json")
		fmt.Fprintf(w, "{%q: %d}", "label", toLabel)
		timedLog.Infof("HTTP split request (%s)", r.URL)

	case "merge":
		// POST <api URL>/node/<UUID>/<data name>/merge
		if action != "post" {
			server.BadRequest(w, r, "Merge requests must be POST actions.")
			return
		}
		data, err := ioutil.ReadAll(r.Body)
		if err != nil {
			server.BadRequest(w, r, "Bad POSTed data for merge.  Should be JSON.")
			return
		}
		var tuple labels.MergeTuple
		if err := json.Unmarshal(data, &tuple); err != nil {
			server.BadRequest(w, r, fmt.Sprintf("Bad merge op JSON: %v", err))
			return
		}
		mergeOp, err := tuple.Op()
		if err != nil {
			server.BadRequest(w, r, err)
			return
		}
		if err := d.MergeLabels(ctx.VersionID(), mergeOp); err != nil {
			server.BadRequest(w, r, fmt.Sprintf("Error on merge: %v", err))
			return
		}
		timedLog.Infof("HTTP merge request (%s)", r.URL)

	default:
		server.BadRequest(w, r, "Unrecognized API call %q for labelvol data %q.  See API help.",
			parts[3], d.DataName())
	}
}