Golang Cid.String方法代码示例

// Write one edge
func (rw *RefWriter) WriteEdge(from, to *cid.Cid, linkname string) error {
	if rw.Ctx != nil {
		select {
		case <-rw.Ctx.Done(): // just in case.
			return rw.Ctx.Err()
		default:
		}
	}

	var s string
	switch {
	case rw.PrintFmt != "":
		s = rw.PrintFmt
		s = strings.Replace(s, "<src>", from.String(), -1)
		s = strings.Replace(s, "<dst>", to.String(), -1)
		s = strings.Replace(s, "<linkname>", linkname, -1)
	default:
		s += to.String()
	}

	rw.out <- &RefWrapper{Ref: s}
	return nil
}

// FromCid safely converts a cid.Cid type to a Path type
func FromCid(c *cid.Cid) Path {
	return Path("/ipfs/" + c.String())
}

func (i *gatewayHandler) putHandler(w http.ResponseWriter, r *http.Request) {
	// TODO(cryptix): move me to ServeHTTP and pass into all handlers
	ctx, cancel := context.WithCancel(i.node.Context())
	defer cancel()

	rootPath, err := path.ParsePath(r.URL.Path)
	if err != nil {
		webError(w, "putHandler: IPFS path not valid", err, http.StatusBadRequest)
		return
	}

	rsegs := rootPath.Segments()
	if rsegs[0] == ipnsPathPrefix {
		webError(w, "putHandler: updating named entries not supported", errors.New("WritableGateway: ipns put not supported"), http.StatusBadRequest)
		return
	}

	var newnode node.Node
	if rsegs[len(rsegs)-1] == "QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn" {
		newnode = ft.EmptyDirNode()
	} else {
		putNode, err := i.newDagFromReader(r.Body)
		if err != nil {
			webError(w, "putHandler: Could not create DAG from request", err, http.StatusInternalServerError)
			return
		}
		newnode = putNode
	}

	var newPath string
	if len(rsegs) > 1 {
		newPath = path.Join(rsegs[2:])
	}

	var newcid *cid.Cid
	rnode, err := core.Resolve(ctx, i.node.Namesys, i.node.Resolver, rootPath)
	switch ev := err.(type) {
	case path.ErrNoLink:
		// ev.Node < node where resolve failed
		// ev.Name < new link
		// but we need to patch from the root
		c, err := cid.Decode(rsegs[1])
		if err != nil {
			webError(w, "putHandler: bad input path", err, http.StatusBadRequest)
			return
		}

		rnode, err := i.node.DAG.Get(ctx, c)
		if err != nil {
			webError(w, "putHandler: Could not create DAG from request", err, http.StatusInternalServerError)
			return
		}

		pbnd, ok := rnode.(*dag.ProtoNode)
		if !ok {
			webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
			return
		}

		e := dagutils.NewDagEditor(pbnd, i.node.DAG)
		err = e.InsertNodeAtPath(ctx, newPath, newnode, ft.EmptyDirNode)
		if err != nil {
			webError(w, "putHandler: InsertNodeAtPath failed", err, http.StatusInternalServerError)
			return
		}

		nnode, err := e.Finalize(i.node.DAG)
		if err != nil {
			webError(w, "putHandler: could not get node", err, http.StatusInternalServerError)
			return
		}

		newcid = nnode.Cid()

	case nil:
		pbnd, ok := rnode.(*dag.ProtoNode)
		if !ok {
			webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
			return
		}

		pbnewnode, ok := newnode.(*dag.ProtoNode)
		if !ok {
			webError(w, "Cannot read non protobuf nodes through gateway", dag.ErrNotProtobuf, http.StatusBadRequest)
			return
		}

		// object set-data case
		pbnd.SetData(pbnewnode.Data())

		newcid, err = i.node.DAG.Add(pbnd)
		if err != nil {
			nnk := newnode.Cid()
			rk := pbnd.Cid()
			webError(w, fmt.Sprintf("putHandler: Could not add newnode(%q) to root(%q)", nnk.String(), rk.String()), err, http.StatusInternalServerError)
			return
		}
	default:
		log.Warningf("putHandler: unhandled resolve error %T", ev)
		webError(w, "could not resolve root DAG", ev, http.StatusInternalServerError)
//.........这里部分代码省略.........