Golang blob.ParseOrZero函數代碼示例

// fromHTTP panics with an httputil value on failure
func (r *WithAttrRequest) fromHTTP(req *http.Request) {
	r.Signer = blob.ParseOrZero(req.FormValue("signer"))
	r.Value = req.FormValue("value")
	fuzzy := req.FormValue("fuzzy") // exact match if empty
	fuzzyMatch := false
	if fuzzy != "" {
		lowered := strings.ToLower(fuzzy)
		if lowered == "true" || lowered == "t" {
			fuzzyMatch = true
		}
	}
	r.Attr = req.FormValue("attr") // all attributes if empty
	if r.Attr == "" {              // and force fuzzy in that case.
		fuzzyMatch = true
	}
	r.Fuzzy = fuzzyMatch
	r.ThumbnailSize = thumbnailSize(req)
	max := req.FormValue("max")
	if max != "" {
		maxR, err := strconv.Atoi(max)
		if err != nil {
			panic(httputil.InvalidParameterError("max"))
		}
		r.N = maxR
	}
	r.N = r.n()
}

func (sto *appengineStorage) EnumerateBlobs(dest chan<- blob.SizedRef, after string, limit int, wait time.Duration) error {
	defer close(dest)

	ctx := sto.ctx
	if ctx == nil {
		loan := ctxPool.Get()
		defer loan.Return()
		ctx = loan
	}

	prefix := sto.namespace + "|"
	keyBegin := datastore.NewKey(ctx, memKind, prefix+after, 0, nil)
	keyEnd := datastore.NewKey(ctx, memKind, sto.namespace+"~", 0, nil)

	q := datastore.NewQuery(memKind).Limit(int(limit)).Filter("__key__>", keyBegin).Filter("__key__<", keyEnd)
	it := q.Run(ctx)
	var row memEnt
	for {
		key, err := it.Next(&row)
		if err == datastore.Done {
			break
		}
		if err != nil {
			return err
		}
		dest <- blob.SizedRef{blob.ParseOrZero(key.StringID()[len(prefix):]), row.Size}
	}
	return nil
}

func (sto *appengineStorage) EnumerateBlobs(ctx context.Context, dest chan<- blob.SizedRef, after string, limit int) error {
	defer close(dest)

	loan := ctxPool.Get()
	defer loan.Return()
	actx := loan

	prefix := sto.namespace + "|"
	keyBegin := datastore.NewKey(actx, memKind, prefix+after, 0, nil)
	keyEnd := datastore.NewKey(actx, memKind, sto.namespace+"~", 0, nil)

	q := datastore.NewQuery(memKind).Limit(int(limit)).Filter("__key__>", keyBegin).Filter("__key__<", keyEnd)
	it := q.Run(actx)
	var row memEnt
	for {
		key, err := it.Next(&row)
		if err == datastore.Done {
			break
		}
		if err != nil {
			return err
		}
		select {
		case dest <- blob.SizedRef{blob.ParseOrZero(key.StringID()[len(prefix):]), uint32(row.Size)}:
		case <-ctx.Done():
			return ctx.Err()
		}
	}
	return nil
}

func blobFromURLPath(path string) blob.Ref {
	matches := kGetPattern.FindStringSubmatch(path)
	if len(matches) != 3 {
		return blob.Ref{}
	}
	return blob.ParseOrZero(strings.TrimPrefix(matches[0], "/camli/"))
}

func NewFlatStatCache(gen string) *FlatStatCache {
	filename := filepath.Join(osutil.CacheDir(), "camput.statcache."+escapeGen(gen))
	fc := &FlatStatCache{
		filename: filename,
		m:        make(map[string]fileInfoPutRes),
	}

	f, err := os.Open(filename)
	if os.IsNotExist(err) {
		return fc
	}
	if err != nil {
		log.Fatalf("opening camput stat cache: %v", filename, err)
	}
	defer f.Close()
	br := bufio.NewReader(f)
	for {
		ln, err := br.ReadString('\n')
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Printf("Warning: (ignoring) reading stat cache: %v", err)
			break
		}
		ln = strings.TrimSpace(ln)
		f := strings.Split(ln, "\t")
		if len(f) < 3 {
			continue
		}
		filename, fp, putres := f[0], statFingerprint(f[1]), f[2]
		f = strings.Split(putres, "/")
		if len(f) != 2 {
			continue
		}
		blobrefStr := f[0]
		blobSize, err := strconv.ParseInt(f[1], 10, 64)
		if err != nil {
			continue
		}

		fc.m[filename] = fileInfoPutRes{
			Fingerprint: fp,
			Result: client.PutResult{
				BlobRef: blob.ParseOrZero(blobrefStr),
				Size:    blobSize,
				Skipped: true, // is this used?
			},
		}
	}
	vlog.Printf("Flatcache read %d entries from %s", len(fc.m), filename)
	return fc
}

// processEncryptedMetaBlob decrypts dat (the data for the br meta blob) and parses
// its meta lines, updating the index.
//
// processEncryptedMetaBlob is not thread-safe.
func (s *storage) processEncryptedMetaBlob(br blob.Ref, dat []byte) error {
	mi := &metaBlobInfo{
		br: br,
		n:  len(dat),
	}
	log.Printf("processing meta blob %v: %d bytes", br, len(dat))
	ivSize := s.block.BlockSize()
	if len(dat) < ivSize+sha1.Size {
		return errors.New("data size is smaller than IV + SHA-1")
	}
	var (
		iv       = dat[:ivSize]
		wantHash = dat[ivSize : ivSize+sha1.Size]
		enc      = dat[ivSize+sha1.Size:]
	)
	plain := bytes.NewBuffer(make([]byte, 0, len(dat)))
	io.Copy(plain, cipher.StreamReader{
		S: cipher.NewCTR(s.block, iv),
		R: bytes.NewReader(enc),
	})
	s1 := sha1.New()
	s1.Write(plain.Bytes())
	if !bytes.Equal(wantHash, s1.Sum(nil)) {
		return errors.New("hash of encrypted data doesn't match")
	}
	sc := bufio.NewScanner(plain)
	if !sc.Scan() {
		return errors.New("No first line")
	}
	if sc.Text() != "#camlistore/encmeta=1" {
		line := sc.Text()
		if len(line) > 80 {
			line = line[:80]
		}
		return fmt.Errorf("unsupported first line %q", line)
	}
	for sc.Scan() {
		line := sc.Text()
		slash := strings.Index(line, "/")
		if slash < 0 {
			return errors.New("no slash in metaline")
		}
		plainBR, meta := line[:slash], line[slash+1:]
		log.Printf("Adding meta: %q = %q", plainBR, meta)
		mi.plains = append(mi.plains, blob.ParseOrZero(plainBR))
		if err := s.index.Set(plainBR, meta); err != nil {
			return err
		}
	}
	return sc.Err()
}

func PathsOfSignerTarget(t *testing.T, initIdx func() *index.Index) {
	id := NewIndexDeps(initIdx())
	id.Fataler = t
	pn := id.NewPermanode()
	t.Logf("uploaded permanode %q", pn)

	claim1 := id.SetAttribute(pn, "camliPath:somedir", "targ-123")
	claim2 := id.SetAttribute(pn, "camliPath:with|pipe", "targ-124")
	t.Logf("made path claims %q and %q", claim1, claim2)

	id.dumpIndex(t)

	type test struct {
		blobref string
		want    int
	}
	tests := []test{
		{"targ-123", 1},
		{"targ-124", 1},
		{"targ-125", 0},
	}
	for _, tt := range tests {
		signer := id.SignerBlobRef
		paths, err := id.Index.PathsOfSignerTarget(signer, blob.ParseOrZero(tt.blobref))
		if err != nil {
			t.Fatalf("PathsOfSignerTarget(%q): %v", tt.blobref, err)
		}
		if len(paths) != tt.want {
			t.Fatalf("PathsOfSignerTarget(%q) got %d results; want %d",
				tt.blobref, len(paths), tt.want)
		}
		if tt.blobref == "targ-123" {
			p := paths[0]
			want := fmt.Sprintf(
				"Path{Claim: %s, 2011-11-28T01:32:37.000123456Z; Base: %s + Suffix \"somedir\" => Target targ-123}",
				claim1, pn)
			if g := p.String(); g != want {
				t.Errorf("claim wrong.\n got: %s\nwant: %s", g, want)
			}
		}
	}

	path, err := id.Index.PathLookup(id.SignerBlobRef, pn, "with|pipe", time.Now())
	if err != nil {
		t.Fatalf("PathLookup = %v", err)
	}
	if g, e := path.Target.String(), "targ-124"; g != e {
		t.Errorf("PathLookup = %q; want %q", g, e)
	}
}

// parent returns the base path and the blobRef of pr.subject's parent.
// It returns an error if pr.subject or pr.subjectBasePath were not set
// properly (with findSubject), or if the parent was not found.
func (pr *publishRequest) parent() (parentPath string, parentBlobRef blob.Ref, err error) {
	if !pr.subject.Valid() {
		return "", blob.Ref{}, errors.New("subject not set")
	}
	if pr.subjectBasePath == "" {
		return "", blob.Ref{}, errors.New("subjectBasePath not set")
	}
	// TODO(mpl): this fails when the parent is the root. fix it.
	hops := publishedPath(pr.subjectBasePath).splitHops()
	if len(hops) == 0 {
		return "", blob.Ref{}, errors.New("No subresource digest in subjectBasePath")
	}
	subjectDigest := hops[len(hops)-1]
	if subjectDigest != pr.subject.DigestPrefix(digestLen) {
		return "", blob.Ref{}, errors.New("subject digest not in subjectBasePath")
	}
	parentPath = strings.TrimSuffix(pr.subjectBasePath, "/"+digestPrefix+subjectDigest)

	if len(hops) == 1 {
		// the parent is the suffix, not one of the subresource hops
		for br, _ := range pr.inSubjectChain {
			if br != pr.subject.String() {
				parentBlobRef = blob.ParseOrZero(br)
				break
			}
		}
	} else {
		// nested collection(s)
		parentDigest := hops[len(hops)-2]
		for br, _ := range pr.inSubjectChain {
			bref, ok := blob.Parse(br)
			if !ok {
				return "", blob.Ref{}, fmt.Errorf("Could not parse %q as blobRef", br)
			}
			if bref.DigestPrefix(10) == parentDigest {
				parentBlobRef = bref
				break
			}
		}
	}
	if !parentBlobRef.Valid() {
		return "", blob.Ref{}, fmt.Errorf("No parent found for %v", pr.subjectBasePath)
	}
	return parentPath, parentBlobRef, nil
}

// NewFromShareRoot uses shareBlobURL to set up and return a client that
// will be used to fetch shared blobs.
func NewFromShareRoot(shareBlobURL string, opts ...ClientOption) (c *Client, target blob.Ref, err error) {
	var root string
	m := shareURLRx.FindStringSubmatch(shareBlobURL)
	if m == nil {
		return nil, blob.Ref{}, fmt.Errorf("Unkown share URL base")
	}
	c = New(m[1])
	c.discoOnce.Do(func() { /* nothing */
	})
	c.prefixOnce.Do(func() { /* nothing */
	})
	c.prefixv = m[1]
	c.isSharePrefix = true
	c.authMode = auth.None{}
	c.via = make(map[string]string)
	root = m[2]

	for _, v := range opts {
		v.modifyClient(c)
	}
	c.SetHTTPClient(&http.Client{Transport: c.TransportForConfig(nil)})

	req := c.newRequest("GET", shareBlobURL, nil)
	res, err := c.doReqGated(req)
	if err != nil {
		return nil, blob.Ref{}, fmt.Errorf("Error fetching %s: %v", shareBlobURL, err)
	}
	defer res.Body.Close()
	b, err := schema.BlobFromReader(blob.ParseOrZero(root), res.Body)
	if err != nil {
		return nil, blob.Ref{}, fmt.Errorf("Error parsing JSON from %s: %v", shareBlobURL, err)
	}
	if b.ShareAuthType() != schema.ShareHaveRef {
		return nil, blob.Ref{}, fmt.Errorf("Unknown share authType of %q", b.ShareAuthType())
	}
	target = b.ShareTarget()
	if !target.Valid() {
		return nil, blob.Ref{}, fmt.Errorf("No target.")
	}
	c.via[target.String()] = root
	return c, target, nil
}

func (c *Corpus) pnCamliContent(pn blob.Ref) (cc blob.Ref, t time.Time, ok bool) {
	// TODO(bradfitz): keep this property cached
	pm, ok := c.permanodes[pn]
	if !ok {
		return
	}
	for _, cl := range pm.Claims {
		if cl.Attr != "camliContent" {
			continue
		}
		// TODO: pass down the 'PermanodeConstraint.At' parameter, and then do: if cl.Date.After(at) { continue }
		switch cl.Type {
		case string(schema.DelAttributeClaim):
			cc = blob.Ref{}
			t = time.Time{}
		case string(schema.SetAttributeClaim):
			cc = blob.ParseOrZero(cl.Value)
			t = cl.Date
		}
	}
	return cc, t, cc.Valid()

}

// NewFromShareRoot uses shareBlobURL to set up and return a client that
// will be used to fetch shared blobs.
func NewFromShareRoot(shareBlobURL string, opts ...ClientOption) (c *Client, target blob.Ref, err error) {
	var root string
	m := shareURLRx.FindStringSubmatch(shareBlobURL)
	if m == nil {
		return nil, blob.Ref{}, fmt.Errorf("Unkown share URL base")
	}
	c = New(m[1], opts...)
	c.discoOnce.Do(noop)
	c.prefixOnce.Do(noop)
	c.prefixv = m[1]
	c.isSharePrefix = true
	c.authMode = auth.None{}
	c.via = make(map[string]string)
	root = m[2]

	req := c.newRequest("GET", shareBlobURL, nil)
	res, err := c.expect2XX(req)
	if err != nil {
		return nil, blob.Ref{}, fmt.Errorf("error fetching %s: %v", shareBlobURL, err)
	}
	defer res.Body.Close()
	var buf bytes.Buffer
	b, err := schema.BlobFromReader(blob.ParseOrZero(root), io.TeeReader(res.Body, &buf))
	if err != nil {
		return nil, blob.Ref{}, fmt.Errorf("error parsing JSON from %s: %v , with response: %q", shareBlobURL, err, buf.Bytes())
	}
	if b.ShareAuthType() != schema.ShareHaveRef {
		return nil, blob.Ref{}, fmt.Errorf("unknown share authType of %q", b.ShareAuthType())
	}
	target = b.ShareTarget()
	if !target.Valid() {
		return nil, blob.Ref{}, fmt.Errorf("no target.")
	}
	c.via[target.String()] = root
	return c, target, nil
}

//.........這裏部分代碼省略.........
	// GetDirMembers
	{
		ch := make(chan blob.Ref, 10) // expect 2 results
		err := id.Index.GetDirMembers(imagesDirRef, ch, 50)
		if err != nil {
			t.Fatalf("GetDirMembers = %v", err)
		}
		got := []blob.Ref{}
		for r := range ch {
			got = append(got, r)
		}
		want := []blob.Ref{jpegFileRef, exifFileRef}
		if len(got) != len(want) {
			t.Errorf("GetDirMembers results differ.\n got: %v\nwant: %v",
				got, want)
		}
		for _, w := range want {
			found := false
			for _, g := range got {
				if w.String() == g.String() {
					found = true
					break
				}
			}
			if !found {
				t.Errorf("GetDirMembers: %v was not found.", w)
			}
		}
	}

	// GetBlobMIMEType
	{
		mime, size, err := id.Index.GetBlobMIMEType(pn)
		if err != nil {
			t.Errorf("GetBlobMIMEType(%q) = %v", pn, err)
		} else {
			if e := "application/json; camliType=permanode"; mime != e {
				t.Errorf("GetBlobMIMEType(%q) mime = %q, want %q", pn, mime, e)
			}
			if size == 0 {
				t.Errorf("GetBlobMIMEType(%q) size is zero", pn)
			}
		}
		_, _, err = id.Index.GetBlobMIMEType(blob.ParseOrZero("abc-123"))
		if err != os.ErrNotExist {
			t.Errorf("GetBlobMIMEType(dummy blobref) = %v; want os.ErrNotExist", err)
		}
	}

	// GetOwnerClaims
	{
		claims, err := id.Index.GetOwnerClaims(pn, id.SignerBlobRef)
		if err != nil {
			t.Errorf("GetOwnerClaims = %v", err)
		} else {
			want := search.ClaimList([]*search.Claim{
				&search.Claim{
					BlobRef:   br1,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      br1Time.UTC(),
					Type:      "set-attribute",
					Attr:      "tag",
					Value:     "foo1",
				},
				&search.Claim{
					BlobRef:   br2,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      br2Time.UTC(),
					Type:      "set-attribute",
					Attr:      "tag",
					Value:     "foo2",
				},
				&search.Claim{
					BlobRef:   rootClaim,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      rootClaimTime.UTC(),
					Type:      "set-attribute",
					Attr:      "camliRoot",
					Value:     "rootval",
				},
				&search.Claim{
					BlobRef:   memberRef,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      memberRefTime.UTC(),
					Type:      "add-attribute",
					Attr:      "camliMember",
					Value:     pnChild.String(),
				},
			})
			if !reflect.DeepEqual(claims, want) {
				t.Errorf("GetOwnerClaims results differ.\n got: %v\nwant: %v",
					claims, want)
			}
		}
	}
}

// populate hits the blobstore to populate map of child nodes.
func (n *mutDir) populate() error {
	n.mu.Lock()
	defer n.mu.Unlock()

	// Only re-populate if we haven't done so recently.
	now := time.Now()
	if n.lastPop.Add(populateInterval).After(now) {
		return nil
	}
	n.lastPop = now

	res, err := n.fs.client.Describe(&search.DescribeRequest{
		BlobRef: n.permanode,
		Depth:   3,
	})
	if err != nil {
		log.Println("mutDir.paths:", err)
		return nil
	}
	db := res.Meta[n.permanode.String()]
	if db == nil {
		return errors.New("dir blobref not described")
	}

	// Find all child permanodes and stick them in n.children
	if n.children == nil {
		n.children = make(map[string]mutFileOrDir)
	}
	currentChildren := map[string]bool{}
	for k, v := range db.Permanode.Attr {
		const p = "camliPath:"
		if !strings.HasPrefix(k, p) || len(v) < 1 {
			continue
		}
		name := k[len(p):]
		childRef := v[0]
		child := res.Meta[childRef]
		if child == nil {
			log.Printf("child not described: %v", childRef)
			continue
		}
		if child.Permanode == nil {
			log.Printf("invalid child, not a permanode: %v", childRef)
			continue
		}
		if target := child.Permanode.Attr.Get("camliSymlinkTarget"); target != "" {
			// This is a symlink.
			n.maybeAddChild(name, child.Permanode, &mutFile{
				fs:        n.fs,
				permanode: blob.ParseOrZero(childRef),
				parent:    n,
				name:      name,
				symLink:   true,
				target:    target,
			})
		} else if isDir(child.Permanode) {
			// This is a directory.
			n.maybeAddChild(name, child.Permanode, &mutDir{
				fs:        n.fs,
				permanode: blob.ParseOrZero(childRef),
				parent:    n,
				name:      name,
			})
		} else if contentRef := child.Permanode.Attr.Get("camliContent"); contentRef != "" {
			// This is a file.
			content := res.Meta[contentRef]
			if content == nil {
				log.Printf("child content not described: %v", childRef)
				continue
			}
			if content.CamliType != "file" {
				log.Printf("child not a file: %v", childRef)
				continue
			}
			if content.File == nil {
				log.Printf("camlitype \"file\" child %v has no described File member", childRef)
				continue
			}
			n.maybeAddChild(name, child.Permanode, &mutFile{
				fs:        n.fs,
				permanode: blob.ParseOrZero(childRef),
				parent:    n,
				name:      name,
				content:   blob.ParseOrZero(contentRef),
				size:      content.File.Size,
			})
		} else {
			// unhandled type...
			continue
		}
		currentChildren[name] = true
	}
	// Remove unreferenced children
	for name, oldchild := range n.children {
		if _, ok := currentChildren[name]; !ok {
			if oldchild.eligibleToDelete() {
				delete(n.children, name)
			}
		}
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
			got = append(got, r)
		}
		want := []blob.Ref{jpegFileRef, exifFileRef, mediaFileRef}
		if len(got) != len(want) {
			t.Errorf("GetDirMembers results differ.\n got: %v\nwant: %v",
				got, want)
		}
		for _, w := range want {
			found := false
			for _, g := range got {
				if w == g {
					found = true
					break
				}
			}
			if !found {
				t.Errorf("GetDirMembers: %v was not found.", w)
			}
		}
	}

	// GetBlobMeta
	{
		meta, err := id.Index.GetBlobMeta(pn)
		if err != nil {
			t.Errorf("GetBlobMeta(%q) = %v", pn, err)
		} else {
			if e := "permanode"; meta.CamliType != e {
				t.Errorf("GetBlobMeta(%q) mime = %q, want %q", pn, meta.CamliType, e)
			}
			if meta.Size == 0 {
				t.Errorf("GetBlobMeta(%q) size is zero", pn)
			}
		}
		_, err = id.Index.GetBlobMeta(blob.ParseOrZero("abc-123"))
		if err != os.ErrNotExist {
			t.Errorf("GetBlobMeta(dummy blobref) = %v; want os.ErrNotExist", err)
		}
	}

	// AppendClaims
	{
		claims, err := id.Index.AppendClaims(nil, pn, id.SignerBlobRef, "")
		if err != nil {
			t.Errorf("AppendClaims = %v", err)
		} else {
			want := []camtypes.Claim{
				{
					BlobRef:   br1,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      br1Time.UTC(),
					Type:      "set-attribute",
					Attr:      "tag",
					Value:     "foo1",
				},
				{
					BlobRef:   br2,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      br2Time.UTC(),
					Type:      "set-attribute",
					Attr:      "tag",
					Value:     "foo2",
				},
				{
					BlobRef:   rootClaim,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      rootClaimTime.UTC(),
					Type:      "set-attribute",
					Attr:      "camliRoot",
					Value:     "rootval",
				},
				{
					BlobRef:   memberRef,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      memberRefTime.UTC(),
					Type:      "add-attribute",
					Attr:      "camliMember",
					Value:     pnChild.String(),
				},
				{
					BlobRef:   br4,
					Permanode: pn,
					Signer:    id.SignerBlobRef,
					Date:      br4Time.UTC(),
					Type:      "del-attribute",
					Attr:      "title",
					Value:     "pony",
				},
			}
			if !reflect.DeepEqual(claims, want) {
				t.Errorf("AppendClaims results differ.\n got: %v\nwant: %v",
					claims, want)
			}
		}
	}
}

func PathsOfSignerTarget(t *testing.T, initIdx func() *index.Index) {
	id := NewIndexDeps(initIdx())
	id.Fataler = t
	defer id.DumpIndex(t)
	signer := id.SignerBlobRef
	pn := id.NewPermanode()
	t.Logf("uploaded permanode %q", pn)

	claim1 := id.SetAttribute(pn, "camliPath:somedir", "targ-123")
	claim1Time := id.LastTime().UTC()
	claim2 := id.SetAttribute(pn, "camliPath:with|pipe", "targ-124")
	claim2Time := id.LastTime().UTC()
	t.Logf("made path claims %q and %q", claim1, claim2)

	type test struct {
		blobref string
		want    int
	}
	tests := []test{
		{"targ-123", 1},
		{"targ-124", 1},
		{"targ-125", 0},
	}
	for _, tt := range tests {
		paths, err := id.Index.PathsOfSignerTarget(signer, blob.ParseOrZero(tt.blobref))
		if err != nil {
			t.Fatalf("PathsOfSignerTarget(%q): %v", tt.blobref, err)
		}
		if len(paths) != tt.want {
			t.Fatalf("PathsOfSignerTarget(%q) got %d results; want %d",
				tt.blobref, len(paths), tt.want)
		}
		if tt.blobref == "targ-123" {
			p := paths[0]
			want := fmt.Sprintf(
				"Path{Claim: %s, %v; Base: %s + Suffix \"somedir\" => Target targ-123}",
				claim1, claim1Time, pn)
			if g := p.String(); g != want {
				t.Errorf("claim wrong.\n got: %s\nwant: %s", g, want)
			}
		}
	}
	tests = []test{
		{"somedir", 1},
		{"with|pipe", 1},
		{"void", 0},
	}
	for _, tt := range tests {
		paths, err := id.Index.PathsLookup(id.SignerBlobRef, pn, tt.blobref)
		if err != nil {
			t.Fatalf("PathsLookup(%q): %v", tt.blobref, err)
		}
		if len(paths) != tt.want {
			t.Fatalf("PathsLookup(%q) got %d results; want %d",
				tt.blobref, len(paths), tt.want)
		}
		if tt.blobref == "with|pipe" {
			p := paths[0]
			want := fmt.Sprintf(
				"Path{Claim: %s, %s; Base: %s + Suffix \"with|pipe\" => Target targ-124}",
				claim2, claim2Time, pn)
			if g := p.String(); g != want {
				t.Errorf("claim wrong.\n got: %s\nwant: %s", g, want)
			}
		}
	}

	// now test deletions
	// Delete an existing value
	claim3 := id.Delete(claim2)
	t.Logf("claim %q deletes path claim %q", claim3, claim2)
	tests = []test{
		{"targ-123", 1},
		{"targ-124", 0},
		{"targ-125", 0},
	}
	for _, tt := range tests {
		signer := id.SignerBlobRef
		paths, err := id.Index.PathsOfSignerTarget(signer, blob.ParseOrZero(tt.blobref))
		if err != nil {
			t.Fatalf("PathsOfSignerTarget(%q): %v", tt.blobref, err)
		}
		if len(paths) != tt.want {
			t.Fatalf("PathsOfSignerTarget(%q) got %d results; want %d",
				tt.blobref, len(paths), tt.want)
		}
	}
	tests = []test{
		{"somedir", 1},
		{"with|pipe", 0},
		{"void", 0},
	}
	for _, tt := range tests {
		paths, err := id.Index.PathsLookup(id.SignerBlobRef, pn, tt.blobref)
		if err != nil {
			t.Fatalf("PathsLookup(%q): %v", tt.blobref, err)
		}
		if len(paths) != tt.want {
			t.Fatalf("PathsLookup(%q) got %d results; want %d",
				tt.blobref, len(paths), tt.want)
//.........這裏部分代碼省略.........