Golang blobref.Parse函數代碼示例

func TestHubFiring(t *testing.T) {
	hub := &SimpleBlobHub{}
	ch := make(chan *blobref.BlobRef)
	bch := make(chan *blobref.BlobRef)
	blob := blobref.Parse("sha1-0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33")
	blobsame := blobref.Parse("sha1-0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33")

	hub.NotifyBlobReceived(blob) // no-op

	hub.RegisterListener(ch)
	hub.RegisterBlobListener(blob, bch)

	hub.NotifyBlobReceived(blobsame)

	tmr1 := time.NewTimer(1e9)
	select {
	case <-tmr1.C:
		t.Fatal("timer expired on receiving from ch")
	case got := <-ch:
		if !blob.Equal(got) {
			t.Fatalf("got wrong blob")
		}
	}

	select {
	case <-tmr1.C:
		t.Fatal("timer expired on receiving from bch")
	case got := <-bch:
		if !blob.Equal(got) {
			t.Fatalf("got wrong blob")
		}
	}
	tmr1.Stop()
}

// StaticSet returns the whole of the static set members of that directory
func (dr *DirReader) StaticSet() ([]*blobref.BlobRef, error) {
	if dr.staticSet != nil {
		return dr.staticSet, nil
	}
	staticSetBlobref := blobref.Parse(dr.ss.Entries)
	if staticSetBlobref == nil {
		return nil, fmt.Errorf("schema/filereader: Invalid blobref\n")
	}
	rsc, _, err := dr.fetcher.Fetch(staticSetBlobref)
	if err != nil {
		return nil, fmt.Errorf("schema/filereader: fetching schema blob %s: %v", staticSetBlobref, err)
	}
	ss, err := ParseSuperset(rsc)
	if err != nil {
		return nil, fmt.Errorf("schema/filereader: decoding schema blob %s: %v", staticSetBlobref, err)
	}
	if ss.Type != "static-set" {
		return nil, fmt.Errorf("schema/filereader: expected \"static-set\" schema blob for %s, got %q", staticSetBlobref, ss.Type)
	}
	for _, s := range ss.Members {
		member := blobref.Parse(s)
		if member == nil {
			return nil, fmt.Errorf("schema/filereader: invalid (static-set member) blobref\n")
		}
		dr.staticSet = append(dr.staticSet, member)
	}
	return dr.staticSet, nil
}

func (x *Index) PathsOfSignerTarget(signer, target *blobref.BlobRef) (paths []*search.Path, err error) {
	paths = []*search.Path{}
	keyId, err := x.keyId(signer)
	if err != nil {
		if err == ErrNotFound {
			err = nil
		}
		return
	}

	mostRecent := make(map[string]*search.Path)
	maxClaimDates := make(map[string]string)

	it := x.queryPrefix(keyPathBackward, keyId, target)
	defer closeIterator(it, &err)
	for it.Next() {
		keyPart := strings.Split(it.Key(), "|")[1:]
		valPart := strings.Split(it.Value(), "|")
		if len(keyPart) < 3 || len(valPart) < 4 {
			continue
		}
		claimRef := blobref.Parse(keyPart[2])
		baseRef := blobref.Parse(valPart[1])
		if claimRef == nil || baseRef == nil {
			continue
		}
		claimDate := valPart[0]
		active := valPart[2]
		suffix := urld(valPart[3])
		key := baseRef.String() + "/" + suffix

		if claimDate > maxClaimDates[key] {
			maxClaimDates[key] = claimDate
			if active == "Y" {
				mostRecent[key] = &search.Path{
					Claim:     claimRef,
					ClaimDate: claimDate,
					Base:      baseRef,
					Suffix:    suffix,
					Target:    target,
				}
			} else {
				delete(mostRecent, key)
			}
		}
	}
	for _, v := range mostRecent {
		paths = append(paths, v)
	}
	return paths, nil
}

// fromHTTP panics with an httputil value on failure
func (r *WithAttrRequest) fromHTTP(req *http.Request) {
	r.Signer = blobref.Parse(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()
}

// MustGetBlobRef returns a non-nil BlobRef from req, as given by param.
// If it doesn't, it panics with a value understood by Recover or RecoverJSON.
func MustGetBlobRef(req *http.Request, param string) *blobref.BlobRef {
	br := blobref.Parse(MustGet(req, param))
	if br == nil {
		panic(InvalidParameterError(param))
	}
	return br
}

func newHandlerFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (http.Handler, error) {
	indexPrefix := conf.RequiredString("index") // TODO: add optional help tips here?
	ownerBlobStr := conf.RequiredString("owner")
	devBlockStartupPrefix := conf.OptionalString("devBlockStartupOn", "")
	if err := conf.Validate(); err != nil {
		return nil, err
	}

	if devBlockStartupPrefix != "" {
		_, err := ld.GetHandler(devBlockStartupPrefix)
		if err != nil {
			return nil, fmt.Errorf("search handler references bogus devBlockStartupOn handler %s: %v", devBlockStartupPrefix, err)
		}
	}

	indexHandler, err := ld.GetHandler(indexPrefix)
	if err != nil {
		return nil, fmt.Errorf("search config references unknown handler %q", indexPrefix)
	}
	indexer, ok := indexHandler.(Index)
	if !ok {
		return nil, fmt.Errorf("search config references invalid indexer %q (actually a %T)", indexPrefix, indexHandler)
	}
	ownerBlobRef := blobref.Parse(ownerBlobStr)
	if ownerBlobRef == nil {
		return nil, fmt.Errorf("search 'owner' has malformed blobref %q; expecting e.g. sha1-xxxxxxxxxxxx",
			ownerBlobStr)
	}
	return &Handler{
		index: indexer,
		owner: ownerBlobRef,
	}, nil
}

// Given a described blob, optionally follows a camliContent and
// returns the file's schema blobref and its fileinfo (if found).
func (pr *publishRequest) fileSchemaRefFromBlob(des *search.DescribedBlob) (fileref *blobref.BlobRef, fileinfo *search.FileInfo, ok bool) {
	if des == nil {
		http.NotFound(pr.rw, pr.req)
		return
	}
	if des.Permanode != nil {
		// TODO: get "forceMime" attr out of the permanode? or
		// fileName content-disposition?
		if cref := des.Permanode.Attr.Get("camliContent"); cref != "" {
			cbr := blobref.Parse(cref)
			if cbr == nil {
				http.Error(pr.rw, "bogus camliContent", 500)
				return
			}
			des = des.PeerBlob(cbr)
			if des == nil {
				http.Error(pr.rw, "camliContent not a peer in describe", 500)
				return
			}
		}
	}
	if des.CamliType == "file" {
		return des.BlobRef, des.File, true
	}
	http.Error(pr.rw, "failed to find fileSchemaRefFromBlob", 404)
	return
}

func (x *Index) GetOwnerClaims(permaNode, owner *blobref.BlobRef) (cl search.ClaimList, err error) {
	keyId, err := x.keyId(owner)
	if err == ErrNotFound {
		err = nil
		return
	}
	if err != nil {
		return nil, err
	}
	prefix := pipes("claim", permaNode, keyId, "")
	it := x.queryPrefixString(prefix)
	defer closeIterator(it, &err)
	for it.Next() {
		keyPart := strings.Split(it.Key(), "|")
		valPart := strings.Split(it.Value(), "|")
		if len(keyPart) < 5 || len(valPart) < 3 {
			continue
		}
		claimRef := blobref.Parse(keyPart[4])
		if claimRef == nil {
			continue
		}
		date, _ := time.Parse(time.RFC3339, keyPart[3])
		cl = append(cl, &search.Claim{
			BlobRef:   claimRef,
			Signer:    owner,
			Permanode: permaNode,
			Date:      date,
			Type:      urld(valPart[0]),
			Attr:      urld(valPart[1]),
			Value:     urld(valPart[2]),
		})
	}
	return
}

func (ui *UIHandler) serveDownload(rw http.ResponseWriter, req *http.Request) {
	if ui.root.Storage == nil {
		http.Error(rw, "No BlobRoot configured", 500)
		return
	}

	suffix := req.Header.Get("X-PrefixHandler-PathSuffix")
	m := downloadPattern.FindStringSubmatch(suffix)
	if m == nil {
		httputil.ErrorRouting(rw, req)
		return
	}

	fbr := blobref.Parse(m[1])
	if fbr == nil {
		http.Error(rw, "Invalid blobref", 400)
		return
	}

	dh := &DownloadHandler{
		Fetcher: ui.root.Storage,
		Cache:   ui.Cache,
	}
	dh.ServeHTTP(rw, req, fbr)
}

// isDeleted returns whether br (a blobref or a claim) should be considered deleted.
func (x *Index) isDeleted(br *blobref.BlobRef) bool {
	var err error
	it := x.queryPrefix(keyDeleted, br)
	defer closeIterator(it, &err)
	for it.Next() {
		// parts are ["deleted", br.String(), blobref-of-delete-claim].
		// see keyDeleted in keys.go
		parts := strings.SplitN(it.Key(), "|", 3)
		if len(parts) != 3 {
			continue
		}
		delClaimRef := blobref.Parse(parts[2])
		if delClaimRef == nil {
			panic(fmt.Errorf("invalid deleted claim for %v", parts[1]))
		}
		// The recursive call on the blobref of the delete claim
		// checks that the claim itself was not deleted, in which case
		// br is not considered deleted anymore.
		// TODO(mpl): Each delete and undo delete adds a level of
		// recursion so this could recurse far. is there a way to
		// go faster in a worst case scenario?
		return !x.isDeleted(delClaimRef)
	}
	return false
}

func (vr *VerifyRequest) ParsePayloadMap() bool {
	vr.PayloadMap = make(map[string]interface{})
	pm := vr.PayloadMap

	if err := json.Unmarshal(vr.bpj, &pm); err != nil {
		return vr.fail("parse error; payload JSON is invalid")
	}

	if _, hasVersion := pm["camliVersion"]; !hasVersion {
		return vr.fail("missing 'camliVersion' in the JSON payload")
	}

	signer, hasSigner := pm["camliSigner"]
	if !hasSigner {
		return vr.fail("missing 'camliSigner' in the JSON payload")
	}

	if _, ok := signer.(string); !ok {
		return vr.fail("invalid 'camliSigner' in the JSON payload")
	}

	vr.CamliSigner = blobref.Parse(signer.(string))
	if vr.CamliSigner == nil {
		return vr.fail("malformed 'camliSigner' blobref in the JSON payload")
	}
	return true
}

func (c *attrCmd) RunCommand(args []string) error {
	if len(args) != 3 {
		return errors.New("Attr takes 3 args: <permanode> <attr> <value>")
	}
	permanode, attr, value := args[0], args[1], args[2]

	var err error

	pn := blobref.Parse(permanode)
	if pn == nil {
		return fmt.Errorf("Error parsing blobref %q", permanode)
	}
	bb := schema.NewSetAttributeClaim(pn, attr, value)
	if c.add {
		if c.del {
			return errors.New("Add and del options are exclusive")
		}
		bb = schema.NewAddAttributeClaim(pn, attr, value)
	} else {
		// TODO: del, which can make <value> be optional
		if c.del {
			return errors.New("del not yet implemented")
		}
	}
	put, err := getUploader().UploadAndSignBlob(bb)
	handleResult(bb.Type(), put, err)
	return nil
}

// TODO(rh): tame copy/paste code from cammount
func main() {
	client.AddFlags()
	flag.Parse()
	cacheDir, err := ioutil.TempDir("", "camlicache")
	if err != nil {
		log.Fatalf("Error creating temp cache directory: %v", err)
	}
	defer os.RemoveAll(cacheDir)
	diskcache, err := localdisk.New(cacheDir)
	if err != nil {
		log.Fatalf("Error setting up local disk cache: %v", err)
	}
	if flag.NArg() != 1 {
		log.Fatal("usage: camwebdav <blobref>")
	}
	br := blobref.Parse(flag.Arg(0))
	if br == nil {
		log.Fatalf("%s was not a valid blobref.", flag.Arg(0))
	}
	client := client.NewOrFail()
	fetcher := cacher.NewCachingFetcher(diskcache, client)

	f = fs.NewCamliFileSystem(fetcher, br)
	http.HandleFunc("/", webdav)
	err = http.ListenAndServe(*davaddr, nil)
	if err != nil {
		log.Fatalf("Error starting WebDAV server: %v", err)
	}
}

func (ui *UIHandler) serveFileTree(rw http.ResponseWriter, req *http.Request) {
	if ui.root.Storage == nil {
		http.Error(rw, "No BlobRoot configured", 500)
		return
	}

	suffix := req.Header.Get("X-PrefixHandler-PathSuffix")
	m := treePattern.FindStringSubmatch(suffix)
	if m == nil {
		httputil.ErrorRouting(rw, req)
		return
	}

	blobref := blobref.Parse(m[1])
	if blobref == nil {
		http.Error(rw, "Invalid blobref", 400)
		return
	}

	fth := &FileTreeHandler{
		Fetcher: ui.root.Storage,
		file:    blobref,
	}
	fth.ServeHTTP(rw, req)
}

func main() {
	// Scans the arg list and sets up flags
	debug := flag.Bool("debug", false, "print debugging messages.")
	client.AddFlags()
	flag.Parse()

	errorf := func(msg string, args ...interface{}) {
		fmt.Fprintf(os.Stderr, msg, args...)
		os.Exit(2)
	}

	if n := flag.NArg(); n < 1 || n > 2 {
		errorf("usage: cammount <mountpoint> [<root-blobref>]\n")
	}

	mountPoint := flag.Arg(0)

	client := client.NewOrFail() // automatic from flags

	cacheDir, err := ioutil.TempDir("", "camlicache")
	if err != nil {
		errorf("Error creating temp cache directory: %v\n", err)
	}
	defer os.RemoveAll(cacheDir)
	diskcache, err := localdisk.New(cacheDir)
	if err != nil {
		errorf("Error setting up local disk cache: %v", err)
	}
	fetcher := cacher.NewCachingFetcher(diskcache, client)

	var camfs *fs.CamliFileSystem
	if flag.NArg() == 2 {
		root := blobref.Parse(flag.Arg(1))
		if root == nil {
			errorf("Error parsing root blobref: %q\n", root)
		}
		var err error
		camfs, err = fs.NewRootedCamliFileSystem(fetcher, root)
		if err != nil {
			errorf("Error creating root with %v: %v", root, err)
		}
	} else {
		camfs = fs.NewCamliFileSystem(fetcher)
		log.Printf("starting with fs %#v", camfs)
	}

	if *debug {
		// TODO: set fs's logger
	}

	conn, err := fuse.Mount(mountPoint)
	if err != nil {
		log.Fatalf("Mount: %v", err)
	}
	err = conn.Serve(camfs)
	if err != nil {
		log.Fatalf("Serve: %v", err)
	}
	log.Printf("fuse process ending.")
}