Golang blob.Parse函數代碼示例

func kvDeleted(k string) (c camtypes.Claim, ok bool) {
	// TODO(bradfitz): garbage
	keyPart := strings.Split(k, "|")
	if len(keyPart) != 4 {
		return
	}
	if keyPart[0] != "deleted" {
		return
	}
	target, ok := blob.Parse(keyPart[1])
	if !ok {
		return
	}
	claimRef, ok := blob.Parse(keyPart[3])
	if !ok {
		return
	}
	date, err := time.Parse(time.RFC3339, unreverseTimeString(keyPart[2]))
	if err != nil {
		return
	}
	return camtypes.Claim{
		BlobRef: claimRef,
		Target:  target,
		Date:    date,
		Type:    string(schema.DeleteClaim),
	}, true
}

func (sto *s3Storage) EnumerateBlobs(ctx *context.Context, dest chan<- blob.SizedRef, after string, limit int) (err error) {
	defer close(dest)
	if faultEnumerate.FailErr(&err) {
		return
	}
	startAt := after
	if _, ok := blob.Parse(after); ok {
		startAt = nextStr(after)
	}
	objs, err := sto.s3Client.ListBucket(sto.bucket, startAt, limit)
	if err != nil {
		log.Printf("s3 ListBucket: %v", err)
		return err
	}
	for _, obj := range objs {
		if obj.Key == after {
			continue
		}
		br, ok := blob.Parse(obj.Key)
		if !ok {
			continue
		}
		select {
		case dest <- blob.SizedRef{Ref: br, Size: uint32(obj.Size)}:
		case <-ctx.Done():
			return context.ErrCanceled
		}
	}
	return nil
}

func (sto *s3Storage) EnumerateBlobs(ctx context.Context, dest chan<- blob.SizedRef, after string, limit int) (err error) {
	defer close(dest)
	if faultEnumerate.FailErr(&err) {
		return
	}
	startAt := after
	if _, ok := blob.Parse(after); ok {
		startAt = nextStr(after)
	}
	objs, err := sto.s3Client.ListBucket(sto.bucket, sto.dirPrefix+startAt, limit)
	if err != nil {
		log.Printf("s3 ListBucket: %v", err)
		return err
	}
	for _, obj := range objs {
		dir, file := path.Split(obj.Key)
		if dir != sto.dirPrefix {
			continue
		}
		if file == after {
			continue
		}
		br, ok := blob.Parse(file)
		if !ok {
			// TODO(mpl): I've noticed that on GCS we error out for this case. Do the same here ?
			continue
		}
		select {
		case dest <- blob.SizedRef{Ref: br, Size: uint32(obj.Size)}:
		case <-ctx.Done():
			return ctx.Err()
		}
	}
	return nil
}

func kvEdgeBackward(k, v string) (edge *camtypes.Edge, ok bool) {
	// TODO(bradfitz): garbage
	keyPart := strings.Split(k, "|")
	valPart := strings.Split(v, "|")
	if len(keyPart) != 4 || len(valPart) != 2 {
		// TODO(mpl): use glog
		log.Printf("bogus keyEdgeBackward index entry: %q = %q", k, v)
		return
	}
	if keyPart[0] != "edgeback" {
		return
	}
	parentRef, ok := blob.Parse(keyPart[2])
	if !ok {
		log.Printf("bogus parent in keyEdgeBackward index entry: %q", keyPart[2])
		return
	}
	blobRef, ok := blob.Parse(keyPart[3])
	if !ok {
		log.Printf("bogus blobref in keyEdgeBackward index entry: %q", keyPart[3])
		return
	}
	return &camtypes.Edge{
		From:      parentRef,
		FromType:  valPart[0],
		FromTitle: valPart[1],
		BlobRef:   blobRef,
	}, true
}

func kvSignerAttrValue(k, v string) (c camtypes.Claim, ok bool) {
	// TODO(bradfitz): garbage
	keyPart := strings.Split(k, "|")
	valPart := strings.Split(v, "|")
	if len(keyPart) != 6 || len(valPart) != 1 {
		// TODO(mpl): use glog
		log.Printf("bogus keySignerAttrValue index entry: %q = %q", k, v)
		return
	}
	if keyPart[0] != "signerattrvalue" {
		return
	}
	date, err := time.Parse(time.RFC3339, unreverseTimeString(keyPart[4]))
	if err != nil {
		log.Printf("bogus time in keySignerAttrValue index entry: %q", keyPart[4])
		return
	}
	claimRef, ok := blob.Parse(keyPart[5])
	if !ok {
		log.Printf("bogus claim in keySignerAttrValue index entry: %q", keyPart[5])
		return
	}
	permaNode, ok := blob.Parse(valPart[0])
	if !ok {
		log.Printf("bogus permanode in keySignerAttrValue index entry: %q", valPart[0])
		return
	}
	return camtypes.Claim{
		BlobRef:   claimRef,
		Permanode: permaNode,
		Date:      date,
		Attr:      urld(keyPart[2]),
		Value:     urld(keyPart[3]),
	}, true
}

func (x *Index) PathsOfSignerTarget(signer, target blob.Ref) (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, ok := blob.Parse(keyPart[2])
		if !ok {
			continue
		}
		baseRef, ok := blob.Parse(valPart[1])
		if !ok {
			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
}

func (x *Index) PathsLookup(signer, base blob.Ref, suffix string) (paths []*search.Path, err error) {
	paths = []*search.Path{}
	keyId, err := x.keyId(signer)
	if err != nil {
		if err == ErrNotFound {
			err = nil
		}
		return
	}

	it := x.queryPrefix(keyPathForward, keyId, base, suffix)
	defer closeIterator(it, &err)
	for it.Next() {
		keyPart := strings.Split(it.Key(), "|")[1:]
		valPart := strings.Split(it.Value(), "|")
		if len(keyPart) < 5 || len(valPart) < 2 {
			continue
		}
		claimRef, ok := blob.Parse(keyPart[4])
		if !ok {
			continue
		}
		baseRef, ok := blob.Parse(keyPart[1])
		if !ok {
			continue
		}
		claimDate := unreverseTimeString(keyPart[3])
		suffix := urld(keyPart[2])
		target, ok := blob.Parse(valPart[1])
		if !ok {
			continue
		}

		// TODO(bradfitz): investigate what's up with deleted
		// forward path claims here.  Needs docs with the
		// interface too, and tests.
		active := valPart[0]
		_ = active

		path := &search.Path{
			Claim:     claimRef,
			ClaimDate: claimDate,
			Base:      baseRef,
			Suffix:    suffix,
			Target:    target,
		}
		paths = append(paths, path)
	}
	return
}

func (sh *Handler) serveFiles(rw http.ResponseWriter, req *http.Request) {
	ret := jsonMap()
	defer httputil.ReturnJSON(rw, ret)

	br, ok := blob.Parse(req.FormValue("wholedigest"))
	if !ok {
		ret["error"] = "Missing or invalid 'wholedigest' param"
		ret["errorType"] = "input"
		return
	}

	files, err := sh.index.ExistingFileSchemas(br)
	if err != nil {
		ret["error"] = err.Error()
		ret["errorType"] = "server"
		return
	}

	strList := []string{}
	for _, br := range files {
		strList = append(strList, br.String())
	}
	ret["files"] = strList
	return
}

func (c *shareCmd) RunCommand(args []string) error {
	unsigned := schema.NewShareRef(schema.ShareHaveRef, c.transitive)

	if c.search != "" {
		if len(args) != 0 {
			return cmdmain.UsageError("when using the -search flag, share takes zero arguments")
		}
		var q search.SearchQuery
		if err := json.Unmarshal([]byte(c.search), &q); err != nil {
			return cmdmain.UsageError(fmt.Sprintf("invalid search: %s", err))
		}
		unsigned.SetShareSearch(&q)
	} else {
		if len(args) != 1 {
			return cmdmain.UsageError("share takes at most one argument")
		}
		target, ok := blob.Parse(args[0])
		if !ok {
			return cmdmain.UsageError("invalid blobref")
		}
		unsigned.SetShareTarget(target)
	}

	if c.duration != 0 {
		unsigned.SetShareExpiration(time.Now().Add(c.duration))
	}

	pr, err := getUploader().UploadAndSignBlob(unsigned)
	handleResult("share", pr, err)
	return nil
}

// 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) blob.Ref {
	br, ok := blob.Parse(MustGet(req, param))
	if !ok {
		panic(InvalidParameterError(param))
	}
	return br
}

func (s *storage) EnumerateBlobs(ctx *context.Context, dest chan<- blob.SizedRef, after string, limit int) error {
	defer close(dest)
	iter := s.index.Find(after, "")
	n := 0
	for iter.Next() {
		if iter.Key() == after {
			continue
		}
		br, ok := blob.Parse(iter.Key())
		if !ok {
			panic("Bogus encrypt index key: " + iter.Key())
		}
		plainSize, ok := parseMetaValuePlainSize(iter.Value())
		if !ok {
			panic("Bogus encrypt index value: " + iter.Value())
		}
		select {
		case dest <- blob.SizedRef{br, plainSize}:
		case <-ctx.Done():
			return context.ErrCanceled
		}
		n++
		if limit != 0 && n >= limit {
			break
		}
	}
	return iter.Close()
}

// 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 blob.Ref, 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, ok2 := blob.Parse(cref)
			if !ok2 {
				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 (h *shareHandler) serveHTTP(rw http.ResponseWriter, req *http.Request) error {
	var err error
	pathSuffix := httputil.PathSuffix(req)
	if len(pathSuffix) == 0 {
		// This happens during testing because we don't go through PrefixHandler
		pathSuffix = strings.TrimLeft(req.URL.Path, "/")
	}
	pathParts := strings.SplitN(pathSuffix, "/", 2)
	blobRef, ok := blob.Parse(pathParts[0])
	if !ok {
		err = &shareError{code: invalidURL, response: badRequest,
			message: fmt.Sprintf("Malformed share pathSuffix: %s", pathSuffix)}
	} else {
		err = handleGetViaSharing(rw, req, blobRef, h.fetcher)
	}
	if se, ok := err.(*shareError); ok {
		switch se.response {
		case badRequest:
			httputil.BadRequestError(rw, err.Error())
		case unauthorizedRequest:
			log.Print(err)
			auth.SendUnauthorized(rw, req)
		}
	}
	return err
}

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, ok := blob.Parse(ownerBlobStr)
	if !ok {
		return nil, fmt.Errorf("search 'owner' has malformed blobref %q; expecting e.g. sha1-xxxxxxxxxxxx",
			ownerBlobStr)
	}
	return &Handler{
		index: indexer,
		owner: ownerBlobRef,
	}, nil
}

func (sh *Handler) serveFiles(rw http.ResponseWriter, req *http.Request) {
	var ret camtypes.FileSearchResponse
	defer httputil.ReturnJSON(rw, &ret)

	br, ok := blob.Parse(req.FormValue("wholedigest"))
	if !ok {
		ret.Error = "Missing or invalid 'wholedigest' param"
		ret.ErrorType = "input"
		return
	}

	files, err := sh.index.ExistingFileSchemas(br)
	if err != nil {
		ret.Error = err.Error()
		ret.ErrorType = "server"
		return
	}

	// the ui code expects an object
	if files == nil {
		files = []blob.Ref{}
	}

	ret.Files = files
	return
}