Golang blobserver.Loader类代码示例

func newRootFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (h http.Handler, err error) {
	u, err := user.Current()
	if err != nil {
		return
	}
	root := &RootHandler{
		BlobRoot:   conf.OptionalString("blobRoot", ""),
		SearchRoot: conf.OptionalString("searchRoot", ""),
		OwnerName:  conf.OptionalString("ownerName", u.Name),
	}
	root.Stealth = conf.OptionalBool("stealth", false)
	if err = conf.Validate(); err != nil {
		return
	}

	if root.BlobRoot != "" {
		bs, err := ld.GetStorage(root.BlobRoot)
		if err != nil {
			return nil, fmt.Errorf("Root handler's blobRoot of %q error: %v", root.BlobRoot, err)
		}
		root.Storage = bs
	}

	if root.SearchRoot != "" {
		h, _ := ld.GetHandler(root.SearchRoot)
		root.Search = h.(*search.Handler)
	}

	return root, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
	blobPrefix := config.RequiredString("blobSource")
	kvConfig := config.RequiredObject("storage")
	if err := config.Validate(); err != nil {
		return nil, err
	}
	kv, err := sorted.NewKeyValue(kvConfig)
	if err != nil {
		return nil, err
	}

	ix, err := New(kv)
	if err != nil {
		return nil, err
	}

	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		ix.Close()
		return nil, err
	}
	ix.BlobSource = sto

	// Good enough, for now:
	ix.KeyFetcher = ix.BlobSource

	return ix, 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 newMongoIndexFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
	blobPrefix := config.RequiredString("blobSource")
	mgw := &MongoWrapper{
		Servers:    config.OptionalString("host", "localhost"),
		Database:   config.RequiredString("database"),
		User:       config.OptionalString("user", ""),
		Password:   config.OptionalString("password", ""),
		Collection: collectionName,
	}
	if err := config.Validate(); err != nil {
		return nil, err
	}
	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		return nil, err
	}

	ix, err := newMongoIndex(mgw)
	if err != nil {
		return nil, err
	}
	ix.BlobSource = sto

	// Good enough, for now:
	ix.KeyFetcher = ix.BlobSource

	if wipe, _ := strconv.ParseBool(os.Getenv("CAMLI_MONGO_WIPE")); wipe {
		err = ix.Storage().Delete("")
		if err != nil {
			return nil, err
		}
	}

	return ix, err
}

func newFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (storage blobserver.Storage, err error) {
	sto := &condStorage{}

	receive := conf.OptionalStringOrObject("write")
	read := conf.RequiredString("read")
	remove := conf.OptionalString("remove", "")
	if err := conf.Validate(); err != nil {
		return nil, err
	}

	if receive != nil {
		sto.storageForReceive, err = buildStorageForReceive(ld, receive)
		if err != nil {
			return
		}
	}

	sto.read, err = ld.GetStorage(read)
	if err != nil {
		return
	}

	if remove != "" {
		sto.remove, err = ld.GetStorage(remove)
		if err != nil {
			return
		}
	}
	return sto, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
	blobPrefix := config.RequiredString("blobSource")
	kvConfig := config.RequiredObject("storage")
	if err := config.Validate(); err != nil {
		return nil, err
	}
	kv, err := sorted.NewKeyValue(kvConfig)
	if err != nil {
		return nil, err
	}
	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		return nil, err
	}

	ix, err := New(kv)
	// TODO(mpl): next time we need to do another fix, make a new error
	// type that lets us apply the needed fix depending on its value or
	// something. For now just one value/fix.
	if err == errMissingWholeRef {
		// TODO: maybe we don't want to do that automatically. Brad says
		// we have to think about the case on GCE/CoreOS in particular.
		if err := ix.fixMissingWholeRef(sto); err != nil {
			ix.Close()
			return nil, fmt.Errorf("could not fix missing wholeRef entries: %v", err)
		}
		ix, err = New(kv)
	}
	if err != nil {
		return nil, err
	}
	ix.InitBlobSource(sto)

	return ix, err
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
	blobPrefix := config.RequiredString("blobSource")
	file := config.RequiredString("file")
	if err := config.Validate(); err != nil {
		return nil, err
	}

	is, closer, err := NewStorage(file)
	if err != nil {
		return nil, err
	}

	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		closer.Close()
		return nil, err
	}

	ix := index.New(is)
	if err != nil {
		return nil, err
	}
	ix.BlobSource = sto

	// Good enough, for now:
	ix.KeyFetcher = ix.BlobSource

	return ix, err
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (storage blobserver.Storage, err error) {
	var (
		origin        = config.RequiredString("origin")
		cache         = config.RequiredString("cache")
		kvConf        = config.RequiredObject("meta")
		maxCacheBytes = config.OptionalInt64("maxCacheBytes", 512<<20)
	)
	if err := config.Validate(); err != nil {
		return nil, err
	}
	cacheSto, err := ld.GetStorage(cache)
	if err != nil {
		return nil, err
	}
	originSto, err := ld.GetStorage(origin)
	if err != nil {
		return nil, err
	}
	kv, err := sorted.NewKeyValue(kvConf)
	if err != nil {
		return nil, err
	}

	// TODO: enumerate through kv and calculate current size.
	// Maybe also even enumerate through cache to see if they match.
	// Or even: keep it only in memory and not in kv?

	s := &sto{
		origin:        originSto,
		cache:         cacheSto,
		maxCacheBytes: maxCacheBytes,
		kv:            kv,
	}
	return s, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (bs blobserver.Storage, err error) {
	sto := &storage{
		SimpleBlobHubPartitionMap: &blobserver.SimpleBlobHubPartitionMap{},
	}

	key := config.OptionalString("key", "")
	keyFile := config.OptionalString("keyFile", "")
	switch {
	case key != "":
		sto.key = []byte(key)
	case keyFile != "":
		// TODO: check that keyFile's unix permissions aren't too permissive.
		sto.key, err = ioutil.ReadFile(keyFile)
		if err != nil {
			return
		}
	}
	sto.blobs, err = ld.GetStorage(config.RequiredString("blobs"))
	if err != nil {
		return
	}
	sto.meta, err = ld.GetStorage(config.RequiredString("meta"))
	if err != nil {
		return
	}
	if err := config.Validate(); err != nil {
		return nil, err
	}
	if sto.key == nil {
		// TODO: add a way to prompt from stdin on start? or keychain support?
		return nil, errors.New("no encryption key set with 'key' or 'keyFile'")
	}
	return sto, nil
}

func indexFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (storage blobserver.Storage, err error) {
	is := &indexStorage{}
	var (
		blobPrefix = config.RequiredString("blobSource")
		ns         = config.OptionalString("namespace", "")
	)
	if err := config.Validate(); err != nil {
		return nil, err
	}
	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		return nil, err
	}
	is.ns, err = sanitizeNamespace(ns)
	if err != nil {
		return nil, err
	}

	ix, err := index.New(is)
	if err != nil {
		return nil, err
	}
	ix.BlobSource = sto
	ix.KeyFetcher = ix.BlobSource // TODO(bradfitz): global search? something else?
	return ix, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (blobserver.Storage, error) {
	blobPrefix := config.RequiredString("blobSource")
	postgresConf, err := postgres.ConfigFromJSON(config)
	if err != nil {
		return nil, err
	}
	kv, err := postgres.NewKeyValue(postgresConf)
	if err != nil {
		return nil, err
	}

	ix, err := index.New(kv)
	if err != nil {
		return nil, err
	}

	sto, err := ld.GetStorage(blobPrefix)
	if err != nil {
		ix.Close()
		return nil, err
	}
	ix.BlobSource = sto
	// Good enough, for now:
	ix.KeyFetcher = ix.BlobSource

	return ix, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (storage blobserver.Storage, err error) {
	sto := &replicaStorage{
		replicaPrefixes: config.RequiredList("backends"),
	}
	nReplicas := len(sto.replicaPrefixes)
	sto.minWritesForSuccess = config.OptionalInt("minWritesForSuccess", nReplicas)
	if err := config.Validate(); err != nil {
		return nil, err
	}
	if nReplicas == 0 {
		return nil, errors.New("replica: need at least one replica")
	}
	if sto.minWritesForSuccess == 0 {
		sto.minWritesForSuccess = nReplicas
	}
	sto.replicas = make([]blobserver.Storage, nReplicas)
	for i, prefix := range sto.replicaPrefixes {
		replicaSto, err := ld.GetStorage(prefix)
		if err != nil {
			return nil, err
		}
		sto.replicas[i] = replicaSto
	}
	return sto, nil
}

func newFromConfig(ld blobserver.Loader, config jsonconfig.Obj) (bs blobserver.Storage, err error) {
	sto := &storage{
		SimpleBlobHubPartitionMap: &blobserver.SimpleBlobHubPartitionMap{},
		index: index.NewMemoryStorage(), // TODO: temporary for development; let be configurable (mysql, etc)
	}
	agreement := config.OptionalString("I_AGREE", "")
	const wantAgreement = "that encryption support hasn't been peer-reviewed, isn't finished, and its format might change."
	if agreement != wantAgreement {
		return nil, errors.New("Use of the 'encrypt' target without the proper I_AGREE value.")
	}

	key := config.OptionalString("key", "")
	keyFile := config.OptionalString("keyFile", "")
	var keyb []byte
	switch {
	case key != "":
		keyb, err = hex.DecodeString(key)
		if err != nil || len(keyb) != 16 {
			return nil, fmt.Errorf("The 'key' parameter must be 16 bytes of 32 hex digits. (currently fixed at AES-128)")
		}
	case keyFile != "":
		// TODO: check that keyFile's unix permissions aren't too permissive.
		keyb, err = ioutil.ReadFile(keyFile)
		if err != nil {
			return nil, fmt.Errorf("Reading key file %v: %v", keyFile, err)
		}
	}
	blobStorage := config.RequiredString("blobs")
	metaStorage := config.RequiredString("meta")
	if err := config.Validate(); err != nil {
		return nil, err
	}

	sto.blobs, err = ld.GetStorage(blobStorage)
	if err != nil {
		return
	}
	sto.meta, err = ld.GetStorage(metaStorage)
	if err != nil {
		return
	}

	if keyb == nil {
		// TODO: add a way to prompt from stdin on start? or keychain support?
		return nil, errors.New("no encryption key set with 'key' or 'keyFile'")
	}

	if err := sto.setKey(keyb); err != nil {
		return nil, err
	}

	log.Printf("Reading encryption metadata...")
	if err := sto.readAllMetaBlobs(); err != nil {
		return nil, fmt.Errorf("Error scanning metadata on start-up: %v", err)
	}
	log.Printf("Read all encryption metadata.")

	return sto, nil
}

func newStatusFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (h http.Handler, err error) {
	if err := conf.Validate(); err != nil {
		return nil, err
	}
	return &StatusHandler{
		prefix:        ld.MyPrefix(),
		handlerFinder: ld,
	}, nil
}

func newFromConfig(ld blobserver.Loader, conf jsonconfig.Obj) (blobserver.Storage, error) {
	var (
		smallPrefix = conf.RequiredString("smallBlobs")
		largePrefix = conf.RequiredString("largeBlobs")
		metaConf    = conf.RequiredObject("metaIndex")
	)
	if err := conf.Validate(); err != nil {
		return nil, err
	}
	small, err := ld.GetStorage(smallPrefix)
	if err != nil {
		return nil, fmt.Errorf("failed to load smallBlobs at %s: %v", smallPrefix, err)
	}
	large, err := ld.GetStorage(largePrefix)
	if err != nil {
		return nil, fmt.Errorf("failed to load largeBlobs at %s: %v", largePrefix, err)
	}
	largeSubber, ok := large.(subFetcherStorage)
	if !ok {
		return nil, fmt.Errorf("largeBlobs at %q of type %T doesn't support fetching sub-ranges of blobs",
			largePrefix, large)
	}
	meta, err := sorted.NewKeyValue(metaConf)
	if err != nil {
		return nil, fmt.Errorf("failed to setup blobpacked metaIndex: %v", err)
	}
	sto := &storage{
		small: small,
		large: largeSubber,
		meta:  meta,
	}
	sto.init()

	recoveryMu.Lock()
	defer recoveryMu.Unlock()
	if recovery {
		log.Print("Starting recovery of blobpacked index")
		if err := meta.Close(); err != nil {
			return nil, err
		}
		if err := sto.reindex(context.TODO(), func() (sorted.KeyValue, error) {
			return sorted.NewKeyValue(metaConf)
		}); err != nil {
			return nil, err
		}
		return sto, nil
	}
	// Check for a weird state: zip files exist, but no metadata about them
	// is recorded. This is probably a corrupt state, and the user likely
	// wants to recover.
	if !sto.anyMeta() && sto.anyZipPacks() {
		log.Fatal("Error: blobpacked storage detects non-zero packed zips, but no metadata. Please re-start in recovery mode with -recovery.")
	}

	return sto, nil
}