[#117] Add mocked handler for tests

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

internal/handler/handler.go

@@ -12,16 +12,15 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/data"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/handler/middleware"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/resolver"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils"
+	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
-	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/pool"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 	"github.com/valyala/fasthttp"
 	"go.uber.org/zap"
@@ -35,20 +34,125 @@ type Config interface {
 	NamespaceHeader() string
 }
 
+// PrmContainer groups parameters of FrostFS.Container operation.
+type PrmContainer struct {
+	// Container identifier.
+	ContainerID cid.ID
+}
+
+// PrmAuth groups authentication parameters for the FrostFS operation.
+type PrmAuth struct {
+	// Bearer token to be used for the operation. Overlaps PrivateKey. Optional.
+	BearerToken *bearer.Token
+}
+
+// PrmObjectRead groups parameters of FrostFS.ReadObject operation.
+type PrmObjectRead struct {
+	// Authentication parameters.
+	PrmAuth
+
+	// Address to read the object header from.
+	Address oid.Address
+
+	// Flag to read object header.
+	WithHeader bool
+
+	// Flag to read object payload. False overlaps payload range.
+	WithPayload bool
+
+	// Offset-length range of the object payload to be read.
+	PayloadRange [2]uint64
+}
+
+// ObjectPart represents partially read FrostFS object.
+type ObjectPart struct {
+	// Object header with optional in-memory payload part.
+	Head *object.Object
+
+	// Object payload part encapsulated in io.Reader primitive.
+	// Returns ErrAccessDenied on read access violation.
+	Payload io.ReadCloser
+}
+
+// PrmObjectCreate groups parameters of FrostFS.CreateObject operation.
+type PrmObjectCreate struct {
+	// Authentication parameters.
+	PrmAuth
+
+	Object *object.Object
+
+	// Object payload encapsulated in io.Reader primitive.
+	Payload io.Reader
+
+	// Enables client side object preparing.
+	ClientCut bool
+
+	// Disables using Tillich-Zémor hash for payload.
+	WithoutHomomorphicHash bool
+
+	// Sets max buffer size to read payload.
+	BufferMaxSize uint64
+}
+
+// PrmObjectSearch groups parameters of FrostFS.sear SearchObjects operation.
+type PrmObjectSearch struct {
+	// Authentication parameters.
+	PrmAuth
+
+	// Container to select the objects from.
+	Container cid.ID
+
+	Filters object.SearchFilters
+}
+
+type ResObjectSearch interface {
+	Read(buf []oid.ID) (int, error)
+	Iterate(f func(oid.ID) bool) error
+	Close()
+}
+
+var (
+	// ErrAccessDenied is returned from FrostFS in case of access violation.
+	ErrAccessDenied = errors.New("access denied")
+	// ErrGatewayTimeout is returned from FrostFS in case of timeout, deadline exceeded etc.
+	ErrGatewayTimeout = errors.New("gateway timeout")
+)
+
+// FrostFS represents virtual connection to FrostFS network.
+type FrostFS interface {
+	Container(context.Context, PrmContainer) (*container.Container, error)
+	ReadObject(context.Context, PrmObjectRead) (*ObjectPart, error)
+	CreateObject(context.Context, PrmObjectCreate) (oid.ID, error)
+	SearchObjects(context.Context, PrmObjectSearch) (ResObjectSearch, error)
+	utils.EpochInfoFetcher
+}
+
+type ContainerResolver interface {
+	Resolve(ctx context.Context, name string) (*cid.ID, error)
+}
+
 type Handler struct {
 	log               *zap.Logger
-	pool              *pool.Pool
+	frostfs           FrostFS
 	ownerID           *user.ID
 	config            Config
-	containerResolver *resolver.ContainerResolver
+	containerResolver ContainerResolver
 	tree              *tree.Tree
 	cache             *cache.BucketCache
 }
 
-func New(params *utils.AppParams, config Config, tree *tree.Tree) *Handler {
+type AppParams struct {
+	Logger   *zap.Logger
+	FrostFS  FrostFS
+	Owner    *user.ID
+	Resolver ContainerResolver
+	Cache    *cache.BucketCache
+}
+
+func New(params *AppParams, config Config, tree *tree.Tree) *Handler {
 	return &Handler{
 		log:               params.Logger,
-		pool:              params.Pool,
+		frostfs:           params.FrostFS,
 		ownerID:           params.Owner,
 		config:            config,
 		containerResolver: params.Resolver,
@@ -235,8 +339,8 @@ func (h *Handler) getBucketInfo(ctx context.Context, containerName string, log *
 }
 
 func (h *Handler) readContainer(ctx context.Context, cnrID cid.ID) (*data.BucketInfo, error) {
-	prm := pool.PrmContainerGet{ContainerID: cnrID}
-	res, err := h.pool.GetContainer(ctx, prm)
+	prm := PrmContainer{ContainerID: cnrID}
+	res, err := h.frostfs.Container(ctx, prm)
 	if err != nil {
 		return nil, fmt.Errorf("get frostfs container '%s': %w", cnrID.String(), err)
 	}
@@ -246,12 +350,12 @@ func (h *Handler) readContainer(ctx context.Context, cnrID cid.ID) (*data.Bucket
 		Name: cnrID.EncodeToString(),
 	}
 
-	if domain := container.ReadDomain(res); domain.Name() != "" {
+	if domain := container.ReadDomain(*res); domain.Name() != "" {
 		bktInfo.Name = domain.Name()
 		bktInfo.Zone = domain.Zone()
 	}
 
-	bktInfo.HomomorphicHashDisabled = container.IsHomomorphicHashingDisabled(res)
+	bktInfo.HomomorphicHashDisabled = container.IsHomomorphicHashingDisabled(*res)
 
 	return bktInfo, err
 }