[#151] index page: Add browse via native protocol

Signed-off-by: Nikita Zinkevich <n.zinkevich@yadro.com>

internal/handler/download.go

@@ -23,12 +23,16 @@ import (
 
 // DownloadByAddressOrBucketName handles download requests using simple cid/oid or bucketname/key format.
 func (h *Handler) DownloadByAddressOrBucketName(c *fasthttp.RequestCtx) {
-	cnrIDStr, _ := c.UserValue("cid").(string)
-	var cnrID cid.ID
-	if err := cnrID.DecodeString(cnrIDStr); err != nil {
-		h.byS3Path(c, h.receiveFile)
-	} else {
+	oidURLParam := c.UserValue("oid").(string)
+	downloadQueryParam := c.QueryArgs().GetBool("download")
+
+	switch {
+	case isObjectID(oidURLParam):
 		h.byNativeAddress(c, h.receiveFile)
+	case !isContainerRoot(oidURLParam) && (downloadQueryParam || !isDir(oidURLParam)):
+		h.byS3Path(c, h.receiveFile)
+	default:
+		h.browseIndex(c)
 	}
 }
 

internal/handler/handler.go

@@ -208,16 +208,6 @@ func (h *Handler) byNativeAddress(c *fasthttp.RequestCtx, f func(context.Context
 
 	objID := new(oid.ID)
 	if err = objID.DecodeString(idObj); err != nil {
-		if h.config.IndexPageEnabled() {
-			c.SetStatusCode(fasthttp.StatusNotFound)
-			h.browseObjects(c, browseParams{
-				bucketInfo:  bktInfo,
-				prefix:      idObj,
-				listObjects: h.getDirObjectsNative,
-				isNative:    true,
-			})
-			return
-		}
 		log.Error(logs.WrongObjectID, zap.Error(err))
 		response.Error(c, "wrong object id", fasthttp.StatusBadRequest)
 		return
@@ -233,7 +223,6 @@ func (h *Handler) byNativeAddress(c *fasthttp.RequestCtx, f func(context.Context
 func (h *Handler) byS3Path(c *fasthttp.RequestCtx, f func(context.Context, request, oid.Address)) {
 	bucketname := c.UserValue("cid").(string)
 	key := c.UserValue("oid").(string)
-	download := c.QueryArgs().GetBool("download")
 
 	ctx := utils.GetContextFromRequest(c)
 	reqLog := utils.GetReqLogOrDefault(ctx, h.log)
@@ -252,20 +241,6 @@ func (h *Handler) byS3Path(c *fasthttp.RequestCtx, f func(context.Context, reque
 	}
 
 	foundOid, err := h.tree.GetLatestVersion(ctx, &bktInfo.CID, unescapedKey)
-	if h.config.IndexPageEnabled() && !download && string(c.Method()) != fasthttp.MethodHead {
-		if isDir(unescapedKey) || isContainerRoot(unescapedKey) {
-			if code := checkErrorType(err); code == fasthttp.StatusNotFound || code == fasthttp.StatusOK {
-				c.SetStatusCode(code)
-				h.browseObjects(c, browseParams{
-					bucketInfo:  bktInfo,
-					prefix:      unescapedKey,
-					listObjects: h.getDirObjectsS3,
-					isNative:    false,
-				})
-				return
-			}
-		}
-	}
 	if err != nil {
 		if errors.Is(err, tree.ErrNodeAccessDenied) {
 			response.Error(c, "Access Denied", fasthttp.StatusForbidden)
@@ -412,3 +387,54 @@ func (h *Handler) readContainer(ctx context.Context, cnrID cid.ID) (*data.Bucket
 
 	return bktInfo, err
 }
+
+func (h *Handler) browseIndex(c *fasthttp.RequestCtx) {
+	if !h.config.IndexPageEnabled() {
+		c.SetStatusCode(fasthttp.StatusNotFound)
+		return
+	}
+
+	cidURLParam := c.UserValue("cid").(string)
+	oidURLParam := c.UserValue("oid").(string)
+
+	ctx := utils.GetContextFromRequest(c)
+	reqLog := utils.GetReqLogOrDefault(ctx, h.log)
+	log := reqLog.With(zap.String("cid", cidURLParam), zap.String("oid", oidURLParam))
+
+	unescapedKey, err := url.QueryUnescape(oidURLParam)
+	if err != nil {
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
+	bktInfo, err := h.getBucketInfo(ctx, cidURLParam, log)
+	if err != nil {
+		logAndSendBucketError(c, log, err)
+		return
+	}
+
+	c.SetStatusCode(fasthttp.StatusOK)
+
+	listFunc := h.getDirObjectsS3
+	isNativeList := false
+
+	err = h.tree.CheckSettingsNodeExist(ctx, bktInfo)
+	if err != nil {
+		if errors.Is(err, tree.ErrNodeNotFound) {
+			// tree probe failed, try to use native
+			listFunc = h.getDirObjectsNative
+			isNativeList = true
+		} else {
+			logAndSendBucketError(c, log, err)
+			return
+		}
+	}
+
+	c.SetStatusCode(fasthttp.StatusOK)
+	h.browseObjects(c, browseParams{
+		bucketInfo:  bktInfo,
+		prefix:      unescapedKey,
+		listObjects: listFunc,
+		isNative:    isNativeList,
+	})
+}

internal/handler/utils.go

@@ -2,14 +2,12 @@ package handler
 
 import (
 	"context"
-	"errors"
 	"strings"
 	"time"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/response"
 	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tokens"
-	"git.frostfs.info/TrueCloudLab/frostfs-http-gw/tree"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client"
 	cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
@@ -47,19 +45,13 @@ func isDir(name string) bool {
 	return strings.HasSuffix(name, "/")
 }
 
-func isContainerRoot(key string) bool {
-	return key == ""
+func isObjectID(s string) bool {
+	var objID oid.ID
+	return objID.DecodeString(s) == nil
 }
 
-func checkErrorType(err error) int {
-	switch {
-	case err == nil:
-		return fasthttp.StatusOK
-	case errors.Is(err, tree.ErrNodeAccessDenied):
-		return fasthttp.StatusForbidden
-	default:
-		return fasthttp.StatusNotFound
-	}
+func isContainerRoot(key string) bool {
+	return key == ""
 }
 
 func loadAttributes(attrs []object.Attribute) map[string]string {

tree/tree.go

@@ -30,6 +30,11 @@ type (
 		Meta  map[string]string
 	}
 
+	multiSystemNode struct {
+		// the first element is latest
+		nodes []*treeNode
+	}
+
 	GetNodesParams struct {
 		CnrID      cid.ID
 		BktInfo    *data.BucketInfo
@@ -50,18 +55,19 @@ var (
 )
 
 const (
-	FileNameKey = "FileName"
-)
+	FileNameKey      = "FileName"
+	settingsFileName = "bucket-settings"
 
-const (
-	oidKV = "OID"
+	oidKV      = "OID"
+	uploadIDKV = "UploadId"
+	sizeKV     = "Size"
 
 	// keys for delete marker nodes.
 	isDeleteMarkerKV = "IsDeleteMarker"
-	sizeKV           = "Size"
 
 	// versionTree -- ID of a tree with object versions.
 	versionTree = "version"
+	systemTree  = "system"
 
 	separator = "/"
 )
@@ -135,6 +141,45 @@ func newNodeVersionFromTreeNode(treeNode *treeNode) *api.NodeVersion {
 	return version
 }
 
+func newMultiNode(nodes []NodeResponse) (*multiSystemNode, error) {
+	var (
+		err          error
+		index        int
+		maxTimestamp uint64
+	)
+
+	if len(nodes) == 0 {
+		return nil, errors.New("multi node must have at least one node")
+	}
+
+	treeNodes := make([]*treeNode, len(nodes))
+
+	for i, node := range nodes {
+		if treeNodes[i], err = newTreeNode(node); err != nil {
+			return nil, fmt.Errorf("parse system node response: %w", err)
+		}
+
+		if timestamp := getMaxTimestamp(node); timestamp > maxTimestamp {
+			index = i
+			maxTimestamp = timestamp
+		}
+	}
+
+	treeNodes[0], treeNodes[index] = treeNodes[index], treeNodes[0]
+
+	return &multiSystemNode{
+		nodes: treeNodes,
+	}, nil
+}
+
+func (m *multiSystemNode) Latest() *treeNode {
+	return m.nodes[0]
+}
+
+func (m *multiSystemNode) Old() []*treeNode {
+	return m.nodes[1:]
+}
+
 func (c *Tree) GetLatestVersion(ctx context.Context, cnrID *cid.ID, objectName string) (*api.NodeVersion, error) {
 	nodes, err := c.GetVersions(ctx, cnrID, objectName)
 	if err != nil {
@@ -165,6 +210,55 @@ func (c *Tree) GetVersions(ctx context.Context, cnrID *cid.ID, objectName string
 	return c.service.GetNodes(ctx, p)
 }
 
+func (c *Tree) CheckSettingsNodeExist(ctx context.Context, bktInfo *data.BucketInfo) error {
+	_, err := c.getSystemNode(ctx, bktInfo, settingsFileName)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Tree) getSystemNode(ctx context.Context, bktInfo *data.BucketInfo, name string) (*multiSystemNode, error) {
+	p := &GetNodesParams{
+		CnrID:      bktInfo.CID,
+		BktInfo:    bktInfo,
+		TreeID:     systemTree,
+		Path:       []string{name},
+		LatestOnly: false,
+		AllAttrs:   true,
+	}
+	nodes, err := c.service.GetNodes(ctx, p)
+	if err != nil {
+		return nil, err
+	}
+
+	nodes = filterMultipartNodes(nodes)
+
+	if len(nodes) == 0 {
+		return nil, ErrNodeNotFound
+	}
+
+	return newMultiNode(nodes)
+}
+
+func filterMultipartNodes(nodes []NodeResponse) []NodeResponse {
+	res := make([]NodeResponse, 0, len(nodes))
+
+LOOP:
+	for _, node := range nodes {
+		for _, meta := range node.GetMeta() {
+			if meta.GetKey() == uploadIDKV {
+				continue LOOP
+			}
+		}
+
+		res = append(res, node)
+	}
+
+	return res
+}
+
 func getLatestVersionNode(nodes []NodeResponse) (NodeResponse, error) {
 	var (
 		maxCreationTime uint64