Parse all headers beforehand and reject invalid requests. Another approach would be to remember the error and check it after `CalculateAction`, which is a bit faster. The rule of thumb here is "first validate, then use". Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
233 lines
5.4 KiB
Go
233 lines
5.4 KiB
Go
package v2
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import (
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"fmt"
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"github.com/nspcc-dev/neofs-api-go/v2/acl"
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objectV2 "github.com/nspcc-dev/neofs-api-go/v2/object"
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refsV2 "github.com/nspcc-dev/neofs-api-go/v2/refs"
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"github.com/nspcc-dev/neofs-api-go/v2/session"
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cid "github.com/nspcc-dev/neofs-sdk-go/container/id"
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eaclSDK "github.com/nspcc-dev/neofs-sdk-go/eacl"
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"github.com/nspcc-dev/neofs-sdk-go/object"
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objectSDKAddress "github.com/nspcc-dev/neofs-sdk-go/object/address"
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objectSDKID "github.com/nspcc-dev/neofs-sdk-go/object/id"
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sessionSDK "github.com/nspcc-dev/neofs-sdk-go/session"
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)
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type Option func(*cfg)
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type cfg struct {
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storage ObjectStorage
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msg xHeaderSource
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addr *objectSDKAddress.Address
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}
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type ObjectStorage interface {
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Head(*objectSDKAddress.Address) (*object.Object, error)
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}
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type Request interface {
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GetMetaHeader() *session.RequestMetaHeader
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}
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type Response interface {
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GetMetaHeader() *session.ResponseMetaHeader
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}
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type headerSource struct {
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requestHeaders []eaclSDK.Header
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objectHeaders []eaclSDK.Header
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}
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func defaultCfg() *cfg {
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return &cfg{
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storage: new(localStorage),
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}
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}
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func NewMessageHeaderSource(opts ...Option) (eaclSDK.TypedHeaderSource, error) {
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cfg := defaultCfg()
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for i := range opts {
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opts[i](cfg)
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}
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objHdrs, err := cfg.objectHeaders()
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if err != nil {
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return nil, err
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}
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return headerSource{
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objectHeaders: objHdrs,
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requestHeaders: requestHeaders(cfg.msg),
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}, nil
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}
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func (h headerSource) HeadersOfType(typ eaclSDK.FilterHeaderType) ([]eaclSDK.Header, bool) {
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switch typ {
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default:
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return nil, true
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case eaclSDK.HeaderFromRequest:
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return h.requestHeaders, true
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case eaclSDK.HeaderFromObject:
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return h.objectHeaders, true
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}
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}
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func requestHeaders(msg xHeaderSource) []eaclSDK.Header {
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xHdrs := msg.GetXHeaders()
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res := make([]eaclSDK.Header, 0, len(xHdrs))
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for i := range xHdrs {
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res = append(res, sessionSDK.NewXHeaderFromV2(&xHdrs[i]))
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}
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return res
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}
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func (h *cfg) objectHeaders() ([]eaclSDK.Header, error) {
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switch m := h.msg.(type) {
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default:
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panic(fmt.Sprintf("unexpected message type %T", h.msg))
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case *requestXHeaderSource:
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switch req := m.req.(type) {
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case *objectV2.GetRequest:
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return h.localObjectHeaders(h.addr)
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case *objectV2.HeadRequest:
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return h.localObjectHeaders(h.addr)
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case
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*objectV2.GetRangeRequest,
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*objectV2.GetRangeHashRequest,
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*objectV2.DeleteRequest:
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return addressHeaders(h.addr), nil
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case *objectV2.PutRequest:
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if v, ok := req.GetBody().GetObjectPart().(*objectV2.PutObjectPartInit); ok {
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oV2 := new(objectV2.Object)
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oV2.SetObjectID(v.GetObjectID())
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oV2.SetHeader(v.GetHeader())
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if h.addr == nil {
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idV2 := v.GetObjectID()
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var id objectSDKID.ID
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if idV2 != nil {
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if err := id.ReadFromV2(*idV2); err != nil {
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return nil, fmt.Errorf("can't parse object ID: %w", err)
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}
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}
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cnrV2 := v.GetHeader().GetContainerID()
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var cnr cid.ID
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if cnrV2 != nil {
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if err := cnr.ReadFromV2(*cnrV2); err != nil {
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return nil, fmt.Errorf("can't parse container ID: %w", err)
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}
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}
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h.addr = new(objectSDKAddress.Address)
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h.addr.SetContainerID(cnr)
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h.addr.SetObjectID(id)
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}
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hs := headersFromObject(object.NewFromV2(oV2), h.addr)
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return hs, nil
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}
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case *objectV2.SearchRequest:
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cnrV2 := req.GetBody().GetContainerID()
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var cnr cid.ID
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if cnrV2 != nil {
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if err := cnr.ReadFromV2(*cnrV2); err != nil {
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return nil, fmt.Errorf("can't parse container ID: %w", err)
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}
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}
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return []eaclSDK.Header{cidHeader(&cnr)}, nil
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}
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case *responseXHeaderSource:
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switch resp := m.resp.(type) {
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default:
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hs, _ := h.localObjectHeaders(h.addr)
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return hs, nil
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case *objectV2.GetResponse:
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if v, ok := resp.GetBody().GetObjectPart().(*objectV2.GetObjectPartInit); ok {
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oV2 := new(objectV2.Object)
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oV2.SetObjectID(v.GetObjectID())
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oV2.SetHeader(v.GetHeader())
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return headersFromObject(object.NewFromV2(oV2), h.addr), nil
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}
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case *objectV2.HeadResponse:
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oV2 := new(objectV2.Object)
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var hdr *objectV2.Header
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switch v := resp.GetBody().GetHeaderPart().(type) {
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case *objectV2.ShortHeader:
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hdr = new(objectV2.Header)
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id, _ := h.addr.ContainerID()
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var idV2 refsV2.ContainerID
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id.WriteToV2(&idV2)
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hdr.SetContainerID(&idV2)
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hdr.SetVersion(v.GetVersion())
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hdr.SetCreationEpoch(v.GetCreationEpoch())
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hdr.SetOwnerID(v.GetOwnerID())
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hdr.SetObjectType(v.GetObjectType())
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hdr.SetPayloadLength(v.GetPayloadLength())
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case *objectV2.HeaderWithSignature:
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hdr = v.GetHeader()
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}
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oV2.SetHeader(hdr)
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return headersFromObject(object.NewFromV2(oV2), h.addr), nil
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}
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}
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return nil, nil
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}
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func (h *cfg) localObjectHeaders(addr *objectSDKAddress.Address) ([]eaclSDK.Header, error) {
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obj, err := h.storage.Head(addr)
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if err != nil {
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// Still parse addressHeaders, because the errors is ignored in some places.
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return addressHeaders(addr), err
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}
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return headersFromObject(obj, addr), nil
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}
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func cidHeader(idCnr *cid.ID) eaclSDK.Header {
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return &sysObjHdr{
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k: acl.FilterObjectContainerID,
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v: cidValue(idCnr),
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}
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}
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func oidHeader(oid *objectSDKID.ID) eaclSDK.Header {
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return &sysObjHdr{
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k: acl.FilterObjectID,
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v: idValue(oid),
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}
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}
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func addressHeaders(addr *objectSDKAddress.Address) []eaclSDK.Header {
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cnr, _ := addr.ContainerID()
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res := make([]eaclSDK.Header, 1, 2)
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res[0] = cidHeader(&cnr)
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if oid, ok := addr.ObjectID(); ok {
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res = append(res, oidHeader(&oid))
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}
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return res
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}
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