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memory.go
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memory.go
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// Copyright 2018-2020 CERN
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// In applying this license, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
package memory
import (
"context"
"encoding/json"
"errors"
"fmt"
"math/rand"
"sync"
"time"
user "github.com/cs3org/go-cs3apis/cs3/identity/user/v1beta1"
link "github.com/cs3org/go-cs3apis/cs3/sharing/link/v1beta1"
provider "github.com/cs3org/go-cs3apis/cs3/storage/provider/v1beta1"
typespb "github.com/cs3org/go-cs3apis/cs3/types/v1beta1"
"github.com/cs3org/reva/pkg/appctx"
"github.com/cs3org/reva/pkg/publicshare"
"github.com/cs3org/reva/pkg/publicshare/manager/registry"
)
func init() {
registry.Register("memory", New)
}
// New returns a new memory manager.
func New(c map[string]interface{}) (publicshare.Manager, error) {
return &manager{
shares: sync.Map{},
}, nil
}
type manager struct {
shares sync.Map
}
var (
passwordProtected bool
)
// CreatePublicShare adds a new entry to manager.shares
func (m *manager) CreatePublicShare(ctx context.Context, u *user.User, rInfo *provider.ResourceInfo, g *link.Grant) (*link.PublicShare, error) {
id := &link.PublicShareId{
OpaqueId: randString(15),
}
tkn := randString(15)
now := uint64(time.Now().Unix())
displayName, ok := rInfo.ArbitraryMetadata.Metadata["name"]
if !ok {
displayName = tkn
}
if g.Password != "" {
passwordProtected = true
}
createdAt := &typespb.Timestamp{
Seconds: now,
Nanos: uint32(now % 1000000000),
}
modifiedAt := &typespb.Timestamp{
Seconds: now,
Nanos: uint32(now % 1000000000),
}
s := link.PublicShare{
Id: id,
Owner: rInfo.GetOwner(),
Creator: u.Id,
ResourceId: rInfo.Id,
Token: tkn,
Permissions: g.Permissions,
Ctime: createdAt,
Mtime: modifiedAt,
PasswordProtected: passwordProtected,
Expiration: g.Expiration,
DisplayName: displayName,
}
m.shares.Store(s.Token, &s)
return &s, nil
}
// UpdatePublicShare updates the expiration date, permissions and Mtime
func (m *manager) UpdatePublicShare(ctx context.Context, u *user.User, req *link.UpdatePublicShareRequest, g *link.Grant) (*link.PublicShare, error) {
log := appctx.GetLogger(ctx)
share, err := m.GetPublicShare(ctx, u, req.Ref)
if err != nil {
return nil, errors.New("ref does not exist")
}
token := share.GetToken()
switch req.GetUpdate().GetType() {
case link.UpdatePublicShareRequest_Update_TYPE_DISPLAYNAME:
log.Debug().Str("memory", "update display name").Msgf("from: `%v` to `%v`", share.DisplayName, req.Update.GetDisplayName())
share.DisplayName = req.Update.GetDisplayName()
case link.UpdatePublicShareRequest_Update_TYPE_PERMISSIONS:
old, _ := json.Marshal(share.Permissions)
new, _ := json.Marshal(req.Update.GetGrant().Permissions)
log.Debug().Str("memory", "update grants").Msgf("from: `%v`\nto\n`%v`", old, new)
share.Permissions = req.Update.GetGrant().GetPermissions()
case link.UpdatePublicShareRequest_Update_TYPE_EXPIRATION:
old, _ := json.Marshal(share.Expiration)
new, _ := json.Marshal(req.Update.GetGrant().Expiration)
log.Debug().Str("memory", "update expiration").Msgf("from: `%v`\nto\n`%v`", old, new)
share.Expiration = req.Update.GetGrant().Expiration
case link.UpdatePublicShareRequest_Update_TYPE_PASSWORD:
// TODO(refs) Do public shares need Grants? Struct is defined, just not used. Fill this once it's done.
fallthrough
default:
return nil, fmt.Errorf("invalid update type: %v", req.GetUpdate().GetType())
}
// share.Expiration = g.Expiration
share.Mtime = &typespb.Timestamp{
Seconds: uint64(time.Now().Unix()),
Nanos: uint32(time.Now().Unix() % 1000000000),
}
m.shares.Store(token, share)
return share, nil
}
func (m *manager) GetPublicShare(ctx context.Context, u *user.User, ref *link.PublicShareReference) (share *link.PublicShare, err error) {
// TODO(refs) return an error if the share is expired.
// Attempt to fetch public share by token
if ref.GetToken() != "" {
share, err = m.GetPublicShareByToken(ctx, ref.GetToken(), "")
if err != nil {
return nil, errors.New("no shares found by token")
}
}
// Attempt to fetch public share by Id
if ref.GetId() != nil {
share, err = m.getPublicShareByTokenID(ctx, *ref.GetId())
if err != nil {
return nil, errors.New("no shares found by id")
}
}
return
}
func (m *manager) ListPublicShares(ctx context.Context, u *user.User, filters []*link.ListPublicSharesRequest_Filter, md *provider.ResourceInfo) ([]*link.PublicShare, error) {
// TODO(refs) filter out expired shares
shares := []*link.PublicShare{}
m.shares.Range(func(k, v interface{}) bool {
s := v.(*link.PublicShare)
// Skip if the share isn't created by the current user
if s.Creator.GetOpaqueId() == u.Id.OpaqueId && (s.Creator.GetIdp() == "" || u.Id.Idp == s.Creator.GetIdp()) {
if len(filters) == 0 {
shares = append(shares, s)
} else {
for _, f := range filters {
if f.Type == link.ListPublicSharesRequest_Filter_TYPE_RESOURCE_ID {
if s.ResourceId.StorageId == f.GetResourceId().StorageId && s.ResourceId.OpaqueId == f.GetResourceId().OpaqueId {
shares = append(shares, s)
}
}
}
}
}
return true
})
return shares, nil
}
func (m *manager) RevokePublicShare(ctx context.Context, u *user.User, id string) (err error) {
// check whether the reference exists
if _, err := m.GetPublicShareByToken(ctx, id, ""); err != nil {
return errors.New("reference does not exist")
}
m.shares.Delete(id)
return
}
func (m *manager) GetPublicShareByToken(ctx context.Context, token string, password string) (*link.PublicShare, error) {
if ps, ok := m.shares.Load(token); ok {
return ps.(*link.PublicShare), nil
}
return nil, errors.New("invalid token")
}
func randString(n int) string {
var l = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
b := make([]rune, n)
for i := range b {
b[i] = l[rand.Intn(len(l))]
}
return string(b)
}
func (m *manager) getPublicShareByTokenID(ctx context.Context, targetID link.PublicShareId) (*link.PublicShare, error) {
var found *link.PublicShare
m.shares.Range(func(k, v interface{}) bool {
id := v.(*link.PublicShare).GetId()
if targetID.String() == id.String() {
found = v.(*link.PublicShare)
}
return true
})
if found != nil {
return found, nil
}
return nil, errors.New("resource not found")
}