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handler-events-read.go
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/
handler-events-read.go
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/*
* Copyright (c) 2018. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
package views
import (
"context"
"encoding/json"
"io"
"github.com/micro/go-micro/client"
"github.com/micro/go-micro/errors"
"go.uber.org/zap"
"github.com/pydio/cells/common"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/micro"
"github.com/pydio/cells/common/proto/docstore"
"github.com/pydio/cells/common/proto/idm"
"github.com/pydio/cells/common/proto/tree"
"github.com/pydio/cells/common/utils/permissions"
)
type HandlerEventRead struct {
AbstractHandler
}
func (h *HandlerEventRead) feedNodeUuid(ctx context.Context, node *tree.Node) error {
response, e := h.next.ReadNode(ctx, &tree.ReadNodeRequest{Node: node})
if e != nil {
return e
}
node.Uuid = response.Node.Uuid
node.Type = response.Node.Type
return nil
}
func (h *HandlerEventRead) ListNodes(ctx context.Context, in *tree.ListNodesRequest, opts ...client.CallOption) (tree.NodeProvider_ListNodesClient, error) {
c, e := h.next.ListNodes(ctx, in, opts...)
if branchInfo, ok := GetBranchInfo(ctx, "in"); ok && branchInfo.Binary {
return c, e
}
if e == nil && in.Node != nil {
node := in.Node.Clone()
if node.Uuid == "" {
if e := h.feedNodeUuid(ctx, node); e != nil {
log.Logger(ctx).Error("HandlerEventRead did not find Uuid!", zap.Error(e))
}
}
if node.Uuid != "" {
go func() {
client.Publish(ctx, client.NewPublication(common.TOPIC_TREE_CHANGES, &tree.NodeChangeEvent{
Type: tree.NodeChangeEvent_READ,
Target: node,
}))
}()
}
}
return c, e
}
func (h *HandlerEventRead) GetObject(ctx context.Context, node *tree.Node, requestData *GetRequestData) (io.ReadCloser, error) {
logger := log.Logger(ctx)
var (
doc *docstore.Document
linkData *docstore.ShareDocument
)
if doc, linkData = h.sharedLinkWithDownloadLimit(ctx); doc != nil && linkData != nil {
// Check download limit!
if linkData.DownloadCount >= linkData.DownloadLimit {
return nil, errors.Forbidden("MaxDownloadsReached", "You are not allowed to download this document")
}
}
reader, e := h.next.GetObject(ctx, node, requestData)
if branchInfo, ok := GetBranchInfo(ctx, "in"); ok && branchInfo.Binary {
return reader, e
}
if e == nil && requestData.StartOffset == 0 {
eventNode := node.Clone()
if eventNode.Uuid == "" {
if e := h.feedNodeUuid(ctx, eventNode); e != nil {
logger.Debug("HandlerEventRead did not find Uuid!", zap.Error(e))
}
}
if eventNode.Uuid != "" {
go func() {
client.Publish(ctx, client.NewPublication(common.TOPIC_TREE_CHANGES, &tree.NodeChangeEvent{
Type: tree.NodeChangeEvent_READ,
Target: eventNode,
}))
}()
}
if doc != nil && linkData != nil {
go func() {
bgContext := context.Background()
linkData.DownloadCount++
newData, _ := json.Marshal(linkData)
doc.Data = string(newData)
store := docstore.NewDocStoreClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_DOCSTORE, defaults.NewClient())
_, e3 := store.PutDocument(bgContext, &docstore.PutDocumentRequest{StoreID: common.DOCSTORE_ID_SHARES, DocumentID: doc.ID, Document: doc})
if e3 == nil {
logger.Debug("Updated share download count " + doc.ID)
} else {
logger.Error("Docstore error while trying to increment link downloads count", zap.Error(e3))
}
}()
}
}
return reader, e
}
func (h *HandlerEventRead) sharedLinkWithDownloadLimit(ctx context.Context) (doc *docstore.Document, linkData *docstore.ShareDocument) {
userLogin, claims := permissions.FindUserNameInContext(ctx)
// TODO - Have the 'hidden' info directly in claims => could it be a profile instead ?
if claims.Profile != common.PYDIO_PROFILE_SHARED {
return
}
bgContext := context.Background()
user, e := permissions.SearchUniqueUser(bgContext, userLogin, "", &idm.UserSingleQuery{AttributeName: "hidden", AttributeValue: "true"})
if e != nil || user == nil {
return
}
// This is a unique hidden user - search corresponding link and update download number
store := docstore.NewDocStoreClient(common.SERVICE_GRPC_NAMESPACE_+common.SERVICE_DOCSTORE, defaults.NewClient())
// SEARCH WITH PRESET_LOGIN
stream, e := store.ListDocuments(bgContext, &docstore.ListDocumentsRequest{StoreID: common.DOCSTORE_ID_SHARES, Query: &docstore.DocumentQuery{
MetaQuery: "+SHARE_TYPE:minisite +PRESET_LOGIN:" + userLogin + "",
}})
if e != nil {
return
}
defer stream.Close()
for {
r, e := stream.Recv()
if e != nil {
break
}
doc = r.Document
break
}
if doc == nil {
// SEARCH WITH PRELOG_USER
stream2, e := store.ListDocuments(bgContext, &docstore.ListDocumentsRequest{StoreID: common.DOCSTORE_ID_SHARES, Query: &docstore.DocumentQuery{
MetaQuery: "+SHARE_TYPE:minisite +PRELOG_USER:" + userLogin + "",
}})
if e != nil {
return
}
defer stream2.Close()
for {
r, e := stream2.Recv()
if e != nil {
break
}
doc = r.Document
break
}
}
if doc != nil {
var data *docstore.ShareDocument
if e2 := json.Unmarshal([]byte(doc.Data), &data); e2 == nil && data.DownloadLimit > 0 {
linkData = data
}
}
return
}