forked from pydio/cells
/
handler-data-upload-limit.go
144 lines (127 loc) · 4.47 KB
/
handler-data-upload-limit.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"
"fmt"
"io"
"path"
"strconv"
"strings"
"github.com/micro/go-micro/errors"
"github.com/pydio/cells/common/config"
"github.com/pydio/cells/common/log"
"github.com/pydio/cells/common/proto/idm"
"github.com/pydio/cells/common/proto/tree"
"github.com/pydio/cells/common/utils/permissions"
"github.com/pydio/minio-go"
)
// UploadLimitFilter restricts atomic uploads by extension and maximum size, based on the front plugins configuration.
type UploadLimitFilter struct {
AbstractHandler
}
// Check Upload Limits (size, extension) defined in the frontend on PutObject operation
func (a *UploadLimitFilter) PutObject(ctx context.Context, node *tree.Node, reader io.Reader, requestData *PutRequestData) (int64, error) {
size, exts, err := a.getUploadLimits(ctx)
if err != nil {
return 0, err
}
if size > 0 && requestData.Size > size {
return 0, errors.Forbidden("max.upload.limit", fmt.Sprintf("Upload limit is %d", size))
}
if len(exts) > 0 {
// Beware, Ext function includes the leading dot
nodeExt := path.Ext(node.GetPath())
allowed := false
for _, e := range exts {
if "."+strings.ToLower(e) == strings.ToLower(nodeExt) {
allowed = true
break
}
}
if !allowed {
return 0, errors.Forbidden("forbidden.upload.extensions", fmt.Sprintf("Extension %s is not allowed!", nodeExt))
}
}
return a.next.PutObject(ctx, node, reader, requestData)
}
// Check Upload Limits (size, extension) defined in the frontend on MultipartPutObjectPart
func (a *UploadLimitFilter) MultipartPutObjectPart(ctx context.Context, target *tree.Node, uploadID string, partNumberMarker int, reader io.Reader, requestData *PutRequestData) (minio.ObjectPart, error) {
size, exts, err := a.getUploadLimits(ctx)
if err != nil {
return minio.ObjectPart{}, err
}
if size > 0 && requestData.Size > size {
return minio.ObjectPart{}, errors.Forbidden("max.upload.limit", fmt.Sprintf("Upload limit is %d", size))
}
if len(exts) > 0 {
nodeExt := path.Ext(target.GetPath())
allowed := false
for _, e := range exts {
if strings.ToLower(e) == strings.ToLower(nodeExt) {
allowed = true
break
}
}
if !allowed {
return minio.ObjectPart{}, errors.Forbidden("forbidden.upload.extensions", fmt.Sprintf("Extension %s is not allowed!", nodeExt))
}
}
return a.next.MultipartPutObjectPart(ctx, target, uploadID, partNumberMarker, reader, requestData)
}
// Parse Upload Limits from config
func (a *UploadLimitFilter) getUploadLimits(ctx context.Context) (limit int64, extensions []string, err error) {
pName := "core.uploader"
maxSizeName := "UPLOAD_MAX_SIZE"
extensionsName := "ALLOWED_EXTENSIONS"
var stringExts string
if v := config.Get("frontend", "plugin", pName).StringMap(); v != nil {
if u, ok := v[maxSizeName]; ok {
if l, e := strconv.ParseInt(u, 10, 64); e == nil {
limit = l
}
}
if exts, ok := v[extensionsName]; ok && strings.Trim(exts, " ") != "" {
stringExts = strings.TrimSpace(exts)
}
}
if i, ok := GetBranchInfo(ctx, "in"); ok {
acl, e := permissions.AccessListFromContextClaims(ctx)
if e != nil {
err = e
return
}
if e := permissions.AccessListLoadFrontValues(ctx, acl); e != nil {
err = e
return
}
aclParams := acl.FlattenedFrontValues().Val("parameters", pName)
log.Logger(ctx).Debug("Checking upload max size from ACLs " + aclParams.String())
scopes := permissions.FrontValuesScopesFromWorkspaces([]*idm.Workspace{&i.Workspace})
for _, s := range scopes {
limit = aclParams.Val(maxSizeName, s).Default(limit).Int64()
stringExts = aclParams.Val(extensionsName, s).Default(stringExts).String()
}
}
if stringExts != "" {
extensions = strings.Split(stringExts, ",")
}
return
}