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handler-data-upload-limit.go
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/
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/proto/tree"
"github.com/pydio/minio-go"
)
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 := a.getUploadLimits()
if size > 0 && requestData.Size > size {
return 0, errors.Forbidden(VIEWS_LIBRARY_NAME, 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(VIEWS_LIBRARY_NAME, 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 := a.getUploadLimits()
if size > 0 && requestData.Size > size {
return minio.ObjectPart{}, errors.Forbidden(VIEWS_LIBRARY_NAME, 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(VIEWS_LIBRARY_NAME, 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() (limit int64, extensions []string) {
if v := config.Get("frontend", "plugin", "core.uploader").StringMap(map[string]string{}); v != nil {
if u, ok := v["UPLOAD_MAX_SIZE"]; ok {
if l, e := strconv.ParseInt(u, 10, 64); e == nil {
limit = l
}
}
if exts, ok := v["ALLOWED_EXTENSIONS"]; ok && strings.Trim(exts, " ") != "" {
extensions = strings.Split(strings.Trim(exts, " "), ",")
}
}
return
}