minio/pkg/drivers/file/file_policy.go

112 lines
2.9 KiB
Go

/*
* Minimalist Object Storage, (C) 2015 Minio, Inc.
*
* 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.
*/
package file
import (
"os"
"path"
"encoding/json"
"github.com/minio-io/minio/pkg/drivers"
)
// GetBucketPolicy - GET bucket policy
func (file *fileDriver) GetBucketPolicy(bucket string) (drivers.BucketPolicy, error) {
file.lock.Lock()
defer file.lock.Unlock()
var p drivers.BucketPolicy
// verify bucket path legal
if drivers.IsValidBucket(bucket) == false {
return drivers.BucketPolicy{}, drivers.BucketNameInvalid{Bucket: bucket}
}
// get bucket path
bucketDir := path.Join(file.root, bucket)
// check if bucket exists
if _, err := os.Stat(bucketDir); err != nil {
return drivers.BucketPolicy{}, drivers.BucketNotFound{Bucket: bucket}
}
// get policy path
bucketPolicy := path.Join(file.root, bucket+"_policy.json")
filestat, err := os.Stat(bucketPolicy)
if os.IsNotExist(err) {
return drivers.BucketPolicy{}, drivers.BucketPolicyNotFound{Bucket: bucket}
}
if filestat.IsDir() {
return drivers.BucketPolicy{}, drivers.BackendCorrupted{Path: bucketPolicy}
}
f, err := os.OpenFile(bucketPolicy, os.O_RDONLY, 0666)
defer f.Close()
if err != nil {
return drivers.BucketPolicy{}, drivers.EmbedError(bucket, "", err)
}
encoder := json.NewDecoder(f)
err = encoder.Decode(&p)
if err != nil {
return drivers.BucketPolicy{}, drivers.EmbedError(bucket, "", err)
}
return p, nil
}
// CreateBucketPolicy - PUT bucket policy
func (file *fileDriver) CreateBucketPolicy(bucket string, p drivers.BucketPolicy) error {
file.lock.Lock()
defer file.lock.Unlock()
// verify bucket path legal
if drivers.IsValidBucket(bucket) == false {
return drivers.BucketNameInvalid{Bucket: bucket}
}
// get bucket path
bucketDir := path.Join(file.root, bucket)
// check if bucket exists
if _, err := os.Stat(bucketDir); err != nil {
return drivers.BucketNotFound{
Bucket: bucket,
}
}
// get policy path
bucketPolicy := path.Join(file.root, bucket+"_policy.json")
filestat, ret := os.Stat(bucketPolicy)
if !os.IsNotExist(ret) {
if filestat.IsDir() {
return drivers.BackendCorrupted{Path: bucketPolicy}
}
}
f, err := os.OpenFile(bucketPolicy, os.O_WRONLY|os.O_CREATE, 0600)
defer f.Close()
if err != nil {
return drivers.EmbedError(bucket, "", err)
}
encoder := json.NewEncoder(f)
err = encoder.Encode(p)
if err != nil {
return drivers.EmbedError(bucket, "", err)
}
return nil
}