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118 lines
3.7 KiB
118 lines
3.7 KiB
/*
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* Minio Cloud Storage, (C) 2015, 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"bytes"
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"io"
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"path"
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)
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// getOldBucketsConfigPath - get old buckets config path. (Only used for migrating old bucket policies)
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func getOldBucketsConfigPath() (string, error) {
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configPath, err := getConfigPath()
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if err != nil {
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return "", err
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}
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return path.Join(configPath, "buckets"), nil
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}
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// readBucketPolicyJSON - reads bucket policy for an input bucket, returns BucketPolicyNotFound
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// if bucket policy is not found.
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func readBucketPolicyJSON(bucket string, objAPI ObjectLayer) (bucketPolicyReader io.Reader, err error) {
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// Verify if bucket actually exists
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if err = isBucketExist(bucket, objAPI); err != nil {
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return nil, err
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}
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policyPath := pathJoin(bucketConfigPrefix, bucket, policyJSON)
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objInfo, err := objAPI.GetObjectInfo(minioMetaBucket, policyPath)
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err = errorCause(err)
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if err != nil {
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if _, ok := err.(ObjectNotFound); ok {
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return nil, BucketPolicyNotFound{Bucket: bucket}
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}
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errorIf(err, "Unable to load policy for the bucket %s.", bucket)
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return nil, err
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}
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var buffer bytes.Buffer
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err = objAPI.GetObject(minioMetaBucket, policyPath, 0, objInfo.Size, &buffer)
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err = errorCause(err)
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if err != nil {
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if _, ok := err.(ObjectNotFound); ok {
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return nil, BucketPolicyNotFound{Bucket: bucket}
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}
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errorIf(err, "Unable to load policy for the bucket %s.", bucket)
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return nil, err
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}
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return &buffer, nil
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}
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// readBucketPolicy - reads bucket policy for an input bucket, returns BucketPolicyNotFound
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// if bucket policy is not found. This function also parses the bucket policy into an object.
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func readBucketPolicy(bucket string, objAPI ObjectLayer) (*bucketPolicy, error) {
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// Read bucket policy JSON.
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bucketPolicyReader, err := readBucketPolicyJSON(bucket, objAPI)
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if err != nil {
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return nil, err
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}
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// Parse the saved policy.
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var policy = &bucketPolicy{}
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err = parseBucketPolicy(bucketPolicyReader, policy)
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if err != nil {
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return nil, err
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}
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return policy, nil
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}
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// removeBucketPolicy - removes any previously written bucket policy. Returns BucketPolicyNotFound
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// if no policies are found.
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func removeBucketPolicy(bucket string, objAPI ObjectLayer) error {
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// Verify if bucket actually exists
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if err := isBucketExist(bucket, objAPI); err != nil {
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return err
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}
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policyPath := pathJoin(bucketConfigPrefix, bucket, policyJSON)
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if err := objAPI.DeleteObject(minioMetaBucket, policyPath); err != nil {
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errorIf(err, "Unable to remove bucket-policy on bucket %s.", bucket)
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err = errorCause(err)
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if _, ok := err.(ObjectNotFound); ok {
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return BucketPolicyNotFound{Bucket: bucket}
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}
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return err
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}
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return nil
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}
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// writeBucketPolicy - save all bucket policies.
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func writeBucketPolicy(bucket string, objAPI ObjectLayer, reader io.Reader, size int64) error {
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// Verify if bucket actually exists
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if err := isBucketExist(bucket, objAPI); err != nil {
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return err
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}
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policyPath := pathJoin(bucketConfigPrefix, bucket, policyJSON)
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if _, err := objAPI.PutObject(minioMetaBucket, policyPath, size, reader, nil); err != nil {
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errorIf(err, "Unable to set policy for the bucket %s", bucket)
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return errorCause(err)
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}
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return nil
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}
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