106 lines
3.2 KiB
Go
106 lines
3.2 KiB
Go
/*
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* Minio Go Library for Amazon S3 Compatible 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 minio
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import (
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"encoding/json"
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"io/ioutil"
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"net/http"
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"net/url"
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"github.com/minio/minio-go/pkg/policy"
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)
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// GetBucketPolicy - get bucket policy at a given path.
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func (c Client) GetBucketPolicy(bucketName, objectPrefix string) (bucketPolicy policy.BucketPolicy, err error) {
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// Input validation.
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if err := isValidBucketName(bucketName); err != nil {
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return policy.BucketPolicyNone, err
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}
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if err := isValidObjectPrefix(objectPrefix); err != nil {
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return policy.BucketPolicyNone, err
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}
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policyInfo, err := c.getBucketPolicy(bucketName)
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if err != nil {
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errResponse := ToErrorResponse(err)
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if errResponse.Code == "NoSuchBucketPolicy" {
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return policy.BucketPolicyNone, nil
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}
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return policy.BucketPolicyNone, err
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}
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return policy.GetPolicy(policyInfo.Statements, bucketName, objectPrefix), nil
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}
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// ListBucketPolicies - list all policies for a given prefix and all its children.
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func (c Client) ListBucketPolicies(bucketName, objectPrefix string) (bucketPolicies map[string]policy.BucketPolicy, err error) {
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// Input validation.
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if err := isValidBucketName(bucketName); err != nil {
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return map[string]policy.BucketPolicy{}, err
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}
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if err := isValidObjectPrefix(objectPrefix); err != nil {
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return map[string]policy.BucketPolicy{}, err
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}
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policyInfo, err := c.getBucketPolicy(bucketName)
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if err != nil {
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errResponse := ToErrorResponse(err)
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if errResponse.Code == "NoSuchBucketPolicy" {
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return map[string]policy.BucketPolicy{}, nil
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}
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return map[string]policy.BucketPolicy{}, err
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}
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return policy.GetPolicies(policyInfo.Statements, bucketName), nil
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}
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// Default empty bucket access policy.
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var emptyBucketAccessPolicy = policy.BucketAccessPolicy{
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Version: "2012-10-17",
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}
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// Request server for current bucket policy.
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func (c Client) getBucketPolicy(bucketName string) (policy.BucketAccessPolicy, error) {
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// Get resources properly escaped and lined up before
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// using them in http request.
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urlValues := make(url.Values)
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urlValues.Set("policy", "")
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// Execute GET on bucket to list objects.
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resp, err := c.executeMethod("GET", requestMetadata{
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bucketName: bucketName,
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queryValues: urlValues,
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contentSHA256Bytes: emptySHA256,
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})
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defer closeResponse(resp)
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if err != nil {
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return emptyBucketAccessPolicy, err
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}
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if resp != nil {
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if resp.StatusCode != http.StatusOK {
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return emptyBucketAccessPolicy, httpRespToErrorResponse(resp, bucketName, "")
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}
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}
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bucketPolicyBuf, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return emptyBucketAccessPolicy, err
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}
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policy := policy.BucketAccessPolicy{}
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err = json.Unmarshal(bucketPolicyBuf, &policy)
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return policy, err
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}
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