mirror of https://github.com/restic/restic.git
137 lines
3.7 KiB
Go
137 lines
3.7 KiB
Go
/*
|
|
* Minio Go Library for Amazon S3 Compatible Cloud Storage
|
|
* Copyright 2018 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 minio
|
|
|
|
import (
|
|
"context"
|
|
"net/http"
|
|
"net/url"
|
|
)
|
|
|
|
type accessControlPolicy struct {
|
|
Owner struct {
|
|
ID string `xml:"ID"`
|
|
DisplayName string `xml:"DisplayName"`
|
|
} `xml:"Owner"`
|
|
AccessControlList struct {
|
|
Grant []struct {
|
|
Grantee struct {
|
|
ID string `xml:"ID"`
|
|
DisplayName string `xml:"DisplayName"`
|
|
URI string `xml:"URI"`
|
|
} `xml:"Grantee"`
|
|
Permission string `xml:"Permission"`
|
|
} `xml:"Grant"`
|
|
} `xml:"AccessControlList"`
|
|
}
|
|
|
|
//GetObjectACL get object ACLs
|
|
func (c Client) GetObjectACL(bucketName, objectName string) (*ObjectInfo, error) {
|
|
|
|
resp, err := c.executeMethod(context.Background(), "GET", requestMetadata{
|
|
bucketName: bucketName,
|
|
objectName: objectName,
|
|
queryValues: url.Values{
|
|
"acl": []string{""},
|
|
},
|
|
})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer closeResponse(resp)
|
|
|
|
if resp.StatusCode != http.StatusOK {
|
|
return nil, httpRespToErrorResponse(resp, bucketName, objectName)
|
|
}
|
|
|
|
res := &accessControlPolicy{}
|
|
|
|
if err := xmlDecoder(resp.Body, res); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
objInfo, err := c.statObject(context.Background(), bucketName, objectName, StatObjectOptions{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
cannedACL := getCannedACL(res)
|
|
if cannedACL != "" {
|
|
objInfo.Metadata.Add("X-Amz-Acl", cannedACL)
|
|
return &objInfo, nil
|
|
}
|
|
|
|
grantACL := getAmzGrantACL(res)
|
|
for k, v := range grantACL {
|
|
objInfo.Metadata[k] = v
|
|
}
|
|
|
|
return &objInfo, nil
|
|
}
|
|
|
|
func getCannedACL(aCPolicy *accessControlPolicy) string {
|
|
grants := aCPolicy.AccessControlList.Grant
|
|
|
|
switch {
|
|
case len(grants) == 1:
|
|
if grants[0].Grantee.URI == "" && grants[0].Permission == "FULL_CONTROL" {
|
|
return "private"
|
|
}
|
|
case len(grants) == 2:
|
|
for _, g := range grants {
|
|
if g.Grantee.URI == "http://acs.amazonaws.com/groups/global/AuthenticatedUsers" && g.Permission == "READ" {
|
|
return "authenticated-read"
|
|
}
|
|
if g.Grantee.URI == "http://acs.amazonaws.com/groups/global/AllUsers" && g.Permission == "READ" {
|
|
return "public-read"
|
|
}
|
|
if g.Permission == "READ" && g.Grantee.ID == aCPolicy.Owner.ID {
|
|
return "bucket-owner-read"
|
|
}
|
|
}
|
|
case len(grants) == 3:
|
|
for _, g := range grants {
|
|
if g.Grantee.URI == "http://acs.amazonaws.com/groups/global/AllUsers" && g.Permission == "WRITE" {
|
|
return "public-read-write"
|
|
}
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func getAmzGrantACL(aCPolicy *accessControlPolicy) map[string][]string {
|
|
grants := aCPolicy.AccessControlList.Grant
|
|
res := map[string][]string{}
|
|
|
|
for _, g := range grants {
|
|
switch {
|
|
case g.Permission == "READ":
|
|
res["X-Amz-Grant-Read"] = append(res["X-Amz-Grant-Read"], "id="+g.Grantee.ID)
|
|
case g.Permission == "WRITE":
|
|
res["X-Amz-Grant-Write"] = append(res["X-Amz-Grant-Write"], "id="+g.Grantee.ID)
|
|
case g.Permission == "READ_ACP":
|
|
res["X-Amz-Grant-Read-Acp"] = append(res["X-Amz-Grant-Read-Acp"], "id="+g.Grantee.ID)
|
|
case g.Permission == "WRITE_ACP":
|
|
res["X-Amz-Grant-Write-Acp"] = append(res["X-Amz-Grant-Write-Acp"], "id="+g.Grantee.ID)
|
|
case g.Permission == "FULL_CONTROL":
|
|
res["X-Amz-Grant-Full-Control"] = append(res["X-Amz-Grant-Full-Control"], "id="+g.Grantee.ID)
|
|
}
|
|
}
|
|
return res
|
|
}
|