GoToSocial/vendor/github.com/minio/minio-go/v7/api-get-object-acl.go
Dominik Süß 9d0df426da
[feature] S3 support (#674)
* feat: vendor minio client

* feat: introduce storage package with s3 support

* feat: serve s3 files directly

this saves a lot of bandwith as the files are fetched from the object
store directly

* fix: use explicit local storage in tests

* feat: integrate s3 storage with the main server

* fix: add s3 config to cli tests

* docs: explicitly set values in example config

also adds license header to the storage package

* fix: use better http status code on s3 redirect

HTTP 302 Found is the best fit, as it signifies that the resource
requested was found but not under its presumed URL

307/TemporaryRedirect would mean that this resource is usually located
here, not in this case

303/SeeOther indicates that the redirection does not link to the
requested resource but to another page

* refactor: use context in storage driver interface
2022-07-03 12:08:30 +02:00

153 lines
4.2 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"
"encoding/xml"
"net/http"
"net/url"
)
// Grantee represents the person being granted permissions.
type Grantee struct {
XMLName xml.Name `xml:"Grantee"`
ID string `xml:"ID"`
DisplayName string `xml:"DisplayName"`
URI string `xml:"URI"`
}
// Grant holds grant information
type Grant struct {
XMLName xml.Name `xml:"Grant"`
Grantee Grantee
Permission string `xml:"Permission"`
}
// AccessControlList contains the set of grantees and the permissions assigned to each grantee.
type AccessControlList struct {
XMLName xml.Name `xml:"AccessControlList"`
Grant []Grant
Permission string `xml:"Permission"`
}
type accessControlPolicy struct {
XMLName xml.Name `xml:"AccessControlPolicy"`
Owner Owner
AccessControlList AccessControlList
}
// GetObjectACL get object ACLs
func (c *Client) GetObjectACL(ctx context.Context, bucketName, objectName string) (*ObjectInfo, error) {
resp, err := c.executeMethod(ctx, http.MethodGet, 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(ctx, bucketName, objectName, StatObjectOptions{})
if err != nil {
return nil, err
}
objInfo.Owner.DisplayName = res.Owner.DisplayName
objInfo.Owner.ID = res.Owner.ID
objInfo.Grant = append(objInfo.Grant, res.AccessControlList.Grant...)
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
}