/// 获取对象 ACL
public void GetObjectAcl()
{
//.cssg-snippet-body-start:[get-object-acl]
try
{
string bucket = "examplebucket-1250000000"; //存储桶，格式：BucketName-APPID
string key = "exampleobject"; //对象键
GetObjectACLRequest request = new GetObjectACLRequest(bucket, key);
//执行请求
GetObjectACLResult result = cosXml.GetObjectACL(request);
//对象的 ACL 信息
AccessControlPolicy acl = result.accessControlPolicy;
}
catch (COSXML.CosException.CosClientException clientEx)
{
//请求失败
Console.WriteLine("CosClientException: " + clientEx);
}
catch (COSXML.CosException.CosServerException serverEx)
{
//请求失败
Console.WriteLine("CosServerException: " + serverEx.GetInfo());
}
//.cssg-snippet-body-end
}
public async Task <AccessMode> GetObjectAclAsync(string bucketName, string objectName)
{
if (string.IsNullOrEmpty(bucketName))
{
throw new ArgumentNullException(nameof(bucketName));
}
if (string.IsNullOrEmpty(objectName))
{
throw new ArgumentNullException(nameof(objectName));
}
bool isPublicRead = false;
bool isPublicWrite = false;
//此处存在一个问题
//当储存桶权限设置为公共读，对象权限设置为继承，但是获取到的权限仍然是私有的。但是此时对象是可以呗公共访问到。
//同样，储存桶设置为公共读，对象设置为私有，获取到的权限仍然是私有的。
//获取储存桶权限
//AccessMode bucketMode = await GetBucketAclAsync(bucketName);
//switch (bucketMode)
//{
// case AccessMode.PublicRead:
// {
// isPublicRead = true;
// isPublicWrite = false;
// break;
// }
// case AccessMode.PublicReadWrite:
// {
// isPublicRead = true;
// isPublicWrite = true;
// break;
// }
// case AccessMode.Default:
// case AccessMode.Private:
// default:
// {
// isPublicRead = false;
// isPublicWrite = false;
// break;
// }
//}
bucketName = ConvertBucketName(bucketName);
GetObjectACLRequest request = new GetObjectACLRequest(bucketName, objectName);
GetObjectACLResult result = _client.GetObjectACL(request);
AccessControlPolicy acl = result.accessControlPolicy;
if (acl != null &&
acl.accessControlList != null &&
acl.accessControlList.grants != null &&
acl.accessControlList.grants.Count > 0)
{
foreach (var item in acl.accessControlList.grants)
{
if (string.IsNullOrEmpty(item.grantee.uri))
{
continue;
}
if (item.grantee.uri.Contains("allusers", StringComparison.OrdinalIgnoreCase))
{
switch (item.permission.ToLower())
{
case "read":
isPublicRead = true;
break;
case "write":
isPublicWrite = true;
break;
}
}
}
}
//结果
if (isPublicRead && !isPublicWrite)
{
return(await Task.FromResult(AccessMode.PublicRead));
}
else if (isPublicRead && isPublicWrite)
{
return(await Task.FromResult(AccessMode.PublicReadWrite));
}
else if (!isPublicRead && isPublicWrite)
{
return(await Task.FromResult(AccessMode.Private));
}
else
{
return(await Task.FromResult(AccessMode.Private));
}
}
