我正在尝试在存储桶上使用“listObjects”操作。这是通过 WebService 访问的,我不想授予用户控制台访问权限。
角色政策
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"mobileanalytics:PutEvents",
"cognito-sync:*",
"cognito-identity:*"
],
"Resource": [
"*"
]
},
{
"Action": [
"s3:ListBucket"
],
"Effect": "Allow",
"Resource": [
"arn:aws:s3:::BucketName"
],
"Condition": {
"StringLike": {
"s3:prefix": [
"${cognito-identity.amazonaws.com:sub}/*"
]
}
}
}
]
}
信托政策
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Federated": "cognito-identity.amazonaws.com"
},
"Action": "sts:AssumeRoleWithWebIdentity",
"Condition": {
"StringEquals": {
"cognito-identity.amazonaws.com:aud": "somevalue"
},
"ForAnyValue:StringLike": {
"cognito-identity.amazonaws.com:amr": "authenticated"
}
}
}
]
}
如果我用实际值替换“${cognito-identity.amazonaws.com:sub}”,那么它就可以工作,否则它会给出 AccessDenied 错误。看来我错过了一些非常简单的事情。请帮忙。
Error :
cfId:undefined
code:"AccessDenied"
extendedRequestId:undefined
message:"Access Denied"
region:null
requestId:null
retryDelay:14.650563118124381
retryable:false
statusCode:403
time:Sun May 14 2017 23:11:57 GMT+0530
name:"AccessDenied"
stack:"AccessDenied: Access Denied↵ at constructor.extractError (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:24:11663)↵ at constructor.callListeners (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:27756)↵ at constructor.emit (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:27465)↵ at constructor.emitEvent (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:15469)↵ at constructor.e (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:11925)↵ at a.runTo (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:24:27302)↵ at http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:24:27509↵ at constructor.<anonymous> (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:12135)↵ at constructor.<anonymous> (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:15524)↵ at constructor.callListeners (http://localhost:8081/aws-cognito/aws-sdk-2.3.5.min.js:23:27862)"
__proto__:Object